Primecap Management
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Primecap Management’s Seagate STX Stock Holding History

Primecap Management’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 		$182M Sell
188,777
-41,555
-18% -$31.7M 0.11% 124
2026
Q1 		$90.2M Sell
230,332
-153,950
-40% -$58.7M 0.07% 160
2025
Q4 		$106M Sell
384,282
-270,275
-41% -$70.1M 0.08% 141
2025
Q3 		$155M Sell
654,557
-328,650
-33% -$56.1M 0.12% 124
2025
Q2 		$142M Buy
983,207
+152,752
+18% +$15.8M 0.11% 129
2025
Q1 		$70.5M Buy
830,455
+68,300
+9% +$6.45M 0.06% 157
2024
Q4 		$65.8M Buy
762,155
+160,735
+27% +$16.2M 0.05% 164
2024
Q3 		$65.9M Buy
601,420
+19,125
+3% +$1.96M 0.05% 167
2024
Q2 		$60.1M Buy
582,295
+35,545
+7% +$3.32M 0.04% 173
2024
Q1 		$50.9M Buy
546,750
+153,100
+39% +$13.5M 0.04% 188
2023
Q4 		$33.6M Buy
393,650
+112,950
+40% +$8.43M 0.03% 209
2023
Q3 		$18.5M Buy
280,700
+6,000
+2% +$386K 0.02% 233
2023
Q2 		$17M Sell
274,700
-5,000
-2% -$305K 0.01% 236
2023
Q1 		$18.5M Buy
279,700
+55,000
+24% +$3.5M 0.02% 229
2022
Q4 		$11.8M Buy
+224,700
New +$11.9M 0.01% 242

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

Primecap Management's STX Position: Q2 2026 in Review

Primecap Management reduced its Seagate (STX) stake by 18% in Q2 2026, selling an estimated $31.7M and leaving 188,777 shares worth $182M. The position accounts for 0.11% of the portfolio, ranked #124.

Primecap Management first reported a position in STX in Q4 2022 and has held it in 15 quarters since. 1,946 funds tracked by Wall St. Rank hold STX as of Q2 2026.

  • Primecap Management held 188,777 shares of Seagate worth $182M as of Q2 2026.
  • Primecap Management sold 41,555 Seagate shares in Q2 2026, an estimated $31.7M.
  • Seagate made up 0.11% of Primecap Management's portfolio in Q2 2026, its #124 holding.
  • Primecap Management first reported a position in Seagate in Q4 2022 and has held it in 15 quarters since.
  • 1,946 funds tracked by Wall St. Rank held Seagate as of Q2 2026.

Based on Primecap Management's 13F filing for Q2 2026, filed 14 Aug 2026.