05:14 AM EDT, 07/15/2025 (MT Newswires) -- (Updates with the latest stock price movement in the headline and the last paragraph.)

Trade Desk ( TTD ) will replace Ansys (ANSS) in the S&P 500, effective before the opening of trading Friday, S&P Dow Jones Indices said Monday.

The acquisition of Ansys by Synopsys (SNPS) is expected to be completed Thursday, according to S&P Dow Jones.

Trade Desk ( TTD ) shares were up 15% in recent premarket activity Tuesday.