John Overdeck’s Mattel MAT Stock Holding History

John Overdeck’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	$698K	Buy	+50,300	New	+$736K	﹤0.01%	3901
2022 Q1	–	Sell	-13,200	Closed	-$285K	–	3646
2021 Q4	$285K	Sell	13,200 -4,200	-24%	-$88.1K	﹤0.01%	3681
2021 Q3	$323K	Buy	+17,400	New	+$361K	﹤0.01%	3606
2021 Q2	–	Sell	-19,800	Closed	-$394K	–	4364
2021 Q1	$394K	Sell	19,800 -30,000	-60%	-$580K	﹤0.01%	3132
2020 Q4	$869K	Buy	49,800 +36,100	+264%	+$532K	﹤0.01%	2112
2020 Q3	$160K	Buy	13,700 +1,000	+8%	+$11.1K	﹤0.01%	2874
2020 Q2	$123K	Sell	12,700 -800	-6%	-$7.26K	﹤0.01%	2760
2020 Q1	$119K	Sell	13,500 -27,300	-67%	-$335K	﹤0.01%	2808
2019 Q4	$553K	Sell	40,800 -21,000	-34%	-$249K	﹤0.01%	2715
2019 Q3	$704K	Buy	61,800 +45,900	+289%	+$525K	﹤0.01%	2277
2019 Q2	$178K	Buy	+15,900	New	+$187K	﹤0.01%	3117
2018 Q3	–	Sell	-11,500	Closed	-$189K	–	3426
2018 Q2	$189K	Sell	11,500 -4,100	-26%	-$62.2K	﹤0.01%	3141
2018 Q1	$205K	Buy	+15,600	New	+$243K	﹤0.01%	2973
2017 Q1	–	Sell	-65,900	Closed	-$1.82M	–	3146
2016 Q4	$1.82M	Buy	+65,900	New	+$2M	0.01%	1562
2016 Q3	–	Sell	-99,600	Closed	-$3.12M	–	3260
2016 Q2	$3.12M	Buy	99,600 +77,600	+353%	+$2.46M	0.01%	1011
2016 Q1	$740K	Sell	22,000 -4,000	-15%	-$122K	﹤0.01%	1796
2015 Q4	$706K	Sell	26,000 -8,000	-24%	-$197K	﹤0.01%	1735
2015 Q3	$716K	Sell	34,000 -34,000	-50%	-$796K	﹤0.01%	1370
2015 Q2	$1.75M	Buy	+68,000	New	+$1.79M	0.01%	1290

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

John Overdeck's MAT Position: Q2 2026 in Review

John Overdeck opened a new position in Mattel (MAT) in Q2 2026: 71,475 shares worth $992K. The stake represents ﹤0.01% of the portfolio and ranks #3620 among its holdings. This is a return to the name: John Overdeck previously reported a position in MAT as recently as Q4 2025.

John Overdeck first reported a position in MAT in Q2 2013 and has held it in 26 quarters since. The position peaked at $68.2M in Q1 2015. 400 funds tracked by Wall St. Rank hold MAT as of Q2 2026.

John Overdeck held 71,475 shares of Mattel worth $992K as of Q2 2026.
Mattel was a new John Overdeck position in Q2 2026.
Mattel made up ﹤0.01% of John Overdeck's portfolio in Q2 2026, its #3620 holding.
John Overdeck first reported a position in Mattel in Q2 2013 and has held it in 26 quarters since.
John Overdeck's Mattel position peaked at $68.2M in Q1 2015.
400 funds tracked by Wall St. Rank held Mattel as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.