As of the latest Form 4 filed Jul 9, 2026.
What Alector Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 25 most recent filings for ALEC.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-09 | 2026-07-09 | Wong-Sarad Grace Principal Accounting Officer | AAward | +20.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-17 | Yaffe Kristine Director | AAward | +28.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-17 | GAROFALO ELIZABETH A. Director | AAward | +28.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-17 | Hammond Paula Director | AAward | +28.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-17 | SCHELLER RICHARD H Director | AAward | +28.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-17 | Altmeyer Mark Director | AAward | +28.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-17 | DESOUZA ERROL B Director | AAward | +28.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-17 | LAVIGNE LOUIS J JR Director | AAward | +28.7K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-03 | 2026-06-03 | Wong-Sarad Grace Principal Accounting Officer | SSale | −3.48K | $1.88 | $6.54K | No | Form 4 ↗ |
| 2026-06-03 | 2026-06-02 | Rosenthal Arnon Chief Executive Officer | SSale | −87.2K | $1.97 | $172K | No | Form 4 ↗ |
| 2026-06-03 | 2026-06-02 | Wong-Sarad Grace Principal Accounting Officer | SSale | −5.71K | $1.97 | $11.3K | No | Form 4 ↗ |
| 2026-06-03 | 2026-06-02 | Berkley Neil Lindsay CFO & Chief Business Officer | SSale | −19.4K | $1.97 | $38.2K | No | Form 4 ↗ |
| 2026-06-03 | 2026-06-01 | SCHELLER RICHARD H Director | AAward | +10.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-17 | 2026-04-16 | Wong-Sarad Grace Principal Accounting Officer | SSale | −1.82K | $2.65 | $4.82K | Yes (planned) | Form 4 ↗ |
| 2026-03-13 | 2026-03-15 | Berkley Neil Lindsay CFO & Chief Business Officer | AAward | +54.6K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-13 | Rosenthal Arnon Chief Executive Officer | AAward | +116K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-12 | 2026-03-10 | Wong-Sarad Grace Principal Accounting Officer | SSale | −1.00K | $2.65 | $2.65K | Yes (planned) | Form 4 ↗ |
| 2026-03-03 | 2026-03-03 | Wong-Sarad Grace Principal Accounting Officer | SSale | −3.37K | $2.08 | $7.01K | Yes (planned) | Form 4 ↗ |
| 2026-03-03 | 2026-03-02 | Berkley Neil Lindsay CFO & Chief Business Officer | SSale | −29.6K | $2.12 | $63.0K | No | Form 4 ↗ |
| 2026-03-03 | 2026-03-02 | Wong-Sarad Grace Principal Accounting Officer | SSale | −8.07K | $2.12 | $17.1K | No | Form 4 ↗ |
| 2026-03-03 | 2026-03-02 | Rosenthal Arnon Chief Executive Officer | SSale | −81.9K | $2.12 | $174K | No | Form 4 ↗ |
| 2026-02-26 | 2026-02-26 | Wong-Sarad Grace Principal Accounting Officer | SSale | −4.08K | $2.50 | $10.2K | Yes (planned) | Form 4 ↗ |
| 2024-05-02 | 2024-04-30 | Polaris Venture Management Co. VI, L.L.C. 10% owner | JOther | −98.5K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2024-05-02 | 2024-04-30 | Polaris Venture Management Co. VI, L.L.C., 10% owner | JOther | +98.5K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2024-05-02 | 2024-04-30 | Polaris Venture Management Co. VI, L.L.C., 10% owner | JOther | −500K | $0.00 | $0.00 | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also ALEC’s full analysis or the market-wide insider trading feed. The tabs above jump to ALEC’s other SEC data.
Source: SEC Form 4 filings for ALEC, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.