Shares of Zeta Global Holdings Corp. (ZETA) surged 9.82% in after-hours trading on Tuesday following the company's release of its third-quarter 2025 financial results and increased guidance for the full year.

The AI Marketing Cloud company reported impressive Q3 results, with revenue of $337.0 million, a 26% increase year-over-year, exceeding the midpoint of guidance by $9.0 million. Excluding revenue from political candidates and LiveIntent, revenue grew 28% year-over-year. Zeta also reported strong cash flow performance, with free cash flow of $47.0 million, up 83% year-over-year, achieving a record 14% margin.

Investors were particularly encouraged by Zeta's raised guidance for Q4 and full-year 2025, as well as its initial 2026 outlook. The company increased its full-year 2025 revenue guidance to a range of $1,273 million to $1,276 million, up $11 million at the midpoint from prior guidance. Adjusted EBITDA guidance was also raised to a range of $273.2 million to $274.1 million. For 2026, Zeta projects revenue of $1,540 million, representing a year-over-year increase of 21%, with adjusted EBITDA of $354 million. This positive outlook, coupled with the company's strong Q3 performance, appears to be driving the significant after-hours stock price increase.