X0609 4 2026-06-12 0 0001748824 Acadian Asset Management Inc. AAMI 0001394923 Paulson John false C/O ACADIAN ASSET MANAGEMENT INC. 200 STATE STREET, SUITE 601A BOSTON MA 02109 1 0 1 0 0 Restricted Stock Units 2026-06-12 4 A 0 2253 0 A Common Stock 2253 2253 D Each restricted stock unit represents a right to receive one share of common stock of Acadian Asset Management Inc. Consists of restricted stock units under the Acadian Asset Management Inc. 2026 Equity Incentive Plan. On June 12, 2026, the reporting person was granted 2,253 restricted stock units vesting upon the earlier of June 12, 2027 and the date of the 2027 annual meeting of stockholders of Acadian Asset Management Inc. /s/ Richard J. Hart, By POA for John Paulson 2026-06-15