---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-280707"
form_type: "8-K"
ticker: "AMPL"
cik: "0001866692"
company_name: "Amplitude, Inc."
filed_at: "2021-09-23T23:59:59+00:00"
generated_at: "2026-06-29T01:52:14.574471+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Amplitude announces 44.2M Class A shares outstanding; expects Nasdaq trading on Sept 28

## Summary
- 44.2M Class A shares and 58.5M Class B shares outstanding as of Sep 22, 2021 (0.4M Class A, 1.1M Class B subject to vesting).
- Fully diluted capitalization of 129.5M shares; 114.0M excluding unvested options/RSUs (treasury method, $32.02 hypothetical price).
- Class A common stock to begin trading on Nasdaq Capital Market on September 28, 2021.
- Each outstanding Class B share is convertible into one Class A share at the holder's option at any time.

## SEC filing metadata
- accession: 0001193125-21-280707
- form_type: 8-K
- ticker: AMPL
- cik: 0001866692
- company_name: Amplitude, Inc.
- filed_at: 2021-09-23T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1866692/000119312521280707/0001193125-21-280707-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1866692/000119312521280707/d204342d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-280707
- JSON: https://secwatch.observer/filing/0001193125-21-280707.json
- Plain text: https://secwatch.observer/filing/0001193125-21-280707.txt

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