X0508 4 2023-11-20 0 0001715768 Transphorm, Inc. TGAN 0001711062 MCFARLAND KATHARINA G. C/O TRANSPHORM, INC. 75 CASTILIAN DRIVE GOLETA CA 93117 1 0 0 0 1 Common Stock 2023-11-20 4 S 0 3515 3.01 D 90203 D These sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 17, 2023. This sale price represents the weighted average sale price of the shares sold ranging from $3.00 to $3.025 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 2023-11-21