CLH SEC filings (2026)
CIK 822818 · Hazardous Waste Management (SIC 4955) · incorporated in MA · fiscal year ends in December
2,664 filings on EDGAR since 1994 · 34 annual, 102 quarterly, 237 current · financial statements · earnings
What happened, last 12 months#
Every earnings release with its print, every report with its quarter, the other 8-Ks by what they covered, the proxy statements, and each day an insider bought or sold — newest first, each line opening the filing on EDGAR. The index by form and year follows.
September 2026
- Sep 188-K8-K · Other events
August 2026
- Aug 14Insider saleGERSTENBERG ERIC W (CO-CEO) sold 2,500 shares for $803K at $321.34
- Aug 128-K8-K · Other events
- Aug 3Insider saleRobertson Andrea (Director) sold 789 shares for $248K at $314.01
July 2026
- Jul 29EarningsEarnings release — EPS $3.22 vs $2.74 est. (+17.5%) 7.5%
- Jul 29ReportQuarterly report
May 2026
- May 26Insider saleStates Lauren (Director) sold 789 shares for $226K at $286.19
- May 208-K8-K · Shareholder vote results
- May 208-K8-K · Directors or officers; compensation; Regulation FD disclosure
- May 148-K8-K · Other events
- May 11Insider buyPolito Karyn (Director) bought 460 shares for $136K at $295.13
- May 6EarningsEarnings release — EPS $1.19 vs $1.15 est. (+3.5%); revenue $1.46B (+2% y/y) 8.2%
- May 6ReportQuarterly report, Q1 2026 — revenue $1.46B (+2% y/y), net income $63.2M, EPS $1.19
April 2026
- Apr 10ProxyProxy · Annual report to shareholders
- Apr 10ProxyProxy · Additional proxy materials
- Apr 10ProxyProxy · Proxy statement
March 2026
- Mar 18Insider saleGERSTENBERG ERIC W (CO-CEO) sold 2,000 shares for $586K at $293.00
- Mar 18Insider saleReed Marcy L. (Director) sold 836 shares for $241K at $287.94
- Mar 17Insider saleWeber Brian P (EVP (CHESI)) sold 4,683 shares for $1.4M at $293.39
- Mar 4Insider saleMCKIM ALAN S (EXEC CHAIR, CTO. · Director) sold 100,000 shares for $29.3M at $292.65
February 2026
- Feb 23Insider saleGERSTENBERG ERIC W (CO-CEO) sold 5,000 shares for $1.4M at $279.86
- Feb 20Insider saleDugas Eric J. (EVP CHIEF FINANCIAL OFFICER) sold 5,576 shares for $1.6M at $281.31
- Feb 20Insider saleGabriel Sharon M. (EVP/CIO (CHESI)) sold 3,540 shares for $999K at $282.07
- Feb 19Insider saleMCKIM ALAN S (EXEC CHAIR, CTO. · Director) sold 100,000 shares for $28.1M at $281.14
- Feb 19Insider saleWelch John R. (Director) sold 750 shares for $205K at $273.07
- Feb 18EarningsEarnings release — EPS $1.62 vs $1.59 est. (+1.9%); revenue $1.50B (+5% y/y) 2.7%
- Feb 18ReportAnnual report, FY2025 — revenue $6.03B (+2% y/y), net income $391.0M, EPS $7.28
October 2025
Insider transactions#
What officers, directors and 10% holders reported on Forms 4 and 5 over the last 13 months, from the documents themselves: one insider’s trades of one kind on one day are one row, with the shares, the price range and the total as filed. Open-market buys and sells first; awards, exercises, tax withholding, gifts and employee-plan purchases are grouped below them.
Over the last 13 months insiders sold $65.0M in 12 sales and bought $136K in 1 purchase; 62 other transactions (awards, exercises, tax withholding, gifts and plan purchases).
