X0306 4 2022-11-17 0 0001715768 Transphorm, Inc. TGAN 0001382883 RIVAS MARIO C/O TRANSPHORM, INC. 75 CASTILIAN DRIVE GOLETA CA 93117 1 1 0 0 Chief Executive Officer Common Stock 2022-11-17 4 S 0 3571 5.674 D 118202 D The reported shares were sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units. This sale price represents the weighted average sale price of the shares sold ranging from $5.45 to $5.98 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. /s/ Cameron McAulay, Attorney-in-Fact 2022-11-21