Bragar Eagel & Squire, P.C. Litigation Partner Brandon Walker Encourages Investors Who Suffered Losses In Regeneron (REGN) To Contact Him Directly To Discuss Their Options
If you are a long-term stockholder in Regeneron common stock between August 1, 2025, and May 15, 2026 and would like to discuss your legal rights, contact Bragar Eagel & Squire partners Brandon Walker or Melissa Fortunato by email at investigations@bespc.com or by telephone at (212) 355-4648.
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NEW YORK, July 17, 2026 (GLOBE NEWSWIRE) --
What’s Happening:
- Bragar Eagel & Squire, P.C., a nationally recognized shareholder rights law firm, is investigating potential claims against Regeneron Therapeutics, Inc. (NASDAQ:REGN) on behalf of long-term stockholders following a class action complaint that was filed against Regeneron on July 16, 2026 with a Class Period from August 1, 2025, and May 15, 2026. Our investigation concerns whether the board of directors of Regeneron have breached their fiduciary duties to the company.
Details:
- The complaint alleges that the Company and its executives violated federal securities laws by making false and/or misleading statements and/or failing to disclose the true state of Regeneron's Phase III Fianlimab-Libtayo Study; notably, that its preliminary statistical assumptions were fundamentally flawed, that the active treatment arm was failing to achieve meaningful clinical differentiation over standard therapies, and that the trial would ultimately fail to reach statistical significance on its primary endpoint even without overperformance of the control arm.
- Plaintiff alleges that April 29, 2026, during Regeneron's first quarter earnings call, defendants disclosed the Phase III Fianlimab-Libtayo Study had been altered, expanding the number of patients in the study eligible for "analysis of progression-free survival." On this news, the price of Regeneron's common stock declined from a closing market price of $731.77 per share on April 28, 2026, to $686.36 per share on April 29, 2026, a decline of about 6.2% in the span of just a single day. Then, after-market on May 15, 2026, Regeneron announced that the "Phase 3 Trial of Fianlimab . . . did not reach statistical significance for the primary endpoint of improvement in progression-free survival (PFS)." On this news, the price of Regeneron's common stock declined from $698.25 per share on May 15, 2026, to $629.68 per share on May 18, 2026, a decline of about 9.8% in the span of one day.
Next Steps:
- If you are a long-term stockholder of Regeneron, have information, would like to learn more about these claims, or have any questions concerning this announcement or your rights or interests with respect to these matters, please contact Brandon Walker or Melissa Fortunato by email at investigations@bespc.com, by telephone at (212) 355-4648, or by filling out this contact form. There is no cost or obligation to you.
About Bragar Eagel & Squire, P.C.:
Bragar Eagel & Squire, P.C. is a nationally recognized law firm with offices in New York, South Carolina, and California. The firm represents individual and institutional investors in securities, derivative, and commercial litigation as well as individuals in consumer protection and data privacy litigation. The firm has a nationwide practice and routinely handles cases in both federal and state courts. For more information about the firm, please visit www.bespc.com. Attorney advertising. Prior results do not guarantee similar outcomes.
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Contact Information:
Bragar Eagel & Squire, P.C.
Brandon Walker, Esq.
Melissa Fortunato, Esq.
(212) 355-4648
investigations@bespc.com
www.bespc.com
