X0407 4 2022-02-28 true 0001038133 HESKA CORP HSKA 0001577274 Eyl Steven M. 3760 ROCKY MOUNTAIN AVENUE LOVELAND CO 80538 true EVP, CCO & Pres.scil false Common Stock 2023-06-13 4 A 0 33111 0 A 60411 D Common Stock 2023-06-13 4 A 0 4056 0 A 64467 D Common Stock 2023-06-13 4 D 0 64467 120 D 0 D Non-Qualified Stock Option (right to buy) 60.94 2022-02-28 4 A 0 20000 0 A 2022-02-28 2030-04-15 Common Stock 20000 20000 D Non-Qualified Stock Option (right to buy) 60.94 2023-06-13 4 D 0 20000 D 2022-02-28 2030-04-15 Common Stock 20000 0 D Incentive Stock Option (right to buy) 60.94 2023-06-13 4 D 0 1640 D 2030-04-15 Common Stock 1640 0 D Non-Qualified Stock Option (right to buy) 60.94 2023-06-13 4 D 0 28360 D 2030-04-15 Common Stock 28360 0 D Incentive Stock Option (right to buy) 69.77 2023-06-13 4 D 0 1433 D 2028-03-06 Common Stock 1433 0 D Non-Qualified Stock Option (right to buy) 69.77 2023-06-13 4 D 0 18567 D 2028-03-06 Common Stock 18567 0 D Incentive Stock Option (right to buy) 18.13 2023-06-13 4 D 0 1146 D 2024-12-30 Common Stock 1146 0 D Incentive Stock Option (right to buy) 39.76 2023-06-13 4 D 0 3041 D 2025-12-28 Common Stock 3041 0 D Non-Qualified Stock Option (right to buy) 39.76 2023-06-13 4 D 0 1918 D 2025-12-28 Common Stock 1918 0 D Incentive Stock Option (right to buy) 72.85 2023-06-13 4 D 0 1372 D 2026-12-28 Common Stock 1372 0 D Non-Qualified Stock Option (right to buy) 72.85 2023-06-13 4 D 0 7691 D 2026-12-28 Common Stock 7691 0 D 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. Includes 396 shares of common stock of the Issuer purchased under the Issuer's employee stock purchase plan on May 26, 2023. 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. 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. Stock options of the Issuer became vested and exercisable upon achieving performance vesting conditions on February 28, 2022. 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. These stock options of the Issuer vested in two equal installments on December 31, 2021 and on December 31, 2022. These stock options of the Issuer vested in three approximately equal annual installments beginning on March 7, 2019 and ending on March 7, 2021. These stock options of the Issuer vested in monthly equal installments over four years through December 31, 2018. These stock options of the Issuer vested in monthly equal installments over four years through December 29, 2019. These stock options of the Issuer vested in monthly equal installments over four years through December 29, 2020. /s/ Catherine Grassman For: Steven M. Eyl 2023-06-13