2025 Most Gaining and Losing Stocks on the ABD Stock Exchange

Winners and Losers in the US Stock Market in 2025

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

Prominent companies were particularly those operating in data storage. Here are the biggest winners and losers of 2025 based on the data:

Winner: New Artificial Intelligence Leadership

Technology stocks, particularly those connected to artificial intelligence, regained market dominance in 2025. Giants like Microsoft, Amazon, Alphabet, and Meta committed to invest over $440 billion in order to enhance their artificial intelligence capabilities. These developments led to companies like Sandisk, Western Digital, and Seagate Technology becoming some of the best performers in the S&P 500.

Winner: Newly Added Companies to the S&P 500

2025 was marked by the inclusion of many companies such as Robinhood Markets, Sandisk, AppLovin, and Carvana in 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 set to achieve triple-digit gains for the third consecutive year, a success attributed to strong retail investor support.

Winner: Warner Bros. Discovery

Warner Bros. Discovery saw an estimated value increase of %175 in 2025 due to acquisition speculation. The company received bids from Paramount and Netflix when put up for sale; the board of directors evaluated Netflix's offer.

Loser: Consumer Staples

The effects of economic uncertainty and tariffs adversely affected the stocks of large consumer staples companies. Clorox, Lamb Weston Holdings, Campbell's, and Constellation Brands were among the worst-performing 20 companies in the S&P 500.

Loser: Retail Sector

The same uncertainty also impacted Deckers Outdoor, the owner of the Hoka and Ugg brands; the company ended its nine-year streak of gains, losing nearly %50 in value in 2025. Shares of Lululemon Athletica are expected to drop by %45.

Loser: Managed Healthcare Services

Health insurance stocks performed poorly in 2025 despite expected changes to policies under the Trump administration. Shares of Molina Healthcare lost more than %40 in value, while UnitedHealth Group and Centene Corp. also showed declines of over %30.