Ottawa Senators

Ottawa Senators acquire	Date	Toronto Maple Leafs acquire
Dion Phaneuf Matt Frattin Casey Bailey Ryan Rupert Cody Donaghey	February 9, 2016	Jared Cowen Colin Greening Milan Michalek Tobias Lindberg 2017 2nd round pick

Ottawa Senators acquire	Date	Nashville Predators acquire
Conor Allen	January 14, 2016	Patrick Mullen

Ottawa Senators acquire	Date	Edmonton Oilers acquire
Travis Ewanyk 2015 4th round pick	June 27, 2015	Eric Gryba

Buffalo Sabres acquire	Date	Ottawa Senators acquire
Robin Lehner David Legwand	June 26, 2015	2015 1st round pick

Dallas Stars acquire	Date	Ottawa Senators acquire
Jason Spezza Ludwig Karlsson	July 1, 2014	Alex Chiasson Alexander Guptill Nicholas Paul 2015 2nd round pick

Ottawa Senators acquire	Date	Edmonton Oilers acquire
Ales Hemsky	March 5, 2014	2015 3rd round pick 2014 5th round pick

Anaheim Ducks acquire	Date	Ottawa Senators acquire
Andre Petersson	March 5, 2014	Alex Grant

Ottawa Senators acquire	Date	Vancouver Canucks acquire
Patrick Mullen	March 4, 2014	Jeff Costello

Ottawa Senators acquire	Date	St. Louis Blues acquire
Future considerations	July 8, 2013	Pat Cannone

Ottawa Senators acquire	Date	Anaheim Ducks acquire
Bobby Ryan	July 5, 2013	Jakob Silfverberg Stefan Noesen 2014 1st round pick

Dallas Stars acquire	Date	Ottawa Senators acquire
Sergei Gonchar	June 7, 2013	2013 6th round pick

Tampa Bay Lightning acquire	Date	Ottawa Senators acquire
Ben Bishop	April 3, 2013	Cory Conacher 2013 4th round pick

Ottawa Senators acquire	Date	Minnesota Wild acquire
Matt Kassian	March 12, 2013	2014 6th round pick

Columbus Blue Jackets acquire	Date	Ottawa Senators acquire
Nick Foligno	July 1, 2012	Marc Methot

Ottawa Senators acquire	Date	Tampa Bay Lightning acquire
Matt Gilroy	February 27, 2012	Brian Lee

Ottawa Senators acquire	Date	St. Louis Blues acquire
Ben Bishop	February 26, 2012	2013 2nd round pick

Ottawa Senators acquire	Date	Arizona Coyotes acquire
Kyle Turris	December 17, 2011	David Rundblad 2012 2nd round pick

Ottawa Senators acquire	Date	Chicago Blackhawks acquire
Rob Klinkhammer	December 2, 2011	2013 conditionnal 7th round pick (In the event Klinkhammer plays five NHL regular-season games this season Ottawa will transfer its own seventh-round pick in 2013 to Chicago)

Columbus Blue Jackets acquire	Date	Ottawa Senators acquire
2011 3rd round pick (#66-Thomas Tynan)	June 25, 2011	Nikita Filatov

Detroit Red Wings acquire	Date	Ottawa Senators acquire
2011 2nd round pick (#35-Tomas Jurco) 2011 2nd round pick (#48-Xavier Ouellet)	June 24, 2011	2011 1st round pick (#24-Matt Puempel)