ATLAS
AI Stack/Memory & storage

Memory & storage

Severe bottleneck

HBM, DDR, LPDDR, NAND, and enterprise storage stacks. HBM in particular is the gating factor for accelerator bandwidth.

Every training run is memory-bound somewhere. HBM is the closest thing in the industry to a controlled substance — multi-year qualification, three-supplier oligopoly, and a hard-capped capex schedule.

Companies
9
9 pub · 0 priv
Public mcap
$3.83T
Public revenue
$479.89B
Wtd YoY
137%
Wtd GM
56%
Wtd OM
56%
Avg fund
71
Avg tech
76

Market structure

Current TAM
$175.00B
5y TAM
$320.00B
5y CAGR
13.0%
Companies
9
Margin structure
Cyclical
Concentration
Oligopoly
Capex intensity
Extreme
Commoditization
High

Drivers

What grows the pie

  • HBM AI demand
  • Inference DRAM growth
  • Datacenter NAND refresh

Constraints

What can break the thesis

  • HBM packaging capacity
  • Cyclical commodity DRAM
  • Korean concentration

Upstream dependencies

Downstream consumers

Companies in Memory

Ranked by composite score
CompanyMkt CapGrowthFCF%Val1YTechFundAIScoreView
HXSCLSK Hynix$991.53B198.1%19.5%7x82809078High-growth Infrastructure Bet
SSNLFSamsung Electronics$1.42T69.2%17.4%11x83797571Cyclical AI Beneficiary
MUMicron Technology$825.49B196.3%5.0%7x82738064Cyclical AI Beneficiary
RMBSRambus$14.44B8.1%34.6%37x81726262High-growth Infrastructure Bet
NTAPNetApp$23.56B4.4%16.6%14x59635061Watchlist Only
STXSeagate Technology$168.41B44.1%14.6%29x84735561Cyclical AI Beneficiary
WDCWestern Digital$158.42B45.5%17.6%26x85765560Cyclical AI Beneficiary
SNDKSanDisk$206.22B251.0%17.1%8x81754056Watchlist Only
PSTGPure Storage$22.41B10.0%10.3%24x49516049High-growth Infrastructure Bet