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

8. Varonis Systems, Inc. (NASDAQ:VRNS)

Market Cap: $6.72 Billion

3Y CAGR: 28.95%

Number of Hedge Fund Holders: 37

Varonis Systems, Inc. (NASDAQ:VRNS) is one of the best-performing mid-cap tech stocks in the past three years, buoyed by steady SaaS adoption and targeted AI integrations that have expanded its role in enterprise data security. On September 29, 2025, UBS reiterated its Buy rating on Varonis and raised its price target from $65 to $70, citing positive customer and partner checks that suggest sustained demand for the company’s cloud-native platform and strong execution in its transition to a recurring-revenue model.

The upgrade came shortly after a series of strategic moves in 2025, including Varonis’s September 2 acquisition of SlashNext, an AI-driven email-security firm, and its June integration with OpenAI’s ChatGPT Enterprise Compliance API, enabling real-time data-classification and monitoring in generative-AI environments. Together, these initiatives extend Varonis’s capabilities beyond file-system protection into email, collaboration, and AI-workload security—segments increasingly prioritized by enterprise buyers.

Through acquisitions and partnerships, Varonis Systems, Inc. (NASDAQ:VRNS) has steadily evolved from a data-governance specialist into a broad data-security platform that protects sensitive information across on-premise, cloud, and SaaS environments.