• Klaviyo CFO Amanda Whalen sold 14,000 shares of Series A Common Stock on Aug. 14 at USD 18.47.
• A further 28,950 shares were disposed of on Aug. 15 at USD 18.49.
• Directly owned Series A Common Stock holdings stood at 795,242 shares following the transactions.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Klaviyo Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001470831-26-000839), on August 18, 2026, and is solely responsible for the information contained therein.