Mark Jeffery Penn - 03 Mar 2026 Form 4 Insider Report for Stagwell Inc (STGW)

Role: Chief Executive Officer, Director, 10%+ Owner
Signature: /s/ Mark Penn
Issuer symbol: STGW
Transactions as of: 03 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Mar 2026, 18:33:27 UTC
Previous filing: 05 Aug 2025
Next filing: 10 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Penn Mark Jeffery	Chief Executive Officer, Director, 10%+ Owner	C/O STAGWELL INC., ONE WORLD TRADE CENTER, FLOOR 65, NEW YORK	/s/ Mark Penn	05 Mar 2026	0001771735

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	STGW	Class A Common Stock	Disposed to Issuer		-57,689	-0.21%	$0.000000^*	27,502,741	03 Mar 2026	Direct	F1
transaction	STGW	Class A Common Stock	Tax liability		-229,529	-0.83%	$4.82^*	27,273,212	03 Mar 2026	Direct	F2
holding	STGW	Class A Common Stock						2,000,000	03 Mar 2026	See Footnote	F3

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

Explanation of Responses:

Id	Content
F1	Represents shares of restricted stock forfeited to the issuer in connection with the partial vesting of a three-year financial performance-based restricted stock award.
F2	Represents shares withheld by the issuer to satisfy tax withholding requirements on the nonreportable vesting of restricted stock.
F3	The 2,000,000 shares are held by The Stagwell Group LLC ("Stagwell Group") and were previously reported as directly beneficially owned by the Reporting Person. As reported in Amendment No. 18 to the Schedule 13D filed by the Reporting Person on January 13, 2026, on December 15, 2025, the Reporting Person transferred the shares to Stagwell Group. The Reporting Person is the controlling person of Stagwell Group.