Trade Desk Stock Surges on S&P 500 Inclusion

Trade Desk shares jumped 9.5% after being added to the S&P 500 index, replacing ANSYS. The company operates a cloud-based platform for digital advertising campaigns and has a market capitalization of about $40 billion. Shares were down 35% YTD before the boost. The inclusion in the index marks a significant milestone for Trade Desk, which is positioned in the mid-range of S&P 500 companies by valuation.

Trade Desk Inc. (NASDAQ: TTD) saw its shares jump by 9.5% after being added to the S&P 500 index, replacing software maker Ansys. The addition comes amidst a year of significant market fluctuations for Trade Desk, which has experienced a 35% year-to-date (YTD) decline in its stock price.

The digital advertising technology company operates a cloud-based platform for digital advertising campaigns and has a market capitalization of approximately $40 billion. The inclusion in the S&P 500 index, which typically attracts significant buying pressure, is seen as a major milestone for Trade Desk, positioning it in the mid-range of S&P 500 companies by valuation.

Trade Desk's addition to the S&P 500 index is part of the quarterly rebalancing process, which occasionally includes off-schedule changes due to acquisitions and other significant events. Ansys, the company being replaced, is set to be acquired by Synopsys, with the deal expected to close on or around Thursday.

The inclusion of Trade Desk in the S&P 500 index is a significant validation of its leadership in the digital advertising sector. The company, founded in 2009 by CEO Jeff Green and David Pickles, specializes in online advertising space purchase and optimization, serving over 1,100 customers, primarily advertising agencies and independent advertisers.

The recent addition to the S&P 500 is likely to boost investor confidence and drive stock performance, as index funds need to rebalance their portfolios to reflect the changes. Despite its market cap hit this year, Trade Desk's inclusion is a testament to its growth and success in the digital advertising space.

References:
[1] https://www.cnbc.com/2025/07/14/trade-desk-stock-jumps-as-ad-tech-company-replaces-ansys-in-sp-500.html
[2] https://www.ainvest.com/news/trade-desk-surges-14-500-inclusion-robinhood-misses-2507/
[3] https://www.ainvest.com/news/trade-desk-inclusion-500-validates-leadership-digital-advertising-2507/