Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionLord, Abbett & Co. Llc
Latest Disclosed Ownership917,711 shares
Latest Disclosed Value $ 224,087
Lord, Abbett & Co. Llc reports 62.52% increase in ownership of MPC / Marathon Petroleum Corporation

On May 14, 2026 - Lord, Abbett & Co. Llc filed a 13F-HR form disclosing ownership of 917,711 shares of Marathon Petroleum Corporation (MX:MPC) valued at $224,087 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 564,670 shares of Marathon Petroleum Corporation. This represents a change in shares of 62.52% during the quarter.

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)
2026-05-14 2026-03-31 13F MARATHON PETE COM 56585A102 917,711 353,041 62.52 224 146.15 0.7316
2026-02-13 2025-12-31 13F MARATHON PETE COM 56585A102 564,670 214,224 61.13 92 35.82 0.2817
2025-11-13 2025-09-30 13F MARATHON PETE COM 56585A102 350,446 71,453 25.61 68 45.65 0.2011
2025-08-14 2025-06-30 13F MARATHON PETE COM 56585A102 278,993 187,986 206.56 46 253.85 0.1491
2025-05-13 2025-03-31 13F MARATHON PETE COM 56585A102 91,007 -65,825 -41.97 13 -38.10 0.0472
2025-02-14 2024-12-31 13F MARATHON PETE CORP COM COM 56585A102 156,832 -119,384 -43.22 22 -52.27 0.0692
2024-12-13 2024-09-30 13F/A-1 Marathon Petroleum COM 56585A102 276,216 -5,808 -2.06 45 -8.33 0.1432
2024-11-14 2024-09-30 13F Marathon Petroleum COM 56585A102 276,216 -5,808 45 0.1451
2024-10-07 2024-06-30 13F/A-1 Marathon Petroleum COM 56585A102 282,024 -173,591 -38.10 49 -47.25 0.1601
2024-08-14 2024-06-30 13F Marathon Petroleum COM 56585A102 282,024 -173,591 49 0.1634
2024-10-07 2024-03-31 13F/A-1 Marathon Petroleum COM 56585A102 455,615 -57,028 -11.12 92 19.74 0.2964
2024-05-09 2024-03-31 13F Marathon Petroleum COM 56585A102 455,615 -57,028 92 0.3017
2024-10-07 2023-12-31 13F/A-1 Marathon Petroleum COM 56585A102 512,643 -229,744 -30.95 76 -32.14 0.2669
2024-02-12 2023-12-31 13F Marathon Petroleum COM 56585A102 512,643 -229,744 76 0.2731
2024-10-07 2023-09-30 13F/A-1 Marathon Petroleum COM 56585A102 742,387 408 0.05 112 30.23 0.4177
2023-11-13 2023-09-30 13F Marathon Petroleum COM 56585A102 742,387 408 112 0.4210
2024-10-07 2023-06-30 13F/A-1 Marathon Petroleum COM 56585A102 741,979 -741,139 -49.97 87 -56.78 0.2978
2023-08-14 2023-06-30 13F Marathon Petroleum COM 56585A102 741,979 -741,139 87 0.2979
2024-10-07 2023-03-31 13F/A-1 Marathon Petroleum COM 56585A102 1,483,118 15,501 1.06 200 17.06 0.7210
2023-05-12 2023-03-31 13F Marathon Petroleum COM 56585A102 1,483,118 15,501 200 0.7221
2024-10-07 2022-12-31 13F/A-1 Marathon Petroleum COM 56585A102 1,467,617 -127,946 -8.02 171 -99.89 0.6104
2023-02-10 2022-12-31 13F Marathon Petroleum COM 56585A102 1,467,617 -127,946 171 0.6118
2022-11-14 2022-09-30 13F MARATHON PETE CORP COM COM 56585A102 1,595,563 -348,383 -17.92 158,488 -0.83 0.5789
2022-08-12 2022-06-30 13F MARATHON PETE CORP COM COM 56585A102 1,943,946 -1,384,940 -41.60 159,811 -43.85 0.5650
2022-05-13 2022-03-31 13F MARATHON PETE CORP COM COM 56585A102 3,328,886 -1,496,044 -31.01 284,618 -7.82 0.7587
2022-02-11 2021-12-31 13F MARATHON PETE CORP COM COM 56585A102 4,824,930 -321,142 -6.24 308,747 -2.93 0.7034
2021-11-09 2021-09-30 13F MARATHON PETE CORP COM COM 56585A102 5,146,072 -77,264 -1.48 318,079 0.79 0.7609
2021-08-11 2021-06-30 13F MARATHON PETE CORP COM COM 56585A102 5,223,336 693,328 15.31 315,595 30.24 0.7610
2021-05-11 2021-03-31 13F MARATHON PETE CORP COM COM 56585A102 4,530,008 3,571,177 372.45 242,311 511.02 0.6174
