MPLX LP - Limited Partnership
US ˙ NYSE ˙ US55336V1008

SecurityMPLX / MPLX LP - Limited Partnership
InstitutionKovack Advisors, Inc.
Latest Disclosed Ownership22,385 shares
Latest Disclosed Value $ 1,270,403
Kovack Advisors, Inc. reports 0.74% decrease in ownership of MPLX / MPLX LP - Limited Partnership

On May 12, 2026 - Kovack Advisors, Inc. filed a 13F-HR form disclosing ownership of 22,385 shares of MPLX LP - Limited Partnership (US:MPLX) valued at $1,277,512 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 17, 2026 disclosing 22,551 shares of MPLX LP - Limited Partnership. This represents a change in shares of -0.74% during the quarter. The current value of the position is $1,236,995 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)
2026-05-12 2026-03-31 13F MPLX COM UNIT REP LTD 55336V100 22,385 -166 -0.74 1,270 5.57 0.0678
2026-02-17 2025-12-31 13F/A-1 MPLX COM UNIT REP LTD 55336V100 22,551 15,634 226.02 1,204 248.70 0.0559
2026-02-12 2025-12-31 13F MPLX COM UNIT REP LTD 55336V100 22,551 15,634 380 0.0291
2025-11-10 2025-09-30 13F MPLX COM UNIT REP LTD 55336V100 6,917 64 0.93 345 -2.27 0.0325
2025-08-04 2025-06-30 13F MPLX COM UNIT REP LTD 55336V100 6,853 60 0.88 353 -2.75 0.0346
2025-05-06 2025-03-31 13F MPLX COM UNIT REP LTD 55336V100 6,793 -6,884 -50.33 364 -44.50 0.0385
2025-02-05 2024-12-31 13F MPLX COM UNIT REP LTD 55336V100 13,677 -1,837 -11.84 655 -5.08 0.0642
2024-11-05 2024-09-30 13F MPLX COM UNIT REP LTD 55336V100 15,514 -1,408 -8.32 690 -4.31 0.0731
2024-08-05 2024-06-30 13F MPLX COM UNIT REP LTD 55336V100 16,922 -84 -0.49 721 1.98 0.0793
2024-04-19 2024-03-31 13F MPLX COM UNIT REP LTD 55336V100 17,006 60 0.35 707 13.50 0.0856
2024-02-02 2023-12-31 13F MPLX COM UNIT REP LTD 55336V100 16,946 1,522 9.87 622 13.50 0.0739
2023-10-19 2023-09-30 13F MPLX COM UNIT REP LTD 55336V100 15,424 -1,163 -7.01 549 -2.49 0.0765
2023-07-21 2023-06-30 13F MPLX COM UNIT REP LTD 55336V100 16,587 62 0.38 563 -1.23 0.0721
2023-04-21 2023-03-31 13F MPLX COM UNIT REP LTD 55336V100 16,525 40 0.24 569 5.18 0.0776
2023-02-22 2022-12-31 13F MPLX COM UNT UNT 55336V100 16,485 2,524 18.08 541 29.12 0.0791
2022-11-14 2022-09-30 13F MPLX COM UNT UNT 55336V100 13,961 192 1.39 419 4.49 0.0615
2022-08-10 2022-06-30 13F MPLX COM UNT UNT 55336V100 13,769 13,769 401 0.0529
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.