Who owns MPLX (MPLX)
Which tracked institutional funds hold MPLX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MPLX company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-02). 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
67 tracked funds added or opened MPLX while 118 trimmed or exited it between 2026-Q1 and 2026-Q2 — 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
MPLX’s largest tracked holder by dollar value, ALPS ADVISORS INC, sizes it at 7.6% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 7.4pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in MPLX 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 2026-Q1 and 2026-Q2, across 543 tracked filers holding MPLX, 255 increased or opened the position and 288 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 MPLX between the 2026-Q1 and 2026-Q2 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 12
- MIZUHO MARKETS AMERICAS LLC$32M
- Recurrent Investment Advisors LLC$31M
- NewEdge Advisors, LLC$5M
- Indivisible Partners$5M
- GROUP ONE TRADING LLC$4M
- Lionhunter Capital Management, LLC$3M
Full exits 55
- CHICKASAW CAPITAL MANAGEMENT LLC$298M
- MILLER HOWARD INVESTMENTS INC /NY$128M
- NEUBERGER BERMAN GROUP LLC$63M
- COHEN & STEERS, INC.$53M
- REAVES W H & CO INC$38M
- U.S. Capital Wealth Advisors, LLC$33M
Largest adds
- ALPS ADVISORS INC$66M
- MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.$34M
- Arax Advisory Partners$33M
- FMR LLC$29M
- ROYAL BANK OF CANADA$26M
- CIBC Bancorp USA Inc.$20M
Largest trims
- TORTOISE CAPITAL ADVISORS, L.L.C.$165M
- Blackstone Inc.$146M
- BANK OF MONTREAL /CAN/$86M
- GOLDMAN SACHS GROUP INC$76M
- KAYNE ANDERSON CAPITAL ADVISORS LP$59M
- Brookfield Corp /ON/$48M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| ALPS ADVISORS INC added | 28,601,592 | $1.6B | 16.3% | 2026-Q2 |
| Invesco Ltd. added | 18,273,448 | $1.0B | 10.4% | 2026-Q2 |
| Blackstone Inc. trimmed | 12,956,943 | $730M | 7.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 11,329,340 | $638M | 6.5% | 2026-Q2 |
| TORTOISE CAPITAL ADVISORS, L.L.C. trimmed | 10,500,469 | $591M | 6.0% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 8,011,582 | $451M | 4.6% | 2026-Q2 |
| KAYNE ANDERSON CAPITAL ADVISORS LP trimmed | 5,862,925 | $330M | 3.3% | 2026-Q2 |
| Energy Income Partners, LLC added | 5,380,295 | $303M | 3.1% | 2026-Q2 |
| MORGAN STANLEY added | 5,275,829 | $297M | 3.0% | 2026-Q2 |
| UBS Group AG added | 5,259,274 | $296M | 3.0% | 2026-Q2 |
| FMR LLC added | 3,920,887 | $221M | 2.2% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 3,428,352 | $193M | 1.9% | 2026-Q2 |
| Brave Warrior Advisors, LLC trimmed | 3,180,534 | $179M | 1.8% | 2026-Q2 |
| CIBC Bancorp USA Inc. added | 2,988,109 | $168M | 1.7% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ trimmed | 2,549,532 | $144M | 1.5% | 2026-Q2 |
| Clearbridge Investments, LLC | 2,343,689 | $132M | 1.3% | 2026-Q2 |
