Silicon Valley tends to tolerate a certain amount of founder exaggeration when pitching investors, often dismissing it as part of selling a vision. But some choices cross the line and can lead to jail time for founders and scandal for their investors. This also touches on aspects of startup.

A case in point is Joseph Sanberg, whose once high-flying fintech startup Aspiration Partners was backed by a roster of tech celebrities, including former Microsoft CEO and current Clippers owner Steve Ballmer. In August 2025, Sanberg pleaded guilty to two counts of wire fraud and defrauding multiple investors and lenders, the U.S. Department of Justice noted in a press release. Each count carries a maximum sentence of 20 years in prison.

Ahead of sentencing, which is scheduled for Monday, victims were invited to describe their experience with Sanberg to the judge. Ballmer did so, and publicly. Ballmer’s lawyers commented in the letter that he has lost finances, been vilified, and that the NBA is investigating allegations stemming from the association.

Sanberg co-founded green fintech startup Aspiration Partners, which offered what it called sustainable banking services like credit cards and investment products that avoided fossil fuels. The startup promised to “automatically plant trees with every card purchase.” In 2021, it stated plans to go public via a SPAC merger at a value of $2.3 billion, though that transaction never took place.

The DOJ alleged that Aspiration booked and recognized revenue from entities held by Sanberg, who made the firm appear as if it had a steady stream of customers and revenue that it didn’t actually have. The agency further alleged he defrauded investors by showing them a fabricated letter from Aspiration’s audit committee that remarked the corporation had $250 million in available cash and equivalents when it had less than $1 million. The DOJ 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 on X, asking the judge to consider the harm done to him in sentencing, he wrote, “I was duped and feel silly about that. Everyone who believed in Aspiration, including employees, customers and investors, was also duped. Everyone is still tallying the losses.”

Five years ago, I invested in Aspiration, a firm focused on environmental sustainability, a cause deeply essential to me and my family. I also bought carbon credits and trees through the corporation to reduce the carbon footprint of the Clippers, Intuit Dome, the Kia Forum and all…

The letter says that Ballmer invested a total of $60 million in the corporation, and lost all of it. Ballmer was not only an investor, but had contracted with Aspiration to provide carbon-offsetting programs for the Clippers and its stadium. Aspiration also became a major Clippers sponsor.

Meet your next investor or portfolio startup at Disrupt

Your next round. Your next hire. Your next breakout opportunity. Find it at TechCrunch Disrupt 2026, where 10,000+ founders, investors, and tech leaders gather for three days of 250+ tactical sessions, powerful introductions, and market-defining innovation. Register now to , where 10,000+ founders, investors, and tech leaders gather for three days of 250+ tactical sessions, powerful introductions, and market-defining innovation. Register now to save up to $410.

The billionaire mentioned in the letter that not only did he lose that funds, his reputation was negatively affected. He used the letter to deny the reporting of a multi-part series from famed sports podcast Pablo Torre Finds Out that delved into the relationship between the Clippers and Aspiration. The podcast made allegations that Aspiration helped sidestep the salary cap for a star Clippers player. Ballmer’s lawyers called those allegations “misapprehension or intentional disregard of the facts,” in the letter.

Ballmer’s letter also noted that Because of the association with this firm, the podcast and other public attention of it, he’s been named in lawsuits. Meanwhile, the NBA commented in its own letter regarding Sanberg’s sentencing that it’s investigating the salary cap allegations and Sanberg has been providing evidence, ESPN reported.

While the basketball planet is embroiled in all of these downstream developments, the message founders can take from it is clear: If one fabricates financial documents to raise capital, the outcome will very likely be prison.

The Ballmer Group did not respond to our request for comment.

Topics

When you purchase through links in our articles, we may earn a modest commission. This doesn’t affect our editorial independence.