Who owns MP (MP)
Which tracked institutional funds hold MP, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MP 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
138 tracked funds added or opened MP while 145 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
MP’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes MP more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in MP 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 711 tracked filers holding MP, 404 increased or opened the position and 305 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 MP 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 46
- VANGUARD CAPITAL MANAGEMENT LLC$332M
- VANGUARD PORTFOLIO MANAGEMENT LLC$327M
- VANGUARD FIDUCIARY TRUST CO$41M
- Goodlander Investment Management, LLC$32M
- Aquatic Capital Management LLC$14M
- LORD, ABBETT & CO. LLC$11M
Full exits 45
- VANGUARD GROUP INC$721M
- NORGES BANK$83M
- Connor, Clark & Lunn Investment Management Ltd.$22M
- TWO SIGMA ADVISERS, LP$19M
- WELLINGTON MANAGEMENT GROUP LLP$9M
- Ratan Capital Management LP$7M
Largest adds
- D. E. Shaw & Co., Inc.$122M
- MORGAN STANLEY$107M
- UBS Group AG$83M
- VAN ECK ASSOCIATES CORP$78M
- TWO SIGMA INVESTMENTS, LP$31M
- BNP PARIBAS ASSET MANAGEMENT Holding S.A.$28M
Largest trims
- CITADEL ADVISORS LLC$151M
- BlackRock, Inc.$111M
- Squarepoint Ops LLC$80M
- SUSQUEHANNA INTERNATIONAL GROUP, LLP$69M
- VOLORIDGE INVESTMENT MANAGEMENT, LLC$56M
- Hancock Prospecting Pty Ltd$34M
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 |
|---|---|---|---|---|
| Hancock Prospecting Pty Ltd | 14,861,212 | $717M | 10.7% | 2026-Q1 |
| BlackRock, Inc. trimmed | 11,807,961 | $570M | 8.5% | 2026-Q1 |
| STATE STREET CORP added | 7,397,227 | $357M | 5.3% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 6,873,709 | $332M | 5.0% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 6,770,141 | $327M | 4.9% | 2026-Q1 |
| MORGAN STANLEY added | 5,552,307 | $268M | 4.0% | 2026-Q1 |
| VAN ECK ASSOCIATES CORP added | 4,588,527 | $221M | 3.3% | 2026-Q1 |
| UBS Group AG added | 3,474,972 | $168M | 2.5% | 2026-Q1 |
| Invesco Ltd. added | 3,455,053 | $167M | 2.5% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 3,149,152 | $152M | 2.3% | 2026-Q1 |
| COOPERMAN LEON G | 3,000,000 | $145M | 2.2% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 2,919,294 | $133M | 2.0% | 2026-Q1 |
| REAVES W H & CO INC trimmed | 2,608,770 | $126M | 1.9% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 2,519,805 | $122M | 1.8% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 2,013,795 | $97M | 1.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,872,351 | $90M | 1.4% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 1,508,573 | $73M | 1.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,393,457 | $67M | 1.0% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 1,338,096 | $65M | 1.0% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 1,196,059 | $58M | 0.9% | 2026-Q1 |
| NORTHERN TRUST CORP added | 1,110,049 | $54M | 0.8% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 919,083 | $44M | 0.7% | 2026-Q1 |
| FMR LLC trimmed | 868,336 | $42M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 858,493 | $41M | 0.6% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 852,620 | $41M | 0.6% | 2026-Q1 |
| VOYA INVESTMENT MANAGEMENT LLC added | 834,131 | $40M | 0.6% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ added | 796,250 | $38M | 0.6% | 2026-Q1 |
| Driehaus Capital Management LLC added | 779,468 | $38M | 0.6% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 702,290 | $35M | 0.5% | 2026-Q1 |
| Goodlander Investment Management, LLC added | 670,000 | $32M | 0.5% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 623,231 | $30M | 0.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 581,262 | $28M | 0.4% | 2026-Q1 |
| CITIGROUP INC trimmed | 568,593 | $27M | 0.4% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 556,252 | $27M | 0.4% | 2026-Q1 |
| Rokos Capital Management LLP | 550,206 | $27M | 0.4% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 527,578 | $25M | 0.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 518,153 | $25M | 0.4% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 518,108 | $25M | 0.4% | 2026-Q1 |
| FRED ALGER MANAGEMENT, LLC added | 498,037 | $24M | 0.4% | 2026-Q1 |
