Sec Form 4 Filing - Pruitt Gary E @ PS BUSINESS PARKS, INC./MD - 2022-01-26

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Pruitt Gary E 2. Issuer Name and Ticker or Trading Symbol PS BUSINESS PARKS, INC./MD [ PSB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O PS BUSINESS PARKS, INC., 701 WESTERN AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 01/26/2022 (Street) GLENDALE, CA91201 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 01/26/2022 M 10,703 A $ 60.66 22,703( 1 ) D Common Stock 01/26/2022 M 2,140 A $ 63.78 24,843( 1 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option (Right to Buy)( 2 ) $ 60.66 01/26/2022 M 10,703 02/21/2013 02/21/2022 Common Stock 10,703 $ 0 0 D Stock Option (Right to Buy)( 3 ) $ 63.78 01/26/2022 M 2,140 04/30/2013 04/30/2022 Common Stock 2,140 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Pruitt Gary E C/O PS BUSINESS PARKS, INC. 701 WESTERN AVENUE GLENDALE, CA91201 X Signatures Nathaniel A. Vitan, Attorney-in-Fact 01/28/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Includes 10,000 previously inadvertently omitted deferred stock units granted pursuant to the 2012 Equity and Performance-Based Incentive Compensation Plan. Deferred stock units vest in ten (10) equal annual installments over the duration of the reporting person's board service and are payable in shares of common stock upon retirement. ( 2 )Stock option granted pursuant to the 2003 Equity and Performance-Based Incentive Compensation Plan. Option vests in five (5) equal annual installments beginning one (1) year from the date of grant. ( 3 )Stock option granted pursuant to the 2012 Equity and Performance-Based Incentive Compensation Plan. Option vests in five (5) equal annual installments beginning one (1) year from the date of grant.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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