TradingKey – Dutch cloud computing service provider Nebius Group ( NBIS) saw its pre-market share price surge by as much as 11%. The core catalyst for this rally was a significant equity disclosure: Situational Awareness, an investment firm founded by former OpenAI researcher Leopold Aschenbrenner, revealed in a regulatory filing that it holds 12.4 million Class A ordinary shares of Nebius, a 5.6% stake that makes it one of the company’s largest institutional investors.

Aschenbrenner rose to prominence following a 2024 article predicting that AGI (Artificial General Intelligence) could emerge around 2027. The core investment thesis of his fund, Situational Awareness LP, is betting that the rapid development of AI will drive explosive…