Clean Harbors, Inc (CLH)
NYSE: CLH · Hazardous Waste Management · Norwell, MA · filing with the SEC since 1994
Grade6.6
◀ Past 7.5● Present 7.0▶ Future 5.1
Who owns Clean Harbors, Inc
As filed with the SECHolders of 5% or more
2
Wellington Management Group LLP holds 6.8% of Common Stock, as its SCHEDULE 13G/A filed May 15, 2026 says.
Directors and officers
21
report now, of 42 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 2 named at left.
Holders of 5% or moreshare of the class, as filed
Wellington Management Group LLP
SCHEDULE 13G/A · filed May 15, 2026 · Common Stock · 9.7% in Feb 10, 2026
Fmr LLC
SCHEDULE 13G · filed Aug 6, 2026 · COMMON STOCK
D1 Capital Partners L.P.
SCHEDULE 13G/A · filed May 15, 2026 · Common Stock, par value $0.01 per share · reported falling below 5%, from 5.2% in Feb 17, 2026
The Vanguard Group
SCHEDULE 13G/A · filed Mar 26, 2026 · Common Stock · reported falling below 5%
What CLH reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Hepaco
A company bought · acquisition · Mar 2025 · owns, named in the 10-K filed Feb 18, 2026
Noble Oil Services , Inc. Acquisition
A company bought · acquisition · Mar 2025 · owns, named in the 10-K filed Feb 18, 2026
Thompson Industrial
A company bought · acquisition · Mar 2024 · owns, named in the 10-K filed Feb 18, 2026
136 subsidiaries in 4 countries, from the list filed with the 10-K filed Feb 18, 2026.
Insider tradesForm 4
16sales
2purchases
0sales on a scheduled plan
9people selling
$65.2Msold, in dollars
$200,000bought, in dollars
Open-market trades on Form 4 from Nov 10, 2025 to Nov 10, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 10, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window10 of 42 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Mckim Alan S | EXEC CHAIR, CTO. | 2 | $57.4M | 0 | 0 | $0 |
| Gerstenberg Eric W | CO-CEO | 6 | $2.9M | 0 | 0 | $0 |
| Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | 2 | $1.6M | 0 | 0 | $0 |
| Weber Brian P | EVP (CHESI) | 1 | $1.4M | 0 | 0 | $0 |
| Gabriel Sharon M. | EVP/CIO (CHESI) | 1 | $1.0M | 0 | 0 | $0 |
| Reed Marcy L. | director | 1 | $200,000 | 0 | 0 | $0 |
| Robertson Andrea | director | 1 | $200,000 | 0 | 0 | $0 |
| States Lauren | director | 1 | $200,000 | 0 | 0 | $0 |
| Welch John R. | director | 1 | $200,000 | 0 | 0 | $0 |
| Polito Karyn | director | 0 | $0 | 0 | 2 | $200,000 |