The story
In August 2004, two companies - Groupe Essaim and Gestion Santé Services Obonsoins Inc—regrouped to form Groupe PharmEssor. The three pharmacy chains affected by this merger - Essaim, Obonsoins and Santé Services—were initially kept separate and intact by PharmEssor. However, in February 2006, PharmEssor consolidated all of its operations under a single banner, Proxim, hence eliminating the previous banners. The name "Proxim" was inspired from the word “proximity” to describe the group's great accessibility to pharmaceutical cares.
One year after the creation of Proxim, the Proximed banner was created in February 2007. Thus, an estimate of 31 selected locations operate today under the name Proximed.
On July 1, 2008, McKesson Canada acquired Proxim. In September 2017, McKesson Canada completed its acquisition of Uniprix which would be headed by the same president who oversees the Proxim chain. Proxim and Uniprix have since remained separate chains of McKesson, much the same way that competitors Jean Coutu and Brunet both live on within the ownership of Metro Inc.
From Wikipedia’s article on Proxim, shared under CC BY-SA 4.0.4