SEMI focuses on pure-play companies related to the semiconductor industry. The fund actively invests in 30-50 high-conviction semiconductor or semiconductor-related firms, as defined by GICS, including those under communication equipment, electronic equipment, technology hardware, storage and peripherals, and software. Additionally, the fund requires at least 25% of its assets be invested in companies in the semiconductor and semiconductor equipment industry. Security selection is done through proprietary research. SEMI is a non-transparent ETF and does not provide daily disclosure of its portfolio holdings unlike other ETFs. As such, there is a risk that shares of the fund may trade at wider spreads, especially during periods of volatility. The fund instead publishes a trading basket daily, which provides a preview of selected holdings without disclosing the actual portfolio. Prior to August 12, 2024, the fund traded under the name Columbia Seligman Semiconductor and Technology ETF.