DOSSIER · 13F Holders · Q3 2026

NEBIUS GROUP N.V.

9 institutions still hold NEBIUS GROUP N.V. as of Q3 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP N97284908·9 13F holders·last filed Sep 30, 2026
Market cap
—
13F value held
$1.6B
visible holders
Holders
9
filers reporting
Concentration
66.81%
IMC-Chicago, LLC #1
top holder share
AI Holders Summary · Q3 2026

9 institutions reported NEBIUS GROUP N.V. in Q3 2026. IMC-Chicago, LLC leads at 66.8% 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
$1.1B4.6M0.22%Q3 2026
02
GROUP ONE TRADING LLC
CIK 0000932540
$356M1.5M0.49%Q3 2026
03
SIMPLEX TRADING, LLC
CIK 0001488542
$166M702K0.09%Q3 2026
04
JPMORGAN CHASE & CO
CIK 0000019617
$5M22K0.00%Q3 2026
05
OnyxPoint Global Management LP
CIK 0001961491
$3M11K0.54%Q3 2026
06
Altshuler Shaham Ltd
CIK 0001324290
$2M1280.03%Q3 2026
07
Marathon Trading Investment Management LLC
CIK 0001572748
$2M8K0.05%Q3 2026
08
OSAIC HOLDINGS, INC.
CIK 0001677044
$33K20.00%Q3 2026
09
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025