Here are some of the biggest movers of Thursday.
Stock decliners:
GameStop Corp.‘s stock
GME,
tanked 17% after the retailer fired Chief Executive Mike Furlong and said that its board elected activist investor Ryan Cohen as its executive chairman.
Shares of Smartsheet Inc.
SMAR,
fell 17% after the cloud-based work-management platform provider’s billings missed Wall Street estimates and its free-cash-flow outlook appeared light.
Shares of Oxford Industries Inc.
OXM,
dropped 5% in the aftermarket Wednesday after the parent company of Tommy Bahama and other brands lowered its guidance for the year, saying that consumers have grown more cautious.

