Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
153 institutional managers reported holding MRVI for the quarter ended Mar 31, 2026. Together they hold about 83% of shares outstanding; the top 10 hold 51%. 23 opened new positions; 30 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Gtcr LLC (focused) | 20.15M | 13.76% | $57.0M | unchanged | 2020 Q4 |
| Braidwell LP | 10.24M | 6.99% | $29.0M | added +22.6% | 2023 Q2 |
| BlackRock | 9.35M | 6.38% | $26.4M | unchanged | 2020 Q4 |
| 12 West Capital Management LP (focused) | 7.26M | 4.96% | $20.5M | trimmed -18.6% | 2023 Q1 |
| Vanguard Group | 7.23M | 4.94% | $20.5M | added +0.9% | 2020 Q4 |
| Mackenzie Financial CORP | 6.31M | 4.31% | $17.8M | added +2.2% | 2022 Q3 |
| Renaissance Technologies | 4.26M | 2.91% | $12.1M | added +0.9% | 2021 Q2 |
| Tejara Capital LTD | 3.50M | 2.39% | $9.9M | added +15.7% | 2025 Q1 |
| Monaco Asset Management SAM | 3.42M | 2.34% | $9.7M | trimmed -1.1% | 2023 Q4 |
| Morgan Stanley | 3.32M | 2.27% | $9.4M | trimmed -3.7% | 2020 Q4 |
| Point72 | 3.21M | 2.19% | $9.1M | added +12.6% | 2020 Q4 |
| Geode Capital | 2.83M | 1.93% | $8.0M | trimmed -0.7% | 2020 Q4 |
| Philosophy Capital Management LLC (focused) | 2.64M | 1.80% | $7.5M | trimmed -14.9% | 2025 Q1 |
| First Eagle Investment Management | 2.52M | 1.72% | $7.1M | added +40.3% | 2025 Q3 |
| State Street | 2.43M | 1.66% | $6.9M | added +0.6% | 2021 Q1 |
| Marshall Wace | 2.08M | 1.42% | $5.9M | added +4.1% | 2020 Q4 |
| Goldman Sachs | 2.02M | 1.38% | $5.7M | unchanged | 2020 Q4 |
| Royce & Associates | 1.81M | 1.24% | $5.1M | added +6% | 2024 Q1 |
| General American Investors CO INC | 1.72M | 1.17% | $4.9M | added +8.3% | 2025 Q3 |
| Millennium Management | 1.65M | 1.13% | $4.7M | trimmed -8.2% | 2020 Q4 |
| Jane Street | 1.64M | 1.12% | $4.6M | added +26.3% | 2020 Q4 |
| Two Sigma | 1.58M | 1.08% | $4.5M | added +86.9% | 2020 Q4 |
| Systematic Financial Management LP | 1.48M | 1.01% | $4.2M | trimmed -2.4% | 2022 Q4 |
| Citadel Advisors | 1.48M | 1.01% | $4.2M | added +140.4% | 2020 Q4 |
| Dimensional Fund Advisors | 1.42M | 0.97% | $4.0M | added +64.8% | 2021 Q3 |
| Northern Trust | 1.11M | 0.76% | $3.1M | added +26.1% | 2021 Q1 |
| T. Rowe Price Investment Management, INC. | 1.00M | 0.68% | $2.8M | added +20.3% | 2025 Q2 |
| Charles Schwab Investment Management | 993.3k | 0.68% | $2.8M | added +0.5% | 2021 Q1 |
| First Manhattan CO. LLC. | 884.9k | 0.60% | $2.5M | unchanged | 2025 Q2 |
| Deutsche Bank AG\ | 858.3k | 0.59% | $2.4M | added +1.3% | 2020 Q4 |
| Lazard Asset Management LLC | 847.8k | 0.58% | $2.4M | trimmed -16.8% | 2020 Q4 |
| Brummer Multi-Strategy AB (focused) | 759.7k | 0.52% | $2.2M | added +66% | 2025 Q4 |
| Bank OF America CORP /DE/ | 582.2k | 0.40% | $1.6M | trimmed -17% | 2020 Q4 |
| Citigroup INC | 484.2k | 0.33% | $1.4M | trimmed -7.2% | 2020 Q4 |
| Cerity Partners LLC | 469.3k | 0.32% | $1.3M | unchanged | 2025 Q4 |
| Jacobs Levy Equity Management, INC | 458.9k | 0.31% | $1.3M | added +184.9% | 2024 Q4 |
| Tudor Investment | 396.9k | 0.27% | $1.1M | opened | 2026 Q1 |
| Symmetry Investments LP | 359.6k | 0.25% | $1.0M | added +38.8% | 2024 Q2 |
| Invesco | 351.6k | 0.24% | $995k | added +1.7% | 2020 Q4 |
| BNY Mellon | 343.6k | 0.23% | $973k | added +2.7% | 2021 Q1 |
| Capricorn Fund Managers LTD | 339.7k | 0.23% | $961k | opened | 2026 Q1 |
| Delta Investment Management, LLC | 307.4k | 0.21% | $870k | trimmed -26% | 2024 Q3 |
| Creative Planning | 285.9k | 0.20% | $809k | added +27.4% | 2022 Q1 |
| Quinn Opportunity Partners LLC | 265.1k | 0.18% | $750k | unchanged | 2023 Q2 |
| Nuveen | 230.1k | 0.16% | $651k | added +0.6% | 2020 Q4 |
| Susquehanna Portfolio Strategies, LLC | 228.7k | 0.16% | $647k | trimmed -3.2% | 2025 Q3 |
| PenderFund Capital Management LTD. | 205.0k | 0.14% | $580k | trimmed -7% | 2024 Q4 |
| UBS | 191.8k | 0.13% | $543k | trimmed -74% | 2020 Q4 |
| Susquehanna International Group | 186.6k | 0.13% | $528k | opened | 2021 Q1 |
| XTX Topco LTD | 173.4k | 0.12% | $491k | added +126.1% | 2023 Q3 |
Largest 50 of 153 shown; the full ranked, searchable register is at boothcheck.com/holders/MRVI. 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.