X0508 4/A 2023-05-22 2023-05-23 0001591956 Sphere 3D Corp. ANY 0001888940 Trompeter Patricia C/O SPHERE 3D CORP. 243 TRESSER BLVD., 17TH FLOOR STAMFORD CT 06901 1 1 0 0 CEO 0 Common Stock 2023-05-22 4 S 0 10000 0.3302 D 422467 D This transaction was inadvertently omitted from the Form 4 filed on 5/23/23 and represents the sale of shares by the reporting person to satisfy the issuer's tax withholding obligations in connection with the vesting of RSUs. The common shares and sale price reported in columns 4 and 5 do not reflect the issuer's 1 for 7 reverse stock split effective June 28, 2023. /s/ Denise Garrett For: Patricia Trompeter 2023-11-17