S&P Dow Jones Indices announced on June 6, 2026, that Rush Street Interactive will be added to the S&P SmallCap 600 index. The inclusion takes effect at the start of trading on Monday, June 22, 2026.
Shares of the Chicago-based iGaming operator rose more than 5% in after-hours trading following the news. Over the past year, the stock value has increased by over 100%. Despite the index name, Rush Street Interactive holds a market capitalization of $6.08 billion, which classifies it as a mid-cap company.
Index Rebalancing and Fund Impact
The index provider stated that the changes ensure each gauge remains representative of its specific market capitalization range. The addition of Rush Street Interactive is part of a broader rebalancing that includes 15 stocks. Passive funds tracking the S&P SmallCap 600, such as the iShares Core S&P Small-Cap ETF and the Vanguard S&P SmallCap 600 ETF, are required to purchase shares to align with the updated index composition.
Rush Street Interactive is the only gaming equity among the companies added to the S&P 500, S&P MidCap 400, and S&P SmallCap 600 during this cycle. The stock is currently included in 69 ETFs and is already a member of the Russell 2000 Index.