MPLX · Insider trading · 13F holders · Congress trades
MPLX LP (MPLX)
Who is buying and selling MPLX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 93
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 10
MPLX at a glance
- No open-market insider purchases or sales of MPLX were filed in the last 90 days.
- 93 13F filers hold MPLX among their 50 largest positions, worth $6.0B combined, including Glenn Greenberg and David Tepper. The biggest bets by portfolio weight are Heronetta Management, L.P. (16.8%), Fractal Investments LLC (10.6%) and Chickasaw Capital Management LLC (10.5%). In their latest 13Fs, 1 manager opened a new position and 15 added to one.
- Members of Congress have disclosed 52 MPLX trades since 2015, 6 purchases and 4 sales in the past year; the latest was Mark E. Green (R-TN), selling $500K–1M on Dec 21, 2021.
- MPLX last closed at $60.50 on Oct 30, 2026.
MPLX insider trading
No open-market insider purchases or sales of MPLX were filed in the last 90 days.
Who owns MPLX? Hedge funds and superinvestors
93 13F filers hold MPLX among their 50 largest positions, worth $6.0B combined, including Glenn Greenberg and David Tepper. The biggest bets by portfolio weight are Heronetta Management, L.P. (16.8%), Fractal Investments LLC (10.6%) and Chickasaw Capital Management LLC (10.5%). In their latest 13Fs, 1 manager opened a new position and 15 added to one.
Superinvestors holding MPLX: Glenn Greenberg 3.9% · David Tepper 0.4%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Alps Advisors IncMutual fund manager | 7.6% | $1.6B | 28,601,592 | +5.7% shares | Q2 2026 |
| Blackstone Inc.Investment manager | 2.4% | $729.9M | 12,956,943 | -15.6% shares | Q2 2026 |
| Tortoise Capital Advisors, L.l.c.Mutual fund manager | 6.0% | $591.5M | 10,500,469 | -20.8% shares | Q2 2026 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.Investment manager | 0.5% | $451.3M | 8,011,582 | +9.5% shares | Q2 2026 |
| Kayne Anderson Capital Advisors LPHedge fund | 6.5% | $330.3M | 5,862,925 | -14.1% shares | Q2 2026 |
| Energy Income Partners, LLCMutual fund manager | 4.8% | $303.1M | 5,380,295 | +4.3% shares | Q2 2026 |
| Chickasaw Capital Management LLCAsset manager | 10.5% | $293.6M | 5,212,185 | +0.0% shares | Q3 2026 |
| Glenn GreenbergSuperinvestor · Wealth manager | 3.9% | $179.2M | 3,180,534 | -2.2% shares | Q2 2026 |
| Miller Howard Investments Inc /nyAsset manager | 3.5% | $130.5M | 2,317,575 | -0.4% shares | Q3 2026 |
| Westwood Holdings Group IncInvestment manager | 0.9% | $119.1M | 2,113,845 | -5.5% shares | Q2 2026 |
| Eagle Global Advisors LLCWealth manager | 3.3% | $101.0M | 1,793,816 | -0.6% shares | Q2 2026 |
| Fractal Investments LLCInstitutional asset manager | 10.6% | $93.9M | 1,668,116 | +0.0% shares | Q3 2026 |
| Duff & Phelps Investment Management CoMutual fund manager | 0.9% | $91.2M | 1,618,467 | -3.0% shares | Q2 2026 |
| AlphaCore Capital LLCWealth manager | 1.7% | $91.0M | 1,615,591 | +0.0% shares | Q2 2026 |
| Brookfield Corp /ON/Investment manager | 0.1% | $76.4M | 1,356,028 | -37.6% shares | Q2 2026 |
| CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENTHedge fund | 3.4% | $75.0M | 1,330,800 | -17.6% shares | Q3 2026 |
| Progeny 3, Inc.Investment manager | 3.0% | $57.2M | 1,015,966 | +0.0% shares | Q2 2026 |
| Infrastructure Capital Advisors, LLCMutual fund manager | 4.1% | $52.8M | 936,785 | -12.3% shares | Q2 2026 |
| Americana Partners, LLCWealth manager | 1.0% | $48.3M | 858,158 | +0.2% shares | Q3 2026 |
| Reaves W H & Co IncInvestment manager | 0.6% | $37.8M | 670,500 | +0.0% shares | Q2 2026 |
| U.S. Capital Wealth Advisors, LLCWealth manager | 0.8% | $33.0M | 577,581 | -0.1% shares | Q1 2026 |
| Longfellow Investment Management Co LLCInstitutional asset manager | 6.7% | $32.6M | 579,453 | +0.0% shares | Q2 2026 |
| Recurrent Investment Advisors LLCMutual fund manager | 1.9% | $30.7M | 544,714 | — | Q2 2026 |
