Schwarzman's comments, first reported by Axios, came as Trump is locked in legal disputes in several battleground states seeking to overturn Democratic challenger Joe Biden's win in the Nov. 3 U.S. presidential election. Trump has also resisted preparations transfer the reins of government to a new administration ahead of Biden's inauguration on Jan. 20.
"I supported President Trump and the strong economic path he built. Like many in the business community, I am ready to help President-elect Biden and his team as they confront the significant challenges of rebuilding our post-COVID economy," Schwarzman said in a statement on Monday.
The Trump campaign did not immediately respond to a request for comment.
Schwarzman, who leads a private equity firm with $584 billion in assets under management, had defended Trump's right to challenge the election result during a conference call of U.S. business leaders on Nov. 6. Since then, Trump's campaign and his allies have yet to score a legal win that could reverse the outcome of the election, despite alleging extensive voter fraud and irregularities without hard evidence.
Schwarzman's comments add to a growing chorus of Trump supporters and lawmakers in the Republican Party calling on him to begin facilitating a transition of power. Top Republican lawmakers, however, have so far resisted recognizing Biden as the next president.
"I'm a fan of good process," Schwarzman said. "In my comments three days after the election, I was trying to be a voice of reason and express why it's in the national interest to have all Americans believe the election is being resolved correctly."
(Reporting by Chibuike Oguh in New York; Editing by Dan Grebler)
By Chibuike Oguh