KVYO insider files Form 144 after restricted stock vesting; $351.7K sale planned

Rhea-AI Filing Summary

Klaviyo, Inc. (KVYO) insider filed a Form 144 to sell 11,155 Class A shares through Fidelity Brokerage Services on the NYSE with an aggregate market value of $351,717.15. The shares were acquired on 08/15/2025 via restricted stock vesting and the planned approximate sale date is 08/18/2025. The filing shows total Class A shares outstanding of 116,897,730. No other sales in the past three months were reported in this notice. The filer represents they are not aware of undisclosed material adverse information.

Positive

• Insider sale is small relative to outstanding shares (11,155 vs 116,897,730), indicating limited market impact
• Securities were acquired through restricted stock vesting, signaling the sale is liquidity from compensation rather than external disposition
• Sale will be executed through a regulated broker (Fidelity) on the NYSE, consistent with standard disclosure practices

Negative

• Form does not list the filer's name or CIK in the provided text, limiting identification of the insider
• No indication of a 10b5-1 plan adoption date is provided, so the sale may not be pre-scheduled

Insights

Securities Analyst

TL;DR: Small-scale post-vesting sale by an insider; transaction size is immaterial relative to shares outstanding.

The filing documents a planned sale of 11,155 Class A shares valued at $351,717.15 following restricted stock vesting on 08/15/2025, to be executed through Fidelity on or about 08/18/2025. Against 116.9 million shares outstanding, this sale represents a de minimis fraction of equity, suggesting limited immediate dilution or signaling. The absence of any reported sales in the prior three months reduces concerns about a broader disposition pattern. This is a routine insider liquidity event tied to compensation rather than an external financing or material corporate action.

Corporate Governance Expert

TL;DR: Governance-compliant disclosure of an insider sale tied to vesting; procedural safeguards appear followed.

The notice indicates the securities were acquired by restricted stock vesting and will be sold via a registered broker on the NYSE. The signer affirms no undisclosed material adverse information, and no 10b5-1 plan date is provided. Procedurally, the filing meets Rule 144 disclosure requirements by listing acquisition date, nature of acquisition, broker, and approximate sale date. For governance review, the transaction is routine and transparent, with no immediate red flags in the data supplied.

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

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
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	11155	351717.15	116897730	08/18/2025	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 *
Class A	08/15/2025	Restricted Stock Vesting	Issuer			11155	08/15/2025	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 does the Form 144 filed for KVYO report?

The filing reports a proposed sale of 11,155 Class A shares valued at $351,717.15, acquired by restricted stock vesting on 08/15/2025 with an approximate sale date of 08/18/2025 via Fidelity on the NYSE.

How material is this insider sale compared to Klaviyo's outstanding shares (KVYO)?

The sale represents a very small portion of the capital base: 11,155 shares vs 116,897,730 outstanding, so the transaction is immaterial to total share count.

Were any other sales in the past three months reported for this insider?

Nothing to Report is stated for securities sold during the past three months.

How were the shares acquired according to the filing?

The shares were acquired on 08/15/2025 through restricted stock vesting and the payment nature is listed as compensation.

Through which broker and exchange will the KVYO shares be sold?

The sale is to be executed through Fidelity Brokerage Services LLC on the NYSE.