Jane Street Group Reports 8.5% Stake in Super Micro Computer, Inc. (SMCI)

On June 18, 2026, Jane Street Group, LLC filed a Schedule 13G/A with the SEC, reporting a significant new ownership stake in Super Micro Computer, Inc. (SMCI). The filing reveals that Jane Street Group, along with its subsidiaries Jane Street Capital, LLC, Jane Street Global Trading, LLC, and Jane Street Singapore Pte. Ltd, collectively beneficially own 56,635,790 shares of common stock. This represents an 8.5% ownership stake in the company. The reported holdings include 18,182,400 shares underlying Series A Mandatory Convertible Preferred Stock held by Jane Street Global Trading, LLC. Individually, Jane Street Global Trading holds a 6.2% stake (40,895,776 shares), while Jane Street Capital holds 2.4% (15,728,196 shares). This amendment was specifically filed to correct an error in the signature block of a previous filing, with no other changes to the disclosed information. The calculation is based on approximately 665 million outstanding shares, accounting for potential dilution from the convertible securities.