Jennifer Ceran - 12 Feb 2026 Form 4 Insider Report for Klaviyo, Inc. (KVYO)

Role: Director
Signature: /s/ Landon Edmond, Attorney-in-Fact
Issuer symbol: KVYO
Transactions as of: 12 Feb 2026
Net transactions value: +$300,311
Form type: 4
Filing time: 17 Feb 2026, 16:26:10 UTC
Previous filing: 11 Jun 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Ceran Jennifer	Director	C/O KLAVIYO, INC., 125 SUMMER STREET, 6TH FLOOR, BOSTON	/s/ Landon Edmond, Attorney-in-Fact	17 Feb 2026	0001652155

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	KVYO	Series A Common Stock	Purchase	$300,311	+16,339	+114%	$18.38	30,691	12 Feb 2026	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $18.36 to $18.38 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price at which the transactions were effected.
F2	Consists of (i) 24,871 shares of the Issuer's Series A Common Stock, par value $0.001 per share ("Series A Common Stock"), and (ii) 5,820 unvested restricted stock units awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement.

Content

The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $18.36 to $18.38 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price at which the transactions were effected.

Consists of (i) 24,871 shares of the Issuer's Series A Common Stock, par value $0.001 per share ("Series A Common Stock"), and (ii) 5,820 unvested restricted stock units awarded under the Issuer's 2023 Stock Option and Incentive Plan, each representing the contingent right to receive one share of Series A Common Stock upon vesting and settlement.