ALTMAN UNDER OATH: MUSK DEMANDED 90% OF OPENAI AT FOUNDING — THEN WALKED Sam Altman took the stand in the Musk v. OpenAI trial Tuesday and dropped one of the most explosive revelations yet from this already explosive case. Under cross-examination, Altman testified that Elon Musk demanded a 90% equity stake in OpenAI at the founding stage. When he did not get it, Musk walked. That is what sits at the center of this $150 billion lawsuit — a man who says he was cheated out of a nonprofit mission, but who apparently wanted to control nearly the whole company from day one. This changes the narrative significantly. Musk has framed himself as the betrayed idealist who wanted to protect AI for humanity. Altman’s testimony paints a different picture: Musk wanted majority control of the most important AI lab in history, got turned down, and is now trying to take it apart in court. Microsoft CEO Satya Nadella also testified earlier in the week, stating Musk never once raised concerns with him about Microsoft’s investment in OpenAI violating any agreements. The trial is expected to wrap by May 21. Potential damages reach $150 billion. The entire AI industry is watching every word from this witness stand because the verdict could reshape who controls OpenAI — and with it, the trajectory of AI development itself. Keywords: Sam Altman testimony, Musk OpenAI trial, OpenAI lawsuit 2026, Elon Musk OpenAI equity