Citadel Securities GP LLC and Kenneth Griffin Acquire 6.5% Stake in Medifast, Inc.

On May 15, 2026, Citadel Securities GP LLC, alongside Kenneth Griffin and other affiliated entities, filed a Schedule 13G regarding their holdings in Medifast, Inc. (MED). The filing reveals that Citadel Securities LLC beneficially owns 712,864 shares of common stock, while the broader group including Citadel Securities Group LP, Citadel Securities GP LLC, and Kenneth Griffin are deemed to beneficially own 715,910 shares. This collective ownership represents approximately 6.5% of the 11,031,693 shares outstanding as of March 23, 2026. The reporting persons share voting and dispositive power over these shares. The filing indicates that the securities were acquired in the ordinary course of business and not for the purpose of changing or influencing control of the issuer. This position marks a significant increase from the previously reported 0.0% ownership, establishing a substantial passive stake in the Baltimore-based nutrition and weight loss company. All reporting entities are organized in Delaware, with Kenneth Griffin holding a controlling interest.