KVYO Form 144: Founder Sells 89,748 Series A Shares on NYSE

Rhea-AI Filing Summary

Klaviyo, Inc. (KVYO) filed a Form 144 reporting a proposed sale of 89,748 Series A shares through Fidelity Brokerage Services on the NYSE, with an aggregate market value of $2,845,870.50. The notice lists the shares as founders' shares acquired from the issuer on 09/25/2012 and indicates the original acquisition was recorded as compensation. The filing shows 116,897,730 shares outstanding, and the approximate sale date is 09/15/2025. No securities were reported sold by the holder in the past three months. The filer affirms they are unaware of any undisclosed material adverse information.

Insights

Securities Analyst

TL;DR: Insider plans to sell a modest block of longstanding founders' shares worth about $2.85M; appears routine and not clearly material to valuation.

The filer intends to sell 89,748 Series A shares acquired as founders' shares in 2012. At the reported aggregate value, this position reflects a small fraction of the issuer's reported outstanding shares. The filing contains standard Rule 144 disclosures and states no sales in the prior three months, which suggests this is an isolated planned liquidity event rather than ongoing distribution activity. There is no new financial performance or operational information in the filing to alter an investment thesis.

Corporate Governance Expert

TL;DR: This is a compliance filing reflecting an insider liquidity action; governance implications are limited absent evidence of patterned selling.

The Form 144 documents an insider selling pre-existing founders' shares acquired from the issuer and confirms the filer’s representation about lack of undisclosed material information. From a governance perspective, single-event insider sales of this scale are common for early stakeholders seeking diversification. The filing does not disclose any trading plan adoption date or other governance actions and contains no indications of dispute, regulatory issue, or material corporate change.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

Relationship to Issuer

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
Series A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	89748	2845870.50	116897730	09/15/2025	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 *
Series A	09/25/2012	Founders Shares	Issuer			89748	09/25/2012	Compensation

* 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

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What did Klaviyo (KVYO) report in this Form 144?

The filer reported a proposed sale of 89,748 Series A shares on 09/15/2025 via Fidelity, with an aggregate market value of $2,845,870.50.

When and how were the shares being sold acquired?

The shares were acquired on 09/25/2012 as founders' shares from the issuer, with the acquisition recorded as compensation.

Has the filer sold any Klaviyo securities in the past three months?

No. The filing states "Nothing to Report" for securities sold during the past three months.

On which exchange is the proposed sale planned?

The sale is planned on the NYSE through Fidelity Brokerage Services LLC.

How large is the position relative to outstanding shares?

The filing lists 116,897,730 shares outstanding; the 89,748 shares reported represent a small fraction of that total.