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The Trade Desk Shares Spike 15% After Hours — Here's Why The Stock Is Trending Tonight - Ansys (NASDAQ:ANSS), Citigroup (NYSE:C)

LOS ANGELES COUNTY, CALIFORNIA, JUL 15 – The Trade Desk will join the S&P 500 after Synopsys' $35 billion acquisition of Ansys, with The Trade Desk valued at $37 billion, ranking mid-sized in the index.

  • The Trade Desk will replace software maker Ansys in the S&P 500 index effective from market open on July 18, 2025.
  • This change follows Synopsys' approved $35 billion acquisition of Ansys, expected to close on or around July 17, 2025.
  • The Trade Desk, a Ventura-based digital advertising company founded in 2009 by Jeff Green and David Pickles, has over 3,522 employees and competes with companies including Amazon and Google.
  • Trade Desk shares jumped about 14.7% in after-hours trading to $86.50 following the S&P 500 inclusion announcement, while its market capitalization is approximately $37 billion despite a 36% stock decline in 2025.
  • The Trade Desk's addition to the S&P 500 suggests increased visibility and is expected to draw more investors, requiring fund managers to rebalance portfolios accordingly.
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The Berkshire EagleThe Berkshire Eagle
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The Trade Desk Set to Join S&P 500

NEW YORK, July 14, 2025 /PRNewswire/ -- The Trade Desk Inc. (NASD: TTD) will replace ANSYS Inc. (NASD: ANSS) in the S&P 500 effective prior to the opening of trading on Friday, July 18. S&P 500 constituent Synopsys Inc. (NASD:…

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NNY360 broke the news in on Monday, July 14, 2025.
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