McMillon has worked for Walmart throughout his career. He took on his first role with the company as a teenager in 1984. After high school, McMillon attended
University of Arkansas, where he graduated with a
bachelor's degree in 1989. The next year, as McMillon studied for a
Master of Business Administration (MBA) from
University of Tulsa, he called Walmart and told an executive he was interested in training to become a buyer when he completed his studies. Originally in charge of buying fishing tackle, He later worked as a general merchandise manager for Walmart's wholesale store division Sam's Club before taking an executive role at Walmart, overseeing toys, electronics, and sporting goods, among other areas. Under McMillon, the wholesaler emphasized marketing to small business customers. replacing
Mike Duke, who was promoted to CEO of Walmart Stores, Inc. One area of particular importance to McMillon was integrating Walmart's "everyday low prices" model to these international markets. During McMillon's tenure, Walmart International's sales growth outpaced Walmart US and grew to 29 percent of total sales company-wide. When Walmart announced it would move him to head Walmart Stores, Inc. in late 2013, Walmart International operated 6,300 stores in 26 countries.
CEO of Walmart, Inc. (2014–2026) on the
COVID-19 pandemic in April 2020 Walmart announced on November 25, 2013, that McMillon would immediately join the company's board of directors, and would replace
Mike Duke as Walmart CEO effective on February 1, 2014, becoming the company's fifth chief executive. as well as a better footing in a changing retail market. In February 2015, McMillon announced Walmart would invest an additional in higher associate wages, benefits and training, including raising its lowest wage to an hour in 2015 and an hour for 2016. The action affected 40 percent of the company's 1.4million US workers. In January 2016, McMillon announced raises for the majority of its workers, free basic short-term disability for full-time workers and a revised paid time off program. As such he announced in 2015 that Walmart would invest on its online operations. Another goal is to improve the company's environmental sustainability and eliminate waste across the company. In 2014, Walmart began rolling out an initiative to replace lighting in its stores in the US, UK, Latin America and Asia with LED lights for energy efficiency. At the
Davos World Economic Forum in January 2016, McMillon said Walmart would press three of its main goals: supply the company with renewable energy, eliminate waste and promote sustainably packaged goods. As CEO, McMillon sought to make a "positive difference" in other issues. McMillon said the bill "threatens to undermine the spirit of inclusion present throughout the state of Arkansas and does not reflect the values we proudly uphold". McMillon altered Walmart's gun sales. He told
CNNMoney in an interview that Walmart's selection of firearms should be geared towards
hunters and
sports shooters. In August 2015, the company ceased sales of military-style
semiautomatic weapons. ExecRank ranked McMillon No.4 on its 2015 list of top CEOs for large companies. In December 2016, McMillon joined a business forum assembled by then president-elect
Donald Trump to provide strategic and policy advice on economic issues. In August 2017, McMillon wrote a rebuke of President Trump's response to the violent protests, despite Trump’s condemnation of alt-right protestors in
Charlottesville, Virginia in an email to all employees and on the internal company website viewable by the public. The statement said that Trump, "missed a critical opportunity to help bring our country together". A company spokesman said McMillon would continue to serve on a presidential advisory council on economic development. In September 2019, McMillon announced that the company would no longer sell ammunition used for handguns and military-style weapons. This policy update came as a result of the
mass shooting which took place at a Walmart in El Paso, Texas in August 2019. McMillon's actions to create a dialogue and take actions around the issue, set a new precedent for how corporations and their leaders address these matters. In 2023, McMillon's total compensation from Walmart was $27 million, or 976 times the median Walmart employee pay for that year. In November 2025, Walmart announced McMillon would retire as CEO in January 2026 after almost 12 years as CEO and over 40 years with the company. At the time of the announcement, McMillon had overseen a 400%+ rise in Walmart shares, equating to more than $576 billion in
market capitalization. ==Personal life==