Thompson Siegel & Walmsley
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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
Q3 		$6.9M Sell
545,280
-41,776
-7% -$593K 0.13% 180
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 		$9.5M 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

Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $54.1B AUM 39.29% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $608B AUM 32.77% 1-Year Est. Return
Luther King Capital Management (LKCM)
Luther King Capital Management (LKCM) Fort Worth, Texas $24.3B AUM 19.37% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $195B AUM 21.17% 1-Year Est. Return
Barclays
Barclays London, United Kingdom $500B AUM 36.84% 1-Year Est. Return
Jefferies Financial Group
Jefferies Financial Group New York $13.5B AUM 36.68% 1-Year Est. Return
Foyston, Gordon, & Payne
Foyston, Gordon, & Payne Toronto, Ontario, Canada $499M AUM 8.83% 1-Year Est. Return
Retirement Systems of Alabama
Retirement Systems of Alabama Montgomery, Alabama $33.9B AUM 30.31% 1-Year Est. Return

Thompson Siegel & Walmsley's MAT Position: Q3 2026 in Review

Thompson Siegel & Walmsley reduced its Mattel (MAT) stake by 7.1% in Q3 2026, selling an estimated $593K and leaving 545,280 shares worth $6.9M. The position accounts for 0.13% of the portfolio, ranked #180.

Thompson Siegel & Walmsley first reported a position in MAT in Q1 2014 and has held it in 15 quarters since. The position peaked at $9.5M in Q4 2024. 174 funds tracked by Wall St. Rank hold MAT as of Q3 2026.

  • Thompson Siegel & Walmsley held 545,280 shares of Mattel worth $6.9M as of Q3 2026.
  • Thompson Siegel & Walmsley sold 41,776 Mattel shares in Q3 2026, an estimated $593K.
  • Mattel made up 0.13% of Thompson Siegel & Walmsley's portfolio in Q3 2026, its #180 holding.
  • Thompson Siegel & Walmsley first reported a position in Mattel in Q1 2014 and has held it in 15 quarters since.
  • Thompson Siegel & Walmsley's Mattel position peaked at $9.5M in Q4 2024.
  • 174 funds tracked by Wall St. Rank held Mattel as of Q3 2026.

Based on Thompson Siegel & Walmsley's 13F filing for Q3 2026, filed 5 Nov 2026.