13F Insight
DOSSIER · 13F Holders · Q1 2026High-convictionMulti-bagger

PROMIS NEUROSCIENCES INC

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

CUSIP 74346M505·21 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 8.5%
vs prior quarter
13F value held
$61M
57.0% inst. owned
of float
Holders
21
-53 QoQ
filers reporting
Activity
+100 / −56
+1,005 added · −764 reduced
this quarter
Concentration
26.95%
JANUS HENDERSON GROUP PLC #1
top holder share
AI Holders Summary · Q1 2026

21 institutions reported PROMIS NEUROSCIENCES INC in Q1 2026. JANUS HENDERSON GROUP PLC leads at 26.9% of the visible book. -53 net institutions QoQ — distribution reading.

Top holders

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

#HolderValueShares% port.Quarter
01
JANUS HENDERSON GROUP PLC
CIK 0001274173
$16M1.3M0.01%Q1 202602
Deep Track Capital, LP
CIK 0001856083
$11M836K0.17%Q1 202603
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$9M696K0.00%Q1 202604
Ally Bridge Group (NY) LLC
CIK 0001822947
$5M414K4.25%Q1 202605
Woodline Partners LP
CIK 0001784547
$5M395K0.02%Q1 202606
Yu Fan
CIK 0001668029
$4M330K4.32%Q1 202607
SPHERA FUNDS MANAGEMENT LTD.
CIK 0001496201
$4M326K0.66%Q1 202608
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
$2M139K0.00%Q1 202609
ADAR1 Capital Management, LLC
CIK 0001940272
$1M95K0.07%Q1 202610
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$989,59778K0.00%Q1 202611
Empery Asset Management, LP
CIK 0001469336
$766,48360K0.92%Q1 202612
Ikarian Capital, LLC
CIK 0001778253
$698,50055K0.06%Q1 202613
HEIGHTS CAPITAL MANAGEMENT, INC
CIK 0001081698
$643,38251K0.18%Q1 202614
BOOTHBAY FUND MANAGEMENT, LLC
CIK 0001549230
$203,74616K0.00%Q1 202615
Seven Fleet Capital Management LP
CIK 0002092021
$134,62011K0.04%Q1 202616
UBS Group AG
CIK 0001610520
$16,5101K0.00%Q1 202617
OSAIC HOLDINGS, INC.
CIK 0001677044
$4,5723600.00%Q1 202618
ROYAL BANK OF CANADA
CIK 0001000275
$4,0002680.00%Q1 202619
Steward Partners Investment Advisory, LLC
CIK 0001723397
$1,2701000.00%Q1 202620
Federation des caisses Desjardins du Quebec
CIK 0002022297
$127100.00%Q1 2026
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