Form 4 Filing for Amplitude, Inc.

Curtis Liu, Chief Technology Officer and 10% owner of Amplitude, Inc., reported a sale of 22,201 shares of Class A Common Stock on June 1, 2026. The shares were sold at a weighted average price of $8.0259, with individual sales ranging from $8.00 to $8.06. This transaction was executed as part of a 10b5-1 trading plan adopted on November 26, 2025. Following this transaction, Liu Curtis holds 1,004,779 shares, which includes 880,520 restricted stock units. The filing indicates that Liu Curtis is both an officer and a director of the company.