Clean Harbors
CLH · NYSE
Who owns CLH
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 42.6% of CLH’s shares.
- BlackRock Institutional Trust Company, N.A.8.2%
- Wellington Management Company, LLP6.0%
- Fidelity Management & Research Company LLC5.6%
- McKim (Alan S)4.3%
- Next 6 largest institutions18.5%
- All other shareholders57.4%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 4.33M | 8.21% |
| Wellington Management Company, LLP | 3.16M | 5.98% |
| Fidelity Management & Research Company LLC | 2.95M | 5.59% |
| McKim (Alan S) | 2.26M | 4.29% |
| Vanguard Capital Management, LLC | 2.18M | 4.14% |
| Vanguard Portfolio Management, LLC | 1.98M | 3.76% |
| Janus Henderson Investors | 1.60M | 3.03% |
| State Street Investment Management (US) | 1.58M | 3.00% |
| D1 Capital Partners L.P. | 1.32M | 2.49% |
| Geode Capital Management, L.L.C. | 1.13M | 2.14% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Mid-Cap ETF | 1.74M | 3.29% |
| Fidelity Contrafund | 1.72M | 3.26% |
| Vanguard Total Stock Market Index Fund | 1.52M | 2.87% |
| Vanguard Small-Cap Index Fund | 1.09M | 2.07% |
| Janus Henderson Enterprise Fund | 867.64K | 1.64% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $135.76K (1 trade) and sold $1.28M (3 trades) of CLH on the open market.
| Insider | Type | Shares | Value |
|---|---|---|---|
| GERSTENBERG ERIC W | Sale | 2.50K | $803.35K |
| Robertson Andrea | Sale | 789 | $247.75K |
| MCKIM ALAN S | Tax withholding | 1.26K | $392.88K |
| Dugas Eric J. | Tax withholding | 447 | $129.96K |
| Battles Michael Louis | Tax withholding | 1.03K | $300.04K |
| CURTIS GEORGE L | Tax withholding | 1.76K | $510.83K |
| GERSTENBERG ERIC W | Tax withholding | 564 | $163.98K |
| Geer Charles H. II | Tax withholding | 40 | $11.63K |
| Underwood Rebecca | Tax withholding | 311 | $90.42K |
| Gabriel Sharon M. | Tax withholding | 359 | $104.38K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| April McClainHouse | Sale | $1K–$15K | Apr 30, 2026 |
| April McClainHouse | Purchase | $15K–$50K | Feb 23, 2026 |
| April McClainHouse | Purchase | $1K–$15K | Dec 3, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 1.08M
- Days to cover
- 2.60
- % of shares outstanding
- 2.04%
- Average daily volume
- 414.68K
- Change since last report
- −4.4%
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