Jane Street Group, LLC and affiliated entities filed Amendment No. 3 to Schedule 13G with the SEC on November 6, 2026, disclosing their beneficial ownership positions in Super Micro Computer, Inc. as of September 30, 2026.

Key Highlights

  • Aggregate beneficial ownership: Jane Street Group, LLC reported 22,895,125 shares beneficially owned, representing 3.4% of the class.
  • Convertible Preferred Stock component: The reported holding includes 14,221,486 shares that can be acquired from Depositary Shares each representing a 1/20th interest in a share of 7.00% Series A Mandatory Convertible Preferred Stock held by Jane Street Global Trading, LLC.
  • Voting power: All 22,895,125 shares are held with shared voting power; sole voting power is reported as zero.
  • Jane Street Capital, LLC stake: This entity separately reported 7,365,495 shares beneficially owned, representing 1.1% of the class.
  • Jane Street Global Trading, LLC stake: This entity reported 15,529,630 shares beneficially owned, representing 2.3% of the class.
  • Share count basis: The percent-of-class calculations use 671,186,870 outstanding shares, derived from 656,965,384 shares outstanding as of July 31, 2026, plus 14,221,486 shares attributable to the Convertible Preferred Stock.

Jane Street Group's Amended Schedule 13G Filing for Super Micro Computer

According to the filing, Jane Street Group, LLC, a Delaware-organized holding company, submitted Amendment No. 3 to its Schedule 13G disclosing a beneficial ownership position of 22,895,125 shares of Super Micro Computer, Inc. (NASDAQ:SMCI) common stock, $0.001 par value, as of the event date of September 30, 2026. The filing identifies Jane Street Capital, LLC, Jane Street Global Trading, LLC, and Jane Street Singapore Pte. Limited as subsidiaries of Jane Street Group, LLC.

The filing notes that the aggregate position includes 14,221,486 shares that can be acquired through Depositary Shares each representing a 1/20th interest in a share of 7.00% Series A Mandatory Convertible Preferred Stock held by Jane Street Global Trading, LLC. The percent-of-class figure of 3.4% for Jane Street Group, LLC uses a denominator of 671,186,870 shares, which the filing states is based on 656,965,384 shares outstanding as of July 31, 2026, as reported in the issuer's 10-K filed August 13, 2026, plus the 14,221,486 shares attributable to dilution from the Convertible Preferred Stock.

Jane Street Singapore Pte. Ltd, organized in Singapore, reported zero shares beneficially owned and 0.0% of the class. All reporting persons signed on November 6, 2026, with Jeremy Kahn serving as authorized signatory for each entity. The filing certifies, in accordance with Item 10, that the securities "were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer."

What Was Disclosed

Jane Street Group, LLC and three affiliates filed Amendment No. 3 to Schedule 13G reporting combined beneficial ownership of 22,895,125 shares of Super Micro Computer common stock, equal to 3.4% of the class, as of September 30, 2026, with no sole voting or dispositive power held by any reporting person.