MBC SCHEDULE 13G/A: SEC filing

An amendment to a Schedule 13G was

Filed with the SEC on Aug 14, 2026 · accession 0001172661-26-003732

MBC filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Aug 14, 2026. An amendment to a Schedule 13G was filed regarding MasterBrand, Inc. (MBC), indicating a change in a passive institutional holder's ownership position. The stock moved -1.5% by the first close after the filing.

Summary of the filing

An amendment to a Schedule 13G was filed regarding MasterBrand, Inc. (MBC), indicating a change in a passive institutional holder's ownership position. The filing text provided does not disclose specific ownership percentages or share counts.

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Key details

IssuerMasterBrand, Inc.

How MBC stock reacted

Close before

$9.29

Aug 13, 2026

First close after

-1.51%

$9.15

5 trading days

-1.61%

$9.14

Since filing

-27.66%

$6.72

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Frequently asked questions

What did MBC file with the SEC on Aug 14, 2026?

MBC filed a SCHEDULE 13G/A (SEC filing). An amendment to a Schedule 13G was filed regarding MasterBrand, Inc. (MBC), indicating a change in a passive institutional holder's ownership position. The filing text provided does not disclose specific ownership percentages or share counts.

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did MBC stock react to this filing?

MBC closed at $9.29 before the filing and $9.15 on Aug 14, 2026 (-1.51%). Five trading days later: $9.14 (-1.61%).

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