Who owns MRVI (MRVI)
Which tracked institutional funds hold MRVI, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MRVI company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
15 tracked funds added or opened MRVI while 39 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
MRVI’s largest tracked holder by dollar value, GTCR LLC, sizes it at 1.5% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.5pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MRVI divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 158 tracked filers holding MRVI, 80 increased or opened the position and 82 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in MRVI between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 6
- VANGUARD CAPITAL MANAGEMENT LLC$15M
- VANGUARD PORTFOLIO MANAGEMENT LLC$3M
- VANGUARD FIDUCIARY TRUST CO$2M
- TUDOR INVESTMENT CORP ET AL$1M
- Capricorn Fund Managers Ltd$961K
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$528K
Full exits 8
- VANGUARD GROUP INC$23M
- WELLINGTON MANAGEMENT GROUP LLP$8M
- MIRABELLA FINANCIAL SERVICES LLP$7M
- TWO SIGMA ADVISERS, LP$3M
- Eversept Partners, LP$2M
- Hudson Bay Capital Management LP$1M
Largest adds
- CITADEL ADVISORS LLC$2M
- BRAIDWELL LP$2M
- TWO SIGMA INVESTMENTS, LP$2M
- First Eagle Investment Management, LLC$1M
- DIMENSIONAL FUND ADVISORS LP$1M
- JACOBS LEVY EQUITY MANAGEMENT, INC$775K
Largest trims
- GTCR LLC$8M
- 12 West Capital Management LP$8M
- BlackRock, Inc.$4M
- Philosophy Capital Management LLC$3M
- MACKENZIE FINANCIAL CORP$2M
- UBS Group AG$2M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| GTCR LLC | 20,150,005 | $57M | 13.8% | 2026-Q1 |
| BRAIDWELL LP added | 10,240,164 | $29M | 7.0% | 2026-Q1 |
| BlackRock, Inc. trimmed | 9,345,268 | $26M | 6.4% | 2026-Q1 |
| 12 West Capital Management LP trimmed | 7,260,195 | $21M | 5.0% | 2026-Q1 |
| MACKENZIE FINANCIAL CORP added | 6,306,425 | $18M | 4.3% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 5,449,702 | $15M | 3.7% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 4,264,689 | $12M | 2.9% | 2026-Q1 |
| Tejara Capital Ltd added | 3,495,187 | $10M | 2.4% | 2026-Q1 |
| Monaco Asset Management SAM trimmed | 3,421,020 | $10M | 2.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 3,319,325 | $9M | 2.3% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 3,205,496 | $9M | 2.2% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 2,828,595 | $8M | 1.9% | 2026-Q1 |
| Philosophy Capital Management LLC trimmed | 2,637,117 | $7M | 1.8% | 2026-Q1 |
| First Eagle Investment Management, LLC added | 2,524,336 | $7M | 1.7% | 2026-Q1 |
| STATE STREET CORP added | 2,428,717 | $7M | 1.7% | 2026-Q1 |
| MARSHALL WACE, LLP added | 2,062,028 | $6M | 1.4% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 2,020,329 | $6M | 1.4% | 2026-Q1 |
| ROYCE & ASSOCIATES LP added | 1,808,448 | $5M | 1.2% | 2026-Q1 |
| GENERAL AMERICAN INVESTORS CO INC added | 1,716,193 | $5M | 1.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 1,649,490 | $5M | 1.1% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 1,636,145 | $5M | 1.1% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 1,579,840 | $4M | 1.1% | 2026-Q1 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP trimmed | 1,484,539 | $4M | 1.0% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 1,484,319 | $4M | 1.0% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 1,418,597 | $4M | 1.0% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,110,914 | $3M | 0.8% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. added | 1,000,000 | $3M | 0.7% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 993,348 | $3M | 0.7% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 952,838 | $3M | 0.7% | 2026-Q1 |
| First Pacific Advisors, LP | 884,883 | $3M | 0.6% | 2026-Q1 |
| DEUTSCHE BANK AG\ added | 858,255 | $2M | 0.6% | 2026-Q1 |
| LAZARD ASSET MANAGEMENT LLC trimmed | 847,799 | $2M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 774,576 | $2M | 0.5% | 2026-Q1 |
| Brummer Multi-Strategy AB added | 759,743 | $2M | 0.5% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 582,211 | $2M | 0.4% | 2026-Q1 |
| CITIGROUP INC trimmed | 484,236 | $1M | 0.3% | 2026-Q1 |
| Cerity Partners LLC added | 469,341 | $1M | 0.3% | 2026-Q1 |
| JACOBS LEVY EQUITY MANAGEMENT, INC added | 458,901 | $1M | 0.3% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 396,915 | $1M | 0.3% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 357,260 | $1M | 0.2% | 2026-Q1 |
