X0306 4 2021-10-28 0 0001501796 Aura Biosciences, Inc. AURA 0001889633 de los Pinos Elisabet C/O AURA BIOSCIENCES, INC. 85 BOLTON STREET CAMBRIDGE MA 02140 1 1 0 0 See Remarks Common Stock 2021-10-28 4 A 0 74357 0.00 A 74357 D Common Stock 126860 I By EdIP Revocable Trust Stock Option (Right to Buy) 14.00 2021-10-28 4 A 0 318750 A 2031-10-27 Common stock 318750 318750 D These shares were acquired pursuant to a restricted stock unit award under the Company's 2021 Stock Option and Incentive Plan. Each restricted stock unit represents the right to receive one share of the Company's common stock. These restricted stock units vest in four substantially equal annual installments beginning on the one year anniversary of the date of grant. The shares are held by the Elisabet de los Pinos Revocable Trust U/D/T dated April 8, 2016, of which the Reporting Person is a trustee. The shares underlying this option vest as follows: 25% of the shares vest on the first anniversary of October 28, 2021 with the remainder vesting thereafter pro-rata in 36 monthly installments. President and Chief Executive Officer /s/ Julie Feder 2021-10-29