Director — Beth J. Kaplan: The filing discloses the appointment of a director to a board committee, which is a routine governance action and not an executive departure.

Results of Operations and Financial Condition.” Such information (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Director — Bradley J. Gross: The resignation of a single director without any stated disagreement is a standard governance event with low market impact.

Director — Beth J. Kaplan: Appointment of Beth J. Kaplan as a director effective July 31, 2026.

CEO — Mark Penn: The CEO's employment agreement was amended to extend his term, increase his salary and bonuses, and grant additional stock appreciation rights.

Results of Operations and Financial Condition.” Such information (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Results of Operations and Financial Condition.” Such information (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Results of Operations and Financial Condition.” Such information (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Unregistered Sales of Equity Securities. On January 30, 2026, Stagwell Inc. (the “Company”) entered into an agreement (the “Agreement”) to purchase substantially all of the assets of a digital advertising company (the “Acquiree Company”) from the owners of the Acquiree Company (the “Sellers”). Pursuant to the Agreement, at closing of the transaction on January 30, 2026, the Company issued 863,624 shares of Class A common stock of the Company (“Stagwell Stock”) in payment of $5.625 million of…

Results of Operations and Financial Condition.” Such information (including Exhibit 99.1) shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Results of Operations and Financial Condition On July 31, 2025 , Stagwell Inc. (the “Company”) issued an earnings release reporting its financial results for the three and six months ended June 30, 2025. A copy of this earnings release is attached as Exhibit 99.1 hereto. Following the issuance of this earnings release, the Company will host an earnings call in which its financial results for the three and six months ended June 30, 2025 will be discussed. The investor presentation to be used f…

CFO — Ryan Greene: Ryan Greene was promoted from Chief Operating Officer to Chief Financial Officer.

The filing is about stockholder approval of an amended stock incentive plan, not a management change.

Results of Operations and Financial Condition On May 8, 2025 , Stagwell Inc. (the “Company”) issued an earnings release reporting its financial results for the three months ended March 31, 2025. A copy of this earnings release is attached as Exhibit 99.1 hereto. Following the issuance of this earnings release, the Company will host an earnings call in which its financial results for the three months ended March 31, 2025 will be discussed. The investor presentation to be used for the call is a…

Unregistered Sales of Equity Securities. On May 1, 2025, Stagwell Inc. (the “Company”) entered into an agreement (the “Agreement”) to purchase all of the equity interests in an experiential marketing company (the “Acquiree Company”) from the owners of the Acquiree Company (the “Sellers”). Pursuant to the Agreement, at closing of the transaction on May 1, 2025, the Company issued 2,017,857 shares of Class A common stock of the Company (“Stagwell Stock”) in payment of $11.3 million of the amoun…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The description of the Credit Agreement set forth above in

Entry into a Material Definitive Agreement. On April 23, 2025, certain subsidiaries of Stagwell Inc., a Delaware corporation (the “ Company ”), entered into the Second Amended and Restated Credit Agreement (the “ Second Amended and Restated Credit Agreement ”), by and among Stagwell Marketing Group LLC, Stagwell Global LLC and Maxxcom LLC (together, the “ Borrowers ”), the other Loan Parties, Lenders and Issuing Banks (each as defined therein) party thereto and JPMorgan Chase Bank, N.A., as A…

Results of Operations and Financial Condition On February 27, 2025, Stagwell Inc. (the “Company”) issued an earnings release reporting its financial results for the year ended December 31, 2024. A copy of this earnings release is attached as Exhibit 99.1 hereto. Following the issuance of this earnings release, the Company will host an earnings call in which its financial results for the year ended December 31, 2024 will be discussed. The investor presentation to be used for the call is attach…

Unregistered Sales of Equity Securities. On December 23, 2024, Stagwell Inc. (the “Company”) entered into an agreement (the “Agreement”) to purchase all of the equity interests in a digital strategy and communications company (the “Acquiree Company”) from the owners of the Acquiree Company (the “Sellers”). Pursuant to the Agreement, at closing of the transaction, the Company will issue up to $4.0 million in shares of Class A common stock of the Company (“Stagwell Stock”). In addition, pursuan…

Unregistered Sales of Equity Securities. On December 13, 2024, Stagwell Inc. (the “Company”) entered into an agreement (the “Agreement”) to purchase all of the shares in a global media monitoring and analytics company (the “Acquiree Company”) from the owner of the Acquiree Company (the “Seller”). Pursuant to the Agreement, in connection with the closing of the transaction on December 18, 2024, the Company issued 3,390,788 shares of Class A common stock of the Company (“Stagwell Stock”). In ad…

Results of Operations and Financial Condition On November 7, 2024, Stagwell Inc. (the “Company”) issued an earnings release reporting its financial results for the three and nine months ended September 30, 2024. A copy of this earnings release is attached as Exhibit 99.1 hereto. Following the issuance of this earnings release, the Company will host an earnings call in which its financial results for the three and nine months ended September 30, 2024 will be discussed. The investor presentatio…

Unregistered Sales of Equity Securities. On August 2, 2024, Stagwell Inc. (the “Company”) entered into an agreement (the “Agreement”) to purchase all of the equity interests in a government consulting, public policy and communications company (the “Acquiree Company”) from the owners of the Acquiree Company (the “Sellers”). Closing of the transaction is subject to regulatory approval and customary closing conditions. Pursuant to the Agreement, at closing of the transaction, the Company will is…

Results of Operations and Financial Condition On August 1, 2024, Stagwell Inc. (the “Company”) issued an earnings release reporting its financial results for the three and six months ended June 30, 2024. A copy of this earnings release is attached as Exhibit 99.1 hereto. Following the issuance of this earnings release, the Company will host an earnings call in which its financial results for the three and six months ended June 30, 2024 will be discussed. The investor presentation to be used f…

Unregistered Sales of Equity Securities. On July 19, 2024, Stagwell Inc. (the “Company”) entered into an agreement (the “Agreement”) to purchase all of the equity interests in a digital marketing company (the “Acquiree Company”) from the owners of the Acquiree Company (the “Sellers”). Pursuant to the Agreement, at closing of the transaction on July 19, 2024, the Company issued 135,010 shares of Class A common stock of the Company (“Stagwell Stock”). In addition, pursuant to the Agreement, the…

Other Events. On June 13, 2024, Stagwell Inc. (the “Company”) repurchased a total of 4,000,000 shares of the Company’s Class A common stock from certain affiliates of The Goldman Sachs Group, Inc. (“Goldman Sachs”) at a price of $6.34 per share, for an aggregate purchase price of $25,360,000. The purchase price represents an approximately 5% discount to the closing price of the Class A common stock on June 12, 2024. The repurchase was made in a privately negotiated transaction pursuant to the…