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ARTICLE · 24 JULY 2026

Q2 2026: Five Noteworthy Ontario Class Action Decisions

This quarter's Ontario class action decisions reveal evolving judicial approaches to parallel proceedings, individual action stays, and the predominance test. Courts examined novel duty-to-recall...

CanadaLitigation, Mediation & Arbitration

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This quarter featured several Ontario decisions refusing stays of parallel and individual actions. Courts also considered competing approaches to the predominance test, allowed failure-to-warn and recall-notice claims involving allegedly flawed product designs to proceed and varied an unpaid costs award to make plaintiff’s counsel personally liable.

Parallel Class Action Not Stayed

In Yee v. Telus International (Cda) Inc., 2026 ONSC 3165, in considering the statutory factors laid out for stays, the court declined to stay a proposed Ontario global securities class action concerning alleged omissions about Telus’s developing AI products, despite a similar B.C. proceeding. The Ontario action was further ahead and likely to move faster, lowering the risk of inconsistent outcomes.

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