Curtis Liu - 08 Jul 2026 Form 4 Insider Report for Amplitude, Inc. (AMPL)

Reporting relationship: Chief Technology Officer, Director, 10%+ Owner
Issuer ticker: AMPL
Reported as of: 08 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 10 Jul 2026, 16:13:00 UTC
Prior SEC filing: 16 Jun 2026
Next SEC filing: 18 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Elizabeth Fisher, as attorney in fact for Curtis Liu

Key filing fact

Curtis Liu filed Form 4 for Amplitude, Inc. (AMPL) on 10 Jul 2026.

Key facts

This page summarizes Curtis Liu's Form 4 filing for Amplitude, Inc. (AMPL).
2 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 10 Jul 2026, 16:13.

Change

Previous filing in this sequence was filed on 16 Jun 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001883022 Primary reporting owner

Liu Curtis

Relationship: Chief Technology Officer, Director, 10%+ Owner
Address: C/O AMPLITUDE, INC., 201 THIRD ST., SUITE 200, SAN FRANCISCO
Signature: /s/ Elizabeth Fisher, as attorney in fact for Curtis Liu
Signature date: 10 Jul 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AMPL transaction Derivative

Class B Common Stock

Gift

Transaction value
Shares: -175,000
Change %: -2.4%
Price: $0.000000^*
Shares after: 7,207,208
Date: 08 Jul 2026
Ownership: By Trust
Underlying class: Class A Common Stock
Underlying amount: 175,000
Exercise price
Footnotes: F1, F2, F3

AMPL transaction Derivative

Class B Common Stock

Gift

Transaction value
Shares: +175,000
Change %
Price: $0.000000^*
Shares after: 175,000
Date: 08 Jul 2026
Ownership: By Spouse
Underlying class: Class A Common Stock
Underlying amount: 175,000
Exercise price
Footnotes: F1, F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote 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 the reporting person, (c) the date that is six months following the date on which the reporting person is no longer an employee or director of the Issuer (unless such reporting person 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).

Footnote F2

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

Footnote F3

Securities held by a trust over which the reporting person exercises voting and dispositive control.