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MasterBrand, Inc.

MBC
Exchange
NYSE
Industry
Wood Household Furniture, (No Upholstered)
SEC CIK
0001941365

In the last 90 days, MasterBrand, Inc. insiders filed 0 open-market purchases and 1 sale; 351 institutions reported holding it in 13F filings for Q2 2026, worth $2.28B in total; no superinvestor holds it.

Holders of 5% or more of MBC

Holders whose latest Schedule 13D or 13G filing reports 5% or more of MasterBrand, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of MBC
HolderLatest formStakeChangeFirst filedLatest filingFiling
BlackRock, Inc.13G/A15.20%19.4M shares–Apr 30, 20251 filingApr 30, 2025SEC
Pzena Investment Management LLC13G7.50%15.3M sharesNewJul 22, 20261 filingJul 22, 2026SEC
Coliseum Capital Management, LLC13G/A6.50%13.2M shares−3.40 ppfrom 9.90%Aug 18, 20254 filingsAug 17, 2026SEC
Gates Capital Management, Inc.13G/A6.50%13.2M shares−1.70 ppfrom 8.20%Feb 14, 20235 filingsAug 14, 2026SEC
FMR LLC13G/A6.40%13.0M shares+1.30 ppfrom 5.10%Aug 6, 20262 filingsNov 5, 2026SEC
Vanguard Capital Management LLC13G5.25%6.71M sharesNewApr 30, 20261 filingApr 30, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

25 Schedule 13D and 13G filings on MasterBrand, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on MBC
Filed (ET)FilerFormStakeChangeEvent dateFiling
Nov 5, 20261:22 PM ETFMR LLCand 1 other13G/A6.40%13.0M shares+1.30 ppfrom 5.10%Sep 30, 2026SEC
Aug 17, 20266:28 AM ETColiseum Capital Management, LLCand 4 others13G/A6.50%13.2M shares−3.40 ppfrom 9.90%Jun 30, 2026SEC
Aug 14, 20264:02 PM ETGates Capital Management, Inc.and 3 others13G/A6.50%13.2M shares−1.70 ppfrom 8.20%Jun 30, 2026SEC
Aug 6, 202610:33 AM ETFMR LLCand 1 other13G5.10%10.4M sharesNewJun 30, 2026SEC
Aug 4, 20261:39 PM ETBoston Partners13G/A0.00%0 shares−5.23 ppfrom 5.23%Below 5%Jun 30, 2026SEC
Jul 22, 20264:33 PM ETPzena Investment Management LLC13G7.50%15.3M sharesNewJun 30, 2026SEC
Jul 14, 20261:27 PM ETDimensional Fund Advisors LP13G/A4.50%9.20M shares−0.70 ppfrom 5.20%Below 5%Jun 30, 2026SEC
May 15, 20264:29 PM ETColiseum Capital Management, LLCand 4 others13G/A9.90%12.7M shares+1.30 ppfrom 8.60%Mar 31, 2026SEC
May 14, 20269:46 PM ETBoston Partners13G/A5.23%6.67M shares−1.03 ppfrom 6.26%Mar 31, 2026SEC
Apr 30, 202611:30 AM ETVanguard Capital Management LLC13G5.25%6.71M sharesNewMar 31, 2026SEC
Mar 27, 202610:35 AM ETVanguard Group Inc13G/A0.00%0 shares–Below 5%Mar 13, 2026SEC
Feb 17, 20264:54 PM ETColiseum Capital Management, LLCand 4 others13G/A8.60%11.0M shares+3.10 ppfrom 5.50%Dec 31, 2025SEC
Jan 21, 20261:21 PM ETDimensional Fund Advisors LP13G5.20%6.56M sharesNewDec 31, 2025SEC
Nov 14, 20252:05 PM ETGates Capital Management, Inc.and 3 others13G/A8.20%10.4M shares−1.30 ppfrom 9.50%Sep 30, 2025SEC
Aug 18, 20258:38 PM ETColiseum Capital Management, LLCand 4 others13G5.50%6.96M sharesNewAug 11, 2025SEC
Aug 14, 20253:44 PM ETGates Capital Management, Inc.and 3 others13G/A9.50%12.0M shares–Jun 30, 2025SEC
Aug 8, 20253:00 PM ETBoston Partners13G/A6.26%7.93M shares+0.29 ppfrom 5.97%Jun 30, 2025SEC
May 9, 20255:07 PM ETBoston Partners13G5.97%7.62M sharesNewMar 31, 2025SEC
Apr 30, 20258:00 AM ETBlackRock, Inc.13G/A15.20%19.4M shares–Mar 31, 2025SEC
Feb 14, 2024Gates Capital Management, Inc.13G/AOld format–––SEC
Feb 13, 2024Vanguard Group Inc13G/AOld format–––SEC
Jan 22, 20242:03 PM ETBlackRock Inc.13G/AOld format–––SEC
Feb 14, 2023Gates Capital Management, Inc.13GOld format–New–SEC
Feb 9, 2023Vanguard Group Inc13GOld format–New–SEC
Jan 6, 202311:49 AM ETBlackRock Inc.13GOld format–New–SEC

Form 144: proposed insider sales

7 notices from officers, directors and other affiliates planning to sell MasterBrand, Inc. shares, newest first.

Form 144 notices for MBC
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Aug 25, 20264:07 PM ETMark A YoungOfficer6.00K$54.9KAug 25, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Aug 11, 20264:21 PM ETKurt WanningerOfficer50.0K$461.1KAug 11, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Jun 10, 20264:07 PM ETBruce KendrickOfficer26.2K$236.8KJun 10, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Jun 1, 20266:29 PM ETMark A YoungOfficer11.8K$101.2KJun 1, 2026Morgan Stanley Smith Barney LLC Executive Financial ServicesSEC
Sep 13, 202412:39 PM ETMark YoungOfficer4.71K$77.0KSep 13, 2024UBS Financial Services IncSEC
Sep 11, 20244:40 PM ETAnn Fritz HackettOfficer17.6K$280.4KSep 11, 2024UBS Financial Services IncSEC
Sep 9, 20244:53 PM ETAnn Fritz HackettOfficer502$7.92KSep 9, 2024UBS Financial Services IncSEC