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Diameter Capital Partners’s MasterBrand MBC Stock Holding History

Diameter Capital 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
Q1 		$12.8M Sell
1,545,571
-4,464,839
-74% -$48.3M 1.2% 20
2025
Q4 		$66.4M Buy
6,010,410
+950,000
+19% +$11.1M 6.06% 2
2025
Q3 		$66.6M Buy
5,060,410
+4,060,410
+406% +$50.2M 4.11% 4
2025
Q2 		$10.9M Buy
+1,000,000
New +$11.1M 1.25% 15

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

Diameter Capital Partners's MBC Position: Q1 2026 in Review

Diameter Capital Partners reduced its MasterBrand (MBC) stake by 74% in Q1 2026, selling an estimated $48.3M and leaving 1,545,571 shares worth $12.8M. The position accounts for 1.2% of the portfolio, ranked #20.

Diameter Capital Partners first reported a position in MBC in Q2 2025 and has held it in 4 quarters since. The position peaked at $66.6M in Q3 2025. 335 funds tracked by Wall St. Rank hold MBC as of Q1 2026.

  • Diameter Capital Partners held 1,545,571 shares of MasterBrand worth $12.8M as of Q1 2026.
  • Diameter Capital Partners sold 4,464,839 MasterBrand shares in Q1 2026, an estimated $48.3M.
  • MasterBrand made up 1.2% of Diameter Capital Partners's portfolio in Q1 2026, its #20 holding.
  • Diameter Capital Partners first reported a position in MasterBrand in Q2 2025 and has held it in 4 quarters since.
  • Diameter Capital Partners's MasterBrand position peaked at $66.6M in Q3 2025.
  • 335 funds tracked by Wall St. Rank held MasterBrand as of Q1 2026.

Based on Diameter Capital Partners's 13F filing for Q1 2026, filed 15 May 2026.