5 Best High Short Interest Stocks With Highest Upside Potential

4. Klaviyo Inc. (NYSE:KVYO)

Average Upside Potential: 63.76%

Klaviyo Inc. (NYSE:KVYO) is one of the best high short interest stocks with highest upside potential. On May 5, Klaviyo reported strong Q1 2026 results, highlighted by 28% year-over-year revenue growth to $358.0 million and its strongest operating margin as a public company. The firm increased its total customer base to over 196,000, with notable growth in enterprise-tier accounts and international markets.

Driven by these results, the company raised its full-year 2026 revenue guidance to a range of $1.514 billion to $1.522 billion. Operational highlights included a 25% year-over-year increase in revenue per employee and the launch of new AI-driven features like Composer and Custom Skills. To return value to shareholders, Klaviyo authorized a $500 million share repurchase program and completed an initial $100 million accelerated buyback in April.

In a leadership transition, CFO Amanda Whalen announced her decision to step down. She will remain in her role until August 21, and will serve in an advisory capacity through November to ensure a smooth transition while Klaviyo Inc. (NYSE:KVYO) searches for her successor.

Klaviyo Inc. (NYSE:KVYO) delivers an AI-first SaaS platform for B2C clients that supports customer relationship management. The platform enables data storage, campaigns, marketing automation, and analytics. It also enables customer service integration and omnichannel marketing tools, such as email, SMS, and WhatsApp campaigns.