CLH Insider Trading
SEC Form 4 transaction history for CLH. Filings have up to a 2 business day reporting delay.
Insiders at CLH reported 2 open-market sells worth $474K in the last 90 days, with no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification, and estate reasons all the time. Latest filing: Robertson Andrea on 2026-08-03.
Buys (90d)
0
Buy value (90d)
$0
Sells (90d)
2
Sell value (90d)
$474K
Transaction History
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-08-03 | Robertson Andrea | - | Sell | 789 | $314.01 | $248K |
| 2026-07-17 | MCKIM ALAN S | EXEC CHAIR, CTO. | Tax withholding | 1.3K | $310.58 | $393K |
| 2026-06-01 | Diderich Jeroen | EVP&President of Sales&Service | Tax withholding | 1.7K | $281.00 | $482K |
| 2026-05-26 | States Lauren | - | Sell | 789 | $286.19 | $226K |
| 2026-05-20 | Welch John R. | - | Grant | 652 | $0.00 | $0 |
| 2026-05-20 | States Lauren | - | Grant | 652 | $0.00 | $0 |
| 2026-05-20 | Reed Marcy L. | - | Grant | 652 | $0.00 | $0 |
| 2026-05-20 | Polito Karyn | - | Grant | 652 | $0.00 | $0 |
| 2026-05-20 | Robertson Andrea | - | Grant | 652 | $0.00 | $0 |
| 2026-05-20 | Willett Robert | - | Grant | 652 | $0.00 | $0 |
| 2026-05-20 | Stewart Shelley JR | - | Grant | 652 | $0.00 | $0 |
| 2026-05-20 | Quirk Alison A. | - | Grant | 652 | $0.00 | $0 |
| 2026-05-20 | PRESTON JOHN T | - | Grant | 652 | $0.00 | $0 |
| 2026-05-20 | GALANTE EDWARD G | - | Grant | 652 | $0.00 | $0 |
| 2026-05-11 | Robertson Andrea | - | Gift | 342 | $0.00 | $0 |
| 2026-05-11 | Polito Karyn | - | Grant | 460 | $295.13 | $136K |
| 2026-03-18 | GERSTENBERG ERIC W | CO-CEO | Sell | 1.0K | $293.00 | $293K |
| 2026-03-18 | Reed Marcy L. | - | Sell | 836 | $287.94 | $241K |
| 2026-03-17 | Weber Brian P | EVP (CHESI) | Sell | 4.7K | $293.39 | $1.4M |
| 2026-03-13 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Disposition | 1.4K | $0.00 | $0 |
| 2026-03-13 | Battles Michael Louis | CO-CEO | Tax withholding | 1.1K | $288.93 | $332K |
| 2026-03-13 | Battles Michael Louis | CO-CEO | Disposition | 2.2K | $0.00 | $0 |
| 2026-03-13 | MCKIM ALAN S | EXEC CHAIR, CTO. | Tax withholding | 1.3K | $288.93 | $365K |
| 2026-03-13 | GERSTENBERG ERIC W | CO-CEO | Tax withholding | 977 | $288.93 | $282K |
| 2026-03-13 | GERSTENBERG ERIC W | CO-CEO | Disposition | 2.2K | $0.00 | $0 |
| 2026-03-13 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Tax withholding | 350 | $288.93 | $101K |
| 2026-03-13 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Disposition | 1.0K | $0.00 | $0 |
| 2026-03-13 | Weber Brian P | EVP (CHESI) | Tax withholding | 960 | $288.93 | $277K |
| 2026-03-13 | Weber Brian P | EVP (CHESI) | Disposition | 1.9K | $0.00 | $0 |
| 2026-03-13 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Tax withholding | 630 | $288.93 | $182K |
| 2026-03-13 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Disposition | 1.3K | $0.00 | $0 |
| 2026-03-13 | Gabriel Sharon M. | EVP/CIO (CHESI) | Tax withholding | 727 | $288.93 | $210K |
| 2026-03-13 | Gabriel Sharon M. | EVP/CIO (CHESI) | Disposition | 1.4K | $0.00 | $0 |
| 2026-03-13 | Harrison Robert W. | EVP, EHS | Tax withholding | 18 | $288.93 | $5K |
| 2026-03-13 | Harrison Robert W. | EVP, EHS | Disposition | 368 | $0.00 | $0 |
| 2026-03-13 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Tax withholding | 125 | $288.93 | $36K |
