Officer and Director Stock Transaction - Amplitude, Inc.

Curtis Liu, Chief Technology Officer, Director, and 10% Owner of Amplitude, Inc., reported a transaction on May 15, 2026. Mr. Liu disposed of 40,279 shares of Class A Common Stock due to a net issuance related to tax withholding obligations upon the vesting of restricted stock units. The transaction price was $6.06 per share. Following this transaction, Mr. Liu owns 1,026,980 shares, which includes 880,520 RSUs. This filing was made on May 19, 2026.