Clean Harbors Inc. (CLH) Insider Trading
Directors, officers and holders of more than 10% of CLH report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.
Recent Form 4 transactions
The 50 most recent of 201 transactions on file: 2 with code P, 6 with code S and 42 with other codes.
| Date | Insider | Title | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Nov 2, 2026 | Geer Charles H. II | EVP, Industrial Services | F Tax Payment | 294 | $302.12 | $88,823 |
| Oct 29, 2026 | Polito Karyn | Director | P Purchase | 125 | $314.83 | $39,354 |
| Aug 14, 2026 | GERSTENBERG ERIC W | CO-CEO | S Sale | 2,500 | $321.34 | $803,350 |
| Aug 3, 2026 | Robertson Andrea | Director | S Sale | 789 | $314.01 | $247,754 |
| Jul 17, 2026 | MCKIM ALAN S | EXEC CHAIR, CTO. | F Tax Payment | 1,265 | $310.58 | $392,884 |
| Jul 1, 2026 | GERSTENBERG ERIC W | CO-CEO | F Tax Payment | 564 | $290.74 | $163,977 |
| Jul 1, 2026 | Weber Brian P | EVP (CHESI) | F Tax Payment | 814 | $290.74 | $236,662 |
| Jul 1, 2026 | Geer Charles H. II | EVP, Industrial Services | F Tax Payment | 40 | $290.74 | $11,630 |
| Jul 1, 2026 | Battles Michael Louis | CO-CEO | F Tax Payment | 1,032 | $290.74 | $300,044 |
| Jul 1, 2026 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | F Tax Payment | 311 | $290.74 | $90,420 |
| Jul 1, 2026 | MCKIM ALAN S | EXEC CHAIR, CTO. | F Tax Payment | 1,343 | $290.74 | $390,464 |
| Jul 1, 2026 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | F Tax Payment | 1,757 | $290.74 | $510,830 |
| Jul 1, 2026 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | F Tax Payment | 447 | $290.74 | $129,961 |
| Jul 1, 2026 | Gabriel Sharon M. | EVP/CIO (CHESI) | F Tax Payment | 359 | $290.74 | $104,376 |
| Jun 1, 2026 | Diderich Jeroen | EVP&President of Sales&Service | F Tax Payment | 1,717 | $281.00 | $482,477 |
| May 26, 2026 | States Lauren | Director | S Sale | 789 | $286.19 | $225,804 |
| May 20, 2026 | Willett Robert | Director | A Award | 652 | Not measured | Not measured |
| May 20, 2026 | Welch John R. | Director | A Award | 652 | Not measured | Not measured |
| May 20, 2026 | Quirk Alison A. | Director | A Award | 652 | Not measured | Not measured |
| May 20, 2026 | Reed Marcy L. | Director | A Award | 652 | Not measured | Not measured |
| May 20, 2026 | Stewart Shelley JR | Director | A Award | 652 | Not measured | Not measured |
| May 20, 2026 | Robertson Andrea | Director | A Award | 652 | Not measured | Not measured |
| May 20, 2026 | Polito Karyn | Director | A Award | 652 | Not measured | Not measured |
| May 20, 2026 | GALANTE EDWARD G | Director | A Award | 652 | Not measured | Not measured |
| May 20, 2026 | PRESTON JOHN T | Director | A Award | 652 | Not measured | Not measured |
| May 20, 2026 | States Lauren | Director | A Award | 652 | Not measured | Not measured |
| May 11, 2026 | Polito Karyn | Director | P Purchase | 460 | $295.13 | $135,760 |
| May 11, 2026 | Polito Karyn | Director | A Award | 460 | $295.13 | $135,760 |
| May 11, 2026 | Robertson Andrea | Director | G Gift | 342 | Not measured | Not measured |
| Mar 18, 2026 | GERSTENBERG ERIC W | CO-CEO | S Sale | 1,000 | $293.00 | $293,000 |
| Mar 18, 2026 | Reed Marcy L. | Director | S Sale | 836 | $287.94 | $240,718 |
| Mar 17, 2026 | Weber Brian P | EVP (CHESI) | S Sale | 4,683 | $293.39 | $1,373,945 |
| Mar 13, 2026 | Harrison Robert W. | EVP, EHS | F Tax Payment | 18 | $288.93 | $5,201 |
| Mar 13, 2026 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | F Tax Payment | 630 | $288.93 | $182,026 |
| Mar 13, 2026 | Weber Brian P | EVP (CHESI) | D Disposition | 1,869 | Not measured | Not measured |
| Mar 13, 2026 | Harrison Robert W. | EVP, EHS | D Disposition | 368 | Not measured | Not measured |
| Mar 13, 2026 | Geer Charles H. II | EVP, Industrial Services | D Disposition | 139 | Not measured | Not measured |
| Mar 13, 2026 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | F Tax Payment | 125 | $288.93 | $36,116 |
| Mar 13, 2026 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | D Disposition | 1,324 | Not measured | Not measured |
| Mar 13, 2026 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | D Disposition | 1,401 | Not measured | Not measured |
| Mar 13, 2026 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | F Tax Payment | 350 | $288.93 | $101,126 |
| Mar 13, 2026 | Gabriel Sharon M. | EVP/CIO (CHESI) | F Tax Payment | 727 | $288.93 | $210,052 |
| Mar 13, 2026 | Gabriel Sharon M. | EVP/CIO (CHESI) | D Disposition | 1,401 | Not measured | Not measured |
| Mar 13, 2026 | Battles Michael Louis | CO-CEO | D Disposition | 2,166 | Not measured | Not measured |
| Mar 13, 2026 | GERSTENBERG ERIC W | CO-CEO | F Tax Payment | 977 | $288.93 | $282,285 |
| Mar 13, 2026 | Battles Michael Louis | CO-CEO | F Tax Payment | 1,148 | $288.93 | $331,692 |
| Mar 13, 2026 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | D Disposition | 1,028 | Not measured | Not measured |
| Mar 13, 2026 | Weber Brian P | EVP (CHESI) | F Tax Payment | 960 | $288.93 | $277,373 |
| Mar 13, 2026 | MCKIM ALAN S | EXEC CHAIR, CTO. | F Tax Payment | 1,265 | $288.93 | $365,496 |
| Mar 13, 2026 | GERSTENBERG ERIC W | CO-CEO | D Disposition | 2,166 | Not measured | Not measured |
The full Form 4 history is on the CLH company page (Insider Trades card, View all).
Questions about this data
Which insider transactions are open-market trades?
Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.
How quickly are insider trades reported?
A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.
Who has to file Form 4?
Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.
Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.