MasterBrand (MBC) director David Petratis acquires 11,587 shares in open-market buy

Rhea-AI Filing Summary

MasterBrand, Inc. director David D. Petratis bought shares of the company’s common stock in the open market. He purchased 11,587 shares at a volume-weighted average price of $8.8237 per share, in multiple trades between $8.80 and $8.85.

After this purchase, Petratis directly owns 69,915 shares of MasterBrand common stock. This total includes 31,893 restricted stock units that have not yet vested and 26,435 shares whose receipt has been deferred under the company’s deferred compensation plan.

Insider Trade Summary

Net Buyer: 11,587 shares ($102,240)

Net Buy 1 txn

Insider PETRATIS DAVID D

Role null

Bought 11,587 shs ($102K)

Type	Security	Shares	Price	Value
Purchase	Common Stock, par value $0.01 per share	11,587	$8.8237	$102K

Holdings After Transaction: Common Stock, par value $0.01 per share — 69,915 shares (Direct, null)

Footnotes (1)

1. The shares were purchased in multiple transactions at prices ranging from $8.80 to $8.85 per share. The price reported reflects the volume weighted average price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased at each separate price. Includes a total of 31,893 RSUs that have not vested and 26,435 shares, the receipt of which has been deferred under the issuer's deferred compensation plan.

Key Figures

Shares purchased: 11,587 shares Purchase VWAP: $8.8237 per share Trade price range: $8.80–$8.85 per share +3 more

6 metrics

Shares purchased 11,587 shares Open-market purchase on June 8, 2026

Purchase VWAP $8.8237 per share Volume-weighted average purchase price

Trade price range $8.80–$8.85 per share Range of prices across multiple trades

Total shares after transaction 69,915 shares Beneficial ownership following purchase

Unvested RSUs 31,893 units Restricted stock units not yet vested

Deferred shares 26,435 shares Receipt deferred under deferred compensation plan

Key Terms

volume weighted average price, RSUs, deferred compensation plan

3 terms

volume weighted average price financial

"The price reported reflects the volume weighted average price for the transactions."

The volume weighted average price (VWAP) is a way to measure the average price of a security, such as a stock, over a specific period, taking into account how many units were traded at each price. It’s similar to calculating the average cost of items bought when some are more frequently purchased than others. Investors use VWAP to assess whether a security is being bought or sold at a fair price during trading.

RSUs financial

"Includes a total of 31,893 RSUs that have not vested"

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

deferred compensation plan financial

"shares, the receipt of which has been deferred under the issuer's deferred compensation plan."

A deferred compensation plan is an arrangement where an employer agrees to pay part of an employee’s pay or bonus at a later date instead of immediately, often to reduce current tax bills or to tie rewards to long-term performance. For investors it matters because these promises create future cash obligations and influence executive incentives and retention; they can affect a company’s reported liabilities, cash flow planning and the risk profile if the business faces financial trouble.

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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^*

PETRATIS DAVID D

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/08/2026

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	06/08/2026		P		11,587	A	$8.8237(1)	69,915(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. The shares were purchased in multiple transactions at prices ranging from $8.80 to $8.85 per share. The price reported reflects the volume weighted average price for the transactions. The reporting person undertakes to provide upon request by the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased at each separate price.

2. Includes a total of 31,893 RSUs that have not vested and 26,435 shares, the receipt of which has been deferred under the issuer's deferred compensation plan.

Remarks:

	/s/ Andrean R. Horton, attorney-in-fact for David D. Petratis	06/09/2026
	** 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 transaction did MasterBrand (MBC) report for David D. Petratis?

MasterBrand reported that director David D. Petratis made an open-market purchase of company stock. He bought 11,587 shares of common stock on June 8, 2026 at a volume-weighted average price of $8.8237 per share, across multiple trades.

At what prices did David D. Petratis buy MasterBrand (MBC) shares?

David D. Petratis purchased MasterBrand shares in several trades between $8.80 and $8.85 per share. The Form 4 reports a volume-weighted average purchase price of $8.8237 per share for the 11,587 total shares acquired in this transaction.

How many MasterBrand (MBC) shares does David D. Petratis own after this transaction?

After the reported purchase, David D. Petratis beneficially owns 69,915 MasterBrand common shares. This figure includes 31,893 unvested restricted stock units and 26,435 shares whose receipt has been deferred under MasterBrand’s deferred compensation plan, in addition to already held shares.

What does the Form 4 say about the pricing of MasterBrand (MBC) insider trades?

The Form 4 notes that the MasterBrand shares were bought in multiple transactions between $8.80 and $8.85 per share. It reports a volume-weighted average price of $8.8237 and states full trade-by-trade pricing details are available upon request from the company or SEC staff.

Are restricted stock units included in David D. Petratis’s MasterBrand (MBC) holdings?

Yes. The reported total of 69,915 MasterBrand shares for David D. Petratis includes 31,893 restricted stock units that have not vested. It also includes 26,435 shares whose receipt has been deferred under the company’s deferred compensation plan, as disclosed in the footnotes.