Jon S. Corzine has resigned from his posts at the embattled brokerage MF Global, the company announced on Friday.

Mr. Corzine, the firm’s chairman and chief executive, will not seek severance payments from MF Global, which filed for bankruptcy on Monday, according to the company’s statement. Under his employment contract, he was entitled to $12 million in payouts.

“I feel great sadness for what has transpired at MF Global and the impact it has had on the firm’s clients, employees and many others,” Mr. Corzine, 64, said in a statement. “I intend to continue to assist the company and its board in their efforts to respond to regulatory inquiries and issues related to the disposition of the firm’s assets.”

Mr. Corzine’s resignation marks the end of a troubled chapter in his career. The former head of Goldman Sachs, Mr. Corzine joined MF Global in March 2010 following a failed re-election bid for New Jersey governor.

Soon after joining the firm, he moved to transform the firm from a sleepy brokerage into full-service investment bank in the mold of his former employer, Goldman. He aggressively bought up European sovereign debt, wagering that the Continent would not let troubled countries default on their loans.

As the sovereign debt crisis dragged on this fall, regulators noticed the risky bets and pushed the firm to hold more capital against the investments. The move alarmed shareholders, clients and rating agencies, inciting a crisis of confidence. With the stock in freefall, the firm searched desperately for a suitor to buy at least a part of its business.

MF Global had a hand-shake deal late Sunday, but the overnight revelation of hundreds of millions of dollars of missing customer money scuttled any potential deal. Early Monday, the firm filed for bankruptcy.

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