OBAS / Optibase - Документы SEC, Годовой отчет, Доверенное заявление

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15F CERTIFICATION OF A FOREIGN PRIVATE ISSUER’S TERMINATION OF REGISTRATION OF A CLASS OF SECURITIES UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ITS TERMIN

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15F CERTIFICATION OF A FOREIGN PRIVATE ISSUER’S TERMINATION OF REGISTRATION OF A CLASS OF SECURITIES UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ITS TERMINATION OF THE DUTY TO FILE REPORTS UNDER SECTION 13(a) OR SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number 000-29992 OPTIBAS

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.2 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2021, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 12.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Yakir Ben-Naim, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misle

As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-137644 THE SECURITIES ACT OF 1933 OPTIB

Registration No. 333 - 137644 As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-137644 UNDER THE SECURITIES ACT OF 1933 OPTIBASE LTD. (Exact name of Registrant as specified in its charter) Israel Not Applicable (State or Other Jurisdiction

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2021, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

DESCRIPTION OF SHARE CAPITAL

Exhibit 2.1 DESCRIPTION OF SHARE CAPITAL The following descriptions of our share capital and provisions of our amended and restated articles of association are summaries and do not purport to be complete. Our amended and restated articles of incorporation are filed with the SEC as an exhibit to this Annual Report on Form 20-F. Purposes and Objectives of the Company We are a private company registe

UNITED STATES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT O

As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-122128 THE SECURITIES ACT OF 1933 OPTIB

S-8 POS 1 zk2227689.htm S-8 POS Registration No. 333 - 122128 As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-122128 UNDER THE SECURITIES ACT OF 1933 OPTIBASE LTD. (Exact name of Registrant as specified in its charter) Israel Not Applica

As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-198519 THE SECURITIES ACT OF 1933 OPTIB

Registration No. 333 - 198519 As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-198519 UNDER THE SECURITIES ACT OF 1933 OPTIBASE LTD. (Exact name of Registrant as specified in its charter) Israel Not Applicable (State or Other Jurisdiction

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 12.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Amir Philips, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mislead

As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-148774 THE SECURITIES ACT OF 1933 OPTIB

S-8 POS 1 zk2227692.htm S-8 POS Registration No. 333 - 148774 As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-148774 UNDER THE SECURITIES ACT OF 1933 OPTIBASE LTD. (Exact name of Registrant as specified in its charter) Israel Not Applica

As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-139688 THE SECURITIES ACT OF 1933 OPTIB

Registration No. 333 - 139688 As filed with the Securities and Exchange Commission on April 27, 2022 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT TO FORM S-8 REGISTRATION STATEMENT NO. 333-139688 UNDER THE SECURITIES ACT OF 1933 OPTIBASE LTD. (Exact name of Registrant as specified in its charter) Israel Not Applicable (State or Other Jurisdiction

THIS VERSION IS AN UNOFFICIAL TRANSLATION OF THE ARTICLES OF ASSOCIATION THE HEBREW LANGUAGE FOR CONVENIENCE PURPOSES ONLY. THE BINDING VERSION OF THIS ARTICLES OF ASSOCIATION IS IN THE HEBREW LANGUAGE. Articles of Association Optibase Ltd. (the “Com

Exhibit 1.2 THIS VERSION IS AN UNOFFICIAL TRANSLATION OF THE ARTICLES OF ASSOCIATION THE HEBREW LANGUAGE FOR CONVENIENCE PURPOSES ONLY. THE BINDING VERSION OF THIS ARTICLES OF ASSOCIATION IS IN THE HEBREW LANGUAGE. Articles of Association Of Optibase Ltd. (the ?Company?) TABLE OF CONTENTS First Chapter ? General 3 1. Introduction 3 2. Private Company 4 3. Donations 4 4. Objectives of the Company 4

OBAS / Optibase Ltd. / Capri Family Foundation - SC 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULED 13d-2(a) UNDER THE SECURITIES ACT OF 1934 (Amendment No. 10) OPTIBASE LTD. (Name of Issuer) Ordinary Shares Nominal value NIS 0.65 per share M7524R116 (Title of class of securities) (CUSIP number

EX-99.25

Form 25

Press release, dated March 22, 2022.

EX-99.1 2 exhibit99-1.htm EXHIBIT 99.1 Exhibit 99.1 The Capri Family Foundation Completes its Acquisition of Shares of Optibase Ltd. (Nasdaq: OBAS) Tel Aviv, Israel, March 22, 2022 – The Capri Family Foundation (“Capri”) announced today the results of its tender offer to purchase 941,942 ordinary shares of Optibase Ltd. (“Optibase”)(Nasdaq and TASE: OBAS), for $12.64 per share. The tender offer, w

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) (Amendment No. 3) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) (Amendment No. 3) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject Company) OPTIBASE LTD. (Name of Person(s) Filing Statement) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of Class of Securities) M7524R116 (C

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 Under the Securities Exchange Act of 1934 For the Month of March 2022 Commission File No.: 000-29992 O

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 Under the Securities Exchange Act of 1934 For the Month of March 2022 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executi

The Capri Family Foundation Completes Tender Offer for Optibase

Exhibit 99.1 The Capri Family Foundation Completes Tender Offer for Optibase HERZLIYA, Israel, March 23, 2022 ? Optibase Ltd. (NASDAQ: OBAS) (?Optibase?) today announced the results of the previously announced tender offer (the ?Bid?) in cash for all outstanding ordinary shares (?Ordinary Shares?) of Optibase that are not yet owned by The Capri Family Foundation (the ?Capri?) and its affiliates, w

Text of Press Release issued by the Bidder on March 22, 2022.

Exhibit (a)(5)(F) The Capri Family Foundation Completes its Acquisition of Shares of Optibase Ltd.

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (AMENDMENT NO. 4) OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER ROUVEN SCHWARZ (Name of Filing Person (Offeror)) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of: March 2022 Commission File No.: 000-29992 OPTIBASE LTD. (Tr

6-K 1 zk2227486.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of: March 2022 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal

OPTIBASE LTD. ANNOUCES SALE OF APARTMENTS AND PENTHOUSES IN MIAMI, FLORIDA AND FULL REPAYMENT OF A LOAN

EXHIBIT 99.1 Media Contacts: Amir Philips, CEO, Optibase Ltd. 011-972-73-7073-700 [email protected] Investor Relations Contact: Marybeth Csaby, for Optibase +1- 917-664-3055 [email protected] OPTIBASE LTD. ANNOUCES SALE OF APARTMENTS AND PENTHOUSES IN MIAMI, FLORIDA AND FULL REPAYMENT OF A LOAN HERZLIYA, Israel, March 15, 2022 ? Optibase Ltd. (NASDAQ: OBAS) (the "Company" or "Optib

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (AMENDMENT NO. 3) OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER ROUVEN SCHWARZ (Name of Filing Person (Offeror)) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) (Amendment No. 2) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) (Amendment No. 2) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject Company) OPTIBASE LTD. (Name of Person(s) Filing Statement) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of Class of Securities) M7524R116 (C

DLA Piper LLP (US)

CORRESP 1 filename1.htm DLA Piper LLP (US) 500 Eighth Street, NW Washington, DC 20004 www.dlapiper.com Sanjay M. Shirodkar [email protected] T 202.799.4184 F 202.799.5020 March 7, 2022 United States Securities and Exchange Commission Division of Corporation Finance Office of Mergers & Acquisitions 100 F Street, N.E. Washington, D.C. 20549 Attention: Ms. Christina Chalk Re: OPTIBASE LTD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) (Amendment No. 1) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject

SC 14D9/A 1 zk2227388.htm SC 14D9/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) (Amendment No. 1) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject Company) OPTIBASE LTD. (Name of Person(s) Filing Statement) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title

Text of Press Release issued by the Bidder on February 23, 2022.*

Exhibit (a)(5)(E) The Capri Family Foundation Files Updated Fairness Opinion, Extends Expiration Date of its Tender Offer for Shares of Optibase Ltd.

