Pegasystems COO/CFO sells 39,627 shares at $35.77

PEGASYSTEMS’ COO and CFO, Kenneth Stillwell, sold 39,627 PEGA shares and now holds 95,225 shares directly, plus indirect holdings for his children.

Rhea-AI Filing Summary

PEGASYSTEMS INC (PEGA) reported that its COO and CFO, Kenneth Stillwell, sold 39,627 shares of common stock on September 11, 2026 in an open-market transaction at a weighted-average price of $35.7695 per share, with prices ranging from $35.74 to $35.835. After this sale, he directly holds 95,225 shares and indirectly holds 1,908 shares through his children. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Seller: 39,627 shares

Net Sell 2 txns

Insider STILLWELL KENNETH

Role COO, CFO

Sold 39,627 shs ($1.42M)

Type	Security	Shares	Price	Value
Sale	Common stock F1	39,627	$35.7695	$1.42M
holding	Common stock	--	--	--

Holdings After Transaction: Common stock — 95,225 shares (Direct); Common stock — 1,908 shares (Indirect, Reporting Person's children)

Footnotes (1)

1. F1. Represents the weighted average of sale prices, ranging from $35.7400 to $35.8350. The individual has provided the Company, and undertakes to provide to the staff of the Security and Exchange Commission or any security holder of the Company, upon request, full information regarding the number of shares sold at each separate price.

Key Figures

Shares sold: 39,627 shares Weighted-average sale price: $35.7695 per share Sale price range: $35.74 to $35.835 per share +3 more

6 metrics

Shares sold 39,627 shares Common stock sold by Kenneth Stillwell on September 11, 2026

Weighted-average sale price $35.7695 per share Weighted-average price for the 39,627 shares sold

Sale price range $35.74 to $35.835 per share Range of individual sale prices for the reported transaction

Direct holdings after transaction 95,225 shares PEGASYSTEMS INC common stock directly owned by Kenneth Stillwell after the sale

Indirect holdings after transaction 1,908 shares PEGASYSTEMS INC common stock indirectly held for the reporting person’s children

Net shares sold 39,627 shares Net-sell direction in the transaction summary

Key Terms

weighted average, open-market transaction, indirect ownership

3 terms

weighted average financial

"Represents the weighted average of sale prices, ranging from $35.7400"

A weighted average is a way of calculating an overall number when some items matter more than others by giving each item a different level of importance, or weight. Investors use weighted averages to combine figures like prices, returns or earnings so the result reflects the size or significance of each part — like grading a class where a final exam counts more than a quiz, producing a score that better represents true performance.

open-market transaction financial

"Sale in open market or private transaction"

An open-market transaction is a buy or sell of a company's shares or other securities conducted on a public exchange at the current market price, rather than through a private agreement. Investors watch these trades because they change the number of shares available and can move the price immediately—similar to how a large purchase at a busy store can raise demand and affect the checkout price—so such activity can signal market sentiment and alter ownership stakes.

indirect ownership financial

"ownership type recorded as indirect for shares held for his children"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did PEGA’s COO/CFO report on this Form 4?

The filing reports that COO and CFO Kenneth Stillwell sold 39,627 shares of PEGASYSTEMS INC common stock on September 11, 2026 in an open-market transaction.

At what price did the PEGA shares sell in Kenneth Stillwell’s September 11, 2026 transaction?

The shares were sold at a weighted-average price of $35.7695 per share. A footnote states that individual sale prices ranged from $35.7400 to $35.8350.

How many PEGA shares does Kenneth Stillwell hold after this reported sale?

After the sale, Kenneth Stillwell directly holds 95,225 shares of PEGASYSTEMS INC common stock. He also has indirect ownership of 1,908 shares held for his children.

Was Kenneth Stillwell’s PEGA share sale under a Rule 10b5-1 trading plan?

No. The Form 4 indicates the Rule 10b5-1 checkbox is not marked, and no Rule 10b5-1 trading plan is reported for this transaction.

What is the net number of PEGA shares sold by Kenneth Stillwell in this Form 4?

The transaction summary shows 39,627 shares sold and no purchases or exercises, resulting in net-sell activity of 39,627 shares of PEGASYSTEMS INC common stock.

How are the indirectly held PEGA shares described in this Form 4?

The Form 4 lists 1,908 shares of PEGASYSTEMS INC common stock as indirectly owned, with the nature of ownership described as the reporting person’s children.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/15/2026 - 04:21 PM Accepted by SEC EDGAR 09/15/2026 - 04:21 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

STILLWELL KENNETH

(Last) (First) (Middle)

C/O PEGASYSTEMS INC.

225 WYMAN STREET, STE 300

(Street)

WALTHAM MASSACHUSETTS 02451

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	COO, CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	09/11/2026		S		39,627	D	$35.7695(1)	95,225	D
Common stock								1,908	I	Reporting Person's children

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		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: 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

Explanation of Responses:

1. Represents the weighted average of sale prices, ranging from $35.7400 to $35.8350. The individual has provided the Company, and undertakes to provide to the staff of the Security and Exchange Commission or any security holder of the Company, upon request, full information regarding the number of shares sold at each separate price.

Remarks:

	/s/ Ewelina Kemp, Attorney-in-Fact for Kenneth Stillwell	09/15/2026
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)