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

Ameriprise Financial, Inc. (AFI) filed a Schedule 13G/A on May 15, 2026, disclosing a significant position in GCM Grosvenor Inc. (GCMG). As of the event date on March 31, 2026, AFI reported beneficial ownership of 5,294,501 shares of Class A Common Stock, representing an 8.7% ownership stake. This filing marks a substantial increase from the previously reported 0.0% ownership. The ownership is shared among several entities: AFI, acting as a parent holding company; Columbia Management Investment Advisers, LLC (CMIA), serving as the investment adviser; and the Columbia Acorn Fund. Specifically, CMIA is deemed to beneficially own 5,276,828 shares, while the Columbia Acorn Fund directly holds 4,428,750 shares (7.3% of the class). The reporting persons certified that the securities 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.