# EDGAR Filing Document

**Accession Number:** 0001835830
**File Stem:** 0001835830-26-000019
**Filing Date:** 2026-4
**Character Count:** 2321
**Document Hash:** 40cfa8f2c8344144d0fef5a570a1854a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001835830-26-000019.hdr.sgml**: 20260429

**ACCESSION NUMBER**: 0001835830-26-000019

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260429

**DATE AS OF CHANGE**: 20260429

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Klaviyo, Inc.
- **CENTRAL INDEX KEY:** 0001835830
- **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:** 001-41806
- **FILM NUMBER:** 26918178

**BUSINESS ADDRESS:**
- **STREET 1:** 125 SUMMER STREET, FLOOR 6
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 800-338-1744

**MAIL ADDRESS:**
- **STREET 1:** 125 SUMMER STREET, FLOOR 6
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

Washington, D.C. 20549

**SCHEDULE 14A**

**Proxy Statement Pursuant to Section 14(a) of the**

**Securities Exchange Act of 1934<br>(Amendment No.)**

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| | | |
|:---|:---|:---|
| Filed by the Registrant ⌧ | Filed by the Registrant ⌧ | Filed by a Party other than the Registrant □ |
| Check the appropriate box: | 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 | |

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**Klaviyo, Inc.**

(Name of Registrant as Specified in Its Charter)

___________________________________________________

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

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| | |
|:---|:---|
| Payment of Filing Fee (Check all boxes that apply) | Payment of Filing Fee (Check all boxes that apply) |
| ⌧ | No fee required. |
| □ | Fee paid previously with preliminary materials. |
| □ | 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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![klaviyoinc_vxnaxp45759xp45.jpg](klaviyoinc_vxnaxp45759xp45.jpg)

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![klaviyoinc_vxnaxp45759xp45a.jpg](klaviyoinc_vxnaxp45759xp45a.jpg)

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