AMGEN INC

From time to time, we enter into business relationships, including joint ventures and collaborative arrangements, for the R&D, manufacture and/or commercialization of products and/or product candidates. In addition, we acquire product and R&D technology rights and establish R&D collaborations with third parties to enhance our strategic position within our industry by strengthening and diversifying our R&D capabilities, product pipeline and marketed-product base. These arrangements generally provide for nonrefundable upfront license fees, development and commercial-performance milestone payments, cost sharing, royalties and/or profit sharing. The activities under these collaboration agreements are performed with no guarantee of either technological or commercial success, and each is unique in nature.

Trade secret protection for our unpatented confidential and proprietary information is important to us. To protect our trade secrets, we generally require counterparties to execute confidentiality agreements upon commencement of a business relationship with us. However, others could either develop independently the same or similar information or unlawfully obtain access to our information.

AstraZeneca plc

We are in a collaboration with AstraZeneca for the development and commercialization of TEZSPIRE.1 Under our collaboration, both companies share global costs, profits and losses equally after payment by AstraZeneca of a mid-single-digit royalty to Amgen. AstraZeneca leads global development. In North America, Amgen, as the principal, recognizes product sales of TEZSPIRE in the United States, and AstraZeneca, as the principal, recognizes product sales of TEZSPIRE in Canada. AstraZeneca leads commercialization for TEZSPIRE outside North America. Amgen manufactures and supplies TEZSPIRE worldwide.

UCB

We are in a collaboration with UCB for the development and commercialization of EVENITY. Under our collaboration, UCB has rights to lead commercialization for EVENITY in most countries in Europe. Amgen, as the principal, leads commercialization for EVENITY and recognizes product sales in all other territories, including the United States. Global development costs and commercialization profits and losses related to the collaboration are shared equally. Amgen manufactures and supplies EVENITY worldwide.

In January 2020, we acquired an equity stake in BeOne for approximately $2.8 billion in cash as part of a collaboration agreement to expand our oncology presence in China. For additional information regarding our equity investment in BeOne, see Part IV—Note 10, Investments, to the Consolidated Financial Statements. Under the collaboration, BeOne began selling XGEVA in 2020, BLINCYTO in 2021 and KYPROLIS in 2022 in China, and Amgen shares profits and losses equally during the product-specific commercialization periods. Following entry into an amendment to this collaboration by Amgen and BeOne on November 11, 2025, BeOne will retain the right to commercialize XGEVA, BLINCYTO and KYPROLIS in China for so long as such products are sold in China. Amgen manufactures and supplies the collaboration products to BeOne.

In addition, we jointly develop a portion of our oncology portfolio with BeOne, which shares in global R&D costs by providing cash and development services of up to $1.25 billion. Upon regulatory approval, BeOne will assume commercialization rights in China for a specified period, and Amgen and BeOne will share profits and losses equally until certain of these product rights revert to Amgen. Upon return of the product rights, Amgen will pay royalties to BeOne on sales in China for a specified period. For product sales outside China, Amgen also pays royalties to BeOne.

For financial information about our significant collaborative arrangements, see Part IV—Note 9, Collaborations, to the Consolidated Financial Statements.

1 We are also in a collaboration with AstraZeneca for the development of AMG 104. See Research and Development and Selected Product Candidates section above.