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sellNotable cluster of 5

Justin B. Klee sold $980k of AMLX

Co-Chief Executive Officer at Amylyx Pharmaceuticals, Inc.. 30,464 shares at an average of $32.18, traded Sep 10, 2026, filed Sep 14, 2026.

Warning score
65
Value
$980k
30,464 shares
Holdings after
3,613,056
-1% from before
From 52-week low
+182%
low $11.38, close $32.09
From 52-week high
-19%
high $39.66, as of Sep 10, 2026

Score components

  • Role
    CEO
    +25
  • Trade size
    $980k at market
    +25
  • Share of holdings sold
    Sold 0.8% of holdings
    0
  • Cluster
    5 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.

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.

AMLXOct 9, 2026 · close 28.14
Since filing Sep 14, 2026: -16.3%SPY +2.6% · excess -18.9%

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 0001193125-26-390506, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Sep 10, 2026SOpen-market sale
Common Stock
-29,025$32.13$933k3,614,49528 d ago
Sep 10, 2026SOpen-market sale
Common Stock
-1,439$33.16$48k3,613,05628 d ago

Related signals

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

ScoreCompanyInsiderValueHoldingsFiled
18Weak
AMLXsell10b5-1
Amylyx Pharmaceuticals, Inc.
George M Milne Jr
director
$831k
30,000 shares
-4%
65Notable
AMLXsell 5
Amylyx Pharmaceuticals, Inc.
Joshua B Cohen
Co-Chief Executive Officer
$981k
30,464 shares
-1%
44Moderate
AMLXsell 5
Amylyx Pharmaceuticals, Inc.
Gina Mazzariello
Chief Legal Officer
$310k
9,536 shares
-5%
52Moderate
AMLXsell 5
Amylyx Pharmaceuticals, Inc.
James M Frates
Chief Financial Officer
$350k
10,810 shares
-4%
44Moderate
AMLXsell 5
Amylyx Pharmaceuticals, Inc.
Camille L Bedrosian
Chief Medical Officer
$325k
10,028 shares
-3%
13Weak
AMLXsell10b5-1
Amylyx Pharmaceuticals, Inc.
Gina Mazzariello
Chief Legal Officer
$246k
30,000 shares
-16%
48Moderate
AMLXsell 5
Amylyx Pharmaceuticals, Inc.
Justin B. Klee
Co-Chief Executive Officer
$74k
21,490 shares
-1%
48Moderate
AMLXsell 5
Amylyx Pharmaceuticals, Inc.
Joshua B Cohen
Co-Chief Executive Officer
$74k
21,490 shares
-1%
35Weak
AMLXsell 5
Amylyx Pharmaceuticals, Inc.
Gina Mazzariello
Chief Legal Officer
$32k
9,192 shares
-5%
36Weak
AMLXsell 5
Amylyx Pharmaceuticals, Inc.
Camille L Bedrosian
Chief Medical Officer
$43k
12,425 shares
-6%

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.

Justin B. Klee sold $980k of AMLX | InsiderTell