X0206 3 2021-10-28 0 0001501796 Aura Biosciences, Inc. AURA 0001808098 Johnson David Michael C/O AURA BIOSCIENCES, INC. 85 BOLTON STREET CAMBRIDGE MA 02140 1 0 0 0 Series E Convertible Preferred Stock Common Stock 139672 I By Velosity Capital Management LLC Stock Option (Right to Buy) 4.38 2030-12-14 Common Stock 116788 D Stock Option (Right to Buy) 5.48 2031-06-28 Common Stock 204379 D Immediately prior to the completion of the Issuer's initial public offering, each share of Series E 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 E Preferred Stock will convert into the number of shares of Common Stock of the Issuer shown in column 3. Velosity Capital Management LLC is an entity that the reporting person is the sole member of. The shares underlying this option vest in 48 monthly installments, equal to 2.0833% of the shares, over the 48 months following December 8, 2020. The shares underlying this option vest in 48 monthly installments, equal to 2.0833% of the shares, over the 48 months following March 18, 2021. /s/ Julie Feder 2021-10-28