Skates Spenser - Aug 4, 2025 Form 4 Insider Report for Amplitude, Inc. (AMPL)

Role: Chief Executive Officer, Director, 10%+ Owner
Signature: /s/ Elizabeth Fisher, as attorney in fact for Spenser Skates
Stock symbol: AMPL
Transactions as of: Aug 4, 2025
Transactions value $: $0
Form type: 4
Date filed: 8/6/2025, 05:57 PM
Previous filing: Feb 23, 2022
Next filing: Nov 13, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Skates Spenser	Chief Executive Officer, Director, 10%+ Owner	C/O AMPLITUDE, INC., 201 THIRD STREET, SUITE 200, SAN FRANCISCO	/s/ Elizabeth Fisher, as attorney in fact for Spenser Skates	2025-08-06	0001882913

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AMPL	Class B Common Stock	Gift	$0	-1.01M	-15.9%	$0.00	5.34M	Aug 4, 2025	Class A Common Stock	1.01M		Direct	F1, F2
transaction	AMPL	Class B Common Stock	Gift	$0	+1.01M		$0.00	1.01M	Aug 4, 2025	Class A Common Stock	1.01M		By Spouse	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The Class B Common Stock is convertible at any time at the option of the holder into the Issuer's Class A Common Stock on a one-to-one basis. The Class B Common Stock will convert automatically into shares of the Issuer's Class A Common Stock on a one-to-one basis upon the earlier of (a) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions, (b) the death or incapacity of Mr. Skates, (c) the date that is six months following the date on which Mr. Skates is no longer an employee or director of the Issuer (unless Mr. Skates has rejoined the Issuer during such six-month period) or (d) the date that is six months following the date on which none of the Issuer's founders is an employee or director of the Issuer (unless a founder has rejoined the Issuer during such six-month period).
F2	This transaction involved a gift of securities by the reporting person to his wife. This is not a market transaction, thus no price has been reported. No value was received for the gifted shares.

Content

The Class B Common Stock is convertible at any time at the option of the holder into the Issuer's Class A Common Stock on a one-to-one basis. The Class B Common Stock will convert automatically into shares of the Issuer's Class A Common Stock on a one-to-one basis upon the earlier of (a) any transfer of the Class B Common Stock by the holder, whether or not for value, subject to certain exceptions, (b) the death or incapacity of Mr. Skates, (c) the date that is six months following the date on which Mr. Skates is no longer an employee or director of the Issuer (unless Mr. Skates has rejoined the Issuer during such six-month period) or (d) the date that is six months following the date on which none of the Issuer's founders is an employee or director of the Issuer (unless a founder has rejoined the Issuer during such six-month period).

This transaction involved a gift of securities by the reporting person to his wife. This is not a market transaction, thus no price has been reported. No value was received for the gifted shares.