Pegasystems officer plans sale of 1,063 shares

An officer of PEGASYSTEMS INC filed a Rule 144 notice to sell 1,063 shares of PEGA common stock tied to option exercise, following several smaller sales in the prior three months.

Rhea-AI Filing Summary

PEGASYSTEMS INC (PEGA) received a notice that officer Efstathios A. Kouninis plans to sell common stock under Rule 144. The filing covers a proposed sale of 1,063 shares of common stock on or after September 3, 2026, through Morgan Stanley Smith Barney LLC Executive Financial Services.

The planned sale is tied to an exercise of options under a registered plan, with the issuer listed as the source of the shares and cash as the payment method. Over the prior three months, Kouninis reported additional Rule 144 sales of PEGASYSTEMS INC common stock on June 16, August 7, August 10, and August 31, 2026.

Key Figures

Planned shares to be sold: 1,063 shares Past sale on August 31, 2026: 1,012 shares; $36,938.00 Past sale on August 10, 2026: 860 shares; $28,466.00 +3 more

6 metrics

Planned shares to be sold 1,063 shares Common stock proposed for sale under Rule 144 on or after September 3, 2026

Past sale on August 31, 2026 1,012 shares; $36,938.00 Common stock sold by Efstathios A. Kouninis

Past sale on August 10, 2026 860 shares; $28,466.00 Common stock sold by Efstathios A. Kouninis

Past sale on August 7, 2026 860 shares; $27,778.00 Common stock sold by Efstathios A. Kouninis

Past sale on June 16, 2026 750 shares; $24,235.35 Common stock sold by Efstathios A. Kouninis

Issuer phone number 6173749600 Contact phone for PEGASYSTEMS INC

Key Terms

Rule 144, Exercise of Options Under a Registered Plan, Executive Financial Services

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Exercise of Options Under a Registered Plan financial

"Common | 09/03/2026 | Exercise of Options Under a Registered Plan | Issuer"

Executive Financial Services financial

"Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza"

FAQ

What does the Form 144 filing disclose for PEGASYSTEMS INC (PEGA)?

It discloses that officer Efstathios A. Kouninis intends to sell 1,063 shares of PEGASYSTEMS INC common stock under Rule 144 on or after September 3, 2026, following an exercise of options under a registered plan.

How many PEGA shares does Efstathios A. Kouninis plan to sell in this notice?

The notice covers a proposed sale of 1,063 shares of PEGASYSTEMS INC common stock. The shares are to be sold through Morgan Stanley Smith Barney LLC Executive Financial Services in connection with an exercise of options under a registered plan dated September 3, 2026.

What prior sales of PEGA stock are reported in the last three months?

The filing lists four prior sales by Efstathios A. Kouninis: 750 shares on June 16, 2026 for $24,235.35; 860 shares on August 7, 2026 for $27,778.00; 860 shares on August 10, 2026 for $28,466.00; and 1,012 shares on August 31, 2026 for $36,938.00.

How are the new PEGA shares being acquired before sale under this Form 144?

The 1,063 shares covered by the notice are to be acquired through an exercise of options under a registered plan, with the issuer listed as the source of the shares and cash as the consideration for the option exercise.

Which broker is handling the planned Rule 144 sale for PEGA shares?

The planned Rule 144 sale of 1,063 PEGASYSTEMS INC shares will be handled by Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004, according to the filing details.

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

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Available on EDGAR 09/03/2026 - 04:35 PM Accepted by SEC EDGAR 09/03/2026 - 04:16 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001353196
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	PEGASYSTEMS INC.
SEC File Number	001-11859
Address of Issuer	225 WYMAN STREET STE 300 WALTHAM MASSACHUSETTS 02451-1293
Phone	6173749600
Name of Person for Whose Account the Securities are To Be Sold	EFSTATHIOS A KOUNINIS
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	1063	41191.25	164404945	09/03/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/03/2026	Exercise of Options Under a Registered Plan	Issuer			1063	09/03/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
EFSTATHIOS A KOUNINIS 225 Wyman Street Waltham MA 02451	Common	08/31/2026	1012	36938.00
EFSTATHIOS A KOUNINIS 225 Wyman Street Waltham MA 02451	Common	08/10/2026	860	28466.00
EFSTATHIOS A KOUNINIS 225 Wyman Street Waltham MA 02451	Common	08/07/2026	860	27778.00
EFSTATHIOS A KOUNINIS 225 Wyman Street Waltham MA 02451	Common	06/16/2026	750	24235.35

144: Remarks and Signature

Remarks
Date of Notice	09/03/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Efstathios Kouninis
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)