Marathon Petroleum Corporation
MX ˙ BMV ˙ US56585A1025
SecurityMX:MPC / Marathon Petroleum Corporation
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership125,675 shares
Latest Disclosed Value $ 30,700,912
Advisor Group Holdings, Inc. ownership in MPC / Marathon Petroleum Corporation

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 125,675 shares of Marathon Petroleum Corporation (MX:MPC) valued at $30,700,912 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 123,107 shares of Marathon Petroleum Corporation. This represents a change in shares of 2.09% during the quarter.

Advisor Group Holdings, Inc. has a history of taking positions in derivatives of the underlying security (MPC) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:MPC / Marathon Petroleum Corporation Historical Put/Call Ratio
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)
2026-05-15 2026-03-31 13F MARATHON PETE COM 56585A102 125,675 2,568 2.09 30,701 53.25 0.0261
2026-02-17 2025-12-31 13F MARATHON PETE COM 56585A102 123,107 -16,016 -11.51 20,034 -23.28 0.0293
2025-11-14 2025-09-30 13F MARATHON PETE COM 56585A102 139,123 9,504 7.33 26,112 22.22 0.0365
2025-09-04 2025-06-30 13F/A-1 ARATHON PETE COM 56585A102 129,619 8,354 6.89 21,365 20.86 0.0380
2025-08-13 2025-06-30 13F ARATHON PETE COM 56585A102 111,344 -9,921 16,553 0.0191
2025-05-12 2025-03-31 13F MARATHON PETE COM 56585A102 121,265 27,859 29.83 17,678 46.29 0.0394
2025-06-06 2024-12-31 13F/A-1 MARATHON PETE COM 56585A102 93,406 -21,058 -18.40 12,084 -35.23 0.0271
2025-02-07 2024-12-31 13F MARATHON PETE COM 56585A102 102,991 -11,473 15,203 0.0388
2024-11-13 2024-09-30 13F MARATHON PETE COM 56585A102 114,464 -13,009 -10.21 18,656 -15.68 0.0421
2024-08-13 2024-06-30 13F MARATHON PETE COM 56585A102 127,473 -4,100 -3.12 22,125 -16.65 0.0523
2024-05-10 2024-03-31 13F MARATHON PETE COM 56585A102 131,573 -67,681 -33.97 26,544 -10.24 0.0593
2024-02-12 2023-12-31 13F MARATHON PETE COM 56585A102 199,254 -70,652 -26.18 29,572 -27.62 0.0517
2023-11-13 2023-09-30 13F MARATHON PETE COM 56585A102 269,906 42,704 18.80 40,856 53.81 0.0604
2023-08-21 2023-06-30 13F/A-1 MARATHON PETE COM 56585A102 227,202 -3,569 -1.55 26,564 -14.07 0.0477
2023-08-10 2023-06-30 13F MARATHON PETE COM 56585A102 841,038 610,267 25,950 0.0070
2023-05-12 2023-03-31 13F MARATHON PETE COM 56585A102 230,771 7,028 3.14 30,914 18.69 0.0582
2023-02-10 2022-12-31 13F MARATHON PETE COM 56585A102 223,743 852 0.38 26,046 17.62 0.0527
2022-11-14 2022-09-30 13F MARATHON PETE COM 56585A102 222,891 -7,964 -3.45 22,144 16.05 0.0506
2022-08-10 2022-06-30 13F MARATHON PETE COM 56585A102 230,855 -62,924 -21.42 19,081 -10.75 0.0421
2022-05-04 2022-03-31 13F MARATHON PETE COM 56585A102 293,779 87,893 42.69 21,379 61.53 0.0415
2022-02-03 2021-12-31 13F MARATHON PETE COM 56585A102 205,886 38,096 22.70 13,235 27.32 0.0250
2021-11-05 2021-09-30 13F MARATHON PETE COM 56585A102 167,790 1,859 1.12 10,395 3.57 0.0217
2021-08-02 2021-06-30 13F MARATHON PETE COM 56585A102 165,931 10,150 6.52 10,037 20.02 0.0217
2021-05-13 2021-03-31 13F MARATHON PETE COM 56585A102 155,781 -1,649 -1.05 8,363 28.44 0.0201
2021-02-10 2020-12-31 13F MARATHON PETE COM 56585A102 157,430 -36,845 -18.97 6,511 12.59 0.0174
2020-11-12 2020-09-30 13F MARATHON PETE COM 56585A102 194,275 -23,740 -10.89 5,783 -29.04 0.0173
2020-08-14 2020-06-30 13F MARATHON PETE COM 56585A102 218,015 21,848 11.14 8,150 78.88 0.0274
2020-05-18 2020-03-31 13F MARATHON PETE COM 56585A102 196,167 196,167 4,556 0.0187
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2020-08-14 2020-06-30 13F MARATHON PETE CORP CALL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-05-18 2020-03-31 13F MARATHON PETE CORP CALL COM Call 10 3 n/a n/a n/a
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.