Key points
- Palantir CEO Alex Karp filed two SEC notices on August 20 to sell a combined $86.1 million in stock, 492,348 shares total.
- It's a Rule 144 notice of intent to sell, not a completed sale. His last confirmed Form 4 sale is from May 22.
- The filings landed the same week PLTR closed at $173.96, up 31% from a month earlier after its Q2 earnings beat.
Alex Karp filed two SEC notices on August 20, saying he wants to sell $86.1 million more of Palantir (PLTR) stock. Both landed the same day on our own insider-notices tracker. This normally fits his pattern: every one of Karp's 57 Form 4 filings since Palantir's 2020 IPO records a sale, an option exercise, or a stock conversion, never an open-market purchase. The timing is what stood out.
Palantir had just closed out its best month of the year. The stock finished that Thursday at $173.96, up 31% from the $132.66 it traded a month earlier, most of the move landing in one session after the company's August 3 earnings report. Karp filed his notice the same week the stock was pushing back toward the top of its 52-week range of $106.37 to $207.52.
What the two filings actually say
The document is a Form 144, a notice of proposed sale, and it works backward from how most insider selling gets reported. An officer or director has to file it before the shares change hands, giving the market advance notice instead of an after-the-fact receipt. We walked through the mechanics of the form on a similar filing from Kratos (KTOS)' CEO.
Karp's two notices cover 492,348 shares of Palantir's Class A stock between them. The larger one, 402,348 shares valued at $70.34 million, is drawn from restricted stock and skips any mention of a Rule 10b5-1 trading plan. The smaller one, 90,000 restricted stock units worth $15.77 million, cites a plan dated March 12, 2026. Both blocks came from the company that same day, so this is newly vested equity, sold the same day it was granted. Both list the same broker, Morgan Stanley Smith Barney, and the same approximate sale date: August 20.
Palantir's own filing lists Karp two ways: "Officer" and "Director." He's both, chief executive and a sitting board member, which is why the paperwork reads like a board-level disclosure even though most coverage only calls him the CEO.
A Form 144 is a plan, not a receipt. The last sale Palantir actually confirmed, in a Form 4, was filed May 22. Insiders get two business days after a trade to file that follow-up report. If the August 20 sale went off on schedule, the deadline for that confirming paperwork is Monday, August 24.
So far this looks routine. Karp has sold Palantir stock in almost every window the company has let him. He sold 38 million shares for $1.88 billion in 2024 alone. About $1.4 billion of that came from 25 million shares sold in the weeks around that year's presidential election, timing that had nothing to do with Palantir's business. Selling into a rally, the way he's doing now, is also the opposite of what an executive trying to get ahead of bad news usually does. We covered why the stock has room to keep running after Palantir's 93% revenue growth and raised guidance a few weeks ago.
That's an ordinary sale, the kind Palantir insiders make constantly. A CEO liquidating vested equity on a scheduled cadence is the routine case here. One of the two blocks even came with a trading plan on record since March, months before anyone knew August would be Palantir's best month of the year.
Sources
- SEC Form 144, Alexander Karp, filed August 20, 2026: 402,348 shares and 90,000 shares
- SEC EDGAR, Alexander Karp Form 4 filing history (CIK 0001823951)
- Live market data via Yahoo Finance, August 20-21, 2026
This is general market commentary, not investment advice.
