May 30 (Reuters) - Billionaire hedge fund manager Bill Ackman is leaning toward supporting Donald Trump as the former U.S. president seeks to return to the White House, the Financial Times reported on Thursday, citing a person briefed on his thinking.

Ackman is likely to announce his support on X, the Elon Musk-controlled social media network, in which he has a minority stake, the report said.

The billionaire did not feel alternative candidates such as Robert F Kennedy Jr., whose long-shot presidential run he had also supported, were likely to win, the report said.

Ackman's hedge fund Pershing Square Capital Management did not immediately respond to a Reuters request for comment.

Last week Blackstone CEO Stephen Schwarzman had said he will support Trump in the U.S. election. His decision was motivated by worries about Democratic President Joe Biden's economic, immigration and foreign policies, as well as "the dramatic rise of antisemitism" in the country.

(Reporting by Pritam Biswas in Bengaluru; Editing by Arun Koyyur)