Goldman Sachs chief executive David Solomon has tightened his grip on the Wall Street firm, potentially upending the closely watched race to succeed him.

After a bruising stretch in which he had been under pressure over the firm’s ill-fated consumer expansion and questions swirled about his ability to hang on to the top job, Solomon in recent months has made it clear to top executives he plans to remain for a while. He has also been getting more involved in the day-to-day running of the firm, people familiar with the matter said.