Morgan Stanley files to sell 28,000 RSUs

Morgan Stanley Smith Barney LLC filed a Form 144 reporting a proposed sale of 28,000 Restricted Stock Units dated 11/15/2025.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC filed a Form 144 reporting a proposed sale of 28,000 Restricted Stock Units dated 11/15/2025. The filing lists two prior 10b5-1 sales by Amanda Whalen: 14,000 shares on 02/13/2026 for $264,356.40 and 14,000 shares on 03/12/2026 for $274,108.80.

Insights

Securities Compliance Officer

Form 144 lists a proposed sale of 28,000 RSUs and recent 10b5-1 dispositions totaling 28,000 shares.

The filing records a proposed transfer of 28,000 Restricted Stock Units (dated 11/15/2025) from Morgan Stanley Smith Barney LLC as intermediary. It also documents two executed 10b5-1 sales by Amanda Whalen for 14,000 shares each on 02/13/2026 and 03/12/2026, with proceeds of $264,356.40 and $274,108.80, respectively.

These entries are routine compliance notices that disclose planned and recent transactions under Rule 144 and pre-arranged 10b5-1 plans. Subsequent filings may record actual settlement details or additional dispositions.

Key Figures

Securities to be sold: 28,000 shares 10b5-1 sale: 14,000 shares 10b5-1 sale: 14,000 shares +1 more

4 metrics

Securities to be sold 28,000 shares Restricted Stock Units dated 11/15/2025

10b5-1 sale 14,000 shares Sale on 02/13/2026 for $264,356.40

10b5-1 sale 14,000 shares Sale on 03/12/2026 for $274,108.80

Filing date (header) 04/16/2026 Date shown in filing header

Key Terms

Restricted Stock Units, 10b5-1 Sales, Form 144

3 terms

Restricted Stock Units financial

"Restricted Stock Units | Issuer | 28000 | 11/15/2025"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

10b5-1 Sales regulatory

"10b5-1 Sales for AMANDA WHALEN | Common | 03/12/2026 | 14000"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

FAQ

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

What does KVYO's Form 144 report about the securities to be sold?

The Form 144 reports a proposed sale of 28,000 Restricted Stock Units dated 11/15/2025. It lists Morgan Stanley Smith Barney LLC as the broker-dealer handling the sale and identifies the instrument as RSUs.

Which recent 10b5-1 sales are disclosed in the KVYO filing?

The filing discloses two 10b5-1 sales by Amanda Whalen of 14,000 shares each on 02/13/2026 and 03/12/2026. Reported proceeds were $264,356.40 and $274,108.80, respectively.

Who is listed as the broker-dealer on the KVYO Form 144?

The broker-dealer listed is Morgan Stanley Smith Barney LLC, located at 1 New York Plaza, 8th Floor, New York, NY. The filing pairs this intermediary with the proposed sale of 28,000 RSUs.

Does the Form 144 show whether proceeds go to the issuer or selling holder?

The Form 144 identifies the securities as Restricted Stock Units and lists the sale method, but it does not state a use-of-proceeds allocation in the excerpt provided. The entry names the issuer-type and broker-dealer.

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

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Accepted by SEC EDGAR 04/16/2026 - 04:11 PM 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	0001991131
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, 6th Floor Boston MASSACHUSETTS 02110
Phone	6172131788
Name of Person for Whose Account the Securities are To Be Sold	AMANDA WHALEN
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

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
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	28000	514360.00	145497436	04/16/2026	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 *
Common	11/15/2025	Restricted Stock Units	Issuer			28000	11/15/2025	N/A

* 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
10b5-1 Sales for AMANDA WHALEN 125 Summer Street, 6th Floor Boston MA 02110	Common	03/12/2026	14000	274108.80
10b5-1 Sales for AMANDA WHALEN 125 Summer Street, 6th Floor Boston MA 02110	Common	02/13/2026	14000	264356.40

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 11/15/2025 through 02/15/2026.
Date of Notice	04/16/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/21/2025
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/ Amanda Whalen
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)