William Blair & Company
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William Blair & Company’s Seagate STX Stock Holding History

William Blair & Company’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 		$6.01M Buy
6,224
+2,002
+47% +$1.53M 0.02% 484
2026
Q1 		$1.65M Buy
4,222
+943
+29% +$360K ﹤0.01% 791
2025
Q4 		$903K Sell
3,279
-519
-14% -$135K ﹤0.01% 966
2025
Q3 		$897K Buy
3,798
+12
+0.3% +$2.05K ﹤0.01% 941
2025
Q2 		$546K Buy
3,786
+951
+34% +$98.5K ﹤0.01% 1063
2025
Q1 		$241K Buy
2,835
+157
+6% +$14.8K ﹤0.01% 1328
2024
Q4 		$231K Sell
2,678
-381
-12% -$38.4K ﹤0.01% 1389
2024
Q3 		$335K Buy
3,059
+16
+0.5% +$1.64K ﹤0.01% 1250
2024
Q2 		$314K Buy
+3,043
New +$284K ﹤0.01% 1252

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

William Blair & Company's STX Position: Q2 2026 in Review

William Blair & Company increased its Seagate (STX) stake by 47% in Q2 2026, buying an estimated $1.53M and bringing the position to 6,224 shares worth $6.01M. The position accounts for 0.02% of the portfolio, ranked #484.

William Blair & Company first reported a position in STX in Q2 2024 and has held it in 9 quarters since. 1,960 funds tracked by Wall St. Rank hold STX as of Q2 2026.

  • William Blair & Company held 6,224 shares of Seagate worth $6.01M as of Q2 2026.
  • William Blair & Company bought 2,002 Seagate shares in Q2 2026, an estimated $1.53M.
  • Seagate made up 0.02% of William Blair & Company's portfolio in Q2 2026, its #484 holding.
  • William Blair & Company first reported a position in Seagate in Q2 2024 and has held it in 9 quarters since.
  • 1,960 funds tracked by Wall St. Rank held Seagate as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.