Gomez Luciano Fernandez - Aug 15, 2025 Form 4 Insider Report for Klaviyo, Inc. (KVYO)

Role: Director
Signature: /s/ Landon Edmond, Attorney-in-Fact
Stock symbol: KVYO
Transactions as of: Aug 15, 2025
Transactions value $: -$220,010
Form type: 4
Date filed: 8/19/2025, 08:52 PM
Previous filing: Jun 11, 2025
Next filing: Sep 17, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Fernandez Gomez Luciano	Director	C/O KLAVIYO, INC. 125 SUMMER STREET, 6TH FLOOR, BOSTON	/s/ Landon Edmond, Attorney-in-Fact	2025-08-19	0001730978

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	KVYO	Series A Common Stock	Conversion of derivative security		+7K	+26.13%		33.8K	Aug 15, 2025	Direct	F1, F2
transaction	KVYO	Series A Common Stock	Tax liability	-$220K	-7K	-20.72%	$31.43	26.8K	Aug 15, 2025	Direct	F3, F4

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	KVYO	Series B Common Stock	Conversion of derivative security	$0	-7K	-11.11%	$0.00	56K	Aug 15, 2025	Series A Common Stock	7K		Direct	F1, F2, F5

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

Explanation of Responses:

Id	Content
F1	Represents 7,000 shares of the Issuer's Series B Common Stock, par value $0.001 per share ("Series B Common Stock"), automatically converted into shares of the Issuer's Series A Common Stock, par value $0.001 per share ("Series A Common Stock"), in connection with tax withholding obligations related to the vesting and settlement of restricted stock units ("RSUs").
F2	Each share of Series B Common Stock is convertible at any time at the option of the holder into one share of Series A Common Stock and will automatically convert into one share of Series A Common Stock upon the occurrence of certain events as set forth in the Issuer's certificate of incorporation. The Series B Common Stock has no expiration date.
F3	Represents shares of Series A Common Stock withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting and settlement of RSUs.
F4	Consists of (i) 20,968 shares of Series A Common Stock and (ii) 5,820 unvested RSUs 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.
F5	Consists of (i) 32,666 shares of Series B Common Stock and (ii) 23,334 unvested RSUs awarded under the Issuer's 2015 Stock Incentive Plan, each representing the contingent right to receive one share of Series B Common Stock upon vesting and settlement.