Rosenthal Arnon 4
4 · Alector, Inc. · Filed Mar 13, 2026
Research Summary
AI-generated summary of this filing
Alector (ALEC) CEO Arnon Rosenthal Receives RSU Award
What Happened
Arnon Rosenthal, CEO of Alector, was granted 116,246 restricted stock units (RSUs) on March 13, 2026. The filing reports an acquisition at $0.00 (a compensatory award), not an open-market purchase or sale.
Key Details
- Transaction date: 2026-03-13; transaction type: Award/Grant (code A).
- Shares granted: 116,246 RSUs; reported price: $0.00 (compensatory grant).
- Vesting: 1/2 of the RSUs vest on September 1, 2026; the remaining 1/2 vest on March 1, 2027 (footnote F1).
- Holdings/Trusts: filing notes certain reported securities are held in family trusts for which Rosenthal serves as trustee (footnotes F2–F5).
- Shares owned after the grant: not specified in the provided filing details.
- Filing timeliness: Reported on the same date as the transaction (filed 2026-03-13), indicating a timely Form 4.
Context
RSU grants are a form of executive compensation that vest over time and are not immediate cash buys or sells; they align executive pay with company stock performance but do not, by themselves, signal a market purchase. This was a routine award (compensation), not an exercise/sale or open-market trade.
Insider Transaction Report
Form 4
Alector, Inc.ALEC
Rosenthal Arnon
DirectorChief Executive Officer
Transactions
- Award
Common Stock
[F1]2026-03-13+116,246→ 2,454,422 total
Holdings
- 1,972,875(indirect: See footnote)
Common Stock
[F2] - 652,500(indirect: See footnote)
Common Stock
[F3] - 652,500(indirect: See footnote)
Common Stock
[F4] - 652,500(indirect: See footnote)
Common Stock
[F5]
Footnotes (5)
- [F1]The reported shares are represented by restricted stock units, or RSUs, one half (1/2) of the total shares shall vest on September 1, 2026 and one half (1/2th) of the total shares shall vest on March 1, 2027.
- [F2]The reported securities are held directly by The Rosenthal Family Revocable Trust Dated November 4, 1994, as restated on June 9, 1999, for which the Reporting Person serves as trustee.
- [F3]The reported securities are held directly by the Adi Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.
- [F4]The reported securities are held directly by the Noam Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.
- [F5]The reported securities are held directly by the Shani Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.
Signature
/s/ Grace Wong-Sarad, by power of attorney|2026-03-13