Exhibit D

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 FS KKR Capital Corp. 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: September 13, 2022

	KKR FSK AGGREGATOR (UNLEV) L.P.
	By: KKR FSK Aggregator (Unlev) GP LLC, its general partner

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	KKR FSK II AGGREGATOR (UNLEV) L.P.
	By: KKR FSK Aggregator (Unlev) GP LLC, its general partner

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	KKR ALTERNATIVE ASSETS L.P.
	By: KKR Alternative Assets Limited, its general partner

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	KKR FSK AGGREGATOR (UNLEV) GP LLC

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	KKR FINANCIAL HOLDINGS LLC
	By: KKR Group Holdings Corp., its general partner

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Attorney-in-fact for Robert H. Lewin, Chief Executive Officer

	KKR CREDIT ADVISORS (US) LLC

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Attorney-in-Fact for Jeff Van Horn, Chief Financial Officer

	KOHLBERG KRAVIS ROBERTS & CO. L.P.
	By: KKR & Co. GP LLC, its general partner

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Attorney-in-fact for Robert H. Lewin, Chief Financial Officer

	KKR & CO. GP LLC

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Attorney-in-fact for Robert H. Lewin, Chief Financial Officer

	KKR HOLDCO LLC

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Attorney-in-fact for Robert H. Lewin, Chief Financial Officer and Treasurer

	KKR ALTERNATIVE ASSETS LIMITED

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	KKR GROUP ASSETS HOLDINGS II L.P.
	By: KKR Group Assets II GP LLC, its general partner

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Attorney-in-fact for Robert H. Lewin, Chief Financial Officer

	KKR GROUP ASSETS II GP LLC

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Attorney-in-fact for Robert H. Lewin, Chief Financial Officer

	KKR GROUP PARTNERSHIP L.P.
	By: KKR Group Holdings Corp., its general partner

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	KKR GROUP HOLDINGS CORP.

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	KKR GROUP CO. INC.

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	KKR & CO. INC.

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	KKR MANAGEMENT LLP

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Assistant Secretary

	HENRY R. KRAVIS

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Attorney-in-fact

	GEORGE R. ROBERTS

	By: /s/ Christopher Lee
	Name: Christopher Lee
	Title: Attorney-in-fact