Klaviyo: Edward W. Hallen proposes $2.01M share sale

The proposed Series A sale is listed through Fidelity Brokerage Services LLC on NYSE.

Available on EDGAR 11/05/2026 - 11:03 AM EST Accepted by SEC EDGAR 11/05/2026 - 10:59 AM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Klaviyo, Inc. reports a proposed sale of 98,782 Series A shares for Edward W. Hallen’s account, with an aggregate market value of $2,005,274.60 and a proposed sale date of November 5, 2026. The notice identifies 59,615 shares from Hodgkins LLC and 39,167 from Hodgkins Trust; it describes Hallen as an authorized individual and account stakeholder for the LLC, and an account stakeholder for the trust.

Key Figures

Proposed shares for sale: 98,782 Series A shares Aggregate market value: $2,005,274.60 Issuer shares outstanding: 130,150,680 shares

3 metrics

Proposed shares for sale 98,782 Series A shares Proposed sale dated November 5, 2026

Aggregate market value $2,005,274.60 Proposed Series A sale

Issuer shares outstanding 130,150,680 shares Securities information

Key Terms

Rule 144, aggregate market value, shares outstanding

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

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.

aggregate market value financial

"Aggregate market value"

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.

shares outstanding financial

"Number of shares or other units outstanding"

Shares outstanding are the total number of a company’s stock units held by all shareholders, including institutional investors and company insiders — think of them as the total number of slices of the company’s ownership pie. Investors use this number to calculate how much of the company each share represents, and it directly affects per-share measures like earnings per share, ownership percentage and valuation; when the slice count changes, an investor’s claim and the company’s per-share metrics change too.

FAQ

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

How many KVYO Series A shares are proposed for sale, and at what value?

The proposed sale covers 98,782 Series A shares with an aggregate market value of $2,005,274.60. The proposed sale date is November 5, 2026.

Which broker and exchange are listed for the proposed KVYO sale?

Fidelity Brokerage Services LLC is listed as the broker, and NYSE is listed as the exchange for the Series A sale.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

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	0001991125
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, FLOOR 6 BOSTON MASSACHUSETTS 02110
Phone	800-338-1744
Name of Person for Whose Account the Securities are To Be Sold	Hallen Ed
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
Relationship to Issuer	Director

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	98782	2005274.60	130150680	11/05/2026	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	09/25/2012	Founders Shares	Issuer			98782	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Hodgkins Trust 125 Summer Street 6th Floor Boston MA 02110	Series A	08/31/2026	39167	801622.32
Hodgkins LLC 125 Summer Street 6th Floor Boston MA 02110	Series A	08/31/2026	59615	1221349.02
Hodgkins Trust 125 Summer Street 6th Floor Boston MA 02110	Series A	09/24/2026	500	8509.50
Hodgkins LLC 125 Summer Street 6th Floor Boston MA 02110	Series A	09/24/2026	800	13614.50
Hodgkins Trust 125 Summer Street 6th Floor Boston MA 02110	Series A	10/07/2026	38667	672750.93
Hodgkins LLC 125 Summer Street 6th Floor Boston MA 02110	Series A	10/07/2026	58815	1023315.63

144: Remarks and Signature

Remarks	Today's sale includes 59,615 shares sold from Hodgkins Llc, of which Edward W Hallen is an authorized individual and account stakeholder; and 39,167 shares sold from Hodgkins Trust, of which Edward W. Hallen is an account stakeholder. Trades in the past 3 months are also from these accounts.
Date of Notice	11/05/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/01/2026
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	/s/ Daniel Tucci, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Edward Hallen
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)