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. The memory bottleneck thesisRoundhill CEO Dave Mazza has been vocal about this dynamic, describing memory as “the biggest bottleneck” facing AI advancements. AdvertisementThe DRAM ETF is structured to hold at least 80% of its assets in memory companies. The firm launched the Roundhill Generative AI & Technology ETF, ticker CHAT, back on May 18, 2023.