Palantir's chief technology officer cashed out $5.4 million in stock this week, timing that looks either lucky or well-planned given how far the shares have run. Shyam Sankar sold 35,000 Class A shares on August 6, 2026 at a weighted average price between $153.40 and $157.44, for total proceeds of roughly $5.4 million, according to a Form 4 disclosed on August 10. The sale followed the conversion of an equal number of Class B shares and was executed under a Rule 10b5-1 trading plan Sankar set up back in March, which pre-schedules trades to avoid insider-timing questions.
The trade trimmed Sankar's stake by about 5.16%, leaving him with 642,786 shares. He's a familiar name on Palantir's insider-sale list alongside CEO Alex Karp and chairman Peter Thiel, both of whom have also sold stock steadily as the company's valuation has climbed.
A Stock That Hasn't Stopped Climbing
Sankar's sale looks almost conservative next to where the stock has gone since. Palantir shares traded around $123 at the end of July, jumped to the $153-$157 range where Sankar sold, and closed at $174.94 on August 11 — before slipping 1.72% to $171.93 in Wednesday premarket trading. The stock is up just 4.22% for 2026 overall, meaning the summer surge alone represents a roughly 42% gain in under two weeks, the kind of move that tends to pull insider selling along with it regardless of any individual executive's outlook. The Form 4 filing itself shows the sale was pre-scheduled rather than opportunistic, which is typical of how Palantir executives have structured their disposals.
Burry's Bet Says the Rally Is the Problem
Not every market participant is celebrating the run. Michael Burry, the investor who famously shorted the 2008 housing market, has built a short position against Palantir worth close to $1 billion in notional terms through long-dated put options, and has publicly reiterated the trade as recently as June, calling the stock a “sand castle” trading at roughly 16 times what he considers its intrinsic value. Burry's position had reportedly gained around 35% in value since he entered it in the third quarter of 2025, even as the underlying stock kept rising — a sign of how aggressively he's sized the bet with options rather than a straight short sale.
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Burry's thesis is part of a broader argument that AI infrastructure spending has outrun the revenue to justify it, a concern that has started showing up beyond individual stock picks — GSR has argued that crypto's next bull run may actually need AI capital expenditure to cool off before capital rotates back into risk assets more broadly. Whether Palantir's rally is a preview of an AI bubble unwinding or simply a company executing well, insider trades this size are usually a scheduled formality rather than a signal — which hasn't stopped either bulls or Burry from reading meaning into it.
