Pegasystems: Alan Trefler reports 47.8% stake

Equity compensation awards representing 2,055,678 shares were included because Trefler could acquire them within 60 days through vesting or exercise.

Available on EDGAR 10/30/2026 - 04:07 PM EDT Accepted by SEC EDGAR 10/30/2026 - 04:07 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Pegasystems Inc. reports that Alan Trefler beneficially owned 79,095,963 shares of common stock, or 47.8% of the class, as of September 30, 2026. Trefler had sole voting and dispositive power over 60,560,550 shares and shared voting and dispositive power over 18,535,413 shares.

The sole-power amount includes 58,504,872 shares held individually and 2,055,678 shares Trefler could acquire within 60 days through vesting or exercise of equity compensation awards. The shared-power amount covers shares held through two trusts and the Trefler Foundation; Trefler had no pecuniary interest in the Foundation shares.

Key Figures

Beneficial ownership: 79,095,963 shares Percent of class: 47.8% Sole voting and dispositive power: 60,560,550 shares +3 more

6 metrics

Beneficial ownership 79,095,963 shares As of September 30, 2026

Percent of class 47.8% As of September 30, 2026

Sole voting and dispositive power 60,560,550 shares As of September 30, 2026

Shared voting and dispositive power 18,535,413 shares As of September 30, 2026

Shares held individually 58,504,872 shares Included in the sole-power amount

Shares Trefler could acquire 2,055,678 shares Within 60 days through vesting or exercise of equity compensation awards

Key Terms

beneficially owned, sole voting power, shared voting power, dispositive power, +1 more

5 terms

beneficially owned financial

"Amount beneficially owned: 79095963"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Sole Voting Power 60,560,550.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

shared voting power financial

"Shared Voting Power 18,535,413.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

dispositive power financial

"Sole Dispositive Power 60,560,550.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

pecuniary interest financial

"has no pecuniary interest in these shares"

FAQ

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

How many PEGA shares did Alan Trefler report owning?

Alan Trefler reported beneficial ownership of 79,095,963 Pegasystems common shares, or 47.8% of the class, as of September 30, 2026. He had sole voting and dispositive power over 60,560,550 shares and shared power over 18,535,413 shares.

Which entities held shares subject to Alan Trefler's shared voting power?

Shared power included 16,275,828 shares held by the Alan N. Trefler Irrevocable Non-GST Trust of 2022, 188,000 shares held by the Trefler Foundation, and 2,071,585 shares held by The Trefler 2025 Trust. Daniel Sherman and Pamela Trefler are trustees of the 2022 trust. Goldman Sachs Trust Company of Delaware is the administrative trustee of The Trefler 2025 Trust. Trefler can appoint and remove trustees of both trusts and distribution advisors of The Trefler 2025 Trust; he shares voting and dispositive power over the Foundation shares but has no pecuniary interest in them.

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

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 27)

Pegasystems Inc.

(Name of Issuer)

Common Stock, $.01 par value per share

(Title of Class of Securities)

705573103

(CUSIP Number)

09/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 705573103

1

Names of Reporting Persons

ALAN TREFLER

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 60,560,550.00
6	Shared Voting Power 18,535,413.00
7	Sole Dispositive Power 60,560,550.00
8	Shared Dispositive Power 18,535,413.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

79,095,963.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

47.8 %

12

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person: Sole voting and dispositive power consists of (1) 58,504,872 shares of Common Stock held by Mr. Trefler, individually; and (2) 2,055,678 shares that Mr. Trefler has the right to acquire within 60 days of September 30, 2026 through the vesting or exercise of equity compensation awards. Shared voting and dispositive power consists of (1) 16,275,828 shares held by the Alan N. Trefler Irrevocable Non-GST Trust of 2022, of which Daniel Sherman and Pamela Trefler are the trustees and of which Mr. Trefler has ability to appoint and remove trustees; (2) 188,000 shares held by the Trefler Foundation, of which Mr. Trefler is a trustee and shares voting and dispositive power over these shares, but has no pecuniary interest in these shares; and (3) 2,071,585 shares held by The Trefler 2025 Trust, of which Goldman Sachs Trust Company of Delaware is the administrative trustee and of which Mr. Trefler has ability to appoint and remove trustees and distribution advisors.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Pegasystems Inc.
(b)	Address of issuer's principal executive offices: 225 Wyman Street, Ste 300, Waltham, Massachusetts, 02451
Item 2.
(a)	Name of person filing: Alan Trefler
(b)	Address or principal business office or, if none, residence: c/o Pegasystems Inc., 225 Wyman Street, Ste 300, Waltham, MA 02451
(c)	Citizenship: United States
(d)	Title of class of securities: Common Stock, $.01 par value per share
(e)	CUSIP No.: 705573103
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 79095963
(b)	Percent of class: 47.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 60560550
	(ii) Shared power to vote or to direct the vote: 18535413
	(iii) Sole power to dispose or to direct the disposition of: 60560550
	(iv) Shared power to dispose or to direct the disposition of: 18535413
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

ALAN TREFLER

Signature:	/s/ Alan Trefler
Name/Title:	Alan Trefler
Date:	10/30/2026