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See how Context works →On the price, the facts of the public record■Insider buy□Insider sell●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Oct 5, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
- Sep 18, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
- Aug 14, 2026Reported sale · Form 4ERIC W GERSTENBERG, CO-CEO · $803.3KOpen the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record2,5089 flagged findings
Reported transactions (Form 4)40since Mar 13, 2026 · and 4 other holdings
Corporate events (8-K)30since Jun 3, 2020
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
What the company does
Clean Harbors, Inc., headquartered in Norwell, Massachusetts, is a provider of waste management and industrial services for commercial customers, specializing in the collection, transportation, treatment and disposal of hazardous waste, but also offering services for non-hazardous waste. The company has 870 operating locations in 630 properties in the U.S. and Canada including a network of over 100 waste disposal facilities such as incinerators, landfills, treatment, storage and disposal facilities. It also owns Safety-Kleen, the largest re-refiner and recycler of used oil in North America. In 2024, the company received 91% of its revenues in the United States and 9% of its revenues in Canada. In 2024, the company's revenues primarily came from the following industries: chemical industry (15%), manufacturing (14%), refineries (13%), automotive industry (8%), utilities (6%), base and blended oils (5%), oil and gas industry (5%), transportation (4%), government (4%) and retail (3%).
Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.
Regulatory history
Topics detected in its SEC reports, with the original excerpt.
Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.
- 2026-05-06capital return (buybacks/dividends)recentOpen filing ↗“…Pursuant to Publicly Announced Plan During the three months ended March 31, 2026 and March 31, 2025, we repurchased and retired…”
+1 more passage from the same document
- “…upon vesting of restricted stock granted to our employees under our equity incentive plans. (2) The average price paid per…”
Original excerpts from SEC filings, untranslated. Not advice and not a prediction.
The 25 most recent filings (of 2,508)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
- Oct 5, 268-K ↗Current report · Entered a material agreement
- Sep 18, 268-K ↗Current report · Other events
- Aug 18, 26Form 4 ↗Insider transaction
- Aug 14, 26Form 144 ↗Notice of proposed sale
Insider transaction · 7 Form 4/A filingsshow all 7hide
- Aug 14, 26Form 4/A ↗Insider transaction · amendment
- Aug 14, 26Form 4/A ↗Insider transaction · amendment
- Aug 14, 26Form 4/A ↗Insider transaction · amendment
- Aug 14, 26Form 4/A ↗Insider transaction · amendment
- Aug 14, 26Form 4/A ↗Insider transaction · amendment
- Aug 14, 26Form 4/A ↗Insider transaction · amendment
- Aug 14, 26Form 4/A ↗Insider transaction · amendment
- Aug 12, 26Form 4 ↗Insider transaction
- Aug 12, 268-K ↗Current report · Other events
- Aug 11, 26Form 4 ↗Insider transaction
- Aug 6, 26SCHEDULE 13G ↗Passive stake · FMR LLC · 5.7% · event on Jun 30, 26
- Aug 3, 26Form 144 ↗Notice of proposed sale
- Aug 3, 26Form 4 ↗Insider transaction
- Jul 29, 2610-Q ↗Quarterly report
- Jul 29, 268-K ↗Current report · Results
2,508 filings on record, the oldest from Feb 25, 94.
Listing the 25 most recent filings of the 2,508 on record.
26543
- Oct 5, 26Entered a material agreement+3 more in the same filing8-K 1.01 ↗
- May 20, 26A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Oct 10, 25Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Oct 11, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Sep 3, 24A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Jul 2, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- May 23, 24A senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
- Mar 25, 24Entered a material agreement+3 more in the same filing8-K 1.01 ↗
- Dec 28, 23Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Mar 16, 23A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Mar 1, 23A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Jan 25, 23Entered a material agreement+2 more in the same filing8-K 1.01 ↗
9 older filings not shown · The record reaches back to Feb 16, 05.
Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.
- Dec 3, 08Listing notice (8-K 3.01)+1 more in the same filing8-K 3.01 ↗
- Mar 15, 05Past accounts declared unreliable and being restated+2 more in the same filing8-K 4.02 ↗
The full record holds 2 stress filings.
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- Wellington Management Group LLP6.8%Mar 31, 26SCHEDULE 13G/A ↗4 co-filers on this document — the figure is the largest single stake, not their sum. · 3 earlier filings
- FMR LLC5.7%Jun 30, 26SCHEDULE 13G ↗2 co-filers on this document — the figure is the largest single stake, not their sum.