Form of Cover of ‘Mifrat’ filed with the Israel Securities Authority.*¶

Exhibit (a)(5)(B) Note: The following is an un-official English translation of the Hebrew Cover Page of the Offer to Purchase that was published in Israel pursuant to Israeli law.

Fairness Opinion of MNS Consulting Ltd., dated February 22, 2022.*

Exhibit (c)(7) Expert Opinion in the matter of: The Capri Family Foundation Fair offer price to the unaffiliated holders of Optibase Ltd.

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (AMENDMENT NO. 2) OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER (Name of Filing Person (Offeror)) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of Class of Secur

Text of Press Release issued by the Bidder on February 18, 2022.*

Exhibit (a)(5)(D) The Capri Family Foundation Increases its Offer Price for Shares of Optibase Ltd.

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934

SC TO-T/A 1 zk2227352.htm SC TO-T/A SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (AMENDMENT NO. 1) OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER (Name of Filing Person (Offeror)) ORDINARY SHARES, PAR VALUE NIS 0.6

Filing fee table.

Exhibit 107.1 Calculation of Filing Fee Tables Schedule TO (Rule 14d-100) (Amendment No. 1) OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER (Names of Filing Persons (Offerors)) Table 1?Transaction Valuation Transaction Valuation Fee rate Amount of Filing Fee Fees to Be Paid $ 979,620 .0000927 $ 91 Fees Previously Paid $ 10,926,527 $ 1,013 Total Trans

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject Company) OPTIBASE

SC 14D9 1 zk2227339.htm SC 14D9 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject Company) OPTIBASE LTD. (Name of Person(s) Filing Statement) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of Class of Securities

Press release, dated February 16, 2022.

EXHIBIT 99.1 OPTIBASE LTD. CONFIRMS RECEIPT OF UNSOLICITED TENDER OFFER HERZLIYA, Israel, February 16, 2022 ? Optibase Ltd. (NASDAQ: OBAS) today confirmed that it has received notice that The Capri Family Foundation, a foundation organized under the laws of the Republic of Panama (the ?Bidder?) and Shlomo (Tom) Wyler have commended an unsolicited tender offer to purchase 941,942 outstanding ordina

Letter of Transmittal.*

Exhibit (a)(1)(B) LETTER OF TRANSMITTAL To Tender Ordinary Shares of OPTIBASE LTD.

Updated Evaluation of MNS Consulting, dated February 14, 2022.*

EX-99 2 exhibita1-a.htm EXHIBIT (A)(1)(A) Exhibit (a)(1)(A) OFFER TO PURCHASE FOR CASH 941,942 ORDINARY SHARES OF OPTIBASE LTD. AT $11.60 NET PER SHARE BY THE CAPRI FAMILY FOUNDATION IN AN OFFER BEING CONDUCTED IN THE UNITED STATES AND ISRAEL THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 10:00 A.M., NEW YORK TIME, OR 5:00 P.M., ISRAEL TIME, ON MARCH 17, 2022, UNLESS THE OFFER IS EXTENDED. We, The

Valuation Report, dated February 1, 2022, of Wuest Partner AG regarding the commercial property of Optibase at Rümlang, Switzerland.*

Exhibit (c)(2) W?est Dimensions - Business intelligence by W?est Partner Valuation report Commercial property Riedmattstrasse 9 8153 R?mlang Switzerland Market value CHF 22,950,000 Valuation date 01.

Form of Notice of Guaranteed Delivery*

Exhibit (a)(1)(C) NOTICE OF GUARANTEED DELIVERY For Tender of Ordinary Shares of OPTIBASE LTD.

Valuation Report, dated December 31, 2021, of Wuest Partner AG regarding the commercial property of Optibase at Chemin des Aulx, Switzerland.*

Exhibit (c)(1) W?est Dimensions - Business intelligence by W?est Partner Valuation report Commercial property Plan-les-Ouates, Chemin des Aulx 8-18 Chemin des Aulx 8-18 1228 Plan-les-Ouates Switzerland Market value CHF 141,420,000 Report date 31.

Form of Acceptance Notice filed with the Israel Securities Authority.*¶

Exhibit (a)(5)(C) Note: The following are un-official English translations of the Hebrew Acceptance Notices that were published in Israel pursuant to Israeli law.

Text of Press Release issued by the Bidder on February 15, 2022.*

Exhibit (a)(5)(A) The Capri Family Foundation Commences Second Cash Tender Offer for Optibase Ltd.

Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.*

Exhibit (a)(1)(D) Offer to Purchase for Cash 941,942 Ordinary Shares of OPTIBASE LTD.

Declaration Form (“Declaration of Status for Israeli Income Tax Purposes”).*

Exhibit (a)(1)(F) DECLARATION OF STATUS FOR ISRAELI INCOME TAX PURPOSES Do not send this form to the IRS.

Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.*

Exhibit (a)(1)(E) Offer to Purchase for Cash 941,942 Ordinary Shares of OPTIBASE LTD.

Filing fee table.

Exhibit 107.1 Calculation of Filing Fee Tables Schedule TO (Rule 14d-100) OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER (Names of Filing Persons (Offerors)) Table 1?Transaction Valuation Transaction Valuation Fee rate Amount of Filing Fee Fees to Be Paid $ 10,926,528 .0000927 $ 1,013 Fees Previously Paid 0 0 Total Transaction Valuation $ 10,926,528

Form of Cover of ‘Mifrat’ filed with the Israel Securities Authority on February 15, 2022.*¶

Exhibit (a)(5)(B) Note: The following is an un-official English translation of the Hebrew Cover Page of the Offer to Purchase that was published in Israel pursuant to Israeli law.

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FO

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER (Name of Filing Person (Offeror)) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of Class of Securities) M7524R116 (

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of: January 2022 Commission File No.: 000-29992 OPTIBASE LTD. (

6-K 1 zk2227073.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of: January 2022 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of princip

OPTIBASE LTD. REQUESTS THE TEL AVIV STOCK EXCHANGE TO DELIST ITS SHARES

EX-99.1 2 exhibit99-1.htm EXHIBIT 99.1 Exhibit 99.1 Media Contacts: Amir Philips, CEO, Optibase Ltd. 011-972-73-7073-700 [email protected] Investor Relations Contact: Marybeth Csaby, for Optibase +1- 917-664-3055 [email protected] OPTIBASE LTD. REQUESTS THE TEL AVIV STOCK EXCHANGE TO DELIST ITS SHARES HERZLIYA, Israel, January 11 ,2022 – Optibase Ltd. (NASDAQ: OBAS), the Company or

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of: January 2022 Commission File No.: 000-29992 OPTIBASE LTD. (

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of: January 2022 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) In

OBAS / Optibase Ltd. / Capri Family Foundation - SC 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULED 13d-2(a) UNDER THE SECURITIES ACT OF 1934 (Amendment No. 9) OPTIBASE LTD. (Name of Issuer) Ordinary Shares Nominal value NIS 0.65 per share M7524R116 (Title of class of securities) (CUSIP number)

Text of Press Release issued by the Bidder on January 3, 2022, announcing the final results of the offer.

