Efstathios A. Kouninis - 05 Mar 2026 Form 4 Insider Report for PEGASYSTEMS INC (PEGA)

Role: SVP, Chief Accounting Officer
Signature: /s/ Ewelina Kemp, Attorney-in-Fact for Efstathios A. Kouninis
Issuer symbol: PEGA
Transactions as of: 05 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 09 Mar 2026, 16:24:07 UTC
Previous filing: 05 Mar 2026
Next filing: 10 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
KOUNINIS EFSTATHIOS A	SVP, Chief Accounting Officer	C/O PEGASYSTEMS INC., 225 WYMAN STREET, STE 300, WALTHAM	/s/ Ewelina Kemp, Attorney-in-Fact for Efstathios A. Kouninis	09 Mar 2026	0001353196

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PEGA	Common stock	Options Exercise		+440	+12%	$0.000000^*	4,222	05 Mar 2026	Direct	F1
transaction	PEGA	Common stock	Tax liability		-108	-2.6%	$47.05^*	4,114	05 Mar 2026	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	PEGA	Restricted Stock Units	Options Exercise		-440	-11%	$0.000000^*	3,522	05 Mar 2026	Common stock	440	$0.000000	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit represents the right to receive, following vesting, one share of common stock.
F2	25% of the restricted stock units vest on the Date Exercisable in Table II, and the remaining 75% vest in equal quarterly installments over the following three years.