Stagwell shareholders approve 2023 ESPP, re-elect all directors at annual meeting

Proposal 5 – Ratification of Selection of Independent Registered Public Accounting Firm. The stockholders ratified the selection of PricewaterhouseCoopers LLP to act as the independent registered public accounting firm of the Company for the fiscal year ending December 31, 2023 by the votes shown below. For Against Abstain 285,259,338 2,211,958 3,957

Proposal 4 – Frequency of Advisory Votes on Executive Compensation. The stockholders cast votes on the non-binding advisory proposal on the frequency of future advisory votes on executive compensation in the amounts shown below. Consistent with these voting results and the recommendation of the Company’s board of directors, the Company’s board of directors has determined that the Company will hold an advisory vote to approve executive compensation every year until the next required advisory vote on the frequency of such a vote. One Year Two Years Three Years Abstain Broker Non-Votes 265,749,627 6,235 1,040,662 125,153 20,553,576

Proposal 1 - Election of Directors. The stockholders elected the nominees for director by the votes shown below, each to hold office until the Company’s 2024 Annual Meeting of Stockholders. Nominee For Withheld Broker Non-Votes Charlene Barshefsky 261,540,602 5,381,075 20,553,576 Bradley J. Gross 266,132,757 788,920 20,553,576 Wade Oosterman 260,614,729 6,306,948 20,553,576 Mark J. Penn 266,255,460 666,217 20,553,576 Desirée Rogers 266,191,970 729,707 20,553,576 Eli Samaha 261,540,602 5,381,075 20,553,576 Irwin D. Simon 250,048,715 16,872,962 20,553,576 Rodney Slater 261,995,048 4,926,629 20,553,576 Brandt Vaughan 266,271,947 649,730 20,553,576

Proposal 3 - Executive Compensation. The stockholders approved, on a non-binding, advisory basis, the 2022 executive compensation of the Company’s named executive officers by the votes shown below. For Against Abstain Broker Non-Votes 266,035,944 494,320 391,413 20,553,576

Proposal 2 – Approval of 2023 Employee Stock Purchase Plan. The stockholders approved the 2023 Employee Stock Purchase Plan by the votes shown below. For Against Abstain Broker Non-Votes 264,374,119 2,542,655 4,903 20,553,576