2025 Most Gaining and Losing Stocks in the ABD Stock Exchange

Winners and Losers in the US Stock Market in 2025

In 2025, the US stock markets drew attention with the expansion of artificial intelligence trading and chip stocks leading the S&P 500. Stocks of companies building data centers also experienced significant growth. However, economic uncertainty caused by tariffs imposed by President Donald Trump put pressure on the shares of some companies.

Prominent companies were particularly those engaged in data storage. Here are the biggest winners and losers of 2025 according to the data:

Winner: New AI Leadership

Technology stocks, especially those associated with artificial intelligence, regained market dominance in 2025. Giants like Microsoft, Amazon, Alphabet, and Meta pledged to invest over $440 billion to develop their AI capabilities. These developments led companies like Sandisk, Western Digital, and Seagate Technology to be among the best performers in the S&P 500.

Winner: Newly Added Companies to the S&P 500

The year 2025 was recorded with the inclusion of many companies such as Robinhood Markets, Sandisk, AppLovin, and Carvana into the S&P 500 index. Each of these companies achieved triple-digit percentage gains, placing them among the top 20 of the index.

Winner: Palantir

Palantir shares are preparing to achieve triple-digit gains for the third consecutive year, a success attributed to strong support from retail investors.

Winner: Warner Bros. Discovery

Warner Bros. Discovery is estimated to have increased in value by approximately 175% in 2025 due to acquisition speculation. When the company was put up for sale, it received offers from Paramount and Netflix; the board considered Netflix's offer.

Loser: Consumer Staples

Economic uncertainty and the effects of tariffs negatively impacted the shares of major consumer staple companies. Clorox, Lamb Weston Holdings, Campbell's, and Constellation Brands were among the 20 worst performers in the S&P 500.

Loser: Retail Sector

This same uncertainty also affected the shares of Deckers Outdoor, the owner of the Hoka and Ugg brands; the company ended a nine-year rising streak, experiencing a decrease of about 50% in value in 2025. Shares of Lululemon Athletica are expected to drop by 45%.

Loser: Managed Healthcare Services

Health insurance stocks underperformed in 2025 despite changes brought about by policies from the Trump administration. Molina Healthcare shares fell by more than 40%, while UnitedHealth Group and Centene Corp. shares also showed declines of over 30%.