CountryMark

Oil and GasIndiana, United States201-500 Employees

CountryMark is an American-owned oil and gas company and a farmer-owned cooperative since 1919, engaged in exploration, production, refining and marketing. Its operations include a Mt. Vernon, Indiana refinery, a 238-mile private pipeline, and terminal blending technology to support biodiesel and ethanol blended fuels. The company markets fuels, lubricants (Advantage Lubricants), and API-certified TerraCair Diesel Exhaust Fluid, and sells through more than 100 CountryMark-branded fueling stations across the Midwest. CountryMark's upstream business manages about 1,400 oil wells across six states, producing roughly 2,500 barrels of oil per day, supported by a team of petroleum professionals. In 2025, CountryMark announced an investment exceeding $100 million to upgrade the Mount Vernon refinery to expand renewable diesel production; the company is headquartered in Indianapolis, Indiana, with 201-500 employees and revenues in the range of $500 million to $1 billion.

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