Thompson Siegel & Walmsley’s Mattel MAT Stock Holding History

Thompson Siegel & Walmsley’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	$8.15M	Sell	587,056 -34,457	-6%	-$504K	0.15%	160
2026 Q1	$9.03M	Buy	621,513 +333,713	+116%	+$6.08M	0.16%	139
2025 Q4	$5.71M	Sell	287,800 -247,506	-46%	-$4.78M	0.1%	204
2025 Q3	$9.01M	Buy	535,306 +131,696	+33%	+$2.4M	0.15%	143
2025 Q2	$7.96M	Sell	403,610 -5,144	-1%	-$91.6K	0.13%	153
2025 Q1	$7.94M	Sell	408,754 -128,933	-24%	-$2.56M	0.13%	143
2024 Q4	$9.53M	Buy	537,687 +65,379	+14%	+$1.24M	0.15%	140
2024 Q3	$9M	Buy	+472,308	New	+$8.7M	0.13%	145
2017 Q4	–	Sell	-280	Closed	-$4K	–	861
2017 Q3	$4K	Sell	280 -850	-75%	-$15.2K	﹤0.01%	795
2017 Q2	$24K	Buy	+1,130	New	+$25.5K	﹤0.01%	628
2015 Q2	–	Sell	-93	Closed	-$2K	–	713
2015 Q1	$2K	Buy	+93	New	+$2.47K	﹤0.01%	681
2014 Q4	–	Sell	-65	Closed	-$2K	–	708
2014 Q3	$2K	Hold	65	–	–	﹤0.01%	672
2014 Q2	$3K	Hold	65	–	–	﹤0.01%	637
2014 Q1	$3K	Buy	+65	New	+$2.58K	﹤0.01%	638

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

Thompson Siegel & Walmsley's MAT Position: Q2 2026 in Review

Thompson Siegel & Walmsley reduced its Mattel (MAT) stake by 5.5% in Q2 2026, selling an estimated $504K and leaving 587,056 shares worth $8.15M. The position accounts for 0.15% of the portfolio, ranked #160.

Thompson Siegel & Walmsley first reported a position in MAT in Q1 2014 and has held it in 14 quarters since. The position peaked at $9.53M in Q4 2024. 403 funds tracked by Wall St. Rank hold MAT as of Q2 2026.

Thompson Siegel & Walmsley held 587,056 shares of Mattel worth $8.15M as of Q2 2026.
Thompson Siegel & Walmsley sold 34,457 Mattel shares in Q2 2026, an estimated $504K.
Mattel made up 0.15% of Thompson Siegel & Walmsley's portfolio in Q2 2026, its #160 holding.
Thompson Siegel & Walmsley first reported a position in Mattel in Q1 2014 and has held it in 14 quarters since.
Thompson Siegel & Walmsley's Mattel position peaked at $9.53M in Q4 2024.
403 funds tracked by Wall St. Rank held Mattel as of Q2 2026.

Based on Thompson Siegel & Walmsley's 13F filing for Q2 2026, filed 11 Aug 2026.