Premarket Movers | Pinterest Tumbles 20%; Upstart Plunges 15%; Super Micro Sinks 10%; Novo Gains 2%

Pinterest forecast fourth-quarter revenue slightly below Wall Street estimates on Tuesday, signaling fierce competition from larger platforms such as Meta during the holiday season, sending its shares down 19.5% in premarket trading on Wednesday.

Clover Health reported its third-quarter 2025 earnings, revealing a significant earnings per share (EPS) miss. The shares sank 18.2% in premarket trading on Wednesday.

Lending company Upstart expects its growth to slow going forward — and by more than Wall Street was expecting. Shares of the financial-technology company, which uses AI to inform lending decisions, fell 14.6% in premarket trading on Wednesday following downbeat guidance for the December quarter.

Arista Networks posted higher revenue and profit during the third quarter, but its guidance for the current quarter suggests sales growth will slow to a crawl on a sequential basis. The shares plunged 11.4% in premarket trading on Wednesday.

Super Micro Computer missed Wall Street estimates for quarterly profit and revenue, hit by a shift in delivery schedules for large artificial intelligence deals, sending the server maker's shares down 9.6% in premarket trading on Wednesday.

Mediterranean restaurant chain Cava Group cut its annual same-store sales growth forecast for the second time this year, signaling sluggish spending on dining out by budget-conscious customers. Shares of the company were down 9% in premarket trading on Wednesday.

Kratos Defense & Security Solutions reported third quarter earnings that beat analyst expectations, but shares fell 8.9% in premarket trading on Wednesday. as the defense technology company’s fourth quarter revenue guidance came in below Wall Street estimates.

Astera Labs handily beat analyst estimates for the third quarter and guided higher than views for the current period. But ALAB stock fell 3.5% in premarket trading on Wednesday on profit margin concerns.

Tempus AI, a company that captured the attention of retail shareholders and surged to a valuation of more than $15 billion in spite of persistent losses, reported better-than-expected Q3 results after the close of trading on Tuesday. But investors seemed unimpressed, as the stock dove 3% in premarket trading on Wednesday.

Toyota shares dropped 2.4% in premarket trading after the carmaker’s annual profit guidance disappointed investors, a sign that the impacts of US President Donald Trump’s tariffs are still weighing on its bottom line.

Skyworks Solutions forecast first-quarter revenue and profit above Wall Street estimates, signaling robust demand for its radio-frequency chips used in Apple's latest 5G iPhones. The shares gained 1.6% in premarket trading on Wednesday.

Novo Nordisk pared its forecast for a fourth time this year on lagging sales of its blockbuster drugs Wegovy and Ozempic, underscoring the urgency facing its new chief executive. But the shares rose 2% in premarket trading on Wednesday.

Amgen reported quarterly financial results that beat Wall Street expectations, and raised its full-year outlook, as 12% sales growth offset expenses related to experimental weight-loss drug MariTide and a higher tax rate. The shares rose 2.5% in premarket trading on Wednesday.

Rivian surpassed third-quarter revenue expectations, fueled by strong deliveries as U.S. consumers rushed to grab a federal tax incentive on electric vehicle purchases before its expiry. The shares rose 3.4% in premarket trading on Wednesday.

Toast rose 4.5% after beating estimates. Revenue for the quarter came in at $1.63 billion versus the consensus estimate of $1.58 billion.

Ouster beat on both earnings and revenue Tuesday, posting a smaller loss than expected and delivering record sensor shipments. The stock fought back all its earlier loses on day and jumped 13.1% in premarket trading on Wednesday.

Lumentum shares surged 15.5% in premarket trading on Wednesday after the optical components maker reported strong fiscal first-quarter results and issued guidance that significantly exceeded analyst expectations, driven by robust demand from AI data center applications.