Check out the companies making headlines in midday trading: Palantir — The technology stock tumbled 11.9%, on track for its worst day since May . The stock is also on pace to see back-to-back losses of 10% or more for the first time ever. Shares took a hit after the disclosure of a new stock sale plan by CEO Alex Karp and comments from Defense Secretary Pete Hegseth pledging to slash defense spending. Robinhood Markets — The commission-free financial services provider briefly fell as much as 8.4% as part of a sell-off in speculative stocks such as Palantir. Walmart — The big-box discount retailer fell 6.6% after Walmart’s forward financial guidance disappointed investors. For the fiscal year ending Jan. 31, 2026, Walmart forecasts earnings per share ranging between $2.50 and $2.60 per share. Walmart, a barometer for U.S. consumer spending, also said it would not be “immune” to effects from proposed tariffs on goods from Mexico and Canada. Klaviyo — Shares plunged 10% following the data technology company’s weaker-than-expected operating income guidance for the current quarter of between $25.5 million and $28.5 million, excluding items, below the $32 million that analysts polled by FactSet estimated. Fourth-quarter earnings and revenue beat the Street’s expectations. Alibaba — The Chinese e-commerce giant surged more than 8% after posting a sharp profit hike in the December quarter due to strength in its Cloud Intelligence unit and e-commerce business. The Alibaba CEO cited “substantial progress” in its artificial intelligence-driven strategies. Carvana — The online platform for used car sales plunged nearly 17% after gross profit per unit for retail sales came in at $6,671 in the fourth quarter, missing analysts’ calls for $6,851, per FactSet. Earnings of 56 cents per share and revenue of $3.55 billion topped analysts’ forecasts. Hasbro — The toymaker soared 11.2% after beating consensus estimates in its fourth quarter. Hasbro posted adjusted earnings of 46 cents per share on $1.1 billion in revenue, ahead of the 34 cents in earnings per share and $1.03 billion in revenue estimated by analysts, according to FactSet. Shake Shack — The hamburger chain gained 8.4% after it reported stronger-than-expected fourth-quarter results. Total revenue rose 14.8% year over year as Shake Shack opened 19 company-operated locations and nine licensed Shacks in the quarter. Wayfair — The furniture retailer slipped more than 3% after it reported a larger-than-expected loss in the fourth quarter. Wayfair lost an adjusted 25 cents per share, while analysts polled by FactSet forecast a loss of 1 cent. Top-line revenue came in at $3.12 billion, topping a FactSet consensus estimate of $3.07 billion. Amplitude — The software stock popped 16.6% after posting a top- and bottom-line beat in the fourth quarter. Amplitude earned 2 cents per share, excluding items, on $78.1 million in revenue, while analysts polled by FactSet called for earnings of 1 cent per share on revenue of $76.7 million. Baird upgraded its investment opinion to outperform after the release. Clearwater Analytics — Shares of the fintech company rallied 11.6% on the back of strong quarterly results. Clearwater earned an adjusted 13 cents per share on $126.5 million in revenue in the fourth quarter, topping predictions of 11 cents in earnings per share and $120.3 million in revenue from analysts surveyed by FactSet. Bausch Health — The eye-care health stock climbed more than 11%. Although Bausch’s adjusted EBITDA margin fell short of consensus estimates, revenue of $1.28 billion in its main eye-care segment topped analysts’ forecasts for $1.24 billion, according to FactSet. AppLovin — Shares of the mobile tech company sold off 10.7%. Short seller Edwin Dorsey wrote in his newsletter Thursday that AppLovin’s meteoric rise — up 656% over the past 12 months — “is fueled by low-quality revenue growth from ads that are deceptive, predatory and at times unreadable or unclickable.” — CNBC’s Pia Singh, Alex Harring, Yun Li, Sean Conlon and Scott Schnipper contributed reporting.