DOSSIER · 13F Holders · Q1 2026

ATOSSA THERAPEUTICS INC

2 institutions still hold ATOSSA THERAPEUTICS INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 04962H954·2 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$282K
visible holders
Holders
2
filers reporting
Concentration
70.58%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q1 2026

2 institutions reported ATOSSA THERAPEUTICS INC in Q1 2026. GROUP ONE TRADING LLC leads at 70.6% 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
$199K38K0.00%Q1 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$83K16K0.00%Q1 2026