Amendment No. 1 to Transition Agreement by and between Patterson Companies, Inc. and Ann B. Gugino, dated April 11, 2018

This Amendment No. 1 to Transition Agreement (“Amendment”) is between Patterson Companies, Inc., on behalf of itself, its affiliated and related entities, and any of their respective direct or indirect subsidiaries (collectively referred to herein as “Patterson”), and Ann B. Gugino (referred to herein as “Employee”) (Patterson and Employee are collectively referred to herein as “Parties”).

WHEREAS, the Parties previously entered into a Transition Agreement, dated March 1, 2018 (the “Agreement”), pursuant to which, among other things, it was agreed that Employee’s employment with Patterson as Special Advisor would end effective July 31, 2018; and

WHEREAS, Employee has requested that the Separation Date be accelerated to May 25, 2018;

NOW, THEREFORE, in consideration of the mutual covenants and promises herein contained and other good and valuable consideration, receipt of which is hereby acknowledged, it is hereby agreed by and between the Parties as follows:

IN WITNESS WHEREOF, the Parties have executed this Amendment by their signatures below.

Dated: April 11, 2018                /s/ Ann B. Gugino        

Dated: April 11, 2018                Patterson Companies, Inc.

By: /s/ Mark S. Walchirk                    Mark S. Walchirk

Chief Executive Officer