SEC Form 3
FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person*
ABG V-SIV IX Ltd
(Last) (First) (Middle)
430 PARK AVENUE, 12TH FLOOR
(Street)
NEW YORK NY 10022
(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
02/03/2026 		3. Issuer Name and Ticker or Trading Symbol
ProMIS Neurosciences Inc. [ PMN ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Shares 943,090 I See Footnote(1)(2)(3)(4)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Warrants (5) (5) Common Shares 700,741 14.4 I See Footnote(2)(3)(4)(6)
1. Name and Address of Reporting Person*
ABG V-SIV IX Ltd
(Last) (First) (Middle)
430 PARK AVENUE, 12TH FLOOR
(Street)
NEW YORK NY 10022
(City) (State) (Zip)
1. Name and Address of Reporting Person*
Ally Bridge Group Global Life Science Capital Partners V, L.P.
(Last) (First) (Middle)
C/O MAPLES CORPORATE SERVICES LIMITED
P.O. BOX 309, UGLAND HOUSE,
(Street)
GRAND CAYMAN, E9
(City) (State) (Zip)
1. Name and Address of Reporting Person*
ABG Global Life Science Capital Partners V GP, L.P.
(Last) (First) (Middle)
C/O MAPLES CORPORATE SERVICES LIMITED
P.O. BOX 309, UGLAND HOUSE,
(Street)
GRAND CAYMAN, E9
(City) (State) (Zip)
1. Name and Address of Reporting Person*
ABG Global Life Science Capital Partners V GP Ltd
(Last) (First) (Middle)
C/O MAPLES CORPORATE SERVICES LIMITED
P.O. BOX 309, UGLAND HOUSE,
(Street)
GRAND CAYMAN, E9
(City) (State) (Zip)
1. Name and Address of Reporting Person*
ABG V-SIV X Ltd
(Last) (First) (Middle)
C/O MAPLES CORPORATE SERVICES LIMITED
P.O. BOX 309, UGLAND HOUSE,
(Street)
GRAND CAYMAN, E9
(City) (State) (Zip)
Explanation of Responses:
1. The Common Shares reported herein include: (i) 407,230 Common Shares held of record by Ally Bridge MedAlpha Master Fund L.P., (ii) 329,760 Common Shares held of record by ABG V-SIV IX Limited and (iii) 206,100 Common Shares held of record by ABG V-SIV X Limited.
2. Mr. Fan Yu is the controlling stockholder of ABG Management Ltd., which is the sole member of Ally Bridge Group (NY) LLC, which manages the investments of Ally Bridge MedAlpha Master Fund L.P. As such, each of the foregoing entities and Mr. Fan Yu may be deemed to share beneficial ownership of the securities held of record by Ally Bridge MedAlpha Master Fund L.P.
3. Mr. Fan Yu is also the indirect controlling stockholder of ABG Global Life Science Capital Partners V GP Limited, which is the general partner of ABG Global Life Science Capital Partners V GP, L.P., which is the general partner of Ally Bridge Group Global Life Science Capital Partners V, L.P., which is the controlling shareholder of ABG V-SIV IX Limited. As such, each of the foregoing entities and Mr. Fan Yu may be deemed to share beneficial ownership of the securities held of record by ABG V-SIV IX Limited.
4. Mr. Fan Yu is also the controlling stockholder of ABG V-SIV X Limited. As such, Mr. Fan Yu may be deemed to share beneficial ownership of the securities held of record by ABG V-SIV X Limited.
5. The warrants to purchase Common Shares (the "Warrants") are exercisable immediately and will expire upon the earlier of (i) within 60 days of the Milestone Event or (ii) February 3, 2031. For purposes of the foregoing, the "Milestone Event" means the public announcement via press release or the filing of a Current Report on Form 8-K by the Issuer of topline data from the cohorts treated with single ascending doses of PMN310.
6. The Warrants reported herein include: (i) Warrants to purchase 164,881 Common Shares held of record by Ally Bridge MedAlpha Master Fund L.P., (ii) Warrants to purchase 329,760 Common Shares held of record by ABG V-SIV IX Limited and (iii) Warrants to purchase 206,100 Common Shares held of record by ABG V-SIV X Limited.
Remarks:
Following the filing of this Form 3, the Reporting Persons are expected to file Forms 4 jointly with ABG Management Ltd., Ally Bridge MedAlpha Master Fund L.P., Ally Bridge Group (NY) LLC, Fan Yu and Slanix Alex.
ABG V-SIV IX Limited, By: Ally Bridge Group Global Life Science Capital Partners V, L.P., By: ABG Global Life Science Capital Partners V GP, L.P., By: ABG Global Life Science Capital Partners V GP Limited, By: /s/ Fan Yu 02/25/2026
Ally Bridge Group Global Life Science Capital Partners V, L.P., By: ABG Global Life Science Capital Partners V GP, L.P., its GP, By: ABG Global Life Science Capital Partners V GP Limited, its GP, By: /s/ Fan Yu, Director 02/25/2026
ABG Global Life Science Capital Partners V GP, L.P., By: ABG Global Life Science Capital Partners V GP Limited, its general partner, By: /s/ Fan Yu, Director 02/25/2026
ABG Global Life Science Capital Partners V GP Limited, By: /s/ Fan Yu, Director 02/25/2026
ABG V-SIV X Limited, By: /s/ Fan Yu, Director 02/25/2026
** Signature of Reporting Person Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

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