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sellModerate cluster of 4

Arnon Rosenthal sold $59k of ALEC

Chief Executive Officer at Alector, Inc.. 40,330 shares at an average of $1.47, traded Mar 3, 2025, filed Mar 5, 2025.

Warning score
47
Value
$59k
40,330 shares
Holdings after
2,466,744
-2% from before
From 52-week low
0%
low $1.41, close $1.41
From 52-week high
-77%
high $6.14, as of Mar 3, 2025

Score components

  • Role
    CEO
    +25
  • Trade size
    $59k at market
    +7
  • Share of holdings sold
    Sold 1.6% of holdings
    0
  • Cluster
    4 insiders selling within 14 days
    +15

What happened after comparable sells

Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.

This signal so far: 1m -34.2%, 3m 0.0%, 6m +80.0%.

Price around the trade, and since

From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.

ALECOct 9, 2026 · close 2.08
Since filing Mar 5, 2025: +34.2%SPY +36.2% · excess -2.0%

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™

Rows in this filing

Every transaction in Form 4 0000950170-25-033530, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 3, 2025SOpen-market sale
Common Stock
-40,330$1.47$59k2,466,744Mar 5, 2025

Related signals

Other insiders at Alector, Inc. and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
46Moderate
ALECsell 3
Alector, Inc.
Neil Lindsay Berkley
CFO & Chief Business Officer
$78k
29,251 shares
-8%
52Moderate
ALECsell 3
Alector, Inc.
Arnon Rosenthal
Chief Executive Officer
$193k
72,606 shares
-3%
10Weak
ALECsell 310b5-1
Alector, Inc.
Grace Wong-Sarad
Principal Accounting Officer
$25k
9,446 shares
-8%
43Moderate
ALECsell 3
Alector, Inc.
Neil Lindsay Berkley
CFO & Chief Business Officer
$38k
19,360 shares
-5%
10Weak
ALECsell 310b5-1
Alector, Inc.
Grace Wong-Sarad
Principal Accounting Officer
$18k
9,184 shares
-9%
51Moderate
ALECsell 3
Alector, Inc.
Arnon Rosenthal
Chief Executive Officer
$172k
87,216 shares
-4%
0Weak
ALECsell10b5-1
Alector, Inc.
Grace Wong-Sarad
Principal Accounting Officer
$4,823
1,820 shares
-2%
10Weak
ALECsell 310b5-1
Alector, Inc.
Grace Wong-Sarad
Principal Accounting Officer
$2,650
1,000 shares
-1%
51Moderate
ALECsell 3
Alector, Inc.
Arnon Rosenthal
Chief Executive Officer
$174k
81,864 shares
-3%
30Weak
ALECsell 3
Alector, Inc.
Grace Wong-Sarad
Principal Accounting Officer
$17k
8,071 shares
-7%

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

Arnon Rosenthal sold $59k of ALEC | InsiderTell