Premarket Movers | Axon Enterprise Surges 16%; Tempus AI, MercadoLibre Slide 4% Each; HP Drops 5%; Workday Falls 9%; First Solar Sinks 14%

Taser-maker Axon Enterprise beat Wall Street estimates for fourth-quarter profit, driven by strong demand for its security devices and software products. Shares of the Arizona-based company were up 15.7% in premarket trading.

MercadoLibre posted a 12.5% decline in quarterly profit, missing analysts' projections, as the e-commerce firm was hit by credit and logistics investments. Revenue, however, came in above estimates, helped by business in Brazil and Mexico. Shares of the Uruguay-headquartered firm fell 4% in premarket trading.

Precision medicine technology company Tempus AI reported fourth-quarter results that exceeded analyst expectations, though shares fell 4.3% in premarket trading as the company’s 2026 revenue guidance failed to significantly surpass Wall Street estimates.

HP said it expected volatility in memory chips to persist even into next year and forecast a slump in its PC shipments, sending its shares down 5% in premarket trading.

Workday forecast fiscal 2027 subscription revenue below Wall Street estimates, signaling slower new client wins as corporations scrutinize large software purchases amid economic uncertainty. Shares of the enterprise software maker fell 9% in premarket trading.

First Solar, the largest U.S.-based solar panel maker, projected annual sales below Wall Street estimates, citing customer headwinds such as permitting delays under the Donald Trump administration, sending its shares down 14.46% in premarket trading.