TOMASELLO ROBIN 4
4 · SentinelOne, Inc. · Filed Mar 25, 2026
Research Summary
AI-generated summary of this filing
SentinelOne (S) CAO Robin Tomasello Receives Award, Sells 1,496 Shares
What Happened
Robin Tomasello, Chief Accounting Officer of SentinelOne (S), had the second tranche of a 2024 performance‑based restricted stock unit (PRSU) award certified on March 23, 2026, resulting in 4,148 PRSUs being earned and settled. On March 25, 2026 Tomasello reported an issuer‑mandated sell‑to‑cover of 1,496 shares at $13.37 each, yielding $20,002. The sale was executed solely to satisfy tax‑withholding obligations and was not a discretionary trade.
Key Details
- Transaction dates and amounts:
- 2026-03-23: Award/acquisition of 4,148 PRSUs (reported at $0 acquisition price) — second tranche of 2024 PRSU Award, earned at 90.2% of target.
- 2026-03-25: Sale of 1,496 shares at $13.37 for $20,002 (sell‑to‑cover for taxes).
- Shares remaining after the sell-to-cover: approximately 2,652 shares from this tranche (4,148 vested less 1,496 sold), assuming settlement; filing does not state total shares beneficially owned after the transactions.
- Footnotes of note:
- The award vesting was performance‑based and required continued service; the second tranche was certified by the compensation committee (F1, F2).
- Some shares remain subject to forfeiture if vesting conditions are later unmet (F3).
- The sale was an issuer‑mandated sell‑to‑cover for tax withholding under the equity plan, not a discretionary sale (F4).
- Filing timing: Form 4 was filed March 25, 2026 covering the March 23 certification and March 25 sale (filed within the usual Form 4 reporting window).
Context
A PRSU vesting plus a sell‑to‑cover is a routine insider event: the company certified performance results, shares vested, and the company’s plan required part of the vested shares to be sold to satisfy taxes. This transaction reflects compensation settlement mechanics rather than a voluntary market timing decision by the executive.
Insider Transaction Report
- Award
Class A Common Stock
[F1][F2][F3]2026-03-23+4,148→ 405,019 total - Sale
Class A Common Stock
[F4][F3]2026-03-25$13.37/sh−1,496$20,002→ 403,523 total
Footnotes (4)
- [F1]The reported transaction represents the certification of achievement of the second of four tranches of a performance-based restricted stock unit award granted to the reporting person by the Issuer's compensation committee on March 15, 2024 (the "2024 PRSU Award"). Vesting of each tranche of the 2024 PRSU Award is based on the achievement of pre-determined corporate performance milestones and is subject to the reporting person's continued service through the certification date of achievement of the relevant tranche.
- [F2]On March 23, 2026 (the "Certification Date"), the Issuer's compensation committee certified achievement of the second tranche of the 2024 PRSU Award, resulting in one-fourth of the 2024 PRSU Award becoming earned at 90.2% of the target amount granted. The performance restricted stock units comprising the second tranche of the 2024 PRSU Award so earned are fully vested and may be settled for shares of the Issuer's Class A common stock on the Certification Date.
- [F3]Certain of the shares are subject to forfeiture to the Issuer if underlying vesting conditions are not met.
- [F4]The sale reported on this Form 4 represents an Issuer mandated sale by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of performance-based Restricted Stock Units, and it does not represent a discretionary trade by the Reporting Person. Pursuant to the Issuer's equity incentive plan, an award recipient's tax withholding obligations must be funded by a "sell to cover" transaction.