Independent Advisor Alliance reports 60.73% decrease in ownership of MPC / Marathon Petroleum Corporation

Marathon Petroleum Corporation

MX ˙ BMV ˙ US56585A1025

Security	MX:MPC / Marathon Petroleum Corporation
Institution	Independent Advisor Alliance
Latest Disclosed Ownership	5,274 shares
Latest Disclosed Value	$ 1,287,825

On May 12, 2026 - Independent Advisor Alliance filed a 13F-HR form disclosing ownership of 5,274 shares of Marathon Petroleum Corporation (MX:MPC) valued at $1,287,825 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 13,431 shares of Marathon Petroleum Corporation. This represents a change in shares of -60.73% 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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-12	2026-03-31	13F	MARATHON PETE	COM	56585A102	5,274	-8,157	-60.73	1,288	-41.07	0.0138
2026-02-04	2025-12-31	13F	MARATHON PETE	COM	56585A102	13,431	-988	-6.85	2,184	-21.41	0.0530
2025-11-04	2025-09-30	13F	MARATHON PETE	COM	56585A102	14,419	7,604	111.58	2,779	145.71	0.0722
2025-08-11	2025-06-30	13F	MARATHON PETE	COM	56585A102	6,815	-1,233	-15.32	1,132	-3.50	0.0326
2025-05-12	2025-03-31	13F	MARATHON PETE	COM	56585A102	8,048	-1,204	-13.01	1,173	-9.15	0.0387
2025-02-07	2024-12-31	13F	MARATHON PETE	COM	56585A102	9,252	2,075	28.91	1,291	10.35	0.0171
2024-11-13	2024-09-30	13F	MARATHON PETE	COM	56585A102	7,177	-7,481	-51.04	1,169	-54.01	0.0426
2024-08-12	2024-06-30	13F	MARATHON PETE	COM	56585A102	14,658	1,243	9.27	2,543	-5.96	0.0871
2024-05-08	2024-03-31	13F	MARATHON PETE	COM	56585A102	13,415	6,250	87.23	2,703	154.52	0.0976
2024-02-08	2023-12-31	13F	MARATHON PETE	COM	56585A102	7,165	1,400	24.28	1,063	21.79	0.0383
2023-10-24	2023-09-30	13F	MARATHON PETE	COM	56585A102	5,765	-9,368	-61.90	872	-50.57	0.0395
2023-07-28	2023-06-30	13F	MARATHON PETE	COM	56585A102	15,133	83	0.55	1,764	-13.06	0.0777
2023-05-12	2023-03-31	13F	MARATHON PETE	COM	56585A102	15,050	15,050		2,029		0.0978
2023-02-13	2022-12-31	13F	MARATHON PETE	COM	56585A102	0	-4,767	-100.00	0	-100.00
2022-11-04	2022-09-30	13F	MARATHON PETE	COM	56585A102	4,767	-15,096	-76.00	474	-70.97	0.0276
2022-08-04	2022-06-30	13F	MARATHON PETE	COM	56585A102	19,863	15,072	314.59	1,633	298.29	0.0912
2022-05-06	2022-03-31	13F	MARATHON PETE	COM	56585A102	4,791	1,014	26.85	410	69.42	0.0197
2022-02-11	2021-12-31	13F	MARATHON PETE	COM	56585A102	3,777	-490	-11.48	242	-8.33	0.0119
2021-11-01	2021-09-30	13F	MARATHON PETE	COM	56585A102	4,267	-2,257	-34.60	264	-32.99	0.0147
2021-08-12	2021-06-30	13F	MARATHON PETE	COM	56585A102	6,524	1,253	23.77	394	39.72	0.0216
2021-05-14	2021-03-31	13F	MARATHON PETE	COM	56585A102	5,271	-198	-3.62	282	24.78	0.0167
2021-02-11	2020-12-31	13F	MARATHON PETE	COM	56585A102	5,469	5,469		226		0.0153
2020-11-04	2020-09-30	13F	MARATHON PETE	COM	56585A102	0	-12,429	-100.00	0	-100.00
2020-08-06	2020-06-30	13F	MARATHON PETE	COM	56585A102	12,429	12,429		465		0.0498
2020-05-14	2020-03-31	13F	MARATHON PETE	COM	56585A102	0	-6,608	-100.00	0	-100.00
2020-02-07	2019-12-31	13F	MARATHON PETE	COM	56585A102	6,608	2,023	44.12	398	42.65	0.0174
2019-11-12	2019-09-30	13F	MARATHON PETE	COM	56585A102	4,585	-1,910	-29.41	279	-23.14	0.0341
2019-08-12	2019-06-30	13F	MARATHON PETE	COM	56585A102	6,495	2	0.03	363	-6.68	0.0525
2019-05-07	2019-03-31	13F	MARATHON PETE	COM	56585A102	6,493	531	8.91	389	10.51	0.0547
2019-02-12	2018-12-31	13F	MARATHON PETE	COM	56585A102	5,962	-7,219	-54.77	352	-61.10	0.0623
2018-11-13	2018-09-30	13F	MARATHON PETE	COM	56585A102	13,181	1,299	10.93	905	30.03	0.1629
2018-08-08	2018-06-30	13F	MARATHON PETE	COM	56585A102	11,882	416	3.63	696	-14.60	0.1448
2018-05-15	2018-03-31	13F	MARATHON PETE	COM	56585A102	11,466	7,583	195.29	815	202.97	0.1817
2018-02-14	2017-12-31	13F	MARATHON PETE	COM	56585A102	3,883	3,883		269		0.0601
2017-05-09	2017-03-31	13F	MARATHON PETROLEUM	Common Stock	56585A102	0	-1,242	-100.00	0	-100.00
2017-02-15	2016-12-31	13F	MARATHON PETROLEUM	Common Stock	56585A102	1,242	1,242		61		0.0236

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.