Workday jumps after activist investor Elliott discloses a stake in the HR software company, and StubHub makes its trading debut.

Shares of a ridesharing giant fell on Wednesday, Sept. 17, 2025, after a competitor's announcement, while a stake from an activist investor helped boost an HR software firm.

Shopify (TSX:SHOP) has rallied ~38% in three months on improving results and AI momentum but looks expensive (~82× trailing P ...