Company / CIK 0000822818
CLEAN HARBORS INC
- Ticker
- CLH
- Size, estimated from filings
- Large cap ($10B – $200B)
- Insiders on file
- 21
- Members of Congress who traded it
- 1
- Federal contracts on record
- none matched
- Lobbying filings on record
- 5
- SEC filings
- EDGAR ↗
- Latest trade on record
- August 25, 2026
CLEAN HARBORS INC (CLH) has 21 insiders on file who disclosed 92 transactions in the last 12 months (0 open-market buys, 58 sales, about $72.0M at reported prices), and 8 congressional trades in its stock are on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name, and 3 lobbying filings naming it as client report $270K in 2026.
CLEAN HARBORS INC in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
BoughtSold
8 people account for the disclosed buying and selling in CLEAN HARBORS INC over the last 12 months; the most active is MCKIM ALAN S with $59M.
Lobbying spend by quarter
How much has CLEAN HARBORS INC reported spending on federal lobbying?
CLEAN HARBORS INC reported $450K in lobbying over the last eight quarters, from filings matched by exact company name.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| Willett Robert | Director | 1 | 0 | 0 | October 1, 2026 |
| GERSTENBERG ERIC W | CO-CEO | 10 | 0 | 8 | August 18, 2026 |
| Battles Michael Louis | CO-CEO | 6 | 0 | 4 | August 12, 2026 |
| CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | 5 | 0 | 4 | August 11, 2026 |
| Robertson Andrea | Director | 3 | 0 | 1 | August 3, 2026 |
| MCKIM ALAN S | EXEC CHAIR, CTO. | 6 | 0 | 5 | July 20, 2026 |
| Geer Charles H. II | EVP, Industrial Services | 7 | 0 | 5 | July 6, 2026 |
| Underwood Rebecca | PRESIDENT & EVP FACILITIES | 7 | 0 | 5 | July 6, 2026 |
| Gabriel Sharon M. | EVP/CIO (CHESI) | 8 | 0 | 6 | July 6, 2026 |
| Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | 7 | 0 | 5 | July 6, 2026 |
| Weber Brian P | EVP (CHESI) | 7 | 0 | 5 | July 6, 2026 |
| Polito Karyn | Director | 2 | 0 | 0 | June 24, 2026 |
| Diderich Jeroen | EVP&President of Sales&Service | 4 | 0 | 2 | June 3, 2026 |
| Stewart Shelley JR | Director | 1 | 0 | 0 | May 29, 2026 |
| States Lauren | Director | 3 | 0 | 1 | May 27, 2026 |
| Welch John R. | Director | 3 | 0 | 1 | May 22, 2026 |
| Reed Marcy L. | Director | 2 | 0 | 1 | May 22, 2026 |
| GALANTE EDWARD G | Director | 1 | 0 | 0 | May 22, 2026 |
| PRESTON JOHN T | Director | 1 | 0 | 0 | May 22, 2026 |
| Quirk Alison A. | Director | 1 | 0 | 0 | May 22, 2026 |
| Harrison Robert W. | EVP, EHS | 7 | 0 | 5 | March 17, 2026 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded CLH
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the CLH page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| April McClain Delaney | Representative (MD, District 6), Democrat | 8 | 2 | 6 | $71K–$240K | August 25, 2026 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| GERSTENBERG ERIC W | CLH | Sell S | August 14, 2026 | August 18, 2026 | 4d | 2,500 | $321 | $803K | Form 4 ↗ | ||
| Battles Michael Louis | CLH | Sell F | July 1, 2026 | August 12, 2026 | 42d | 1,032 | $291 | $300K | late | Form 4 ↗ | |
| CURTIS GEORGE L | CLH | Sell F | July 1, 2026 | August 11, 2026 | 41d | 1,757 | $291 | $511K | late | Form 4 ↗ | |
| Robertson Andrea | CLH | Sell S | August 3, 2026 | August 3, 2026 | 0d | 789 | $314 | $248K | Form 4 ↗ | ||
| MCKIM ALAN S | CLH | Sell F | July 17, 2026 | July 20, 2026 | 3d | 1,265 | $311 | $393K | Form 4 ↗ | ||
| Gabriel Sharon M. | CLH | Sell F | July 1, 2026 | July 6, 2026 | 5d | 359 | $291 | $104K | late | Form 4 ↗ | |