- D1 Capital Partners L.P.2.5%Mar 31, 26SCHEDULE 13G/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
Sale intention announced
On Aug 14, GERSTENBERG ERIC W filed notice of intent to sell up to $805K.
A notice is not a sale: it may not go ahead, may happen in part, or at a different price.
After the notice, they sold $803K on Aug 14, per their Form 4. That is 100% of the shares announced so far, and the window is still open.
View notice (Form 144) ↗+1 more recent notices · 1 with a later sale
Stock compensation, tax and giftsshow the 33 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- Jul 17, 26Tax$393KALAN S MCKIMEXEC CHAIR, CTO.↗
- Jul 1, 26Tax$390KALAN S MCKIMEXEC CHAIR, CTO.↗
- Jul 1, 26Tax$164KERIC W GERSTENBERGCO-CEO↗
- Jul 1, 26Tax$237KBrian P WeberEVP (CHESI)↗
- Jul 1, 26Tax$130KEric J. DugasEVP CHIEF FINANCIAL OFFICER↗
- Jul 1, 26Tax$104KSharon M. GabrielEVP/CIO (CHESI)↗
- Jul 1, 26Tax$90KRebecca UnderwoodPRESIDENT & EVP FACILITIES↗
- Jul 1, 26Tax$12KCharles H. Geer IIEVP, Industrial Services↗
- Jul 1, 26Tax$511KGEORGE L CURTISEXEC. VICE PRESIDENT (CHESI)↗
- Jul 1, 26Tax$300KMichael Louis BattlesCO-CEO↗
- Jun 1, 26Tax$482KJeroen DiderichEVP&President of Sales&Service↗
- May 20, 26Compensationamount n/aJOHN T PRESTON↗
- May 20, 26Compensationamount n/aEDWARD G GALANTE↗
- May 20, 26Compensationamount n/aAndrea Robertson↗
- May 20, 26Compensationamount n/aRobert Willett↗
- May 20, 26Compensationamount n/aShelley Stewart JR↗
- May 20, 26Compensationamount n/aAlison A. Quirk↗
- May 20, 26Compensationamount n/aJohn R. Welch↗
- May 20, 26Compensationamount n/aLauren States↗
- May 20, 26Compensationamount n/aMarcy L. Reed↗
- May 20, 26Compensationamount n/aKaryn Polito↗
- May 11, 26Giftamount n/aAndrea Robertson↗
- May 11, 26Compensation$136KKaryn Polito↗
- Mar 13, 26Tax$365KALAN S MCKIMEXEC CHAIR, CTO.↗
- Mar 13, 26Tax$282KERIC W GERSTENBERGCO-CEO↗
- Mar 13, 26Otheramount n/aERIC W GERSTENBERGCO-CEO↗
- Mar 13, 26Tax$101KGEORGE L CURTISEXEC. VICE PRESIDENT (CHESI)↗
- Mar 13, 26Otheramount n/aGEORGE L CURTISEXEC. VICE PRESIDENT (CHESI)↗
- Mar 13, 26Tax$277KBrian P WeberEVP (CHESI)↗
- Mar 13, 26Otheramount n/aBrian P WeberEVP (CHESI)↗
- Mar 13, 26Tax$332KMichael Louis BattlesCO-CEO↗
- Mar 13, 26Otheramount n/aMichael Louis BattlesCO-CEO↗
- Mar 13, 26Tax$182KEric J. DugasEVP CHIEF FINANCIAL OFFICER↗
The full record holds 380 transactions and goes back to Dec 31, 22.
Its sector and its market
Clean Harbors Inc. among Industrials companies
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Coverage
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- End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
- Series quality
- 250 clean closes in the period.
- SEC records
- 2,508 documents on file, from Feb 25, 1994 to Oct 5, 2026.
- Company description
- Wikipedia, read on Sep 3, 2026.
- This page
- Generated on Oct 19, 2026; refreshed through the day.
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Which SEC documents appear here?
Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.
Why does a European company show no SEC records?
It depends on the company: some European issuers file a 20-F or 6-K with the SEC and others don't. The profile shows whatever is on record; when there is nothing, it says so rather than guessing why. Europe does not yet have a common filing archive like EDGAR in the United States. The EU will open its own, ESAP, in July 2027 (managers' transactions arrive in January 2028), and we plan to add it once it is available.
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