| Symmetry Investments LP added | 359,561 | $1M | 0.2% | 2026-Q1 |
| Invesco Ltd. added | 351,558 | $995K | 0.2% | 2026-Q1 |
| Bank of New York Mellon Corp added | 343,643 | $973K | 0.2% | 2026-Q1 |
| Capricorn Fund Managers Ltd new | 339,727 | $961K | 0.2% | 2026-Q1 |
| Delta Investment Management, LLC trimmed | 307,371 | $870K | 0.2% | 2026-Q1 |
| Creative Planning added | 285,869 | $809K | 0.2% | 2026-Q1 |
| Quinn Opportunity Partners LLC | 265,070 | $750K | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 230,147 | $651K | 0.2% | 2026-Q1 |
| Susquehanna Portfolio Strategies, LLC trimmed | 228,733 | $647K | 0.2% | 2026-Q1 |
| PenderFund Capital Management Ltd. trimmed | 205,000 | $580K | 0.1% | 2026-Q1 |
| UBS Group AG trimmed | 191,798 | $543K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 186,639 | $528K | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 159,101 | $517K | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 173,445 | $491K | 0.1% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP added | 168,551 | $477K | 0.1% | 2026-Q1 |
| STRS OHIO | 164,300 | $465K | 0.1% | 2026-Q1 |
| VARCOV Co. new | 161,685 | $458K | 0.1% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 142,635 | $404K | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 140,766 | $399K | 0.1% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 138,743 | $393K | 0.1% | 2026-Q1 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 122,160 | $346K | 0.1% | 2026-Q1 |
| EPACRIA CAPITAL PARTNERS, LLC | 100,078 | $283K | 0.1% | 2026-Q1 |
| Empowered Funds, LLC trimmed | 90,161 | $255K | 0.1% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 85,541 | $242K | 0.1% | 2026-Q1 |
| EntryPoint Capital, LLC added | 85,203 | $241K | 0.1% | 2026-Q1 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO added | 84,178 | $238K | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 7,166,528 | $23M | 5.6% | 2025-Q4 stale |
| WELLINGTON MANAGEMENT GROUP LLP added | 2,360,059 | $8M | 1.9% | 2025-Q4 stale |
| Point72 (DIFC) Ltd trimmed | 2,588,887 | $7M | 1.8% | 2025-Q3 stale |
| MIRABELLA FINANCIAL SERVICES LLP trimmed | 2,110,545 | $7M | 1.7% | 2025-Q4 stale |
| CenterBook Partners LP added | 1,691,873 | $5M | 1.2% | 2025-Q3 stale |
| TWO SIGMA ADVISERS, LP trimmed | 876,700 | $3M | 0.7% | 2025-Q4 stale |
| IMMERSION CORP added | 990,000 | $2M | 0.6% | 2025-Q2 stale |
| Eversept Partners, LP added | 718,582 | $2M | 0.6% | 2025-Q4 stale |
| Parkman Healthcare Partners LLC added | 660,000 | $1M | 0.4% | 2025-Q1 stale |
| Schonfeld Strategic Advisors LLC added | 547,207 | $1M | 0.3% | 2025-Q1 stale |
| Harspring Capital Management, LLC new | 500,000 | $1M | 0.3% | 2025-Q2 stale |
| Wealthquest Corp new | 10,564 | $1M | 0.3% | 2025-Q1 stale |
| Hudson Bay Capital Management LP | 349,663 | $1M | 0.2% | 2025-Q4 stale |
| DARK FOREST CAPITAL MANAGEMENT LP added | 423,477 | $936K | 0.2% | 2025-Q1 stale |
| CIBC Private Wealth Group LLC trimmed | 279,224 | $907K | 0.2% | 2025-Q4 stale |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 316,502 | $699K | 0.2% | 2025-Q1 stale |
| Massar Capital Management, LP | 200,000 | $650K | 0.2% | 2025-Q4 stale |
| Caption Management, LLC added | 272,486 | $602K | 0.1% | 2025-Q1 stale |
| VELA Investment Management, LLC added | 242,962 | $586K | 0.1% | 2025-Q2 stale |
| UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 250,855 | $554K | 0.1% | 2025-Q1 stale |
| Alpine Peaks Capital, LP added | 242,000 | $535K | 0.1% | 2025-Q1 stale |
| Orion Portfolio Solutions, LLC added | 239,357 | $529K | 0.1% | 2025-Q1 stale |
| CAXTON ASSOCIATES LLP new | 150,751 | $490K | 0.1% | 2025-Q4 stale |
| Swiss National Bank | 221,000 | $488K | 0.1% | 2025-Q1 stale |
| TD Asset Management Inc | 145,984 | $474K | 0.1% | 2025-Q4 stale |
| DekaBank Deutsche Girozentrale | 44,000 | $411K | 0.1% | 2025-Q4 stale |
| Yost Capital Management, LP new | 126,056 | $410K | 0.1% | 2025-Q4 stale |
| Squarepoint Ops LLC added | 180,913 | $400K | 0.1% | 2025-Q1 stale |
| Voleon Capital Management LP new | 134,089 | $296K | 0.1% | 2025-Q1 stale |
| READYSTATE ASSET MANAGEMENT LP trimmed | 121,912 | $294K | 0.1% | 2025-Q2 stale |
| ALGERT GLOBAL LLC trimmed | 131,599 | $291K | 0.1% | 2025-Q1 stale |
| Clearline Capital LP trimmed | 118,242 | $285K | 0.1% | 2025-Q2 stale |
| Irenic Capital Management LP added | 80,668 | $262K | 0.1% | 2025-Q4 stale |
| Vident Advisory, LLC added | 110,567 | $244K | 0.1% | 2025-Q1 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.