Insider holders · CIK 0001653087
Alector, Inc. · ALEC
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| PVP VI (AIV) Feeder Corp. Holding Partnership, L.P.10% Owner | — | 12,858,194 | 12,858,194 | Feb 13, 2019 · 5:33 pm EST | Form 4 |
| Polaris Venture Partners VI (AIV), L.P.10% Owner | — | 12,858,194 | 12,858,194 | Feb 13, 2019 · 5:33 pm EST | Form 4 |
| Polaris Venture Management Co. VI, L.L.C.10% Owner | — | 12,858,194 | 12,858,194 | Feb 13, 2019 · 5:33 pm EST | Form 4 |
| Polaris Venture Partners Founders' Fund VI, L.P.10% Owner | — | 12,858,194 | 12,858,194 | Feb 13, 2019 · 5:33 pm EST | Form 4 |
| Polaris Venture Partners VI, L.P.10% Owner | — | 12,858,194 | 12,858,194 | Feb 13, 2019 · 5:33 pm EST | Form 4 |
| Terrance McGuireDirector | — | 12,858,194 | 12,858,194 | Feb 13, 2019 · 5:35 pm EST | Form 4 |
| Arnon RosenthalChief Executive Officer | 2,294,600 | 1,002,500 | 3,297,100 | Sep 4, 2026 · 5:45 pm EDT | Form 4 |
| Tillman U. GerngrossDirector | 2,608,610 | — | 2,608,610 | Feb 11, 2019 · 7:12 pm EST | Form 4 |
| Sabah OneyChief Business Officer | 593,918 | — | 593,918 | Feb 6, 2019 · 8:03 pm EST | Form 3 |
| Robert KingChief Development Officer | 537,317 | — | 537,317 | Feb 6, 2019 · 8:01 pm EST | Form 3 |
| Neil Lindsay BerkleyCFO & Chief Business Officer | 350,649 | — | 350,649 | Sep 4, 2026 · 5:45 pm EDT | Form 4 |
| Robert PaulChief Medical Officer | 333,719 | — | 333,719 | Feb 6, 2019 · 8:02 pm EST | Form 3 |
| OrbiMed Capital GP IV LLCDirector | — | 203,200 | 203,200 | Feb 11, 2019 · 7:11 pm EST | Form 4 |
| Carl L GordonDirector | — | 203,200 | 203,200 | Feb 11, 2019 · 7:06 pm EST | Form 4 |
| ORBIMED CAPITAL LLCDirector | — | 203,200 | 203,200 | Feb 11, 2019 · 7:11 pm EST | Form 4 |
| ORBIMED ADVISORS LLCDirector | — | 203,200 | 203,200 | Feb 11, 2019 · 7:11 pm EST | Form 4 |
| Calvin YuVice President, Finance | 175,294 | — | 175,294 | Feb 6, 2019 · 7:52 pm EST | Form 3 |
| Louis J Lavigne Jr.Director | 128,109 | 10,552 | 138,661 | Jun 17, 2026 · 4:05 pm EDT | Form 4 |
| Richard H SchellerDirector | 134,899 | — | 134,899 | Jun 17, 2026 · 4:05 pm EDT | Form 4 |
| Kristine YaffeDirector | 124,109 | — | 124,109 | Jun 17, 2026 · 4:05 pm EDT | Form 4 |
| Elizabeth A. GarofaloDirector | 118,650 | — | 118,650 | Jun 17, 2026 · 4:05 pm EDT | Form 4 |
| Grace Wong-SaradPrincipal Accounting Officer | 106,015 | — | 106,015 | Sep 4, 2026 · 5:45 pm EDT | Form 4 |
| Paula HammondDirector | 103,609 | — | 103,609 | Jun 17, 2026 · 4:05 pm EDT | Form 4 |
| Mark AltmeyerDirector | 98,650 | — | 98,650 | Jun 17, 2026 · 4:05 pm EDT | Form 4 |
| Errol B DesouzaDirector | 98,650 | — | 98,650 | Jun 17, 2026 · 4:05 pm EDT | Form 4 |
| David M. WehnerDirector | 24,621 | — | 24,621 | Feb 11, 2019 · 7:08 pm EST | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.