| Weber Brian P | CLH | Sell F | July 1, 2026 | July 6, 2026 | 5d | 814 | $291 | $237K | late | Form 4 ↗ | |
| Underwood Rebecca | CLH | Sell F | July 1, 2026 | July 6, 2026 | 5d | 311 | $291 | $90K | late | Form 4 ↗ | |
| MCKIM ALAN S | CLH | Sell F | July 1, 2026 | July 6, 2026 | 5d | 1,343 | $291 | $390K | late | Form 4 ↗ | |
| GERSTENBERG ERIC W | CLH | Sell F | July 1, 2026 | July 6, 2026 | 5d | 564 | $291 | $164K | late | Form 4 ↗ | |
| Geer Charles H. II | CLH | Sell F | July 1, 2026 | July 6, 2026 | 5d | 40 | $291 | $12K | late | Form 4 ↗ | |
| Dugas Eric J. | CLH | Sell F | July 1, 2026 | July 6, 2026 | 5d | 447 | $291 | $130K | late | Form 4 ↗ | |
| Diderich Jeroen | CLH | Sell F | June 1, 2026 | June 3, 2026 | 2d | 1,717 | $281 | $482K | Form 4 ↗ | ||
| States Lauren | CLH | Sell S | May 26, 2026 | May 27, 2026 | 1d | 789 | $286 | $226K | Form 4 ↗ | ||
| Willett Robert | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| Welch John R. | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| Stewart Shelley JR | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| States Lauren | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| Robertson Andrea | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| Reed Marcy L. | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| Quirk Alison A. | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| PRESTON JOHN T | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| GALANTE EDWARD G | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| Polito Karyn | CLH | Other A | May 20, 2026 | May 22, 2026 | 2d | 652 | — | — | Form 4 ↗ | ||
| Polito Karyn | CLH | Other A | May 11, 2026 | May 13, 2026 | 2d | 460 | $295 | $136K | Form 4 ↗ | ||
| Robertson Andrea | CLH | Other G | May 11, 2026 | May 12, 2026 | 1d | 342 | — | — | Form 4 ↗ | ||
| GERSTENBERG ERIC W | CLH | Sell S | March 18, 2026 | March 19, 2026 | 1d | 1,000 | $293 | $293K | Form 4 ↗ | ||
| Reed Marcy L. | CLH | Sell S | March 18, 2026 | March 19, 2026 | 1d | 836 | $288 | $241K | Form 4 ↗ | ||
| Weber Brian P | CLH | Sell S | March 17, 2026 | March 17, 2026 | 0d | 4,683 | $293 | $1.4M | Form 4 ↗ | ||
| Weber Brian P | CLH | Sell D | March 13, 2026 | March 17, 2026 | 4d | 1,869 | — | — | Form 4 ↗ | ||
| Weber Brian P | CLH | Sell F | March 13, 2026 | March 17, 2026 | 4d | 960 | $289 | $277K | Form 4 ↗ | ||
| Underwood Rebecca | CLH | Sell D | March 13, 2026 | March 17, 2026 | 4d | 1,401 | — | — | Form 4 ↗ | ||
| Underwood Rebecca | CLH | Sell F | March 13, 2026 | March 17, 2026 | 4d | 125 | $289 | $36K | Form 4 ↗ | ||
| Gabriel Sharon M. | CLH | Sell D | March 13, 2026 | March 17, 2026 | 4d | 1,401 | — | — | Form 4 ↗ | ||
| Gabriel Sharon M. | CLH | Sell F | March 13, 2026 | March 17, 2026 | 4d | 727 | $289 | $210K | Form 4 ↗ | ||
| GERSTENBERG ERIC W | CLH | Sell D | March 13, 2026 | March 17, 2026 | 4d | 2,166 | — | — | Form 4 ↗ | ||
| GERSTENBERG ERIC W | CLH | Sell F | March 13, 2026 | March 17, 2026 | 4d | 977 | $289 | $282K | Form 4 ↗ | ||
| Harrison Robert W. | CLH | Sell D | March 13, 2026 | March 17, 2026 | 4d | 368 | — | — | Form 4 ↗ | ||
| Harrison Robert W. | CLH | Sell F | March 13, 2026 | March 17, 2026 | 4d | 18 | $289 | $5,201 | Form 4 ↗ | ||
| Geer Charles H. II | CLH | Sell D | March 13, 2026 | March 17, 2026 | 4d | 139 | — | — | Form 4 ↗ | ||
| Dugas Eric J. | CLH | Sell D | March 13, 2026 | March 17, 2026 | 4d | 1,324 | — | — | Form 4 ↗ | ||
| Dugas Eric J. | CLH | Sell F | March 13, 2026 | March 17, 2026 | 4d | 630 | $289 | $182K | Form 4 ↗ | ||
