• Amplitude CEO and President Spenser Skates reported his spouse sold 107,136 Class A Common Stock shares on October 23, 2026.
• The sale price was $17.5194 per share, leaving no Class A Common Stock held through his spouse.
• His spouse converted 107,136 Class B Common Stock shares into Class A Common Stock on the same date.
• Remaining Class B Common Stock holdings totaled 5,342,146 shares directly owned; his spouse held 200,021 shares.

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: 0001610717-26-000444), on October 27, 2026, and is solely responsible for the information contained therein.