As filed with the Securities and Exchange Commission on May 31, 2023 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 NOVABAY PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 2834 (Primary Standard Industrial Classification Code Number) 2000 Powell Street, Suite 1150 Emeryville, CA 94608 (510) 899-880 ...

As filed with the Securities and Exchange Commission on May 31, 2023 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 NOVABAY PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 2834 (Primary Standard Industrial Classification Code Number) 2000 Powell Street, Suite 1150 Emeryville, CA 94608 (510) 899-880 ...

As filed with the Securities and Exchange Commission on May 17, 2023 Registration No. 333- 269083 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 AMENDMENT NO. 2 TO FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 NOVABAY PHARMACEUTICALS, INC. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 2834 (Primary Standard Industrial Classification Code Number) 68-0454536 (I.R.S. Employer Identificat ...