• Amplitude CEO and President Spenser Skates reported his spouse sold 48 Class A Common Stock shares on November 9, 2026.
• The sale price was $17.4744 per share, leaving no Class A Common Stock held through his spouse.
• His spouse also converted 48 Class B Common Stock shares into 48 Class A Common Stock shares that day.
• Following the transactions, Skates held 5,342,146 Class B Common Stock shares directly; his spouse held 192,060.

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. Amplitude 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: 0001610717-26-000452), on November 12, 2026, and is solely responsible for the information contained therein.