Thomson Reuters to Join Nasdaq-100 Index as of July 28, 2025.

Thomson Reuters Corp will join the Nasdaq-100 Index on July 28, 2025, replacing ANSYS Inc. Thomson Reuters will also be added to the Nasdaq-100 Tech Sector Index and the Nasdaq-100 Equal Weighted Index. ANSYS Inc. will be removed from these indices as well as several other Nasdaq indices. The changes are set to take effect prior to market open on July 28, 2025.

Thomson Reuters Corp will join the Nasdaq-100 Index on July 28, 2025, replacing Ansys Inc. This change, which will take effect prior to market open on July 28, 2025, is part of a broader reconfiguration of several Nasdaq indices. Thomson Reuters will also be added to the Nasdaq-100 Tech Sector Index and the Nasdaq-100 Equal Weighted Index, while Ansys Inc. will be removed from these indices as well as several other Nasdaq indices [3].

The Nasdaq-100 Index is a market capitalization-weighted index of the 100 largest non-financial companies listed on the Nasdaq Stock Market. The inclusion of Thomson Reuters Corp in the index is expected to diversify the portfolio and potentially bring in new investors. The removal of Ansys Inc. is likely to have a minor impact on the index, as Ansys Inc. is not one of the top 100 largest companies in the index [3].

The changes come amidst a period of significant market activity, with the Nasdaq Composite reaching new highs and the S&P 500 and Dow Jones Industrial Average experiencing mixed performance. The Nasdaq Composite gained 0.59% on July 15, 2025, driven by strong earnings reports from companies like Nvidia and Citigroup [4].

Investors and financial professionals should closely monitor these changes and their potential impact on market dynamics. The inclusion of Thomson Reuters Corp in the Nasdaq-100 Index could signal a shift towards greater emphasis on information technology and media services in the index. The removal of Ansys Inc. may also have implications for the technology sector, particularly given Ansys' role as a leading provider of simulation software [3].

References:
[1] https://www.reuters.com/business/sp-nasdaq-end-subdued-note-after-brief-dip-latest-trump-tariff-rumbling-2025-07-18/
[2] https://www.tradingview.com/news/moneycontrol:a8f50c86a094b:0-vijaya-diagnostic-board-to-consider-q1-fy26-results-on-july-28-2025/
[3] https://www.gurufocus.com/news/2976456/ansys-inc-anss-to-exit-sp-500-following-acquisition-by-synopsys-anss-stock-news
[4] https://www.reuters.com/business/nasdaq-sp-500-futures-gain-ground-with-earnings-inflation-spotlight-2025-07-15/