MPLX LP - Limited Partnership
US ˙ NYSE ˙ US55336V1008

SecurityMPLX / MPLX LP - Limited Partnership
InstitutionVan Eck Associates Corp
Latest Disclosed Ownership112,001 shares
Latest Disclosed Value $ 6,392
Van Eck Associates Corp reports 69.09% increase in ownership of MPLX / MPLX LP - Limited Partnership

On May 15, 2026 - Van Eck Associates Corp filed a 13F-HR form disclosing ownership of 112,001 shares of MPLX LP - Limited Partnership (US:MPLX) valued at $6,391,897 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 66,239 shares of MPLX LP - Limited Partnership. This represents a change in shares of 69.09% during the quarter. The current value of the position is $6,189,175 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)
2026-05-15 2026-03-31 13F MPLX COM UNIT REP LTD 55336V100 112,001 45,762 69.09 6 100.00 0.0042
2026-02-13 2025-12-31 13F MPLX COM UNIT REP LTD 55336V100 66,239 -2,984 -4.31 4 0.00 0.0029
2025-11-13 2025-09-30 13F MPLX COM UNIT REP LTD 55336V100 69,223 -8,432 -10.86 3 -25.00 0.0032
2025-08-14 2025-06-30 13F MPLX COM UNIT REP LTD 55336V100 77,655 5,131 7.07 4 33.33 0.0045
2025-05-15 2025-03-31 13F MPLX COM UNIT REP LTD 55336V100 72,524 4,235 6.20 4 0.00 0.0050
2025-01-29 2024-12-31 13F MPLX COM UNIT REP LTD 55336V100 68,289 10,480 18.13 3 50.00 0.0042
2024-10-29 2024-09-30 13F MPLX COM UNIT REP LTD 55336V100 57,809 5,569 10.66 3 0.00 0.0032
2024-07-31 2024-06-30 13F MPLX COM UNIT REP LTD 55336V100 52,240 8,567 19.62 2 100.00 0.0032
2024-04-30 2024-03-31 13F MPLX COM UNIT REP LTD 55336V100 43,673 -12,372 -22.08 2 -50.00 0.0027
2024-02-05 2023-12-31 13F MPLX COM UNIT REP LTD 55336V100 56,045 4,907 9.60 2 100.00 0.0037
2023-11-08 2023-09-30 13F MPLX COM UNIT REP LTD 55336V100 51,138 12,128 31.09 2 0.00 0.0040
2023-08-03 2023-06-30 13F MPLX COM UNIT REP LTD 55336V100 39,010 5,645 16.92 1 0.00 0.0029
2023-05-03 2023-03-31 13F MPLX COM UNIT REP LTD 55336V100 33,365 -4,709 -12.37 1 0.00 0.0026
2023-02-08 2022-12-31 13F MPLX COM UNIT REP LTD 55336V100 38,074 -1,623 -4.09 1 -99.92 0.0032
2022-10-27 2022-09-30 13F MPLX COM UNIT REP LTD 55336V100 39,697 -2,775 -6.53 1,191 -3.80 0.0035
2022-08-03 2022-06-30 13F MPLX COM UNIT REP LTD 55336V100 42,472 8,155 23.76 1,238 8.69 0.0033
2022-05-10 2022-03-31 13F MPLX COM UNIT REP LTD 55336V100 34,317 2,918 9.29 1,139 22.60 0.0024
2022-01-26 2021-12-31 13F MPLX COM UNIT REP LTD 55336V100 31,399 500 1.62 929 5.57 0.0021
2021-11-03 2021-09-30 13F MPLX COM UNIT REP LTD 55336V100 30,899 -363 -1.16 880 -4.97 0.0022
2021-08-10 2021-06-30 13F MPLX COM UNIT REP LTD 55336V100 31,262 -7,121 -18.55 926 -5.89 0.0022
2021-05-13 2021-03-31 13F MPLX COM UNIT REP LTD 55336V100 38,383 -804 -2.05 984 16.04 0.0027
2021-02-09 2020-12-31 13F MPLX COM UNIT REP LTD 55336V100 39,187 -8,249 -17.39 848 13.52 0.0025
2020-12-04 2020-09-30 13F/A-1 MPLX COM UNIT REP LTD 55336V100 47,436 5,287 12.54 747 2.61 0.0024
2020-11-12 2020-09-30 13F MPLX COM UNIT REP LTD 55336V100 47,436 5,287 747 2,315.9644
2020-08-14 2020-06-30 13F/A-1 MPLX COM UNIT REP LTD 55336V100 42,149 -10,726 -20.29 728 18.57 0.0025
2020-08-10 2020-06-30 13F MPLX COM UNIT REP LTD 55336V100 42,149 -10,726 728 2,473.1990
2020-05-12 2020-03-31 13F MPLX COM UNIT REP LTD 55336V100 52,875 7,699 17.04 614 -46.61 0.0031
2020-02-13 2019-12-31 13F MPLX COM UNIT REP LTD 55336V100 45,176 27,450 154.86 1,150 131.39 0.0044
2019-11-08 2019-09-30 13F MPLX COM UNIT REP LTD 55336V100 17,726 -5,156 -22.53 497 -32.56 0.0023
2019-08-07 2019-06-30 13F MPLX COM UNIT REP LTD 55336V100 22,882 720 3.25 737 1.10 0.0036
2019-05-13 2019-03-31 13F MPLX COM UNIT REP LTD 55336V100 22,162 22,162 729 0.0036
2017-05-11 2017-03-31 13F MPLX COM UNIT REP LTD 55336V100 0 -36,290 -100.00 0 -100.00
2017-02-09 2016-12-31 13F MPLX COM UNIT REP LTD 55336V100 36,290 -1,789 -4.70 1,256 -2.56 0.0063
2016-11-14 2016-09-30 13F MPLX COM UNIT REP LTD 55336V100 38,079 2,154 6.00 1,289 6.71 0.0060
2016-08-12 2016-06-30 13F MPLX COM UNIT REP LTD 55336V100 35,925 535 1.51 1,208 14.94 0.0062
2016-05-13 2016-03-31 13F MPLX COM UNIT REP LTD 55336V100 35,390 35,390 1,051 0.0071
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.