13F Insight
DOSSIER · 13F Holders · Q1 2026
NBP

I MAB

51 institutions still hold I MAB as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 44975P103·51 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$64M
visible holders
Holders
51
filers reporting
Concentration
23.05%
JANUS HENDERSON GROUP PLC #1
top holder share
AI Holders Summary · Q1 2026

51 institutions reported NBP in Q1 2026. JANUS HENDERSON GROUP PLC leads at 23.0% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
JANUS HENDERSON GROUP PLC
CIK 0001274173
$15M6.0M0.01%Q1 202602
HHLR ADVISORS, LTD.
CIK 0001762304
$12M6.0M1.40%Q2 202603
MORGAN STANLEY
CIK 0000895421
$7M3.7M0.00%Q2 202604
AIHC Capital Management Ltd
CIK 0002103725
$6M2.9M5.38%Q2 202605
Siren, L.L.C.
CIK 0002005245
$4M2.0M0.08%Q2 202606
Point72 Asset Management, L.P.
CIK 0001603466
$3M1.4M0.00%Q1 202607
MARSHALL WACE, LLP
CIK 0001318757
$2M1.2M0.00%Q2 202608
Candriam S.C.A.
CIK 0001537014
$2M1.1M0.01%Q2 202609
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
$2M1.0M0.00%Q2 202610
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$2M851K0.00%Q2 202611
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$1M758K0.00%Q2 202612
BlackRock, Inc.
CIK 0002012383
$1M686K0.00%Q2 202613
CITADEL ADVISORS LLC
CIK 0001423053
$1M658K0.00%Q2 202614
E Fund Management Co., Ltd.
CIK 0001842296
$1M589K0.03%Q2 202615
Exome Asset Management LLC
CIK 0002011932
$1M577K0.69%Q2 202616
STATE STREET CORP
CIK 0000093751
$703K360K0.00%Q2 202617
Woodline Partners LP
CIK 0001784547
$683K350K0.00%Q2 202618
Fiera Capital Corp
CIK 0001505817
$616K316K0.00%Q2 202619
UBS Group AG
CIK 0001610520
$588K302K0.00%Q2 202620
BARCLAYS PLC
CIK 0000312069
$544K279K0.00%Q2 2026
Page 1 of 3
31 more holders available. Log in →
Insiders at I MAB
Xu Cong Claire →Lin Liwei Lorraine →Hagler Mark Arnold →Fu Wei →Cao Sean Wuxiong →Dennis Phillip Andrew →Miller Paul F →Place Janet K →