DOSSIER · 13F Holders · Q1 2026
NBP

I MAB

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

CUSIP 44975P103·48 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$70M
visible holders
Holders
48
filers reporting
Concentration
21.20%
JANUS HENDERSON GROUP PLC #1
top holder share
AI Holders Summary · Q1 2026

48 institutions reported NBP in Q1 2026. JANUS HENDERSON GROUP PLC leads at 21.2% 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 2026
02
HHLR ADVISORS, LTD.
CIK 0001762304
$15M6.0M0.88%Q1 2026
03
MORGAN STANLEY
CIK 0000895421
$9M3.8M0.00%Q1 2026
04
Siren, L.L.C.
CIK 0002005245
$7M3.0M0.20%Q1 2026
05
AIHC Capital Management Ltd
CIK 0002103725
$6M2.3M4.65%Q1 2026
06
Point72 Asset Management, L.P.
CIK 0001603466
$3M1.4M0.00%Q1 2026
07
Candriam S.C.A.
CIK 0001537014
$3M1.1M0.01%Q1 2026
08
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
$2M1.0M0.00%Q1 2026
09
Woodline Partners LP
CIK 0001784547
$2M700K0.01%Q1 2026
10
BlackRock, Inc.
CIK 0002012383
$2M627K0.00%Q1 2026
11
Exome Asset Management LLC
CIK 0002011932
$1M577K0.73%Q1 2026
12
STATE STREET CORP
CIK 0000093751
$910K370K0.00%Q1 2026
13
Fiera Capital Corp
CIK 0001505817
$777K316K0.00%Q1 2026
14
BARCLAYS PLC
CIK 0000312069
$736K299K0.00%Q1 2026
15
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$670K272K0.00%Q1 2026
16
Taikang Asset Management (Hong Kong) Co Ltd
CIK 0001755911
$420K171K0.04%Q1 2026
17
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$360K146K0.00%Q1 2026
18
GOLDMAN SACHS GROUP INC
CIK 0000886982
$277K112K0.00%Q1 2026
19
XTX Topco Ltd
CIK 0001828301
$250K102K0.00%Q1 2026
20
AXQ CAPITAL, LP
CIK 0001916908
$205K83K0.03%Q1 2026
Page 1 of 3
28 more holders available. Log in →
Insiders at I MAB
Lin Liwei LorraineHagler Mark ArnoldXu Cong ClaireFu WeiCao Sean WuxiongDennis Phillip AndrewMiller Paul FPlace Janet K