Nathaniel Glenn Crook - 15 May 2026 Form 4 Insider Report for Amplitude, Inc. (AMPL)

Reporting relationship: Chief Commercial Officer
Issuer ticker: AMPL
Reported as of: 15 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 19 May 2026, 16:28:13 UTC
Prior SEC filing: 17 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Elizabeth Fisher, as attorney in fact for Nathaniel Glenn Crook

Key filing fact

Nathaniel Glenn Crook filed Form 4 for Amplitude, Inc. (AMPL) on 19 May 2026.

Key facts

This page summarizes Nathaniel Glenn Crook's Form 4 filing for Amplitude, Inc. (AMPL).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 19 May 2026, 16:28.

Change

Previous filing in this sequence was filed on 17 Apr 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 0002121274 Primary reporting owner

Crook Nathaniel Glenn

Relationship: Chief Commercial Officer
Address: 201 THIRD STREET, SUITE 200, SAN FRANCISCO
Signature: /s/ Elizabeth Fisher, as attorney in fact for Nathaniel Glenn Crook
Signature date: 19 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AMPL transaction

Class A Common Stock

Tax liability

Transaction value
Shares: -101,292
Change %: -4.7%
Price: $6.06^*
Shares after: 2,032,064
Date: 15 May 2026
Ownership: Direct
Footnotes: F1, F2, F3

^* 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

Represents shares of the Issuer's Class A Common Stock withheld by the Issuer solely to satisfy tax withholding obligations in connection with the net issuance of shares of the Issuer's Class A Common Stock delivered to the reporting person on May 15, 2026, from the vesting of restricted stock units ("RSUs"), and does not represent a sale by the Reporting Person.

Footnote F2

Includes 1,471,366 RSUs.

Footnote F3

Includes 2,330 shares acquired under the Issuer's employee stock purchase plan on May 14, 2026.