Insider Bruce Garrioch for the Ottawa Senators reported that the team made an attempt to acquire Ullmark at the trade deadline but they couldn't get anything finalized. He has since reported that it seems the Senators could still be interested and would be willing to give some massive pieces up to acquire Linus Ullmark.
The Bruins would be getting a very solid offensive defensemen in Jakob Chychrun and a first-round pick along with him for Linus Ullmark, which should be a no doubter for the Bruins as they don't have many picks, and it's hard to come by game changing offensive defensemen.