DOSSIER · 13F Holders · Q2 2026

ASP ISOTOPES INC

5 institutions still hold ASP ISOTOPES INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 00218A905·5 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$9M
visible holders
Holders
5
filers reporting
Concentration
47.18%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q2 2026

5 institutions reported ASP ISOTOPES INC in Q2 2026. GROUP ONE TRADING LLC leads at 47.2% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
GROUP ONE TRADING LLC
CIK 0000932540
$4M703K0.01%Q2 2026
02
IMC-Chicago, LLC
CIK 0001452861· Market maker
$3M544K0.00%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$1M241K0.00%Q2 2026
04
OSAIC HOLDINGS, INC.
CIK 0001677044
$11K360.00%Q2 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025