| Date | Insider |
|---|---|
| Aug 14, 2026Form 4 | GERSTENBERG ERIC WCO-CEOSold · $803K · 2,500 sh |
| Aug 3, 2026Form 4 | Robertson AndreaDirectorSold · $248K · 789 sh |
| May 26, 2026Form 4 | States LaurenDirectorSold · $226K · 789 sh |
| May 11, 2026Form 4 | Polito KarynDirectorBought · $136K · 460 sh |
| Mar 18, 2026Form 4 ×2 | GERSTENBERG ERIC WCO-CEOSold · $586K · 2,000 sh |
| Mar 18, 2026Form 4 | Reed Marcy L.DirectorSold · $241K · 836 sh |
| Mar 17, 2026Form 4 | Weber Brian PEVP (CHESI)Sold · $1.4M · 4,683 sh |
| Mar 4, 2026Form 4 | MCKIM ALAN SEXEC CHAIR, CTO. · DirectorSold · $29.3M · 100,000 sh |
| Feb 23, 2026Form 4 ×2 | GERSTENBERG ERIC WCO-CEOSold · $1.4M · 5,000 sh |
| Feb 20, 2026Form 4 ×2 | Dugas Eric J.EVP CHIEF FINANCIAL OFFICERSold · $1.6M · 5,576 sh |
| Feb 20, 2026Form 4 | Gabriel Sharon M.EVP/CIO (CHESI)Sold · $999K · 3,540 sh |
| Feb 19, 2026Form 4 | MCKIM ALAN SEXEC CHAIR, CTO. · DirectorSold · $28.1M · 100,000 sh |
| Feb 19, 2026Form 4 | Welch John R.DirectorSold · $205K · 750 sh |
Awards, exercises, withholding and plan purchases · 62 transactions
| Date | Insider |
|---|---|
| Jul 17, 2026Form 4 | MCKIM ALAN SEXEC CHAIR, CTO. · DirectorTax withholding · $393K · 1,265 sh |
| Jul 1, 2026Form 4 | CURTIS GEORGE LEXEC. VICE PRESIDENT (CHESI)Tax withholding · $511K · 1,757 sh |
| Jul 1, 2026Form 4 | MCKIM ALAN SEXEC CHAIR, CTO. · DirectorTax withholding · $390K · 1,343 sh |
| Jul 1, 2026Form 4 ×2 | GERSTENBERG ERIC WCO-CEOTax withholding · $328K · 1,128 sh |
| Jul 1, 2026Form 4 | Battles Michael LouisCO-CEO · DirectorTax withholding · $300K · 1,032 sh |
| Jul 1, 2026Form 4 ×2 | Dugas Eric J.EVP CHIEF FINANCIAL OFFICERTax withholding · $260K · 894 sh |
| Jul 1, 2026Form 4 | Weber Brian PEVP (CHESI)Tax withholding · $237K · 814 sh |
| Jul 1, 2026Form 4 | Gabriel Sharon M.EVP/CIO (CHESI)Tax withholding · $104K · 359 sh |
| Jul 1, 2026Form 4 | Underwood RebeccaPRESIDENT & EVP FACILITIESTax withholding · $90K · 311 sh |
| Jul 1, 2026Form 4 | Geer Charles H. IIEVP, Industrial ServicesTax withholding · $12K · 40 sh |
| Jun 1, 2026Form 4 | Diderich JeroenEVP&President of Sales&ServiceTax withholding · $482K · 1,717 sh |
| May 20, 2026Form 4 | PRESTON JOHN TDirectorAward · $0 · 652 sh |
| May 20, 2026Form 4 | GALANTE EDWARD GDirectorAward · $0 · 652 sh |
| May 20, 2026Form 4 | Robertson AndreaDirectorAward · $0 · 652 sh |
| May 20, 2026Form 4 | Willett RobertDirectorAward · $0 · 652 sh |
| May 20, 2026Form 4 | Stewart Shelley JRDirectorAward · $0 · 652 sh |
| May 20, 2026Form 4 | Quirk Alison A.DirectorAward · $0 · 652 sh |
| May 20, 2026Form 4 | Welch John R.DirectorAward · $0 · 652 sh |
| May 20, 2026Form 4 | States LaurenDirectorAward · $0 · 652 sh |
| May 20, 2026Form 4 | Reed Marcy L.DirectorAward · $0 · 652 sh |
| May 20, 2026Form 4 | Polito KarynDirectorAward · $0 · 652 sh |
| May 11, 2026Form 4 | Polito KarynDirectorAward · $136K · 460 sh |
| May 11, 2026Form 4 | Robertson AndreaDirectorGift · $0 · 342 sh |
| Mar 13, 2026Form 4 ×2 | GERSTENBERG ERIC WCO-CEOTax withholding · $565K · 1,954 sh |
| Mar 13, 2026Form 4 | MCKIM ALAN SEXEC CHAIR, CTO. · DirectorTax withholding · $365K · 1,265 sh |
| Mar 13, 2026Form 4 ×2 | Dugas Eric J.EVP CHIEF FINANCIAL OFFICERTax withholding · $364K · 1,260 sh |
| Mar 13, 2026Form 4 | Battles Michael LouisCO-CEO · DirectorTax withholding · $332K · 1,148 sh |
