MPLX LP - Limited Partnership
US ˙ NYSE ˙ US55336V1008

SecurityMPLX / MPLX LP - Limited Partnership
InstitutionMonetary Management Group Inc
Latest Disclosed Ownership11,600 shares
Latest Disclosed Value $ 662,012
Monetary Management Group Inc ownership in MPLX / MPLX LP - Limited Partnership

On May 13, 2026 - Monetary Management Group Inc filed a 13F-HR form disclosing ownership of 11,600 shares of MPLX LP - Limited Partnership (US:MPLX) valued at $662,012 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 11,600 shares of MPLX LP - Limited Partnership. This represents a change in shares of 0.00% during the quarter. The current value of the position is $655,052 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.

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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)
2026-05-13 2026-03-31 13F MPLX Com Unit Rep COM 55336V100 11,600 0 0.00 662 6.95 0.1581
2026-02-11 2025-12-31 13F MPLX Com Unit Rep COM 55336V100 11,600 0 0.00 619 6.91 0.1431
2025-11-12 2025-09-30 13F MPLX Com Unit Rep COM 55336V100 11,600 0 0.00 579 -3.02 0.1330
2025-08-14 2025-06-30 13F MPLX Com Unit Rep COM 55336V100 11,600 0 0.00 598 -3.71 0.1471
2025-05-14 2025-03-31 13F MPLX Com Unit Rep COM 55336V100 11,600 0 0.00 621 11.71 0.1678
2025-02-13 2024-12-31 13F MPLX Com Unit Rep COM 55336V100 11,600 0 0.00 555 7.77 0.1443
2024-11-13 2024-09-30 13F MPLX Com Unit Rep COM 55336V100 11,600 0 0.00 516 4.25 0.1325
2024-07-16 2024-06-30 13F MPLX Com Unit Rep COM 55336V100 11,600 706 6.48 494 9.29 0.1306
2024-05-13 2024-03-31 13F MPLX Com Unit Rep COM 55336V100 10,894 0 0.00 453 13.00 0.1261
2024-02-14 2023-12-31 13F MPLX Com Unit Rep COM 55336V100 10,894 0 0.00 400 3.36 0.1248
2023-11-09 2023-09-30 13F MPLX Com Unit Rep COM 55336V100 10,894 0 0.00 388 4.88 0.1292
2023-08-11 2023-06-30 13F MPLX Com Unit Rep COM 55336V100 10,894 0 0.00 370 -1.60 0.1133
2023-05-11 2023-03-31 13F MPLX Com Unit Rep COM 55336V100 10,894 0 0.00 375 5.04 0.1104
2023-02-13 2022-12-31 13F MPLX Com Unit Rep COM 55336V100 10,894 0 0.00 358 9.17 0.1117
2022-11-14 2022-09-30 13F MPLX Com Unit Rep COM 55336V100 10,894 -441 -3.89 327 -0.91 0.1078
2022-08-11 2022-06-30 13F MPLX Com Unit Rep COM 55336V100 11,335 0 0.00 330 -12.23 0.1034
2022-05-12 2022-03-31 13F MPLX Com Unit Rep COM 55336V100 11,335 441 4.05 376 16.77 0.0996
2022-02-14 2021-12-31 13F MPLX Com Unit Rep COM 55336V100 10,894 0 0.00 322 3.87 0.0797
2021-11-12 2021-09-30 13F MPLX Com Unit Rep COM 55336V100 10,894 1,000 10.11 310 5.80 0.0852
2021-08-12 2021-06-30 13F MPLX Com Unit Rep COM 55336V100 9,894 0 0.00 293 15.35 0.0883
2021-05-17 2021-03-31 13F MPLX Com Unit Rep COM 55336V100 9,894 0 0.00 254 18.69 0.0799
2021-02-12 2020-12-31 13F MPLX Com Unit Rep COM 55336V100 9,894 0 0.00 214 37.18 0.0705
2020-11-12 2020-09-30 13F MPLX Com Unit Rep COM 55336V100 9,894 0 0.00 156 -8.77 0.0556
2020-08-13 2020-06-30 13F MPLX Com Unit Rep COM 55336V100 9,894 -1,500 -13.16 171 29.55 0.0646
2020-05-14 2020-03-31 13F MPLX Com Unit Rep COM 55336V100 11,394 -1,200 -9.53 132 -58.88 0.0584
2020-02-13 2019-12-31 13F MPLX Com Unit Rep COM 55336V100 12,594 0 0.00 321 -9.07 0.1173
2019-11-12 2019-09-30 13F MPLX Com Unit Rep COM 55336V100 12,594 794 6.73 353 -7.11 0.1336
2019-08-13 2019-06-30 13F MPLX Com Unit Rep COM 55336V100 11,800 0 0.00 380 -2.06 0.1459
2019-05-14 2019-03-31 13F MPLX Com Unit Rep COM 55336V100 11,800 0 0.00 388 8.38 0.1536
2019-02-13 2018-12-31 13F MPLX Com Unit Rep COM 55336V100 11,800 0 0.00 358 -12.47 0.1618
2018-11-13 2018-09-30 13F MPLX Com Unit Rep COM 55336V100 11,800 0 0.00 409 1.49 0.1562
2018-08-13 2018-06-30 13F MPLX Com Unit Rep COM 55336V100 11,800 0 0.00 403 3.33 0.1644
2018-05-14 2018-03-31 13F MPLX Com Unit Rep COM 55336V100 11,800 -2,400 -16.90 390 -22.62 0.1617
2018-02-14 2017-12-31 13F MPLX Com Unit Rep COM 55336V100 14,200 0 0.00 504 1.41 0.2031
2017-11-13 2017-09-30 13F MPLX Com Unit Rep COM 55336V100 14,200 3,250 29.68 497 35.79 0.2095
2017-08-14 2017-06-30 13F MPLX Com Unit Rep COM 55336V100 10,950 0 0.00 366 -7.34 0.1496
2017-05-15 2017-03-31 13F MPLX Com Unit Rep COM 55336V100 10,950 0 0.00 395 4.22 0.1717
2017-02-13 2016-12-31 13F MPLX Com Unit Rep COM 55336V100 10,950 6,950 173.75 379 180.74 0.1751
2016-11-10 2016-09-30 13F MPLX Com Unit Rep COM 55336V100 4,000 0 0.00 135 0.00 0.0625
2016-08-12 2016-06-30 13F MPLX Com Unit Rep COM 55336V100 4,000 0 0.00 135 13.45 0.0628
2016-05-11 2016-03-31 13F MPLX Com Unit Rep COM 55336V100 4,000 262 7.01 119 -19.05 0.0579
2016-02-11 2015-12-31 13F MPLX Com Unit Rep COM 55336V100 3,738 3,738 147 0.0704
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.