Klaviyo shares rise 1.78% after-hours following a secondary offering announcement.

Klaviyo, Inc. rose 1.78% in after-hours trading, following the announcement of a secondary offering of 6.5 million shares by certain existing stockholders. The offering, which includes an additional 30-day option for up to 975,000 shares, is expected to close on August 21, 2025. The company will not receive any proceeds from the sale, as the shares are being offered by the selling stockholders.