Steve Ballmer admits he was defrauded by founder Joseph Sanberg, writes angry letter at sentencing

Yahoo Finance AI · April 24, 2026

AI Summary

•Joseph Sanberg, a founder whom Microsoft's former CEO Steve Ballmer backed as an investor, pleaded guilty to fraud. Ballmer responded by writing a letter at Sanberg's sentencing, detailing the financial and personal harm he suffered as a victim of the scheme.
•Ballmer's letter, made public during sentencing, describes feeling 'duped and silly' — a rare admission from one of tech's most prominent investors that his due diligence failed to catch a fraudulent operator before money was lost.
•For other investors and business professionals: this signals that fraud can happen even with experienced, well-resourced backers doing the vetting. It's a reminder to scrutinize founders carefully, regardless of their track record or credibility, since no investor is immune to deception.

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