Klaviyo plans sale of 15,531 Series A shares

Klaviyo, Inc. filed notice of a proposed sale of 15,531 shares of Series A common stock, par value $0.001 per share.

Rhea-AI Filing Summary

Klaviyo, Inc. filed notice of a proposed sale of 15,531 shares of Series A common stock, par value $0.001 per share. The securities are to be sold through Goldman Sachs & Co. LLC on the NYSE. The filing lists an aggregate market value for these shares of $285,149.16, based on 126,937,933 shares of this class outstanding as of the filing. The notice also references earlier pre-IPO equity purchases and indicates that 169,076 shares of Series A common stock were involved in pre-IPO transactions dated September 20, 2023.

Key Figures

Shares to be sold: 15,531 shares Aggregate market value: $285,149.16 Shares outstanding: 126,937,933 shares +1 more

4 metrics

Shares to be sold 15,531 shares Proposed sale of Series A common stock under the notice

Aggregate market value $285,149.16 Value of 15,531 Series A shares covered by the notice

Shares outstanding 126,937,933 shares Series A common stock outstanding as referenced in the notice

Pre-IPO transaction shares 169,076 shares Series A shares in pre-IPO transactions dated September 20, 2023

Key Terms

Series A common stock, aggregate market value, pre-IPO transactions, equity interests

4 terms

Series A common stock financial

"Series A common stock, par value $0.001 per share"

Series A common stock is a specific class of a company’s ordinary shares issued during an early formal funding round, carrying the ownership rights and voting power tied to that class. For investors it signals an early-stage equity claim with potential upside if the business grows, but also greater risk and typically less liquidity than shares in mature, publicly traded firms—imagine buying a seat on a startup’s team before the company has proven itself.

aggregate market value financial

"15531 | 285149.16 | 126937933 | 08/11/2026 | 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.

pre-IPO transactions financial

"09/20/2023 | Pre-IPO Transactions | Klaviyo, Inc."

equity interests financial

"Equity interests in the Issuer were purchased pre-IPO."

Equity interests are an ownership stake in a company—usually represented by shares or membership units—that give the holder a claim on the business’s profits, assets and sometimes voting power. Think of it as owning one or more slices of a company’s pie: the bigger your slice, the larger your share of dividends, capital gains and influence, and the more you are affected by dilution or company losses. Investors use equity interests to measure value, control and potential returns.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Klaviyo (KVYO) disclose in this Form 144 filing?

Klaviyo discloses a proposed sale of 15,531 shares of its Series A common stock through Goldman Sachs & Co. LLC on the NYSE, with an aggregate market value of $285,149.16 and 126,937,933 shares of that class outstanding.

How many Klaviyo (KVYO) shares are proposed to be sold and on which market?

The filing covers a proposed sale of 15,531 Series A common shares of Klaviyo, Inc. The shares are indicated for sale on the NYSE, with Goldman Sachs & Co. LLC listed as the broker handling the transaction.

What is the aggregate market value of the Klaviyo (KVYO) shares covered by this notice?

The notice states that the 15,531 shares of Klaviyo’s Series A common stock have an aggregate market value of $285,149.16. This value is tied to the specific block of shares identified in the Form 144 filing.

How many Klaviyo (KVYO) Series A shares are outstanding according to this filing?

The filing reports that there are 126,937,933 shares of Klaviyo’s Series A common stock outstanding. This figure provides context for the relative size of the 15,531-share block proposed for sale under the notice.

What prior Klaviyo (KVYO) transactions are referenced in the Form 144?

The filing references pre-IPO activity, noting that 169,076 shares of Series A common stock were involved in pre-IPO transactions on September 20, 2023. It states that equity interests in the issuer were purchased pre-IPO.

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

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Accepted by SEC EDGAR 08/11/2026 - 06:33 PM EDT 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	0001654074
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 ST, 6TH FLOOR BOSTON MASSACHUSETTS 02110
Phone	617-213-1788
Name of Person for Whose Account the Securities are To Be Sold	Summit Investors GE IX-VC IV, LLC
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	10% Stockholder

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 Common stock, par value $0.001 per share	Goldman Sachs & Co. LLC 200 West Street New York NY 10282	15531	285149.16	126937933	08/11/2026	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 *
Series A common stock, par value $0.001 per share	09/20/2023	Pre-IPO Transactions	Klaviyo, Inc.			169076	09/20/2023	Equity interests in the Issuer were purchased pre-IPO.

* 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	08/11/2026
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	Adam Hennessey
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)