MPLX LP - Limited Partnership
US ˙ NYSE ˙ US55336V1008

SecurityMPLX / MPLX LP - Limited Partnership
InstitutionLee Financial Co
Latest Disclosed Ownership7,372 shares
Latest Disclosed Value $ 420,721
Lee Financial Co ownership in MPLX / MPLX LP - Limited Partnership

On April 13, 2026 - Lee Financial Co filed a 13F-HR form disclosing ownership of 7,372 shares of MPLX LP - Limited Partnership (US:MPLX) valued at $420,720 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 22, 2026 disclosing 7,372 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 $416,371 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)
2026-04-13 2026-03-31 13F MPLX COM UNIT REP LTD 55336V100 7,372 0 0.00 421 6.87 0.0560
2026-01-22 2025-12-31 13F MPLX COM UNIT REP LTD 55336V100 7,372 -9,307 -55.80 393 -52.82 0.0487
2025-11-04 2025-09-30 13F MPLX COM UNIT REP LTD 55336V100 16,679 9,307 126.25 833 119.79 0.1045
2025-07-24 2025-06-30 13F MPLX COM UNIT REP LTD 55336V100 7,372 0 0.00 380 -3.81 0.0545
2025-05-13 2025-03-31 13F MPLX COM UNIT REP LTD 55336V100 7,372 -9,770 -56.99 395 -51.95 0.0603
2025-01-30 2024-12-31 13F MPLX COM UNIT REP LTD 55336V100 17,142 0 0.00 820 7.61 0.1152
2024-11-14 2024-09-30 13F MPLX COM UNIT REP LTD 55336V100 17,142 10,072 142.46 762 153.16 0.1082
2024-08-14 2024-06-30 13F MPLX COM UNIT REP LTD 55336V100 7,070 249 3.65 301 6.36 0.0491
2024-05-15 2024-03-31 13F MPLX COM UNIT REP LTD 55336V100 6,821 0 0.00 283 13.20 0.0473
2024-02-08 2023-12-31 13F MPLX COM UNIT REP LTD 55336V100 6,821 0 0.00 250 3.31 0.0439
2023-11-09 2023-09-30 13F MPLX COM UNIT REP LTD 55336V100 6,821 329 5.07 243 10.00 0.0452
2023-08-08 2023-06-30 13F MPLX COM UNIT REP LTD 55336V100 6,492 317 5.13 220 3.77 0.0386
2023-05-15 2023-03-31 13F MPLX COM UNIT REP LTD 55336V100 6,175 9 0.15 213 4.95 0.0365
2023-02-09 2022-12-31 13F MPLX COM UNIT REP LTD 55336V100 6,166 0 0.00 202 9.19 0.0346
2022-11-02 2022-09-30 13F MPLX COM UNIT REP LTD 55336V100 6,166 0 0.00 185 2.78 0.0346
2022-08-10 2022-06-30 13F MPLX COM UNIT REP LTD 55336V100 6,166 0 0.00 180 -12.20 0.0330
2022-05-11 2022-03-31 13F MPLX COM UNIT REP LTD 55336V100 6,166 0 0.00 205 12.64 0.0367
2022-02-08 2021-12-31 13F MPLX COM UNIT REP LTD 55336V100 6,166 0 0.00 182 3.41 0.0342
2021-11-12 2021-09-30 13F MPLX COM UNIT REP LTD 55336V100 6,166 0 0.00 176 -3.30 0.0364
2021-08-04 2021-06-30 13F MPLX COM UNIT REP LTD 55336V100 6,166 0 0.00 182 15.19 0.0386
2021-05-13 2021-03-31 13F MPLX COM UNIT REP LTD 55336V100 6,166 0 0.00 158 17.91 0.0375
2021-02-12 2020-12-31 13F MPLX COM UNIT REP LTD 55336V100 6,166 -534 -7.97 134 26.42 0.0348
2020-11-03 2020-09-30 13F MPLX COM UNIT REP LTD 55336V100 6,700 -538 -7.43 106 -15.20 0.0296
2020-08-11 2020-06-30 13F MPLX COM UNIT REP LTD 55336V100 7,238 548 8.19 125 62.34 0.0347
2020-05-07 2020-03-31 13F MPLX COM UNIT REP LTD 55336V100 6,690 750 12.63 77 -49.01 0.0255
2020-02-14 2019-12-31 13F MPLX COM UNIT REP LTD 55336V100 5,940 16 0.27 151 -9.04 0.0326
2019-11-08 2019-09-30 13F MPLX COM UNIT REP LTD 55336V100 5,924 1,515 34.36 166 16.90 0.0373
2019-07-30 2019-06-30 13F MPLX COM UNIT REP LTD 55336V100 4,409 3,864 708.99 142 688.89 0.0321
2019-04-30 2019-03-31 13F MPLX COM UNIT REP LTD 55336V100 545 0 0.00 18 5.88 0.0042
2019-02-11 2018-12-31 13F MPLX COM UNIT REP LTD 55336V100 545 0 0.00 17 -10.53 0.0046
2018-11-07 2018-09-30 13F MPLX COM UNIT REP LTD 55336V100 545 -7,645 -93.35 19 -93.21 0.0047
2018-08-14 2018-06-30 13F MPLX COM UNIT REP LTD 55336V100 8,190 -3,729 -31.29 280 -28.93 0.0660
2018-05-09 2018-03-31 13F MPLX COM UNIT REP LTD 55336V100 11,919 11,374 2,086.97 394 1,973.68 0.1000
2018-02-09 2017-12-31 13F MPLX COM UNIT REP LTD 55336V100 545 0 0.00 19 0.00 0.0055
2017-11-07 2017-09-30 13F MPLX COM UNIT REP LTD 55336V100 545 0 0.00 19 5.56 0.0061
2017-07-27 2017-06-30 13F MPLX COM UNIT REP LTD 55336V100 545 0 0.00 18 -10.00 0.0066
2017-05-09 2017-03-31 13F MPLX COM UNIT REP LTD 55336V100 545 0 0.00 20 5.26 0.0080
2017-02-14 2016-12-31 13F MPLX COM UNIT REP LTD 55336V100 545 545 19 0.0106
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.