| Chicago Partners Investment Group LLCWealth manager | 0.5% | $29.1M | 492,785 | +0.8% shares | Q3 2026 |
| David TepperSuperinvestor · Hedge fund | 0.4% | $28.3M | 502,460 | +0.0% shares | Q2 2026 |
| Oxbow Advisors, LLCWealth manager | 2.0% | $24.8M | 440,557 | +1.5% shares | Q2 2026 |
| Bollard Group LLCWealth manager | 0.7% | $24.3M | 431,910 | +6.5% shares | Q2 2026 |
| Sovereign Investment Advisors, LLCAsset manager | 4.0% | $21.1M | 373,955 | +0.0% shares | Q2 2026 |
| Northside Capital Management, LLCWealth manager | 1.6% | $20.1M | 356,063 | -1.9% shares | Q3 2026 |
| Texas Yale Capital Corp.Wealth manager | 0.4% | $19.4M | 344,263 | +8.6% shares | Q2 2026 |
The 30 largest of 93 positions, by value. Each manager counts with its latest 13F (Q3 2026: 41, Q2 2026: 49, Q1 2026: 3). Screen MPLX in the grand portfolio →
MPLX stock trades by members of Congress
Members of Congress have disclosed 52 MPLX trades since 2015, 6 purchases and 4 sales in the past year; the latest was Mark E. Green (R-TN), selling $500K–1M on Dec 21, 2021.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Jan 3, 2022 | Mark E. GreenR-TN · House | Sale | $500K–1M | Dec 21, 2021 | +111.0% |
| Nov 18, 2021 | Mark E. GreenR-TN · House | Buy | $500K–1M | Nov 8, 2021 | +89.4% |
| May 17, 2021 | Mark E. GreenR-TN · House | Sale | $500K–1M | May 13, 2021 | +112.5% |
| May 2, 2021 | David PerdueR-GA · Senate | Sale | $15K–50K | Apr 15, 2020 | +365.5% |
| May 2, 2021 | David PerdueR-GA · Senate | Sale | $1K–15K | Feb 19, 2020 | +155.1% |
| Apr 28, 2021 | Mark E. GreenR-TN · House | Buy | $100K–250K | Apr 14, 2021 | +129.2% |
| Mar 5, 2021 | Mark E. GreenR-TN · House | Buy | $50K–100K | Mar 1, 2021 | +142.1% |
| Mar 5, 2021 | Mark E. GreenR-TN · House | Buy | $50K–100K | Feb 19, 2021 | +146.9% |
| Mar 5, 2021 | Mark E. GreenR-TN · House | Buy | $100K–250K | Feb 12, 2021 | +145.8% |
| Mar 5, 2021 | Mark E. GreenR-TN · House | Buy | $100K–250K | Jan 19, 2021 | +149.8% |
| Nov 17, 2020 | Mark E. GreenR-TN · House | Sale | $250K–500K | Nov 9, 2020 | +215.4% |
| Oct 29, 2020 | Mark E. GreenR-TN · House | Buy | $50K–100K | Oct 5, 2020 | +272.3% |
| Oct 9, 2020 | Mark E. GreenR-TN · House | Buy | $15K–50K | Sep 16, 2020 | +240.7% |
| Sep 16, 2020 | Mark E. GreenR-TN · House | Buy | $15K–50K | Aug 28, 2020 | +223.4% |
| Aug 18, 2020 | Mark E. GreenR-TN · House | Sale | $100K–250K | Aug 11, 2020 | +213.0% |
| Aug 12, 2020 | Mark E. GreenR-TN · House | Buy | $1K–15K | Aug 6, 2020 | +226.5% |
| Aug 12, 2020 | Mark E. GreenR-TN · House | Buy | $15K–50K | Aug 4, 2020 | +208.0% |
| Aug 12, 2020 | Mark E. GreenR-TN · House | Buy | $1K–15K | Aug 4, 2020 | +208.0% |
| Jul 18, 2020 | Mark E. GreenR-TN · House | Buy | $100K–250K | Jul 2, 2020 | +244.3% |
| Jul 6, 2020 | Mark E. GreenR-TN · House | Buy | $15K–50K | Jun 11, 2020 | +243.9% |
6 members have traded MPLX: Mark E. Green, David Perdue, Patrick J. Toomey, Bill Flores, David A. Trott, Thomas MacArthur.
MPLX questions and answers
Are insiders buying MPLX stock?
No open-market insider purchases or sales of MPLX were filed in the last 90 days.
Which hedge funds own MPLX?
93 13F filers hold MPLX among their 50 largest positions, worth $6.0B combined, including Glenn Greenberg and David Tepper. The biggest bets by portfolio weight are Heronetta Management, L.P. (16.8%), Fractal Investments LLC (10.6%) and Chickasaw Capital Management LLC (10.5%). In their latest 13Fs, 1 manager opened a new position and 15 added to one.
Has Congress traded MPLX?
Members of Congress have disclosed 52 MPLX trades since 2015, 6 purchases and 4 sales in the past year; the latest was Mark E. Green (R-TN), selling $500K–1M on Dec 21, 2021.
Who is the largest holder of MPLX?
Among 13F filers, Alps Advisors Inc reports the largest MPLX position, $1.6B (28,601,592 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Heronetta Management, L.P.'s: 16.8% of its portfolio.
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