DOSSIER · 13F Holders · Q1 2026

YORK SPACE SYSTEMS INC

3 institutions still hold YORK SPACE SYSTEMS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 987084950·3 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$403K
visible holders
Holders
3
filers reporting
Concentration
54.95%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q1 2026

3 institutions reported YORK SPACE SYSTEMS INC in Q1 2026. IMC-Chicago, LLC leads at 54.9% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
IMC-Chicago, LLC
CIK 0001452861· Market maker
$222K10K0.00%Q1 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$164K7K0.00%Q1 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$18K8000.00%Q1 2026