iShares U.S. Small-Cap Equity Factor ETF (SMLF) is an exchange-traded fund that seeks to track the investment results of the STOXX U.S. SmallCap Equity Factor Index, composed of U.S. small-capitalization stocks exhibiting favorable exposure to target style factors including value, quality, momentum, low size, and low volatility, subject to constraints; the fund provides investors with diversified exposure to approximately 860 small-cap equities across sectors such as industrials, financials, and information technology, with top holdings including EMCOR Group Inc., Comfort Systems USA Inc., and Interactive Brokers Group Inc.; it features a low expense ratio of 0.15%, quarterly dividend distributions yielding around 1.25%, and assets under management exceeding $2.5 billion. Launched on April 28, 2015 and domiciled in the United States, SMLF operates primarily in U.S. equity markets and lists on NYSE Arca, managed by BlackRock's iShares team including Jennifer Hsui since inception, alongside Paul Whitehead, Peter Sietsema, Matt Waldron, and Steven White as of April 2025. Recent developments include strong net inflows contributing to multifactor ETF growth amid BlackRock's broader iShares expansion, with the firm rebranding 22 active ETFs to iShares in October 2025 to unify its 420+ fund lineup managing over $2.88 trillion; portfolio manager additions in April 2025 enhance oversight; and sustained performance with year-to-date returns around 11% and one-year total returns near 13.4% as of late 2025, alongside ongoing collaboration with STOXX for index methodology amid evolving factor investing trends.