| BAILLIE GIFFORD & CO trimmed | 453,871 | $22M | 0.3% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 444,831 | $21M | 0.3% | 2026-Q1 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main added | 416,376 | $20M | 0.3% | 2026-Q1 |
| Banque Transatlantique SA added | 414,013 | $20M | 0.3% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 410,814 | $20M | 0.3% | 2026-Q1 |
| Amundi added | 385,001 | $19M | 0.3% | 2026-Q1 |
| ALPS ADVISORS INC added | 381,262 | $18M | 0.3% | 2026-Q1 |
| LPL Financial LLC added | 380,006 | $18M | 0.3% | 2026-Q1 |
| Nuveen, LLC added | 370,006 | $18M | 0.3% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 367,942 | $18M | 0.3% | 2026-Q1 |
| PINNACLE ASSOCIATES LTD added | 355,327 | $17M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 346,170 | $17M | 0.2% | 2026-Q1 |
| SEGALL BRYANT & HAMILL, LLC trimmed | 344,234 | $17M | 0.2% | 2026-Q1 |
| STIFEL FINANCIAL CORP added | 338,991 | $16M | 0.2% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 314,696 | $15M | 0.2% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 299,950 | $14M | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 297,114 | $14M | 0.2% | 2026-Q1 |
| Aquatic Capital Management LLC added | 292,911 | $14M | 0.2% | 2026-Q1 |
| NAN FUNG TRINITY (HK) LTD | 283,050 | $14M | 0.2% | 2026-Q1 |
| Swiss National Bank added | 280,400 | $14M | 0.2% | 2026-Q1 |
| Woodline Partners LP added | 278,894 | $13M | 0.2% | 2026-Q1 |
| Gotham Asset Management, LLC trimmed | 277,896 | $13M | 0.2% | 2026-Q1 |
| Daiwa Securities Group Inc. added | 277,693 | $13M | 0.2% | 2026-Q1 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 273,495 | $13M | 0.2% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 267,450 | $13M | 0.2% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 257,413 | $12M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System added | 256,959 | $12M | 0.2% | 2026-Q1 |
| FEDERATED HERMES, INC. added | 256,634 | $12M | 0.2% | 2026-Q1 |
| Cetera Investment Advisers trimmed | 253,938 | $12M | 0.2% | 2026-Q1 |
| Point72 Asset Management, L.P. added | 253,300 | $12M | 0.2% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 248,447 | $12M | 0.2% | 2026-Q1 |
| LORD, ABBETT & CO. LLC new | 227,132 | $11M | 0.2% | 2026-Q1 |
| Private Advisory Group LLC added | 224,688 | $11M | 0.2% | 2026-Q1 |
| Polar Capital Holdings Plc added | 221,800 | $11M | 0.2% | 2026-Q1 |
| BANK OF NOVA SCOTIA trimmed | 220,597 | $11M | 0.2% | 2026-Q1 |
| SG Americas Securities, LLC added | 218,200 | $11M | 0.2% | 2026-Q1 |
| PEAK6 LLC added | 210,191 | $10M | 0.2% | 2026-Q1 |
| BARCLAYS PLC trimmed | 196,570 | $9M | 0.1% | 2026-Q1 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO added | 192,397 | $9M | 0.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 185,397 | $9M | 0.1% | 2026-Q1 |
| Rheos Capital Works Inc. | 185,000 | $9M | 0.1% | 2026-Q1 |
| Caption Management, LLC added | 181,660 | $9M | 0.1% | 2026-Q1 |
| Bernzott Capital Advisors added | 174,782 | $8M | 0.1% | 2026-Q1 |
| CAPITAL FUND MANAGEMENT S.A. trimmed | 173,529 | $8M | 0.1% | 2026-Q1 |
| Tidal Investments LLC added | 172,424 | $8M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 14,265,058 | $721M | 10.8% | 2025-Q4 stale |
| RENAISSANCE TECHNOLOGIES LLC added | 1,404,600 | $94M | 1.4% | 2025-Q3 stale |
| NORGES BANK added | 1,633,636 | $83M | 1.2% | 2025-Q4 stale |
| Walleye Trading LLC added | 2,432,675 | $81M | 1.2% | 2025-Q2 stale |
| QVT Financial LP trimmed | 1,304,171 | $32M | 0.5% | 2025-Q1 stale |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 427,677 | $22M | 0.3% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 378,300 | $19M | 0.3% | 2025-Q4 stale |
| Alyeska Investment Group, L.P. added | 503,939 | $17M | 0.3% | 2025-Q2 stale |
| EXCHANGE TRADED CONCEPTS, LLC added | 241,024 | $16M | 0.2% | 2025-Q3 stale |
| Philadelphia Financial Management of San Francisco, LLC trimmed | 223,062 | $15M | 0.2% | 2025-Q3 stale |
| PUBLIC SECTOR PENSION INVESTMENT BOARD added | 412,355 | $14M | 0.2% | 2025-Q2 stale |
| SEVEN GRAND MANAGERS, LLC new | 200,000 | $13M | 0.2% | 2025-Q3 stale |
| ExodusPoint Capital Management, LP added | 154,663 | $10M | 0.2% | 2025-Q3 stale |
| Burkehill Global Management, LP new | 150,000 | $10M | 0.2% | 2025-Q3 stale |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 175,930 | $9M | 0.1% | 2025-Q4 stale |
| Revere Asset Management, Inc new | 127,619 | $9M | 0.1% | 2025-Q3 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.