PEGA Pegasystems Inc

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 OF SECURITIES                                                                                   
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940                       

1. Name and Address of Reporting Person * Stafford Hayden	2. Issuer Name and Ticker or Trading Symbol PEGASYSTEMS INC [ PEGA ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) President
(Last)          (First)          (Middle) C/O PEGASYSTEMS INC, ONE MAIN STREET	3. Date of Earliest Transaction (MM/DD/YYYY) 10/1/2021
(Street) CAMBRIDGE, MA 02142 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	10/1/2021		M		1470 (1)	A	$0	7334	D
Common stock	10/1/2021		F		630	D	$127.10	6704 (2)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		7. Title and Amount of Securities Underlying Derivative Security (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
Restricted Stock Units (3)	$0.0	10/1/2021		M			1470	10/1/2020 (1)	(4)	Common stock	1470.0	$0	22050	D

Explanation of Responses:
(1)	Represents a 5% vesting on October 1, 2021. The original grant was 29,404 restricted stock units. The remaining 75% will vest in 5% quarterly installments, until the grant is fully vested July 1, 2025.
(2)	Does not include shares of common stock subject to unvested restricted stock units and/or options awards.
(3)	Each restricted stock unit represents the right to receive, following vesting, one share of the issuer's common stock.
(4)	Once vested, the shares of common stock are not subject to expiration.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Stafford Hayden C/O PEGASYSTEMS INC ONE MAIN STREET CAMBRIDGE, MA 02142			President

Signatures
/s/ Donald L. Lancaster, Attorney-in-Fact for Hayden Stafford		10/5/2021
**Signature of Reporting Person		Date