13F Insight
DOSSIER · 13F Holders · Q3 2026

RIVIAN AUTOMOTIVE INC

10 institutions still hold RIVIAN AUTOMOTIVE INC as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 76954A903·10 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$145M
visible holders
Holders
10
filers reporting
Concentration
42.68%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

10 institutions reported RIVIAN AUTOMOTIVE INC in Q3 2026. IMC-Chicago, LLC leads at 42.7% 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
$62M4.2M0.01%Q3 202602
SIMPLEX TRADING, LLC
CIK 0001488542
$29M2.0M0.02%Q3 202603
GROUP ONE TRADING LLC
CIK 0000932540
$28M1.9M0.04%Q3 202604
CMT Capital Markets Trading GmbH
CIK 0001632813
$19M1.3M0.20%Q1 202605
Capital Markets Trading UK LLP
CIK 0001719165
$5M304K0.06%Q1 202606
JPMORGAN CHASE & CO
CIK 0000019617
$2M128K0.00%Q3 202607
SG Americas Securities, LLC
CIK 0001313360
$244K166K0.00%Q1 202608
Marathon Trading Investment Management LLC
CIK 0001572748
$221K15K0.01%Q3 202609
OSAIC HOLDINGS, INC.
CIK 0001677044
$2K50.00%Q3 202610
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025