WILLIAM JOHN SEMPOLINSKI

Position in LRCX — Lam Research Corp

CIK 2149024 EASTON, MA

Position in LRCX

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$641,328

New position

Shares Held

1,480

first reported quarter

Ownership

0.000%

of shares outstanding

% of Portfolio

0.41%

of 13F equity value

Holder Rank

#2,121

of 3,103 holders

Holding Since

Jun 2026

1 quarter on record

Voting authority Sole 0% Shared 0% None 100%

Technology · as of Jun 30, 2026

WILLIAM JOHN SEMPOLINSKI holds $2,898,294 across 3 Semiconductor Equipment & Materials names. LRCX ranks #3 (22.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ASML	Asml Holding NV	710	$1,412,502
2	AMAT	Applied Materials Inc /De	1,168	$844,464
3	LRCX	Lam Research Corp This page	1,480	$641,328

1 filing row on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$641,328	1,480	—	Shares	Sole	2026-08-14
No filing history on record for this holder in this stock.