Exhibit (a)(5)(D) The Capri Family Foundation Announces the Results of its Tender Offer for Optibase Ltd.

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (AMENDMENT NO. 2) OPTIBASE LTD. (Name of Subject Company (Issuer)) T

SC TO-T/A 1 zk2227002.htm SC TO-T/A SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (AMENDMENT NO. 2) OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER (Name of Filing Person (Offeror)) ORDINARY SHARES, PAR VALUE NIS 0.6

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (AMENDMENT NO. 1) OPTIBASE LTD. (Name of Subject Company (Issuer)) T

SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (AMENDMENT NO. 1) OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER (Name of Filing Person (Offeror)) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of Class of Secur

Form of Cover of ‘Mifrat’ filed with the Israel Securities Authority.

Exhibit (a)(5)(B) Note: The following is an un-official English translation of the Hebrew Cover Page of the Offer to Purchase that was published in Israel pursuant to Israeli law.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101)

SC 14D9/A 1 zk2126956.htm SC 14D9/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) (Amendment No. 1) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject Company) OPTIBASE LTD. (Name of Person(s) Filing Statement) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title

Press release, dated December 2, 2021.

Exhibit 99.1 OPTIBASE LTD. CONFIRMS RECEIPT OF UNSOLICITED TENDER OFFER HERZLIYA, Israel, December 2, 2021 – Optibase Ltd. (NASDAQ: OBAS) today confirmed that it has received notice that The Capri Family Foundation, a foundation organized under the laws of the Republic of Panama (the “Bidder”) and Shlomo (Tom) Wyler have commended an unsolicited tender offer to purchase 959,837 outstanding ordinar

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject Company) OPTIBASE

SC 14D9 1 zk2126910.htm SC 14D9 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 (RULE 14d-101) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 OPTIBASE LTD. (Name of Subject Company) OPTIBASE LTD. (Name of Person(s) Filing Statement) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of Class of Securities

Declaration Form (“Declaration of Status for Israeli Income Tax Purposes”).

EX-99 7 exhibita1-f.htm EXHIBIT (A)(1)(F) Exhibit (a)(1)(F) DECLARATION OF STATUS FOR ISRAELI INCOME TAX PURPOSES Do not send this form to the IRS. See separate instructions on the back cover of this form. Read this form together with the Offer to Purchase and Letter of Transmittal accompanying this form. PAYER'S NAME: American Stock Transfer & Trust Company, as U.S. Depositary Who may use this fo

Text of Press Release issued by the Bidder on December 1, 2021.

EX-99 8 exhibita5-a.htm EXHIBIT (A)(5)(A) Exhibit (a)(5)(A) The Capri Family Foundation Commences Cash Tender Offer for Optibase Ltd. (Nasdaq: OBAS) Tel Aviv, Israel, December 1, 2021 – The Capri Family Foundation (“Capri”) announced today that it has commenced a cash tender offer to purchase 959,837 ordinary shares of Optibase Ltd. (“Optibase”) (Nasdaq and TASE: OBAS) for $11.20 per share. The bi

Financial analysis of MNS Consulting, dated October 2021.§

Exhibit (C)(4) October 21 Optibase LtdValuation Disclaimer We have been asked by The Capri Family Foundation (the “Client”) to provide our independent opinion and to evaluate the fair value of Optibase Ltd (the “Company”; the “Evaluation”), regarding with The Capri Family Foundation’s Ofer To Purchase (the “Purpose”).

Valuation Reports, dated March 2021, of Florida House Appraisers, regarding 24 residential condominium units of Optibase in Miami, Florida.§

Exhibit (c)(3) Florida House Appraisals INDIVIDUAL CONDO UNIT APPRAISAL REPORT File No.

Valuation Report, dated April 1, 2020, of Wuest Partner AG regarding the commercial property of Optibase at Rumlang, Switzerland.

EX-99 14 exhibitc2.htm EXHIBIT (C)(2) Exhibit (c)(2) Wüest Dimensions - Business intelligence by Wüest Partner Valuation report Commercial property Riedmattstrasse 9 8153 Rümlang Switzerland Market value CHF 25,070,000 Valuation date 01.04.2020 Valuation purpose Update Customer Optibase RE1, 45, boulevard Napoléon, 1120 Luxembourg, Luxembourg Yakir Ben Naim, +972-54-456-3894 Project reference numb

Indemnification Agreement, dated November 30, 2021, by the Bidder in favor of the directors and officers of Optibase.§

EX-99 17 exhibitd.htm EXHIBIT (D) Exhibit D Indemnification Undertaking Dated [ ], 2021 (the “Undertaking”) In connection with the announcement of The Capri Family Foundation (“Capri”) that it and/or its affiliates are contemplating to commence a tender offer to acquire all Ordinary Shares, par value NIS 0.65 per share (the “Ordinary Shares”), of Optibase Ltd., a company organized under the laws o

Valuation Report, dated December 31, 2020, of Wuest Partner AG regarding the commercial property of Optibase at Chemin des Aulx, Switzerland.

EX-99 13 exhibitc1.htm EXHIBIT (C)(1) Exhibit (c)(1) Wüest Dimensions - Business intelligence by Wüest Partner Valuation report Commercial property Plan-les-Ouates, Chemin des Aulx 8-18 Chemin des Aulx 8-18 1228 Plan-les-Ouates Switzerland Market value CHF 140,970,000 Report date 31.12.2020 Valuation purpose Update Customer Eldista GmbH Project reference number (PRN) 102688.2001 Valuation Id 101-4

Letter of Transmittal.

EX-99 3 exhibita1-b.htm EXHIBIT (A)(1)(B) Exhibit (a)(1)(B) LETTER OF TRANSMITTAL To Tender Ordinary Shares of OPTIBASE LTD. Pursuant to the Offer to Purchase dated December 1, 2021 by THE CAPRI FAMILY FOUNDATION THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 10:00 A.M., NEW YORK TIME, OR 5:00 P.M., ISRAEL TIME, ON DECEMBER 30, 2021, UNLESS THE OFFER IS EXTENDED. Mail or deliver this Letter of Tra

Initial Evaluation of MNS Consulting, dated November 30, 2021.§

EX-99 2 exhibita1-a.htm EXHIBIT (A)(1)(A) Exhibit (a)(1)(A) OFFER TO PURCHASE FOR CASH 959,837 ORDINARY SHARES OF OPTIBASE LTD. AT $11.20 NET PER SHARE BY THE CAPRI FAMILY FOUNDATION IN AN OFFER BEING CONDUCTED IN THE UNITED STATES AND ISRAEL THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 10:00 A.M., NEW YORK TIME, OR 5:00 P.M., ISRAEL TIME, ON DECEMBER 30, 2021, UNLESS THE OFFER IS EXTENDED. We,

General Deed of Pledge, dated September 21, 2018, by the Bidder in favor of Credit Suisse (Switzerland) Ltd. §

EX-99 12 exhibitb2.htm EXHIBIT (B)(2) Exhibit (b)(2) CREDIT SUISSE (Switzerland) Ltd. Paradeplatz 8 8001 Zurich 04 190219 008154 General Deed of Pledge Pledgor Name(s), first name(s)/Company The Capri Family Foundation Client Name(s), first name(s)/Company The Capri Family Foundation 1. The Pledgor hereby grants Credit Suisse (Switzerland) Ltd. (hereinafter referred to as the Bank) a right of lien

Letter to Clients for use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.

