DOSSIER · 13F Holders · Q3 2026

TRANSOCEAN LTD

6 institutions still hold TRANSOCEAN LTD as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP H8817H900·6 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$45M
visible holders
Holders
6
filers reporting
Concentration
53.89%
GROUP ONE TRADING LLC #1
top holder share
AI Holders Summary · Q3 2026

6 institutions reported TRANSOCEAN LTD in Q3 2026. GROUP ONE TRADING LLC leads at 53.9% 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
$24M4.6M0.03%Q3 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$11M2.1M0.01%Q3 2026
03
IMC-Chicago, LLC
CIK 0001452861· Market maker
$7M1.4M0.00%Q3 2026
04
CIBC Bancorp USA Inc.
CIK 0001711924
$2M400K0.00%Q3 2026
05
Ancora Advisors LLC
CIK 0001446114
$6K7000.00%Q2 2026
06
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025