William John Sempolinski

SEC CIK: 0002149024
Latest filing: Aug 14, 2026

SEC filings (opens in a new tab)

GRAL holding history

GRAIL, Inc. 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.

GRAL overview All 13F holders of GRAL Full Q2 2026 holdings

Shares (Q2 2026): 7,150
Value: $488.1K
% of portfolio: 0.2%
Quarters held: 2; Since Q4 2025

Holdings of GRAL by William John Sempolinski, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	7,150	$488.1K	0.2%	+7,150	New	Holders
Q1 2026	0	$0	0.0%	−17,975−100.0%	Sold out	Holders
Q4 2025	17,975	$1.54M	0.8%	–	No prior filing	Holders