Mary Barra and Doug McMillon

Mary Barra and Doug McMillon are prominent American business leaders whose careers have shaped two major industries: automotive manufacturing and retail. Barra has led General Motors through major changes in vehicle technology, electrification and software, while McMillon spent decades rising through Walmart before retiring as its CEO in January 2026. Both built their reputations through long-term leadership and business experience rather than celebrity status. Comparing their backgrounds, estimated wealth, education and family lives offers a closer look at their journeys to the top.

Mary Barra and Doug McMillon Quick Bio

Key Information	Mary Barra	Doug McMillon
Full Name	Mary Teresa Barra, born Mary Teresa Mäkelä	Carl Douglas McMillon
Date of Birth	December 24, 1961	October 17, 1966
Net Worth	Estimated at around $90 million; a third-party estimate, not an audited personal financial statement	Estimated at around $300 million in some published estimates; figures vary and are not independently confirmed
Height	Unverified; reliable public confirmation is limited	Unverified; reliable public confirmation is limited
Age	64 years old as of October 2026	59 years old as of October 2026
Birthplace	Royal Oak, Michigan, United States	Memphis, Tennessee, United States
Nationality	American	American
Profession	Business executive and automotive industry leader	Business executive and retail industry leader
Famous For	Becoming the first woman to lead one of Detroit’s traditional Big Three automakers as CEO of General Motors	Serving as Walmart CEO from 2014 until his retirement in January 2026
Nickname	Mary Barra	Doug McMillon
Parents	Ray Mäkelä and Eva Mäkelä	Morris McMillon and Laura McMillon
Siblings	Has a brother, Paul Mäkelä	Grew up as the eldest of three children; detailed sibling information is not widely documented
Education	Earned a bachelor’s degree in electrical engineering from the General Motors Institute, now Kettering University, in 1985; completed an MBA at Stanford Graduate School of Business in 1990	Earned a bachelor’s degree in business administration from the University of Arkansas in 1989 and an MBA from the University of Tulsa in 1991
Marital Status	Married	Married
Spouse	Anthony Barra	Shelley McMillon
Children	Two children	Two sons, Blake and Spencer
Family Life	Maintains a relatively private family life while balancing senior executive responsibilities	Keeps his family life relatively private and has spoken about the importance of values, teamwork and leadership
Career Beginnings	Joined General Motors in 1980 as a co-op student while studying engineering	Began working at Walmart in 1984 as a teenager, unloading trucks at a distribution centre
Major Career Breakthrough	Became GM’s CEO in January 2014 and later its board chair in January 2016	Became president and CEO of Walmart in February 2014 after leading Sam’s Club and Walmart International
Current or Most Recent Leadership Role	Chair and CEO of General Motors	Retired as Walmart CEO on January 31, 2026
Company	General Motors (GM)	Walmart Inc.
Industry	Automotive manufacturing, mobility, vehicle technology and electric vehicles	Retail, grocery, e-commerce and global supply-chain operations
Major Responsibilities	Oversees corporate strategy, vehicle development, manufacturing, technology and the company’s transition towards electrification	Led Walmart’s global operations, digital commerce development, workforce strategy and retail growth during his tenure
Leadership Style	Known for an engineering background and an emphasis on product development, technology and organisational change	Known for his hands-on retail experience and progression through different levels of Walmart’s business
Key Business Milestones	Progressed through engineering, manufacturing, human resources, product development and executive leadership roles at GM	Led Sam’s Club from 2005 to 2009, Walmart International from 2009 to 2013, and Walmart as CEO from 2014 to 2026
Major Achievements	Became a pioneering female leader in the automotive industry and helped steer GM’s investment in electric vehicles and software	Oversaw Walmart’s expansion in e-commerce and technology and initiatives involving employee wages, education and workplace benefits
Board Positions and Affiliations	Has served on the boards of organisations including The Walt Disney Company and Business Roundtable	Has served on business organisations and boards, including the Business Roundtable and the Consumer Goods Forum
Awards and Recognition	Recognised for executive leadership and influence in the automotive sector	Recognised for retail leadership and his long career progressing from hourly associate to CEO
Hobbies and Interests	Personal hobbies are not consistently documented in reliable public biographies	Enjoys sports, particularly basketball; other personal hobbies are not comprehensively documented
Hair Colour	Unverified	Unverified
Eye Colour	Unverified	Unverified
Instagram	No personal account verified here	A professional social-media presence has been associated with him, but the official status of any specific Instagram handle is unverified
Professional Legacy	Helped bring greater visibility to women in automotive leadership while guiding GM through a period of technological change	Represents a notable corporate career path, moving from a warehouse role to the leadership of one of the world’s largest retailers
Main Source of Wealth	Executive compensation, investments and company-related stock holdings	Executive compensation, investments and Walmart-related stock holdings
Financial Comparison	Her estimated wealth is substantially lower than some published estimates for McMillon, although both figures remain estimates	Some published estimates place his wealth above Barra’s, but the difference should be treated cautiously because personal financial details are not fully public
Key Difference	Built her career within the automotive sector and has led GM as chair and CEO	Built his career in retail and led Walmart before retiring in 2026
Years Active	General Motors career began in 1980; executive leadership continues	Walmart career began in 1984; retired as CEO in January 2026
Overall Significance	A leading figure in the modern automotive industry and a prominent woman in corporate leadership	A long-serving retail executive known for his rise through Walmart’s operations and senior management