Klaviyo, Inc. SEC Filing

Stephen Rowland filed a notice to sell up to 14,208 KVYO common shares under Rule 144 through Morgan Stanley Smith Barney LLC, with an aggregate market value of 423,966.72.

Accepted by SEC EDGAR 12/15/2025 - 04:13 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Stephen Rowland filed a notice to sell up to 14,208 KVYO common shares under Rule 144 through Morgan Stanley Smith Barney LLC, with an aggregate market value of 423,966.72. The shares are expected to be sold on or around 12/15/2025 on the NYSE.

The securities to be sold were acquired on 11/15/2025 as restricted stock units from the issuer. The notice also lists prior transactions described as 10b5-1 sales for Stephen Rowland: 7,104 shares sold on 11/17/2025 for gross proceeds of 194,591.35 and 7,105 shares sold on 10/15/2025 for 173,021.72. KVYO had 137,856,147 common shares outstanding.

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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	0001639368
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	STEPHEN ROWLAND
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	14208	423966.72	137856147	12/15/2025	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	11/15/2025	Restricted Stock Units	Issuer			14208	11/15/2025	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for STEPHEN ROWLAND 125 Summer Street, 6th Floor Boston MA 02110	Common	11/17/2025	7104	194591.35
10b5-1 Sales for STEPHEN ROWLAND 125 Summer Street, 6th Floor Boston MA 02110	Common	10/15/2025	7105	173021.72

144: Remarks and Signature

Remarks
Date of Notice	12/15/2025
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/22/2024
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/ Stephen Rowland
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)