What does CUSIP 57638P104 represent in this 13F holders report?

CUSIP 57638P104 is the security identifier for MBC - MasterBrand, Inc. - Common Stock, par value $0.01 per share used to aggregate holder disclosures.

How many institutions held MBC - MasterBrand, Inc. - Common Stock, par value $0.01 per share in Q2 2026?

345 institutional investors reported MBC - MasterBrand, Inc. - Common Stock, par value $0.01 per share for Q2 2026. Use the holders table for investor-level position and value details.

MasterBrand, Inc. - Common Stock, par value $0.01 per share (MBC)

CUSIP: 57638P104

Q2 2026 13F Holders as of 30 Jun 2026

Security type / class: Equity / Common Stock, par value $0.01 per share
Total 13F shares: 221,388,297
Total 13F value: $2,277,565,638
Share change: +66,544,614
Put/Call ratio: 1344%
SEC-reported price per share: $10.29
Number of holders: 345
Value change: +$718,943,025
Number of buys: 216
Number of sells: 103
Shares outstanding: 203,078,723

Security key

57638P104

Report period

Q2 2026

Institutions

345

Top holders

MBC full security history Ownership snapshot Full 13F holder table Previous quarter: Q3 2025 MasterBrand, Inc. SEC filings MasterBrand, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 57638P104

Previous quarter: Q3 2025

Recent filing periods:

Q3 2025

Ownership snapshot

Top reported holders of MBC - MasterBrand, Inc. - Common Stock, par value $0.01 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

BlackRock, Inc.

Disclosed value leader

BlackRock, Inc.

Comparable rows

15/15

Latest evidence

30 Jun 2026

13D/G 13F 3/4/5 Lead comparable stake: 15% 13D/G row: BlackRock, Inc. Showing 1-6 of 15 holder rows.

Quick read

BlackRock, Inc. leads the comparable SEC ownership view at 15%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens BlackRock, Inc.'s linked filing trail.

Comparable ownership Top 5

BlackRock, Inc. 15%

PZENA INVESTMENT MANAGEMENT LLC 7.5%

Coliseum Capital Management, LLC 6.5%

Gates Capital Management, Inc. 6.5%

VANGUARD CAPITAL MANAGEMENT LLC 5.2%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
BlackRock, Inc.	13D/G 13F Company 13D/G 13F	15%	$233,849,689 19,358,418 shares	$0	31 Mar 2025
PZENA INVESTMENT MANAGEMENT LLC	13D/G 13F Company 13D/G 13F	7.5%	$157,740,380 15,329,483 shares	$0	30 Jun 2026
Coliseum Capital Management, LLC	13D/G 13F Company 13D/G 13F	6.5%	$114,181,012 13,200,117 shares	+$4,371,771	30 Jun 2026
Gates Capital Management, Inc.	13D/G 13F Gates Capital Management, L.P. · Company 13D/G 13F	6.5%	$114,065,422 13,186,754 shares	+$24,310,081	30 Jun 2026
VANGUARD CAPITAL MANAGEMENT LLC	13D/G 13F Vanguard Capital Management · Company 13D/G 13F	5.2%	$55,723,760 6,705,627 shares	$0	31 Mar 2026
FMR LLC	13D/G 13F Company 13D/G 13F	5.1%	$89,707,640 10,370,825 shares	$0	30 Jun 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q2 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

345

221,388,297

Rows available

345

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q2 2026 vs Q3 2025 Across Filers

Q3 2025 holders

334

Q2 2026 holders

345

Holder diff

Investor	Q3 2025 Shares	Q2 2026 Shares	Share Diff	Share Chg %	Q3 2025 value	Q2 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend