MPLX LP - 有限合夥企業
US ˙ NYSE ˙ US55336V1008

SecurityMPLX / MPLX LP - Limited Partnership
InstitutionBarnett & Company, Inc.
Latest Disclosed Ownership37,247 shares
Latest Disclosed Value $ 2,125,686
Barnett & Company, Inc. reports 2.21% decrease in ownership of MPLX / MPLX LP - Limited Partnership

On April 30, 2026 - Barnett & Company, Inc. filed a 13F-HR form disclosing ownership of 37,247 shares of MPLX LP - Limited Partnership (US:MPLX) valued at $2,125,686 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 38,087 shares of MPLX LP - Limited Partnership. This represents a change in shares of -2.21% during the quarter. The current value of the position is $2,103,338 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-04-30 2026-03-31 13F MPLX COM 55336V100 37,247 -840 -2.21 2,126 4.58 1.6520
2026-02-12 2025-12-31 13F MPLX COM UNIT REP LTD 55336V100 38,087 -700 -1.80 2,033 4.90
2025-11-10 2025-09-30 13F MPLX COM UNIT REP LTD 55336V100 38,787 -1,060 -2.66 1,937 -5.60 1.4981
2025-08-14 2025-06-30 13F MPLX COM UNIT REP LTD 55336V100 39,847 -240 -0.60 2,053 -4.34 1.6146
2025-05-12 2025-03-31 13F MPLX COM UNIT REP LTD 55336V100 40,087 -3,100 -7.18 2,145 3.82 1.7933
2025-02-11 2024-12-31 13F MPLX COM UNIT REP LTD 55336V100 43,187 -500 -1.14 2,067 6.39 1.3534
2024-11-05 2024-09-30 13F MPLX COM UNIT REP LTD 55336V100 43,687 -200 -0.46 1,942 3.91 1.2829
2024-08-12 2024-06-30 13F MPLX COM UNIT REP LTD 55336V100 43,887 -333 -0.75 1,869 1.74 1.3414
2024-05-14 2024-03-31 13F MPLX COM UNIT REP LTD 55336V100 44,220 -800 -1.78 1,838 11.13 1.2576
2024-02-06 2023-12-31 13F MPLX COM UNIT REP LTD 55336V100 45,020 -400 -0.88 1,653 2.35 1.2399
2023-10-30 2023-09-30 13F MPLX COM UNIT REP LTD 55336V100 45,420 -1,300 -2.78 1,616 1.89 1.2619
2023-08-02 2023-06-30 13F MPLX COM UNIT REP LTD 55336V100 46,720 0 0.00 1,586 -1.49 1.1783
2023-05-03 2023-03-31 13F MPLX COM UNIT REP LTD 55336V100 46,720 -2,000 -4.11 1,610 0.63 1.2228
2023-01-26 2022-12-31 13F MPLX COM UNIT REP LTD 55336V100 48,720 -6,700 -12.09 1,600 -3.85 1.2223
2022-11-02 2022-09-30 13F MPLX COM UNIT REP LTD 55336V100 55,420 -1,600 -2.81 1,663 0.06 1.4686
2022-08-02 2022-06-30 13F MPLX COM UNIT REP LTD 55336V100 57,020 0 0.00 1,662 -12.16 1.3289
2022-04-28 2022-03-31 13F MPLX COM UNIT REP LTD 55336V100 57,020 270 0.48 1,892 12.69 1.3425
2022-02-02 2021-12-31 13F MPLX COM UNIT REP LTD 55336V100 56,750 -2,150 -3.65 1,679 0.12 1.1708
2021-11-04 2021-09-30 13F MPLX COM UNIT REP LTD 55336V100 58,900 450 0.77 1,677 -3.12 1.2625
2021-07-20 2021-06-30 13F MPLX COM UNIT REP LTD 55336V100 58,450 48,610 494.00 1,731 586.90 1.1441
2021-04-19 2021-03-31 13F MPLX COM UNIT REP LTD 55336V100 9,840 4,450 82.56 252 117.24 0.1342
2021-02-12 2020-12-31 13F MPLX COM UNIT REP LTD 55336V100 5,390 -2,200 -28.99 116 -2.52 0.0729
2020-11-03 2020-09-30 13F MPLX COM UNIT REP LTD 55336V100 7,590 -960 -11.23 119 -19.59 0.0849
2020-07-22 2020-06-30 13F MPLX COM UNIT REP LTD 55336V100 8,550 -240 -2.73 148 45.10 0.1201
2020-04-23 2020-03-31 13F MPLX COM UNIT REP LTD 55336V100 8,790 850 10.71 102 -49.50 0.0981
2020-01-22 2019-12-31 13F MPLX COM UNIT REP LTD 55336V100 7,940 -2,420 -23.36 202 -30.34 0.1228
2019-11-12 2019-09-30 13F MPLX COM UNIT REP LTD 55336V100 10,360 -310 -2.91 290 -15.45 0.1697
2019-07-30 2019-06-30 13F MPLX COM UNIT REP LTD 55336V100 10,670 0 0.00 343 -2.28 0.1933
2019-04-26 2019-03-31 13F MPLX COM UNIT REP LTD 55336V100 10,670 -920 -7.94 351 0.00 0.2003
2019-02-15 2018-12-31 13F MPLX COM UNIT REP LTD 55336V100 11,590 -320 -2.69 351 -15.01 0.2006
2018-11-02 2018-09-30 13F MPLX COM UNIT REP LTD 55336V100 11,910 1,980 19.94 413 21.83 0.1879
2018-08-03 2018-06-30 13F MPLX COM UNIT REP LTD 55336V100 9,930 9,930 339 0.1644
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.