DRAM ETF holdings change: portfolio removes TWDDRAM 美股 ETF 持仓份额变化：595112103 TRS 050427 NM权重上升5.52个百分点
Signal Overview
On June 16, 2026, the Roundhill Memory ETF (ticker: DRAM) announced an ETF holdings change. The fund manages $15.51B in assets, saw trading volume of $2.18B on the event date, 4.42x its average daily turnover, and first began trading on April 1, 2026, with a mandate focused on memory and high-bandwidth memory (HBM) supply chains.
Portfolio Breakdown
The change included two types of adjustments: the fund removed tracked holding TWD, increased the weight of Micron Technology swap (595112103 TRS 050427 NM) from 7.35% to 12.87% (+5.52 percentage points) with a 156,831 share count increase, confirming active position sizing. SK hynix Inc (000660.KS) saw its weight rise from 11.91% to 17.29% (+5.37 percentage points) but unchanged share count, indicating only price/NAV-driven weight drift, not active buying or selling. The fund has 72.25% concentration in its top 5 holdings and 111.11% in its top 10, showing high single-name concentration.
Strategy Classification
The fund is classified as an active_explicit strategy, meaning it is explicitly actively managed, not a passive index-tracking product.
Key Implications
Elevated trading volume and existing assets under management signal strong market interest in this memory-themed ETF, while the holdings shift directly reflects the manager’s positioning on core memory supply chain assets, particularly the notable increase in the Micron swap position.
What to Watch Next
Investors should monitor future holdings disclosures for the ETF to confirm additional position changes, and verify that the actual portfolio aligns with its stated memory and HBM supply chain investment mandate.
信号概况
2026年6月16日，Roundhill Memory ETF（股票代码DRAM）发生ETF持仓变动事件。该基金管理规模达155.12亿美元，当日成交额达21.81亿美元，为日均成交额的4.42倍，于2026年4月1日首次上市交易，投资主题聚焦内存及高带宽内存（HBM）供应链。
持仓解读
本次变动包含两类调整：移除了此前追踪的标的TWD，美光科技掉期合约（595112103 TRS 050427 NM）持仓权重从7.35%升至12.87%，增加5.52个百分点，持仓股数同步增加156,831，属于主动仓位调整；SK海力士（000660.KS）持仓权重从11.91%升至17.29%，增加5.37个百分点，但股数未变，仅为价格/净值驱动的权重漂移，并非主动买卖。该ETF前五大持仓集中度达72.25%，前十大达111.11%，整体集中度较高。
策略属性
该基金被归类为主动显性策略，属于明确主动管理的ETF，而非被动跟踪指数的产品。
关键意义
当日高额成交额与现有管理规模显示市场对该内存主题ETF的关注度显著提升，本次持仓调整直接反映管理人对核心内存供应链标的的仓位倾向，尤其是美光科技掉期合约的显著加仓。
后续关注
后续可关注该ETF的后续持仓披露文件，验证是否存在其他标的调整，以及实际持仓是否完全匹配其公布的内存及HBM供应链投资主题。
This analysis was generated by InvestLog AI based on SEC filings, Form 4 insider transactions, Form 144 planned-sale notices, 13F institutional holdings, analyst ratings, and market data. It is for informational purposes only and does not constitute investment advice.这篇研究由 InvestLog AI 基于 SEC 披露、Form 4 内部人交易、Form 144 计划减持、13F 机构持仓、分析师评级和市场数据生成。内容仅供参考，不构成投资建议。