MasterBrand (NYSE: MBC) CFO buys stock and is awarded 105,018 RSUs

Rhea-AI Filing Summary

MasterBrand, Inc. EVP & CFO Simon Andrea Helen reported two equity transactions. On June 4, 2026, she bought 5,000 shares of common stock in an open-market purchase at $8.56 per share. On June 3, 2026, she received a grant of 105,018 restricted stock units, which vest in stages between 2027 and 2029. Following these transactions, her direct holdings increased to 497,341 shares, including 244,973 RSUs that have not yet vested.

Insights

Equity compensation and insider-trading analyst

CFO receives large RSU grant and makes a modest open-market share purchase.

MasterBrand EVP & CFO Simon Andrea Helen reported a grant of 105,018 restricted stock units and an open-market purchase of 5,000 shares at $8.56. RSUs are stock-based compensation that convert into common shares as they vest.

The RSU award vests over several years: 17,503 units in equal thirds beginning on June 3, 2027, and 87,515 units in equal halves on June 3, 2028 and June 3, 2029. This structure encourages longer-term retention and alignment with shareholder outcomes.

After these transactions, the CFO directly holds 497,341 shares, including 244,973 unvested RSUs. The 5,000-share open-market purchase is relatively small versus her total position, so the overall signal is routine rather than transformational for MasterBrand, Inc..

Insider Trade Summary

Net Buyer: 5,000 shares ($42,800)

Net Buy 2 txns

Insider Simon Andrea Helen

Role EVP & CFO

Bought 5,000 shs ($43K)

Type	Security	Shares	Price	Value
Purchase	Common Stock, par value $0.01 per share	5,000	$8.56	$43K
Grant/Award	Common Stock, par value $0.01 per share	105,018	$0.00	--

Holdings After Transaction: Common Stock, par value $0.01 per share — 497,341 shares (Direct, null)

Footnotes (1)

1. Represents shares of restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of common stock of MasterBrand, Inc. The RSUs vest as follows: (i) 17,503 in equal one-third increments over three years beginning on June 3, 2027 and (ii) 87,515 in equal one-half increments on June 3, 2028 and June 3, 2029. Includes 244,973 RSUs that have not yet vested.

Key Figures

Open-market purchase: 5,000 shares at $8.56 RSU grant size: 105,018 RSUs Post-transaction holdings: 497,341 shares +3 more

6 metrics

Open-market purchase 5,000 shares at $8.56 CFO common stock buy on June 4, 2026

RSU grant size 105,018 RSUs CFO equity award on June 3, 2026

Post-transaction holdings 497,341 shares Direct common stock holdings after transactions

Unvested RSUs 244,973 RSUs Equity awards that have not yet vested

RSUs vesting schedule (tranche 1) 17,503 RSUs Vest in equal one-third increments starting June 3, 2027

RSUs vesting schedule (tranche 2) 87,515 RSUs Vest in equal one-half increments on June 3, 2028 and June 3, 2029

Key Terms

restricted stock units ("RSUs"), open-market purchase, grant, award, or other acquisition, vest, +1 more

5 terms

restricted stock units ("RSUs") financial

"Represents shares of restricted stock units ("RSUs") granted to the reporting person."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

open-market purchase financial

"transaction_action": "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

vest financial

"The RSUs vest as follows: (i) 17,503 in equal one-third increments over three years"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

unvested financial

"Includes 244,973 RSUs that have not yet vested."

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Form 4 Insider Transactions: What Each Field Means →

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^*

Simon Andrea Helen

(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)
	EVP & CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/03/2026

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	06/03/2026		A		105,018(1)	A	$0	492,341(2)	D
Common Stock, par value $0.01 per share	06/04/2026		P		5,000	A	$8.56	497,341(2)	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:

1. Represents shares of restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of common stock of MasterBrand, Inc. The RSUs vest as follows: (i) 17,503 in equal one-third increments over three years beginning on June 3, 2027 and (ii) 87,515 in equal one-half increments on June 3, 2028 and June 3, 2029.

2. Includes 244,973 RSUs that have not yet vested.

Remarks:

	/s/ Andrean R. Horton, attorney-in-fact for Andrea H. Simon	06/05/2026
	** 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)

FAQ

What insider transactions did MasterBrand (MBC) report for its CFO?

MasterBrand’s EVP & CFO Simon Andrea Helen reported two transactions: an open-market purchase of 5,000 common shares at $8.56 each and a grant of 105,018 restricted stock units. These moves increased her direct equity-based exposure to MasterBrand stock.

How many MasterBrand (MBC) shares does the CFO hold after the Form 4?

After the reported transactions, the CFO directly holds 497,341 MasterBrand common shares. This total includes both standard shares and 244,973 restricted stock units that have not yet vested, reflecting substantial ongoing equity exposure to the company.

What price did the MasterBrand (MBC) CFO pay in the latest stock purchase?

In the latest transaction, the CFO bought 5,000 MasterBrand common shares in an open-market purchase at $8.56 per share. This buy occurred on June 4, 2026, and represents a relatively small addition compared with her overall shareholdings.

What are the terms of the CFO’s 105,018 MasterBrand (MBC) RSU grant?

The 105,018 restricted stock units vest in stages over several years. 17,503 RSUs vest in equal one-third increments starting June 3, 2027, while 87,515 RSUs vest in equal one-half increments on June 3, 2028 and June 3, 2029, encouraging long-term retention.

What does it mean that the MasterBrand (MBC) CFO holds unvested RSUs?

Unvested RSUs are promised shares that the CFO will receive only if vesting conditions are met over time. The filing notes she holds 244,973 RSUs not yet vested, which represent future potential share ownership tied to continued service and performance periods.