DOSSIER · 13F Holders · Q3 2026

ROCKET LAB CORP

8 institutions still hold ROCKET LAB CORP as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 773121908·8 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$660M
visible holders
Holders
8
filers reporting
Concentration
57.12%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

8 institutions reported ROCKET LAB CORP in Q3 2026. IMC-Chicago, LLC leads at 57.1% 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
$377M5.4M0.08%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$204M2.0M0.29%Q2 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$64M922K0.04%Q3 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$8M86K0.00%Q2 2026
05
HRT FINANCIAL LP
CIK 0001475597
$4M63K0.01%Q4 2025
06
Step Capital Management Pte. Ltd.
CIK 0002091341
$2M20K0.44%Q2 2026
07
AlphaCore Capital LLC
CIK 0001713662
$3K350.00%Q3 2026
08
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025