On October 21 2025, Arbor Energy announced a $55 million Series A financing round, with Marathon Petroleum Corporation listed as a participant. The round was co‑led by Lowercarbon Capital and Voyager Ventures, and also included Gigascale Capital as an investor. The capital will fund Arbor’s 1 MW pilot and support the development of its 25 MW commercial product, HALCYON.
Marathon Petroleum’s involvement signals a strategic push into clean power, complementing its existing renewable diesel initiatives. By taking a stake in Arbor Energy, MPC gains early access to emerging renewable technologies and aligns its portfolio with broader sustainability goals. The $55 million investment, while modest relative to MPC’s capital base, represents a meaningful entry into the clean‑energy sector.
Although the investment is small compared to MPC’s overall scale, it positions the company to benefit from future growth in clean‑energy markets and supports its long‑term value‑creation strategy. The partnership may also create synergies with MPC’s renewable diesel operations and enhance its renewable portfolio. The move underscores MPC’s commitment to diversifying its energy mix and pursuing sustainable growth.
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