Klaviyo insider plans Rule 144 stock sale

Klaviyo, Inc. has a notice of proposed sale of Series A common stock by Goldman Sachs & Co. LLC under Rule 144.

Rhea-AI Filing Summary

Klaviyo, Inc. has a notice of proposed sale of Series A common stock by Goldman Sachs & Co. LLC under Rule 144. The filing lists 2,955,112 shares of Series A common stock, par value $0.001 per share, to be sold on the NYSE with an aggregate market value of $54,255,856.32. It also notes that 32,170,006 equity interests in Klaviyo were purchased in pre-IPO transactions on September 20, 2023.

Key Figures

Shares proposed for sale: 2,955,112 shares Aggregate market value: $54,255,856.32 Pre-IPO equity interests purchased: 32,170,006 +2 more

5 metrics

Shares proposed for sale 2,955,112 shares Series A common stock to be sold under Rule 144

Aggregate market value $54,255,856.32 Value associated with 2,955,112 shares of Series A common stock

Pre-IPO equity interests purchased 32,170,006 Equity interests in Klaviyo purchased in pre-IPO transactions on 09/20/2023

Pre-IPO transaction date 09/20/2023 Date equity interests in the issuer were purchased pre-IPO

Intended sale market NYSE Listed marketplace for the proposed sale of Series A common stock

Key Terms

Rule 144, Series A common stock, pre-IPO transactions, equity interests

4 terms

Rule 144 regulatory

"144: Securities To Be Sold"

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.

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.

pre-IPO transactions financial

"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, Inc. (KVYO) disclose in this Form 144?

Klaviyo, Inc. discloses a proposed Rule 144 sale of 2,955,112 shares of its Series A common stock by Goldman Sachs & Co. LLC, with an aggregate market value of $54,255,856.32, to be sold on the NYSE.

How many Klaviyo (KVYO) shares are proposed to be sold under Rule 144?

The notice lists a proposed sale of 2,955,112 shares of Klaviyo’s Series A common stock. These shares have an aggregate market value of $54,255,856.32 according to the filing’s securities information section.

Who is the selling security holder in the Klaviyo (KVYO) Form 144?

The selling security holder is Goldman Sachs & Co. LLC, located at 200 West Street, New York, NY 10282. The firm is identified as the holder of the Series A common stock proposed to be sold under Rule 144.

What pre-IPO transactions does Klaviyo (KVYO) reference in this filing?

The filing notes that 32,170,006 equity interests in Klaviyo, Inc. were purchased in pre-IPO transactions dated September 20, 2023. These are described as equity interests in the issuer purchased before the initial public offering.

On which market are the Klaviyo (KVYO) shares in this Form 144 expected to trade?

The securities information section identifies the trading market as the NYSE. The proposed sale involves Klaviyo’s Series A common stock, par value $0.001 per share, to be sold on that exchange.

What is the listed aggregate market value of the Klaviyo (KVYO) shares in this Form 144?

The filing lists an aggregate market value of $54,255,856.32 for the 2,955,112 shares of Series A common stock covered. This figure appears in the securities information section tied to the proposed Rule 144 sale.

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

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Accepted by SEC EDGAR 08/11/2026 - 06:35 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	0001634415
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 Partners Growth Equity Fund IX-A, L.P.
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	2955112	54255856.32	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.			32170006	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)