| WESTWOOD HOLDINGS GROUP INC trimmed | 2,113,845 | $119M | 1.2% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 2,070,457 | $117M | 1.2% | 2026-Q2 |
| EAGLE GLOBAL ADVISORS LLC trimmed | 1,793,816 | $101M | 1.0% | 2026-Q2 |
| Fractal Investments LLC trimmed | 1,668,116 | $94M | 1.0% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 1,635,550 | $92M | 0.9% | 2026-Q2 |
| DUFF & PHELPS INVESTMENT MANAGEMENT CO trimmed | 1,618,467 | $91M | 0.9% | 2026-Q2 |
| AlphaCore Capital LLC added | 1,615,591 | $91M | 0.9% | 2026-Q2 |
| CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENT trimmed | 1,614,600 | $91M | 0.9% | 2026-Q2 |
| Brookfield Corp /ON/ trimmed | 1,356,028 | $76M | 0.8% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 1,313,107 | $74M | 0.7% | 2026-Q2 |
| STIFEL FINANCIAL CORP trimmed | 1,306,287 | $74M | 0.7% | 2026-Q2 |
| ING GROEP NV trimmed | 1,239,600 | $70M | 0.7% | 2026-Q2 |
| Mariner, LLC trimmed | 1,143,271 | $64M | 0.7% | 2026-Q2 |
| Epoch Investment Partners, Inc. trimmed | 1,046,028 | $59M | 0.6% | 2026-Q2 |
| Progeny 3, Inc. | 1,015,966 | $57M | 0.6% | 2026-Q2 |
| BARCLAYS PLC added | 970,593 | $55M | 0.6% | 2026-Q2 |
| INFRASTRUCTURE CAPITAL ADVISORS, LLC trimmed | 936,785 | $53M | 0.5% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 922,179 | $52M | 0.5% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 872,763 | $49M | 0.5% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 863,077 | $49M | 0.5% | 2026-Q2 |
| Americana Partners, LLC added | 856,711 | $48M | 0.5% | 2026-Q2 |
| DEUTSCHE BANK AG\ | 853,780 | $48M | 0.5% | 2026-Q2 |
| Allianz Asset Management GmbH | 829,136 | $47M | 0.5% | 2026-Q2 |
| Arax Advisory Partners added | 596,042 | $34M | 0.3% | 2026-Q2 |
| LONGFELLOW INVESTMENT MANAGEMENT CO LLC | 579,453 | $33M | 0.3% | 2026-Q2 |
| MIZUHO MARKETS AMERICAS LLC added | 575,000 | $32M | 0.3% | 2026-Q2 |
| Recurrent Investment Advisors LLC new | 544,714 | $31M | 0.3% | 2026-Q2 |
| Appaloosa LP | 502,460 | $28M | 0.3% | 2026-Q2 |
| Chicago Partners Investment Group LLC added | 488,733 | $28M | 0.3% | 2026-Q2 |
| NEOS Investment Management LLC added | 486,025 | $27M | 0.3% | 2026-Q2 |
| LPL Financial LLC trimmed | 470,133 | $26M | 0.3% | 2026-Q2 |
| JENNISON ASSOCIATES LLC trimmed | 441,796 | $25M | 0.3% | 2026-Q2 |
| Oxbow Advisors, LLC added | 440,557 | $25M | 0.3% | 2026-Q2 |
| Sovereign Investment Advisors, LLC | 373,955 | $21M | 0.2% | 2026-Q2 |
| EXCHANGE TRADED CONCEPTS, LLC trimmed | 368,974 | $21M | 0.2% | 2026-Q2 |
| Northside Capital Management, LLC added | 362,982 | $20M | 0.2% | 2026-Q2 |
| Maryland State Retirement & Pension System added | 355,372 | $20M | 0.2% | 2026-Q2 |
| Corient Private Wealth LP added | 349,268 | $20M | 0.2% | 2026-Q2 |
| Texas Yale Capital Corp. added | 344,263 | $19M | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 341,636 | $19M | 0.2% | 2026-Q2 |
| Heronetta Management, L.P. | 324,039 | $18M | 0.2% | 2026-Q2 |
| Catalyst Capital Advisors LLC added | 322,143 | $18M | 0.2% | 2026-Q2 |
| TECTONIC ADVISORS LLC added | 278,156 | $16M | 0.2% | 2026-Q2 |
