Thomas H. Lee, the pioneering financier known for his leveraged buyouts, has died at 78.

Lee, a billionaire from the United States, was found dead in his office in New York City. Sources report that the financier died of a self-inflicted gunshot wound.

Lee was well-known for his business acumen and was a leader in the leveraged buyout industry. He was the founder of Thomas H. Lee Partners, a private equity firm, and had a long career in finance.

Lee’s family released a statement saying, “Thomas was a beloved husband, father, and grandfather. He was a passionate philanthropist, a generous friend, and a respected leader in the business world. He will be deeply missed.”

The full details of Lee’s death have yet to be released, but many are mourning the loss of the influential financier.

Lee leaves behind a legacy of innovation and success in the world of finance. He will be remembered for his contributions to the business world and for his generosity.