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Mark Richard Walter (born January 1, 1960) is an American businessman, philanthropist, and the chief executive officer of Guggenheim Partners, a privately held global financial services firm with more than $345 billion in assets under management. He is also the CEO and co-chairman of TWG Global, an American multinational holding company.
Walter is best known for his investments in professional sports. He is the owner and chairman of Major League Baseball's Los Angeles Dodgers, the National Basketball Association's Los Angeles Lakers, the Women's National Basketball Association's Los Angeles Sparks, the motorsports organization Andretti Global, and the Professional Women's Hockey League (PWHL). In addition, he owns 12.7% of BlueCo, a holding company that controls Premier League club Chelsea, Ligue 1 club RC Strasbourg, and part of the Billie Jean King Cup.
Walter attended Creighton University, where he studied accounting and graduated with a bachelor's degree in business in 1982. He graduated from Northwestern University School of Law in 1985.
In May 2024, Walter co-founded TWG Global and is its CEO, co-chairman, and 21% owner. He is the controlling shareholder of Delaware Life Holdings, LLC, and serves on the board of EquiTrust Life.
Walter has a personal stake in Beyond Meat. In addition, in 2021, it was reported that Walter had purchased numerous commercial and historic buildings in Crested Butte, Colorado, where his family frequently takes vacations.
In September 2025, the Bloomberg Billionaires Index estimated that he had a net worth of $13.3 billion.
Guggenheim's investments in sports have been questioned by industry commentators as riskier investments than insurance. After insurers reportedly contributed at least $300 million to the Dodgers' bid, government regulators investigated the arrangement but declined to take further action.
Walter appointed Stan Kasten to run the team. Under Walter, Kasten, and president of baseball operations Andrew Friedman, the team became baseball's "most perennially competitive team" and won the World Series in 2020 and 2024. Less than a year after Guggenheim bought the team, the Dodgers signed a television deal that increased their payroll.
In 2014, Walter joined David Geffen, Oprah Winfrey, and Larry Ellison's unsuccessful bid for the Los Angeles Clippers, which eventually went to Steve Ballmer.
Since 2014, Walter and Magic Johnson have led the ownership group for the Los Angeles Sparks, Sparks LA Sports, which also includes Dodgers partners Stan Kasten, Todd Boehly, Bobby Patton, and Eric Holoman. He has credited Johnson with giving him the idea to "save the Sparks" and to keep them in Los Angeles.
In 2021, Walter and Boehly acquired a 27% stake in the Los Angeles Lakers from Philip Anschutz, the principal owner of the Los Angeles Kings and a stakeholder in Crypto.com Arena, where both the Lakers and Kings play. Walter had previously led a consortium that bid for Anschutz Entertainment Group, though Anschutz ultimately decided to keep the company.
On June 18, 2025, Walter agreed to buy majority control of the team from the Jerry Buss at a $10 billion valuation. The Los Angeles Times reported that TWG Global would also be involved in the purchase.
Walter invested in the league and appointed his Dodgers partner Stan Kasten to oversee the league's business operations, which began play in 2024. The Mark Walter Group owns the inaugural six teams. The league's Walter Cup is named after Walter and his wife.
Walter was an avid fan of the Chicago Cubs growing up.
In 2011, Walter made a $30,800 contribution to the Democratic National Committee, as well as a $5,000 contribution to Obama for America.
Walter and his wife invest together in numerous philanthropic causes, including the White Oak Conservation.
In 2014, Walter contributed $40 million to the Northwestern University School of Law (now the Pritzker School of Law), from where he had earned his law degree, and endowed a law scholarship with his wife in 2015.
Walter leads the Los Angeles Dodgers Foundation, which is committed to promoting education and health in the greater Los Angeles community. He donated $50 million at the start of the 2024 season and an additional $50 million when the Dodgers qualified for the World Series.
Walter collaborated with Billie Jean King to create the Professional Women's Hockey League (PWHL), leading to its inaugural season in 2023-24. In October 2024, he was awarded the Billie Jean King Leadership Award for his role in starting the league, and pledged $5.5 million to the Women's Sports Foundation.
In 2025, he became a leader of LA Rises, a fundraising group assigned by California Governor Gavin Newsom to support rebuilding after the area's wildfires early in the year, and organized the first $100 million donation.
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