X0206 3 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 Chief Executive Officer Common Stock 126860 I By: EdIP Revocable Trust Stock Option (Right to Buy) 5.48 2021-10-28 Common Stock 3649 D Stock Option (Right to Buy) 5.75 2024-10-01 Common Stock 5474 D Stock Option (Right to Buy) 5.07 2025-06-02 Common Stock 10948 D Stock Option (Right to Buy) 5.48 2026-04-11 Common Stock 14598 D Stock Option (Right to Buy) 5.21 2027-07-07 Common Stock 14598 D Stock Option (Right to Buy) 2.74 2028-02-21 Common Stock 364963 D Stock Option (Right to Buy) 3.15 2029-02-06 Common Stock 63548 D Stock Option (Right to Buy) 4.25 2030-03-16 Common Stock 194889 D Stock Option (Right to Buy) 5.48 2031-06-28 Common Stock 620437 D Series A-1 Preferred Stock Common Stock 3042 I By: EdIP Revocable Trust Series A-2 Preferred Stock Common Stock 1510 I By: EdIP Revocable Trust 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. This option is fully vested. The shares underlying this option vest in 48 monthly installments, equal to 2.0833% of the shares, over the 48 months following February 21, 2018. The shares underlying this option vest in 48 monthly installments, equal to 2.0833% of the shares, over the 48 months following February 6, 2019 The shares underlying this option vest in 48 monthly installments, equal to 2.0833% of the shares, over the 48 months following February 6, 2020. The shares underlying this option vest in 48 monthly installments, equal to 2.0833% of the shares, over the 48 months following June 28, 2021. Immediately prior to the completion of the Issuer's initial public offering, each share of Series A-1 Convertible Preferred Stock is convertible into shares of the Issuer's Common Stock, on a 13.7-for-one basis and has no expiration date. Upon the closing of the Issuer's initial public offering, all shares of Series A-1 Preferred Stock will convert into the number of shares of Common Stock of the Issuer shown in column 3. Immediately prior to the completion of the Issuer's initial public offering, each share of Series A-2 Convertible Preferred Stock is convertible into shares of the Issuer's Common Stock, on a 13.7-for-one basis and has no expiration date. Upon the closing of the Issuer's initial public offering, all shares of Series A-2 Preferred Stock will convert into the number of shares of Common Stock of the Issuer shown in column 3. /s/ Julie Feder 2021-10-28