# EDGAR Filing Document

**Accession Number:** 0001866692
**File Stem:** 0001140361-26-016730
**Filing Date:** 2026-4
**Character Count:** 2014
**Document Hash:** d3d0b954124e73b169e1d5ee52d8dd66
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-016730.hdr.sgml**: 20260424

**ACCESSION NUMBER**: 0001140361-26-016730

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260424

**DATE AS OF CHANGE**: 20260424

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Amplitude, Inc.
- **CENTRAL INDEX KEY:** 0001866692
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40817
- **FILM NUMBER:** 26894806

**BUSINESS ADDRESS:**
- **STREET 1:** 201 THIRD STREET, SUITE 200
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94103
- **BUSINESS PHONE:** (415) 231-2353

**MAIL ADDRESS:**
- **STREET 1:** 201 THIRD STREET, SUITE 200
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94103

#### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### SCHEDULE 14A

#### <br>

#### Proxy Statement Pursuant to

#### Section 14(a) of the Securities Exchange Act of 1934

#### (Amendment No.)
Filed by the Registrant ☒ Filed by a party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material under §240.14a-12

#### <br>

## Amplitude, Inc.

#### (Name of Registrant as Specified in its Charter)

#### <br>

#### (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
Payment of Filing Fee (Check all boxes that apply):

☒ No fee required. <br> ☐ Fee paid previously with preliminary materials. <br> ☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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