Klaviyo, Inc. Stock Soars 15.91% to Intraday High of $18.54

Klaviyo, Inc., a small-cap player in the software products industry, has experienced a significant surge in its stock price, gaining 15.91% on June 1, 2026. The stock reached an intraday high of USD 18.54, marking a notable performance against the broader market, where the S&P 500 only increased by 0.26% on the same day. Over the past week, Klaviyo has shown a robust performance with a 23.47% increase, contrasting sharply with the S&P 500's 1.69% rise. However, the company's performance over the longer term reveals a more complex picture. In the past month, Klaviyo's stock has declined by 17.3%, and it has faced a significant drop of 46% over the past year, while the S&P 500 has gained 28.56%. Despite these fluctuations, Klaviyo has reported positive results for the last three consecutive quarters, with operating cash flow reaching USD 168.95 million and net sales at USD 293.12 million. However, the company continues to face challenges, including a negative EBITDA and a market cap of USD 5,852 million.