Alector (ALEC) insider trading in the last 6 months

Form 4 filings, newest first

Quality Score today 0

3 insiders sold $524K. No buys.

SellArnon Rosenthal$193KChief Executive Officerat $2.66 on Sep 3, filed Sep 4

SellArnon RosenthalChief Executive Officer$193Kat $2.66 on Sep 3, filed Sep 4

SellNeil Lindsay Berkley$78KCFO & Chief Business Officerat $2.66 on Sep 3, filed Sep 4

SellNeil Lindsay BerkleyCFO & Chief Business Officer$78Kat $2.66 on Sep 3, filed Sep 4

SellGrace Wong-Sarad$14KPrincipal Accounting Officerat $2.67 on Sep 3, filed Sep 4

SellGrace Wong-SaradPrincipal Accounting Officer$14Kat $2.67 on Sep 3, filed Sep 4

From SEC Form 4s, the newest filed Sep 4, 2026 · Insiders have 2 business days to file a trade

6 more filings on ALEC in the last 6 months, for Pro members. See them free →

We do the work for you. Every stock is scored and ranked, every 15 seconds while the market is open. Here it's 15 minutes behind. Pro members see it live.

See all 9 tradesSee it live, free until Friday morning. No account. No card. Then keep going with a free account.

Pro members see every filing on ALEC with what each insider bought or sold and at what price, and can turn on an optional alert when an insider buys.

Who files at Alector

Insider trades by person

Tested. Our top-⁠scored stocks returned 2.2x the average stock over the next month. How we tested it

Questions about ALEC's insider trades

As of Nov 4, 2026: Alector (ALEC) has 9 insider filings on record in the last 6 months, the newest filed Sep 4, 2026. Its Quality Score is 0 (Below Average). Scores as of 11:39 PM ET, 15 minutes behind.

Are ALEC insiders buying or selling?

3 insiders sold $524K across 9 filings in the last 6 months. No open-⁠market buys on record. The newest filing: Arnon Rosenthal, Chief Executive Officer, sold $193K on Sep 3, 2026.

Who are ALEC's biggest insider sellers?

By the dollars of their sales in the last 6 months: Arnon Rosenthal (Chief Executive Officer), 2 sales; Neil Lindsay Berkley (CFO & Chief Business Officer), 2 sales; Grace Wong-⁠Sarad (Principal Accounting Officer), 5 sales.

When did an ALEC insider last buy?

No ALEC insider bought shares on the open market in the last 6 months, as filed on Form 4. The newest filing is a sale by Arnon Rosenthal on Sep 3, 2026.

Alector's page has its Quality Score, its chart, and its earnings. More in Healthcare and Biotech.