---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-284202"
form_type: "8-K"
ticker: "AMPL"
cik: "0001866692"
company_name: "Amplitude, Inc."
filed_at: "2021-09-27T23:59:59+00:00"
generated_at: "2026-06-29T01:21:59.773200+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Amplitude announces share counts: 46.1M Class A, 56.6M Class B; trading starts Sept 28

## Summary
- As of Sept 27, 2021: 46.1M Class A shares outstanding, 56.6M Class B shares outstanding.
- Of these, 0.4M Class A and 1.1M Class B shares are subject to future vesting.
- Class A common stock expected to commence trading on Nasdaq Sept 28, 2021.
- Each Class B share is convertible at any time into one Class A share.

## SEC filing metadata
- accession: 0001193125-21-284202
- form_type: 8-K
- ticker: AMPL
- cik: 0001866692
- company_name: Amplitude, Inc.
- filed_at: 2021-09-27T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1866692/000119312521284202/0001193125-21-284202-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1866692/000119312521284202/d222857d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-284202
- JSON: https://secwatch.observer/filing/0001193125-21-284202.json
- Plain text: https://secwatch.observer/filing/0001193125-21-284202.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.