#1 The Restricted Stock Units (RSUs) were granted pursuant to the Amgen Inc. 2009 Amended and Restated Equity Incentive Plan and vest in three annual installments of 33%, 33% and 34% on 5/7/2026, 5/7/2027 and 5/7/2028, respectively.

#2 These shares include the following Restricted Stock Units (RSUs) granted under the Company's equity plans: 1,291 RSUs which will vest on 4/30/2025; 2,263 RSUs which will vest in installments of 1,114 each on 5/2/2025, and one installment of 1,149 on 5/2/2026; 3,390 RSUs which will vest in installments of 1,118 on 5/2/2025, 1,119 on 5/2/2026 and 1,153 on 5/2/2027; and 2,863 RSUs which will vest in installments of 944 on 5/7/2026, 945 on 5/7/2027, and 974 on 5/7/2028. Vested RSUs will be paid in shares of the Company's common stock on a one-to-one basis.

#3 These shares include 403 Dividend Equivalents (DEs) granted pursuant to the Amgen Inc. Amended and Restated Equity Incentive Plan and subject to a qualifying dividend reinvestment plan. DEs are credited on the reporting person's unvested RSUs and are paid out in shares of the Company's common stock on a one-to-one basis according to the vesting schedule, along with a cash payment for any remaining fractional share amount.

#1 These shares include the following Restricted Stock Units (RSUs) granted under the Company's equity plans: 1,122 RSUs which will vest on 5/5/2024; 1,291 RSUs which will vest on 4/30/2025; 2,263 RSUs which will vest in installments of 1,114 each on 5/2/2025, and one installment of 1,149 on 5/2/2026; and 3,390 RSUs which will vest in installments of 1,118 on 5/2/2025, 1,119 on 5/2/2026 and 1,153 on 5/2/2027. Vested RSUs will be paid in shares of the Company's common stock on a one-to-one basis.

#2 These shares include 553 Dividend Equivalents (DEs) granted pursuant to the Amgen Inc. Amended and Restated Equity Incentive Plan and subject to a qualifying dividend reinvestment plan. DEs are credited on the reporting person's unvested RSUs and are paid out in shares of the Company's common stock on a one-to-one basis according to the vesting schedule, along with a cash payment for any remaining fractional share amount.

#1 These shares include the following Restricted Stock Units (RSUs) granted under the Company's equity plans: 1,291 RSUs which will vest on 4/30/2025; 2,263 RSUs which will vest in installments of 1,114 each on 5/2/2025, and one installment of 1,149 on 5/2/2026; and 3,390 RSUs which will vest in installments of 1,118 on 5/2/2025, 1,119 on 5/2/2026 and 1,153 on 5/2/2027. Vested RSUs will be paid in shares of the Company's common stock on a one-to-one basis.

#2 These shares include 403 Dividend Equivalents (DEs) granted pursuant to the Amgen Inc. Amended and Restated Equity Incentive Plan and subject to a qualifying dividend reinvestment plan. DEs are credited on the reporting person's unvested RSUs and are paid out in shares of the Company's common stock on a one-to-one basis according to the vesting schedule, along with a cash payment for any remaining fractional share amount.

#1 These shares include the following Restricted Stock Units (RSUs) granted under the Company's equity plans: 1,122 RSUs which will vest on 5/5/2024; 2,544 RSUs which will vest in installments of 1,253 on 4/30/2024 and 1,291 on 4/30/2025; 3,377 RSUs which will vest in two installments of 1,114 each on 5/2/2024 and 5/2/2025, and one installment of 1,149 on 5/2/2026; and 3,390 RSUs which will vest in installments of 1,118 on 5/2/2025, 1,119 on 5/2/2026 and 1,153 on 5/2/2027. Vested RSUs will be paid in shares of the Company's common stock on a one-to-one basis.

#2 These shares include 666 Dividend Equivalents (DEs) granted pursuant to the Amgen Inc. Amended and Restated Equity Incentive Plan and subject to a qualifying dividend reinvestment plan. DEs are credited on the reporting person's unvested RSUs and are paid out in shares of the Company's common stock on a one-to-one basis according to the vesting schedule, along with a cash payment for any remaining fractional share amount.