Contingencies and commitments	6 Months Ended
Contingencies and commitments	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Contingencies and commitments	Contingencies and commitments Contingencies In the ordinary course of business, we are involved in various legal proceedings, government investigations and other matters that are complex in nature and have outcomes that are difficult to predict. See our Annual Report on Form 10-K for the year ended December 31, 2023, Part I, Item 1A. Risk Factors—Our business may be affected by litigation and government investigations. We describe our legal proceedings and other matters that are significant or that we believe could become significant in this footnote; in Note 20, Contingencies and commitments, to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2023; and in Note 13, Contingencies and commitments, to the condensed consolidated financial statements in our Quarterly Report on Form 10-Q for the period ended March 31, 2024. We record accruals for loss contingencies to the extent that we conclude it is probable that a liability has been incurred and the amount of the related loss can be reasonably estimated. We evaluate, on a quarterly basis, developments in legal proceedings and other matters that could cause an increase or decrease in the amount of the liability that has been accrued previously. Our legal proceedings involve various aspects of our business and a variety of claims, some of which present novel factual allegations and/or unique legal theories. In each of the matters described in this filing; in Note 20, Contingencies and commitments, to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2023; and in Note 13, Contingencies and commitments, to the condensed consolidated financial statements in our Quarterly Report on Form 10-Q for the period ended March 31, 2024, in which we could incur a liability, our opponents seek an award of a not-yet-quantified amount of damages or an amount that is not material. In addition, a number of the matters pending against us are at very early stages of the legal process, which in complex proceedings of the sort we face often extend for several years. As a result, none of the matters described in this filing; in Note 20, Contingencies and commitments, to the consolidated financial statements in our Annual Report on Form 10-K for the year ended December 31, 2023; and in Note 13, Contingencies and commitments, to the condensed consolidated financial statements in our Quarterly Report on Form 10-Q for the period ended March 31, 2024, in which we could incur a liability, have progressed sufficiently through discovery and/or the development of important factual information and legal issues to enable us to estimate a range of possible loss, if any, or such amounts are not material. While it is not possible to accurately predict or determine the eventual outcomes of these matters, an adverse determination in one or more of these matters currently pending could have a material adverse effect on our consolidated results of operations, financial position or cash flows. Certain recent developments concerning our legal proceedings and other matters are discussed below. Repatha Patent Litigation Patent Disputes in the International Region Germany On May 13, 2024, the Regional Court of Dusseldorf stayed the hearing on Sanofi Biotechnology SAS’ infringement action pending the outcome of Amgen’s Nullity Action against the European Patent No. 2,756,004 before the German Federal Patent Court. Unified Patent Court of the European Union On July 16, 2024, the Central Division of the Unified Patent Court in Munich (UPC) rendered its decision on Sanofi-Aventis Deutschland GmbH’s action seeking revocation of Amgen’s European Patent 3,666,797 (the EP’797 Patent). In its decision, the Court concluded that the patent claims are invalid and revoked the patent. Subsequently, on July 29, 2024, the Local Division of the UPC stayed Amgen’s action against Sanofi-Aventis Deutschland GmbH, et al. alleging that the importation, marketing, sale and use of PRALUENT® infringes the EP’797 Patent. Prolia/XGEVA Biologics Price Competition and Innovation Act (BPCIA) Litigation Amgen Inc. et al. v. Celltrion Inc., et al. On May 28, 2024, Amgen Inc. and Amgen Manufacturing Limited LLC filed a lawsuit in the U.S. District Court for the District of New Jersey (New Jersey District Court) against Celltrion Inc. and Celltrion USA, Inc. (collectively, Celltrion) based on the submission to the FDA of a Biologics License Application (BLA) seeking approval to market and sell a biosimilar version of Amgen’s Prolia and XGEVA products. The complaint asserts infringement of the following 29 patents: U.S. Patent Nos. 7,364,736; 7,427,659; 7,928,205; 8,053,236; 8,460,896; 8,680,248; 9,012,178; 9,228,168; 9,320,816; 9,328,134; 9,359,435; 10,106,829; 10,167,492; 10,227,627; 10,513,723; 10,583,397; 10,822,630; 10,894,972; 11,077,404; 11,098,079; 11,130,980; 11,254,963; 11,299,760; 11,319,568; 11,434,514; 11,459,595; 11,486,883; 11,946,085; and 11,952,605 (collectively, the Asserted Patents). Amgen seeks a judgment from the New Jersey District Court that Celltrion has infringed or will infringe one or more claims of each of the Asserted Patents and based on that judgment, a permanent injunction prohibiting the commercial manufacture, use, offer to sell, or sale within the United States or importation into the United States of Celltrion’s proposed denosumab biosimilar before expiration of each of the Asserted Patents found infringed. Amgen also seeks monetary remedies for any past acts of infringement. ABP 938 (aflibercept) Patent Litigation On June 7, 2024, Regeneron Pharmaceuticals, Inc. (Regeneron) filed a motion for a preliminary injunction to prohibit Amgen from engaging in the manufacture, use, offer for sell or sale within the United States, or importation into the United States, of ABP 938 until resolution of this lawsuit or the entry of a permanent injunction, whichever comes first. Regeneron’s motion focuses on U.S. Patent No. 11,084,865, a formulation patent. On July 3, 2024, Amgen filed its opposition to Regeneron’s motion. On July 24, 2024, Regeneron filed its reply brief. Oral argument on Regeneron’s motion has been scheduled by the U.S. District Court for the Northern District of West Virginia for August 13, 2024. Antitrust Class Action Sensipar Antitrust Class Actions On May 14, 2024, the putative class of direct purchasers of Sensipar (Sensipar Plaintiffs) appealed the claims that were dismissed with prejudice by the U.S. District Court for the District of Delaware. The U.S. Court of Appeals for the Third Circuit has set a schedule for the Sensipar Plaintiffs to file their opening brief by September 9, 2024. Amgen has until October 9, 2024 to file its response and the Sensipar Plaintiffs must file their reply by November 7, 2024. Regeneron Pharmaceuticals, Inc. Antitrust Action On May 22, 2024, Amgen filed a motion for summary judgment. U.S. Tax Litigation and Related Matters Amgen Inc. & Subsidiaries v. Commissioner of Internal Revenue See Note 4, Income taxes, for discussion of the IRS tax dispute and the Company’s petitions in the U.S. Tax Court. Securities Class Action Litigation On July 18, 2024, the U.S. District Court for the Southern District of New York held a hearing on Amgen’s motion to dismiss. ChemoCentryx, Inc. Securities Matters On May 24, 2024, the United States Court of Appeals for the Ninth Circuit denied ChemoCentryx’s petition to appeal the class certification order. Trial is scheduled to begin on September 22, 2025. While the U.S. District Court for the Northern District of California (Northern District Court of California) has not yet set a deadline by which members of the class must opt out, on May 2, 2024, RA Capital Healthcare Fund, LP filed two similar securities cases, in the California Superior Court in Ventura County and in the Northern District Court of California, against ChemoCentryx and its former Chief Executive Officer, Dr. Thomas Schall. On July 2, 2024, the state court stayed the case pending an order on summary judgment in the federal class action.