X0306 4 2022-08-12 0001180145 Cardiovascular Systems Inc CSII 0001712822 Sedo Sandra 1225 OLD HIGHWAY 8 NW ST. PAUL MN 55112 1 Chief Compliance Officer Common Stock 2022-08-12 4 F 0 1942 16.64 D 120431 D The reporting person has elected to satisfy her tax withholding obligation in connection with the vesting of prior restricted stock grants by directing the Company to withhold shares otherwise issuable upon vesting of the previously reported grants. /s/ Andrew Nick as Attorney-in-Fact for Sandra Sedo pursuant to Power of Attorney previously filed. 2022-08-16