Summit Partners L P - Jun 30, 2025 SCHEDULE 13G/A Report for Klaviyo, Inc. Series A Common Stock, par value $0.001 per share (KVYO)

Filing Manager
SUMMIT PARTNERS L P
Reporting Manager
Summit Partners, L.P.
Security
Klaviyo, Inc. Series A Common Stock, par value $0.001 per share
Symbol
KVYO
Shares outstanding
148M shares
Disclosed Ownership
30.8M shares
Ownership
20.9%
Form type
SCHEDULE 13G/A
Date filed
8/8/2025, 04:33 PM
Date of event
Jun 30, 2025
Previous filing
May 7, 2025
Next filing
Nov 13, 2025
SEC
View on sec.gov

Reporting Managers (6)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Summit Partners Growth Equity Fund IX-A, L.P. 12.33% 18.2M 0 18.2M /s/ Adam H. Hennessey, as POA Adam H. Hennessey, as Power of Attorney
Summit Partners Growth Equity Fund IX-B, L.P. 7.7% 11.4M 0 11.4M /s/ Adam H. Hennessey, as POA Adam H. Hennessey, as Power of Attorney
Summit Partners Co-Invest (Kiwi), L.P. 0.76% 1.12M 0 1.12M /s/ Adam H. Hennessey, as POA Adam H. Hennessey, as Power of Attorney
Summit Investors GE IX/VC IV, LLC 0.06% 95.8K 0 95.8K /s/ Adam H. Hennessey, as POA Adam H. Hennessey, as Power of Attorney
Summit Investors GE IX/VC IV (UK), L.P. 0.01% 12.4K 0 12.4K /s/ Adam H. Hennessey, as POA Adam H. Hennessey, as Power of Attorney
Summit Partners, L.P. 20.87% 30.8M 0 30.8M /s/ Adam H. Hennessey, as POA Adam H. Hennessey, as Power of Attorney