JOINT FILING AGREEMENT

Exhibit A

JOINT FILING AGREEMENT

This will confirm the agreement by and among the undersigned that the Schedule 13D filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by the undersigned of the Common Stock of Transphorm, Inc., is being filed, and all amendments thereto will be filed, on behalf of each of the persons and entities named below that is named as a reporting person in such filing in accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Dated: March 13, 2020

	KKR PHORM INVESTORS L.P.
	By:	KKR Phorm Investors GP LLC, its general partner
	By:	/s/ Xxxxxxx X. Xxxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxxx
		Title: Vice President, Finance
	KKR PHORM INVESTORS GP LLC
	By:	/s/ Xxxxxxx X. Xxxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxxx
		Title: Vice President, Finance
	KKR GROUP PARTNERSHIP L.P.
	By:	KKR Group Holdings Corp., general partner
	By:	/s/ Xxxxxxx X. Xxxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxxx
		Title: Attorney-in-fact for
		Xxxxxx X. Xxxxx, Chief Financial Officer
	KKR GROUP HOLDINGS CORP.
	By:	/s/ Xxxxxxx X. Xxxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxxx
		Title: Attorney-in-fact for
		Xxxxxx X. Xxxxx, Chief Financial Officer
	KKR & CO. INC.
	By:	/s/ Xxxxxxx X. Xxxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxxx
		Title: Attorney-in-fact for
		Xxxxxx X. Xxxxx, Chief Financial Officer

	KKR MANAGEMENT LLP
	By:	/s/ Xxxxxxx X. Xxxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxxx
		Title: Attorney-in-fact for
		Xxxxxx X. Xxxxx, Chief Financial Officer
	XXXXX X. XXXXXX
	By:	/s/ Xxxxxxx X. Xxxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxxx
		Title: Attorney-in-fact
	XXXXXX X. XXXXXXX
	By:	/s/ Xxxxxxx X. Xxxxxxxxx
		Name: Xxxxxxx X. Xxxxxxxxx
		Title: Attorney-in-fact