EX-99 6 exhibita1-e.htm EXHIBIT (A)(1)(E) Exhibit (a)(1)(E) Offer to Purchase for Cash 959,837 Ordinary Shares of OPTIBASE LTD. at $11.20 PER SHARE by THE CAPRI FAMILY FOUNDATION THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 10:00 A.M., NEW YORK TIME, AND 5:00 P.M. ISRAEL TIME, ON DECEMBER 30, 2021, UNLESS THE OFFER IS EXTENDED. December 1, 2021 To Our Clients: Enclosed for your consideration are

Form of Cover of ‘Mifrat’ to be filed with the Israel Securities Authority on December 1, 2021.*

EX-99 9 exhibita5-b.htm EXHIBIT (A)(5)(B) Exhibit (a)(5)(B) Note: The following is an un-official English translation of the Hebrew Cover Page of the Offer to Purchase that was published in Israel pursuant to Israeli law. The original Cover Page, written in Hebrew, is the exclusive legally binding version and the Offerors (as defined below) assume no liability for any of the statements or represen

Initial Evaluation of MNS Consulting, dated November 30, 2021.§

SC TO-T 1 zk2126893.htm SC TO-T SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (Rule 14d-100) Tender Offer Statement under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 OPTIBASE LTD. (Name of Subject Company (Issuer)) THE CAPRI FAMILY FOUNDATION SHLOMO (TOM) WYLER (Name of Filing Person (Offeror)) ORDINARY SHARES, PAR VALUE NIS 0.65 PER SHARE (Title of

Form of Acceptance Notice to be filed with the Israel Securities Authority on December 1, 2021.*

EX-99 10 exhibita5-c.htm EXHIBIT (A)(5)(C) Exhibit (a)(5)(C) Note: The following are un-official English translations of the Hebrew Acceptance Notices that were published in Israel pursuant to Israeli law. The originals of these documents, written in Hebrew, are the exclusive legally binding versions and the Offerors (as defined below) assume no liability for any of the statements or representatio

Form of Notice of Guaranteed Delivery

Exhibit (a)(1)(C) NOTICE OF GUARANTEED DELIVERY For Tender of Ordinary Shares of OPTIBASE LTD.

Confirmation of Framework Credit Limit, dated February 8, 2019, between Credit Suisse (Switzerland) Ltd. and the Bidder. §

Exhibit (b)(1) CREDIT SUISSE (Switzerland) Ltd. Paradeplatz 8 8001 Zurich 04 190219 008158 Application for a Framework Credit Limit ? Mr. ? Ms. ? Company ? Number Last name, first name/company The Capri Family Foundation Street/no. Venturi House No. 1, Calle 49, Bella Vista (hereinafter referred to as the Borrower) hereby requests from Credit Suisse (Switzerland) Ltd. (hereinafter referred to as t

Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.

EX-99 5 exhibita1-d.htm EXHIBIT (A)(1)(D) Exhibit (a)(1)(D) Offer to Purchase for Cash 959,837 Ordinary Shares of OPTIBASE LTD. at $11.20 PER SHARE by THE CAPRI FAMILY FOUNDATION THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 10:00 A.M., NEW YORK TIME, AND 5:00 P.M., ISRAEL TIME, ON DECEMBER 30, 2021, UNLESS THE OFFER IS EXTENDED. December 1, 2021 To Brokers, Dealers, Commercial Banks, Trust Compa

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 30, 2021 Commission File No.: 000-29992 OPTIBASE LTD

6-K 1 zk2126903.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 30, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of prin

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 24, 2021 Commission File No.: 000-29992 OPTIBASE LTD

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 24, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: October 19, 2021 Commission File No.: 000-29992 OPTIBASE LTD.

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: October 19, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel

Exhibit 99.1 OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel +972-73-7073700 Dear Shareholder, You are cordially invited to attend the Extraordinary General Meeting of Shareholders of Optibase Ltd. (the "Company") to be held at 4:00 p.m., Israel time, on Wednesday, November 24, 2021, at the Company?s offices at 8 Hamenofim Street, Herzliya, Israel. The purpose of this meeting is set forth in the

OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON November 24, 2021

EX-99.2 3 exhibit99-2.htm EXHIBIT 99.2 Exhibit 99.2 OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON November 24, 2021 KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Amir Philips and Yakir Ben-Naim, and each of them, as agent and proxy for the undersigned, with full power of

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 31, 2021 Commission File No.: 000-29992 OPTIBASE LTD.

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 31, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) I

FORM 6-K/A (Amendment No. 1) SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 24, 2021 Commission File No.: 000-

FORM 6-K/A (Amendment No. 1) SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 24, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 17, 2021 Commission File No.: 000-29992 OPTIBASE LTD.

6-K 1 zk2126485.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 17, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of princi

OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE ANNUAL AND EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON AUGUST 17, 2021

EX-99.2 3 exhibit99-2.htm EXHIBIT 99.2 Exhibit 99.2 OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE ANNUAL AND EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON AUGUST 17, 2021 KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Amir Philips and Yakir Ben-Naim, and each of them, as agent and proxy for the undersigned, with full

OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel

Exhibit 99.1 OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel +972-73-7073700 Dear Shareholder, You are cordially invited to attend the Annual and Extraordinary General Meeting of Shareholders of Optibase Ltd. (the "Company") to be held at 4:00 p.m., Israel time, on Tuesday, August 17, 2021, at the Company?s offices at 8 Hamenofim Street, Herzliya, Israel. The purpose of this meeting is set forth

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: July 8, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Tr

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: July 8, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

OBAS / Optibase Ltd. / Capri Family Foundation - SC 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULED 13d-2(a) UNDER THE SECURITIES ACT OF 1934 (Amendment No. 8) OPTIBASE LTD. (Name of Issuer) Ordinary Shares Nominal value NIS 0.65 per share M7524R116 (Title of class of securities) (CUSIP number)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 2, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Tr

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 2, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 25, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Tr

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 25, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

Current Report of Foreign Issuer - 6-K

6-K 1 zk2125983.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 5, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 27, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) In

Consent of EisnerAmper LLP Accountants and Advisors.

Exhibit 15.2 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements of Optibase Ltd. on Form S-8 (Nos. 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) of our report, dated April 27, 2021, on our audits of the consolidated balance sheets of 300 River Holdings LLC as of December 31, 2020 and 2019 and

Compensation Policy of Optibase Ltd. as amended on December 30, 2020.

