MPC vs BX Comparison

Marathon Petroleum is a leading integrated downstream and midstream energy company that operates 13 refineries in the Gulf Coast, midcontinent, and West Coast regions of the United States with an aggregate crude oil refining capacity of 3.0 million barrels per day. The company is one of the largest producers of renewable diesel in the US; its Dickinson, North Dakota, facility has the capacity to produce 184 million gallons per year, and its Martinez, California, joint venture facility (a 50/50 partnership with Neste) reached its full capacity of 730 million gallons per year in late 2024. Marathon also owns the general partner and approximately 64% of MPLX LP, a large-cap master limited partnership that owns and operates midstream energy infrastructure and logistics assets.

Blackstone is the world's largest alternative-asset manager with $1.346 trillion in total assets under management, including $961.6 billion in fee-earning assets under management, at the end of June 2026. The company operates with scale in each of its major product lines: private equity (28% of fee-earning AUM and 35% of base management fees), real estate/real assets (29% and 32%), credit and insurance (33% and 25%), and other alternatives (10% and 8%). While the firm primarily serves institutional investors (84% of AUM), it also caters to clients in the high-net-worth channel (16%). Blackstone operates through 25 offices in the Americas (8), Europe and the Middle East (9), and the Asia-Pacific region (8).