Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF ☒ 1934 For the quarterly period ended March 31, 2024 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF ☐ 1934 For the transition period from ______________ to ______________ Commission File Number: 001-13718 Stagwell Inc. (Exact name of registrant as specified in its charter) Delaware 86-139 ...