Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

CLEAN HARBORS INC

CLH · NYSE · CIK 0000822818 · Industrials · Waste Management

INSIDER SIGNAL

No active buy signal

1 qualifying P purchase group
in the current 180-day scoring window

29 Form 4 transaction lines observed in the same window
3 sales · 25 option, withholding, award, gift or other lines

Last qualifying purchase2026-05-11 · Polito Karyn · $135.8K

WHY NO ACTIVE SIGNAL?

Purchase activityPresent
Recent buying1 qualifying line group(s)
Recent salesLow
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
GERSTENBERG ERIC WCO-CEO
○○▼
Robertson AndreaDirector
○○▼
Polito KarynDirector
○●○
MCKIM ALAN SEXEC CHAIR, CTO.
○○
States LaurenDirector
○▼
Dugas Eric J.EVP CHIEF FINANCIAL OFFICER
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 14 additional owner(s) remain in Form 4 evidence.

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: Polito Karyn · $135.8K
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-05-11–2026-05-11

Roles in the peak window: Director. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-05-11 · Polito Karyn.

Recent Form 4 activity

1Purchases
16Sales
85Other Form 4 lines
72SEC filings · 365 days
BUYING1 qualifying P line(s) · 180 days
SELLING3 sale line(s) · context only
OTHER25 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
1,078,261
Previous report
1,128,021
Avg daily volume
414,683
Days to cover
2.6

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-05-11Polito KarynPurchase (P)Common Stock460USD 295.13USD 135,760SEC filing ↗
2025-08-01Battles Michael LouisPurchase (P)Common Stock2,000USD 233.50USD 467,000SEC filing ↗
2025-03-10Dugas Eric J.Purchase (P)Common Stock1,050USD 191.38USD 200,949SEC filing ↗
2022-05-12Battles Michael LouisPurchase (P)Common Stock2,000USD 88.35USD 176,700SEC filing ↗
2020-05-13Battles Michael LouisPurchase (P)Common Stock1,650USD 46.45USD 76,642SEC filing ↗
2020-03-23Speights RobertPurchase (P)Common Stock641USD 39.00USD 24,999SEC filing ↗
2020-03-19Knapp Jeffrey HerbertPurchase (P)Common Stock500USD 32.80USD 16,400SEC filing ↗
2020-03-18Speights RobertPurchase (P)Common Stock1,275USD 39.15USD 49,916SEC filing ↗
2020-03-16Speights RobertPurchase (P)Common Stock545USD 45.97USD 25,054SEC filing ↗

Form 4 evidence

102 transaction lines in the latest 365-day window; 752 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-14GERSTENBERG ERIC WSale (S)Common Stock2,500USD 321.34USD 803,350SEC filing ↗
2026-08-03Robertson AndreaSale (S)Common Stock789USD 314.01USD 247,754SEC filing ↗
2026-07-17MCKIM ALAN STax withholding (F)Common Stock1,265USD 310.58USD 392,884SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-14GERSTENBERG ERIC WSale (S)Common Stock2,500USD 321.34USD 803,350SEC filing ↗
2026-08-03Robertson AndreaSale (S)Common Stock789USD 314.01USD 247,754SEC filing ↗
2026-07-17MCKIM ALAN STax withholding (F)Common Stock1,265USD 310.58USD 392,884SEC filing ↗
2026-07-01GERSTENBERG ERIC WTax withholding (F)Common Stock564USD 290.74USD 163,977SEC filing ↗
2026-07-01Dugas Eric J.Tax withholding (F)Common Stock447USD 290.74USD 129,961SEC filing ↗
2026-07-01Battles Michael LouisTax withholding (F)Common Stock1,032USD 290.74USD 300,044SEC filing ↗
2026-07-01CURTIS GEORGE LTax withholding (F)Common Stock1,757USD 290.74USD 510,830SEC filing ↗
2026-07-01Weber Brian PTax withholding (F)Common Stock814USD 290.74USD 236,662SEC filing ↗
2026-07-01Underwood RebeccaTax withholding (F)Common Stock311USD 290.74USD 90,420SEC filing ↗
2026-07-01MCKIM ALAN STax withholding (F)Common Stock1,343USD 290.74USD 390,464SEC filing ↗
2026-07-01Geer Charles H. IITax withholding (F)Common Stock40USD 290.74USD 11,630SEC filing ↗
2026-07-01Gabriel Sharon M.Tax withholding (F)Common Stock359USD 290.74USD 104,376SEC filing ↗
2026-07-01GERSTENBERG ERIC WTax withholding (F)Common Stock564USD 290.74USD 163,977SEC filing ↗
2026-07-01Dugas Eric J.Tax withholding (F)Common Stock447USD 290.74USD 129,961SEC filing ↗
2026-06-01Diderich JeroenTax withholding (F)Common Stock1,717USD 281.00USD 482,477SEC filing ↗
2026-05-26States LaurenSale (S)Common Stock789USD 286.19USD 225,804SEC filing ↗
2026-05-20Willett RobertAward / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-20Welch John R.Award / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-20Stewart Shelley JRAward / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-20States LaurenAward / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-20Robertson AndreaAward / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-20Reed Marcy L.Award / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-20Quirk Alison A.Award / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-20Polito KarynAward / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-20PRESTON JOHN TAward / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-20GALANTE EDWARD GAward / grant (A)Common Stock652USD 0.00USD 0SEC filing ↗
2026-05-11Polito KarynPurchase (P)Common Stock460USD 295.13USD 135,760SEC filing ↗
2026-05-11Polito KarynAward / grant (A)Common Stock460USD 295.13USD 135,760SEC filing ↗
2026-05-11Robertson AndreaGift (G)Common Stock342USD 0.00USD 0SEC filing ↗
2026-03-18GERSTENBERG ERIC WSale (S)Common Stock1,000USD 293.00USD 293,000SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerCLH
CIK0000822818
SectorIndustrials
IndustryWaste Management Yahoo Finance
SEC SIC4955 Hazardous Waste Management
ExchangeNYSE

Data coverage

Local Form 4 history752 transaction lines from 2020-01-01 to 2026-08-14
9 P purchase lines · 144 S sale lines · 599 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.