X0609 4 2026-09-11 0 0001533040 Phio Pharmaceuticals Corp. PHIO 0002073513 Carson Lisa Cabott false C/O PHIO PHARMACEUTICALS CORP 411 SWEDELAND RD., STE 23-1080 KING OF PRUSSIA PA 19406 0 1 0 0 Chief Financial Officer 0 Common Stock, $.0001 par value 2026-09-11 4 F 0 12888 1.03 D 81112 D The transaction represents the withholding of shares by the issuer to satisfy the reporting person's tax withholding obligations in connection with the vesting of restricted stock units. No shares were sold. Includes shares of common stock underlying unvested restricted stock units. /s/ Lisa C. Carson 2026-09-15