Marshall Wace
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Marshall Wace’s Seagate STX Stock Holding History

Marshall Wace’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 		$100M Buy
103,612
+89,187
+618% +$68M 0.08% 200
2026
Q1 		$5.65M Sell
14,425
-7,102
-33% -$2.71M 0.01% 1241
2025
Q4 		$5.93M Sell
21,527
-71,844
-77% -$18.6M 0.01% 1075
2025
Q3 		$22M Buy
+93,371
New +$15.9M 0.02% 612
2025
Q2 		– Sell
-83,461
Closed -$8.64M – 3155
2025
Q1 		$7.09M Sell
83,461
-812,626
-91% -$76.8M 0.01% 907
2024
Q4 		$77.3M Buy
+896,087
New +$90.2M 0.09% 203
2024
Q2 		– Sell
-22,226
Closed -$2.07M – 2943
2024
Q1 		$2.07M Buy
22,226
+635
+3% +$55.8K ﹤0.01% 1352
2023
Q4 		$1.84M Buy
+21,591
New +$1.61M ﹤0.01% 1256
2023
Q3 		– Sell
-3,263
Closed -$202K – 2664
2023
Q2 		$202K Sell
3,263
-37,086
-92% -$2.26M ﹤0.01% 2240
2023
Q1 		$2.67M Buy
+40,349
New +$2.57M 0.01% 1295
2021
Q3 		– Sell
-2,341
Closed -$206K – 3415
2021
Q2 		$206K Sell
2,341
-5,064
-68% -$456K ﹤0.01% 2436
2021
Q1 		$568K Buy
+7,405
New +$515K ﹤0.01% 1895
2020
Q1 		– Sell
-47
Closed -$3K – 2044
2019
Q4 		$3K Buy
+47
New +$2.7K ﹤0.01% 1626
2017
Q1 		– Sell
-93,557
Closed -$3.57M – 710
2016
Q4 		$3.57M Buy
+93,557
New +$3.49M 0.02% 544
2015
Q4 		– Sell
-13,096
Closed -$587K – 1117
2015
Q3 		$587K Sell
13,096
-13,079
-50% -$633K 0.01% 714
2015
Q2 		$1.24M Sell
26,175
-54,887
-68% -$3.03M 0.02% 560
2015
Q1 		$4.22M Buy
81,062
+8,338
+11% +$496K 0.06% 350
2014
Q4 		$4.84M Sell
72,724
-440,197
-86% -$27.3M 0.06% 315
2014
Q3 		$29.4M Buy
512,921
+398,455
+348% +$23.6M 0.42% 56
2014
Q2 		$6.5M Sell
114,466
-106,984
-48% -$5.76M 0.1% 234
2014
Q1 		$12.4M Buy
+221,450
New +$11.9M 0.23% 124

Other funds holding STX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
WCM Investment Management
WCM Investment Management Laguna Beach, California $55.2B AUM 57.07% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Marshall Wace's STX Position: Q2 2026 in Review

Marshall Wace increased its Seagate (STX) stake by 618% in Q2 2026, buying an estimated $68M and bringing the position to 103,612 shares worth $100M. The position accounts for 0.08% of the portfolio, ranked #200.

Marshall Wace first reported a position in STX in Q1 2014 and has held it in 21 quarters since. 1,958 funds tracked by Wall St. Rank hold STX as of Q2 2026.

  • Marshall Wace held 103,612 shares of Seagate worth $100M as of Q2 2026.
  • Marshall Wace bought 89,187 Seagate shares in Q2 2026, an estimated $68M.
  • Seagate made up 0.08% of Marshall Wace's portfolio in Q2 2026, its #200 holding.
  • Marshall Wace first reported a position in Seagate in Q1 2014 and has held it in 21 quarters since.
  • 1,958 funds tracked by Wall St. Rank held Seagate as of Q2 2026.

Based on Marshall Wace's 13F filing for Q2 2026, filed 13 Aug 2026.