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CastleKnight Management’s Mattel MAT Stock Holding History

CastleKnight Management’s Portfolio MAT Stock Details MAT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-200,000
Closed -$3.37M – 431
2025
Q3 		$3.37M Buy
+200,000
New +$3.65M 0.07% 180

Other funds holding MAT

EIG
EdgePoint Investment Group Toronto, Ontario, Canada $13.2B AUM 32.43% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
AI
Ariel Investments Chicago, Illinois $10B AUM 42.59% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
SAM
Southeastern Asset Management Memphis, Tennessee $1.92B AUM 6.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $55.1B AUM 45.38% 1-Year Est. Return

CastleKnight Management's MAT Position: Q2 2026 in Review

CastleKnight Management increased its Mattel (MAT) stake by 9.4% in Q2 2026, buying an estimated $980K and bringing the position to 782,376 shares worth $10.9M. The position accounts for 0.15% of the portfolio, ranked #99.

CastleKnight Management first reported a position in MAT in Q2 2025 and has held it in 5 quarters since. 404 funds tracked by Wall St. Rank hold MAT as of Q2 2026.

  • CastleKnight Management held 782,376 shares of Mattel worth $10.9M as of Q2 2026.
  • CastleKnight Management bought 67,000 Mattel shares in Q2 2026, an estimated $980K.
  • Mattel made up 0.15% of CastleKnight Management's portfolio in Q2 2026, its #99 holding.
  • CastleKnight Management first reported a position in Mattel in Q2 2025 and has held it in 5 quarters since.
  • 404 funds tracked by Wall St. Rank held Mattel as of Q2 2026.

Based on CastleKnight Management's 13F filing for Q2 2026, filed 14 Aug 2026.