Amgen Inc. (NASDAQ: AMGN) Securities Fraud Class Action

Case Background:
This is a federal securities fraud class action lawsuit on behalf of those who purchased or otherwise acquired Amgen Inc. (“Amgen”) (NASDAQ: AMGN) common stock between July 29, 2020 and April 27, 2022, inclusive (the “Class Period”). 

Amgen is an independent biopharmaceutical company that develops, manufactures, and markets treatments for serious illnesses. 

The complaint alleges that, throughout the Class Period, Defendants made false and/or misleading statements and/or failed to disclose that: (1) the U.S. government claimed Amgen owed more than $3 billion in back taxes for tax years 2010, 2011, and 2012; (2) the U.S. government claimed Amgen owed more than $5 billion in back taxes for tax years 2013, 2014, and 2015; (3) the U.S. government would likely claim Amgen owed materially more to the U.S. government than investors had been led to believe for subsequent tax years for which Amgen had used the same profit allocation treatment between its U.S. and Puerto Rico operations; (4) Amgen had not taken sufficient accruals to account for its outstanding tax liabilities; (5) Amgen had failed to comply with ASC 450 and other rules and regulations regarding the preparation of its periodic SEC filings; (6) Amgen’s refusal to pay taxes claimed by the U.S. government exposed Amgen to a substantial risk of severe financial penalties imposed by the IRS; and (7) as a result of the foregoing, Defendants’ statements about the company’s business, operations, and prospects were materially false and/or misleading and/or lacked a reasonable basis at all relevant times.

Current Status of Case:
On December 9, 2025, the Lead Plaintiff served its Motion for Class Certification. This action is in the discovery phase and is ongoing. 

If you wish to discuss this action or have any questions, please contact Kessler Topaz Meltzer & Check, LLP: Jon Naji, Esq. (484) 270-1453; toll-free at (844) 887-9500; or via e-mail at info@ktmc.com. If you would like additional information about the suit, please click on the link "Submit Your Information" above and fill out the form as promptly as possible.

ABOUT KESSLER TOPAZ MELTZER & CHECK, LLP:
Kessler Topaz Meltzer & Check, LLP (KTMC) is a leading U.S. plaintiff-side law firm focused on securities-fraud class actions and global investor protection. The firm represents individual investors as well as institutions, such as major pension funds, asset managers, and international investors. KTMC has led some of the largest recoveries in securities litigation and has been recognized by peers and the legal media with numerous accolades, including The National Law Journal’s Plaintiff’s Hot List and Trailblazers in Plaintiffs' Law, BTI Consulting Group’s Honor Roll of Most Feared Law Firms, The Legal Intelligencer’s Class Action Firm of the Year, Lawdragon’s Leading Plaintiff Financial Lawyers, and Law360’s Titans of the Plaintiffs Bar. The firm operates globally with offices in Pennsylvania and California. KTMC has recovered over $25 billion for our clients and the classes they represent.