Dimensional Fund Advisors reports 4.5% Masterbrand Inc (NYSE: MBC) stake

Rhea-AI Filing Summary

Dimensional Fund Advisors LP filed an amended Schedule 13G reporting beneficial ownership of 9,195,469 shares of Masterbrand Inc common stock, representing 4.5% of the class as of June 30, 2026. The firm reports sole voting power over 8,997,218 shares and sole dispositive power over 9,195,469 shares, with no shared voting or dispositive power.

The shares are owned by various funds and accounts for which Dimensional or its subsidiaries act as investment adviser or manager, and Dimensional states it may be deemed the beneficial owner but disclaims beneficial ownership. Each underlying fund’s interest is stated to be less than 5% of the class.

Key Figures

Beneficial ownership: 9,195,469 shares Percent of class: 4.5% Sole voting power: 8,997,218 shares +3 more

6 metrics

Beneficial ownership 9,195,469 shares Common stock of Masterbrand Inc beneficially owned as of 06/30/2026

Percent of class 4.5% Portion of Masterbrand Inc common stock class reported as owned

Sole voting power 8,997,218 shares Shares of Masterbrand Inc over which Dimensional has sole voting power

Sole dispositive power 9,195,469 shares Shares of Masterbrand Inc over which Dimensional has sole dispositive power

Shared voting power 0 shares Shares with shared power to vote or direct the vote

Shared dispositive power 0 shares Shares with shared power to dispose or direct disposition

Key Terms

beneficial owner, Sole Voting Power, dispositive power, Investment Company Act of 1940, +2 more

6 terms

beneficial owner financial

"may be deemed to be the beneficial owner of the shares of the Issuer"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

Sole Voting Power financial

"5 | Sole Voting Power 8,997,218.00 6 | Shared Voting Power 0.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

dispositive power financial

"Sole Dispositive Power 9,195,469.00 8 | Shared Dispositive Power 0.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Investment Company Act of 1940 regulatory

"furnishes investment advice to four investment companies registered under the Investment Company Act of 1940"

A U.S. federal law that sets the rulebook for pooled investment vehicles such as mutual funds, exchange-traded funds and similar money managers, requiring them to register with regulators, disclose holdings and fees, limit conflicts of interest, and follow governance standards. It matters to investors because these protections and transparency rules act like a referee and scoreboard, helping people compare funds, trust that managers follow fair practices, and spot hidden costs or risks.

separate accounts financial

"commingled funds, group trusts and separate accounts (such investment companies, trusts and accounts, collectively"

Separate accounts are pools of investments that a financial firm keeps apart from its main assets to manage for a specific client, insurance product, or institutional mandate. They matter to investors because the account’s gains, losses and risks apply only to the clients linked to it rather than the firm overall, so returns and protections can differ from pooled or company‑backed assets—think of it like a private toolbox reserved for a single job instead of shared with everyone.

Schedule 13(d) regulatory

"for any other purposes than Section 13(d) of the Securities Exchange Act of 1934"

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Available on EDGAR 07/14/2026 - 01:28 PM Accepted by SEC EDGAR 07/14/2026 - 01:27 PM Learn about SEC filing dates

FAQ

What stake does Dimensional Fund Advisors report in Masterbrand Inc (MBC)?

Dimensional Fund Advisors reports beneficial ownership of 9,195,469 shares, or 4.5% of Masterbrand Inc’s common stock as of June 30, 2026. It reports sole voting power over 8,997,218 shares and sole dispositive power over 9,195,469 shares, with no shared powers.

Who is the actual owner of the Masterbrand Inc (MBC) shares reported by Dimensional?

The reported shares are owned by various Funds advised or managed by Dimensional Fund Advisors LP or its subsidiaries. Dimensional may possess voting and/or investment power and may be deemed a beneficial owner, but it expressly disclaims beneficial ownership of all such securities.

How much voting and dispositive power does Dimensional have over MBC shares?

Dimensional reports sole voting power over 8,997,218 Masterbrand Inc shares and sole dispositive power over 9,195,469 shares. It reports no shared voting or dispositive power, indicating control over how these shares are voted and whether they are sold, subject to fund arrangements.

What does the 4.5% ownership level in Masterbrand Inc (MBC) signify?

Dimensional’s holding of 4.5% of Masterbrand Inc’s common stock means it owns more than 0% but no more than 5% of the class. The filing specifically characterizes the position under “Ownership of 5 percent or less of a class,” highlighting it is below the 5% threshold.

Do any individual Dimensional-managed funds own over 5% of Masterbrand Inc (MBC)?

According to the filing, the Funds advised or managed by Dimensional have rights to dividends and sale proceeds, but, to Dimensional’s knowledge, no single Fund holds more than 5% of Masterbrand Inc’s common stock. Dimensional again disclaims beneficial ownership of all such securities.

What type of entity is Dimensional Fund Advisors in relation to Masterbrand Inc (MBC)?

Dimensional Fund Advisors LP is described as a Delaware limited partnership and an investment adviser registered under the Investment Advisers Act of 1940. It provides investment advice and management to various registered investment companies, commingled funds, group trusts, and separate accounts holding Masterbrand shares.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Masterbrand Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

57638P104

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 57638P104

1

Names of Reporting Persons

Dimensional Fund Advisors LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 8,997,218.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 9,195,469.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,195,469.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.5 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Masterbrand Inc
(b)	Address of issuer's principal executive offices: 1 Masterbrand Cabinets Dr, Jasper, IN 47546
Item 2.
(a)	Name of person filing: Dimensional Fund Advisors LP
(b)	Address or principal business office or, if none, residence: 6300 Bee Cave Road, Building One, Austin, TX 78746
(c)	Citizenship: Delaware Limited Partnership
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 57638P104
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 9,195,469 ** see Note 1 ** ** Note 1 ** Dimensional Fund Advisors LP, an investment adviser registered under Section 203 of the Investment Advisors Act of 1940, furnishes investment advice to four investment companies registered under the Investment Company Act of 1940, and serves as investment manager or sub-adviser to certain other commingled funds, group trusts and separate accounts (such investment companies, trusts and accounts, collectively referred to as the "Funds"). In certain cases, subsidiaries of Dimensional Fund Advisors LP may act as an adviser or sub-adviser to certain Funds. In its role as investment advisor, sub-adviser and/or manager, Dimensional Fund Advisors LP or its subsidiaries (collectively, "Dimensional") may possess voting and/or investment power over the securities of the Issuer that are owned by the Funds, and may be deemed to be the beneficial owner of the shares of the Issuer held by the Funds. However, all securities reported in this schedule are owned by the Funds. Dimensional disclaims beneficial ownership of such securities. In addition, the filing of this Schedule 13G shall not be construed as an admission that the reporting person or any of its affiliates is the beneficial owner of any securities covered by this Schedule 13G for any other purposes than Section 13(d) of the Securities Exchange Act of 1934.
(b)	Percent of class: 4.5 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 8,997,218** see Note 1 **
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 9,195,469** see Note 1 **
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Funds described in Note 1 above have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the securities held in their respective accounts. To the knowledge of Dimensional, the interest of any one such Fund does not exceed 5% of the class of securities. Dimensional Fund Advisors LP disclaims beneficial ownership of all such securities.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dimensional Fund Advisors LP

Signature:	Selwyn Notelovitz
Name/Title:	Global Chief Compliance Officer
Date:	07/14/2026