About this page
Insider trades reported on SEC Form 4: when the people who run a company buy or sell its shares with their own money.
How to read it
- Form 4
- The form a company insider (officer, director or owner of more than 10%) must file with the SEC within two business days of buying or selling the company's shares.
- Buy (P) and Sell (S)
- Open-market purchases and sales. Gifts, option exercises and automatic tax withholding are left out because they say little about what the insider thinks.
- Value
- Shares times price, as reported on the filing.
- 10b5-1
- A trade made under a plan set up in advance. Planned sales are common and usually say less than an unplanned purchase.
- Late filing
- A Form 4 filed more than two business days after the trade.
- Vs. S&P 500
- How the stock did after the trade minus how the overall market did in the same weeks.
A real example
In January 2016, when bank stocks were falling, JPMorgan Chase CEO Jamie Dimon bought 500,000 JPMorgan shares with his own money, worth about $26 million. His Form 4 made the purchase public within days, and investors read it as a strong sign of confidence.
Explain it like I'm 13
If the coach of a team bets his own allowance that his team will win, that tells you something. A Form 4 is the note a company boss must hand in whenever he buys or sells his own company's shares, so everyone can see it.
Data from public SEC filings and congressional reports. Information, not investment advice. Check every number against the filing linked on the page.
Alector, Inc. (ALEC): Insider Trades and Fund Holdings
In the past 12 months, Alector, Inc. insiders reported 0 open-market purchases worth $0 and 5 sales worth $296K; 0 of the sales were reported as made under a 10b5-1 trading plan.
Timeline: news and trades
Company filings (8-K), insider trades, notices of planned sales (Form 144) and fund moves in the past year, newest first.
- Oct 16, 2026NewsCompany reported: Signed a material agreement
- Oct 14, 2026NewsCompany reported: Executive or director change
- Oct 5, 2026NewsCompany reported: Signed a material agreement; Quarterly or annual results
- Sep 4, 2026Insider salePrincipal Accounting Officer Grace Wong-Sarad sold $9,094
- Sep 4, 2026Planned saleGRACE WONG-SARAD (officer) filed notice to sell about $9,094 around Sep 4, 2026
- Sep 3, 2026Insider saleCEO Arnon Rosenthal sold $193,473
- Sep 3, 2026Insider saleCFO Neil Lindsay Berkley sold $77,948
- Sep 3, 2026Insider salePrincipal Accounting Officer Grace Wong-Sarad sold $13,767
- Sep 2, 2026Insider salePrincipal Accounting Officer Grace Wong-Sarad sold $1,804
- Sep 2, 2026Planned saleGRACE WONG-SARAD (officer) filed notice to sell about $1,804 around Sep 2, 2026
- Sep 1, 2026Planned saleArnon Rosenthal (officer, director) filed notice to sell about $191,285 around Sep 2, 2026
- Sep 1, 2026Planned saleNeil L. Berkley (officer) filed notice to sell about $77,047 around Sep 2, 2026
- Sep 1, 2026Planned saleGrace Wong-Sarad (officer) filed notice to sell about $13,589 around Sep 2, 2026
- Jun 30, 2026FundRenaissance Technologies cut 27% in Q2 2026 (13F filed Aug 13, 2026)
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 4, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Sep 4 | Arnon RosenthalCEO | ▼ SELL | $193K |
| Sep 4 | Neil Lindsay BerkleyCFO | ▼ SELL | $78K |
| Sep 4 | Grace Wong-SaradPrincipal Accounting Officer | ▼ SELL | $14K |
| Sep 4 | Grace Wong-SaradPrincipal Accounting Officer | ▼ SELL | $9K |
| Sep 4 | Grace Wong-SaradPrincipal Accounting Officer | ▼ SELL | $2K |
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Arnon Rosenthal | CEO | 0 | $0 | 1 | $193K |
| Neil Lindsay Berkley | CFO | 0 | $0 | 1 | $78K |
| Grace Wong-Sarad | Principal Accounting Officer | 0 | $0 | 3 | $25K |
Buybacks and executive pay
| Year | CEO pay reported | CEO pay "actually paid" | Value of $100 invested |
|---|---|---|---|
| 2025 | $2.00M | $1.86M | n/a |
| 2024 | $3.67M | −$1.85M | n/a |
| 2023 | $4.26M | $3.23M | n/a |
From the company's XBRL data filed with the SEC. "Actually paid" is the SEC's pay-versus-performance measure, which counts changes in the value of stock awards. "Value of $100 invested" is the company's cumulative shareholder return as reported, usually measured from five years earlier. See all buybacks and CEO pay across companies.
Tracked funds that report ALEC
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 935,166 | $1.88M | ▼ −27.4% |
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →