Mark Epstein

Mark Lawrence Epstein (born July 14, 1954), nicknamed "Puggy", is an American property developer and real estate investor. The brother of convicted sex offender and financier Jeffrey Epstein, he has been active in real estate since the 1990s, founding and leading several companies, including Ossa Properties and Dara Partners. He also founded a silkscreen printing studio and a yacht charter service. Epstein is a 1976 graduate of Cooper Union's School of Art, and has been involved in philanthropy, serving on the boards of several nonprofits and as a chair of the Cooper Union board of trustees from 2009 to 2015.

Early life and education

Mark Epstein was born in 1954 to Pauline "Paula" (née Stolofsky) and Seymour George Epstein, a Jewish couple who married in 1952. He and his brother grew up in Sea Gate, a private gated community in Coney Island, Brooklyn. Epstein is a 1976 graduate of Cooper Union's School of Art and also studied at Stony Brook University.

Career A former artist, Epstein has been a real-estate investor since the 1990s. When he legally incorporated this business as a company in 1986, he named it IZMO Productions; and Herb Aach, and it also did silkscreen work creating advertisements such as theater and festival posters.

In 1994, he co-founded King Graphic Technologies,

Yacht charter and delivery service In 1986, Epstein started a charter/leasing company, Atelier Enterprises. was refitted and co-founded Ossa Properties, a company that manages real estate owned by himself and others.

By 1993, Ossa Properties had grown to own more than 500 apartments across four New York City co-ops. The Wall Street Journal called the source of Epstein's wealth difficult to assess because his assets are housed in partnerships. and became active in alumni affairs, eventually serving as secretary/treasurer and president of the Alumni Association. In 2002, he was named Cooper Union's Alumnus of the Year. By the end of that term, in 2009, he had donated between $500,000 and $999,000 to the school.

In 1993, at age 39, Epstein semi-retired to do more work with multiple nonprofits. He was a board member of the Exit Art cultural center, and in 2011 he loaned them $75,000. Epstein serves on the board of the Humpty Dumpty Institute (HDI), a nonprofit that fosters dialogue between members of the United Nations, the U.S. Congress, and other governments to address global problems. In 2014, he loaned HDI at least $100,000. for his $990,000 asking price, he donated it to Marine Science and Nautical Training Academy in Charleston. saying, "it looks more like a homicide". He said his brother had damaging information about powerful people that made him a target. Mark insisted that the circumstances of Jeffrey's death were inconsistent with suicide and rejected the Department of Justice's findings. He said Jeffrey told him he had "dirt on people" that "could put them in prison", recounting an incident from the 2016 U.S. presidential election when Jeffrey allegedly said that if he revealed what he knew about the candidates, the election would be canceled. Mark alleged a government coverup of Jeffrey's death and said that federal authorities released doctored or incomplete evidence, including edited video from the jail. He criticized high-ranking officials for their statements and actions related to the investigation and urged authorities to reopen it. He received no response.

In 2024, Mark said he did not know why Jeffrey's friendship with Donald Trump ended. He said that Jeffrey had said on tape that he "stopped hanging out with Donald Trump when he realized Trump was a crook." In July 2025, Mark made further statements, emphasizing their closeness, rebutting Trump's assertions that he "was not a fan" of Jeffrey and Steven Cheung's statement that "the president was never in Epstein's office" after one of Jeffrey's victims mentioned having had a "disturbing" encounter with Trump in Jeffrey's office in 1995.