ACST Acasti Pharma Inc

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES                                                                                   
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940                       

1. Name and Address of Reporting Person * Lemieux Pierre	2. Issuer Name and Ticker or Trading Symbol Acasti Pharma Inc. [ ACST ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                    _____ 10% Owner __X__ Officer (give title below)    _____ Other (specify below) COO, Canada & CSO
(Last)          (First)          (Middle) C/O ACASTI PHARMA INC., 3009 BOUL. DE LA CONCORDE, SUITE 102	3. Date of Earliest Transaction (MM/DD/YYYY) 11/12/2021
(Street) LAVAL, A6 H7E 2B5 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Options (Right to Buy)	$1.63 (1)	11/12/2021		A		287900		(2)	11/12/2031	Class A Common Shares	287900	$0	287900	D

Explanation of Responses:
(1)	Based on conversion of exercise price of C$2.05 into U.S. dollars based on an exchange rate of C$1.00 = US$0.7959 on the date of grant.
(2)	Stock options granted on 11/12/2021 under Acasti Pharma Inc.'s Stock Option Plan and become exercisable evenly and on a quarterly basis over 36 months.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Lemieux Pierre C/O ACASTI PHARMA INC. 3009 BOUL. DE LA CONCORDE, SUITE 102 LAVAL, A6 H7E 2B5			COO, Canada & CSO

Signatures
/s/ Jason Comerford, attorney-in fact for Mr. Lemieux		11/16/2021
**Signature of Reporting Person		Date