Mark Jeffery Penn - 09 Aug 2026 Form 4 Insider Report for Stagwell Inc (STGW)

Reporting relationship: Chief Executive Officer, Director, 10%+ Owner
Issuer ticker: STGW
Reported as of: 09 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 11 Aug 2026, 20:14:42 UTC
Prior SEC filing: 03 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Mark Penn

Key filing fact

Mark Jeffery Penn filed Form 4 for Stagwell Inc (STGW) on 11 Aug 2026.

Key facts

This page summarizes Mark Jeffery Penn's Form 4 filing for Stagwell Inc (STGW).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 11 Aug 2026, 20:14.

Change

Previous filing in this sequence was filed on 03 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001771735 Primary reporting owner

Penn Mark Jeffery

Relationship: Chief Executive Officer, Director, 10%+ Owner
Address: C/O STAGWELL INC., ONE WORLD TRADE CENTER, FLOOR 65, NEW YORK
Signature: /s/ Mark Penn
Signature date: 11 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

STGW transaction

Class A Common Stock

Options Exercise

Transaction value
Shares: +500,000
Change %: +2.2%
Price: $8.27^*
Shares after: 23,534,990
Date: 09 Aug 2026
Ownership: Direct
Footnotes: F1

STGW transaction

Class A Common Stock

Disposed to Issuer

Transaction value
Shares: -500,000
Change %: -2.1%
Price: $9.17^*
Shares after: 23,034,990
Date: 09 Aug 2026
Ownership: Direct
Footnotes: F1

STGW transaction

Class A Common Stock

Options Exercise

Transaction value
Shares: +75,000
Change %: +0.33%
Price: $6.79^*
Shares after: 23,109,990
Date: 09 Aug 2026
Ownership: Direct
Footnotes: F1

STGW transaction

Class A Common Stock

Disposed to Issuer

Transaction value
Shares: -75,000
Change %: -0.32%
Price: $9.17^*
Shares after: 23,034,990
Date: 09 Aug 2026
Ownership: Direct
Footnotes: F1

STGW holding

Class A Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,000,000
Date: 09 Aug 2026
Ownership: See Footnote
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

STGW transaction Derivative

Stock Appreciation Rights

Options Exercise

Transaction value
Shares: -500,000
Change %: -33%
Price: $0.000000^*
Shares after: 1,000,000
Date: 09 Aug 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 500,000
Exercise price: $8.27
Footnotes: F1, F3

STGW transaction Derivative

Stock Appreciation Rights

Options Exercise

Transaction value
Shares: -75,000
Change %: -33%
Price: $0.000000^*
Shares after: 150,000
Date: 09 Aug 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 75,000
Exercise price: $6.79
Footnotes: F1, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Represents the exercise of Stock Appreciation Rights ("SARs") and settlement for cash.

Footnote F2

The shares are held by The Stagwell Group LLC ("Stagwell Group"). The Reporting Person is the controlling person of Stagwell Group.

Footnote F3

The SARs vested in equal installments on December 14, 2022, December 14, 2023 and December 14, 2024.

Footnote F4

The SARs vested in equal installments on March 1, 2024, March 1, 2025 and March 1, 2026.