The Trade Desk Inc. Joins the S&P 500: A Significant Milestone

The Trade Desk Inc. (NASDAQ:TTD) is set to join the S&P 500, replacing Ansys Inc., highlighting its growing market influence. Citigroup reaffirmed a "Buy" rating for The Trade Desk, with the stock price at $75.43 and experiencing a 14% jump in extended trading following the announcement. The inclusion in the S&P 500 is expected to attract increased interest from fund managers and investors, despite a 36% decline in the stock's value in 2025.

The Trade Desk Inc. (NASDAQ:TTD) is a prominent player in the digital advertising industry, known for its advanced technology platform that enables advertisers to purchase digital ad space efficiently. The company is set to make a significant leap by joining the S&P 500, replacing Ansys Inc. This move underscores The Trade Desk's growing influence in the market.

On July 14, 2025, Citigroup reaffirmed its "Buy" rating for The Trade Desk stock, which was priced at $75.43 at the time. This endorsement comes amid a notable surge in the stock's value, as highlighted by CNBC. The Trade Desk's shares jumped by 14% in extended trading following the announcement of its inclusion in the S&P 500.

The inclusion in the S&P 500 is part of the index's quarterly rebalancing, a process that can also occur off schedule due to significant events like acquisitions. In this case, Synopsys Inc. is set to acquire Ansys, paving the way for The Trade Desk's entry into the index. This change is expected to attract increased interest from fund managers and investors, as stocks typically rally when added to a major index.

Despite the recent boost, The Trade Desk's stock has faced challenges this year, experiencing a 36% decline in 2025. This follows a 63% increase last year and a 61% rise in 2023. The stock's current trading range is between $75.32 and $77.76, with a market capitalization of approximately $37.07 billion. The company's stock has seen a high of $141.53 and a low of $42.96 over the past year.

The Trade Desk's inclusion in the S&P 500 is a testament to its growing market presence and influence in the digital advertising sector. As the company continues to expand its reach, its stock performance will be closely watched by investors and analysts alike.