Thiel sold over $1 billion worth of Palantir stock over the last few days of September and the first day of October, according to Securities and Exchange Commission ( SEC) filings. Those sales came after the company officially joined the S&P 500 on Sept. 23. Thiel also shed about $400 million worth of Palantir stock earlier this year.

Co-founder and Chairman Peter Thiel sold 12.4 million Palantir shares. His trading plan is now out of stock to sell.

As data mining firm Palantir’s shares continue to climb, Thiel is cashing out. He’s not the only Palantir insider doing so.

Peter Thiel sold almost $600 million of Palantir Technologies Inc. stock this week, bringing his total disposals this year to more than $1 billion. He sold more than 16 million shares over three days this week, according to a regulatory filing, adding to the 20 million shares he sold in March and May.

Peter Thiel, a co-founder and current chair of data analytics company Palantir (PLTR), has sold nearly $600 million of company stock. According to

Peter Thiel, the Chairman of Palantir Technologies (NYSE:PLTR), sold over $600M worth of the company's stock this week, bringing his total disposals this year to over $1B. In December last year, Palantir disclosed that entities owned by Thiel had adopted a type of trading plan which public-company executives commonly used to schedule sales.