William John Sempolinski »

Rocket Lab Corp shares owned by William John Sempolinski

Quarter-by-quarter ownership of Rocket Lab Corp (RKLB) shares owned by William John Sempolinski from 13F filings

Historical chart of William John Sempolinski investment in Rocket Lab Corp

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All positions including Rocket Lab Corp held by William John Sempolinski consolidated in one spreadsheet with up to 7 years of data

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Quarterly reported holdings in Rocket Lab Corp by William John Sempolinski

Quarter filed Position value Share count Share price at filing
2026-03-31 $1.7M 27k 64.22
2025-12-31 $2.1M 30k 69.76

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View all positions for William John Sempolinski

Top funds holding Rocket Lab Corp

BlackRock
Vanguard Portfolio Management
Vanguard Capital Management
UBS Group
Invesco
Jane Street
Susquehanna International
State Street Corporation
Jpmorgan Chase & Co
Citadel Advisors
Geode Capital Management
Baillie Gifford & Co
Goldman Sachs Group
Capital World Investors
Norges Bank Investment Management

View all funds holding Rocket Lab Corp