| CURTIS GEORGE L | CLH | Sell D | March 13, 2026 | March 17, 2026 | 4d | 1,028 | — | — | Form 4 ↗ | ||
| CURTIS GEORGE L | CLH | Sell F | March 13, 2026 | March 17, 2026 | 4d | 350 | $289 | $101K | Form 4 ↗ | ||
| MCKIM ALAN S | CLH | Sell F | March 13, 2026 | March 17, 2026 | 4d | 1,265 | $289 | $365K | Form 4 ↗ | ||
| Battles Michael Louis | CLH | Sell D | March 13, 2026 | March 17, 2026 | 4d | 2,166 | — | — | Form 4 ↗ | ||
| Battles Michael Louis | CLH | Sell F | March 13, 2026 | March 17, 2026 | 4d | 1,148 | $289 | $332K | Form 4 ↗ | ||
| MCKIM ALAN S | CLH | Sell S | March 4, 2026 | March 5, 2026 | 1d | 100,000 | $293 | $29.3M | indirect | Form 4 ↗ | |
| GERSTENBERG ERIC W | CLH | Sell S | February 23, 2026 | February 24, 2026 | 1d | 2,500 | $280 | $700K | Form 4 ↗ | ||
| MCKIM ALAN S | CLH | Other G | February 19, 2026 | February 23, 2026 | 4d | 10,000 | — | — | indirect | Form 4 ↗ | |
| MCKIM ALAN S | CLH | Sell S | February 19, 2026 | February 23, 2026 | 4d | 100,000 | $281 | $28.1M | indirect | Form 4 ↗ | |
| Gabriel Sharon M. | CLH | Sell S | February 20, 2026 | February 20, 2026 | 0d | 3,540 | $282 | $999K | Form 4 ↗ | ||
| Dugas Eric J. | CLH | Sell S | February 20, 2026 | February 20, 2026 | 0d | 2,788 | $281 | $784K | Form 4 ↗ | ||
| Welch John R. | CLH | Sell S | February 19, 2026 | February 20, 2026 | 1d | 750 | $273 | $205K | Form 4 ↗ | ||
| Battles Michael Louis | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 10,690 | — | — | Form 4 ↗ | ||
| Battles Michael Louis | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 10,290 | — | — | Form 4 ↗ | ||
| Battles Michael Louis | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 5,205 | $260 | $1.4M | Form 4 ↗ | ||
| Weber Brian P | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 1,056 | — | — | Form 4 ↗ | ||
| Weber Brian P | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 3,166 | — | — | Form 4 ↗ | ||
| Weber Brian P | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 1,394 | $260 | $362K | Form 4 ↗ | ||
| Underwood Rebecca | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 838 | — | — | Form 4 ↗ | ||
| Underwood Rebecca | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 2,513 | — | — | Form 4 ↗ | ||
| Underwood Rebecca | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 425 | $260 | $110K | Form 4 ↗ | ||
| Harrison Robert W. | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 430 | — | — | Form 4 ↗ | ||
| Harrison Robert W. | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 1,003 | — | — | Form 4 ↗ | ||
| Harrison Robert W. | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 184 | $260 | $48K | Form 4 ↗ | ||
| GERSTENBERG ERIC W | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 10,690 | — | — | Form 4 ↗ | ||
| GERSTENBERG ERIC W | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 10,290 | — | — | Form 4 ↗ | ||
| GERSTENBERG ERIC W | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 4,934 | $260 | $1.3M | Form 4 ↗ | ||
| Geer Charles H. II | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 503 | — | — | Form 4 ↗ | ||
| Geer Charles H. II | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 1,843 | — | — | Form 4 ↗ | ||
| Geer Charles H. II | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 197 | $260 | $51K | Form 4 ↗ | ||
| Gabriel Sharon M. | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 566 | — | — | Form 4 ↗ | ||
| Gabriel Sharon M. | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 2,073 | — | — | Form 4 ↗ | ||
