HOUSTON--(BUSINESS WIRE)--Sep. 10, 2025-- Phillips 66 (NYSE:PSX) announced today that Sean Maher has been appointed vice president of investor relations and chief economist, effective Oct. 1. Maher succeeds Jeff Dietert, who has elected to retire after eight years of service with the company.

“We are pleased to have Sean step into this important role, bringing deep industry knowledge and extensive finance experience that will strengthen our engagement with the investment community,” said Kevin Mitchell, executive vice president and chief financial officer. “We thank Jeff for his many contributions as a trusted voice to the investment community, and we wish him all the best in retirement.”

Maher currently serves as Phillips 66’s chief economist, where he leads the company’s global fundamental outlook and price forecasting. He has nearly 30 years of experience in energy finance and investment. Before joining the company in 2024, Maher held senior roles at Morgan Stanley, where he launched and led coverage of midstream and integrated natural gas companies and was a senior member of its integrated oil and refining franchise. He has also served as partner and senior portfolio manager for an energy equity fund and co-founded Third Gear Investments. In addition, Maher has served on public company boards and is active in several community organizations.

Dietert joined Phillips 66 in 2017 after a successful career in energy equity research. He played a key role in evolving the company’s investor relations function, strengthening relationships with analysts and shareholders and enhancing Phillips 66’s reputation in the financial markets.

About Phillips 66

Phillips 66 (NYSE: PSX) is a leading integrated downstream energy provider that manufactures, transports and markets products that drive the global economy. The company’s portfolio includes Midstream, Chemicals, Refining, Marketing and Specialties, and Renewable Fuels businesses. Headquartered in Houston, Phillips 66 has employees around the globe who are committed to safely and reliably providing energy and improving lives while pursuing a lower-carbon future. For more information, visit phillips66.com or follow @Phillips66Co on LinkedIn.

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Jeff Dietert (investors)
832-765-2297
jeff.dietert@p66.com

Owen Simpson (investors)
832-765-2297
owen.simpson@p66.com

Al Ortiz (media)
855-841-2368
al.s.ortiz@p66.com

Source: Phillips 66