Filed under Rule 497(e)
Registration No. 033-52742

SunAmerica Series Trust

SA AB Growth Portfolio

(the “Portfolio”)

Supplement dated August 4, 2026

to the Portfolio’s Statement of Additional Information (“SAI”)

dated May 1, 2026, as supplemented and amended to date

Effective immediately, in the table under the section entitled “Portfolio Managers – Other Accounts,” the information pertaining to AllianceBernstein is deleted in its entirety and replaced with the following:

 

Adviser/ Subadviser		Portfolio Managers		Other Accounts (As of January 31, 2026)
				Registered Investment Companies				Pooled Investment Vehicles				Other Accounts
				No. of Accounts		Assets (in millions)		No. of Accounts		Total Assets (in millions)		No. of Accounts		Total Assets (in millions)
Alliance- Bernstein		Fogarty, John H., CFA		8		$31,203		26		$60,755		3,262		$15,915
		Lisser, Joshua		34		$44,507		10		$1,972		70		$36,073
		MacGregor, James		10		$3,387		47		$2,038		52		$6,224
		Sklar, Ben		34		$44,507		10		$1,972		63		$34,005
		Thapar, Vinay, CFA		8		$31,203		26		$60,755		3,262		$15,915
		Singhvi, Shri, CFA		6		$2,988		5		$587		21,486		$19,514
		Turenchalk, Erik		8		$3,366		42		$1,392		52		$6,224

Capitalized terms used but not defined herein shall have the meanings assigned to them by the SAI.

PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE.

SASTSAI-SUP6 (7/26)