MasterBrand (NYSE: MBC) accounting chief sells 6,000 shares

Rhea-AI Filing Summary

MasterBrand, Inc. (MBC) reported that Mark A. Young, its VP and Chief Accounting Officer, sold a total of 6,000 shares of common stock on 2026-08-25 in two open-market or private transactions at $9.15 per share. The transactions are reported as direct ownership, and post-transaction share holdings are not stated.

Insider Trade Summary

Net Seller: 6,000 shares

Net Sell 2 txns

Insider Young Mark A.

Role VP, Chief Accounting Officer

Sold 6,000 shs ($55K)

Type	Security	Shares	Price	Value
Sale	Common Stock, par value $0.01 per share	3,057	$9.15	$28K
Sale	Common Stock, par value $0.01 per share	2,943	$9.15	$27K

Holdings After Transaction: Common Stock, par value $0.01 per share — 67,020 shares (Direct)

Key Figures

Shares sold (first transaction): 3,057 shares Shares sold (second transaction): 2,943 shares Total shares sold: 6,000 shares +3 more

6 metrics

Shares sold (first transaction) 3,057 shares Common Stock sale on 2026-08-25

Shares sold (second transaction) 2,943 shares Common Stock sale on 2026-08-25

Total shares sold 6,000 shares Aggregate of two sales reported for 2026-08-25

Sale price per share $9.15 per share Price for both sales of Common Stock on 2026-08-25

Par value of Common Stock $0.01 per share Security title: Common Stock, par value $0.01 per share

Number of sale transactions 2 Two non-derivative sales of Common Stock reported

Key Terms

Common Stock, par value $0.01 per share, open market or private transaction, beneficially owned

3 terms

Common Stock, par value $0.01 per share financial

"security_title: Common Stock, par value $0.01 per share"

open market or private transaction financial

"transaction_code_description: Sale in open market or private transaction"

beneficially owned financial

"total_shares_following_transaction: shares beneficially owned following transaction"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

FAQ

What insider transaction did MBC report for Mark A. Young on this Form 4?

The filing reports that Mark A. Young, VP and Chief Accounting Officer of MasterBrand, Inc. (MBC), sold a total of 6,000 shares of common stock on 2026-08-25 in open-market or private transactions.

How many MasterBrand (MBC) shares did Mark A. Young sell and at what price?

Mark A. Young sold 6,000 shares of MasterBrand common stock on 2026-08-25, in two transactions of 3,057 and 2,943 shares, each reported at a price of $9.15 per share.

Were the reported MBC insider sales by Mark A. Young direct or indirect holdings?

Both transactions are reported under direct ownership of MasterBrand common stock, meaning the sales relate to shares held directly by Mark A. Young rather than through an intermediate entity or trust.

Does the MasterBrand (MBC) Form 4 state Mark A. Young’s remaining holdings?

No. For each reported sale, the field for shares beneficially owned following the transaction is left blank, so the filing does not specify Mark A. Young’s remaining MasterBrand share holdings.

Are the MBC insider sales by Mark A. Young under a Rule 10b5-1 trading plan?

The Form 4’s document-level Rule 10b5-1 checkbox is not marked as affirmed, and there is no footnote indicating that the reported sales were made under a Rule 10b5-1 trading plan.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/26/2026 - 11:04 AM Accepted by SEC EDGAR 08/26/2026 - 11:03 AM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Young Mark A.

(Last) (First) (Middle)

3300 ENTERPRISE PARKWAY

SUITE 300

(Street)

BEACHWOOD OHIO 44122

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
MasterBrand, Inc. [ MBC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	VP, Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/25/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.01 per share	08/25/2026	08/25/2026	S		3,057	D	$9.15	69,963	D
Common Stock, par value $0.01 per share	08/25/2026	08/25/2026	S		2,943	D	$9.15	67,020	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ Andrean R. Horton, attorney-in-fact for Mark A. Young	08/26/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)