Plateau-Mont-Royal, resigns. 3 October 2019: Cathy Wong, speaker of the city council and city councillor for the district of Peter-McGill, sitting as an independent, joins Projet Montréal. 7 October 2019: Luc Rabouin of Projet Montréal is elected in a by-election to serve as borough mayor of Le Plateau-Mont-Royal, succeeding Luc Ferrandez. 21 October 2019: Patricia Lattanzio, city councillor for the district of Saint-Léonard-Est, leave the city council upon being elected to the House of Commons of Canada. 24 January 2020: Sue Montgomery, borough mayor of Côte-des-Neiges—Notre-Dame-de-Grâce, is expelled from the Projet Montréal caucus after refusing to fire a member of her staff that had been accused of psychological harassment. She sits as an independent. 23 October 2020: Julie-Pascale Provost, borough councillor for the district of Du Canal, is expelled from Projet Montréal and sits as an independent. 9 December 2020: Christian Arseneault, city councillor for the district of Loyola, leaves Projet Montréal and sits as an independent. 17 December 2020: Christine Gosselin, city councillor for the district of Vieux-Rosemont, leaves Projet Montréal and sits as an independent. 26 January 2021: Giuliana Fumagalli, borough mayor for the borough of Villeray–Saint-Michel–Parc-Extension, sitting as an independent, creates a new party, Quartiers Montréal. 11 March 2021: Sue Montgomery, borough mayor of Côte-des-Neiges—Notre-Dame-de-Grâce, sitting as an independent, creates a new party, Courage - Équipe Sue Montgomery. 17 March 2021: Jean-Marc Corbeil, borough councillor for the district of Robert-Bourassa, is expelled from Ensemble Montréal and sits as an independent. 21 April 2021: Hadrien Parizeau, city councillor for the district of Saint-Sulpice, sitting as an independent, joins back Ensemble Montréal. 4 June 2021: Julie-Pascale Provost, borough councillor for the district of Du Canal, sitting as an independent, joins Ensemble Montréal. 16 June 2021: Marvin Rotrand, city councillor for the district of Snowdon, sitting as an independent, joins Ensemble Montréal. 18 June 2021: Giovanni Rapanà, city councillor for the district of Rivière-des-Prairies, sitting as an independent, joins back Ensemble Montréal. 13 July 2021: Véronique Tremblay, borough councillor for the district of Champlain–L'Île-des-Sœurs, leaves Ensemble Montréal to join Projet Montréal. 16 August 2021: Christian Arseneault, city councillor for the district of Loyola, announces his resignation. Changes since 7 November 2021 election 7 November 2021: Even though he was elected under the Projet Montréal label, Craig Sauvé announced he would sit as independent. 10 February 2022: Serge Sasseville, city councillor for the district of Peter-McGill, leaves Ensemble Montréal to sit