D1 Capital Partners L.P. — CLEAN HARBORS INC CLH: Quarterly 13F Position History
D1 Capital Partners L.P. has reported CLEAN HARBORS INC (CLH) on 5 13F-HR filings in Pactolio's tracked window, first appearing in Q1 2025. As of Q1 2026, the position is sized at 1,338,281 shares ($383.7M market value, 3.42% of the equity book). Quarter-over-quarter share count change: 1,443,601 (-51.9%) .
- 1,338,281Shares Held (Latest Filing)
- $383.7MReported Market Value (Latest Filing)
- 3.42%Portfolio Weight (% of 13F Equity Book)
- 1,443,601Quarter-over-Quarter Share Change
- -$268.6MQuarter-over-Quarter Value Change
- 2,781,882Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 5 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,338,281 | 1,443,601 | -51.9% | $383.7M | 3.42% | $286.73 |
| Q4 2025 | 2,781,882 | +336,299 | +13.8% | $652.3M | 6.09% | $234.48 |
| Q3 2025 | 2,445,583 | +1,001,946 | +69.4% | $567.9M | 6.52% | $232.22 |
| Q2 2025 | 1,443,637 | +1,250,615 | +647.9% | $333.7M | 4.63% | $231.18 |
| Q1 2025 | 193,022 | — | — | $38.0M | 0.58% | $197.10 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did D1 Capital Partners L.P. first disclose a CLH position in 13F-HR filings?
D1 Capital Partners L.P. first reported CLEAN HARBORS INC (CLH) on its 13F-HR filing for the period ending 2025-03-31 (Q1 2025). The position has appeared on 5 reported quarters within Pactolio's tracked window.
What was D1 Capital Partners L.P.'s most recent quarter-over-quarter share-count change in CLH?
Between Q4 2025 and Q1 2026, D1 Capital Partners L.P. reduced its CLH position by 1,443,601 shares (-51.9%), leaving 1,338,281 shares at a market value of $383.7M.
Does the implied price-per-share represent D1 Capital Partners L.P.'s cost basis in CLH?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.