Palantir Technologies insider Stephen Cohen sold nearly 320,000 Class A shares worth about $43.5 million on May 20 to satisfy tax withholding obligations tied to vested stock awards.

Cohen, Palantir's president and secretary, sold nearly 320,000 Class A shares on May 20 at weighted average prices ranging from about $133 to nearly $137 per share through automatic transactions tied to restricted stock unit vesting.

The sales were carried out to satisfy tax withholding obligations linked to restricted stock unit vesting, a common tax-planning mechanism. Additional stock sales by CEO Alex Karp and CTO Shyam Sankar were also reported in recent filings.

Palantir's shares have climbed sharply over the past 12 months, with market participants monitoring insider transactions for signals on executive sentiment, though such sales may also reflect tax planning or prearranged trading programs.