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 Q2	$1.59M	Buy	114,730 +72,380	+171%	+$1.06M	0.02%	756
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 $13.2B AUM 32.43% 1-Year Est. Return

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Ariel Investments Chicago, Illinois $10B AUM 42.59% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

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 Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

LSV Asset Management Chicago, Illinois $55.1B AUM 45.38% 1-Year Est. Return

Summit Trail Advisors's MAT Position: Q2 2026 in Review

Summit Trail Advisors increased its Mattel (MAT) stake by 171% in Q2 2026, buying an estimated $1.06M and bringing the position to 114,730 shares worth $1.59M. The position accounts for 0.02% of the portfolio, ranked #756.

Summit Trail Advisors first reported a position in MAT in Q4 2017 and has held it in 5 quarters since. 404 funds tracked by Wall St. Rank hold MAT as of Q2 2026.

Summit Trail Advisors held 114,730 shares of Mattel worth $1.59M as of Q2 2026.
Summit Trail Advisors bought 72,380 Mattel shares in Q2 2026, an estimated $1.06M.
Mattel made up 0.02% of Summit Trail Advisors's portfolio in Q2 2026, its #756 holding.
Summit Trail Advisors first reported a position in Mattel in Q4 2017 and has held it in 5 quarters since.
404 funds tracked by Wall St. Rank held Mattel as of Q2 2026.

Based on Summit Trail Advisors's 13F filing for Q2 2026, filed 11 Aug 2026.