UBS O'Connor’s Mattel MAT Stock Holding History

UBS O'Connor’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
2022 Q1	–	Sell	-106,300	Closed	-$4K	–	1020
2021 Q4	$4K	Buy	106,300 +15,000	+16%	+$315K	﹤0.01%	933
2021 Q3	$11K	Hold	91,300	–	–	﹤0.01%	909
2021 Q2	$16K	Hold	91,300	–	–	﹤0.01%	874
2021 Q1	$30K	Sell	91,300 -518,700	-85%	-$10M	﹤0.01%	801
2020 Q4	$84K	Hold	610,000	–	–	﹤0.01%	566
2020 Q3	$502K	Hold	610,000	–	–	0.01%	262
2020 Q2	$1.14M	Sell	610,000 -250,000	-29%	-$2.27M	0.03%	267
2020 Q1	$1.72M	Sell	860,000 -62,500	-7%	-$766K	0.04%	191
2019 Q4	$256K	Sell	922,500 -117,500	-11%	-$1.39M	0.01%	273
2019 Q3	$784K	Buy	1,040,000 +22,500	+2%	+$257K	0.02%	220
2019 Q2	$1.29M	Buy	1,017,500 +37,500	+4%	+$440K	0.03%	163
2019 Q1	$837K	Buy	980,000 +63,000	+7%	+$842K	0.02%	186
2018 Q4	$2.26M	Buy	917,000 +350,000	+62%	+$4.64M	0.08%	125
2018 Q3	$483K	Buy	567,000 +262,500	+86%	+$4.2M	0.01%	243
2018 Q2	$242K	Buy	+304,500	New	+$4.62M	﹤0.01%	248

Other funds holding MAT

EIG

EdgePoint Investment Group Toronto, Ontario, Canada $13.2B AUM 32.43% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 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

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

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

SAM

Southeastern Asset Management Memphis, Tennessee $1.92B AUM 6.41% 1-Year Est. Return

Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

UBS O'Connor's MAT Position: Q4 2025 in Review

UBS O'Connor increased its Mattel (MAT) stake by 3.2% in Q4 2025, buying an estimated $591K and bringing the position to 973,829 shares worth $19.3M. The position accounts for 0.51% of the portfolio, ranked #19.

UBS O'Connor first reported a position in MAT in Q4 2014 and has held it in 27 quarters since. The position peaked at $24.8M in Q1 2015. 441 funds tracked by Wall St. Rank hold MAT as of Q4 2025.

UBS O'Connor held 973,829 shares of Mattel worth $19.3M as of Q4 2025.
UBS O'Connor bought 30,600 Mattel shares in Q4 2025, an estimated $591K.
Mattel made up 0.51% of UBS O'Connor's portfolio in Q4 2025, its #19 holding.
UBS O'Connor first reported a position in Mattel in Q4 2014 and has held it in 27 quarters since.
UBS O'Connor's Mattel position peaked at $24.8M in Q1 2015.
441 funds tracked by Wall St. Rank held Mattel as of Q4 2025.

Based on UBS O'Connor's 13F filing for Q4 2025, filed 13 Feb 2026.