2021-02-09 2020-12-31 13F MARATHON PETE CORP COM COM 56585A102 958,831 -155,483 -13.95 39,657 21.30 0.1047
2020-11-12 2020-09-30 13F MARATHON PETE CORP COM COM 56585A102 1,114,314 -346,874 -23.74 32,694 -40.14 0.1044
2020-08-14 2020-06-30 13F MARATHON PETE CORP COM COM 56585A102 1,461,188 -237,579 -13.99 54,617 36.12 0.1911
2020-05-14 2020-03-31 13F MARATHON PETE CORP COM COM 56585A102 1,698,767 400,603 30.86 40,124 -48.70 0.1778
2020-02-14 2019-12-31 13F MARATHON PETE CORP COM COM 56585A102 1,298,164 -480,992 -27.03 78,215 -27.64 0.2609
2019-11-14 2019-09-30 13F MARATHON PETE CORP COM COM 56585A102 1,779,156 218,605 14.01 108,086 23.95 0.3679
2019-08-14 2019-06-30 13F MARATHON PETE CORP COM COM 56585A102 1,560,551 -657,473 -29.64 87,204 -34.31 0.2834
2019-05-15 2019-03-31 13F MARATHON PETE CORP COM COM 56585A102 2,218,024 360,413 19.40 132,749 21.10 0.4421
2019-02-14 2018-12-31 13F MARATHON PETE CORP COM COM 56585A102 1,857,611 628,429 51.13 109,618 11.52 0.4003
2018-11-14 2018-09-30 13F MARATHON PETE CORP COM COM 56585A102 1,229,182 210,304 20.64 98,298 37.51 0.2724
2018-08-14 2018-06-30 13F MARATHON PETE CORP COM COM 56585A102 1,018,878 860,878 544.86 71,484 518.86 0.2089
2018-05-15 2018-03-31 13F MARATHON PETE CORP COM COM 56585A102 158,000 -37,100 -19.02 11,551 -10.27 0.0343
2018-02-14 2017-12-31 13F MARATHON PETE CORP COM COM 56585A102 195,100 -1,676 -0.85 12,873 16.66 0.0366
2017-11-14 2017-09-30 13F MARATHON PETE CORP COM COM 56585A102 196,776 -14,224 -6.74 11,035 -0.06 0.0322
2017-08-24 2017-06-30 13F/A-1 MARATHON PETE CORP COM COM 56585A102 211,000 18,900 9.84 11,042 13.73 0.0328
2017-08-14 2017-06-30 13F MARATHON PETE CORP COM COM 56585A102 211,000 18,900 11,042
2017-05-15 2017-03-31 13F MARATHON PETE CORP COM COM 56585A102 192,100 4,400 2.34 9,709 2.73 0.0291
2017-02-14 2016-12-31 13F MARATHON PETE CORP COM COM 56585A102 187,700 187,700 9,451 0.0287
2016-11-10 2016-09-30 13F MARATHON PETE CORP COM COM 56585A102 0 -81,132 -100.00 0 -100.00
2016-08-12 2016-06-30 13F MARATHON PETE CORP COM COM 56585A102 81,132 -3,760 -4.43 3,080 -2.41 0.0096
2016-05-16 2016-03-31 13F MARATHON PETE CORP COM COM 56585A102 84,892 36,524 75.51 3,156 25.89 0.0099
2016-02-16 2015-12-31 13F MARATHON PETE CORP COM COM 56585A102 48,368 1,051 2.22 2,507 14.37 0.0075
2015-11-16 2015-09-30 13F MARATHON PETE CORP COM COM 56585A102 47,317 -597 -1.25 2,192 -13.43 0.0066
2015-08-14 2015-06-30 13F MARATHON PETE CORP COM COM 56585A102 47,914 22,801 90.79 2,532 -1.56 0.0067
2015-05-15 2015-03-31 13F MARATHON PETE CORP COM COM 56585A102 25,113 -873,858 -97.21 2,572 -96.83 0.0065
2015-02-13 2014-12-31 13F Marathon Petroleum COM 56585A102 898,971 478,878 113.99 81,141 128.12 0.2057
2014-11-14 2014-09-30 13F Marathon Petroleum COM 56585A102 420,093 -187,900 -30.90 35,569 -25.07 0.0892
2014-08-20 2014-06-30 13F/A-1 MARATHON PETE CORP COM COM 56585A102 607,993 -1,235,268 -67.02 47,471 -70.41 0.1078
2014-08-14 2014-06-30 13F MARATHON PETE CORP COM COM 56585A102 607,993 47,471
2014-05-15 2014-03-31 13F MARATHON PETE COM 56585A102 1,843,261 144,386 8.50 160,438 2.95 0.3654
2014-03-05 2013-12-31 13F/A-1 Marathon Petroleum COM 56585A102 1,698,875 741,883 77.52 155,838 153.18 0.3468
2014-02-14 2013-12-31 13F Marathon Petroleum COM 56585A102 1,698,875 155,838
2013-11-14 2013-09-30 13F Marathon Petroleum COM 56585A102 956,992 830,490 656.50 61,553 584.30 0.1418
2013-08-14 2013-06-30 13F Marathon Petroleum COM 56585A102 126,502 126,502 8,995 0.0208
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.