Ken Griffin's Castle Investments has sold more than $4 billion in holdings from the company's stock portfolio previously acquired from the troubled AI hedge fund Situational Awareness. “Up to now, in close cooperation with our counterparties, we have successfully reduced the overall risk of our original portfolio by more than 80%,” Griffin said in a letter to investors on Friday. “In the process, we have completed nearly 100 major transactions, with a total market capitalization of over $4 billion.” Castle reached an agreement at the end of last month to buy shares from Situational Awareness, a hedge fund managed by Leopold Aschenbrenner. At the time, the fund was in trouble because it triggered an additional security deposit notice. Situational Awareness stabilized the situation after reaching a deal with the castle.

Ken Griffin's Castle Investments has sold more than $4 billion in holdings from the company's stock portfolio previously acquired from the troubled AI hedge fund Situational Awareness. “Up to now, in close cooperation with our counterparties, we have successfully reduced the overall risk of our original portfolio by more than 80%,” Griffin said in a letter to investors on Friday. “In the process, we have completed nearly 100 major transactions, with a total market capitalization of over $4 billion.” Castle reached an agreement at the end of last month to buy shares from Situational Awareness, a hedge fund managed by Leopold Aschenbrenner. At the time, the fund was in trouble because it triggered an additional security deposit notice. Situational Awareness stabilized the situation after reaching a deal with the castle.