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Lee Ainslie’s MasterBrand MBC Stock Holding History

Lee Ainslie’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
2025
Q3 		– Sell
-40,293
Closed -$440K – 285
2025
Q2 		$440K Hold
40,293
– – 0.01% 246
2025
Q1 		$526K Buy
40,293
+22,179
+122% +$337K 0.01% 215
2024
Q4 		$265K Sell
18,114
-102,012
-85% -$1.74M ﹤0.01% 203
2024
Q3 		$2.23M Buy
120,126
+16,813
+16% +$274K 0.04% 98
2024
Q2 		$1.52M Buy
103,313
+79,328
+331% +$1.31M 0.03% 158
2024
Q1 		$449K Buy
+23,985
New +$380K 0.01% 245

Other funds holding MBC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
GCM
Gates Capital Management New York $4.16B AUM 21% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
CCM
Coliseum Capital Management Rowayton, Connecticut $1.16B AUM 23.26% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
DCP
Diameter Capital Partners New York $1.24B AUM 137.67% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Pzena Investment Management
Pzena Investment Management New York $34.1B AUM 23.81% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Lee Ainslie's MBC Position: Q3 2025 in Review

Lee Ainslie sold out of MasterBrand (MBC) in Q3 2025, closing a stake of 40,293 shares — an estimated $440K sold.

Lee Ainslie first reported a position in MBC in Q1 2024 and held it in 6 quarters. The position peaked at $2.23M in Q3 2024. 337 funds tracked by Wall St. Rank hold MBC as of Q3 2025.

  • Lee Ainslie reported no remaining MasterBrand position as of Q3 2025 after selling out during the quarter.
  • Lee Ainslie sold 40,293 MasterBrand shares in Q3 2025, an estimated $440K.
  • Lee Ainslie first reported a position in MasterBrand in Q1 2024 and held it in 6 quarters.
  • Lee Ainslie's MasterBrand position peaked at $2.23M in Q3 2024.
  • 337 funds tracked by Wall St. Rank held MasterBrand as of Q3 2025.

Based on Maverick Capital's 13F filing for Q3 2025, filed 14 Nov 2025.