EX-4.23 6 exhibit4-23.htm EXHIBIT 4.23 Exhibit 4.23 COMPENSATION POLICY OPTIBASE LTD. Compensation Policy for Executive Officers and Directors (As Adopted by the Shareholders on February 14, 2019 and as amended on February 18, 2020 and on December 30, 2020) Table of Contents Page A. Overview and Objectives A - 3 B. Base Salary and Benefits A - 4 C. Cash Bonuses A - 5 D. Equity-Based Compensation A

- 20-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F ? REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT O

Certification by Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Exhibit 12.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Amir Philips, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mislead

Framework Agreement between Eldista GmbH and CREDIT SUISSE (Switzerland) Ltd, dated January 8, 2020.

EX-4.7 3 exhibit4-7.htm EXHIBIT 4.7 Exhibit 4.7 FRAMEWORK AGREEMENT FOR MORTGAGE LOAN between Eldista GmbH, rue des Pierres-du-Niton 17, c/o INTEREXPERTS SA, 1207 Genève (hereinafter referred to as the “Borrower”) and CREDIT SUISSE (Switzerland) Ltd. Mailing address: SGLB 8, 8070 Zurich Contact address: Uetlibergstrasse 231, 8045 Zurich (the lender, hereinafter referred to as the “Bank”) Amount of

Consent of Kost, Forer Gabbay & Kasierer, a member of Ernst & Young Global.

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated April 27, 2021, with respect to the consolidated financial statements of Optibase Ltd., included in this Annual Re

Current Report of Foreign Issuer - 6-K

6-K 1 zk2125936.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 27, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of princip

Loan Agreement between Optibase Real Estate Miami, LLC and City National Bank of Florida, dated July 1, 2015 as amended on November 17, 2017 (incorporated by reference to Exhibit 4.18 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2017), and as amended on March 31, 2020.

EX-4.18 5 exhibit4-18.htm EXHIBIT 4.18 Exhibit 4.18 SECOND AMENDMENT AND RATIFICATION OF LOAN AGREEMENT AND OTHER LOAN DOCUMENTS THIS SECOND AMENDMENT AND RATIFICATION OF LOAN AGREEMENT AND OTHER LOAN DOCUMENTS (this “Agreement”) is entered into on this 31st day of March, 2020, by and among OPTIBASE REAL ESTATE MIAMI, LLC, a Delaware limited liability company (the “Borrower”), OPTIBASE, INC., a Ca

Certification by Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

EX-13 10 exhibit13-1.htm EXHIBIT 13.1 Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2020, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned he

Security Agreement between Eldista GmbH and CREDIT SUISSE (Switzerland) Ltd, dated January 8,2020.

EX-4.8 4 exhibit4-8.htm EXHIBIT 4.8 Exhibit 4.8 CREDIT SUISSE (Switzerland) Ltd. Paradeplatz 8 8001 Zürich Agreement (Collateral Agreement) between Eldista GmbH rue des Pierres-du-Niton 17, c/o INTEREXPERTS SA 1207 Genève (hereinafter referred to as the Provider(s) of Collateral) and Credit Suisse (Switzerland) Ltd. (hereinafter referred to as the Bank). 1. The Bank holds or acquires creditors’ ri

Certification by Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Exhibit 13.2 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2020, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

Certification by Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

EX-12 9 exhibit12-2.htm EXHIBIT 12.2 Exhibit 12.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Yakir Ben-Naim, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which

Current Report of Foreign Issuer - 6-K

6-K 1 zk2125934.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 27, 2021 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of princip

Description of Share Capital.

Exhibit 2.1 DESCRIPTION OF SHARE CAPITAL The following descriptions of our share capital and provisions of our amended and restated articles of association are summaries and do not purport to be complete. Our amended and restated articles of incorporation are filed with the SEC as an exhibit to this Annual Report on Form 20-F. Purposes and Objects of the Company We are a public company registered

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: December 30, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 30, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE ANNUAL AND EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 30, 2020

Exhibit 99.2 OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE ANNUAL AND EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 30, 2020 KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Amir Philips and Yakir Ben-Naim, and each of them, as agent and proxy for the undersigned, with full power of substitution, to vote with

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 24, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel

Exhibit 99.1 OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel +972-73-7073700 Dear Shareholder, You are cordially invited to attend the Annual and Extraordinary General Meeting of Shareholders of Optibase Ltd. (the "Company") to be held at 4:00 p.m., Israel time, on Wednesday, December 30, 2020, at the Company’s offices at 8 Hamenofim Street, Herzliya, Israel. The purpose of this meeting is set f

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: October 20, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 27, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) I

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: July 9, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

OPTIBASE LTD. ANNOUNCES COMPLETION OF THE SALE OF ITS GERMAN COMMERCIAL PROPERTIES PORTFOLIO

Exhibit 99.1 Media Contacts: Amir Philips, CEO, Optibase Ltd. 011-972-73-7073-700 [email protected] Investor Relations Contact: Marybeth Csaby, for Optibase +1- 917-664-3055 [email protected] OPTIBASE LTD. ANNOUNCES COMPLETION OF THE SALE OF ITS GERMAN COMMERCIAL PROPERTIES PORTFOLIO HERZLIYA, Israel, July 9, 2020 – Optibase Ltd. (NASDAQ: OBAS), or Optibase, today announced that fu

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: July 1, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 23, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Ind

Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 1, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 1, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Ind

Consent of EisnerAmper LLP Accountants and Advisors.

Exhibit 15.2 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements of Optibase Ltd. on Form S-8 (Nos. 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) of our report, dated April 1, 2020, on our audit of the consolidated balance sheets of 300 River Holdings LLC as of December 31, 2019 and 2018 and f

Compensation Policy of Optibase Ltd. as amended on February 18, 2020.

Exhibit 4.23 COMPENSATION POLICY OPTIBASE LTD. Compensation Policy for Executive Officers and Directors (As Adopted by the Shareholders on February 14, 2019 and as amended on February 18, 2020 ) Table of Contents Page A. Overview and Objectives A - 3 B. Base Salary and Benefits A - 4 C. Cash Bonuses A - 5 D. Equity-Based Compensation A - 7 E. Retirement and Termination of Service Arrangements A -

Assets Sale Agreement between Optibase Bavaria GmbH & Co., Optibase Bavaria Holding GmbH & Co and Deutsche Konsum REIT-AG, dated February 10, 2020 (unofficial English translation).

Exhibit 4.24 in extract form, excluding conveyance in sub-clause 16.2 Deed Roll No. 67/2020 - Original document written on one side throughout - - Copies and duplicates written on both sides - Executed in Berlin Today, 10 February 2020, the following persons appeared before me, the undersigned Notary Dr. Andreas Manthey, Joachimsthaler Straße 24, 10719 Berlin, 1. Mr. Julius Falcinelli, born on 27/

Certification by Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2019, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

Certification by Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Exhibit 12.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Yakir Ben-Naim, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misle

Description of Share Capital.

Exhibit 2.1 DESCRIPTION OF SHARE CAPITAL The following descriptions of our share capital and provisions of our amended and restated articles of association are summaries and do not purport to be complete. Our amended and restated articles of incorporation are filed with the SEC as an exhibit to this Annual Report on Form 20-F. Purposes and Objects of the Company We are a public company registered

Certification by Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Exhibit 13.2 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2019, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

Certification by Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Exhibit 12.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Amir Philips, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mislead

OBAS / Optibase Ltd. 20-F - - 20-F

As filed with the Securities and Exchange Commission on April 1, 2020 SECURITIES AND EXCHANGE COMMISSION Washington, D.

