X0306 4 2021-12-02 0001389545 NovaBay Pharmaceuticals, Inc. NBY 0001738781 Kunin Audrey C/O NOVABAY PHARMACEUTICALS, INC. 2000 POWELL STREET, SUITE 1150 EMERYVILLE CA 94608 1 Chief Product Officer Common Stock 2021-12-02 2021-12-02 4 P 0 262369 0.476 A 398350 I See footnote This transaction was executed in multiple trades at prices ranging from $0.4650 to $0.4900. The price reported above reflected the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. By The Audrey G. Kunin Trust in which the reporting person serves as the trustee and has investment control. /s/ Audrey Kunin 2021-12-06