BLK ▲ +0.1% - BlackRock, Inc. $BLK Blackrock to build customizable 401k funds for firms - WSJ BlackRock announced plans to build customizable 401(k) funds for companies, a move aimed at expanding its retirement services offerings to corporate clients. The modest 0.1% gain suggests the market viewed the initiative as a modest positive, though the news did not generate significant investor enthusiasm. 16-SEP-2026 06:02 AM ET