Leopold Aschenbrenner's Fund Turns $20,000 SanDisk Stake Into $1M

Situational Awareness, the hedge fund founded by 25-year-old former OpenAI researcher Leopold Aschenbrenner, acquired 115,000 SanDisk shares at around $100 per share in Q3 2025 and expanded the holding to 1.14 million shares by the end of March. The investment capitalized on SanDisk's explosive rally, with the stock hitting $2,107.86 on Monday and climbing 788% year-to-date. The fund's thesis centers on rapid AI advances driving demand for chips, data centers, and compute infrastructure. SanDisk's surge reflects a memory supercycle fueled by AI data center demand, with the company trading independently since February last year after separating from Western Digital.

Situational Awareness Expands SanDisk Position From Q3 2025 Through March

Situational Awareness first took a stake in SanDisk Corp. in Q3 2025, acquiring 115,000 shares at around $100 per share. By the end of March, Aschenbrenner increased the holding to 1.14 million shares. With SanDisk stock hitting $2,107.86 on Monday, the stake is now worth $2.4 billion.

SanDisk stock has rocketed nearly 4,860% in the past year. An investor who put in just over $20,000 a year ago would be sitting on $1 million worth of SanDisk today.

Fund Holds VanEck Semiconductor ETF, Nvidia, Oracle as Top Three Positions

SanDisk was Situational Awareness's sixth-largest holding by value as of March. The VanEck Semiconductor ETF (SMH), Nvidia, and Oracle were the top three in that order. Last month, the fund disclosed a major 5.6% stake in Nebius, a Nvidia-backed neocloud firm.

Aschenbrenner Launched Fund in 2024 Around AI Infrastructure Thesis

Aschenbrenner is a former OpenAI Superalignment researcher who became popular in 2024 after publishing "Situational Awareness: The Decade Ahead," an essay predicting that AGI could arrive by around 2027 and trigger massive economic and geopolitical disruption. He launched Situational Awareness LP in 2024, with the fund set up around the thesis that rapid advances in AI will drive explosive demand for chips, data centers, electricity, and compute infrastructure.

Retail Sentiment Remains Bullish on Memory Sector Rally

On Stocktwits, retail sentiment for SanDisk was bullish as of early Tuesday. The stock has run 788% year-to-date amid a memory supercycle driven by demand for chips and components from AI data centers. More than three-quarters of nearly 1,000 users who voted in a Stocktwits poll said they remain bullish on the memory-chip sector and expect the rally to have further room to run.

SanDisk was earlier a unit of Western Digital and began trading as an independent company in February last year.

FAQ

What stake did Leopold Aschenbrenner's fund take in SanDisk in Q3 2025? Situational Awareness acquired 115,000 SanDisk shares at around $100 per share in Q3 2025 and expanded the holding to 1.14 million shares by the end of March.

How much has SanDisk stock gained over the past year? SanDisk stock has rocketed nearly 4,860% in the past year and climbed 788% year-to-date, hitting $2,107.86 on Monday.

What is the investment thesis behind Situational Awareness fund? The fund was set up around the thesis that rapid advances in AI will drive explosive demand for chips, data centers, electricity, and compute infrastructure.