SPDR S&P 600 Small Cap ETF (SLY) is an exchange-traded fund that seeks to provide investment results that, before fees and expenses, correspond generally to the total return performance of the S&P SmallCap 600 Index, which measures the small-capitalization segment of the U.S. equity market. Launched on November 8, 2005 by State Street Global Advisors and domiciled in the United States with management by SSgA Funds Management, Inc., the ETF employs a representative sampling technique to invest primarily in growth and value stocks of small-cap companies across diversified sectors including finance, producer manufacturing, electronic technology, health technology, and technology services; it holds approximately 602 stocks with a market-cap weighting scheme, focusing on U.S.-listed common equities with market capitalizations typically between $600 million and $2.7 billion. The fund distributes quarterly dividends, targets institutional and retail investors seeking small-cap blend exposure, and operates exclusively in North American markets with over 97% U.S. allocation.
In June 2023, SPDR Series Trust announced and completed a major reorganization whereby SLY was merged into the larger SPDR Portfolio S&P 600 Small Cap ETF (SPSM), with each SLY share converted into SPSM shares based on relative net asset values, cash in lieu of fractional shares, and the ticker transitioning post-merger effective June 12, 2023; this consolidation combined approximately $1.8 billion in SLY assets under management into SPSM's $5.2 billion portfolio to enhance efficiency and scale. No significant new partnerships, acquisitions, funding rounds, product launches, or strategic shifts have been reported for SLY since the merger, with ongoing operations reflecting standard index rebalancing and sector allocations as of late 2025. The ETF maintains its focus on the S&P SmallCap 600 benchmark without noted parent-subsidiary changes beyond State Street Global Advisors' oversight.