In September, the S&P 500 index saw a solid 3.5% gain, marking its fifth consecutive monthly increase. The top-performing stocks were Warner Brothers Discovery (NASDAQ: WBD), AppLovin (NASDAQ: APP), and Western Digital (NASDAQ: WDC). Warner Brothers Discovery surged 68.1%, AppLovin jumped 49.2%, and Western Digital climbed 46.6%. Each company has unique strengths and growth potential, making them worth considering for investment opportunities. For more insights on potential investment opportunities, check out the 10 best stocks to buy right now as identified by the Motley Fool Stock Advisor analyst team.

Read more at Nasdaq: These Were the 3 Top-Performing Stocks in the S&P 500 in September 2025 — and One Popped 68%!