Since marrying Chelsea Clinton five years ago, Marc Mezvinsky, a money manager, appears to have settled into his life as Bill and Hillary Clinton’s son-in-law. He has regularly appeared at charitable events, once introducing the former president at the Clinton Foundation’s celebrity poker tournament by dryly saying, “You may have heard of my father-in-law.” And at the recent N.B.A. All-Star Game, Mr. Mezvinsky took a seat next to Mr. Clinton and his partner in charitable endeavors, Dikembe Mutombo, the former basketball star.

Beyond the glamour, being part of the Clinton family has provided Mr. Mezvinsky with another perk: access to wealthy investors with ties to the Clintons.

When Mr. Mezvinsky and his partners began raising money in 2011 for a new hedge fund firm, Eaglevale Partners, a number of investors in the firm were longtime supporters of the Clintons, according to interviews and financial documents reviewed by The New York Times. Tens of millions of dollars raised by Eaglevale can be attributed to investors with some relationship or link to the Clintons.

The investors include hedge fund managers like Marc Lasry and James Leitner; an overseas money management firm connected to the Rothschild family; and people from Goldman Sachs, including the chief executive, Lloyd C. Blankfein. Some of the investors in Eaglevale have contributed campaign money to the former president and Mrs. Clinton, who is widely expected to run for president again in 2016. Some have also contributed to the family’s foundation.