The 2025 Société de transport de Montréal strikes refer to a series of strikes of 2,400 maintenance workers & 4,500 Bus/Metro operators and station agents employed by the Société de transport de Montréal (STM) represented by Confédération des syndicats nationaux (CSN) and Canadian Union of Public Employees (CUPE / SCFP) respectively.
The first round of strikes from the maintenance workers lasted from June 9 to June 17, 2025. It affected transit, including buses and the Montreal Metro. However, adaptive transport ran unaffected.
A second strike took place from September 22 to October 5. During this time, the bus and metro operated as usual during peak hours and a late-night block, and did not run during off-peak hours on scheduled days. Adaptive transport was fully operational at all times during the strike.
Strikes resumed on November 1 which were intended to last for 4 weeks at a rush hour and late-night schedule only. On November 11, the CSN announced a suspension of the strike which came into effect the next day at 6am. After labor negotiations stalled, the CSN submitted a strike notice on 9 December, before delaying their strike two days because the labour board of Montreal declared the notice non-compliant, which lasted until 11 January.
In April 2026, a new agreement was ratified by the workers with 86% voting in favour of the new contract.
Background The collective bargaining agreement expired in January 2025 and negotiations did not produce a new contract.
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