Duolingo, Inc. (DUOL) shares surged 21.07% in after-hours trading on Wednesday following the release of its impressive second-quarter 2025 financial results and the announcement of a strategic acquisition. The language-learning platform demonstrated robust growth and profitability, exceeding analyst expectations in several key areas.

The company reported a 41% year-over-year increase in revenue, reaching $252.3 million, slightly above the FactSet estimate of $240.7 million. Subscription revenue growth was particularly strong at 46%. Duolingo's earnings per share (EPS) of $0.91 significantly outperformed the analyst consensus of $0.59. In light of these strong results, the company raised its full-year guidance, projecting revenue between $1,011 million and $1,019 million, surpassing the previous estimate of $996.6 million.

Adding to the positive sentiment, Duolingo announced the acquisition of NextBeat, a London-based music gaming startup. This strategic move aims to enhance the company's music course offerings and marks its first official presence in the UK. The acquisition brings in 23 experts in game design and music licensing, aligning with Duolingo's goal of making learning as engaging as playing a game. Investors appear to be responding favorably to this combination of strong financial performance and strategic growth initiatives, driving the significant after-hours stock price increase.