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William John Sempolinski’s Rocket Lab Corp RKLB Stock Holding History

William John Sempolinski’s Portfolio RKLB Stock Details RKLB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$2.62M Buy
+25,800
New +$2.57M 1.06% 22

Other funds holding RKLB

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 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
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

William John Sempolinski's RKLB Position: Q2 2026 in Review

William John Sempolinski opened a new position in Rocket Lab Corp (RKLB) in Q2 2026: 25,800 shares worth $2.62M. The stake represents 1.06% of the portfolio and ranks #22 among its holdings.

1,067 funds tracked by Wall St. Rank hold RKLB as of Q2 2026.

  • William John Sempolinski held 25,800 shares of Rocket Lab Corp worth $2.62M as of Q2 2026.
  • Rocket Lab Corp was a new William John Sempolinski position in Q2 2026.
  • Rocket Lab Corp made up 1.06% of William John Sempolinski's portfolio in Q2 2026, its #22 holding.
  • 1,067 funds tracked by Wall St. Rank held Rocket Lab Corp as of Q2 2026.

Based on William John Sempolinski's 13F filing for Q2 2026, filed 14 Aug 2026.