12 Large-Cap Stocks Insiders Were Buying in Q1 2025 Before Trump’s Tariff Shockwave

9. Marathon Petroleum Corporation (NYSE:MPC)

Market cap: $41.84 billion

Marathon Petroleum Corporation (NYSE: MPC), based in Findlay, Ohio, is a leading U.S. energy company focused on refining, marketing, and transporting petroleum and renewable fuels. Operating through three segments—Refining & Marketing, Midstream, and Renewable Diesel—it produces transportation fuels, asphalt, petrochemicals, and renewable diesel for customers across the U.S. and internationally. Originally founded in 1887, Marathon became an independent company in 2011 following its separation from Marathon Oil.

In 2024, Marathon reported net income of $3.4 billion, or $10.08 per diluted share, a sharp decline from $9.7 billion, or $23.63 per share, in 2023. Adjusted net income for the year was $3.3 billion, or $9.51 per share, also down significantly from the prior year.

During the first quarter, two insiders, including the company’s chief commercial officer, bought $403,140 worth of Marathon shares at an average price of $134.21 per share. Since the beginning of the year, Marathon shares declined 3.73%, currently trading at $134.30 per share. Over the past 12 months, Marathon stock lost 32.56%.

Marathon is also one of the 14 most expensive stocks insiders are buying in March and one of the 10 best oil stocks to invest in according to billionaires.