William L. Waszak - 15 Oct 2026 Form 3 Insider Report for MasterBrand, Inc. (MBC)

Reporting relationship: EVP Chief Digital & Technology
Issuer ticker: MBC
Reported as of: 15 Oct 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 26 Oct 2026, 17:11:25 UTC
Prior SEC filing: 29 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Andrean R. Horton, Attorney-in-Fact

Filing notes and source

Key filing fact

William L. Waszak filed Form 3 for MasterBrand, Inc. (MBC) on 26 Oct 2026.

Key facts

This page summarizes William L. Waszak's Form 3 filing for MasterBrand, Inc. (MBC).
0 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 26 Oct 2026, 17:11.

Change

Previous filing in this sequence was filed on 29 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0002058853 Primary reporting owner

WASZAK WILLIAM L

Relationship: EVP Chief Digital & Technology
Address: 3300 ENTERPRISE PARKWAY, SUITE 300, BEACHWOOD
Signature: /s/ Andrean R. Horton, Attorney-in-Fact
Signature date: 26 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MBC holding

Common Stock, par value $0.01 per share

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 70,706
Date: 15 Oct 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 15 Oct 2026
Ownership: Direct
Underlying class: Common Stock, par value $0.01 per share
Underlying amount: 76,923
Exercise price: $0.000000
Footnotes: F1, F2

MBC holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 15 Oct 2026
Ownership: Direct
Underlying class: Common Stock, par value $0.01 per share
Underlying amount: 52,007
Exercise price: $0.000000
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Represents 76,923 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 50% on June 3, 2028 and 50% on June 3, 2029, subject to the reporting person's continued service through the applicable vesting date.

Footnote F2

No expiration date.

Footnote F3

Represents 52,007 restricted stock units of MasterBrand, Inc. resulting from the conversion of performance share units originally granted by American Woodmark Corporation. Each restricted stock unit represents a contingent right to receive one share of MasterBrand, Inc. common stock. The restricted stock units are scheduled to settle in February 2027 pursuant to the terms of the applicable award.