Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionAcropolis Investment Management, LLC
Latest Disclosed Ownership4,583 shares
Latest Disclosed Value $ 1,119,118
Acropolis Investment Management, LLC reports 2.55% decrease in ownership of MPC / Marathon Petroleum Corporation

On April 9, 2026 - Acropolis Investment Management, LLC filed a 13F-HR form disclosing ownership of 4,583 shares of Marathon Petroleum Corporation (MX:MPC) valued at $1,119,118 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 4,703 shares of Marathon Petroleum Corporation. This represents a change in shares of -2.55% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-09 2026-03-31 13F MARATHON PETE COM 56585A102 4,583 -120 -2.55 1,119 46.47 0.0495
2026-01-14 2025-12-31 13F MARATHON PETE COM 56585A102 4,703 -36 -0.76 765 -2.92 0.0344
2025-10-07 2025-09-30 13F MARATHON PETE COM 56585A102 4,739 402 9.27 787 9.31 0.0400
2025-07-14 2025-06-30 13F MARATHON PETE COM 56585A102 4,337 -37 -0.85 720 13.03 0.0396
2025-04-17 2025-03-31 13F MARATHON PETE COM 56585A102 4,374 6 0.14 637 4.60 0.0378
2025-01-14 2024-12-31 13F MARATHON PETE COM 56585A102 4,368 0 0.00 609 -14.35 0.0360
2024-11-14 2024-09-30 13F/A-1 MARATHON PETE COM 56585A102 4,368 400 10.08 712 3.34 0.0422
2024-10-31 2024-09-30 13F MARATHON PETE COM 56585A102 3,968 0 688 0.0433
2024-07-16 2024-06-30 13F MARATHON PETE COM 56585A102 3,968 0 0.00 688 -13.89 0.0435
2024-04-17 2024-03-31 13F MARATHON PETE COM 56585A102 3,968 -90 -2.22 800 32.72 0.0523
2024-01-16 2023-12-31 13F MARATHON PETE COM 56585A102 4,058 -60 -1.46 602 -3.37 0.0420
2023-10-11 2023-09-30 13F MARATHON PETE COM 56585A102 4,118 -125 -2.95 623 26.11 0.0483
2023-07-13 2023-06-30 13F MARATHON PETE COM 56585A102 4,243 -338 -7.38 495 -19.94 0.0388
2023-04-11 2023-03-31 13F MARATHON PETE COM 56585A102 4,581 0 0.00 618 15.76 0.0508
2023-01-11 2022-12-31 13F MARATHON PETE COM 56585A102 4,581 -160 -3.37 533 13.16 0.0478
2022-10-12 2022-09-30 13F MARATHON PETE COM 56585A102 4,741 0 0.00 471 20.77 0.0481
2022-07-15 2022-06-30 13F MARATHON PETE COM 56585A102 4,741 -590 -11.07 390 -14.47 0.0383
2022-04-08 2022-03-31 13F MARATHON PETE COM 56585A102 5,331 -213 -3.84 456 28.45 0.0415
2022-01-14 2021-12-31 13F MARATHON PETE COM 56585A102 5,544 -335 -5.70 355 0.28 0.0319
2021-10-12 2021-09-30 13F MARATHON PETE COM 56585A102 5,879 -299 -4.84 354 -5.09 0.0422
2021-07-16 2021-06-30 13F MARATHON PETE COM 56585A102 6,178 -1,574 -20.30 373 -10.12 0.0362
2021-04-12 2021-03-31 13F MARATHON PETE COM 56585A102 7,752 -4,799 -38.24 415 -20.04 0.0424
2021-01-13 2020-12-31 13F MARATHON PETE COM 56585A102 12,551 -8,875 -41.42 519 -17.49 0.0571
2020-10-09 2020-09-30 13F MARATHON PETE COM 56585A102 21,426 -2,905 -11.94 629 -30.88 0.0780
2020-07-15 2020-06-30 13F MARATHON PETE COM 56585A102 24,331 -1,460 -5.66 910 49.43 0.1201
2020-04-10 2020-03-31 13F MARATHON PETE COM 56585A102 25,791 -4,470 -14.77 609 -66.59 0.0953
2020-01-14 2019-12-31 13F MARATHON PETE COM 56585A102 30,261 -1,379 -4.36 1,823 -4.65 0.2523
2019-10-15 2019-09-30 13F MARATHON PETE COM 56585A102 31,640 -799 -2.46 1,912 5.46 0.2759
2019-07-11 2019-06-30 13F MARATHON PETE COM 56585A102 32,439 -430 -1.31 1,813 -7.83 0.2770
2019-04-09 2019-03-31 13F MARATHON PETE COM 56585A102 32,869 -371 -1.12 1,967 0.31 0.3100
2019-01-10 2018-12-31 13F MARATHON PETE COM 56585A102 33,240 12,766 62.35 1,961 19.79 0.3412
2018-10-03 2018-09-30 13F MARATHON PETE COM 56585A102 20,474 -695 -3.28 1,637 10.24 0.2629
2018-07-12 2018-06-30 13F MARATHON PETE COM 56585A102 21,169 -7,501 -26.16 1,485 -29.15 0.2438
2018-04-04 2018-03-31 13F MARATHON PETE COM 56585A102 28,670 -450 -1.55 2,096 9.11 0.3410
2018-01-11 2017-12-31 13F MARATHON PETE COM 56585A102 29,120 -1,615 -5.25 1,921 11.43 0.2944
2017-10-17 2017-09-30 13F/A-1 MARATHON PETE COM 56585A102 30,735 -11,615 -27.43 1,724 -22.20 0.2820
2017-10-12 2017-09-30 13F MARATHON PETE COM 56585A102 14,287 -28,063 1,724 0.2820
2017-07-12 2017-06-30 13F MARATHON PETE COM 56585A102 42,350 -2,015 -4.54 2,216 -1.16 0.3751
2017-04-06 2017-03-31 13F MARATHON PETE COM 56585A102 44,365 -875 -1.93 2,242 -1.58 0.3922
2017-01-06 2016-12-31 13F MARATHON PETE COM 56585A102 45,240 -1,155 -2.49 2,278 20.98 0.4216
2016-10-05 2016-09-30 13F MARATHON PETE COM 56585A102 46,395 -1,315 -2.76 1,883 3.98 0.3484
2016-07-15 2016-06-30 13F MARATHON PETE COM 56585A102 47,710 -95 -0.20 1,811 1.91 0.3423
2016-04-25 2016-03-31 13F MARATHON PETE COM 56585A102 47,805 -1,160 -2.37 1,777 -29.98 0.3416
2016-01-15 2015-12-31 13F MARATHON PETE COM 56585A102 48,965 2,780 6.02 2,538 18.60 0.5050
2015-11-04 2015-09-30 13F MARATHON PETE COM 56585A102 46,185 16,170 53.87 2,140 36.31 0.4414
2015-07-17 2015-06-30 13F MARATHON PETE COM 56585A102 30,015 19,040 173.49 1,570 39.68 0.3071
2015-04-21 2015-03-31 13F MARATHON PETE COM 56585A102 10,975 3,955 56.34 1,124 77.57 0.2099
2015-01-12 2014-12-31 13F MARATHON PETE COM 56585A102 7,020 7,020 634 0.1229
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.