New York | The paper fortune that former US president Donald Trump amassed by taking a nascent media start-up public is shrivelling, and a race to the exits that begins as soon as this Thursday (Friday AEST) could shrink it even more.

Trump Media & Technology Group, which owns the X-lookalike social media platform Truth Social, has shed nearly $US6 billion ($9 billion) in value over the past four months. Meanwhile, its largest shareholders have been unable to sell because of a lock-up agreement from when the firm went public through a special-purpose acquisition company merger in March.

Bloomberg