MPLX LP - Limited Partnership
US ˙ NYSE ˙ US55336V1008

SecurityMPLX / MPLX LP - Limited Partnership
InstitutionSpire Wealth Management
Latest Disclosed Ownership11,260 shares
Latest Disclosed Value $ 642,623
Spire Wealth Management reports 8.17% increase in ownership of MPLX / MPLX LP - Limited Partnership

On April 22, 2026 - Spire Wealth Management filed a 13F-HR form disclosing ownership of 11,260 shares of MPLX LP - Limited Partnership (US:MPLX) valued at $642,608 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 10,410 shares of MPLX LP - Limited Partnership. This represents a change in shares of 8.17% during the quarter. The current value of the position is $635,965 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)
2026-04-22 2026-03-31 13F MPLX COM UNIT REP LTD 55336V100 11,260 850 8.17 643 15.68 0.0138
2026-01-14 2025-12-31 13F MPLX COM UNIT REP LTD 55336V100 10,410 1,476 16.52 556 24.44 0.0186
2025-10-23 2025-09-30 13F MPLX COM UNIT REP LTD 55336V100 8,934 1,483 19.90 446 16.45 0.0152
2025-08-04 2025-06-30 13F MPLX COM UNIT REP LTD 55336V100 7,451 -1,501 -16.77 384 -20.04 0.0138
2025-04-23 2025-03-31 13F MPLX COM UNIT REP LTD 55336V100 8,952 807 9.91 479 23.14 0.0153
2025-01-24 2024-12-31 13F MPLX COM UNIT REP LTD 55336V100 8,145 -547 -6.29 390 0.78 0.0121
2024-10-15 2024-09-30 13F MPLX COM UNIT REP LTD 55336V100 8,692 1,103 14.53 386 19.50 0.0130
2024-07-31 2024-06-30 13F MPLX COM UNIT REP LTD 55336V100 7,589 -63 -0.82 323 1.57 0.0114
2024-04-24 2024-03-31 13F MPLX COM UNIT REP LTD 55336V100 7,652 -178 -2.27 318 9.66 0.0058
2024-02-06 2023-12-31 13F MPLX COM UNIT REP LTD 55336V100 7,830 3,268 71.64 290 79.01 0.0096
2023-11-08 2023-09-30 13F MPLX COM UNIT REP LTD 55336V100 4,562 258 5.99 162 10.96 0.0062
2023-08-09 2023-06-30 13F MPLX COM UNIT REP LTD 55336V100 4,304 9 0.21 146 -0.68 0.0054
2023-05-09 2023-03-31 13F MPLX COM UNIT REP LTD 55336V100 4,295 970 29.17 148 0.0058
2023-02-03 2022-12-31 13F MPLX COM UNIT REP LTD 55336V100 3,325 500 17.70 0 -100.00 0.0061
2022-11-07 2022-09-30 13F MPLX COM UNIT REP LTD 55336V100 2,825 -346 -10.91 85 -7.61 0.0052
2022-07-22 2022-06-30 13F MPLX COM UNIT REP LTD 55336V100 3,171 8 0.25 92 -12.38 0.0038
2022-04-18 2022-03-31 13F MPLX COM UNIT REP LTD 55336V100 3,163 -9,955 -75.89 105 -72.94 0.0028
2022-01-14 2021-12-31 13F MPLX COM UNIT REP LTD 55336V100 13,118 9,975 317.37 388 335.96 0.0086
2021-10-22 2021-09-30 13F MPLX COM UNIT REP LTD 55336V100 3,143 859 37.61 89 30.88 0.0024
2021-07-26 2021-06-30 13F MPLX COM UNIT REP LTD 55336V100 2,284 -9,273 -80.24 68 -76.95 0.0018
2021-05-21 2021-03-31 13F/A-1 MPLX COM UNIT REP LTD 55336V100 11,557 11,557 295 0.0078
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.