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June 5, 2026

Amgen Inc. Framing the IRS Tax Dispute Ahead of the 2H+ Update

EquitiesHealth Care

This report outlines the status of Amgen's ongoing multi-year tax dispute with the IRS concerning transfer pricing between its U.S. and Puerto Rican operations. Analysts estimate a total potential liability of $20 billion including interest and penalties.

Key Takeaways

  • 1.Amgen is engaged in a multi-period IRS tax dispute concerning transfer pricing of profits between U.S. and Puerto Rican operations.
  • 2.The combined potential liabilities across tax years 2010-2022 are estimated at approximately $20 billion including tax, penalties, and interest.

Table of Contents

  • Summary of outstanding cases
  • Tax Years 2010–2015
  • Tax Years 2016–2022
  • Status of the disputes
  • Valuation and risks
  • Disclosure Appendix

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Authors

Salveen RichterMatt Dellatorre, Ph.D.Shrunatra MishraElizabeth Webster, Ph.D.Tommie ReerinkLydia ErdmanMark Aleynick

Securities

AMGN

Themes

Transfer Pricing DisputeCorporate Tax Liability

Regions

North AmericaUnited StatesPuerto Rico