Who owns MPLX?
Institutional ownership of MPLX LP from Form 13F, Q2 2026
638 institutional managers reported holding MPLX LP (MPLX) in Form 13F filings for Q2 2026, with 196,336,402 shares worth $11.1B. The largest reported holder was Alps Advisors Inc. Managers that filed both quarters cut a net 5,728,290 shares (-2.8%). 52 opened new positions and 59 sold out.
- Funds holding
- 638
- Value held
- $11.1B
- New / sold out
- 52 / 59
- Net shares, same filers
- -2.8%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of MPLX
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| Alps Advisors Inc | $1.6B | 14.6% | 28,601,592 | Added |
| Invesco Ltd. | $1.0B | 9.3% | 18,273,448 | Unchanged |
| Blackstone Inc. | $730M | 6.6% | 12,956,943 | Trimmed |
| Goldman Sachs Group Inc | $638M | 5.8% | 11,329,340 | Trimmed |
| Tortoise Capital Advisors, L.l.c. | $591M | 5.3% | 10,500,469 | Trimmed |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $451M | 4.1% | 8,011,582 | Added |
| Kayne Anderson Capital Advisors LP | $330M | 3.0% | 5,862,925 | Trimmed |
| Energy Income Partners, LLC | $303M | 2.7% | 5,380,295 | Added |
| Morgan Stanley | $297M | 2.7% | 5,275,829 | Added |
| UBS Group AG | $296M | 2.7% | 5,259,274 | Added |
| Chickasaw Capital Management LLC | $294M | 2.7% | 5,211,734 | Trimmed |
| FMR LLC | $221M | 2.0% | 3,920,887 | Added |
| JPMorgan Chase & Co | $193M | 1.7% | 3,428,352 | Trimmed |
| Brave Warrior Advisors, LLC | $179M | 1.6% | 3,180,534 | Trimmed |
| CIBC Bancorp USA Inc. | $168M | 1.5% | 2,988,109 | Added |
| Bank of Montreal | $144M | 1.3% | 2,549,532 | Trimmed |
| Clearbridge Investments, LLC | $132M | 1.2% | 2,343,689 | Unchanged |
| Miller Howard Investments Inc | $131M | 1.2% | 2,325,809 | Added |
| Westwood Holdings Group Inc | $119M | 1.1% | 2,113,845 | Trimmed |
| Bank of America Corp | $117M | 1.1% | 2,070,457 | Trimmed |
| Eagle Global Advisors LLC | $101M | 0.9% | 1,793,816 | Trimmed |
| Fractal Investments LLC | $94.0M | 0.8% | 1,668,116 | Trimmed |
| Royal Bank of Canada | $92.1M | 0.8% | 1,635,550 | Added |
| Duff & Phelps Investment Management Co | $91.2M | 0.8% | 1,618,467 | Trimmed |
| AlphaCore Capital LLC | $91.0M | 0.8% | 1,615,591 | Unchanged |
Share of 13F holdings is each fund's shares as a share of the 196,336,402 MPLX shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- Alps Advisors Inc Added+$86.2M
- HRT Financial LP Added+$42.1M
- MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Added+$39.0M
- Arax Advisory Partners Added+$33.5M
- Mizuho Markets Americas LLC New+$32.4M
- FMR LLC Added+$31.5M
- Recurrent Investment Advisors LLC New+$30.7M
- Royal Bank of Canada Added+$27.2M
- CIBC Bancorp USA Inc. Added+$19.5M
- Morgan Stanley Added+$17.6M
Biggest sellers in Q2 2026
- Tortoise Capital Advisors, L.l.c. Trimmed-$155M
- Blackstone Inc. Trimmed-$135M
- Bank of Montreal Trimmed-$83.2M
- Goldman Sachs Group Inc Trimmed-$66.4M
- Kayne Anderson Capital Advisors LP Trimmed-$54.3M
- Brookfield Corp Trimmed-$46.1M
- JPMorgan Chase & Co Trimmed-$39.7M
- Ing Groep NV Trimmed-$29.8M
- Bank of America Corp Trimmed-$28.3M
- Fractal Investments LLC Trimmed-$21.6M
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $533M and sold $856M; 228 added and 147 trimmed.
Questions about MPLX ownership
- Who owns MPLX stock?
- 638 institutional investment managers reported MPLX positions in their Form 13F filings for Q2 2026, holding 196,336,402 shares worth $11.1B in total. Alps Advisors Inc reported the largest position.
- Are funds buying or selling MPLX?
- In Q2 2026, 52 managers opened new MPLX positions, 228 added, 147 trimmed and 59 sold out. Managers that filed in both quarters sold a net 5,728,290 shares.
- How current is this MPLX institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to MPLX by CUSIP. Options are left out. MPLX news and filings · MPLX insider trades · Top funds