Skip to main content

WILLIAM JOHN SEMPOLINSKI

Position in IRM — Iron Mountain Inc

CIK 2149024 EASTON, MA

Position in IRM

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$239,989
New position
Shares Held
1,900
first reported quarter
Ownership
0.001%
of shares outstanding
% of Portfolio
0.15%
of 13F equity value
Holder Rank
#864
of 1,152 holders
Holding Since
Jun 2026
1 quarter on record
Voting authority Sole 0% Shared 0% None 100%

Position in REIT - Specialty

Real Estate · as of Jun 30, 2026

WILLIAM JOHN SEMPOLINSKI holds $239,989 across 1 REIT - Specialty name. IRM ranks #1 (100.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 IRM
Iron Mountain Inc
This page
1,900 $239,989

All Filings in IRM

Export CSV
1 filing row on record
Report Date Value (USD) Shares
2026-06-30 $239,989 1,900