Securities and Exchange Commissioner Allison Herren Lee, a Democrat, said Tuesday that she plans to leave her post.
Lee said in a statement that she has notified President Joe Biden that she intends to step down from the commission once her successor has been confirmed. Her term expires in June.
Commissioners can stay on up to 18 months after their term expires.
Commissioner Elad Roisman, a Republican, left the agency at the end of January.
Roisman's departure left the agency with only one Republican commissioner, Hester Peirce.