This article was reported and written in a collaboration with ProPublica, the nonprofit journalism organization.

A vice president of Memorial Sloan Kettering Cancer Center has to turn over to the hospital nearly $1.4 million of a windfall stake in a biotech company, in light of a series of for-profit deals and industry conflicts at the cancer center that has forced it to re-examine its corporate relationships.

The vice president, Dr. Gregory Raskin, oversees hospital ventures with for-profit companies. As compensation for representing the hospital on the biotech company’s board, Dr. Raskin received stock options whose value soared when the start-up went public a little over a week ago.

The move to hand over his stake is one of several steps now underway as the cancer center tries to contain a crisis that has already led to the resignation of its chief medical officer and a review of its conflict-of-interest policies. Several board members and some executives of the nonprofit institution have maintained close ties to the health and drug industries at a time when stunning cancer breakthroughs are generating excitement among investors and spawning a flurry of biotech start-ups.