Tidal Trust II – Defiance Daily Target 2X Long OSS ETF is a United States-domiciled, actively managed exchange-traded fund that seeks daily investment results, before fees and expenses, equal to 200% of the daily percentage change in the share price of One Stop Systems, Inc. (Nasdaq: OSS). Trading under the ticker OSSL, the Fund provides leveraged long exposure to OSS through derivatives, including swap agreements and listed call options, with daily rebalancing designed to maintain approximately two times exposure to the underlying security’s daily performance. It is intended principally for active traders seeking short-term bullish exposure to One Stop Systems, a provider of high-performance computing and data-storage systems serving artificial intelligence, machine-learning, defense, aerospace, automotive, industrial and commercial applications. The Fund does not seek to achieve its stated objective over periods longer than one trading day, and its returns for longer holding periods may differ materially from two times the cumulative return of OSS due to daily compounding and volatility. OSSL is advised by Tidal Investments LLC and marketed under the Defiance ETFs brand; it is part of Tidal Trust II and is offered to U.S. investors through exchange-traded shares. The Fund was established on May 5, 2026, and was listed by Cboe on May 27, 2026, representing a recent expansion of Defiance ETFs’ single-stock daily-target leveraged ETF lineup. As of September 4, 2026, the Fund reported net assets of approximately $94,938 and 20,000 shares outstanding.