Leopold Aschenbrenner, a former OpenAI researcher described by Odaily as an "AI stock guru," has disclosed a portfolio concentrated in AI infrastructure, semiconductors, and computing-related assets.
His biggest long positions are SanDisk (SNDK), which accounts for 28% of the portfolio, and Micron (MU), which makes up 27.5%. Other major holdings include Bloom Energy (BE) at 9.4%, Taiwan Semiconductor Manufacturing Co. (TSM) at 6.2%, and Nebius (NBIS) at 6.1%.
Core holdings center on memory, chips, and compute infrastructure
Beyond those top positions, Aschenbrenner also holds CoreWeave (CRWV), Core Scientific (CORZ), Applied Digital (APLD), Riot Platforms (RIOT), and IREN, according to the disclosure. Those companies are tied to AI data centers, chips, and energy infrastructure.
About $315 million in new call option premium exposure
On the options side, Aschenbrenner recently added roughly $315 million in call option premium exposure tied to AMD, Bloom Energy, CoreWeave, SK Hynix, SanDisk, Intel, and the Roundhill Memory ETF (DRAM).
He has also fully exited earlier put option hedge positions linked to Nvidia, AMD, Micron, TSM, and ASML.
Private portfolio includes several AI companies
The disclosure also lists private investments in Anthropic at about $5 billion, Fluidstack at $830 million, Source Foundry at $500 million, MatX at $500 million, and Physical Intelligence at $1 billion.
According to the disclosed information, the positions mainly come from a second-quarter 2026 13F filing and recent options trading data. The same disclosure shows that Aschenbrenner has removed his semiconductor-sector hedge and increased bullish exposure to memory chips and AI computing infrastructure companies.