Klaviyo shares fall 1.54% premarket ahead of K:BOS event in Boston.

Klaviyo, Inc. declined 1.54% in premarket trading. The company is hosting its flagship event, K:BOS, on September 25-26, 2025, in Boston, which will bring together over a thousand customers, partners, and brand leaders to share strategies and showcase innovation. The event is focused on navigating economic uncertainty, shifting consumer expectations, and the rise of AI, which could be influencing the stock's movement.