Marathon Petroleum Corporation
US ˙ NYSE ˙ US56585A1025

SecurityMPC / Marathon Petroleum Corporation
InstitutionBoothbay Fund Management, Llc
Latest Disclosed Ownership5,059 shares
Latest Disclosed Value $ 1,235,307
Boothbay Fund Management, Llc ownership in MPC / Marathon Petroleum Corporation

On May 15, 2026 - Boothbay Fund Management, Llc filed a 13F-HR form disclosing ownership of 5,059 shares of Marathon Petroleum Corporation (US:MPC) valued at $1,235,307 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 10,236 shares of Marathon Petroleum Corporation. This represents a change in shares of -50.58% during the quarter. The current value of the position is $1,351,815 USD.

Boothbay Fund Management, Llc has a history of taking positions in derivatives of the underlying security (MPC) in the form of stock options.

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.

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 5,059 -5,177 -50.58 1,235 -25.78 0.0160
2026-02-17 2025-12-31 13F MARATHON PETE COM 56585A102 10,236 4,330 73.32 1,665 46.22 0.0248
2025-11-14 2025-09-30 13F MARATHON PETE COM 56585A102 5,906 -3,577 -37.72 1,138 -27.75 0.0166
2025-08-14 2025-06-30 13F MARATHON PETE COM 56585A102 9,483 -3,931 -29.31 1,575 -19.40 0.0306
2025-05-15 2025-03-31 13F MARATHON PETE COM 56585A102 13,414 13,414 1,954 0.0515
2023-05-15 2023-03-31 13F MARATHON PETE COM 56585A102 0 -2,419 -100.00 0 -100.00
2023-02-14 2022-12-31 13F MARATHON PETE COM 56585A102 2,419 2,419 282 0.0065
2022-11-14 2022-09-30 13F MARATHON PETE COM 56585A102 0 -4,224 -100.00 0 -100.00
2022-08-15 2022-06-30 13F MARATHON PETE COM 56585A102 4,224 4,224 347 0.0091
2021-11-15 2021-09-30 13F MARATHON PETE COM 56585A102 0 -44,321 -100.00 0 -100.00
2021-08-17 2021-06-30 13F/A-1 MARATHON PETE COM 56585A102 44,321 44,321 2,678 0.0860
2021-08-16 2021-06-30 13F MARATHON PETE COM 56585A102 44,321 44,321 2,678 0.0842
2019-08-14 2019-06-30 13F MARATHON PETE COM 56585A102 0 -6,949 -100.00 0 -100.00
2019-05-15 2019-03-31 13F MARATHON PETE COM 56585A102 6,949 -16,631 -70.53 416 -70.09 0.0403
2019-02-14 2018-12-31 13F MARATHON PETE COM 56585A102 23,580 20,499 665.34 1,391 465.45 0.2027
2018-11-14 2018-09-30 13F MARATHON PETE COM 56585A102 3,081 3,081 -86.93 246 -82.31 0.0243
2018-05-14 2018-03-31 13F MARATHON PETE COM 56585A102 0 -5,202 -100.00 0 -100.00
2018-02-14 2017-12-31 13F MARATHON PETE COM 56585A102 5,202 -3,337 -39.08 343 -28.39 0.0502
2017-11-14 2017-09-30 13F MARATHON PETE COM 56585A102 8,539 -449 -5.00 479 1.91 0.0796
2017-08-14 2017-06-30 13F MARATHON PETE COM 56585A102 8,988 -494 -5.21 470 -1.88 0.0977
2017-05-15 2017-03-31 13F MARATHON PETE COM 56585A102 9,482 -698 -6.86 479 -6.63 0.0893
2017-07-18 2016-12-31 13F/A-2 MARATHON PETE COM 56585A102 10,180 -2,186 -17.68 513 7.10 0.1168
2017-02-16 2016-12-31 13F/A-1 MARATHON PETE COM 56585A102 10,180 0 513 0.1267
2017-02-15 2016-12-31 13F MARATHON PETE COM 56585A102 10,180 513
2016-11-14 2016-09-30 13F Marathon Petroleum EQUITIES 56585A102 12,366 12,366 1 0.1561
Disclosed Put 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
(%)
2021-11-15 2021-09-30 13F MARATHON PETE COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-17 2021-06-30 13F/A MARATHON PETE COM Put 44,100 2,665 n/a n/a n/a
2021-08-16 2021-06-30 13F MARATHON PETE COM Put 44,100 2,665 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.