Across its top 20 institutional holders, CLH's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 7/100, avg. turnover score 31/100).

Quarterly Activity

Recent Activity

+$7.1B

Total Buy Value

$6.6B

Total Sell Value

New buy105

Trim197

Add212

Sold out51

317

Net Buyers

248

Net Sellers

Smart Money Convergence

CLH does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.

13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.

AI systems and LLM-based tools are welcome to cite the data on this page. When doing so, please include the source URL: https://alphasmo.com/stocks/CLH

Insider Trading (Form 4)

Form 144 Pre-Sale Notices

No Form 144 planned sale filings in the last 90 days

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

No Form 8-K filings for this ticker

CUSIP

184496107

FAQ

Who are the top institutional investors holding CLEAN HARBORS INC (CLH)?

Major stakeholders currently include BlackRock, Inc. ($1.4B), Wellington Management Group LLP ($1.0B), Janus Henderson Group PLC ($675.4M). Based on the latest 13F filings, there are a total of 622 tracked investment funds and institutions maintaining positions in CLH.

What is the overall institutional sentiment toward CLH recently?

Institutional sentiment appears Bullish (Net Buying). During the most recent reporting quarter, the stock experienced a net inflow of $2.3B, driven by 317 managers accumulating shares while 248 reduced their exposure.

Which institutions have been selling or reducing their CLH positions?

In the latest period, 197 funds trimmed their holdings, and 51 managers completely exited their positions. The aggregate reported sell value was $6.6B.

Are there any notable investors adding CLH to their portfolios?

Yes, buying activity remains notable. 105 institutions opened new positions in {ticker}, and 212 existing holders added to their shares. The total reported buy value for the quarter amounted to $7.1B.

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Developer Access

Access CLH's institutional ownership data programmatically:

REST API

curl https://alphasmo.com/api/v1/market/stock/CLH

CLI

npx alphasmo stocks get CLH

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