MPLX LP (MPLX) Institutional Shareholders
MPLX LP (MPLX) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $10.49B in MPLX holdings during the latest filing period.
Alps Advisors Inc is currently the largest disclosed institutional shareholder of MPLX tracked by InsiderSet, reporting ownership valued at approximately $1.61B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.70B, representing an estimated gain of +5.59% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 60% of the total disclosed MPLX value among the investors covered in this analysis. Major shareholders include Alps Advisors Inc, Invesco Ltd., Blackstone Inc., and several other long-term asset managers with concentrated positions in MPLX LP (MPLX).
This page ranks the largest institutional MPLX shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
618
Total Reported Value
$10.49B
Largest Holder
Alps Advisors Inc
Largest Position
$1.61B
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
41
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Alps Advisors Inc | 7.55% | 28,601,592 | $1,611,127,677 | $1,701,222,692 | +$90,095,015 | +5.59% | |
| Invesco Ltd. | 0.08% | 18,273,448 | $1,029,343,326 | $1,086,904,687 | +$57,561,361 | +5.59% | |
| Blackstone Inc. | 2.38% | 12,956,943 | $729,864,599 | $770,678,970 | +$40,814,371 | +5.59% | |
| Goldman Sachs Group Inc | 0.07% | 11,329,340 | $638,181,734 | $673,869,143 | +$35,687,409 | +5.59% | |
| Tortoise Capital Advisors, L.L.C. | 6.01% | 10,500,469 | $591,491,419 | $624,567,896 | +$33,076,477 | +5.59% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.54% | 8,011,582 | $451,292,414 | $476,528,897 | +$25,236,483 | +5.59% | |
| Kayne Anderson Capital Advisors Lp | 6.48% | 5,862,925 | $330,258,565 | $348,726,779 | +$18,468,214 | +5.59% | |
| Energy Income Partners, Llc | 4.77% | 5,380,295 | $303,072,017 | $320,019,947 | +$16,947,930 | +5.59% | |
| Morgan Stanley | 0.02% | 5,275,829 | $297,187,475 | $313,806,309 | +$16,618,834 | +5.59% | |
| Ubs Group Ag | 0.05% | 5,259,274 | $296,254,904 | $312,821,618 | +$16,566,714 | +5.59% | |
| Fmr Llc | 0.01% | 3,920,887 | $220,863,565 | $233,214,359 | +$12,350,794 | +5.59% | |
| Jpmorgan Chase & Co | 0.01% | 3,428,352 | $192,742,001 | $203,918,377 | +$11,176,376 | +5.80% | |
| Brave Warrior Advisors | Glenn Greenberg | 3.90% | 3,180,534 | $179,159,480 | $189,178,162 | +$10,018,682 | +5.59% |
| Cibc Bancorp Usa Inc. | 0.21% | 2,988,109 | $168,320,180 | $177,732,723 | +$9,412,543 | +5.59% | |
| Bank Of Montreal | 0.05% | 2,549,532 | $143,615,139 | $151,646,163 | +$8,031,024 | +5.59% | |
| Clearbridge Investments, Llc | 0.11% | 2,343,689 | $132,020,001 | $139,402,622 | +$7,382,621 | +5.59% | |
| Miller Howard Investments Inc | 3.48% | 2,325,809 | $131,012,807 | $138,339,119 | +$7,326,312 | +5.59% | |
| Westwood Holdings Group Inc | 0.90% | 2,113,845 | $119,072,885 | $125,731,501 | +$6,658,616 | +5.59% | |
| Bank Of America Corp | 0.01% | 2,070,457 | $116,628,844 | $123,150,782 | +$6,521,938 | +5.59% | |
| Fractal Investments Llc | 10.84% | 1,668,116 | $93,964,974 | $99,219,540 | +$5,254,566 | +5.59% | |
| Royal Bank Of Canada | 0.02% | 1,635,550 | $92,130,000 | $97,282,514 | +$5,152,514 | +5.59% | |
| Duff & Phelps Investment Management Co | 0.86% | 1,618,467 | $91,168,246 | $96,266,417 | +$5,098,171 | +5.59% | |
