Holocene Advisors
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Holocene Advisors’s Mattel MAT Stock Holding History

Holocene 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 		$3.56M Buy
244,739
+119,591
+96% +$2.18M 0.01% 465
2025
Q4 		$2.48M Sell
125,148
-15,309
-11% -$296K 0.01% 474
2025
Q3 		$2.36M Buy
+140,457
New +$2.56M 0.01% 505
2024
Q4 		– Sell
-86,809
Closed -$1.65M – 827
2024
Q3 		$1.65M Sell
86,809
-230,990
-73% -$4.26M 0.01% 565
2024
Q2 		$5.17M Buy
317,799
+60,259
+23% +$1.09M 0.02% 317
2024
Q1 		$5.1M Buy
+257,540
New +$4.88M 0.02% 385
2023
Q3 		– Sell
-214,379
Closed -$4.19M – 809
2023
Q2 		$4.19M Buy
214,379
+130,134
+154% +$2.35M 0.02% 392
2023
Q1 		$1.55M Buy
84,245
+35,499
+73% +$660K 0.01% 509
2022
Q4 		$870K Buy
+48,746
New +$884K 0.01% 575
2022
Q1 		– Sell
-1,706,810
Closed -$36.8M – 959
2021
Q4 		$36.8M Buy
1,706,810
+267,181
+19% +$5.6M 0.19% 144
2021
Q3 		$26.7M Buy
1,439,629
+610,891
+74% +$12.7M 0.15% 176
2021
Q2 		$16.7M Sell
828,738
-297,043
-26% -$6.13M 0.09% 202
2021
Q1 		$22.4M Buy
+1,125,781
New +$21.8M 0.14% 165
2020
Q3 		– Sell
-92,680
Closed -$896K – 734
2020
Q2 		$896K Buy
92,680
+29,916
+48% +$272K 0.01% 445
2020
Q1 		$553K Buy
+62,764
New +$770K 0.01% 536
2019
Q4 		– Sell
-229,583
Closed -$2.62M – 733
2019
Q3 		$2.62M Buy
+229,583
New +$2.63M 0.03% 243
2018
Q3 		– Sell
-993,013
Closed -$16.3M – 772
2018
Q2 		$16.3M Buy
993,013
+973,988
+5,120% +$14.8M 0.35% 76
2018
Q1 		$250K Sell
19,025
-925,253
-98% -$14.4M 0.01% 446
2017
Q4 		$14.5M Buy
+944,278
New +$15M 0.37% 67

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

Holocene Advisors's MAT Position: Q1 2026 in Review

Holocene Advisors increased its Mattel (MAT) stake by 96% in Q1 2026, buying an estimated $2.18M and bringing the position to 244,739 shares worth $3.56M. The position accounts for 0.01% of the portfolio, ranked #465.

Holocene Advisors first reported a position in MAT in Q4 2017 and has held it in 19 quarters since. The position peaked at $36.8M in Q4 2021. 425 funds tracked by Wall St. Rank hold MAT as of Q1 2026.

  • Holocene Advisors held 244,739 shares of Mattel worth $3.56M as of Q1 2026.
  • Holocene Advisors bought 119,591 Mattel shares in Q1 2026, an estimated $2.18M.
  • Mattel made up 0.01% of Holocene Advisors's portfolio in Q1 2026, its #465 holding.
  • Holocene Advisors first reported a position in Mattel in Q4 2017 and has held it in 19 quarters since.
  • Holocene Advisors's Mattel position peaked at $36.8M in Q4 2021.
  • 425 funds tracked by Wall St. Rank held Mattel as of Q1 2026.

Based on Holocene Advisors's 13F filing for Q1 2026, filed 15 May 2026.