| Gabriel Sharon M. | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 508 | $260 | $132K | Form 4 ↗ | ||
| Dugas Eric J. | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 1,022 | — | — | Form 4 ↗ | ||
| Dugas Eric J. | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 3,066 | — | — | Form 4 ↗ | ||
| Dugas Eric J. | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 567 | $260 | $147K | Form 4 ↗ | ||
| Diderich Jeroen | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 1,047 | — | — | Form 4 ↗ | ||
| Diderich Jeroen | CLH | Other A | February 1, 2026 | February 3, 2026 | 2d | 3,141 | — | — | Form 4 ↗ | ||
| Diderich Jeroen | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 105 | $260 | $27K | Form 4 ↗ | ||
| CURTIS GEORGE L | CLH | Sell F | February 2, 2026 | February 3, 2026 | 1d | 249 | $260 | $65K | Form 4 ↗ | ||
| Gabriel Sharon M. | CLH | Sell F | January 2, 2026 | January 5, 2026 | 3d | 525 | $234 | $123K | Form 4 ↗ | ||
| Welch John R. | CLH | Other G | December 17, 2025 | December 29, 2025 | 12d | 415 | — | — | late | Form 4 ↗ | |
| Underwood Rebecca | CLH | Sell F | December 15, 2025 | December 17, 2025 | 2d | 51 | $241 | $12K | Form 4 ↗ | ||
| Harrison Robert W. | CLH | Sell F | December 15, 2025 | December 17, 2025 | 2d | 16 | $241 | $3,851 | Form 4 ↗ | ||
| Geer Charles H. II | CLH | Sell F | December 15, 2025 | December 17, 2025 | 2d | 28 | $241 | $6,740 | Form 4 ↗ | ||
| GERSTENBERG ERIC W | CLH | Sell S | December 16, 2025 | December 17, 2025 | 1d | 601 | $241 | $145K | Form 4 ↗ | ||
| CURTIS GEORGE L | CLH | Other G | December 9, 2025 | December 11, 2025 | 2d | 1,000 | — | — | Form 4 ↗ | ||
| Harrison Robert W. | CLH | Sell F | December 1, 2025 | December 3, 2025 | 2d | 122 | $229 | $28K | Form 4 ↗ | ||
| States Lauren | CLH | Other G | November 13, 2025 | November 14, 2025 | 1d | 245 | — | — | Form 4 ↗ | ||
| Geer Charles H. II | CLH | Sell F | November 1, 2025 | November 4, 2025 | 3d | 294 | $211 | $62K | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "CLEAN HARBORS INC". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
| Period | Registrant | Primary issue | Amount | Source |
|---|---|---|---|---|
| 2026 Q3 | SQUIRE PATTON BOGGS | Environment/Superfund | $90,000 | LDA ↗ |
| 2026 Q2 | SQUIRE PATTON BOGGS | Environment/Superfund | $90,000 | LDA ↗ |
| 2026 Q1 | SQUIRE PATTON BOGGS | Aviation/Airlines/Airports | $90,000 | LDA ↗ |
| 2025 Q4 | SQUIRE PATTON BOGGS | Aviation/Airlines/Airports | $90,000 | LDA ↗ |
| 2025 Q3 | SQUIRE PATTON BOGGS | Aviation/Airlines/Airports | $90,000 | LDA ↗ |
Related companies
Companies whose stock was traded by the same people who traded CLH, by number of filers in common. It shows overlap in public filings and nothing else.
- TransDigm Group INC TDG 1 filer in common
- Morningstar, Inc. MORN 1 filer in common
- LABCORP HOLDINGS INC. LH 1 filer in common
- IDEXX LABORATORIES INC /DE IDXX 1 filer in common
- WESTINGHOUSE AIR BRAKE TECHNOLOGIES CORP WAB 1 filer in common
- Liberty Media Corp FWONK 1 filer in common
- Otis Worldwide Corp OTIS 1 filer in common
- BWX Technologies, Inc. BWXT 1 filer in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Lobbying disclosure reports Reports are due about 20 days after each quarter ends.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 6 | 8 | January 5, 2026 | September 9, 2026 | House Clerk search |
| SEC EDGAR, Form 4 | 64 | 92 | November 4, 2025 | August 18, 2026 | Form 4 list on EDGAR |
| Lobbying disclosure filings | 5 filings | — | — | — | LDA.gov search |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.