Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
219 institutional managers reported holding CLDX for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 60%. 53 opened new positions; 17 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Wellington Management | 8.56M | 12.86% | $271.4M | added +6% | 2020 Q4 |
| Kynam Capital Management, LP (focused) | 5.84M | 8.77% | $185.2M | trimmed -1.7% | 2021 Q4 |
| BlackRock | 5.37M | 8.07% | $170.3M | trimmed -1.5% | ≤2013 |
| Vanguard Group | 4.10M | 6.16% | $130.0M | added +1.8% | ≤2013 |
| FMR (Fidelity) | 3.75M | 5.63% | $118.9M | trimmed -23.6% | 2020 Q3 |
| Point72 | 3.23M | 4.85% | $102.4M | added +83.7% | 2021 Q1 |
| State Street | 2.80M | 4.21% | $88.9M | trimmed -17.5% | 2020 Q3 |
| Commodore Capital LP (focused) | 2.70M | 4.05% | $85.5M | added +5.1% | 2020 Q4 |
| T. Rowe Price | 2.09M | 3.13% | $66.1M | added +2.3% | 2020 Q4 |
| Eversept Partners, LP | 1.79M | 2.69% | $56.7M | added +24.6% | 2021 Q4 |
| Geode Capital | 1.69M | 2.54% | $53.5M | added +3.7% | ≤2013 |
| Braidwell LP | 1.36M | 2.04% | $43.0M | trimmed -27% | 2025 Q3 |
| Deep Track Capital, LP | 1.28M | 1.93% | $40.7M | trimmed -32.4% | 2024 Q4 |
| Millennium Management | 1.25M | 1.88% | $39.7M | added +3.4% | 2021 Q4 |
| Vestal Point Capital, LP | 1.22M | 1.84% | $38.8M | added +5.1% | 2024 Q4 |
| Bellevue Group AG | 1.20M | 1.80% | $38.0M | trimmed -66.8% | 2022 Q2 |
| Novo Holdings A/S (focused) | 1.20M | 1.80% | $38.0M | unchanged | 2024 Q2 |
| Dimensional Fund Advisors | 1.06M | 1.59% | $33.6M | added +62.6% | 2025 Q2 |
| Eventide Asset Management, LLC | 1.04M | 1.56% | $32.9M | trimmed -36.9% | 2020 Q2 |
| Fisher Investments | 1.01M | 1.52% | $32.1M | added +8.2% | 2022 Q3 |
| Goldman Sachs | 988.4k | 1.49% | $31.3M | trimmed -7.5% | 2020 Q3 |
| Pictet Asset Management Holding SA | 923.7k | 1.39% | $29.3M | trimmed -4.6% | 2023 Q1 |
| Elmind Capital, LP (focused) | 865.0k | 1.30% | $27.4M | unchanged | 2025 Q4 |
| American Century Companies INC | 856.3k | 1.29% | $27.1M | unchanged | 2021 Q4 |
| Bank OF America CORP /DE/ | 708.6k | 1.06% | $22.5M | added +70.8% | ≤2013 |
| Baker Bros. Advisors LP | 665.4k | 1.00% | $21.1M | unchanged | 2023 Q4 |
| Rock Springs Capital Management LP | 650.3k | 0.98% | $20.6M | trimmed -6.1% | 2022 Q1 |
| Northern Trust | 577.3k | 0.87% | $18.3M | added +5% | ≤2013 |
| Charles Schwab Investment Management | 545.5k | 0.82% | $17.3M | trimmed -1% | 2020 Q3 |
| Woodline Partners LP | 500.1k | 0.75% | $15.9M | unchanged | 2023 Q1 |
| Affinity Asset Advisors, LLC | 500.0k | 0.75% | $15.9M | added +42.9% | 2025 Q3 |
| 5AM Venture Management, LLC (focused) | 497.3k | 0.75% | $15.8M | unchanged | 2023 Q2 |
| Ikarian Capital, LLC | 461.2k | 0.69% | $14.6M | opened | 2026 Q1 |
| Logos Global Management LP | 450.0k | 0.68% | $14.3M | added +28.6% | 2025 Q2 |
| Adar1 Capital Management, LLC | 427.8k | 0.64% | $13.6M | trimmed -33.9% | 2024 Q2 |
| UBS | 417.8k | 0.63% | $13.2M | trimmed -5.9% | ≤2013 |
| Kennedy Capital Management LLC | 352.3k | 0.53% | $11.2M | opened | 2026 Q1 |
| Rosalind Advisors, INC. (focused) | 330.0k | 0.50% | $10.5M | opened | 2026 Q1 |
| PFM Health Sciences, LP | 325.0k | 0.49% | $10.3M | added +144% | 2025 Q4 |
| Foresite Capital Management VI LLC (focused) | 315.9k | 0.47% | $10.0M | opened | 2026 Q1 |
| Tetragon Partners GP LTD (focused) | 312.3k | 0.47% | $9.9M | added +28.1% | 2024 Q4 |
| BNP Paribas Financial Markets | 298.2k | 0.45% | $9.5M | trimmed -15.7% | ≤2013 |
| Palo Alto Investors LP | 296.4k | 0.45% | $9.4M | opened | 2026 Q1 |
| Candriam S.c.a. | 278.9k | 0.42% | $8.8M | opened | 2026 Q1 |
| Segall Bryant & Hamill, LLC | 266.7k | 0.40% | $8.5M | trimmed -48.2% | 2025 Q2 |
| Redmile Group, LLC (focused) | 261.5k | 0.39% | $8.3M | trimmed -7.7% | 2020 Q2 |
| Stempoint Capital LP | 254.3k | 0.38% | $8.1M | opened | 2026 Q1 |
| Sphera Funds Management LTD. | 243.6k | 0.37% | $7.7M | added +1.6% | 2023 Q2 |
| SummitTX Capital, L.p. | 236.6k | 0.35% | $7.5M | added +446.2% | 2025 Q1 |
| Morgan Stanley | 217.5k | 0.33% | $6.9M | trimmed -23.8% | ≤2013 |
Largest 50 of 219 shown; the full ranked, searchable register is at boothcheck.com/holders/CLDX. 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.