CLEAN HARBORS INC Insider Trading Activity
Every SEC Form 4 insider transaction reported for CLEAN HARBORS INC (CLH), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are CLH insiders buying or selling?
In the last 12 months, CLEAN HARBORS INC insiders reported 1 open-market purchase ($135.8K) and 16 sales ($65.2M) — net selling of $65.0M. Since March 2018, Trabud has recorded 170 Form 4 filings for CLH: 7 buys ($1.2M) and 163 sells ($240.5M).
Source: SEC EDGAR Form 4
What stands out
- The largest open-market purchase in the last 12 months was $135.8K by Karyn Polito (Director) on May 14, 2026. SEC ↗
- The most recent open-market purchase was reported on May 14, 2026 (5 months ago).
Key Statistics (March 2018 – Aug 18, 2026)
Total Form 4 filings
170
SEC EDGAR
Insider filers
26
Insider buys (7)
$1.2M
Insider sells (163)
$240.5M
Insider sentiment
Net sellingNet insider flow of $239.3M in net selling since March 2018, and $65.0M in net selling over the last 12 months.
Recent CLH insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Aug 18, 2026 | Eric W Gerstenberg | CO-CEO | Sale | 2.5K | $321.34 | $803.4K | SEC ↗ |
| Aug 14, 2026 | Eric W Gerstenberg | CO-CEO | Sale | 1.0K | $293.00 | $293.0K | SEC ↗ |
| Aug 14, 2026 | Eric W Gerstenberg | CO-CEO | Sale | 2.5K | $279.86 | $699.6K | SEC ↗ |
| Aug 14, 2026 | Eric J. Dugas | EVP CHIEF FINANCIAL OFFICER | Sale | 2.8K | $281.31 | $784.3K | SEC ↗ |
| Aug 3, 2026 | Andrea Robertson | Director | Sale | 789 | $314.01 | $247.8K | SEC ↗ |
| May 27, 2026 | Lauren States | Director | Sale | 789 | $286.19 | $225.8K | SEC ↗ |
| May 14, 2026 | Karyn Polito | Director | Purchase | 460 | $295.13 | $135.8K | SEC ↗ |
| Mar 19, 2026 | Eric W Gerstenberg | CO-CEO | Sale | 1.0K | $293.00 | $293.0K | SEC ↗ |
| Mar 19, 2026 | Marcy L. Reed | Director | Sale | 836 | $287.94 | $240.7K | SEC ↗ |
| Mar 17, 2026 | Brian P Weber | EVP (CHESI) | Sale | 4.7K | $293.39 | $1.4M | SEC ↗ |
| Mar 5, 2026 | Alan S Mckim | EXEC CHAIR, CTO. | Sale | 100.0K | $292.65 | $29.3M | SEC ↗ |
| Feb 24, 2026 | Eric W Gerstenberg | CO-CEO | Sale | 2.5K | $279.86 | $699.6K | SEC ↗ |
| Feb 23, 2026 | Alan S Mckim | EXEC CHAIR, CTO. | Sale | 100.0K | $281.14 | $28.1M | SEC ↗ |
| Feb 20, 2026 | Sharon M. Gabriel | EVP/CIO (CHESI) | Sale | 3.5K | $282.07 | $998.5K | SEC ↗ |
| Feb 20, 2026 | Eric J. Dugas | EVP CHIEF FINANCIAL OFFICER | Sale | 2.8K | $281.31 | $784.3K | SEC ↗ |
| Feb 20, 2026 | John R. Welch | Director | Sale | 750 | $273.07 | $204.8K | SEC ↗ |
| Dec 17, 2025 | Eric W Gerstenberg | CO-CEO | Sale | 601 | $240.90 | $144.8K | SEC ↗ |
| Aug 4, 2025 | Andrea Robertson | Director | Sale | 836 | $233.64 | $195.3K | SEC ↗ |
| Aug 4, 2025 | Michael Louis Battles | CO-CEO | Purchase | 2.0K | $233.50 | $467.0K | SEC ↗ |
| Jun 16, 2025 | Brian P Weber | EVP (CHESI) | Sale | 3.0K | $227.17 | $689.5K | SEC ↗ |
| Jun 9, 2025 | Eric W Gerstenberg | CO-CEO | Sale | 8.1K | $225.23 | $1.8M | SEC ↗ |
| Jun 6, 2025 | Alan S Mckim | EXEC CHAIR, CTO. | Sale | 100.0K | $224.47 | $22.4M | SEC ↗ |
| Jun 6, 2025 | Alison A. Quirk | Director | Sale | 893 | $223.69 | $199.8K | SEC ↗ |
| May 29, 2025 | John R. Welch | Director | Sale | 1.3K | $228.51 | $285.6K | SEC ↗ |
| May 28, 2025 | Robert Speights | PRESIDENT, INDUSTRIAL SERVICES | Sale | 1.0K | $228.49 | $233.5K | SEC ↗ |
Showing the 25 most recent of 170 Form 4 filings for CLEAN HARBORS INC.
Most active CLH insiders
- Alan S Mckim24 filings
- Eric W Gerstenberg17 filings
- Eric J. Dugas15 filings
- Michael Louis Battles15 filings
- Andrea Robertson14 filings
Ask anything about CLH insider activity
Use Trabud's AI agent to query CLEAN HARBORS INC's Form 4 history in plain English — "Show me CLH CEO purchases this year" or compare it against any other ticker.
Open the AI agentCLH insider trading FAQ
Are CLEAN HARBORS INC insiders buying or selling?
In the last 12 months, CLEAN HARBORS INC insiders reported 1 open-market purchase ($135.8K) and 16 sales ($65.2M) — net selling of $65.0M. Since March 2018, Trabud has recorded 170 Form 4 filings for CLH: 7 buys ($1.2M) and 163 sells ($240.5M). Over the full record that is net selling of $239.3M.
How many insiders trade CLH stock?
26 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for CLEAN HARBORS INC. The most recent filing was accepted on Aug 18, 2026.
Where does Trabud get CLH insider trading data?
All CLH insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.