X0508 4 2026-02-20 0 0001462056 Backblaze, Inc. BLZE 0001857850 Budman Gleb 2261 MARKET STREET STE 81006 SAN FRANCISCO CA 94114 1 1 0 0 CEO and Chairperson 0 Class A Common Stock 2026-02-20 4 F 0 21002 4.40 D 2075011 D The shares of Class A Common Stock were withheld by the Issuer to cover tax withholding obligations in connection with the vesting of restricted stock units (RSUs). No shares were sold by the Reporting Person to satisfy this tax liability. /s/ Evangeline Cheung, Attorney-in-Fact 2026-02-24