Roundhill Investments just proved that sometimes the most boring-sounding corner of the tech stack is where the real money flows. The firm’s Memory ETF, ticker DRAM, launched on April 2, 2026, and pulled in nearly $10 billion in assets under management within 43 days, making it one of the fastest-growing ETFs ever recorded.
The fund focuses exclusively on companies manufacturing DRAM, NAND, and high-bandwidth memory chips. In English: it owns the companies that make the components AI systems literally cannot function without.
The memory bottleneck thesis
Roundhill CEO Dave Mazza has been vocal about this dynamic, describing memory as “the biggest bottleneck” facing AI advancements. He expects shortages in the memory market to persist for multiple years.
The DRAM ETF is structured to hold at least 80% of its assets in memory companies. Its top holdings read like a who’s who of the semiconductor memory industry: Micron Technology, Samsung, and SK Hynix.