| Mar 13, 2026Form 4 | Weber Brian PEVP (CHESI)Tax withholding · $277K · 960 sh |
| Mar 13, 2026Form 4 | Gabriel Sharon M.EVP/CIO (CHESI)Tax withholding · $210K · 727 sh |
| Mar 13, 2026Form 4 | CURTIS GEORGE LEXEC. VICE PRESIDENT (CHESI)Tax withholding · $101K · 350 sh |
| Mar 13, 2026Form 4 | Underwood RebeccaPRESIDENT & EVP FACILITIESTax withholding · $36K · 125 sh |
| Mar 13, 2026Form 4 | Harrison Robert W.EVP, EHSTax withholding · $5,201 · 18 sh |
| Mar 13, 2026Form 4 ×2 | GERSTENBERG ERIC WCO-CEOOther · $0 · 4,332 sh |
| Mar 13, 2026Form 4 ×2 | Dugas Eric J.EVP CHIEF FINANCIAL OFFICEROther · $0 · 2,648 sh |
| Mar 13, 2026Form 4 | Battles Michael LouisCO-CEO · DirectorOther · $0 · 2,166 sh |
| Mar 13, 2026Form 4 | Weber Brian PEVP (CHESI)Other · $0 · 1,869 sh |
| Mar 13, 2026Form 4 | Gabriel Sharon M.EVP/CIO (CHESI)Other · $0 · 1,401 sh |
| Mar 13, 2026Form 4 | Underwood RebeccaPRESIDENT & EVP FACILITIESOther · $0 · 1,401 sh |
| Mar 13, 2026Form 4 | CURTIS GEORGE LEXEC. VICE PRESIDENT (CHESI)Other · $0 · 1,028 sh |
| Mar 13, 2026Form 4 | Harrison Robert W.EVP, EHSOther · $0 · 368 sh |
| Mar 13, 2026Form 4 | Geer Charles H. IIEVP, Industrial ServicesOther · $0 · 139 sh |
| Feb 19, 2026Form 4 | MCKIM ALAN SEXEC CHAIR, CTO. · DirectorGift · $0 · 10,000 sh |
| Feb 2, 2026Form 4 | Battles Michael LouisCO-CEO · DirectorTax withholding · $1.4M · 5,205 sh |
| Feb 2, 2026Form 4 | GERSTENBERG ERIC WCO-CEOTax withholding · $1.3M · 4,934 sh |
| Feb 2, 2026Form 4 | Weber Brian PEVP (CHESI)Tax withholding · $362K · 1,394 sh |
| Feb 2, 2026Form 4 | Dugas Eric J.EVP CHIEF FINANCIAL OFFICERTax withholding · $147K · 567 sh |
| Feb 2, 2026Form 4 | Gabriel Sharon M.EVP/CIO (CHESI)Tax withholding · $132K · 508 sh |
| Feb 2, 2026Form 4 | Underwood RebeccaPRESIDENT & EVP FACILITIESTax withholding · $110K · 425 sh |
| Feb 2, 2026Form 4 | CURTIS GEORGE LEXEC. VICE PRESIDENT (CHESI)Tax withholding · $65K · 249 sh |
| Feb 2, 2026Form 4 | Geer Charles H. IIEVP, Industrial ServicesTax withholding · $51K · 197 sh |
| Feb 2, 2026Form 4 | Harrison Robert W.EVP, EHSTax withholding · $48K · 184 sh |
| Feb 2, 2026Form 4 | Diderich JeroenEVP&President of Sales&ServiceTax withholding · $27K · 105 sh |
| Feb 1, 2026Form 4 | GERSTENBERG ERIC WCO-CEOAward · $0 · 20,980 sh |
| Feb 1, 2026Form 4 | Battles Michael LouisCO-CEO · DirectorAward · $0 · 20,980 sh |
| Feb 1, 2026Form 4 | Weber Brian PEVP (CHESI)Award · $0 · 4,222 sh |
| Feb 1, 2026Form 4 | Diderich JeroenEVP&President of Sales&ServiceAward · $0 · 4,188 sh |
| Feb 1, 2026Form 4 | Dugas Eric J.EVP CHIEF FINANCIAL OFFICERAward · $0 · 4,088 sh |
| Feb 1, 2026Form 4 | Underwood RebeccaPRESIDENT & EVP FACILITIESAward · $0 · 3,351 sh |
| Feb 1, 2026Form 4 | Gabriel Sharon M.EVP/CIO (CHESI)Award · $0 · 2,639 sh |
| Feb 1, 2026Form 4 | Geer Charles H. IIEVP, Industrial ServicesAward · $0 · 2,346 sh |
| Feb 1, 2026Form 4 | Harrison Robert W.EVP, EHSAward · $0 · 1,433 sh |
| Jan 2, 2026Form 4 | Gabriel Sharon M.EVP/CIO (CHESI)Tax withholding · $123K · 525 sh |
Reports and proxy statements#
Annual reports (10-K, 20-F, 40-F), quarterly reports (10-Q), current reports (8-K, 6-K) and proxy statements, newest first. An 8-K is described by its items. A form opens the document on EDGAR, or the filing’s index where it furnishes exhibits (an earnings release is the 8-K’s Exhibit 99.1).
