Sec Form 4 Filing - NAPOLITANO JASON A @ HESKA CORP - 2019-02-14

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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person NAPOLITANO JASON A 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) COO, Chief Strategist and Sec. (Last) (First) (Middle) 3760 ROCKY MOUNTAIN AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 02/14/2019 (Street) LOVELAND, CO80538 4. If Amendment, Date Original Filed (MM/DD/YY) 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)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction 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 02/14/2019 S( 1 ) 200 D $ 96.7175 ( 2 ) 61,992 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 500 D $ 96.956 ( 3 ) 61,492 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 290 D $ 96.9731 ( 4 ) 61,202 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 205 D $ 97.0146 ( 5 ) 60,997 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 105 D $ 97.1833 ( 6 ) 60,892 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 187 D $ 97.2374 ( 7 ) 60,705 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 972 D $ 97.2981 ( 8 ) 59,733 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 320 D $ 97.3197 ( 9 ) 59,413 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 105 D $ 97.3395 ( 10 ) 59,308 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 300 D $ 97.3833 ( 11 ) 59,008 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 200 D $ 97.42 ( 12 ) 58,808 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 300 D $ 97.4633 ( 13 ) 58,508 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 200 D $ 97.4914 ( 14 ) 58,308 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 300 D $ 97.54 ( 15 ) 58,008 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 200 D $ 97.59 ( 16 ) 57,808 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 416 D $ 97.6796 ( 17 ) 57,392 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 400 D $ 97.9975 ( 18 ) 56,992 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 200 D $ 98.1275 ( 19 ) 56,792 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 388 D $ 98.3665 ( 20 ) 56,404 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 312 D $ 98.4132 ( 21 ) 56,092 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 500 D $ 98.536 ( 22 ) 55,592 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 185 D $ 98.6249 ( 23 ) 55,407 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 97 D $ 98.7074 ( 24 ) 55,310 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 203 D $ 98.7803 ( 25 ) 55,107 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 115 D $ 98.9361 ( 26 ) 54,992 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 200 D $ 99.04 ( 27 ) 54,792 ( 28 ) D Common Stock 02/14/2019 S( 1 ) 100 D $ 99.13 54,692 ( 28 ) D Common Stock 100 I by Spouse ( 29 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other NAPOLITANO JASON A 3760 ROCKY MOUNTAIN AVENUE LOVELAND, CO80538 COO, Chief Strategist and Sec. Signatures /s/ Jason A. Napolitano 02/14/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on December 3, 2018. ( 2 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 150 shares sold at a price of $96.69 and with 50 shares sold at a price of $96.80. ( 3 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 100 shares sold at a price of $96.94 and with 400 shares sold at a price of $96.96. ( 4 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 200 shares sold at a price of $96.97 and with 90 shares sold at a price of $96.98. ( 5 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 105 shares sold at a price of $97.00 and with 100 shares sold at a price of $97.03. ( 6 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 5 shares sold at a price of $97.05 and with 100 shares sold at a price of $97.19. ( 7 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 87 shares sold at a price of $97.20 and with 100 shares sold at a price of $97.27. ( 8 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 185 shares sold at a price of $97.29 and with 787 shares sold at a price of $97.30. ( 9 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 10 shares sold at a price of $97.31 and with 310 shares sold at a price of $97.32. ( 10 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 5 shares sold at a price of $97.33 and with 100 shares sold at a price of $97.34. ( 11 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 100 shares sold at a price of $97.35 and with 200 shares sold at a price of $97.40. ( 12 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 100 shares sold at a price of $97.41 and with 100 shares sold at a price of $97.43. ( 13 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 100 shares sold at a price of $97.45 and with 200 shares sold at a price of $97.47. ( 14 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 86 shares sold at a price of $97.48 and with 114 shares sold at a price of $97.50. ( 15 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 100 shares sold at a price of $97.52 and with 200 shares sold at a pric e of $97.55. ( 16 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 100 shares sold at a price of $97.56 and with 100 shares sold at a price of $97.62. ( 17 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 216 shares sold at a price of $97.67 and with 200 shares sold at a price of $97.69. ( 18 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 200 shares sold at a price of $97.975 and with 200 shares sold at a price of $98.02. ( 19 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 50 shares sold at a price of $98.06 and with 150 shares sold at a price of $98.15. ( 20 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 100 shares sold at a price of $98.27 and with 288 shares sold at a price of $98.40. ( 21 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 212 shares sold at a price of $98.41 and with 100 shares sold at a price of $98.42. ( 22 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 200 shares sold at a price of $98.53 and with 300 shares sold at a price of $98.54. ( 23 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 93 shares sold at a price of $98.60 and with 92 shares sold at a price of $98.65. ( 24 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 25 shares sold at a price of $98.70 and with 72 shares sold at a price of $98.71. ( 25 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 200 shares sold at a price of $98.78 and with 3 shares sold at a price of $98.80. ( 26 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 15 shares sold at a price of $98.81 and with 100 shares sold at a price of $98.955. ( 27 )The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions with 100 shares sold at a price of $99.00 and with 100 shares sold at a price of $99.08. ( 28 )Includes one share jointly owned with Robert Grieve. ( 29 )Mr. Napolitano disclaims beneficial ownership of all securities of the Issuer owned by his wife.

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).

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