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 *

Eyl Steven M.		 2. Issuer Name and Ticker or Trading Symbol

HESKA CORP [ HSKA ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
EVP, CCO & Pres.scil
(Last)          (First)          (Middle)

3760 ROCKY MOUNTAIN AVENUE		 3. Date of Earliest Transaction (MM/DD/YYYY)

2/28/2022
(Street)

LOVELAND, CO 80538		 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
(City)        (State)        (Zip)
Rule 10b5-1(c) Transaction Indication
☐ Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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
Common Stock 6/13/2023  A(1)  33111 A$0 60411 (2)D  
Common Stock 6/13/2023  A(3)  4056 A$0 64467 D  
Common Stock 6/13/2023  D(4)  64467 D$120 0 D  

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 Security3. Trans. Date3A. Deemed Execution Date, if any4. 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 Date7. 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Non-Qualified Stock Option (right to buy) $60.94 2/28/2022  A (5)  20000    2/28/2022 4/15/2030 Common Stock 20000 $0 20000 D  
Non-Qualified Stock Option (right to buy) $60.94 6/13/2023  D     20000  2/28/2022 4/15/2030 Common Stock 20000  (6)0 D  
Incentive Stock Option (right to buy) $60.94 6/13/2023  D     1640   (7)4/15/2030 Common Stock 1640  (6)0 D  
Non-Qualified Stock Option (right to buy) $60.94 6/13/2023  D     28360   (7)4/15/2030 Common Stock 28360  (6)0 D  
Incentive Stock Option (right to buy) $69.77 6/13/2023  D     1433   (8)3/6/2028 Common Stock 1433  (6)0 D  
Non-Qualified Stock Option (right to buy) $69.77 6/13/2023  D     18567   (8)3/6/2028 Common Stock 18567  (6)0 D  
Incentive Stock Option (right to buy) $18.13 6/13/2023  D     1146   (9)12/30/2024 Common Stock 1146  (6)0 D  
Incentive Stock Option (right to buy) $39.76 6/13/2023  D     3041   (10)12/28/2025 Common Stock 3041  (6)0 D  
Non-Qualified Stock Option (right to buy) $39.76 6/13/2023  D     1918   (10)12/28/2025 Common Stock 1918  (6)0 D  
Incentive Stock Option (right to buy) $72.85 6/13/2023  D     1372   (11)12/28/2026 Common Stock 1372  (6)0 D  
Non-Qualified Stock Option (right to buy) $72.85 6/13/2023  D     7691   (11)12/28/2026 Common Stock 7691  (6)0 D  
Explanation of Responses:
(1) Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated as of March 31, 2023, by and among the Issuer, Antech Diagnostics, Inc., a California corporation ("Acquiror"), Helsinki Merger Sub LLC, a Delaware limited liability company and a wholly-owned subsidiary of Acquiror, and, solely for purposes of Section 9.15 of the Merger Agreement, Mars, Incorporated, a Delaware corporation, these shares of performance-based restricted stock of the Issuer were fully accelerated assuming maximum level of performance immediately prior to the effectiveness of the merger.
(2) Includes 396 shares of common stock of the Issuer purchased under the Issuer's employee stock purchase plan on May 26, 2023.
(3) Pursuant to the Merger Agreement, these performance-based restricted stock units were fully accelerated assuming target level of performance immediately prior to the effectiveness of the merger.
(4) Disposed of pursuant to the Merger Agreement in exchange for cash consideration of $120.00 per share of common stock of the Issuer (the "Merger Consideration") on the effective date of the merger.
(5) Stock options of the Issuer became vested and exercisable upon achieving performance vesting conditions on February 28, 2022.
(6) Stock options of the Issuer were canceled in the merger in exchange for an amount in cash equal to the difference, if any, between the Merger Consideration and the exercise price of such stock options.
(7) These stock options of the Issuer vested in two equal installments on December 31, 2021 and on December 31, 2022.
(8) These stock options of the Issuer vested in three approximately equal annual installments beginning on March 7, 2019 and ending on March 7, 2021.
(9) These stock options of the Issuer vested in monthly equal installments over four years through December 31, 2018.
(10) These stock options of the Issuer vested in monthly equal installments over four years through December 29, 2019.
(11) These stock options of the Issuer vested in monthly equal installments over four years through December 29, 2020.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director10% OwnerOfficerOther
Eyl Steven M.
3760 ROCKY MOUNTAIN AVENUE
LOVELAND, CO 80538

EVP, CCO & Pres.scil
Signatures
/s/ Catherine Grassman For: Steven M. Eyl6/13/2023
**Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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