Mariner
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Mariner’s Mattel MAT Stock Holding History

Mariner’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 		– Sell
-15,838
Closed -$315K – 3718
2025
Q4 		$315K Sell
15,838
-2,440
-13% -$47.1K ﹤0.01% 2794
2025
Q3 		$308K Sell
18,278
-29,912
-62% -$545K ﹤0.01% 2785
2025
Q2 		$950K Buy
48,190
+14,861
+45% +$264K ﹤0.01% 1831
2025
Q1 		$648K Buy
33,329
+18,232
+121% +$362K ﹤0.01% 1993
2024
Q4 		$268K Buy
15,097
+3,959
+36% +$74.8K ﹤0.01% 2730
2024
Q3 		$212K Buy
+11,138
New +$205K ﹤0.01% 2899
2024
Q2 		– Sell
-29,844
Closed -$591K – 3245
2024
Q1 		$591K Buy
+29,844
New +$565K ﹤0.01% 1900
2023
Q4 		– Sell
-9,671
Closed -$213K – 3122
2023
Q3 		$213K Buy
+9,671
New +$207K ﹤0.01% 2451
2014
Q4 		– Sell
-16,433
Closed -$504K – 392
2014
Q3 		$504K Buy
16,433
+1,545
+10% +$54.7K 0.06% 215
2014
Q2 		$580K Buy
14,888
+494
+3% +$19.2K 0.06% 210
2014
Q1 		$577K Buy
+14,394
New +$572K 0.07% 202

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

Mariner's MAT Position: Q1 2026 in Review

Mariner sold out of Mattel (MAT) in Q1 2026, closing a stake of 15,838 shares — an estimated $315K sold.

Mariner first reported a position in MAT in Q1 2014 and held it in 11 quarters. The position peaked at $950K in Q2 2025. 425 funds tracked by Wall St. Rank hold MAT as of Q1 2026.

  • Mariner reported no remaining Mattel position as of Q1 2026 after selling out during the quarter.
  • Mariner sold 15,838 Mattel shares in Q1 2026, an estimated $315K.
  • Mariner first reported a position in Mattel in Q1 2014 and held it in 11 quarters.
  • Mariner's Mattel position peaked at $950K in Q2 2025.
  • 425 funds tracked by Wall St. Rank held Mattel as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.