| CITIGROUP INC added | 275,873 | $16M | 0.2% | 2026-Q2 |
| WALNUT PRIVATE EQUITY PARTNERS, LLC added | 268,000 | $16M | 0.2% | 2026-Q2 |
| TrueMark Investments, LLC added | 266,413 | $15M | 0.2% | 2026-Q2 |
| OPAL CAPITAL LLC added | 266,131 | $15M | 0.2% | 2026-Q2 |
| Private Capital Advisors, Inc. added | 260,486 | $15M | 0.1% | 2026-Q2 |
| Rockefeller Capital Management L.P. added | 258,931 | $15M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC added | 255,507 | $14M | 0.1% | 2026-Q2 |
| Waverly Advisors, LLC trimmed | 239,612 | $13M | 0.1% | 2026-Q2 |
| Adams Asset Advisors, LLC added | 221,452 | $12M | 0.1% | 2026-Q2 |
| &PARTNERS trimmed | 219,845 | $12M | 0.1% | 2026-Q2 |
| RR Advisors, LLC | 214,194 | $12M | 0.1% | 2026-Q2 |
| STEPHENS INC /AR/ added | 211,656 | $12M | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 209,147 | $12M | 0.1% | 2026-Q2 |
| Sequoia Financial Advisors, LLC added | 203,936 | $11M | 0.1% | 2026-Q2 |
| Cetera Investment Advisers trimmed | 194,602 | $11M | 0.1% | 2026-Q2 |
| UNITED CAPITAL FINANCIAL ADVISORS, LLC trimmed | 187,586 | $11M | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 186,814 | $11M | 0.1% | 2026-Q2 |
| AVENIR CORP trimmed | 185,366 | $10M | 0.1% | 2026-Q2 |
| EVERGREEN CAPITAL MANAGEMENT LLC trimmed | 176,959 | $10M | 0.1% | 2026-Q2 |
| Advisors Asset Management, Inc. added | 168,520 | $9M | 0.1% | 2026-Q2 |
| Empowered Funds, LLC trimmed | 164,540 | $9M | 0.1% | 2026-Q2 |
| Empirical Finance, LLC trimmed | 164,540 | $9M | 0.1% | 2026-Q2 |
| HENNESSY ADVISORS INC | 162,519 | $9M | 0.1% | 2026-Q2 |
| Advisors Capital Management, LLC added | 157,815 | $9M | 0.1% | 2026-Q2 |
| Blueprint Financial Advisors LLC added | 156,970 | $9M | 0.1% | 2026-Q2 |
| Blueprint Investment Partners LLC added | 156,970 | $9M | 0.1% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC trimmed | 155,979 | $9M | 0.1% | 2026-Q2 |
| Gilman Hill Asset Management, LLC trimmed | 154,120 | $9M | 0.1% | 2026-Q2 |
| GLENMEDE TRUST CO NA trimmed | 152,650 | $9M | 0.1% | 2026-Q2 |
| Evercore Wealth Management, LLC added | 152,053 | $9M | 0.1% | 2026-Q2 |
| Turtle Creek Wealth Advisors, LLC added | 150,386 | $8M | 0.1% | 2026-Q2 |
| Kestra Advisory Services, LLC added | 144,371 | $8M | 0.1% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 141,244 | $8M | 0.1% | 2026-Q2 |
| BlackRock, Inc. trimmed | 140,175 | $8M | 0.1% | 2026-Q2 |
| Kercheville Advisors, LLC added | 137,657 | $8M | 0.1% | 2026-Q2 |
| COMMONWEALTH EQUITY SERVICES, LLC trimmed | 131,765 | $7M | 0.1% | 2026-Q2 |
| Cresset Asset Management, LLC trimmed | 129,257 | $7M | 0.1% | 2026-Q2 |
| PNC Financial Services Group, Inc. added | 118,990 | $7M | 0.1% | 2026-Q2 |
| BRIDGES INVESTMENT MANAGEMENT INC added | 115,164 | $6M | 0.1% | 2026-Q2 |
| Jump Financial, LLC trimmed | 114,000 | $6M | 0.1% | 2026-Q2 |
| OSAIC HOLDINGS, INC. trimmed | 111,519 | $6M | 0.1% | 2026-Q2 |
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.