Barclays PLC filed a Schedule 13G with the SEC on November 6, 2026, disclosing beneficial ownership of 2,209,657 shares of Quantum Corp common stock, representing 5.60% of the class, as of a triggering event dated September 30, 2026.

Key Highlights

  • Aggregate beneficial ownership: Barclays PLC reported beneficially owning 2,209,657 shares of Quantum Corp common stock.
  • Percent of class: The reported stake represents 5.60% of the outstanding class of common stock.
  • Sole voting and dispositive power: Barclays PLC reported sole power to vote and dispose of 2,139,866 shares.
  • Shared voting and dispositive power: Barclays PLC reported shared power to vote and dispose of 69,791 shares.
  • Relevant subsidiaries: The filing identifies Barclays Bank PLC, Barclays Capital Inc, and Barclays Capital Securities Ltd as the subsidiaries that acquired the securities.
  • Triggering event date: The date of the event requiring the filing was September 30, 2026.
  • Filer classification: Barclays PLC is identified as a parent holding company (type HC) organized in the United Kingdom.

Barclays PLC Reports Crossing 5% Threshold in Quantum Corp Common Stock

According to the Schedule 13G filing, Barclays PLC, a United Kingdom-based parent holding company with a principal office at 1 Churchill Place, London E14 5HP, reported beneficial ownership of 2,209,657 shares of Quantum Corp common stock as of September 30, 2026. The filing was signed by Ramya Rao, Director, and submitted on November 6, 2026. Quantum Corp's principal executive offices are listed in the filing as 10770 E. Briarwood Avenue, CO, 80112, and the CUSIP number for the securities is 747906600.

The filing discloses that of the 2,209,657 shares beneficially owned, 2,139,866 are held with sole voting power and sole dispositive power, while 69,791 shares are held with shared voting power and shared dispositive power. The filing attributes the acquisition of the reported securities to three subsidiaries: Barclays Bank PLC, Barclays Capital Inc, and Barclays Capital Securities Ltd.

Barclays PLC certified in the filing that, "to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities." Items 5, 8, and 9 of the Schedule 13G, covering ownership of 5% or less, group membership, and dissolution of group, are each marked "Not Applicable" in the filing.

What Was Disclosed

Barclays PLC disclosed a 5.60% beneficial ownership position in Quantum Corp common stock via a Schedule 13G filed November 6, 2026, covering a September 30, 2026 triggering event, with the stake held across three named subsidiaries in the ordinary course of business.