Boston Partners’s MasterBrand MBC Stock Holding History

Boston Partners’s Portfolio MBC Stock Details MBC Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	–	Sell	-6,727,552	Closed	-$55.9M	–	828
2026 Q1	$55.9M	Sell	6,727,552 -1,969,097	-23%	-$21.3M	0.06%	251
2025 Q4	$96.5M	Sell	8,696,649 -233,550	-3%	-$2.73M	0.1%	215
2025 Q3	$118M	Buy	8,930,199 +649,960	+8%	+$8.04M	0.12%	205
2025 Q2	$90.6M	Buy	8,280,239 +452,533	+6%	+$5.01M	0.1%	216
2025 Q1	$102M	Buy	7,827,706 +2,590,583	+49%	+$39.4M	0.12%	200
2024 Q4	$76.6M	Buy	5,237,123 +2,363,308	+82%	+$40.3M	0.09%	213
2024 Q3	$53.3M	Buy	+2,873,815	New	+$46.8M	0.06%	240

Other funds holding MBC

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Pzena Investment Management New York $34.1B AUM 23.81% 1-Year Est. Return

CCM

Coliseum Capital Management Rowayton, Connecticut $1.16B AUM 23.26% 1-Year Est. Return

GCM

Gates Capital Management New York $4.16B AUM 21% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

RCM

Redwood Capital Management New York $927M AUM 153.64% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Pertento Partners London, United Kingdom $1.86B AUM 53.86% 1-Year Est. Return

Boston Partners's MBC Position: Q2 2026 in Review

Boston Partners sold out of MasterBrand (MBC) in Q2 2026, closing a stake of 6,727,552 shares — an estimated $55.9M sold.

Boston Partners first reported a position in MBC in Q3 2024 and held it in 7 quarters. The position peaked at $118M in Q3 2025. 346 funds tracked by Wall St. Rank hold MBC as of Q2 2026.

Boston Partners reported no remaining MasterBrand position as of Q2 2026 after selling out during the quarter.
Boston Partners sold 6,727,552 MasterBrand shares in Q2 2026, an estimated $55.9M.
Boston Partners first reported a position in MasterBrand in Q3 2024 and held it in 7 quarters.
Boston Partners's MasterBrand position peaked at $118M in Q3 2025.
346 funds tracked by Wall St. Rank held MasterBrand as of Q2 2026.

Based on Boston Partners's 13F filing for Q2 2026, filed 4 Aug 2026.