2026 · 14 filings
| Filed | What it is |
|---|---|
| Sep 18, 20268-K | Other events |
| Aug 12, 20268-K | Other events |
| Jul 29, 202610-Q | Quarterly report |
| Jul 29, 20268-K | Earnings release — EPS $3.22 vs $2.74 est. (+17.5%) 7.5% |
| May 20, 20268-K | Shareholder vote results |
| May 20, 20268-K | Directors or officers; compensation; Regulation FD disclosure |
| May 14, 20268-K | Other events |
| May 6, 202610-Q | Quarterly report, Q1 2026 — revenue $1.46B (+2% y/y), net income $63.2M, EPS $1.19 |
| May 6, 20268-K | Earnings release — EPS $1.19 vs $1.15 est. (+3.5%); revenue $1.46B (+2% y/y) 8.2% |
| Apr 10, 2026ARS | Annual report to shareholders |
| Apr 10, 2026DEFA14A | Additional proxy materials |
| Apr 10, 2026DEF 14A | Proxy statement |
| Feb 18, 202610-K | Annual report, FY2025 — revenue $6.03B (+2% y/y), net income $391.0M, EPS $7.28 |
| Feb 18, 20268-K | Earnings release — EPS $1.62 vs $1.59 est. (+1.9%); revenue $1.50B (+5% y/y) 2.7% |
2025 · 14 filings
| Filed | What it is |
|---|---|
| Oct 29, 202510-Q | Quarterly report, Q3 2025 — revenue $1.55B (+1% y/y), net income $118.8M, EPS $2.21 |
| Oct 29, 20258-K | Earnings release — EPS $2.21 vs $2.37 est. (−6.8%); revenue $1.55B (+1% y/y) 11.5% |
| Oct 10, 20258-K | Material definitive agreement; New financial obligation |
| Sep 26, 20258-K | Other events |
| Jul 30, 202510-Q | Quarterly report, Q2 2025 — revenue $1.55B (−0% y/y), net income $126.9M, EPS $2.36 |
| Jul 30, 20258-K | Results of operations |
| May 21, 20258-K | Shareholder vote results |
| Apr 30, 202510-Q | Quarterly report, Q1 2025 — revenue $1.43B (+4% y/y), net income $58.7M, EPS $1.09 |
| Apr 30, 20258-K | Results of operations |
| Apr 16, 2025ARS | Annual report to shareholders |
| Apr 11, 2025DEFA14A | Additional proxy materials |
| Apr 11, 2025DEF 14A | Proxy statement |
| Feb 19, 202510-K | Annual report, FY2024 — revenue $5.89B (+9% y/y), net income $402.3M, EPS $7.42 |
| Feb 19, 20258-K | Results of operations |
2024 · 17 filings
| Filed | What it is |
|---|---|
| Oct 30, 202410-Q | Quarterly report, Q3 2024 — revenue $1.53B (+12% y/y), net income $115.2M, EPS $2.12 |
| Oct 30, 20248-K | Results of operations |
| Oct 11, 20248-K | Material definitive agreement; New financial obligation |
| Sep 3, 20248-K | Directors or officers; compensation; Regulation FD disclosure |
| Jul 31, 202410-Q | Quarterly report, Q2 2024 — revenue $1.55B (+11% y/y), net income $133.3M, EPS $2.46 |
| Jul 31, 20248-K | Results of operations |
| Jul 2, 20248-K | Material definitive agreement; New financial obligation |
| May 23, 20248-K | Directors or officers; compensation; Shareholder vote results |
| May 1, 202410-Q | Quarterly report, Q1 2024 — revenue $1.38B (+5% y/y), net income $69.8M, EPS $1.29 |
| May 1, 20248-K | Results of operations |
| Apr 15, 2024ARS | Annual report to shareholders |
| Apr 10, 2024DEFA14A | Additional proxy materials |
| Apr 10, 2024DEF 14A | Proxy statement |
| Mar 25, 20248-K | Material definitive agreement; New financial obligation; Other events |
| Feb 21, 202410-K | Annual report, FY2023 — revenue $5.41B (+5% y/y), net income $377.9M, EPS $6.95 |
| Feb 21, 20248-K | Results of operations |
| Feb 6, 20248-K | Other events |
2023 · 20 filings — 13 × 8-K, 3 × 10-Q, 1 × 10-K and 3 other forms
| Filed | What it is |
|---|---|
| Nov 1, 202310-Q | Quarterly report, Q3 2023 — revenue $1.37B (+0% y/y), net income $91.3M, EPS $1.68 |
| Aug 2, 202310-Q | Quarterly report, Q2 2023 — revenue $1.40B (+3% y/y), net income $115.8M, EPS $2.13 |
| May 3, 202310-Q | Quarterly report, Q1 2023 — revenue $1.31B (+12% y/y), net income $72.4M, EPS $1.33 |
| Apr 13, 2023ARS | Annual report to shareholders |
| Apr 13, 2023DEFA14A | Additional proxy materials |
| Apr 13, 2023DEF 14A | Proxy statement |
| Mar 1, 202310-K | Annual report, FY2022 — revenue $5.17B (+36% y/y), net income $411.7M, EPS $7.56 |
13 current reports (8-K) not listed; the year is on EDGAR.
2022 · 14 filings — 8 × 8-K, 3 × 10-Q, 1 × 10-K and 2 other forms
| Filed | What it is |
|---|---|
| Nov 2, 202210-Q | Quarterly report, Q3 2022 — revenue $1.36B (+43% y/y), net income $135.8M, EPS $2.50 |
| Aug 3, 202210-Q | Quarterly report, Q2 2022 — revenue $1.36B (+46% y/y), net income $148.2M, EPS $2.71 |
| May 4, 202210-Q | Quarterly report, Q1 2022 — revenue $1.17B (+45% y/y), net income $45.3M, EPS $0.83 |
| Apr 14, 2022DEFA14A | Additional proxy materials |
| Apr 14, 2022DEF 14A | Proxy statement |
| Feb 23, 202210-K | Annual report, FY2021 — revenue $3.81B (+21% y/y), net income $203.2M, EPS $3.71 |
8 current reports (8-K) not listed; the year is on EDGAR.
2021 · 17 filings — 10 × 8-K, 3 × 10-Q, 1 × 10-K and 3 other forms
| Filed | What it is |
|---|---|
| Nov 3, 202110-Q | Quarterly report, Q3 2021 — revenue $951.5M (+22% y/y), net income $65.4M, EPS $1.20 |
| Aug 4, 202110-Q | Quarterly report, Q2 2021 — revenue $926.5M (+30% y/y), net income $67.1M, EPS $1.22 |
| May 5, 202110-Q | Quarterly report, Q1 2021 — revenue $808.1M (−6% y/y), net income $21.7M, EPS $0.39 |
| Apr 28, 2021DEFA14A | Additional proxy materials |
| Apr 23, 2021DEF 14A | Proxy statement |
| Apr 13, 2021PRE 14A | Preliminary proxy statement |
| Feb 24, 202110-K | Annual report, FY2020 — revenue $3.14B (−8% y/y), net income $134.8M, EPS $2.42 |
10 current reports (8-K) not listed; the year is on EDGAR.
2020 · 12 filings — 6 × 8-K, 3 × 10-Q, 1 × 10-K and 2 other forms
| Filed | What it is |
|---|---|
| Nov 4, 202010-Q | Quarterly report, Q3 2020 — revenue $779.3M (−13% y/y), net income $54.9M, EPS $0.99 |
| Aug 5, 202010-Q | Quarterly report, Q2 2020 — revenue $710.0M (−18% y/y), net income $29.0M, EPS $0.52 |
| Apr 29, 202010-Q | Quarterly report, Q1 2020 — revenue $858.6M (+10% y/y), net income $11.6M, EPS $0.21 |
| Apr 24, 2020DEFA14A | Additional proxy materials |
| Apr 24, 2020DEF 14A | Proxy statement |
| Feb 26, 202010-K | Annual report, FY2019 — revenue $3.41B (+3% y/y), net income $97.7M, EPS $1.74 |
6 current reports (8-K) not listed; the year is on EDGAR.
2019 · 17 filings — 11 × 8-K, 3 × 10-Q, 1 × 10-K and 2 other forms
| Filed | What it is |
|---|---|
| Oct 30, 201910-Q | Quarterly report, Q3 2019 — revenue $891.7M (+6% y/y), net income $36.4M, EPS $0.65 |
| Jul 31, 201910-Q | Quarterly report, Q2 2019 — revenue $868.7M (+2% y/y), net income $36.2M, EPS $0.65 |
| May 1, 201910-Q | Quarterly report, Q1 2019 — revenue $780.8M (+4% y/y), net income $976K, EPS $0.02 |
| Apr 24, 2019DEFA14A | Additional proxy materials |
| Apr 24, 2019DEF 14A | Proxy statement |
| Feb 27, 201910-K | Annual report, FY2018 — revenue $3.30B (+12% y/y), net income $65.6M, EPS $1.16 |
11 current reports (8-K) not listed; the year is on EDGAR.
2018 · 19 filings — 11 × 8-K, 3 × 10-Q, 2 × 8-K/A and 3 other forms
| Filed | What it is |
|---|---|
| Oct 31, 201810-Q | Quarterly report, Q3 2018 — revenue $843.2M (+12% y/y), net income $31.1M, EPS $0.55 |
| Aug 1, 201810-Q | Quarterly report, Q2 2018 — revenue $849.1M (+13% y/y), net income $30.7M, EPS $0.54 |
| May 2, 201810-Q | Quarterly report, Q1 2018 — revenue $749.8M (+9% y/y), net income −$12.6M, EPS −$0.22 |
| Apr 25, 2018DEFA14A | Additional proxy materials |
| Apr 25, 2018DEF 14A | Proxy statement |
| Feb 28, 201810-K | Annual report, FY2017 — revenue $2.94B (+7% y/y), net income $100.7M, EPS $1.76 |
13 current reports (8-K) not listed; the year is on EDGAR.
2017 · 15 filings — 9 × 8-K, 3 × 10-Q, 1 × 10-K and 2 other forms
| Filed | What it is |
|---|---|
| Nov 1, 201710-Q | Quarterly report, Q3 2017 — revenue $755.8M (+4% y/y), net income $12.1M, EPS $0.21 |
| Aug 2, 201710-Q | Quarterly report, Q2 2017 — revenue $752.8M (+8% y/y), net income $25.9M, EPS $0.45 |
| May 3, 201710-Q | Quarterly report, Q1 2017 — revenue $688.9M (+8% y/y), net income −$21.4M, EPS −$0.37 |
| Apr 26, 2017DEFA14A | Additional proxy materials |
| Apr 26, 2017DEF 14A | Proxy statement |
| Feb 22, 201710-K | Annual report, FY2016 — revenue $2.76B (−16% y/y), net income −$39.9M, EPS −$0.69 |
9 current reports (8-K) not listed; the year is on EDGAR.
2016 · 16 filings — 10 × 8-K, 3 × 10-Q, 1 × 10-K and 2 other forms
Counted, not listed; the year is on EDGAR.
2015 · 15 filings — 8 × 8-K, 3 × 10-Q, 1 × 10-K and 3 other forms
Counted, not listed; the year is on EDGAR.
2014 · 16 filings — 9 × 8-K, 3 × 10-Q, 1 × 10-K and 3 other forms
Counted, not listed; the year is on EDGAR.
2013 · 18 filings — 11 × 8-K, 3 × 10-Q, 1 × 10-K and 3 other forms
Counted, not listed; the year is on EDGAR.
2012 · 24 filings — 16 × 8-K, 3 × 10-Q, 1 × 10-K and 4 other forms
Counted, not listed; the year is on EDGAR.
2011 · 21 filings — 14 × 8-K, 3 × 10-Q, 1 × 10-K and 3 other forms
Counted, not listed; the year is on EDGAR.