| Alphacore Capital Llc | 1.67% | 1,615,591 | $91,006,222 | $96,095,353 | +$5,089,131 | +5.59% | |
| Cushing Asset Management, Lp Dba Nxg Investment Management | 4.07% | 1,614,600 | $90,950,418 | $96,036,408 | +$5,085,990 | +5.59% | |
| Brookfield Corp | 0.10% | 1,356,028 | $76,385,050 | $80,656,545 | +$4,271,495 | +5.59% | |
| Bnp Paribas Financial Markets | 0.04% | 1,313,107 | $73,967,317 | $78,103,604 | +$4,136,287 | +5.59% | |
| Stifel Financial Corp | 0.06% | 1,306,287 | $73,583,130 | $77,697,951 | +$4,114,821 | +5.59% | |
| Ing Groep Nv | 0.34% | 1,239,600 | $69,826,668 | $73,731,408 | +$3,904,740 | +5.59% | |
| Mariner, Llc | 0.07% | 1,143,271 | $64,391,576 | $68,001,759 | +$3,610,183 | +5.61% | |
| Epoch Investment Partners, Inc. | 0.34% | 1,046,028 | $58,922,757 | $62,217,745 | +$3,294,988 | +5.59% | |
| Progeny 3, Inc. | 2.95% | 1,015,966 | $57,229,365 | $60,429,658 | +$3,200,293 | +5.59% | |
| Barclays Plc | 0.02% | 970,593 | $54,673,504 | $57,730,872 | +$3,057,368 | +5.59% | |
| Infrastructure Capital Advisors, Llc | 4.12% | 936,785 | $52,769,099 | $55,719,972 | +$2,950,873 | +5.59% | |
| Raymond James Financial Inc | 0.01% | 922,179 | $51,946,358 | $54,851,207 | +$2,904,849 | +5.59% | |
| Victory Capital Management Inc | 0.03% | 872,763 | $49,162,740 | $51,911,943 | +$2,749,203 | +5.59% | |
| Wells Fargo & Company/Mn | 0.01% | 863,077 | $48,617,097 | $51,335,820 | +$2,718,723 | +5.59% | |
| Americana Partners, Llc | 1.09% | 856,711 | $48,258,533 | $50,957,170 | +$2,698,637 | +5.59% | |
| Deutsche Bank Ag\ | 0.01% | 853,780 | $48,093,427 | $50,782,834 | +$2,689,407 | +5.59% | |
| Allianz Asset Management Gmbh | 0.05% | 829,136 | $46,705,231 | $49,317,009 | +$2,611,778 | +5.59% | |
| Neuberger Berman Group Llc | 0.03% | 749,837 | $42,238,322 | $44,600,305 | +$2,361,983 | +5.59% | |
| Reaves W H & Co Inc | 0.57% | 670,500 | $37,769,265 | $39,881,340 | +$2,112,075 | +5.59% | |
| Arax Advisory Partners | 0.22% | 596,042 | $33,575,052 | $35,452,578 | +$1,877,526 | +5.59% | |
| U.S. Capital Wealth Advisors, Llc | 0.83% | 577,581 | $32,962,563 | $34,354,518 | +$1,391,955 | +4.22% | |
| Longfellow Investment Management Co Llc | 6.67% | 579,453 | $32,640,587 | $34,465,864 | +$1,825,277 | +5.59% | |
| Mizuho Markets Americas Llc | 0.58% | 575,000 | $32,389,750 | $34,201,000 | +$1,811,250 | +5.59% | |
| Recurrent Investment Advisors Llc | 1.90% | 544,714 | $30,683,740 | $32,399,589 | +$1,715,849 | +5.59% | |
| Appaloosa Management | David Tepper | 0.38% | 502,460 | $28,303,572 | $29,886,321 | +$1,582,749 | +5.59% |
| Chicago Partners Investment Group Llc | 0.56% | 488,733 | $28,107,035 | $29,069,839 | +$962,804 | +3.43% | |
| Neos Investment Management Llc | 0.10% | 486,025 | $27,377,788 | $28,908,767 | +$1,530,979 | +5.59% | |
| Lpl Financial Llc | 0.01% | 470,133 | $26,482,588 | $27,963,511 | +$1,480,923 | +5.59% |
Frequently asked questions about MPLX
Who owns the most MPLX stock?
The largest holders of MPLX are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for MPLX LP (MPLX).
Is MPLX widely held by superinvestors?
Many widely followed stocks like MPLX appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MPLX is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.