DOSSIER · 13F Holders · Q2 2026

AMERICAN SUPERCONDUCTOR CORP

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

CUSIP 030111907·5 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$14M
visible holders
Holders
5
filers reporting
Concentration
68.60%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q2 2026

5 institutions reported AMERICAN SUPERCONDUCTOR CORP in Q2 2026. IMC-Chicago, LLC leads at 68.6% 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
$9M227K0.00%Q2 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$3M64K0.00%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$2M40K0.00%Q2 2026
04
OSAIC HOLDINGS, INC.
CIK 0001677044
$1K10.00%Q2 2026
05
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025