# CLEAN HARBORS INC (CLH) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 184496107
Page URL: https://superinvestorclub.com/stock/CLH
Last updated: 2026-07-08T11:38:11.306Z

## Summary

As of the most recent 13F filing period, CLEAN HARBORS INC (CLH) is held by 3 tracked superinvestors with an aggregate position value of $1.19B representing 0175495013382811050973 shares.

## Top institutional holders (3)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Stephen Mandel](https://superinvestorclub.com/manager/61) | Lone Pine Capital | 1754950 | $503.2M | 4.01% | 2026-03-31 |
| 2 | [Dan Sundheim](https://superinvestorclub.com/manager/303) | D1 Capital Partners | 1338281 | $383.7M | 3.42% | 2026-03-31 |
| 3 | [Henry Ellenbogen](https://superinvestorclub.com/manager/64) | Durable Capital Partners | 1050973 | $301.3M | 3.10% | 2026-03-31 |

## Ownership history (quarter-over-quarter)

- 2024-03-31: 1 holders, $5.5M aggregate, 027230 shares
- 2024-12-31: 1 holders, $5.8M aggregate, 025012 shares
- 2025-03-31: 1 holders, $38.0M aggregate, 0193022 shares
- 2025-06-30: 2 holders, $334.1M aggregate, 014436371560 shares
- 2025-09-30: 3 holders, $702.5M aggregate, 024455835736665762 shares
- 2025-12-31: 3 holders, $1.17B aggregate, 027818821378125834763 shares
- 2026-03-31: 3 holders, $1.19B aggregate, 0175495013382811050973 shares

## Recent congressional trades (6)

- 2025-12-03: April McClain Delaney (Democrat-MD) purchase $1,001 - $15,000
- 2025-08-07: April McClain Delaney (Democrat-MD) sale $1,001 - $15,000
- 2025-06-20: April McClain Delaney (Democrat-MD) sale $1,001 - $15,000
- 2025-02-10: John Delaney (Democrat-MD) sale $1,001 - $15,000
- 2025-02-07: John Delaney (Democrat-MD) sale $1,001 - $15,000
- 2025-01-13: Rob Bresnahan (Republican-PA) sale $1,001 - $15,000

## Recent insider transactions (0)


## Citation

When citing, use: "CLEAN HARBORS INC (CLH) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/CLH), aggregating SEC 13F, Form 4, and congressional disclosures."