Planned share sale by Klaviyo (KVYO) CLO totals 15,093 shares

Rhea-AI Filing Summary

Klaviyo, Inc. Chief Legal Officer Edmond Landon sold 15,093 shares of Series A Common Stock in an open-market transaction. The weighted average sale price was $20.16 per share, with individual trades ranging from $20.00 to $20.63 per share.

The sale was made under a pre-arranged Rule 10b5-1 trading plan adopted on August 21, 2025. After this transaction, Landon’s holdings consist of 98,321 shares of Series A Common Stock and 228,407 unvested restricted stock units, each RSU representing a right to receive one share upon vesting and settlement.

Insider Trade Summary

Net Seller: 15,093 shares ($304,275)

Net Sell 1 txn

Insider Edmond Landon

Role Chief Legal Officer

Sold 15,093 shs ($304K)

Type	Security	Shares	Price	Value
Sale	Series A Common Stock	15,093	$20.16	$304K

Holdings After Transaction: Series A Common Stock — 326,728 shares (Direct)

Footnotes (1)

1. These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 21, 2025. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $20.00 to $20.63 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 sold at each separate price within the range set forth in this footnote. Consists of (i) 98,321 shares of the Issuer's Series A Common Stock, par value $0.001 per share ("Series A Common Stock"), and (ii) 228,407 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.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Edmond Landon

(Last) (First) (Middle)

C/O KLAVIYO, INC.

125 SUMMER STREET, 6TH FLOOR

(Street)

BOSTON MA 02110

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Klaviyo, Inc. [ KVYO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Legal Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/05/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Series A Common Stock	03/05/2026		S(1)		15,093	D	$20.16(2)	326,728(3)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 21, 2025.

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $20.00 to $20.63 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 sold at each separate price within the range set forth in this footnote.

3. Consists of (i) 98,321 shares of the Issuer's Series A Common Stock, par value $0.001 per share ("Series A Common Stock"), and (ii) 228,407 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.

Remarks:

	/s/ Landon Edmond	03/05/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Klaviyo (KVYO) report for Edmond Landon?

Klaviyo reported that Chief Legal Officer Edmond Landon sold 15,093 shares of Series A Common Stock. The transaction was an open-market sale executed at a weighted average price of $20.16 per share, with individual trade prices ranging from $20.00 to $20.63.

Was the Klaviyo (KVYO) insider sale by Edmond Landon pre-planned?

Yes. The sale by Edmond Landon was executed under a Rule 10b5-1 trading plan adopted on August 21, 2025. Such plans allow insiders to schedule trades in advance, helping separate personal portfolio decisions from day-to-day nonpublic company information.

How many Klaviyo (KVYO) shares did Edmond Landon sell and at what price?

Edmond Landon sold 15,093 shares of Klaviyo’s Series A Common Stock. The weighted average sale price was $20.16 per share, with multiple trades completed within a price range from $20.00 to $20.63 per share during the transaction date.

What are Edmond Landon’s holdings in Klaviyo (KVYO) after this transaction?

After the sale, Edmond Landon holds 98,321 shares of Series A Common Stock and 228,407 unvested restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Series A Common Stock upon future vesting and settlement conditions being satisfied.

What type of security did Edmond Landon trade in Klaviyo (KVYO)?

The transaction involved Klaviyo’s Series A Common Stock, par value $0.001 per share. In addition to these shares, Landon also has unvested restricted stock units tied to the same class, each unit potentially converting into one share upon vesting and settlement.

How many Klaviyo (KVYO) shares has Edmond Landon sold in this Form 4 filing?

This Form 4 filing shows a single net sale of 15,093 shares by Edmond Landon. The filing’s transaction summary indicates one sale transaction, no purchases, and a net-sell direction equal to 15,093 shares of Klaviyo’s Series A Common Stock in this event.