CLH
Clean Harbors Inc
Clean Harbors Inc historical holders
total: 4
Durable Capital Partners Clean Harbors Inc transactions over time
- Total transactions:
- 3
- New positions:
- 1
- Added:
- 2
- Held since:
- 2025 Q3
- Held for:
- 3 quarters
- Latest activity:
- 2026 Q1
Henry Ellenbogen has been an institutional investor in Clean Harbors Inc (CLH) since 2025 Q3. According to 2026 Q1 report, Henry Ellenbogen holds 1,050,973 shares with a market value of roughly $301.35M representing 3.10% of their equity portfolio. The fund/company first acquired CLH in 2025 Q3, initially purchasing 573,666 shares. Since the initial investment, Durable Capital Partners has made 2 more transactions in this position.
Does Henry Ellenbogen still hold CLH?
Yes, Henry Ellenbogen continues to hold Clean Harbors Inc (CLH). According to their 2026 Q1 report, they maintain a position of 1,050,973 shares valued at approximately $301.35M, representing 3.10% of their equity portfolio.
When did Henry Ellenbogen first invest in CLH?
Henry Ellenbogen first invested in Clean Harbors Inc (CLH) in 2025 Q3 at the reported quarter-end price of $232.22 per share, acquiring 573,666 shares in their initial purchase.
What is Henry Ellenbogen's average cost basis for CLH?
Based on historical transaction data, Henry Ellenbogen's estimated cost basis for Clean Harbors Inc (CLH) is approximately $244.00 per share. This represents their average reported price* across all buy transactions.
Estimated cost basis*
- Weighted AVG buy price:
- $244.00
CLH transactions history by Durable Capital Partners
3 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2026 Q1
|
3.10%
|
1,050,973
|
$286.73
|
$301,345,488
|
+25.90% (+216,210)
|
+0.64%
|
|
2025 Q4
|
1.85%
|
834,763
|
$234.48
|
$195,735,228
|
+45.51% (+261,097)
|
+0.58%
|
|
2025 Q3
|
0.99%
|
573,666
|
$232.22
|
$133,216,719
|
new
|
+0.99%
|
* Shares, change to shares, sold shares, shares held after: split-adjusted.
* Reported price: this doesn't represent the actual buy or sell price. It is the split-adjusted price of the security as of the last day of the reported period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
* Estimated cost basis: based on "Reported price*" (not earlier than 2013 Q2). Calculation starts from the latest "new buy" activity to the latest "close out" activity (if any).
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* New buy or own: this means there is no earlier reporting (for us or in general). So we can't know if the actual purchase of the security happened at the reported period or earlier.