SEC Form 4 · accession 0001193125-26-383857
Alector, Inc. · ALEC
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Arnon Rosenthal
Officer — Chief Executive Officer · Director
Period of report
Sep 3, 2026
Accepted (ET)
Sep 4, 2026 · 5:45 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001653087
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF2 | Sep 3, 2026 | S | 72,606 | $2.6647 | D | 2,294,600 | D | |
| Common StockF3 | holding | — | — | — | 922,875 | I | See footnote | |
| Common StockF4 | holding | — | — | — | 1,002,500 | I | See footnote | |
| Common StockF5 | holding | — | — | — | 1,002,500 | I | See footnote | |
| Common StockF6 | holding | — | — | — | 1,002,500 | I | See footnote |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.
- F2The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.49 to $2.75. Full information regarding the number of shares sold at each separate price can be furnished to the SEC staff, the issuer, or any security holder of the issuer upon request.
- F3The 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.
- F4The reported securities are held directly by the Adi Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.
- F5The reported securities are held directly by the Noam Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.
- F6The reported securities are held directly by the Shani Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.