Jane Street Group, LLC Increases Stake in Alpha Compute Corp (ATON) to 5.6%

On June 16, 2026, Jane Street Group, LLC filed a Schedule 13G with the SEC, reporting a significant increase in its position in Alpha Compute Corp (Ticker: ATON). As of the event date on June 11, 2026, Jane Street Group, LLC, along with its subsidiaries Jane Street Capital, LLC and Jane Street Global Trading, LLC, reported beneficial ownership of 1,350,921 ordinary shares. This represents a 5.6% ownership stake in the company, a substantial rise from the previously reported 11,381 shares. The filing indicates that Jane Street Group, LLC holds shared voting and dispositive power over the total 1,350,921 shares. Specifically, Jane Street Capital, LLC beneficially owns 510,555 shares (2.1%), while Jane Street Global Trading, LLC owns 840,366 shares (3.5%). The securities were acquired in the ordinary course of business and not for the purpose of influencing or changing control of the issuer. This move marks Jane Street's emergence as a major passive institutional investor in Alpha Compute Corp.