2010 · 13 filings — 6 × 8-K, 3 × 10-Q, 1 × 10-K and 3 other forms
Counted, not listed; the year is on EDGAR.
2009 · 19 filings — 11 × 8-K, 3 × 10-Q, 2 × 8-K/A and 3 other forms
Counted, not listed; the year is on EDGAR.
2008 · 15 filings — 10 × 8-K, 3 × 10-Q, 1 × 10-K and 1 other form
Counted, not listed; the year is on EDGAR.
2007 · 11 filings — 6 × 8-K, 3 × 10-Q, 1 × 10-K and 1 other form
Counted, not listed; the year is on EDGAR.
2006 · 16 filings — 10 × 8-K, 3 × 10-Q, 1 × 10-K and 2 other forms
Counted, not listed; the year is on EDGAR.
2005 · 18 filings — 11 × 8-K, 3 × 10-Q, 1 × 10-K and 3 other forms
Counted, not listed; the year is on EDGAR.
2004 · 12 filings — 7 × 8-K, 3 × 10-Q, 1 × 10-K and 1 other form
Counted, not listed; the year is on EDGAR.
2003 · 14 filings — 5 × 8-K, 3 × 10-Q, 2 × 10-Q/A and 4 other forms
Counted, not listed; the year is on EDGAR.
2002 · 9 filings — 3 × 10-Q, 2 × 8-K, 1 × 10-K405 and 3 other forms
Counted, not listed; the year is on EDGAR.
2001 · 5 filings — 3 × 10-Q, 1 × 10-K405, 1 × DEF 14A
Counted, not listed; the year is on EDGAR.
2000 · 5 filings — 3 × 10-Q, 1 × 10-K, 1 × DEF 14A
Counted, not listed; the year is on EDGAR.
1999 · 6 filings — 3 × 10-Q, 1 × 10-K, 1 × DEF 14A and 1 other form
Counted, not listed; the year is on EDGAR.
1998 · 5 filings — 3 × 10-Q, 1 × 10-K, 1 × DEF 14A
Counted, not listed; the year is on EDGAR.
1997 · 5 filings — 3 × 10-Q, 1 × 10-K, 1 × DEF 14A
Counted, not listed; the year is on EDGAR.
1996 · 6 filings — 3 × 10-Q, 1 × 10-K, 1 × 10-K/A and 1 other form
Counted, not listed; the year is on EDGAR.
1995 · 7 filings — 3 × 10-Q, 2 × 10-Q/A, 1 × 10-K and 1 other form
Counted, not listed; the year is on EDGAR.
1994 · 4 filings — 3 × 10-Q, 1 × DEF 14A
Counted, not listed; the year is on EDGAR.
Insider, ownership and other filings#
Insider ownership (Forms 3, 4, 5 and 144), beneficial ownership (Schedules 13D and 13G), registration and prospectus (S-1, S-3, S-8, 424B and related) and the rest, counted by year, with the newest 25 of each of the latest 3 years shown. A Form 4 is one insider’s transaction report; a 13G is a passive holder above five percent.
2026 · 81 filings — 55 × 4, 12 × 144, 8 × 4/A and 2 other forms
| Filed | What it is |
|---|---|
| Aug 18, 20264 | Insider transaction (Form 4) |
| Aug 14, 2026144 | Notice of proposed sale (Form 144) |
| Aug 14, 20264/A | Insider transaction (Form 4), amended |
| Aug 14, 20264/A | Insider transaction (Form 4), amended |
| Aug 14, 20264/A | Insider transaction (Form 4), amended |
| Aug 14, 20264/A | Insider transaction (Form 4), amended |
| Aug 14, 20264/A | Insider transaction (Form 4), amended |
| Aug 14, 20264/A | Insider transaction (Form 4), amended |
| Aug 14, 20264/A | Insider transaction (Form 4), amended |
| Aug 12, 20264 | Insider transaction (Form 4) |
| Aug 11, 20264 | Insider transaction (Form 4) |
| Aug 6, 2026SCHEDULE 13G | Other filings |
| Aug 3, 2026144 | Notice of proposed sale (Form 144) |
| Aug 3, 20264 | Insider transaction (Form 4) |
| Jul 20, 20264 | Insider transaction (Form 4) |
| Jul 6, 20264 | Insider transaction (Form 4) |
| Jul 6, 20264 | Insider transaction (Form 4) |
| Jul 6, 20264 | Insider transaction (Form 4) |
| Jul 6, 20264 | Insider transaction (Form 4) |
| Jul 6, 20264 | Insider transaction (Form 4) |
| Jul 6, 20264 | Insider transaction (Form 4) |
| Jul 6, 20264 | Insider transaction (Form 4) |
| Jun 3, 20264 | Insider transaction (Form 4) |
| May 27, 20264 | Insider transaction (Form 4) |
| May 26, 2026144 | Notice of proposed sale (Form 144) |
The newest 25 of 81 shown; the full year is on EDGAR.
