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 		$74.1M Buy
76,800
+35,800
+87% +$27.3M 0.06% 270
2026
Q1 		$16.1M Buy
41,000
+32,000
+356% +$12.2M 0.02% 781
2025
Q4 		$2.48M Buy
+9,000
New +$2.34M ﹤0.01% 1478
2025
Q3 		– Sell
-196,600
Closed -$28.4M – 3380
2025
Q2 		$28.4M Buy
+196,600
New +$20.4M 0.03% 457

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.