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sellNotable cluster of 7

Alan S McKim sold $29M of CLH

EXEC CHAIR, CTO. at CLEAN HARBORS INC. 100,000 shares at an average of $292.65, traded Mar 4, 2026, filed Mar 5, 2026.

Warning score
60
Value
$29M
100,000 shares
Holdings after
2,065,368
-5% from before
From 52-week low
+61%
low $182.10, close $293.00
From 52-week high
-1%
high $297.15, as of Mar 4, 2026

Score components

  • Role
    Chair
    +20
  • Trade size
    $29.3M at market
    +25
  • Share of holdings sold
    Sold 4.6% of holdings
    0
  • Cluster
    7 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.

CLHOct 9, 2026 · close 316.93
Since filing Mar 5, 2026: +9.4%SPY +15.2% · excess -5.8%

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 0001024547-26-000006, as filed. Open on EDGAR

DateTransactionSharesPriceValueHoldings afterFiled
Mar 4, 2026SOpen-market sale
Common Stockindirect: McKim 2007 Trust
-100,000$292.65$29M2,065,368Mar 5, 2026

Related signals

Other insiders at CLEAN HARBORS INC and this insider’s other filings.

ScoreCompanyInsiderValueHoldingsFiled
54Moderate
CLHsell 4
CLEAN HARBORS INC
Eric W Gerstenberg
CO-CEO
$293k
1,000 shares
-3%
48Moderate
CLHsell 4
CLEAN HARBORS INC
Marcy L. Reed
director
$241k
836 shares
-14%
55Moderate
CLHsell 4
CLEAN HARBORS INC
Brian P Weber
EVP (CHESI)
$1.4M
4,683 shares
-9%
61Notable
CLHsell 5
CLEAN HARBORS INC
Eric W Gerstenberg
CO-CEO
$700k
2,500 shares
-5%
60Notable
CLHsell 5
CLEAN HARBORS INC
Alan S McKim
EXEC CHAIR, CTO.
$28M
100,000 shares
-4%
42Moderate
CLHsell 5
CLEAN HARBORS INC
John R. Welch
director
$205k
750 shares
-7%
64Notable
CLHsell 5
CLEAN HARBORS INC
Eric J. Dugas
EVP CHIEF FINANCIAL OFFICER
$784k
2,788 shares
-15%
60Notable
CLHsell 5
CLEAN HARBORS INC
Sharon M. Gabriel
EVP/CIO (CHESI)
$999k
3,540 shares
-13%
36Weak
CLHsell
CLEAN HARBORS INC
Eric W Gerstenberg
CO-CEO
$145k
601 shares
-1%
42Moderate
CLHbuy
CLEAN HARBORS INC
Michael Louis Battles
CO-CEO
$467k
2,000 shares
+2%

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.

Alan S McKim sold $29M of CLH | InsiderTell