2025 · 97 filings — 69 × 4, 15 × 4/A, 10 × 144 and 2 other forms
| Filed | What it is |
|---|---|
| Dec 29, 20254 | Insider transaction (Form 4) |
| Dec 17, 20254 | Insider transaction (Form 4) |
| Dec 17, 20254 | Insider transaction (Form 4) |
| Dec 17, 20254 | Insider transaction (Form 4) |
| Dec 17, 20254 | Insider transaction (Form 4) |
| Dec 16, 2025144 | Notice of proposed sale (Form 144) |
| Dec 11, 20254 | Insider transaction (Form 4) |
| Dec 3, 20254 | Insider transaction (Form 4) |
| Nov 14, 20254 | Insider transaction (Form 4) |
| Nov 4, 20254 | Insider transaction (Form 4) |
| Sep 17, 20254 | Insider transaction (Form 4) |
| Aug 6, 20254 | Insider transaction (Form 4) |
| Aug 4, 20254 | Insider transaction (Form 4) |
| Aug 4, 20254 | Insider transaction (Form 4) |
| Jul 31, 2025144 | Notice of proposed sale (Form 144) |
| Jul 30, 20253 | Initial insider holdings (Form 3) |
| Jul 3, 20254 | Insider transaction (Form 4) |
| Jul 3, 20254 | Insider transaction (Form 4) |
| Jul 3, 20254 | Insider transaction (Form 4) |
| Jul 3, 20254 | Insider transaction (Form 4) |
| Jul 3, 20254 | Insider transaction (Form 4) |
| Jul 3, 20254 | Insider transaction (Form 4) |
| Jul 3, 20254 | Insider transaction (Form 4) |
| Jul 3, 20254 | Insider transaction (Form 4) |
| Jun 16, 20254 | Insider transaction (Form 4) |
The newest 25 of 97 shown; the full year is on EDGAR.
2024 · 89 filings — 67 × 4, 13 × 144, 5 × SC 13G/A and 3 other forms
| Filed | What it is |
|---|---|
| Dec 17, 20244 | Insider transaction (Form 4) |
| Dec 17, 20244 | Insider transaction (Form 4) |
| Dec 17, 20244 | Insider transaction (Form 4) |
| Dec 16, 2024144 | Notice of proposed sale (Form 144) |
| Dec 2, 20244 | Insider transaction (Form 4) |
| Nov 27, 2024144 | Notice of proposed sale (Form 144) |
| Nov 27, 20244 | Insider transaction (Form 4) |
| Nov 19, 20244 | Insider transaction (Form 4) |
| Nov 18, 20244 | Insider transaction (Form 4) |
| Nov 18, 20244 | Insider transaction (Form 4) |
| Nov 18, 2024144 | Notice of proposed sale (Form 144) |
| Nov 14, 2024SC 13G/A | Passive holder above 5% (Schedule 13G), amended |
| Nov 6, 20244 | Insider transaction (Form 4) |
| Nov 4, 20244 | Insider transaction (Form 4) |
| Nov 4, 20244 | Insider transaction (Form 4) |
| Oct 16, 20244 | Insider transaction (Form 4) |
| Sep 19, 20244/A | Insider transaction (Form 4), amended |
| Sep 17, 20244 | Insider transaction (Form 4) |
| Sep 17, 20244 | Insider transaction (Form 4) |
| Sep 16, 2024144 | Notice of proposed sale (Form 144) |
| Sep 16, 2024144 | Notice of proposed sale (Form 144) |
| Sep 4, 20244 | Insider transaction (Form 4) |
| Aug 5, 20244 | Insider transaction (Form 4) |
| Aug 1, 2024144 | Notice of proposed sale (Form 144) |
| Aug 1, 20244 | Insider transaction (Form 4) |
The newest 25 of 89 shown; the full year is on EDGAR.
2023 · 104 filings — 80 × 4, 15 × 144, 3 × 3 and 3 other forms
Counted, not listed; the year is on EDGAR.
2022 · 104 filings — 97 × 4, 4 × 3, 3 × SC 13G/A
Counted, not listed; the year is on EDGAR.
2021 · 92 filings — 85 × 4, 4 × SC 13G/A, 1 × 3 and 2 other forms
Counted, not listed; the year is on EDGAR.
2020 · 103 filings — 94 × 4, 4 × SC 13G/A, 2 × 4/A and 2 other forms
Counted, not listed; the year is on EDGAR.
2019 · 116 filings — 105 × 4, 4 × 5, 3 × SC 13G/A and 3 other forms
Counted, not listed; the year is on EDGAR.
2018 · 113 filings — 102 × 4, 5 × 3, 3 × SC 13G/A and 3 other forms
Counted, not listed; the year is on EDGAR.
2017 · 118 filings — 113 × 4, 3 × SC 13G/A, 1 × 4/A and 1 other form
Counted, not listed; the year is on EDGAR.
2016 · 136 filings — 120 × 4, 6 × 3, 3 × SC 13G/A and 6 other forms
Counted, not listed; the year is on EDGAR.
2015 · 106 filings — 90 × 4, 5 × SC 13G/A, 3 × 5 and 5 other forms
Counted, not listed; the year is on EDGAR.
2014 · 84 filings — 70 × 4, 4 × 5, 4 × SC 13G/A and 3 other forms
Counted, not listed; the year is on EDGAR.
2013 · 97 filings — 68 × 4, 6 × 3, 6 × 5 and 8 other forms
Counted, not listed; the year is on EDGAR.
2012 · 107 filings — 75 × 4, 8 × 5, 4 × 4/A and 12 other forms
Counted, not listed; the year is on EDGAR.
