The US Securities and Exchange Commission has opened an investigation into Jon Isaac over allegations that he inflated earnings and sold shares while prices were being artificially boosted, according to multiple reports dated Aug. 19-23. Isaac has been described as either president of the $1.5 billion World Liberty Vehicle project or a key adviser to cryptocurrency platform Alt5 Sigma, which is partnering with the Trump family’s venture. Alt5 Sigma said in a statement that Isaac has never served as its president or adviser and that it has received no notice of an SEC probe. The New York-based firm, controlled by a father-and-son team whose other companies have previously drawn SEC scrutiny, is set to add Eric Trump to its board under a pending deal tied to the World Liberty initiative. The SEC has not filed formal charges, and details of the inquiry remain confidential. The investigation nonetheless heightens regulatory pressure on the broader World Liberty ecosystem as it prepares for a planned token launch on Sept. 1.