Key facts
- Leopold Aschenbrenner's hedge fund acquired 12.4 million shares of Nebius.
- The stake represents a 5.6% ownership in Nebius.
- Nebius reported Q1 revenue of $399 million, up 684% year-over-year.
- Nebius is targeting $7-9 billion in annualized revenue by the end of 2026.
- NBIS stock has risen over 176% in 2026, trading around $231.
- Nebius raised its 2026 capex guidance to $20-25 billion.
Leopold Aschenbrenner, a former OpenAI researcher and founder of Situational Awareness, has acquired a significant stake in Nebius (NBIS), a company focused on AI infrastructure and GPU capacity leasing. This move aligns with Aschenbrenner's investment strategy in 'neocloud' companies, which provide raw GPU power for AI workloads, filling a gap left by traditional hyperscalers. Nebius's strong revenue growth and aggressive expansion plans have attracted investor attention.