Lululemon cut its profit forecast for the year, hurt by higher costs to mitigate U.S. tariffs and as tepid demand for its latest products failed to draw away buyers from upstart athleisure rivals such as Vuori. The shares slumped 21% in premarket trading.

Docusign trimmed its full-year outlook for billing, after the closely-watched metric fell short of its guidance in the first quarter. The e-signature company sank 17.7% in premarket trading.

Samsara delivered upbeat fiscal first-quarter results on Thursday, surpassing Wall Street estimates on both the top and bottom line. Despite the robust headline figures, shares sank 11% in premarket trading as investors reacted to a tempered growth outlook and signs of moderation in the pace of expansion.