Amplify Etho Climate Leadership US ETF (ETHO) is an exchange-traded fund that seeks investment results tracking the Etho Climate Leadership Index – US before fees and expenses. The fund invests at least 80% of its total assets in U.S. companies identified as leaders in their industries based on climate efficiency, utilizing proprietary data encompassing Scope 1-3 carbon footprints; it employs a rigorous five-level screening process including quantitative climate leadership selection, exclusion of unsustainable industries such as fossil fuels, tobacco, weapons, and gambling, ESG company screens, expert stakeholder reviews, and equal weighting of qualifying equities, which are reconstituted annually in April. Launched on November 18, 2015, and listed on NYSE Arca, ETHO exhibits a total expense ratio of 0.45% and focuses on mid-cap blend equities across diversified sectors, excluding high-pollution sub-industries like gold and silver while prioritizing operational efficiency and lower emissions relative to sector peers. Amplify Investments LLC serves as the investment adviser with Tidal Investments LLC as sub-adviser, while Etho Capital LLC provides the underlying index; the fund is domiciled in the United States with headquarters operations tied to Amplify ETFs in Lisle, Illinois. Recent developments include sustained collaboration with Etho Capital for index methodology enhancements developed by Stanford University climate experts, ongoing annual rebalancing to adapt to evolving ESG data, and resilience amid broader Amplify ETFs portfolio expansions into income and thematic strategies as of 2025, with no major acquisitions or funding rounds reported in the last two years. The ETF targets investors seeking fossil-free, sustainable exposure to U.S. equities, holding approximately 300 stocks with equal weighting to promote diversification and mitigate concentration risks.