DOSSIER · 13F Holders · Q3 2026

SEAGATE TECHNOLOGY HLDNGS PL

9 institutions still hold SEAGATE TECHNOLOGY HLDNGS PL as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP G7997R903·9 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$986M
visible holders
Holders
9
filers reporting
Concentration
79.99%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

9 institutions reported SEAGATE TECHNOLOGY HLDNGS PL in Q3 2026. IMC-Chicago, LLC leads at 80.0% 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
$789M855K0.16%Q3 2026
02
SIMPLEX TRADING, LLC
CIK 0001488542
$93M101K0.05%Q3 2026
03
GROUP ONE TRADING LLC
CIK 0000932540
$70M76K0.10%Q3 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$24M27K0.00%Q3 2026
05
CMT Capital Markets Trading GmbH
CIK 0001632813
$8M21K0.09%Q1 2026
06
Perigon Wealth Management, LLC
CIK 0001575239
$461K5000.01%Q3 2026
07
AlphaCore Capital LLC
CIK 0001713662
$331K350.01%Q3 2026
08
OSAIC HOLDINGS, INC.
CIK 0001677044
$73K10.00%Q3 2026
09
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025