Glancy Prongay & Murray LLP, a leading national shareholder rights law firm, announces that a securities fraud class action lawsuit has been filed on behalf of investors who purchased or otherwise acquired Lantheus Holdings, Inc. (“Lantheus” or the “Company”) (NASDAQ: LNTH) securities between February 26, 2025 and August 5, 2025, inclusive (the “Class Period”). Lantheus investors have until November 10, 2025 to file a lead plaintiff motion.

IF YOU SUFFERED A LOSS ON YOUR LANTHEUS HOLDINGS, INC. (LNTH) INVESTMENTS, CLICK HERE TO INQUIRE ABOUT POTENTIALLY PURSUING CLAIMS TO RECOVER YOUR LOSS UNDER THE FEDERAL SECURITIES LAWS

What Happened?

On May 7, 2025, Lantheus released its first quarter 2025 financial results, missing consensus estimates, specifically with the Company’s key Radiopharmaceutical Oncology product, Pylarify. The Company disclosed that Pylarify sales had decreased year-over-year due to an alleged “temporal competitive disruption.” Additionally, the Company reduced its full-year guidance.

On this news, Lantheus’s stock price fell $24.35, or 23.2%, to close at $80.49 per share on May 7, 2025, thereby injuring investors.

Then, on August 6, 2025, Lantheus released its second quarter 2025 financial results, once again missing estimates and significantly reduced growth expectations for Pylarify, due to ongoing completion impacting pricing dynamics. The Company further slashed its full-year guidance.

On this news, Lantheus’s stock price fell $20.76, or 28.6%, to close at $51.87 per share on August 6, 2025, thereby injuring investors further.

What Is The Lawsuit About?

The complaint filed in this class action alleges that throughout the Class Period, Defendants made materially false and/or misleading statements, as well as failed to disclose material adverse facts about the Company’s business, operations, and prospects. Specifically, Defendants failed to disclose to investors that: (1) Lantheus did not have an accurate understanding of the pricing and competitive dynamics of Pylarify’s market; and (2) as a result, Defendants’ positive statements about the Company’s business, operations, and prospects were materially misleading and/or lacked a reasonable basis at all relevant times.

If you purchased or otherwise acquired Lantheus securities during the Class Period, you may move the Court no later than November 10, 2025 to request appointment as lead plaintiff in this putative class action lawsuit.

Contact Us To Participate or Learn More:

If you wish to learn more about this action, or if you have any questions concerning this announcement or your rights or interests with respect to these matters, please contact us:

Charles Linehan, Esq.

Glancy Prongay & Murray LLP

1925 Century Park East, Suite 2100

Los Angeles California 90067

Email: shareholders@glancylaw.com

Telephone: 310-201-9150

Toll-Free: 888-773-9224

Visit our website at www.glancylaw.com.

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If you inquire by email, please include your mailing address, telephone number and number of shares purchased.

To be a member of the Class you need not take any action at this time; you may retain counsel of your choice or take no action and remain an absent member of the Class.

This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and ethical rules.

View source version on businesswire.com: https://www.businesswire.com/news/home/20250916791235/en/