Steve Ballmer says he was misled by a startup founder who admitted fraud

Silicon Valley has long tolerated founder exaggeration in investor pitches, often framing it as part of presenting a bold vision. However, there are instances where that line is crossed, leading to legal consequences for founders and reputational fallout for their backers.

One such case involves Joseph Sanberg, whose fintech startup Aspiration Partners once attracted support from high-profile figures, including former Microsoft CEO and current Los Angeles Clippers owner Steve Ballmer. In August 2025, Sanberg pleaded guilty to two counts of wire fraud related to the defrauding of investors and lenders, according to a press release from the U.S. Department of Justice. Each charge carries a potential sentence of up to 20 years in prison.

Ahead of a sentencing hearing scheduled for Monday, victims were invited to submit statements to the court describing the impact of Sanberg’s actions. Ballmer did so publicly, with his legal team stating in a letter that he had suffered financial losses, reputational harm, and ongoing scrutiny, including an investigation by the National Basketball Association related to the situation.

Sanberg co-founded Aspiration Partners as a green fintech company offering services such as credit cards and investment products designed to avoid fossil fuel exposure. The company promoted features such as automatically planting trees with each card transaction. In 2021, Aspiration announced plans to go public via a SPAC merger, valuing the business at $2.3 billion, though the deal ultimately did not materialise.

According to the Justice Department, Aspiration recorded and reported revenue tied to entities controlled by Sanberg, creating the impression of consistent customer activity and income that did not actually exist. Authorities also allege that Sanberg misled investors by presenting a fabricated letter from the company’s audit committee claiming it held $250 million in available cash and equivalents, when in reality it had less than $1 million. In addition, prosecutors say Sanberg, along with a board member who has also pleaded guilty, falsified financial documents to secure $145 million in loans.

When Ballmer shared his letter on X, he wrote that he felt deceived by the situation, noting that others connected to the company — including employees, customers, and investors — were similarly affected and are still assessing the extent of their losses.

The letter indicates that Ballmer invested $60 million in Aspiration and lost the entire amount. Beyond his role as an investor, he had also partnered with the company to provide carbon offset programs for the Los Angeles Clippers and their arena, and Aspiration served as a major sponsor for the team.

Ballmer also stated that his reputation had been negatively impacted. In his letter, he addressed claims made in a multi-part series from the sports podcast Pablo Torre Finds Out, which examined the relationship between the Clippers and Aspiration. The series alleged that the company may have helped a star player circumvent the NBA’s salary cap. Ballmer’s legal team rejected those claims, describing them as a misunderstanding or disregard of the facts.

The letter further noted that Ballmer has been named in lawsuits connected to the matter. Meanwhile, the NBA stated in its own submission related to Sanberg’s sentencing that it is reviewing the salary cap allegations, with Sanberg reportedly cooperating and providing information during the process.

While developments tied to the case continue to unfold within the basketball and business communities, the broader implication for founders is evident: fabricating financial information to secure funding can lead to severe legal consequences, including prison.