Mark Walter FBI probe: What Dodgers owner's case means
Billionaire Mark Walter, the Guggenheim Partners chief who owns the Los Angeles Dodgers and a controlling stake in the Lakers, is under federal scrutiny after the FBI seized his phone and laptop last September. Prosecutors are examining possible loan fraud and related-party disclosures at insurers tied to his empire, though no charges have been announced.
The story broke across major outlets this week, linking a Chicago airport device seizure to a wider Manhattan probe of Walter’s insurance and asset-management businesses. For readers who follow wealth hacks and passive income, the case is a reminder that opaque related-party lending can surface years later as regulatory and criminal risk.
Key Takeaways
- FBI agents seized Mark Walter’s mobile phone and laptop on Sept. 18 during a court-authorized search on a private plane at Chicago Midway International Airport.
- Federal prosecutors in Manhattan are examining potential financial improprieties at Guggenheim Partners and at two Walter-linked insurers, Delaware Life and Clear Spring.
- Reporting centers on roughly $16 billion in loans that allegedly were not properly disclosed as related-party transactions, plus questions about revenue figures shared with outside parties.
- TWG Global says Walter and the firm acted in good faith, are cooperating, and expect a favorable outcome; probes can end without charges.
What happened to Mark Walter’s phone and devices?
According to Bloomberg Law, federal agents seized the phone and computer of Dodgers owner Mark Walter last September as part of a wide-ranging probe into his businesses’ financial dealings. People familiar with the matter said the FBI executed a search warrant aboard a private plane at a Chicago airport where Walter was traveling.
The FBI’s Chicago field office confirmed it carried out a court-authorized search for a mobile phone and laptop on an aircraft at Midway International Airport on Sept. 18, but declined further comment. Sources did not say where the devices are now or what data investigators sought. Bloomberg noted that seizing electronics from a high-profile executive is a significant step—and that prosecutor-led probes can conclude with no charges.
GoLocalProv, covering Walter as a part-time Newport, Rhode Island resident who bought the historic Clarendon Court estate for $30 million in 2021, reported the same core facts drawn from Bloomberg’s account. The search warrant was described as one of several executed that September.
Why are prosecutors looking at Mark Walter’s financial empire?
Federal prosecutors in Manhattan have been investigating potential financial improprieties at two of Walter’s insurance companies and at Guggenheim Partners, the Chicago investment firm he leads, Bloomberg has reported. People familiar with the matter said warrants tied into scrutiny of Guggenheim’s roughly $362 billion money-management division and whether revenue information shared with outside parties was accurate.
An early focus, those people said, was a deal TWG Global—Walter’s holding company—struck with Mubadala Capital, an arm of an Abu Dhabi sovereign wealth fund. In April 2025, the companies announced that Mubadala Capital would anchor a $10 billion syndicated investment in TWG. Prosecutors examined whether Mubadala Capital had been misled about valuations; it is unclear whether that line of inquiry is still active. A Mubadala Capital representative declined to comment.
More recently, attention has shifted to Delaware Life Insurance Co. and Clear Spring Life and Annuity Co. In February, the companies said they received grand jury subpoenas about private credit investments that were more intertwined with other parts of Walter’s business than previously disclosed.
The Los Angeles Times, citing the Wall Street Journal, reported that the U.S. Attorney’s Office and securities regulators are probing Walter’s insurance empire over about $16 billion in loans made to companies tied to him or TWG that allegedly were not disclosed as related-party transactions as required. Related-party reporting is meant to limit conflicts and protect policyholders.
The Times also reported that the current probe followed an internal whistleblower complaint about how Guggenheim Investments booked revenue linked to insurers, and that the inquiry later expanded to those loans, which were described as passing through a third party before reaching Walter- or TWG-tied entities. Authorities are trying to determine whether that amounted to fraud, according to an unnamed source cited in that coverage.
How does this connect to the Dodgers, Lakers, and insurers?
Walter, about 66 and with a net worth near $16 billion on the Bloomberg Billionaires Index, is known for stakes in MLB’s Dodgers, the NBA’s Lakers, and England’s Chelsea Football Club. Last year he and TWG acquired a controlling Lakers stake at a $10 billion valuation. He previously led a group—including Todd Boehly and Magic Johnson—that bought the Dodgers for $2.15 billion in 2012.
The Los Angeles Times has reported that more than $1 billion used to buy the Dodgers came from insurance companies managed by Guggenheim and controlled by Walter. State insurance regulators reviewed that purchase in 2014 and found no irregularities, the Journal reported in 2020, according to the Times.
Delaware Life and Clear Spring disclosed the investigations in June regulatory filings. Delaware Life had earlier said affiliated investments were about $1 billion, or roughly 3% of its portfolio, then raised that figure to $16 billion. Executives told one rating firm they were unaware the loans went to Walter-tied entities, the Journal reported via the Times. The Securities and Exchange Commission is conducting a parallel investigation.
After an internal review, Delaware Life said it would restructure some related-party loans, fix internal-control gaps, and moderate its business plan, per S&P Global. S&P kept the insurer’s “A-” ratings but cut the outlook to negative over possible higher credit risk. Group 1001, the insurers’ parent, said capital and liquidity remain strong and financial strength ratings are unchanged.
What has Mark Walter’s camp said so far?
TWG Global told Bloomberg: “Mark Walter and TWG have always acted in good faith, and those who have done business with Mark know him as honest and straightforward.” The firm said it is cooperating and is “confident these matters will be resolved favorably.” Guggenheim representatives did not respond to Bloomberg’s requests for comment. The Dodgers, TWG, and Guggenheim did not immediately respond to the Los Angeles Times.
Separately, Walter appeared at a White House Rose Garden event last week celebrating the Dodgers’ World Series title, presenting President Donald Trump with a commemorative jersey numbered “47” and a World Series ring. Trump praised the team’s ownership and called Walter a friend, Bloomberg reported.
As of the latest reporting, no charges have been filed. Investigations by prosecutors and securities regulators often result in no action. Still, the combination of device seizures, grand jury subpoenas, revised related-party figures, and parallel SEC scrutiny marks a serious escalation for one of sports’ most powerful owners—and for anyone tracking how insurance capital and opaque private credit can fund big-ticket deals.