Pegasystems officer plans sale of 982 shares

An officer of PEGASYSTEMS INC filed Form 144 for a planned sale of 982 common shares, following several open-market sales over the prior three months.

Rhea-AI Filing Summary

PEGASYSTEMS INC (PEGA) received a Form 144 notice from officer Efstathios A. Kouninis covering a proposed sale of 982 shares of common stock through Morgan Stanley Smith Barney LLC, with an indicated value of $36,677.70 as of September 16, 2026 on NASDAQ.

The notice also lists multiple restricted stock vesting events under a registered plan in early September 2026 and details several prior open-market sales by Kouninis over the preceding three months.

Key Figures

Shares in proposed sale: 982 shares Indicated value of proposed sale: $36,677.70 Sale on September 3, 2026: 1,063 shares; $41,191.25 +4 more

7 metrics

Shares in proposed sale 982 shares Common stock proposed for sale as of September 16, 2026

Indicated value of proposed sale $36,677.70 Value associated with 982 PEGASYSTEMS INC shares as of September 16, 2026

Sale on September 3, 2026 1,063 shares; $41,191.25 Common stock sold by Efstathios A. Kouninis during past three months

Sale on August 31, 2026 1,012 shares; $36,938.00 Common stock sold by Efstathios A. Kouninis during past three months

Sale on August 10, 2026 860 shares; $28,466.00 Common stock sold by Efstathios A. Kouninis during past three months

Sale on August 7, 2026 860 shares; $27,778.00 Common stock sold by Efstathios A. Kouninis during past three months

Sale on June 16, 2026 750 shares; $24,235.35 Common stock sold by Efstathios A. Kouninis during past three months

Key Terms

Form 144, Rule 144, restricted stock, registered plan, +1 more

5 terms

Form 144 regulatory

"Name of Person for Whose Account the Securities are To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

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.

restricted stock financial

"Restricted Stock Vesting Under a Registered Plan"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

registered plan financial

"Restricted Stock Vesting Under a Registered Plan"

A registered plan is a savings or investment account that a government recognizes for special tax treatment and rules, such as limits on how much you can put in and conditions for withdrawals. For investors it matters because those rules change how much of your gains are taxed, how quickly your money can be accessed and what strategies make sense — like a labeled jar that gives tax breaks but comes with rules about when and how you can take the money out.

securities to be sold financial

"144: Securities To Be Sold"

FAQ

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

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

The filing discloses that officer Efstathios A. Kouninis has notified of a proposed sale of 982 shares of PEGASYSTEMS INC common stock through Morgan Stanley Smith Barney LLC, with an indicated value of $36,677.70 as of September 16, 2026.

How many PEGASYSTEMS INC (PEGA) shares are covered by the new Form 144 notice?

The notice covers a proposed sale of 982 shares of PEGASYSTEMS INC common stock, associated with a value of $36,677.70 and listed for NASDAQ as of September 16, 2026.

What recent PEGASYSTEMS INC (PEGA) share sales by Efstathios Kouninis are reported?

Over the past three months, Kouninis is reported to have sold 1,063 shares for $41,191.25 on September 3, 2026, 1,012 shares for $36,938.00 on August 31, 2026, and several smaller trades in August and June 2026.

Are the PEGASYSTEMS INC (PEGA) shares in the Form 144 linked to restricted stock vesting?

Yes. The filing lists multiple entries for restricted stock vesting under a registered plan dated September 1, 4, 5, and 7, 2026, each showing PEGASYSTEMS INC as the issuer and specific share amounts tied to each vesting date.

Which broker is named for the planned PEGASYSTEMS INC (PEGA) share sale?

The proposed sale of 982 shares of PEGASYSTEMS INC common stock is to be handled through Morgan Stanley Smith Barney LLC Executive Financial Services, listed at 1 New York Plaza, New York, NY.

On which market is the PEGASYSTEMS INC (PEGA) sale in the Form 144 noted?

The Form 144 notes that the proposed sale of 982 PEGASYSTEMS INC common shares through Morgan Stanley Smith Barney LLC is associated with trading on NASDAQ as of September 16, 2026.

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

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Available on EDGAR 09/16/2026 - 04:03 PM Accepted by SEC EDGAR 09/16/2026 - 04:02 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	982	36677.70	164404945	09/16/2026	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	09/01/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			155	09/01/2026	Not Applicable
Common	09/04/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			243	09/04/2026	Not Applicable
Common	09/05/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			332	09/05/2026	Not Applicable
Common	09/07/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			252	09/07/2026	Not Applicable

* 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	09/03/2026	1063	41191.25
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	09/16/2026
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)