CM
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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 $12.5B AUM 31.7% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
AI
Ariel Investments Chicago, Illinois $8.93B AUM 29.58% 1-Year Est. Return
SAM
Southeastern Asset Management Memphis, Tennessee $2.03B AUM 7.06% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $46.4B AUM 27.74% 1-Year Est. Return

CastleKnight Management's MAT Position: Q1 2026 in Review

CastleKnight Management increased its Mattel (MAT) stake by 106% in Q1 2026, buying an estimated $6.72M and bringing the position to 715,376 shares worth $10.4M. The position accounts for 0.17% of the portfolio, ranked #77.

CastleKnight Management first reported a position in MAT in Q2 2025 and has held it in 4 quarters since. 427 funds tracked by Wall St. Rank hold MAT as of Q1 2026.

  • CastleKnight Management held 715,376 shares of Mattel worth $10.4M as of Q1 2026.
  • CastleKnight Management bought 368,876 Mattel shares in Q1 2026, an estimated $6.72M.
  • Mattel made up 0.17% of CastleKnight Management's portfolio in Q1 2026, its #77 holding.
  • CastleKnight Management first reported a position in Mattel in Q2 2025 and has held it in 4 quarters since.
  • 427 funds tracked by Wall St. Rank held Mattel as of Q1 2026.

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