Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
607 institutional managers reported holding CLH for the quarter ended Mar 31, 2026. Together they hold about 93% of shares outstanding; the top 10 hold 46%. 109 opened new positions; 56 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 4.80M | 9.06% | $1.38B | added +4.4% | ≤2013 |
| Vanguard Group | 4.53M | 8.54% | $1.30B | added +0.6% | ≤2013 |
| Wellington Management | 3.58M | 6.75% | $1.03B | trimmed -31% | 2013 Q3 |
| Janus Henderson | 2.36M | 4.45% | $675.3M | trimmed -0.9% | 2021 Q3 |
| FMR (Fidelity) | 2.10M | 3.96% | $602.5M | added +464.6% | 2018 Q3 |
| Lone Pine Capital (focused) | 1.75M | 3.31% | $503.2M | added +27.3% | 2025 Q4 |
| State Street | 1.54M | 2.90% | $440.8M | added +2.3% | ≤2013 |
| D1 Capital Partners L.p. (focused) | 1.34M | 2.52% | $383.7M | trimmed -51.9% | 2025 Q1 |
| Pictet Asset Management Holding SA | 1.24M | 2.34% | $356.1M | trimmed -34.1% | 2019 Q3 |
| Clearbridge Investments, LLC | 1.20M | 2.27% | $344.9M | trimmed -9.5% | 2023 Q1 |
| Select Equity Group | 1.13M | 2.13% | $324.5M | added +33.2% | 2023 Q1 |
| Durable Capital Partners LP (focused) | 1.05M | 1.98% | $301.3M | added +25.9% | 2025 Q3 |
| Geode Capital | 945.9k | 1.78% | $271.2M | added +3.1% | ≤2013 |
| Bessemer Group INC | 932.0k | 1.76% | $267.2M | added +1.8% | 2022 Q3 |
| Snyder Capital Management L P | 929.3k | 1.75% | $266.5M | trimmed -19.2% | ≤2013 |
| Goldman Sachs | 929.1k | 1.75% | $266.4M | added +258.1% | ≤2013 |
| First Trust Advisors LP | 778.4k | 1.47% | $223.2M | added +10% | 2016 Q1 |
| UBS | 743.9k | 1.40% | $213.3M | trimmed -35.4% | ≤2013 |
| Two Sigma | 724.0k | 1.37% | $207.6M | added +46.9% | 2022 Q1 |
| Dimensional Fund Advisors | 608.7k | 1.15% | $174.5M | trimmed -1.8% | ≤2013 |
| Nordea Investment Management AB | 568.4k | 1.07% | $163.0M | trimmed -45.4% | 2025 Q3 |
| FIL LTD | 509.7k | 0.96% | $146.1M | added +44.5% | 2018 Q4 |
| T. Rowe Price Investment Management, INC. | 477.3k | 0.90% | $136.8M | added +1456.4% | 2025 Q3 |
| Charles Schwab Investment Management | 474.6k | 0.90% | $136.1M | trimmed -0.6% | ≤2013 |
| Northern Trust | 448.7k | 0.85% | $128.6M | trimmed -1.8% | ≤2013 |
| William Blair Investment Management, LLC | 443.1k | 0.84% | $127.0M | added +30.6% | 2025 Q2 |
| Invesco | 421.5k | 0.80% | $120.8M | added +16.9% | ≤2013 |
| Vaughan Nelson Investment Management, L.p. | 386.5k | 0.73% | $110.8M | added +4.2% | 2025 Q2 |
| BNY Mellon | 382.2k | 0.72% | $109.6M | trimmed -4.1% | ≤2013 |
| Quantinno Capital Management LP | 380.9k | 0.72% | $109.2M | added +15.4% | 2022 Q3 |
| Davenport & CO LLC | 342.6k | 0.65% | $98.2M | trimmed -19% | 2023 Q4 |
| Bank OF America CORP /DE/ | 311.9k | 0.59% | $89.4M | trimmed -24.1% | ≤2013 |
| Morgan Stanley | 290.3k | 0.55% | $83.2M | added +9.9% | ≤2013 |
| Westfield Capital Management CO LP | 261.1k | 0.49% | $74.9M | added +6.3% | 2025 Q2 |
| M.d. Sass, LLC (focused) | 252.5k | 0.48% | $72.4M | trimmed -24.4% | 2023 Q2 |
| Silvercrest Asset Management Group LLC | 240.3k | 0.45% | $68.9M | trimmed -3.9% | 2023 Q2 |
| 12th Street Asset Management Company, LLC (focused) | 204.7k | 0.39% | $58.7M | trimmed -2.6% | 2014 Q4 |
| Neuberger Berman Group LLC | 194.0k | 0.37% | $55.6M | added +11.3% | ≤2013 |
| AQR Capital | 180.7k | 0.34% | $51.8M | added +748.8% | ≤2013 |
| DekaBank Deutsche Girozentrale | 180.0k | 0.34% | $51.6M | unchanged | 2021 Q3 |
| Raymond James Financial INC | 173.7k | 0.33% | $49.8M | added +6.8% | 2013 Q3 |
| Federated Hermes, INC. | 169.3k | 0.32% | $48.5M | added +2.7% | ≤2013 |
| Oberweis Asset Management INC/ | 144.4k | 0.27% | $41.4M | added +23.5% | 2020 Q4 |
| Leeward Investments, LLC - MA | 140.7k | 0.27% | $40.3M | trimmed -3% | 2022 Q1 |
| Natixis Advisors, LLC | 140.5k | 0.27% | $40.3M | trimmed -4.4% | ≤2013 |
| Vontobel Holding LTD. | 138.1k | 0.26% | $39.6M | trimmed -14.4% | 2022 Q1 |
| Grantham, Mayo, Van Otterloo & CO. LLC | 135.6k | 0.26% | $38.9M | added +24.6% | 2025 Q3 |
| Gotham Asset Management | 134.6k | 0.25% | $38.6M | added +19.9% | 2018 Q4 |
| Rhumbline Advisers | 133.7k | 0.25% | $38.3M | added +2.7% | ≤2013 |
| Jane Street | 132.8k | 0.25% | $38.1M | added +1319.4% | 2020 Q2 |
Largest 50 of 607 shown; the full ranked, searchable register is at boothcheck.com/holders/CLH. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.