Klaviyo (NYSE: KVYO) executive plans Rule 144 stock sale

Rhea-AI Filing Summary

Klaviyo, Inc. (KVYO) received a Form 144 notice from officer Landon Edmond covering a proposed sale of up to 53,473 shares of Klaviyo common stock under Rule 144. The shares would be sold through Morgan Stanley Smith Barney LLC Executive Financial Services on the NYSE, with an approximate sale date of August 28, 2026. The securities were acquired upon the vesting of restricted stock units between September 19, 2023 and August 15, 2026. Klaviyo reports 126,937,933 shares of this class outstanding.

Key Figures

Shares proposed to be sold: 53,473 shares of common stock Aggregate market value: $1,048,605.53 Shares outstanding: 126,937,933 shares +2 more

5 metrics

Shares proposed to be sold 53,473 shares of common stock Rule 144 notice for proposed sale by officer Landon Edmond

Aggregate market value $1,048,605.53 Aggregate market value of 53,473 shares proposed to be sold

Shares outstanding 126,937,933 shares Number of shares of this class outstanding for Klaviyo, Inc.

Approximate date of sale 08/28/2026 Approximate date of sale for the proposed Rule 144 transaction

RSU vesting period 09/19/2023–08/15/2026 Period during which RSUs vested and were acquired for the planned sale

Key Terms

Rule 144, Restricted Stock Units, aggregate market value, securities to be sold

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"The securities to be sold were acquired upon the vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

aggregate market value financial

"| 53473 | 1048605.53 | 126937933 | 08/28/2026 | NYSE"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

securities to be sold financial

"The securities to be sold were acquired upon the vesting of restricted stock units"

FAQ

What does the KVYO Form 144 filed by Landon Edmond disclose?

It discloses that officer Landon Edmond intends to sell up to 53,473 shares of Klaviyo, Inc. (KVYO) common stock under Rule 144 through Morgan Stanley Smith Barney LLC on or about August 28, 2026 on the NYSE.

How many KVYO shares does Landon Edmond plan to sell under this Form 144?

The notice covers a proposed sale of 53,473 shares of Klaviyo common stock. These securities were acquired upon the vesting of restricted stock units during the period from September 19, 2023 through August 15, 2026.

What is the aggregate market value of the KVYO shares covered by this Form 144?

The Form 144 lists an aggregate market value of approximately $1,048,605.53 for the 53,473 Klaviyo common shares proposed to be sold under Rule 144.

How many KVYO shares are outstanding according to this Form 144 filing?

The filing states that there are 126,937,933 shares of the relevant class of Klaviyo common stock outstanding. This figure provides context for the size of the proposed 53,473-share sale under Rule 144.

What type of securities is Landon Edmond selling in this KVYO Form 144?

The notice covers sales of common stock of Klaviyo, Inc., originally acquired as Restricted Stock Units that vested from September 19, 2023 through August 15, 2026, and now planned for sale under Rule 144.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/28/2026 - 04:27 PM Accepted by SEC EDGAR 08/28/2026 - 04:26 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001991399
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Klaviyo, Inc.
SEC File Number	001-41806
Address of Issuer	125 Summer Street, 6th Floor Boston MASSACHUSETTS 02110
Phone	6172131788
Name of Person for Whose Account the Securities are To Be Sold	LANDON EDMOND
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	53473	1048605.53	126937933	08/28/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/19/2023	Restricted Stock Units	Issuer			53473	09/19/2023	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 9/19/2023 through 08/15/2026
Date of Notice	08/28/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/21/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Landon Edmond
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)