10 Best-Performing Mid-Cap Tech Stocks in the Last 3 Years

6. Zeta Global Holdings Corp (NYSE:ZETA)

Market Cap: $4.75 Billion

3Y CAGR: 39.51%

Number of Hedge Fund Holders: 34

Zeta Global Holdings Corp. (NYSE:ZETA) is one of the best-performing mid-cap tech stocks in the last three years, powered by steady revenue growth, expanding data assets, and rising adoption of its AI-driven marketing cloud. On October 1, 2025, Canaccord Genuity reiterated its Buy rating on Zeta and raised its price target from $28 to $30, following the company’s announcement of its planned acquisition of Marigold, a fellow marketing software provider.

Canaccord said the deal is opportunistic rather than defensive, highlighting that Zeta’s core demand trends remain strong and management has reaffirmed both Q3 and full-year guidance. The firm expects the Marigold acquisition, which is slated to close by late Q4 2025, to contribute about $190 million in incremental annual revenue and $30–35 million in adjusted EBITDA once integrated. Analysts also emphasized Zeta’s competitive advantage in first-party data, an embedded customer data platform, and integrated omnichannel marketing tools, which continue to differentiate it in a crowded martech landscape.

Zeta Global Holdings Corp. (NYSE:ZETA), headquartered in New York City, operates an AI-powered cloud platform that helps enterprises identify, engage, and retain customers across digital channels using proprietary data and predictive intelligence.