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After Margin Calls, Aschenbrenner Invests $400M in AI

8/7/2026

Summary

Story summary

U.S. investor Leopold Aschenbrenner invested $400 million in an unnamed private AI firm after his fund’s near-implosion.
Margin calls forced Aschenbrenner to sell public stocks to billionaire Ken Griffin’s Citadel to pay lenders.
After the sale, Situational Awareness held about $10 billion in assets.
The fund, down 67 % in July, stays ahead year after Aschenbrenner eliminated leverage and kept a $5 billion Anthropic stake.
Aschenbrenner married Avital Balwit at a party in Carmel.

History

Historical Context

Microsoft’s 2019 $1 billion investment in OpenAI was the first major corporate backing of the 2015 nonprofit, moving it toward cloud-based AI under CEO Satya Nadella and founder Sam Altman. By 2026, Aschenbrenner’s Situational Awareness fund, which peaked at $45 billion, lost $35 billion, leading Citadel’s Kenneth Griffin to buy its distressed AI shares. The trend shows tech giants and hedge funds shaping AI financing.

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Story summary

U.S. investor Leopold Aschenbrenner invested $400 million in an unnamed private AI firm after his fund’s near-implosion.
Margin calls forced Aschenbrenner to sell public stocks to billionaire Ken Griffin’s Citadel to pay lenders.
After the sale, Situational Awareness held about $10 billion in assets.
The fund, down 67 % in July, stays ahead year after Aschenbrenner eliminated leverage and kept a $5 billion Anthropic stake.
Aschenbrenner married Avital Balwit at a party in Carmel.

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