From the official NHL release:
NHL RELEASES FREE AGENT LIST
NEW YORK (July 1, 2016) -- The National Hockey League today released a list of players who are restricted free agents under Group 2, unrestricted free agents under Group 3 and Group 6 and unrestricted free agents by virtue of not receiving a qualifying offer.
Some of these players may recently have signed with their respective Clubs; however, their contracts had not yet been filed with the League.
FREE AGENTS SUBJECT TO COMPENSATION AND RIGHT TO MATCH - GROUP 2
The players listed below have been tendered a qualifying offer by their respective Clubs and are subject to draft-choice compensation and right to match.