PS Business Parks : Statement of Changes in Beneficial Ownership (Form 4)

Ownership Submission

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. 20549STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Rollo Robert S 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 (Month/Day/Year) (Street) GLENDALE CA 91201 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Join/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 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code 4. Securities Acquired (A) or Disposed of (D) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) 6. Ownership Form: Direct (D) or Indirect (I) 7. Nature of Indirect Beneficial Ownership Code V Amount (A) or (D) Price

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivate Security	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code	5. Number of Derivative Securities Acquired (A) or Disposed of (D)	6. Date Exercisable and Expiration Date	7. Title and Amount of Securities Underlying Derivative Security	8. Price of Derivative Security	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)	11. Nature of Indirect Beneficial Ownership
Code	V	(A)	(D)	Date Exercisable	Expriation Date	Title	Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
Director	10% Owner	Officer	Other
Rollo Robert S C/O PS BUSINESS PARKS, INC. 701 WESTERN AVENUE GLENDALE, CA91201	X

Signatures

/s/ Nathaniel A. Vitan, Attorney-in-Fact	2022-07-20
**Signature of Reporting Person	Date

Explanation of Responses:

(*)	If the form is filed by more than one reporting person, see Instruction 5(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).
(1)	Includes 10,000 previously inadvertently omitted deferred stock units granted under the Company's retirement plan for non-employee directors.
(2)	On July 20, 2022, pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated as of April 24, 2022, by and among PS Business Parks, Inc. (the "Company"), Sequoia Parent LP, Sequoia Merger Sub I LLC ("Merger Sub I"), Sequoia Merger Sub II LLC, and PS Business Parks, L.P., Merger Sub I merged with and into the Company (the "Company Merger") and each share of the Company's common stock, par value $0.01 per share ("common stock"), issued and outstanding immediately prior to the effective time of the Company Merger (the "Company Merger Effective Time"), other than certain shares of common stock excluded pursuant to the terms of the Merger Agreement, was automatically cancelled and converted into the right to receive an amount in cash equal to $182.25 per share (the "Per Company Share Merger Consideration"), without interest. [footnote continues in footnote 3 below]
(3)	The Per Company Share Merger Consideration represents $187.50 per share of common stock as reduced by the $5.25 per share closing cash dividend (the "Closing Cash Dividend") as described in Item 8.01 of the Company's Current Report on Form 8-K filed on July 8, 2022.
(4)	Pursuant to the Merger Agreement, at the Company Merger Effective Time, each award of deferred stock units (each, a "DSU award") granted under the Company's retirement plan for non-employee directors that was outstanding immediately prior to the Company Merger Effective Time became vested and was converted into a right to receive a cash payment in an amount equal to (i) the number of shares of common stock subject to the DSU award immediately prior to the Company Merger Effective Time multiplied by (ii) the Per Company Share Merger Consideration. In connection with the closing of the Company Merger, individuals holding DSU awards received an additional amount of cash consideration as a deemed dividend equivalent amount in an amount per DSU award equal to the Closing Cash Dividend.
(5)	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.
(6)	This option was previously reported as an option for 2,000 shares of common stock at an exercise price of $72.59, but, pursuant to anti-dilution provisions of PSB's 2012 Equity and Performance-Based Incentive Compensation Plan, was adjusted to reflect the special dividends declared by PSB on December 15, 2014 and December 1, 2021.
(7)	Pursuant to the Merger Agreement, at the Company Merger Effective Time, each option to purchase shares of common stock outstanding immediately prior to the Company Merger Effective Time was automatically cancelled in exchange for a cash payment in an amount equal to (i) the number of shares of common stock subject to the option immediately prior to the Company Merger Effective Time multiplied by (ii) the excess of the Per Company Share Merger Consideration over the per share exercise price of the option. In connection with the closing of the Company Merger, individuals holding options received an additional amount of cash consideration as a deemed dividend equivalent amount in an amount per option equal to the Closing Cash Dividend.
(8)	This option was previously reported as an option for 2,000 shares of common stock at an exercise price of $82.84, of which 1,200 were previously exercised, but, pursuant to anti-dilution provisions of the Company's 2012 Equity and Performance-Based Incentive Compensation Plan, was adjusted to reflect the special dividend declared by the Company on December 1, 2021.
(9)	This option was previously reported as an option for 2,000 shares of common stock at an exercise price of $80.13, of which 800 were previously exercised, but, pursuant to anti-dilution provisions of the Company's 2012 Equity and Performance-Based Incentive Compensation Plan, was adjusted to reflect the special dividend declared by the Company on December 1, 2021.
(10)	This option was previously reported as an option for 2,000 shares of common stock at an exercise price of $96.89, of which 400 were previously exercised, but, pursuant to anti-dilution provisions of the Company's 2012 Equity and Performance-Based Incentive Compensation Plan, was adjusted to reflect the special dividend declared by the Company on December 1, 2021.
(11)	This option was previously reported as an option for 2,000 shares of common stock at an exercise price of $121.57, but, pursuant to anti-dilution provisions of the Company's 2012 Equity and Performance-Based Incentive Compensation Plan, was adjusted to reflect the special dividend declared by the Company on December 1, 2021.
(12)	This option was previously reported as an option for 2,000 shares of common stock at an exercise price of $115.45, but, pursuant to anti-dilution provisions of the Company's 2012 Equity and Performance-Based Incentive Compensation Plan, was adjusted to reflect the special dividend declared by the Company on December 1, 2021.
(13)	This option was previously reported as an option for 2,000 shares of common stock at an exercise price of $149.02, but, pursuant to anti-dilution provisions of the Company's 2012 Equity and Performance-Based Incentive Compensation Plan, was adjusted to reflect the special dividend declared by the Company on December 1, 2021.
(14)	This option was previously reported as an option for 2,000 shares of common stock at an exercise price of $127.22, but, pursuant to anti-dilution provisions of the Company's 2012 Equity and Performance-Based Incentive Compensation Plan, was adjusted to reflect the special dividend declared by the Company on December 1, 2021.
(15)	This option was previously reported as an option for 2,000 shares of common stock at an exercise price of $163.49, but, pursuant to anti-dilution provisions of the Company's 2012 Equity and Performance-Based Incentive Compensation Plan, was adjusted to reflect the special dividend declared by the Company on December 1, 2021.

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