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 1, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Ind

Consent of Kost, Forer Gabbay & Kasierer, a member of Ernst & Young Global.

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated April 1, 2020, with respect to the consolidated financial statements of Optibase Ltd., included in this Annual Rep

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: February 18, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: February 11, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OPTIBASE LTD. ANNOUNCES THE SALE OF ITS GERMAN COMMERCIAL PROPERTIES PORTFOLIO

Exhibit 99.1 Media Contacts: Amir Philips, CEO, Optibase Ltd. 011-972-73-7073-700 [email protected] Investor Relations Contact: Marybeth Csaby, for Optibase +1- 917-664-3055 [email protected] OPTIBASE LTD. ANNOUNCES THE SALE OF ITS GERMAN COMMERCIAL PROPERTIES PORTFOLIO HERZLIYA, Israel, February 11, 2020 – Optibase Ltd. (NASDAQ: OBAS), or Optibase, today announced that its wholly

OBAS / Optibase Ltd. 6-K/A - Current Report of Foreign Issuer - 6-K/A

FORM 6-K/A (Amendment No. 1) SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: January 16, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal

A form of Proxy Card whereby holders of ordinary shares of the Company may vote at the meeting without attending in person, attached hereto as Exhibit 99.2

Exhibit 99.2 OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON FEBRUARY 18, 2020 KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Amir Philips and Yakir Ben-Naim, and each of them, as agent and proxy for the undersigned, with full power of substitution, to vote with respect to

Notice and Proxy Statement with respect to the Company’s Extraordinary General Meeting of Shareholders

Exhibit 99.1 OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel +972-73-7073700 Dear Shareholder, You are cordially invited to attend the Extraordinary General Meeting of Shareholders of Optibase Ltd. (the “Company”) to be held at 4:00 p.m., Israel time, on February 18, 2020, at the Company’s offices at 8 Hamenofim Street, Herzliya, Israel. The purpose of this meeting is set forth in the accompanyi

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

6-K 1 zk2023826.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: January 13, 2020 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of princ

OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON FEBRUARY 18, 2020

Exhibit 99.2 OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON FEBRUARY 18, 2020 KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Amir Philips and Yakir Ben-Naim, and each of them, as agent and proxy for the undersigned, with full power of substitution, to vote with respect to

OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel

Exhibit 99.1 OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel +972-73-7073700 Dear Shareholder, You are cordially invited to attend the Extraordinary General Meeting of Shareholders of Optibase Ltd. (the “Company”) to be held at 4:00 p.m., Israel time, on February 18, 2020, at the Company’s offices at 8 Hamenofim Street, Herzliya, Israel. The purpose of this meeting is set forth in the accompanyi

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: December 31, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 27, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

6-K 1 zk1923694.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 25, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of prin

OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE ANNUAL AND EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 31, 2019

Exhibit 99.2 OPTIBASE LTD. THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS FOR THE ANNUAL AND EXTRAORDINARY GENERAL MEETING OF SHAREHOLDERS TO BE HELD ON DECEMBER 31, 2019 KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby constitutes and appoints Amir Philips and Yakir Ben-Naim, and each of them, as agent and proxy for the undersigned, with full power of substitution, to vote with

OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel

Exhibit 99.1 OPTIBASE LTD. 8 Hamenofim Street Herzliya, Israel +972-73-7073700 Dear Shareholder, You are cordially invited to attend the Annual and Extraordinary General Meeting of Shareholders of Optibase Ltd. (the "Company") to be held at 4:00 p.m., Israel time, on Tuesday, December 31, 2019, at the Company’s offices at 8 Hamenofim Street, Herzliya, Israel. The purpose of this meeting is set for

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: September 23, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 29, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) I

OBAS / Optibase Ltd. / Capri Family Foundation - SC 13D/A Activist Investment

SECURITIES AND EXCHANGE COMMISSION WASHINGTON D.C. 20549 SCHEDULE 13D (Rule 13d-101) INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULED 13d-2(a) UNDER THE SECURITIES ACT OF 1934 (Amendment No. 7) OPTIBASE LTD. (Name of Issuer) Ordinary Shares Nominal value NIS 0.65 per share M7524R116 (Title of class of securities) (CUSIP number)

Share Sale Agreement between Mr. Arthur Mayer-Sommer and The Capri Family Foundation dated May 29, 2019 relating to 255,240 Ordinary Shares.

EX-99.13 OTH CONTRCT 3 exhibit99-13.htm EXHIBIT 99.13 EXHIBIT 99.13 SHARE SALE AGREEMENT This SHARE SALE AGREEMENT (the “Agreement”) is made and entered into as of the 29th day of May 2019, by and between Mr. Arthur Mayer-Sommer bearer of Swiss passport No. * * *, from * * *, Herzelia, Israel (the “Vendor”); and Capri Family Foundation, a foundation organized under the laws of the Republic of Pana

Attorney's Certification dated June 19, 2019 certifying the signature authority of person(s) signing on behalf of Capri.

EXHIBIT 24.1 ATTORNEY CERTIFICATION I the undersigned, Alvaro Gormaz Typaldos, Attorney, hereby certify as follows: 1. Daniel Ernesto Tribaldos, Efrain Ramos Munoz and Raul Eduardo Molina, who signed the attached report, are authorized to sign on behalf of The Capri Family Foundation. 2. The above composition of signatures is binding on The Capri Family Foundation in respect of the attached report

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 18, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Ind

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 4, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

OBAS / Optibase Ltd. 6-K - Current Report of Foreign Issuer - 6-K

6-K 1 zk1923150.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 29, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: March 28, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) In

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: March 28, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) In

Certification by Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2018, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

OBAS / Optibase Ltd. 20-F

20-F 1 zk1922845.htm 20-F As filed with the Securities and Exchange Commission on March 28, 2019 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR ☐

Certification by Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Exhibit 12.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Yakir Ben-Naim, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misle

Consent of Kost, Forer Gabbay & Kasierer, a member of Ernst & Young Global.

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated March 28, 2019, with respect to the consolidated financial statements of Optibase Ltd., included in this Annual Re

Certification by Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Exhibit 12.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Amir Philips, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mislead

Consent of EisnerAmper LLP Accountants and Advisors.

Exhibit 15.2 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated March 28, 2019, with respect to the consolidated balance sheets of 300 River Holdings LLC as of December 31, 2018

Compensation Policy of Optibase Ltd.

Exhibit 4.23 COMPENSATION POLICY OPTIBASE LTD. Compensation Policy for Executive Officers and Directors (As Adopted by the Shareholders on February 14, 2019) Table of Contents Page A. Overview and Objectives A- 3 B. Base Salary and Benefits A- 4 C. Cash Bonuses A-5 D. Equity-Based Compensation A- 7 E. Retirement and Termination of Service Arrangements A- 7 F. Exemption, Indemnification and Insuran

Certification by Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Exhibit 13.2 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2018, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: March 6, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Ind

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

6-K 1 zk1922685.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: February 14, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of prin

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: January 9, 2019 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) I

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: December 20, 2018 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 29, 2018 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 14, 2018 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 30, 2018 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) I

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 30, 2018 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 28, 2018 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: March 28, 2018 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) In

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: March 28, 2018 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) In

OBAS / Optibase Ltd. 20-F

As filed with the Securities and Exchange Commission on March 28, 2018 SECURITIES AND EXCHANGE COMMISSION Washington, D.

