Power Solutions International (PSIX): Leopold Aschenbrenner Admires This Power Firm

May 30, 2026 - 18:01

Leopold Aschenbrenner, the former OpenAI researcher who turned a controversial firing into a massive hedge fund success story, has placed a bet on Power Solutions International, Inc. (NASDAQ:PSIX). The company ranks 22nd on a list of stocks admired by the fund manager, who now controls a $13.7 billion empire.

Power Solutions International first appeared in the 13F portfolio of Situational Awareness LP during the fourth quarter of 2025. The stake marks a notable addition to a fund that has shaken up the hedge fund world with its rapid growth and unconventional origins. Aschenbrenner, once dismissed from OpenAI over a security dispute, has since built a reputation for identifying undervalued industrial plays.

Power Solutions International specializes in designing and manufacturing powertrain systems for industrial applications. The company serves sectors like energy, agriculture, and transportation. Its inclusion in Aschenbrenner's portfolio suggests a bet on steady demand for heavy-duty engines and alternative fuel systems.

The fund's move into PSIX aligns with a broader strategy of targeting firms with solid fundamentals but overlooked market positions. Aschenbrenner's rise from a fired researcher to a billionaire fund manager has drawn intense scrutiny, but his picks continue to attract attention from investors looking for the next breakout opportunity.