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| Year | Name | Direction | From/To | Category |
|---|---|---|---|---|
| 1990 | Jean Lapierre | Gained | from Liberal | Started New Party |
| 1990 | Gilbert Chartrand | Gained | from Progressive Conservative | Started New Party |
| 1990 | Gilles Rocheleau | Gained | from Liberal | Started New Party |
| 1990 | Benoît Tremblay | Gained | from Progressive Conservative | Started New Party |
| 1990 | Pierrette Venne | Gained | from Progressive Conservative | Started New Party |
| 1990 | Lucien Bouchard | Gained | from Prog. Conservative | Started New Party |
| 1990 | Gilles Duceppe | Gained | from Independent | Started New Party |
| 1990 | François Gérin | Gained | from Progressive Conservative | Started New Party |
| 1990 | Nic Leblanc | Gained | from Progressive Conservative | Started New Party |
| 1990 | Louis Plamondon | Gained | from Progressive Conservative | Started New Party |
| 1997 | Bernard St-Laurent | Lost | to Independent | Fought Their Leader |
| 1999 | Réjean Lefebvre | Lost | to Independent | Kicked Out |
| 2002 | Ghislain Lebel | Lost | to Independent | Fought Their Leader |
| 2003 | Pierre Brien | Lost | to Independent | Changed Beliefs |
| 2003 | Robert Lanctôt | Lost | to Liberal | Switched Sides |
| 2007 | Louise Thibault | Lost | to Independent | Fought Their Leader |
| 2013 | Maria Mourani | Lost | to Independent | Changed Beliefs |
| 2013 | Claude Patry | Gained | from New Democratic Party | Changed Beliefs |
| 2014 | Jean-François Fortin | Lost | to Strength in Democracy | Started New Party |
| 2014 | André Bellavance | Lost | to Independent | Stood on Principle |
| 2018 | 7 Bloc Québécois MPs (Québec debout crisis) | Lost | to Independent / Québec debout | Fought Their Leader |