SentinelOne (NYSE: S) CEO sells 527,368 shares in planned trade

Posted by Trevor Kearing on Oct 6th, 2026

What happened

SentinelOne, Inc. (NYSE: S) said President, CEO and director Tomer Weingarten sold 527,368 Class A shares on 2026-10-05.

The filing says the shares sold at $25.26 each, for about $13.32 million. It also says Weingarten held 1,717,510 shares after the sale.

The form says the trades were made under a Rule 10b5-1 plan adopted on July 2, 2026. It was filed on 2026-10-06.

The same filing shows a 500,000-share conversion of Class B common stock into Class A common stock on 2026-10-05. It lists 2,244,878 shares before the sale.

It also lists 423,629 Class A shares held by an irrevocable trust. The filing further shows a fully vested employee stock option for 500,000 Class B shares, exercisable through 03/23/2031.

Key numbers

Metric	Latest	Source
Shares sold	527,368 shares	SEC Form 4
Sale price	$25.26 per share	SEC Form 4
Sale value	about $13.32 million	SEC Form 4
Shares held after sale	1,717,510 shares	SEC Form 4
Pre-sale holding	2,244,878 shares	SEC Form 4
Class B shares converted	500,000 shares	SEC Form 4

Why it matters

The sale was about 23.5% of the 2,244,878 shares Weingarten held before the trade. That makes it a large transaction, even if the filing says it was prearranged.

The filing gives investors a clean read on insider ownership after a large planned sale. It is mixed for OptimistFi's case because it does not change the operating thesis, but it does reduce the CEO's direct stake.

The sale does not change SentinelOne's operating goals. It does leave Weingarten with 1,717,510 direct shares, which gives investors a new ownership benchmark.

The filing also shows a 500,000-share conversion of Class B common stock into Class A common stock on the same date. The conversion came before the sale in the record.

The main caveat is the Rule 10b5-1 plan. The trade may have been set up before this filing and may not signal a fresh view on the business.

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What's next

The next dated item in the form is the 03/23/2031 expiration of the fully vested employee stock option. The option was already fully vested on April 24, 2026, according to the filing.

Until then, the filing gives a reference point for Weingarten's direct ownership, not a new operating update. A later change in those holdings would be the clearest way this insider record could strengthen or weaken the read.