13f-changes
Granular segment

Storage media

Storage media covers HDD, NAND, and related storage suppliers. AI training and inference create enormous data flows, but the investable question is whether storage demand translates into pricing power, capacity discipline, and better mix.

Current reported exposure$250M
Tagged bought / added$223M
Tagged sold / reduced$30M
Tracked funds1

This segment sits inside the physical and semiconductor supply chain that supports AI training and inference. The important question is not only whether AI demand grows, but where scarcity shows up: chips, memory, networking, power, sites, or specialized services.

For 13F analysis, the tag is meant to separate the specific bottleneck a company is exposed to from the broad AI label. That helps distinguish a direct accelerator supplier from a power-equipment company, a data center landlord, or a miner with a power portfolio that could be repurposed for HPC.

What it covers
  • Nearline hard drives
  • NAND flash and SSDs
  • Enterprise storage systems
  • Controllers, substrates, and supply-chain components
What to watch
  • Nearline HDD pricing
  • NAND supply discipline
  • Cloud capex mix
  • How much AI data retention drives incremental storage demand
Leopold Aschenbrenner

Situational Awareness LP

Leopold Aschenbrenner · Q4 2025 filed 2026-02-11

4.5% of reported 13F $250M

Hard-drive, NAND, and storage-media suppliers tied to AI data retention and datacenter buildouts.

TickerNameValueInstrument
SNDK SANDISK CORP $250M SH
TickerActionValue
SNDK Added +$223M
WDC Closed -$18M
STX Closed -$11M