Durable Capital Partners LP: CLEAN HARBORS INC (CLH): Quarterly 13F Position History
As of Q1 2026, Durable Capital Partners LP reported 1,050,973 shares of CLEAN HARBORS INC (CLH), worth $301.3M and representing 3.1% of its 13F equity book. Quarter-over-quarter share count change: + 216,210 (+25.9%) . The position first appeared in Q3 2025 and has been disclosed across 3 13F-HR filings in Pactolio's tracked window.
- 1,050,973Shares Held (Latest Filing)
- $301.3MReported Market Value (Latest Filing)
- 3.1%Portfolio Weight (% of 13F Equity Book)
- +216,210Quarter-over-Quarter Share Change
- +$105.6MQuarter-over-Quarter Value Change
- 1,050,973Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 3 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,050,973 | +216,210 | +25.9% | $301.3M | 3.1% | $286.7 |
| Q4 2025 | 834,763 | +261,097 | +45.5% | $195.7M | 1.9% | $234.5 |
| Q3 2025 | 573,666 | — | — | $133.2M | 1.0% | $232.2 |
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 Durable Capital Partners LP first disclose a CLH position in 13F-HR filings?
Durable Capital Partners LP first reported CLEAN HARBORS INC (CLH) on its 13F-HR filing for the period ending 2025-09-30 (Q3 2025). The position has appeared on 3 reported quarters within Pactolio's tracked window.
What was Durable Capital Partners LP's most recent quarter-over-quarter share-count change in CLH?
Between Q4 2025 and Q1 2026, Durable Capital Partners LP added 216,210 shares of CLH (+25.9%), bringing the total reported position to 1,050,973 shares at a market value of $301.3M.
Does the implied price-per-share represent Durable Capital Partners LP'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.