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Amgen settles shareholder lawsuit claiming it hid $10.7 billion tax bill

By Thomson Reuters Jul 21, 2026 | 10:16 AM

By Jonathan Stempel

NEW YORK, July 21 (Reuters) – Amgen reached a $74 million settlement of a lawsuit accusing the biotechnology company of waiting too ​long to disclose that it might owe ‌the Internal Revenue Service $10.7 billion for underreporting six years of taxes.

A preliminary settlement of the proposed class action was filed late Monday in Manhattan federal court and requires ‌a ​judge’s approval.

Amgen denied wrongdoing, and ⁠on Tuesday said it ⁠still believed the claims lacked merit.

The IRS accused Amgen of underpaying taxes between 2010 and 2015, mainly for improperly shifting profits to a Puerto ​Rico unit that made many of its drugs. Puerto Rico is considered a foreign country for ⁠corporate tax purposes, despite being ⁠a U.S. territory.

The IRS sought $8.7 billion ​in back taxes plus interest, as well as $2 billion ​of penalties, stemming from Amgen’s so-called transfer pricing ‌practices.

Amgen has said that a decision from the U.S. Tax Court could come this year.

Shareholders led by the Asbestos Workers Philadelphia Pension Fund said ⁠Amgen’s share price fell 6.5% on August 4, 2021, and 4.3% on April 28, 2022, because the Thousand Oaks, ⁠California-based company ‌waited until then to disclose its ⁠tax risks.

The settlement covers Amgen shareholders ​between July ‌29, 2020, and April 27, 2022.

A ​federal judge ⁠rejected Amgen’s bid to dismiss the case in September 2024.

Amgen’s top-selling products include the osteoporosis treatment Prolia and the drug Repatha for cardiovascular events and hyperlipidemia.

(Reporting by Jonathan Stempel in New York; Editing by ​Mark Porter)