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Quantum Corporation Securities Class Action Lawsuit: Important November 3, 2025 Lead Plaintiff Deadline

Strategic Insights

— 2 min read

The Rosen Law Firm, a global investor rights law firm, reminds purchasers of securities of Quantum Corporation (NASDAQ: QMCO) between November 15, 2024, and August 18, 2025, of the important November 3, 2025, lead plaintiff deadline in the securities class action first filed by the Firm. The lawsuit alleges that Quantum Corporation made false and/or misleading statements and/or failed to disclose that it improperly recognized revenue during the fiscal year ended March 31, 2025. As a result, investors suffered damages when the true details entered the market.

Key Takeaways:

  • The lawsuit alleges that Quantum Corporation made false and/or misleading statements and/or failed to disclose improper revenue recognition during the fiscal year ended March 31, 2025.
  • The alleged misconduct occurred between November 15, 2024, and August 18, 2025, and the lead plaintiff deadline is November 3, 2025.
  • The Rosen Law Firm has a track record of success in leadership roles in securities class actions, including the largest ever settlement against a Chinese company at the time and being ranked No. 1 by ISS Securities Class Action Services for number of securities class action settlements in 2017.
  • The firm has recovered hundreds of millions of dollars for investors, including over $438 million in 2019 alone.
  • Laurence Rosen, the founding partner, was named by law360 as a Titan of Plaintiffs' Bar in 2020.
  • Many of the firm's attorneys have been recognized by Lawdragon and Super Lawyers.
  • Quantum Corporation securities class action lawsuit has already been filed, and investors who purchased securities during the Class Period may be entitled to compensation without payment of any out-of-pocket fees or costs.
  • To join the lawsuit, visit or call Phillip Kim, Esq. toll-free at 866-767-3653 or email case@rosenlegal.com for information.

Statistics:

  • November 15, 2024, to August 18, 2025: the period during which Quantum Corporation allegedly made false and/or misleading statements and/or failed to disclose improper revenue recognition.
  • November 3, 2025: the lead plaintiff deadline in the securities class action lawsuit.
  • $438 million: the amount recovered by Rosen Law Firm for investors in 2019 alone.
  • 2013-present: the years during which Rosen Law Firm has been ranked in the top 4 for securities class action settlements.
  • $100s of millions: the amount recovered by Rosen Law Firm for investors.

Sources:

  • The Rosen Law Firm, P.A. (275 Madison Avenue, 40th Floor, New York, NY 10016)
  • Rosen Law Firm's website (www.rosenlegal.com)
  • Law360 (for the recognition of Laurence Rosen as a Titan of Plaintiffs' Bar)
  • ISS Securities Class Action Services (for the ranking of Rosen Law Firm as No. 1 for number of securities class action settlements in 2017)
  • Lawdragon and Super Lawyers (for recognition of Rosen Law Firm's attorneys)

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