Ameriprise Financial Reports 8.7% Stake in GCM Grosvenor Inc. via Columbia Management Subsidiary

Ameriprise Financial, Inc. (AFI) filed a Schedule 13G/A on May 15, 2026, reporting a beneficial ownership of 5,294,501 shares of Class A Common Stock in GCM Grosvenor Inc. (GCMG). This represents an 8.7% ownership stake in the company. The filing is a joint submission involving AFI, its subsidiary Columbia Management Investment Advisers, LLC (CMIA), and the Columbia Acorn Fund. CMIA, acting as the investment adviser, is deemed to beneficially own 5,276,828 shares, while the Columbia Acorn Fund specifically holds 4,428,750 shares, or approximately 7.3% of the class. AFI, as the parent holding company of CMIA, reports the aggregate total. The reporting persons indicated that the shares were acquired in the ordinary course of business and not for the purpose of influencing or changing the control of the issuer. Both AFI and CMIA disclaim beneficial ownership of the reported shares except to the extent of their pecuniary interest therein.