Leopold Aschenbrenner exits semiconductor put hedges and adds bullish bets on memory and AI infrastructure
Leopold Aschenbrenner, the former OpenAI researcher sometimes referred to as an "AI stock guru," has disclosed a portfolio heavily concentrated in AI infrastructure, semiconductors, and computing-related assets. His largest long positions are SanDisk (SNDK) at 28% and Micron (MU) at 27.5%, followed by Bloom Energy (BE) at 9.4%, Taiwan Semiconductor Manufacturing Co. (TSM) at 6.2%, and Nebius (NBIS) at 6.1%. He also holds positions in CoreWeave, Core Scientific, Applied Digital, Riot Platforms, and IREN, all tied to AI data centers, chips, or energy infrastructure. On the options side, Aschenbrenner recently added about $315 million in call option premium exposure across AMD, Bloom Energy, CoreWeave, SK Hynix, SanDisk, Intel, and the Roundhill Memory ETF (DRAM). At the same time, he has fully exited earlier put option hedges on Nvidia, AMD, Micron, TSM, and ASML. The disclosure also lists private investments in Anthropic, Fluidstack, Source Foundry, MatX, and Physical Intelligence, with the positions mainly drawn from a second-quarter 2026 13F filing and recent options trading data.