Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
404 institutional managers reported holding TMDX for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 59%. 58 opened new positions; 62 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 5.29M | 14.63% | $526.1M | trimmed -1.9% | 2019 Q3 |
| FMR (Fidelity) | 5.10M | 14.08% | $506.5M | unchanged | 2019 Q2 |
| Vanguard Group | 3.69M | 10.20% | $366.7M | added +2.3% | 2019 Q2 |
| UBS | 1.52M | 4.20% | $151.1M | trimmed -8.2% | 2019 Q2 |
| State Street | 1.32M | 3.65% | $131.1M | added +3.5% | 2019 Q2 |
| Invesco | 1.04M | 2.87% | $103.2M | added +51.6% | 2021 Q1 |
| Nomura Asset Management International INC. | 885.8k | 2.45% | $88.0M | added +6.4% | 2024 Q4 |
| Goldman Sachs | 866.3k | 2.39% | $86.1M | trimmed -10.3% | 2020 Q1 |
| Geode Capital | 839.2k | 2.32% | $83.4M | added +2.8% | 2019 Q2 |
| Hood River Capital Management LLC | 699.8k | 1.93% | $69.5M | added +1.4% | 2024 Q2 |
| Morgan Stanley | 694.1k | 1.92% | $69.0M | added +4% | 2019 Q2 |
| Eventide Asset Management, LLC | 548.8k | 1.52% | $54.5M | unchanged | 2023 Q2 |
| Dimensional Fund Advisors | 516.7k | 1.43% | $51.3M | added +5.5% | 2024 Q3 |
| Wellington Management | 486.5k | 1.34% | $48.3M | added +12.3% | 2024 Q2 |
| Capital Group (American Funds) | 374.2k | 1.03% | $37.2M | added +64.5% | 2025 Q1 |
| Citigroup INC | 357.4k | 0.99% | $35.5M | added +396.1% | 2019 Q2 |
| T. Rowe Price | 346.7k | 0.96% | $34.5M | trimmed -39.2% | 2021 Q4 |
| Wasatch Advisors LP | 346.1k | 0.96% | $34.4M | added +4.3% | 2024 Q1 |
| Emerald Advisers, LLC | 342.8k | 0.95% | $34.1M | trimmed -2.4% | 2019 Q2 |
| Northern Trust | 338.2k | 0.93% | $33.6M | unchanged | 2019 Q2 |
| Braidwell LP | 329.4k | 0.91% | $32.7M | added +4.5% | 2022 Q4 |
| Two Sigma | 325.1k | 0.90% | $32.3M | trimmed -25.4% | 2024 Q4 |
| Frontier Capital Management CO LLC | 320.5k | 0.89% | $31.8M | added +5.8% | 2024 Q4 |
| Charles Schwab Investment Management | 318.9k | 0.88% | $31.7M | trimmed -1.3% | 2019 Q2 |
| Millennium Management | 306.1k | 0.85% | $30.4M | added +105.4% | 2022 Q2 |
| Baillie Gifford | 305.2k | 0.84% | $30.3M | trimmed -3.6% | 2021 Q1 |
| Bank OF America CORP /DE/ | 295.2k | 0.82% | $29.3M | added +5.7% | 2019 Q2 |
| Zevenbergen Capital Investments LLC | 286.5k | 0.79% | $28.5M | added +2.3% | 2025 Q2 |
| Wells Fargo & COMPANY/MN | 273.8k | 0.76% | $27.2M | added +5.9% | 2019 Q2 |
| Royce & Associates | 244.4k | 0.68% | $24.3M | added +0.5% | 2021 Q4 |
| Principal Financial Group INC | 231.4k | 0.64% | $23.0M | added +19.4% | 2020 Q3 |
| Emerald Mutual Fund Advisers Trust | 229.3k | 0.63% | $22.8M | unchanged | 2019 Q2 |
| Lord, Abbett & CO. LLC | 214.0k | 0.59% | $21.3M | trimmed -1.3% | 2025 Q2 |
| BNY Mellon | 211.4k | 0.58% | $21.0M | trimmed -3.3% | 2019 Q2 |
| Deutsche Bank AG\ | 195.4k | 0.54% | $19.4M | added +18.8% | 2019 Q2 |
| Barclays PLC | 190.6k | 0.53% | $18.9M | trimmed -4.6% | 2019 Q2 |
| Blair William & CO/IL | 174.0k | 0.48% | $17.3M | added +28.1% | 2023 Q3 |
| ArrowMark Colorado Holdings LLC | 171.1k | 0.47% | $17.0M | trimmed -8.5% | 2022 Q3 |
| Candriam S.c.a. | 158.8k | 0.44% | $15.8M | added +45.4% | 2025 Q4 |
| Man Group | 158.4k | 0.44% | $15.7M | added +65.6% | 2024 Q3 |
| Davidson Kempner | 146.4k | 0.40% | $14.5M | unchanged | 2025 Q1 |
| BNP Paribas Financial Markets | 145.1k | 0.40% | $14.4M | trimmed -30.7% | 2019 Q2 |
| Susquehanna International Group | 133.9k | 0.37% | $13.3M | opened | 2020 Q3 |
| FirstWave Capital Management LLC (focused) | 124.3k | 0.34% | $12.3M | added +66.7% | 2025 Q4 |
| Public Sector Pension Investment Board | 122.3k | 0.34% | $12.1M | added +3.4% | 2024 Q3 |
| Envestnet Asset Management INC | 116.5k | 0.32% | $11.6M | added +169.9% | 2019 Q4 |
| ExodusPoint | 115.3k | 0.32% | $11.5M | opened | 2026 Q1 |
| Raymond James Financial INC | 115.0k | 0.32% | $11.4M | added +2.2% | 2022 Q3 |
| Oppenheimer & CO INC | 113.5k | 0.31% | $11.3M | trimmed -2.7% | 2022 Q1 |
| Trexquant Investment LP | 106.3k | 0.29% | $10.6M | added +14.9% | 2025 Q2 |
Largest 50 of 404 shown; the full ranked, searchable register is at boothcheck.com/holders/TMDX. 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.