Clean Harbors, Inc. (CLH) Insider Trading
Over the last 3 months, CLH insiders made 1 open-market buy and 4 sales, a net sale of -$2.0M (SEC Form 4). Over the last 6 months, 408 institutions increased and 421 reduced their position (13F).
Insider Activity
Sentiment
6/100
Buys (3m)
1
Sells (3m)
4
Net (3m)
-$2.0M
Insiders buyingFirst buy in 3 quarters
Insider trades by month Buys Sells
Jun
Aug
Dec
Feb
Mar
May
Context3-month price -1%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| May 27, 2026 | States Laurendirector | Sell | 789 | $286.19 |
| May 22, 2026 | GALANTE EDWARD Gdirector | Grant | 652 | — |
| May 22, 2026 | Willett Robertdirector | Grant | 652 | — |
| May 22, 2026 | Stewart Shelley JRdirector | Grant | 652 | — |
| May 22, 2026 | States Laurendirector | Grant | 652 | — |
| May 22, 2026 | PRESTON JOHN Tdirector | Grant | 652 | — |
| May 22, 2026 | Reed Marcy L.director | Grant | 652 | — |
| May 22, 2026 | Robertson Andreadirector | Grant | 652 | — |
| May 22, 2026 | Polito Karyndirector | Grant | 652 | — |
| May 22, 2026 | Welch John R.director | Grant | 652 | — |
| May 22, 2026 | Quirk Alison A.director | Grant | 652 | — |
| May 14, 2026 | Polito Karyndirector | Buy | 460 | $295.13 |
| May 13, 2026 | Polito Karyndirector | Grant | 460 | $295.13 |
| Mar 19, 2026 | GERSTENBERG ERIC Wofficer: CO-CEO | Sell | 1,000 | $293.00 |
| Mar 19, 2026 | Reed Marcy L.director | Sell | 836 | $287.94 |
| Mar 17, 2026 | GERSTENBERG ERIC Wofficer: CO-CEO | Tax | 977 | $288.93 |
| Mar 17, 2026 | Dugas Eric J.officer: EVP CHIEF FINANCIAL OFFICER | Tax | 630 | $288.93 |
| Mar 17, 2026 | CURTIS GEORGE Lofficer: EXEC. VICE PRESIDENT (CHESI) | Tax | 350 | $288.93 |
| Mar 17, 2026 | Weber Brian Pofficer: EVP (CHESI) | Sell | 4,683 | $293.39 |
| Mar 17, 2026 | Battles Michael Louisdirector, officer: CO-CEO | Tax | 1,148 | $288.93 |
| Mar 17, 2026 | Weber Brian Pofficer: EVP (CHESI) | Tax | 960 | $288.93 |
| Mar 17, 2026 | Gabriel Sharon M.officer: EVP/CIO (CHESI) | Tax | 727 | $288.93 |
| Mar 17, 2026 | Underwood Rebeccaofficer: PRESIDENT & EVP FACILITIES | Tax | 125 | $288.93 |
| Mar 17, 2026 | Harrison Robert W.officer: EVP, EHS | Tax | 18 | $288.93 |
| Mar 17, 2026 | MCKIM ALAN Sdirector, officer: EXEC CHAIR, CTO. | Tax | 1,265 | $288.93 |
| Mar 5, 2026 | MCKIM ALAN Sdirector, officer: EXEC CHAIR, CTO. | Sell | 100,000 | $292.65 |
| Feb 24, 2026 | GERSTENBERG ERIC Wofficer: CO-CEO | Sell | 2,500 | $279.86 |
| Feb 23, 2026 | MCKIM ALAN Sdirector, officer: EXEC CHAIR, CTO. | Sell | 100,000 | $281.14 |
| Feb 20, 2026 | Welch John R.director | Sell | 750 | $273.07 |
| Feb 20, 2026 | Dugas Eric J.officer: EVP CHIEF FINANCIAL OFFICER | Sell | 2,788 | $281.31 |
Source: CLH SEC Form 4 filings, latest May 27, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their CLH positions over the last 6 months (SEC Form 13F).
Increased
408
New positions
181
Reduced
421
Sold out
133
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 5.2M | Feb 17, 2026 |
| BLACKROCK, INC. | Increased | 4.8M | May 13, 2026 |
| BLACKROCK, INC. | Increased | 4.6M | Feb 12, 2026 |
| VANGUARD GROUP INC | Reduced | 4.5M | Jan 29, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 3.6M | May 15, 2026 |
| D1 CAPITAL PARTNERS L.P. | Increased | 2.8M | Feb 17, 2026 |
| JANUS HENDERSON GROUP PLC | Increased | 2.4M | Feb 17, 2026 |
| JANUS HENDERSON GROUP PLC | Reduced | 2.4M | May 18, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.2M | May 15, 2026 |
| FMR LLC | Increased | 2.1M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 2.0M | May 8, 2026 |
| PICTET ASSET MANAGEMENT HOLDING SA | Reduced | 1.9M | Jan 29, 2026 |
| LONE PINE CAPITAL LLC | Increased | 1.8M | May 15, 2026 |
| STATE STREET CORP | Increased | 1.5M | May 15, 2026 |
| STATE STREET CORP | Reduced | 1.5M | Feb 13, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.