13F Insight
DOSSIER · 13F Holders · Q1 2026

CITIGROUP INC CALL

16 institutions still hold CITIGROUP INC CALL as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 172967904·16 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$1.5B
visible holders
Holders
16
filers reporting
Concentration
31.29%
Optiver Holding B.V. #1
top holder share
AI Holders Summary · Q1 2026

16 institutions reported CITIGROUP INC CALL in Q1 2026. Optiver Holding B.V. leads at 31.3% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Optiver Holding B.V.
CIK 0001859606· Market maker
$482M4.2M0.17%Q1 202602
IMC-Chicago, LLC
CIK 0001452861· Market maker
$371M3.3M0.13%Q1 202603
CMT Capital Markets Trading GmbH
CIK 0001632813
$225M2.0M2.35%Q1 202604
SIMPLEX TRADING, LLC
CIK 0001488542
$181M1.6M0.12%Q1 202605
JPMORGAN CHASE & CO
CIK 0000019617
$123M1.1M0.01%Q1 202606
GROUP ONE TRADING LLC
CIK 0000932540
$101M890K0.19%Q1 202607
SG Americas Securities, LLC
CIK 0001313360
$22M614K0.02%Q1 202608
Assenagon Asset Management S.A.
CIK 0001546007· Quasi-passive
$17M120K0.02%Q2 202609
HRT FINANCIAL LP
CIK 0001475597
$6M55K0.02%Q4 202510
Capital Markets Trading UK LLP
CIK 0001719165
$5M47K0.07%Q1 202611
Maven Securities LTD
CIK 0001633046
$4M39K0.08%Q1 202612
Chancellor Financial Group WB LP
CIK 0002059742
$1M2460.95%Q1 202613
CenterStar Asset Management, LLC
CIK 0001722053
$204K2K0.03%Q1 202614
OSAIC HOLDINGS, INC.
CIK 0001677044
$11K1000.00%Q1 202615
Tennessee Valley Asset Management Partners
CIK 0001826790
$11K20.00%Q1 202616
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00—Q2 2025