Romney in Stem Cell Biz, Despite Political Opposition

On a conference call with reporters Monday, Brad Malt, of the law firm Ropes & Gray, said he has tried to adjust the investments so they are consistent with Romney's positions as a candidate. For example, he sold investments in two European companies doing business with Iran.

"The trustee clearly stated that he has -- to best of his ability -- executed transactions in a manner consistent with the public statements and policy positions of the governor and will continue to do so where applicable," Madden told ABC News in a written statement.

According to The Washington Post, another Republican presidential contender, Kansas Sen. Sam Brownback, who strongly opposes stem cell research, owns a mutual fund that invests in Novo Nordisk.