William John Sempolinski
- SEC CIK
- 0002149024
- Latest filing
- Aug 14, 2026
ARM holding history
Arm Holdings PLC in every 13F filed by William John Sempolinski, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.
ARM overviewAll 13F holders of ARMFull Q2 2026 holdings
- Shares (Q2 2026)
- 1,802
- Value
- $638.9K
- % of portfolio
- 0.3%
- Quarters held
- 2
- Since Q1 2026