Ameriprise Financial Reports 5.4% Stake in Pasithea Therapeutics Corp (KTTA) via 13G/A Filing

On May 15, 2026, Ameriprise Financial, Inc. (AFI) filed a Schedule 13G/A with the SEC, reporting a significant increase in its stake in Pasithea Therapeutics Corp (KTTA). As of the event date of March 31, 2026, AFI, along with its subsidiary Columbia Management Investment Advisers, LLC (CMIA), reported beneficial ownership of 1,350,896 shares of Common Stock. This position represents approximately 5.4% of the company's total shares outstanding. This filing reflects a substantial increase from a previous position of 0.0%, marking a new material holding for the reporting persons. AFI, acting as a parent holding company, and CMIA, an investment adviser, share voting and dispositive power over the reported shares. The filing was made under Rule 13d-1(b), indicating that the securities were acquired in the ordinary course of business and not with the intent to influence or change the control of the issuer. Both entities have disclaimed beneficial ownership of the reported shares except to the extent of their pecuniary interest therein.