| 2026-03-13 | Geer Charles H. II | EVP, Industrial Services | Disposition | 139 | $0.00 | $0 |
| 2026-03-04 | MCKIM ALAN S | EXEC CHAIR, CTO. | Sell | 100.0K | $292.65 | $29.3M |
| 2026-02-23 | GERSTENBERG ERIC W | CO-CEO | Sell | 2.5K | $279.86 | $700K |
| 2026-02-20 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Sell | 2.8K | $281.31 | $784K |
| 2026-02-20 | Gabriel Sharon M. | EVP/CIO (CHESI) | Sell | 3.5K | $282.07 | $999K |
| 2026-02-19 | MCKIM ALAN S | EXEC CHAIR, CTO. | Gift | 10.0K | $0.00 | $0 |
| 2026-02-19 | Welch John R. | - | Sell | 750 | $273.07 | $205K |
| 2026-02-19 | MCKIM ALAN S | EXEC CHAIR, CTO. | Sell | 100.0K | $281.14 | $28.1M |
| 2026-02-02 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Tax withholding | 249 | $259.91 | $65K |
| 2026-02-02 | Battles Michael Louis | CO-CEO | Tax withholding | 5.2K | $259.91 | $1.4M |
| 2026-02-02 | GERSTENBERG ERIC W | CO-CEO | Tax withholding | 4.9K | $259.91 | $1.3M |
| 2026-02-02 | Weber Brian P | EVP (CHESI) | Tax withholding | 1.4K | $259.91 | $362K |
| 2026-02-02 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Tax withholding | 567 | $259.91 | $147K |
| 2026-02-02 | Gabriel Sharon M. | EVP/CIO (CHESI) | Tax withholding | 508 | $259.91 | $132K |
| 2026-02-02 | Harrison Robert W. | EVP, EHS | Tax withholding | 184 | $259.91 | $48K |
| 2026-02-02 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Tax withholding | 425 | $259.91 | $110K |
| 2026-02-02 | Diderich Jeroen | EVP&President of Sales&Service | Tax withholding | 105 | $259.91 | $27K |
| 2026-02-02 | Geer Charles H. II | EVP, Industrial Services | Tax withholding | 197 | $259.91 | $51K |
| 2026-02-01 | Battles Michael Louis | CO-CEO | Grant | 10.7K | $0.00 | $0 |
| 2026-02-01 | Gabriel Sharon M. | EVP/CIO (CHESI) | Grant | 2.1K | $0.00 | $0 |
| 2026-02-01 | Gabriel Sharon M. | EVP/CIO (CHESI) | Grant | 566 | $0.00 | $0 |
| 2026-02-01 | Harrison Robert W. | EVP, EHS | Grant | 1.0K | $0.00 | $0 |
| 2026-02-01 | Harrison Robert W. | EVP, EHS | Grant | 430 | $0.00 | $0 |
| 2026-02-01 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Grant | 2.5K | $0.00 | $0 |
| 2026-02-01 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Grant | 838 | $0.00 | $0 |
| 2026-02-01 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Grant | 1.0K | $0.00 | $0 |
| 2026-02-01 | Diderich Jeroen | EVP&President of Sales&Service | Grant | 3.1K | $0.00 | $0 |
| 2026-02-01 | Diderich Jeroen | EVP&President of Sales&Service | Grant | 1.0K | $0.00 | $0 |
| 2026-02-01 | Battles Michael Louis | CO-CEO | Grant | 10.3K | $0.00 | $0 |
| 2026-02-01 | Geer Charles H. II | EVP, Industrial Services | Grant | 1.8K | $0.00 | $0 |
| 2026-02-01 | Geer Charles H. II | EVP, Industrial Services | Grant | 503 | $0.00 | $0 |
| 2026-02-01 | GERSTENBERG ERIC W | CO-CEO | Grant | 10.7K | $0.00 | $0 |
| 2026-02-01 | GERSTENBERG ERIC W | CO-CEO | Grant | 10.3K | $0.00 | $0 |
| 2026-02-01 | Weber Brian P | EVP (CHESI) | Grant | 3.2K | $0.00 | $0 |
| 2026-02-01 | Weber Brian P | EVP (CHESI) | Grant | 1.1K | $0.00 | $0 |
| 2026-02-01 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Grant | 3.1K | $0.00 | $0 |
| 2026-01-02 | Gabriel Sharon M. | EVP/CIO (CHESI) | Tax withholding | 525 | $234.48 | $123K |
| 2025-12-17 | Welch John R. | - | Gift | 415 | $0.00 | $0 |
| 2025-12-16 | GERSTENBERG ERIC W | CO-CEO | Sell | 601 | $240.90 | $145K |
