Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionRegions Financial Corp
Latest Disclosed Ownership11,592 shares
Latest Disclosed Value $ 2,830,534
Regions Financial Corp reports 4.04% decrease in ownership of MPC / Marathon Petroleum Corporation

On May 5, 2026 - Regions Financial Corp filed a 13F-HR form disclosing ownership of 11,592 shares of Marathon Petroleum Corporation (US:MPC) valued at $2,830,535 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 12,080 shares of Marathon Petroleum Corporation. This represents a change in shares of -4.04% during the quarter. The current value of the position is $3,097,498 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)
2026-05-05 2026-03-31 13F MARATHON PETE COM 56585A102 11,592 -488 -4.04 2,831 44.09 0.0160
2026-01-27 2025-12-31 13F MARATHON PETE COM 56585A102 12,080 -1,483 -10.93 1,965 -24.87 0.0126
2025-11-19 2025-09-30 13F/A-1 MARATHON PETE COM 56585A102 13,563 -933 -6.44 2,614 8.60 0.0170
2025-11-19 2025-09-30 13F MARATHON PETE COM 56585A102 13,563 -933 2,614 0.0150
2025-07-29 2025-06-30 13F MARATHON PETE COM 56585A102 14,496 -520 -3.46 2,408 10.06 0.0166
2025-05-08 2025-03-31 13F MARATHON PETE COM 56585A102 15,016 -539 -3.47 2,188 0.83 0.0163
2025-02-14 2024-12-31 13F Marathon Petroleum COM 56585A102 15,555 -1,308 -7.76 2,170 -21.04 0.0159
2024-11-14 2024-09-30 13F Marathon Petroleum COM 56585A102 16,863 25 0.15 2,747 -5.96 0.0198
2024-07-31 2024-06-30 13F Marathon Petroleum COM 56585A102 16,838 -502 -2.90 2,921 -16.40 0.0222
2024-04-23 2024-03-31 13F Marathon Petroleum COM 56585A102 17,340 -320 -1.81 3,494 33.36 0.0265
2024-02-06 2023-12-31 13F Marathon Petroleum COM 56585A102 17,660 -184 -1.03 2,620 -2.96 0.0216
2023-11-01 2023-09-30 13F Marathon Petroleum COM 56585A102 17,844 -506 -2.76 2,701 26.23 0.0243
2023-08-09 2023-06-30 13F Marathon Petroleum COM 56585A102 18,350 -359 -1.92 2,140 106,850.00 0.0185
2023-05-12 2023-03-31 13F Marathon Petroleum COM 56585A102 18,709 -26 -0.14 3 0.00 0.0226
2023-02-06 2022-12-31 13F Marathon Petroleum COM 56585A102 18,735 -1,472 -7.28 2 -99.90 0.0200
2022-11-03 2022-09-30 13F Marathon Petroleum COM 56585A102 20,207 -512 -2.47 2,007 17.78 0.0202
2022-07-25 2022-06-30 13F Marathon Petroleum COM 56585A102 20,719 -1,040 -4.78 1,704 -8.39 0.0162
2022-04-25 2022-03-31 13F Marathon Petroleum COM 56585A102 21,759 3,168 17.04 1,860 56.43 0.0150
2022-01-31 2021-12-31 13F Marathon Petroleum COM 56585A102 18,591 288 1.57 1,189 5.13 0.0093
2021-11-04 2021-09-30 13F Marathon Petroleum COM 56585A102 18,303 0 0.00 1,131 2.26 0.0098
2021-07-27 2021-06-30 13F Marathon Petroleum COM 56585A102 18,303 3,230 21.43 1,106 37.05 0.0096
2021-06-02 2021-03-31 13F Marathon Petroleum COM 56585A102 15,073 -663 -4.21 807 24.15 0.0073
2021-02-05 2020-12-31 13F Marathon Petroleum COM 56585A102 15,736 -2,816 -15.18 650 19.49 0.0063
2020-10-15 2020-09-30 13F Marathon Petroleum COM 56585A102 18,552 -4,765 -20.44 544 -37.61 0.0059
2020-07-27 2020-06-30 13F Marathon Petroleum COM 56585A102 23,317 -3,870 -14.23 872 35.83 0.0101
2020-04-29 2020-03-31 13F Marathon Petroleum COM 56585A102 27,187 1,473 5.73 642 -58.55 0.0085
2020-02-03 2019-12-31 13F Marathon Petroleum COM 56585A102 25,714 1,009 4.08 1,549 3.20 0.0162
2019-10-24 2019-09-30 13F Marathon Petroleum COM 56585A102 24,705 -105 -0.42 1,501 8.22 0.0167
2019-07-19 2019-06-30 13F Marathon Petroleum COM 56585A102 24,810 -4,974 -16.70 1,387 -22.21 0.0156
2019-04-19 2019-03-31 13F Marathon Petroleum COM 56585A102 29,784 -5,416 -15.39 1,783 -14.16 0.0205
2019-01-28 2018-12-31 13F Marathon Petroleum COM 56585A102 35,200 3,102 9.66 2,077 -19.09 0.0260
2018-10-22 2018-09-30 13F Marathon Petroleum COM 56585A102 32,098 -769 -2.34 2,567 11.32 0.0277
2018-07-26 2018-06-30 13F Marathon Petroleum COM 56585A102 32,867 -2,533 -7.16 2,306 -10.90 0.0260
2018-04-18 2018-03-31 13F Marathon Petroleum COM 56585A102 35,400 -1,591 -4.30 2,588 6.07 0.0290
2018-01-18 2017-12-31 13F Marathon Petroleum COM 56585A102 36,991 600 1.65 2,440 19.55 0.0264
2017-10-23 2017-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 36,391 -232 -0.63 2,041 6.52 0.0232
2017-07-31 2017-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 36,623 -495 -1.33 1,916 2.13 0.0225
2017-05-02 2017-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 37,118 835 2.30 1,876 2.68 0.0222
2017-02-03 2016-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 36,283 -3,828 -9.54 1,827 12.22 0.0224
2016-10-28 2016-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 40,111 -4,347 -9.78 1,628 -3.55 0.0210
2016-07-26 2016-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 44,458 -2,462 -5.25 1,688 -3.21 0.0219
2016-05-02 2016-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 46,920 -2,834 -5.70 1,744 -32.38 0.0231
2016-01-29 2015-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 49,754 25 0.05 2,579 11.94 0.0346
2015-10-20 2015-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 49,729 -1,267 -2.48 2,304 -13.64 0.0328
2015-07-14 2015-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 50,996 24,440 92.03 2,668 -1.88 0.0354
2015-04-23 2015-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 26,556 -689 -2.53 2,719 10.57 0.0349
2015-01-21 2014-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 27,245 -5,254 -16.17 2,459 -10.65 0.0319
2014-10-27 2014-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 32,499 5,063 18.45 2,752 28.48 0.0343
2014-07-23 2014-06-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 27,436 -2,082 -7.05 2,142 -16.65 0.0262
2014-04-17 2014-03-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 29,518 -7,449 -20.15 2,570 -24.21 0.0326
2014-01-27 2013-12-31 13F MARATHON PETROLEUM COMMON STOCK 56585A102 36,967 383 1.05 3,391 44.11 0.0419
2013-10-18 2013-09-30 13F MARATHON PETROLEUM COMMON STOCK 56585A102 36,584 -3,163 -7.96 2,353 -16.71 0.0311
2013-08-02 2013-06-30 13F MARATHON PETROLEUM COM 56585A102 39,747 39,747 2,825 0.0385
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.