Polar Asset Management Partners Inc. Increases Stake in GP-Act III Acquisition Corp to 11.1%

On June 4, 2026, Polar Asset Management Partners Inc. filed a Schedule 13G regarding its holdings in GP-Act III Acquisition Corp (GPAT). The filing reveals that as of May 31, 2026, the Ontario-based investment advisor beneficially owns 1,800,000 Class A ordinary shares, representing an 11.1% ownership stake in the company. This marks a significant increase from its previously reported position of 1,174,996 shares. Polar Asset Management Partners Inc. serves as the investment advisor to the Polar Multi-Strategy Master Fund, which directly holds the shares. The reporting person maintains sole voting and dispositive power over the entire 1,800,000 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. The total value of the current position is estimated at approximately $19.49 million based on the provided filing data.