MS SSB proposes sale of MBC common shares

Morgan Stanley Smith Barney LLC Executive Financial Services submitted a Form 144 notice related to proposed sales of Common shares of MBC (listed NYSE).

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC Executive Financial Services submitted a Form 144 notice related to proposed sales of Common shares of MBC (listed NYSE). The excerpt lists specific restricted‑stock lots dated 02/28/2025 and 02/28/2026, including 1,839; 4,121; 3,521; and 2,284 shares.

Key Figures

Restricted stock lot: 1,839 shares Restricted stock lot: 4,121 shares Restricted stock lot: 3,521 shares +3 more

6 metrics

Restricted stock lot 1,839 shares dated 02/28/2025

Restricted stock lot 4,121 shares dated 02/28/2026

Restricted stock lot 3,521 shares dated 02/28/2026

Restricted stock lot 2,284 shares dated 02/28/2026

Exchange listing NYSE header field

Header numeric field 127,984,590 numeric entry in header row

Key Terms

Restricted Stock, Form 144, NYSE

3 terms

Restricted Stock financial

"Common | 02/28/2025 | Restricted Stock | Issuer"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

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.

NYSE market

"06/01/2026 | NYSE"

A large, regulated marketplace where stocks and other securities are listed and traded, acting like a global auction house that matches buyers and sellers and helps determine share prices. It matters to investors because listing and trading there provide liquidity, price discovery, and regulatory oversight—making it easier to buy or sell holdings and giving companies a visible platform that can affect credibility and access to capital.

FAQ

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

What does the Form 144 filing for MBC mean?

It notifies the SEC of a proposed sale of restricted shares by an affiliate. The filing lists specific restricted stock lots and share counts (1,839; 4,121; 3,521; 2,284) tied to dated grant entries in the excerpt.

Who is the filer in the MBC Form 144 notice?

The filer is Morgan Stanley Smith Barney LLC Executive Financial Services. The excerpt shows that entity as the reporting broker/dealer associated with the proposed share lots for MBC.

How many MBC shares are listed in the excerpt for sale?

The excerpt lists four restricted‑stock lots totaling listed counts: 1,839; 4,121; 3,521; and 2,284 shares. The filing excerpt does not aggregate these numbers into a single total.

Does the filing specify how the shares will be sold on the market?

The provided excerpt does not describe distribution methods or sale mechanics. It only lists security type, dates, and share counts for the restricted stock lots visible in the excerpt.

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

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Accepted by SEC EDGAR 06/01/2026 - 06:29 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	0001630133
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	MasterBrand, Inc.
SEC File Number	001-41545
Address of Issuer	3300 Enterprise Parkway, Suite 300 Beachwood OHIO 44122
Phone	877-622-4782
Name of Person for Whose Account the Securities are To Be Sold	MARK A YOUNG
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	11765	101179.00	127984590	06/01/2026	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	02/28/2025	Restricted Stock	Issuer			1839	02/28/2025	Not Applicable
Common	02/28/2026	Restricted Stock	Issuer			4121	02/28/2026	Not Applicable
Common	02/28/2026	Restricted Stock	Issuer			3521	02/28/2026	Not Applicable
Common	02/28/2026	Restricted Stock	Issuer			2284	02/28/2026	Not Applicable

* 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	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/ Mark A Young
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)