Certification by Chief Financial Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Exhibit 12.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Yakir Ben-Naim, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misle

Certification by Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Exhibit 13.2 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2017, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

Loan Agreement between Optibase Real Estate Miami, LLC and City National Bank of Florida, dated July 1, 2015 as amended on November 17, 2017 (incorporated by reference to Exhibit 4.18 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2017).

EX-4.18 2 exhibit4-18.htm EXHIBIT 4.18 Exhibit 4.18 AMENDMENT AND RATIFICATION OF LOAN AGREEMENT THIS AMENDMENT AND RATIFICATION OF LOAN AGREEMENT (this “Agreement”) is entered into on this 17th day of November, 2017, by and between OPTIBASE REAL ESTATE MIAMI, LLC, a Delaware limited liability company (the “Borrower”) and CITY NATIONAL BANK OF FLORIDA, its successors and/or assigns (the “Lender”).

Consent of Kost, Forer Gabbay & Kasierer, a member of Ernst & Young Global.

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-10840; 333-12814; 333-13186; 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated March 28, 2018, with respect to the consolidated financial statements of Optibase

Form of Letter of Indemnification between Optibase, Ltd. and its directors and officers, as Amended on December 21, 2017 (incorporated by reference to Exhibit 6.1 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2017).

Exhibit 6.1 Annex A To OPTIBASE LTD. (the “Company”) Letter of Indemnification (the “Letter” or the “Indemnification Letter”) Whereas on November 2, 2005 the General Meeting of the Company approved, following the approval of the Company’s audit committee and board of directors, to indemnify the Officers of the Company in accordance with the Companies Law of 1999 (the “Companies Law”); Whereas on S

Certification by Chief Executive Officer pursuant to Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.

Exhibit 12.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Amir Philips, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mislead

Consent of EisnerAmper LLP Accountants and Advisors.

Exhibit 15.2 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-10840; 333-12814; 333-13186; 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated March 28, 2018, with respect to the consolidated financial statements of 300 Rive

Certification by Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2017, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: December 21, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 30, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 28, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 24, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

OBAS / Optibase Ltd. 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 15, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 30, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant's name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) I

Optibase (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: July 18, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant's name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Ind

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 30, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant's name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 25, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant's name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Indi

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 27, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) In

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.2 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-10840; 333-12814; 333-13186; 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated March 30, 2017, with respect to the consolidated financial statements of 300 Rive

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-10840; 333-12814; 333-13186; 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated March 30, 2017, with respect to the consolidated financial statements of Optibase

As filed with the Securities and Exchange Commission on March 30, 2017 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 20-F

As filed with the Securities and Exchange Commission on March 30, 2017 SECURITIES AND EXCHANGE COMMISSION Washington, D.

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.2 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2016, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 12.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Yakir Ben-Naim, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misle

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 12.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Amir Philips, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mislead

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Anual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2016, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our kn

Code of Business Conduct and Ethics, as last adopted by Optibase Ltd. Board of directors on September 5, 2016 (incorporated by reference to Exhibit 11.1 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2016)

Exhibit 11.1 OPTIBASE LTD. CODE OF BUSINESS CONDUCT AND ETHICS (as last adopted by the Company?s Board of Directors on September 5, 2016) Introduction This Code of Business Conduct and Ethics (the ?Code?) of Optibase Ltd. and any of its subsidiaries (the ?Company?) covers a wide range of business practices and procedures. It does not cover every issue that may arise, but it sets out basic principl

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: March 7, 2017 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) Ind

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: December 29, 2016 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices)

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 30, 2016 Commissi on File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 23, 2016 Commissi on File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamenofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 31, 2016 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive offices) I

Optibase 6-K (Current Report of Foreign Issuer)

zk1618594.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 1, 2016 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive

Optibase 6-K (Current Report of Foreign Issuer)

zk1618520.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 16, 2016 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 8 Hamanofim Street Herzliya 4672559, Israel +972-73-7073700 (Address of principal executive

Optibase 6-K (Current Report of Foreign Issuer)

zk1618484.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 9, 2016 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 15 Abba Even Street Herzliya 4672533, Israel +972-73-7073700 (Address of principal executive

Optibase 6-K (Current Report of Foreign Issuer)

zk1618303.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 1, 2016 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 15 Abba Even Street Herzliya 4672533, Israel +972-73-7073700 (Address of principal executi

Amended and Restated Limited Liability Company Agreement of 300 River Holdings LLC between Optibase Chicago, LLC and 300 River Plaza One LLC, dated December 28, 2015 (incorporated by reference to Exhibit 4.17 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2015).

EX-4.17 6 exhibit4-17.htm EXHIBIT 4.17 Exhibit 4.17 AMENDED AND RESTATED LIMITED LIABILITY COMPANY AGREEMENT OF 300 RIVER HOLDINGS LLC a Delaware limited liability company Dated as of December 28, 2015 TABLE OF CONTENTS I. DEFINED TERMS 1 1.01. Defined Terms 1 1.02. Construction 10 II. ORGANIZATION 11 2.01. Formation and Continuation 11 2.02. Name and Principal Place of Business. 11 2.03. Term 11

As filed with the Securities and Exchange Commission on March 31, 2016

As filed with the Securities and Exchange Commission on March 31, 2016 SECURITIES AND EXCHANGE COMMISSION Washington, D.

LOAN AGREEMENT

Exhibit 4.18 LOAN AGREEMENT THIS LOAN AGREEMENT (this “Agreement”), dated as of this 7 day of July, 2015, by and between OPTIBASE REAL ESTATE MIAMI, LLC, a Delaware limited liability company, whose address is 401 East Las Olas Boulevard, Suite 1400, Fort Lauderdale, Florida 33301, and CITY NATIONAL BANK OF FLORIDA, its successors and/or assigns, whose address is 25 West Flagler Street, Miami, Flor

Contribution Agreement between Optibase Chicago 300 LLC, 300 River Holdings LLC, 300 River Plaza One LLC and WKEM Riverside Member LLC, dated December 28, 2015 (incorporated by reference to Exhibit 4.16 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2015).

Exhibit 4.16 CONTRIBUTION AGREEMENT THIS CONTRIBUTION AGREEMENT (this ?Agreement?) is made and entered into as of the 28 day of December, 2015 (the ?Effective Date?), by and among 300 RIVER HOLDINGS LLC, a Delaware limited liability company (the ?Company?), 300 RIVER PLAZA ONE LLC, a Delaware limited liability company (the ?Mizrachi Member?), but solely with respect to Sections 1.3, 1.5, 3, 4.6, 7

Loan Agreement between Optibase Bavaria GmbH & Co KG, and Deutsche Genossenschafts-Hypothekenbank Aktiengesellschaft, dated May 4, 2015 (unofficial English translation) (incorporated by reference to Exhibit 4.14 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2015).

