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Summit Trail Advisors’s Mattel MAT Stock Holding History

Summit Trail Advisors’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
2026
Q1 		$615K Buy
42,350
+1,041
+3% +$19K 0.01% 1100
2025
Q4 		$820K Sell
41,309
-12,349
-23% -$239K 0.01% 908
2025
Q3 		$903K Buy
+53,658
New +$978K 0.01% 891
2018
Q1 		– Sell
-663
Closed -$11K – 1161
2017
Q4 		$11K Buy
+663
New +$10.5K ﹤0.01% 1194

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

Summit Trail Advisors's MAT Position: Q1 2026 in Review

Summit Trail Advisors increased its Mattel (MAT) stake by 2.5% in Q1 2026, buying an estimated $19K and bringing the position to 42,350 shares worth $615K. The position accounts for 0.01% of the portfolio, ranked #1100.

Summit Trail Advisors first reported a position in MAT in Q4 2017 and has held it in 4 quarters since. The position peaked at $903K in Q3 2025. 425 funds tracked by Wall St. Rank hold MAT as of Q1 2026.

  • Summit Trail Advisors held 42,350 shares of Mattel worth $615K as of Q1 2026.
  • Summit Trail Advisors bought 1,041 Mattel shares in Q1 2026, an estimated $19K.
  • Mattel made up 0.01% of Summit Trail Advisors's portfolio in Q1 2026, its #1100 holding.
  • Summit Trail Advisors first reported a position in Mattel in Q4 2017 and has held it in 4 quarters since.
  • Summit Trail Advisors's Mattel position peaked at $903K in Q3 2025.
  • 425 funds tracked by Wall St. Rank held Mattel as of Q1 2026.

Based on Summit Trail Advisors's 13F filing for Q1 2026, filed 12 May 2026.