AAM
MBC icon

ACK Asset Management’s MasterBrand MBC Stock Holding History

ACK Asset Management’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
Q1 		$30.7M Buy
3,700,000
+1,400,000
+61% +$15.1M 3.84% 15
2025
Q4 		$25.4M Hold
2,300,000
– – 3.19% 18
2025
Q3 		$30.3M Buy
+2,300,000
New +$28.4M 3.79% 15
2025
Q2 		– Sell
-1,302,500
Closed -$17M – 24
2025
Q1 		$17M Sell
1,302,500
-172,500
-12% -$2.62M 2.79% 15
2024
Q4 		$21.5M Buy
1,475,000
+825,000
+127% +$14.1M 2.89% 15
2024
Q3 		$12.1M Buy
+650,000
New +$10.6M 1.49% 16

Other funds holding MBC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
CCM
Coliseum Capital Management Rowayton, Connecticut $1.22B AUM 18.72% 1-Year Est. Return
GCM
Gates Capital Management New York $3.66B AUM 12.63% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
PP
Pertento Partners London, United Kingdom $1.37B AUM 36.36% 1-Year Est. Return
SSP
Sixth Street Partners Dallas, Texas $711M AUM 9.3% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

ACK Asset Management's MBC Position: Q1 2026 in Review

ACK Asset Management increased its MasterBrand (MBC) stake by 61% in Q1 2026, buying an estimated $15.1M and bringing the position to 3,700,000 shares worth $30.7M. The position accounts for 3.84% of the portfolio, ranked #15.

ACK Asset Management first reported a position in MBC in Q3 2024 and has held it in 6 quarters since. 334 funds tracked by Wall St. Rank hold MBC as of Q1 2026.

  • ACK Asset Management held 3,700,000 shares of MasterBrand worth $30.7M as of Q1 2026.
  • ACK Asset Management bought 1,400,000 MasterBrand shares in Q1 2026, an estimated $15.1M.
  • MasterBrand made up 3.84% of ACK Asset Management's portfolio in Q1 2026, its #15 holding.
  • ACK Asset Management first reported a position in MasterBrand in Q3 2024 and has held it in 6 quarters since.
  • 334 funds tracked by Wall St. Rank held MasterBrand as of Q1 2026.

Based on ACK Asset Management's 13F filing for Q1 2026, filed 15 May 2026.