Quadrature Capital’s Seagate STX Stock Holding History

Quadrature Capital’s Portfolio STX Stock Details STX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$303M	Buy	313,545 +215,951	+221%	+$165M	2.59%	4
2026 Q1	$38.2M	Buy	+97,594	New	+$37.2M	0.45%	50
2025 Q4	–	Sell	-24,685	Closed	-$5.83M	–	1635
2025 Q3	$5.83M	Buy	+24,685	New	+$4.21M	0.07%	185
2023 Q1	–	Sell	-30,267	Closed	-$1.59M	–	1165
2022 Q4	$1.59M	Buy	+30,267	New	+$1.61M	0.05%	277
2020 Q1	–	Sell	-69,155	Closed	-$4.11M	–	696
2019 Q4	$4.11M	Sell	69,155 -195,991	-74%	-$11.3M	0.16%	146
2019 Q3	$14.3M	Buy	265,146 +259,257	+4,402%	+$12.7M	0.69%	40
2019 Q2	$277K	Buy	+5,889	New	+$274K	0.02%	373
2018 Q2	–	Sell	-15,978	Closed	-$935K	–	711
2018 Q1	$935K	Buy	+15,978	New	+$850K	0.07%	271
2017 Q1	–	Sell	-323,554	Closed	-$12.3M	–	853
2016 Q4	$12.3M	Buy	323,554 +242,786	+301%	+$9.06M	0.39%	64
2016 Q3	$3.11M	Buy	+80,768	New	+$2.62M	0.27%	93

Other funds holding STX

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

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

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

WCM Investment Management Laguna Beach, California $55.2B AUM 57.07% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Quadrature Capital's STX Position: Q2 2026 in Review

Quadrature Capital increased its Seagate (STX) stake by 221% in Q2 2026, buying an estimated $165M and bringing the position to 313,545 shares worth $303M. The position accounts for 2.59% of the portfolio, ranked #4.

Quadrature Capital first reported a position in STX in Q3 2016 and has held it in 10 quarters since. 1,950 funds tracked by Wall St. Rank hold STX as of Q2 2026.

Quadrature Capital held 313,545 shares of Seagate worth $303M as of Q2 2026.
Quadrature Capital bought 215,951 Seagate shares in Q2 2026, an estimated $165M.
Seagate made up 2.59% of Quadrature Capital's portfolio in Q2 2026, its #4 holding.
Quadrature Capital first reported a position in Seagate in Q3 2016 and has held it in 10 quarters since.
1,950 funds tracked by Wall St. Rank held Seagate as of Q2 2026.

Based on Quadrature Capital's 13F filing for Q2 2026, filed 7 Aug 2026.