2011 · 122 filings — 90 × 4, 7 × 4/A, 7 × 5 and 8 other forms
Counted, not listed; the year is on EDGAR.
2010 · 85 filings — 68 × 4, 9 × 5, 3 × SC 13G and 5 other forms
Counted, not listed; the year is on EDGAR.
2009 · 78 filings — 57 × 4, 5 × 3, 4 × CORRESP and 8 other forms
Counted, not listed; the year is on EDGAR.
2008 · 87 filings — 73 × 4, 3 × SC 13G/A, 2 × SC 13G and 9 other forms
Counted, not listed; the year is on EDGAR.
2007 · 63 filings — 47 × 4, 6 × SC 13G/A, 5 × 4/A and 3 other forms
Counted, not listed; the year is on EDGAR.
2006 · 54 filings — 40 × 4, 5 × SC 13G, 3 × 3 and 4 other forms
Counted, not listed; the year is on EDGAR.
2005 · 72 filings — 37 × 4, 7 × CORRESP, 4 × S-3/A and 12 other forms
Counted, not listed; the year is on EDGAR.
2004 · 38 filings — 25 × 4, 7 × SC 13D/A, 4 × SC 13G and 2 other forms
Counted, not listed; the year is on EDGAR.
2003 · 46 filings — 26 × 4, 5 × SC 13D/A, 5 × SC 13G/A and 5 other forms
Counted, not listed; the year is on EDGAR.
2002 · 9 filings — 2 × 4, 2 × SC 13G, 1 × 3 and 4 other forms
Counted, not listed; the year is on EDGAR.
2001 · 3 filings — 1 × NT 10-K, 1 × S-8, 1 × SC 13G
Counted, not listed; the year is on EDGAR.
2000 · 3 filings — 1 × SC 13D, 1 × SC 13D/A, 1 × SC 13G
Counted, not listed; the year is on EDGAR.
1999 · 2 filings — 1 × SC 13G, 1 × SC 13G/A
Counted, not listed; the year is on EDGAR.
1998 · 4 filings — 1 × S-8, 1 × SC 13D, 1 × SC 13G and 1 other form
Counted, not listed; the year is on EDGAR.
1997 · 2 filings — 1 × SC 13G, 1 × SC 13G/A
Counted, not listed; the year is on EDGAR.
1996 · 2 filings — 1 × SC 13D, 1 × SC 13G/A
Counted, not listed; the year is on EDGAR.
1995 · 3 filings — 1 × 15-15D, 1 × S-8, 1 × SC 13G/A
Counted, not listed; the year is on EDGAR.
1994 · 5 filings — 3 × S-2/A, 1 × S-2, 1 × SC 13G
Counted, not listed; the year is on EDGAR.
About this data
Clean Harbors Inc. (CLH) has 2,664 filings on EDGAR going back to 1994: 34 annual reports, 102 quarterly reports and 237 current reports, plus proxy statements, insider forms and ownership schedules. Its latest annual report, a 10-K, was filed on Feb 18, 2026 for the fiscal year ended Dec 31, 2025. The most recent 8-K, on Sep 18, 2026, covered other events. Over the last 13 months insiders sold $65.0M in 12 sales and bought $136K in 1 purchase; 62 other transactions (awards, exercises, tax withholding, gifts and plan purchases). Not investment advice.
Every row is a filing EDGAR lists for the registrants that have been Clean Harbors Inc., read from the SEC’s submissions index each morning; a filing accepted after that read appears the next day. Where a company changed its filing entity (a holding-company reorganisation, Google into Alphabet) the predecessor’s filings are shown for the years it filed as the company, derived from the filings themselves. Dates are the filing date; the period is the report’s own. The latest 3 years of reports are listed in full, the next years to 10 without their 8-Ks, and older years are counted; the other forms are counted too, with the newest 25 of each of the latest 3 years shown. Insider transactions are the Form 4 and Form 5 documents themselves, filed since January 2026, every number as the insider filed it: a day’s lots are summed, a blank price adds its shares and no dollars, and a purchase through an employee stock plan is a plan purchase, not insider buying. The documents stay on sec.gov, public domain, and every link opens the SEC’s copy. ChartRow does not summarise or interpret filings.
FAQ#
- Where can I read CLH's latest 10-K?
- CLH's latest annual report, a 10-K, was filed on Feb 18, 2026 for the fiscal year ended Dec 31, 2025. It is linked above and opens on EDGAR, the SEC's own site, where every exhibit is also listed.
- When did CLH last file an 8-K?
- On Sep 18, 2026: other events. An 8-K reports a material event between quarterly reports; the one that furnishes the quarter's results is filed under Item 2.02, last on Jul 29, 2026.
- Are CLH insiders buying or selling?
- Over the last 13 months insiders sold $65.0M in 12 sales and bought $136K in 1 purchase; 62 other transactions (awards, exercises, tax withholding, gifts and plan purchases). The most recent sale: GERSTENBERG ERIC W (CO-CEO) sold 2,500 shares on Aug 14, 2026 for $803K. Every figure is as the insider filed it on Form 4; a sale under a 10b5-1 plan was scheduled in advance.
- How many SEC filings has CLH made?
- 2,664 filings are on EDGAR under the registrant records that have been Clean Harbors Inc., going back to 1994; 1,965 of them are insider ownership forms (Forms 3, 4, 5 and 144).