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Phillips 66

Petroleum RefiningFounded 1917
Reviewed by Swet Parvadiya
Company data updated: October 2026

Leadership History

Phillips 66: CEO History

3 leaders · 2012 to present

Who is the CEO of Phillips 66?

Mark Lashier is the CEO of Phillips 66, in the role since 2022. The first chief executive was Greg Garland, from 2012.

Current CEO
Mark Lashier (since 2022)
First CEO
Greg Garland (2012)
Leaders documented
3
Founded
1917
NameRoleFromToYears in role
Mark LashierChairman and Chief Executive Officer2022Present4
Kevin MitchellExecutive Vice President and Chief Financial Officer2014Present12
Greg GarlandFormer Chairman and CEO2012202210
Who was CEO of Phillips 66 before Mark Lashier?
Greg Garland was CEO of Phillips 66 from 2012 to 2022, before Mark Lashier took over in 2022.

Company Overview

Phillips 66 is a downstream and midstream company: it does not drill for oil. It processes crude in refineries in the United States and at Humber in the UK, moves and fractionates NGLs, earns equity income from CPChem, and supplies branded fuel to retail sites. FY2025 sales were $132.376 billion and the company had about 12,600 employees at year-end 2025. The company is headquartered in Houston, Texas. Phillips 66 traces its origins to Phillips Petroleum Company founded in 1917 in Bartlesville, Oklahoma, by Frank and L.E. Phillips, before spinning off from ConocoPhillips in May 2012 to create an independent downstream energy and refining giant headquartered in Houston, Texas.

Mark Lashier

Chairman and Chief Executive Officer

2022 – Present

4 years (current)

Key Decisions & Impact

Lashier began his career as a research engineer at Phillips Petroleum, later served as CEO of Chevron Phillips Chemical (CPChem), returned to Phillips 66 as President and COO in 2021 and became CEO in July 2022. In 2025 he resisted Elliott Management's campaign to separate the Midstream business; shareholders elected two Elliott nominees to the board at the May 2025 annual meeting.

Legacy

Under Lashier, Phillips 66 bought out DCP Midstream (about $3.8 billion, 2023), Cenovus's 50% of WRB Refining ($1.4 billion, 2025) and EPIC NGL (about $2.2 billion, 2025), sold most of its European retail business and refocused growth spending on NGL infrastructure. In 2Q 2026 the company earned $3.847 billion and cut total debt to $20.6 billion.

Source →

Kevin Mitchell

Executive Vice President and Chief Financial Officer

2014 – Present

12 years (current)

Key Decisions & Impact

Oversees treasury, investor relations, financial planning, accounting, tax and corporate strategy and development.

Legacy

Leads the 2026 debt-reduction program; total debt fell to $20.6 billion at the end of 2Q 2026.

Source →

Greg Garland

Former Chairman and CEO

2012 – 2022

10 years

Key Decisions & Impact

Garland, a chemical engineer, previously served as Senior Vice President of Exploration and Production for the Americas at ConocoPhillips and as CEO of Chevron Phillips Chemical Company before leading Phillips 66 as CEO from its 2012 spin-off from ConocoPhillips through 2022.

Legacy

Garland led Phillips 66 through its first decade as a standalone company, including the formation and later buy-in of Phillips 66 Partners, before handing the CEO role to Mark Lashier in July 2022.

Source →

Challenges & Strategic Context

Phillips 66 faces refining-margin volatility, planned and unplanned refinery downtime, environmental regulation, renewable fuels overcapacity, commodity-price swings, and pressure to prove that its asset portfolio can earn strong returns through the energy transition.

Phillips 66 CEO and Leadership FAQ

Who is Mark Lashier and what is his leadership record as CEO of Phillips 66?

Mark Lashier has been CEO of Phillips 66 since July 2022 and also serves as chairman. A chemical engineer, he previously led CPChem and has overseen the DCP Midstream and WRB buy-ins and the 2025 sale of most European retail operations.

Who was Greg Garland and what was his foundational role as CEO from 2012 to 2022?

Greg Garland was Phillips 66's first chairman and CEO, leading the company from the 2012 spin-off until 2022, including creating and later buying in the Phillips 66 Partners MLP.

Who was Frank Phillips and what was his founding vision for Phillips Petroleum in 1917?

Frank Phillips, a well-known Oklahoma oil pioneer, co-founded Phillips Petroleum Company in 1917 with his brother L.E. Phillips. Frank built the company through early gas discoveries in the Osage Nation, pioneered high-octane aviation fuels, and created the well-known 'Phillips 66' brand.

Who was L.E. Phillips and what was his contribution to the company's early growth?

Lee Eldas (L.E.) Phillips served as co-founder and President of Phillips Petroleum Company, managing banking relationships, corporate finance, and land acquisition during the booming Oklahoma oil rushes of the 1920s.

Who are the key executive leaders managing Phillips 66 alongside Mark Lashier?

Kevin Mitchell is executive vice president and CFO; Sean Maher is vice president of investor relations and chief economist. See the company's corporate governance page for the full executive team.

What technical and executive background does CEO Mark Lashier bring to Phillips 66?

Mark Lashier holds a Bachelor's degree and Ph.D. in Chemical Engineering from Iowa State University. He spent over three decades within Phillips Petroleum and CPChem, serving as CEO of Chevron Phillips Chemical before becoming President and COO of Phillips 66 in 2021 and CEO in July 2022.

How did Greg Garland steer Phillips 66 through its first decade as an independent company?

As founding Chairman and CEO from 2012 to 2022, Greg Garland oversaw the operational separation from ConocoPhillips, simplified midstream MLPs into the parent company, expanded CPChem's Gulf Coast petrochemical complex, and returned over $30 billion to shareholders.

What operational excellence benchmarks has Mark Lashier instituted across refineries?

Mark Lashier launched a comprehensive company-wide business transformation initiative to reduce operating costs by $1.4 billion, optimize refinery utilization above 95%, and monetize non-core retail real estate assets.

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Content is for informational purposes only. Not financial advice. Data sourced from SEC filings, annual reports, and public records. See our full disclaimer and methodology.