PMN · ProMIS Neurosciences Inc. · Holdings

$13.56 +0.16 (+1.19%) At close · Sep 11

Market Cap

$121.60M

8.97M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 27

Total Value: $84,256,364

Total Shares: 6,402,460

Institutional Ownership Trend

17 quarters

Holder Concentration

Across 27 13F filers · Δ vs Mar 31, 2026

Top Holder

20.2%

−0.9 pts

Top 5

62.5%

+0.7 pts

Top 10

87.9%

−2.3 pts

HHI

1,025

Broadly held−36

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +2

Institutional value: +8.0%

Shares held: +4.2%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Small Ally Bridge Group (NY) LLC	+206,100	620,319
Small Ikarian Capital, LLC	+150,000	205,000
Large Woodline Partners LP	+46,616	441,911
Mid BOOTHBAY FUND MANAGEMENT, LLC	+46,035	62,078
Large ADAGE CAPITAL PARTNERS GP, L.L.C.	+25,000	164,275

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Small GREAT POINT PARTNERS LLC	−285,252	86,150
Mega MILLENNIUM MANAGEMENT LLC	−21,876	56,045
Mid ADAR1 Capital Management, LLC	−2,500	92,850
Mega UBS Group AG	−609	691
Mega ROYAL BANK OF CANADA	−50	218

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega Jupiter Topco LLC	1,292,757	$17,012,682
Mega AMERIPRISE FINANCIAL INC	185,700	$2,443,812
Mega BANK OF MONTREAL /CAN/	11,371	$149,642
Mega MORGAN STANLEY	7,559	$99,476
Small Caitong International Asset Management Co., Ltd	3	$39

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mega JANUS HENDERSON GROUP PLC	1,292,757	$16,418,013
Micro Empery Asset Management, LP	60,353	$766,483
Small HEIGHTS CAPITAL MANAGEMENT, INC	50,660	$643,382

Filter: New 5 Increased 6 Reduced 6 Sold out 3 Unchanged 10

Showing 27 of 27

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Jupiter Topco LLC

$17,012,682

20.19%

1,292,757

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JANUS HENDERSON INVESTORS US LLC	1,292,757	$17,012,682	100.0%	Defined

Deep Track Capital, LP

$10,997,219

13.05%

835,655

WELLINGTON MANAGEMENT GROUP LLP

$9,164,334

10.88%

696,378

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Wellington Management Company LLP	696,378	$9,164,334	100.0%	Defined

Ally Bridge Group (NY) LLC

$8,163,398

9.69%

620,319

Trails Edge Capital Partners, LP

$7,331,475

8.70%

557,103

Woodline Partners LP

$5,815,548

6.90%

441,911

Yu Fan

$4,339,641

5.15%

329,760

SPHERA FUNDS MANAGEMENT LTD.

$4,284,777

5.09%

325,591

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Sphera Global Healthcare Management LP joint	325,591	$4,284,777	100.0%	Defined

Squadron Capital Management LLC

$4,276,697

5.08%

324,977

Ikarian Capital, LLC

$2,697,800

3.20%

205,000

AMERIPRISE FINANCIAL INC

$2,443,812

2.90%

185,700

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Columbia Management Investment Advisers, LLC	185,700	$2,443,812	100.0%	Defined

ADAGE CAPITAL PARTNERS GP, L.L.C.

$2,161,859

2.57%

164,275

683 Capital Management, LLC

$1,250,200

1.48%

95,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
683 Capital Partners, LP	95,000	$1,250,200	100.0%	Defined

ADAR1 Capital Management, LLC

$1,221,906

1.45%

92,850

GREAT POINT PARTNERS LLC

$1,133,734

1.35%

86,150

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JAY JEFFREY R joint	86,150	$1,133,734	100.0%	Defined

BOOTHBAY FUND MANAGEMENT, LLC

$816,946

0.97%

62,078

MILLENNIUM MANAGEMENT LLC

$737,552

0.88%

56,045

BANK OF MONTREAL /CAN/

$149,642

0.18%

11,371

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BMO NESBITT BURNS INC.	11,371	$149,642	100.0%	Defined

Seven Fleet Capital Management LP

$139,496

0.17%

10,600

MORGAN STANLEY

$99,476

0.12%

7,559

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY SMITH BARNEY LLC	7,559	$99,476	100.0%	Defined

UBS Group AG

$9,093

0.01%

691

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	1	$13	0.1%	Defined
UBS Securities LLC	690	$9,080	99.9%	Defined

OSAIC HOLDINGS, INC.

$4,737

0.01%

360

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	360	$4,737	100.0%	Defined

ROYAL BANK OF CANADA

$2,868

0.00%

218

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Dominion Securities Inc.	218	$2,868	100.0%	Defined

Steward Partners Investment Advisory, LLC

$1,237

0.00%

Federation des caisses Desjardins du Quebec

$131

0.00%

TD Waterhouse Canada Inc.

$65

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TORONTO DOMINION BANK	5	$65	100.0%	Defined

Caitong International Asset Management Co., Ltd

$39

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JANUS HENDERSON INVESTORS US LLC	1,292,757	$16,418,013	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
CVI Investments, Inc.	50,660	$643,382	100.0%	Other

Key facts CIK 1374339 CUSIP 74346M505 13F (30d) 21 filings 21 filers Visit website Investor relations