| 2025-12-15 | Geer Charles H. II | EVP, Industrial Services | Tax withholding | 28 | $240.71 | $7K |
| 2025-12-15 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Tax withholding | 51 | $240.71 | $12K |
| 2025-12-15 | Harrison Robert W. | EVP, EHS | Tax withholding | 16 | $240.71 | $4K |
| 2025-12-09 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Gift | 1.0K | $0.00 | $0 |
| 2025-12-01 | Harrison Robert W. | EVP, EHS | Tax withholding | 122 | $228.54 | $28K |
| 2025-11-13 | States Lauren | - | Gift | 245 | $0.00 | $0 |
| 2025-11-01 | Geer Charles H. II | EVP, Industrial Services | Tax withholding | 294 | $210.51 | $62K |
| 2025-09-16 | MCKIM ALAN S | EXEC CHAIR, CTO. | Gift | 8.6K | $0.00 | $0 |
| 2025-09-16 | MCKIM ALAN S | EXEC CHAIR, CTO. | Gift | 4.3K | $0.00 | $0 |
| 2025-08-05 | Robertson Andrea | - | Gift | 430 | $0.00 | $0 |
| 2025-08-01 | Battles Michael Louis | CO-CEO | Buy | 2.0K | $233.50 | $467K |
| 2025-07-31 | Robertson Andrea | - | Sell | 836 | $233.64 | $195K |
| 2025-07-01 | Gabriel Sharon M. | EVP/CIO (CHESI) | Tax withholding | 525 | $229.55 | $121K |
| 2025-07-01 | CURTIS GEORGE L | EXEC. VICE PRESIDENT (CHESI) | Tax withholding | 399 | $229.55 | $92K |
| 2025-07-01 | GERSTENBERG ERIC W | CO-CEO | Tax withholding | 564 | $229.55 | $129K |
| 2025-07-01 | Underwood Rebecca | PRESIDENT & EVP FACILITIES | Tax withholding | 1.1K | $229.55 | $241K |
| 2025-07-01 | Battles Michael Louis | CO-CEO | Tax withholding | 1.5K | $229.55 | $352K |
| 2025-07-01 | MCKIM ALAN S | EXEC CHAIR, CTO. | Tax withholding | 1.3K | $229.55 | $308K |
| 2025-07-01 | Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | Tax withholding | 613 | $229.55 | $141K |
| 2025-07-01 | Weber Brian P | EVP (CHESI) | Tax withholding | 1.1K | $229.55 | $261K |
| 2025-06-13 | Weber Brian P | EVP (CHESI) | Sell | 3.0K | $227.17 | $689K |
Form 4 filings have a reporting delay of up to 2 business days. Insiders sell for many non-signal reasons (diversification, tax planning). This is observation data, not a recommendation.
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Understanding
Interpreting CLH insider filings
Officers, directors, and 10% owners of CLH must report every trade in their own stock to the SEC within two business days on Form 4. We parse each filing as it lands on EDGAR, so this page is the same primary-source record professionals read, minus the paywall.
The asymmetry that makes this data useful: insiders sell for dozens of innocent reasons (taxes, diversification, a house), but they voluntarily buy on the open market for exactly one reason. That is why buys are headlined and one-off sells deserve little weight.
The strongest historical pattern is the cluster: several different insiders buying within days of each other. A lone director's small buy is noise; the CFO and two directors buying the same week is a documented anomaly worth your attention.
Frequently Asked Questions
Who files Form 4 for CLH?
Officers, directors, and 10%+ owners of CLH must report their trades to the SEC within 2 business days.
What do the transaction types mean?
Buy (P) and Sell (S) are open-market trades, the strongest signals. Grants, option exercises, and gifts are routine compensation events.
How fresh is this data?
We poll SEC EDGAR every 30 minutes. New filings appear here shortly after the SEC publishes them.
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.