Silicon Valley tends to tolerate a certain amount of founder hyperbole when pitching investors, often dismissing it as part of selling a vision. However, some choices cross the line and can lead to jail time for the founders and scandal for their investors.
Case in point is Joseph Sanberg, whose once-high-profile fintech startup Aspiration Partners was backed by a list of tech celebrities, including former Microsoft CEO and current Clippers owner Steve Ballmer. In August 2025, Sandberg pleaded guilty to two counts of wire fraud and defrauding multiple investors and lenders, according to the US Department of Justice he said in a press release. Each charge carries a maximum sentence of 20 years in prison.
Before the sentencing, which is scheduled for Monday, the victims were asked to describe their experience with Sandberg to the judge. Ballmer did it publicly. Ballmer’s lawyers said in the letter that he lost money, was defamed and that the NBA is investigating the allegations coming from the association.
Sanberg co-founded green fintech startup Aspiration Partners, which offered what it called sustainable banking services, including credit cards and investment products that avoided fossil fuels. The startup promised to “automatically plant trees with every card purchase.” In 2021, it announced plans to go public through a SPAC merger worth $2.3 billionalthough this transaction ever took place.
The DOJ alleged that Aspiration booked and recognized revenue from entities owned by Sanberg, which made the company appear as if it had a steady stream of customers and revenue that it actually did not. The agency further alleged that he defrauded investors by showing them a fabricated letter from Aspiration’s audit committee that said the company had $250 million in cash and cash equivalents when it had less than $1 million. The Justice Department alleged that Sanberg, along with a board member who also pleaded guilty, falsified financial records to obtain $145 million in loans.
When Ballmer shared his letter in Xasking the judge to consider the harm done to him at sentencing, he wrote: “I was cheated and I feel stupid about it. Everyone who believed in Aspiration, including employees, customers and investors, was also cheated. Everyone is still counting their losses.”
The letter says Ballmer invested a total of $60 million in the company and lost it all. Ballmer was not only an investor, he had contracted with Aspiration to provide carbon offset programs for the Clippers and their stadium. Aspiration also became a major sponsor of the Clippers.
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The billionaire said in the letter that not only did he lose that money, but his reputation was also negatively affected. He used the letter to refuse to report a multi-part series of famous sports podcast Pablo Torre Finds Out which delved into the relationship between the Clippers and Aspiration. The podcast made allegations that Aspiration helped bypass the salary cap for a star player on the Clippers. Ballmer’s lawyers called those allegations “a misunderstanding or deliberate disregard of the facts,” in the letter.
Ballmer’s letter also said that as a result of his association with that company, his podcast and other public attention, he has been named in lawsuits. Meanwhile, the NBA said in its own letter regarding Sandberg’s sentencing that it is investigating the salary cap allegations, and Sandberg provided evidence, ESPN reported.
While the basketball world is involved in all of these downstream developments, the message founders can take from this is clear: If someone fabricates financial documents to raise capital, the result will most likely be jail time.
The Ballmer Group did not respond to our request for comment.
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