Exhibit 4.14 Agreement no.: 3301854000 LOAN AGREEMENT between Optibase Bavaria GmbH & Co KG, c/o McCafferty, Maximilianstraße 47, 80538 Munich, Germany (hereinafter referred to as the "Borrower") and Deutsche Genossenschafts-Hypothekenbank Aktiengesellschaft Postal address: Rosenstraße 2, 20095 Hamburg Sales tax ID no.: DE811141281 (hereinafter referred to as the "Bank") 1. Loan amount The Bank sh

CERTIFICATION OF CHIEF FINANCIAL OFFICER

Exhibit 12.2 CERTIFICATION OF CHIEF FINANCIAL OFFICER I, Yakir Ben-Naim, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misle

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-10840; 333-12814; 333-13186; 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated March 31, 2016, with respect to the consolidated financial statements of Optibase

Deed of Trust for Series A Bonds between Optibase Ltd. and Hermetic Trust (1975) Ltd., dated August 2, 2015 (unofficial English translation) (incorporated by reference to Exhibit 4.19 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2015).

Exhibit 4.19 Deed of Trust Signed on August 2, 2015 Between: Optibase Ltd. 10 Hasadnaut St., Herzliya Tel.: 073-7073700 Fax: 073-7946331 (hereinafter: the ?Company?) Of the first part; and between Hermetic Trusts (1975) Ltd. 113 Hayarkon Street, Tel Aviv Tel.: 03-5544553 Fax: 03-5271039 (hereinafter: the ?Trustee") Of the second part; Whereas On August 2, 2015, the Company?s board of directors app

Shareholders Agreement between The Phoenix Pension and Provident Fund Ltd., The Phoenix Insurance Company Ltd., and Optibase Ltd. Dated February 28, 2011 (incorporated by reference to Exhibit 4.13 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2015).

Exhibit 4.13 SHAREHOLDERS AGREEMENT Made and entered into on the 28th day of February, 2011 By and between 1. THE PHOENIX PENSION AND PROVIDENT FUND LTD. ON BEHALF OF AND IN THE NAME OF THE PHOENIX COMPREHENSIVE PENSION a company organized under the laws of the State of Israel C.N. 51- 1751513 (?Phoenix Pension?); and 2. THE PHOENIX INSURANCE COMPANY LTD., a company organized under the laws of the

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

Exhibit 12.1 CERTIFICATION OF CHIEF EXECUTIVE OFFICER I, Amir Philips, certify that: 1. I have reviewed this annual report on Form 20-F of Optibase Ltd. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not mislead

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2015, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

First Amendment to the Loan Agreement between Optibase Bavaria GmbH & Co KG, and Deutsche Genossenschafts-Hypothekenbank Aktiengesellschaft (dated May 4, 2015), dated November 10, 2015 (unofficial English translation) (incorporated by reference to Exhibit 4.15 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2015).

Exhibit 4.15 Contract number: 3226027500 LOAN AGREEMENT OF 4 MAY 2015 OVER EUR 21,000,000.00 ? FIRST AMENDMENT between Optibase Bavaria GmbH & Co KG c/o McCafferty, Maximilianstra?e 47, 80538 Munich, Germany (hereinafter referred to as the "Borrower") and Deutsche Genossenschafts-Hypothekenbank Aktiengesellschaft Sales tax ID no.: DE811141281 Postal address: Rosenstra?e 2, 20095 Hamburg (hereinaft

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.2 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2015, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

Optibase 6-K (Current Report of Foreign Issuer)

zk1618289.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: March 30, 2016 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 15 Abba Even Street Herzliya 4672533, Israel +972-73-7073700 (Address of principal execut

Optibase 6-K (Current Report of Foreign Issuer)

zk1617818.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: January 6, 2016 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 15 Abba Even Street Herzliya 4672533, Israel +972-73-7073700 (Address of principal execu

Optibase 6-K (Current Report of Foreign Issuer)

zk1517786.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: December 30, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 15 Abba Even Street Herzliya 4672533, Israel +972-73-7073700 (Address of principal exe

Optibase 6-K (Current Report of Foreign Issuer)

zk1517780.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: December 29, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 15 Abba Even Street Herzliya 4672533, Israel +972-73-7073700 (Address of principal exe

Optibase 6-K (Current Report of Foreign Issuer)

zk1517781.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: December 29, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 15 Abba Even Street Herzliya 4672533, Israel +972-73-7073700 (Address of principal exe

Optibase 6-K (Current Report of Foreign Issuer)

zk1517661.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 27, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal exe

Optibase 6-K (Current Report of Foreign Issuer)

zk1517644.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 24, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 46728, Israel +972-73-7073700 (Address of principal execu

Optibase 6-K (Current Report of Foreign Issuer)

zk1517550.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: November 9, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal exec

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 27, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executive offices)

Optibase 6-K (Current Report of Foreign Issuer)

zk1517198.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 10, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal execu

Optibase 6-K (Current Report of Foreign Issuer)

zk1517182.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 6, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal execut

Optibase 6-K (Current Report of Foreign Issuer)

zk1517134.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: August 2, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal execut

Optibase 6-K (Current Report of Foreign Issuer)

zk1517072.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: July 16, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executi

Optibase 6-K (Current Report of Foreign Issuer)

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: July 8, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executive offices) Ind

Optibase 6-K (Current Report of Foreign Issuer)

6-K 1 zk1517036.htm 6-K FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: July 8, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant’s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principa

Optibase 6-K (Current Report of Foreign Issuer)

zk1516904.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 3, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executiv

Optibase 6-K (Current Report of Foreign Issuer)

zk1516898.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 2, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executiv

Optibase 6-K (Current Report of Foreign Issuer)

zk1516897.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: June 2, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executiv

Optibase 6-K (Current Report of Foreign Issuer)

zk1516813.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 19, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executiv

Optibase 6-K (Current Report of Foreign Issuer)

zk1516773.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 13, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 46728, Israel +972-73-7073700 (Address of principal executive

Optibase 6-K (Current Report of Foreign Issuer)

zk1516708.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: May 6, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executive

Optibase 6-K (Current Report of Foreign Issuer)

zk1516623.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 22, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal execut

Optibase 6-K (Current Report of Foreign Issuer)

zk1516548.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 1, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executi

Optibase 6-K (Current Report of Foreign Issuer)

zk1516548.htm FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 Date of Report: April 1, 2015 Commission File No.: 000-29992 OPTIBASE LTD. (Translation of registrant?s name into English) 10 Hasadnaot Street Herzliya 4672837, Israel +972-73-7073700 (Address of principal executi

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of Optibase Ltd. (the "Company") on Form 20-F for the period ending December 31, 2014, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), the undersigned hereby certify that to the best of our k

Purchase and Sale Agreement between Optibase FMC, LLC and Flamingo South Acquisitions, LLC, dated September 16, 2014 (incorporated by reference to Exhibit 4.15 to the Registrant’s Annual Report on Form 20-F for the fiscal year ended December 31, 2014).

Exhibit 4.15 PURCHASE AND SALE AGREEMENT THIS PURCHASE AND SALE AGREEMENT (this “Agreement”) is made and entered into as of the “Effective Date” (defined below), by and between OPTIBASE FMC, LLC, a Florida limited liability company (the “Seller”), and FLAMINGO SOUTH ACQUISITIONS, LLC, a Delaware limited liability company (the “Purchaser”). In consideration of the mutual covenants and promises here

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the incorporation by reference in the Registration Statements (Form S-8 Files No. 333-10840; 333-12814; 333-13186; 333-91650; 333-122128; 333-137644; 333-139688; 333-148774; 333-198519) pertaining to Optibase Ltd. of our report, dated March 31, 2015, with respect to the consolidated financial statements of Optibase