Stock futures fell Thursday as a rally that lifted the S&P 500 to three straight higher sessions cooled.

These stocks were poised to make moves Thursday:

UnitedHealth fell 4.8% Thursday following a report from The Wall Street Journal that said the Justice Department was investigating the company for possible Medicare fraud. The healthcare-fraud unit of the department was overseeing the investigation that has been active since at least last summer, the Journal reported, citing people familiar with the matter. Sources said the federal investigation was focusing on the company's Medicare Advantage business practices.

Chinese e-commerce giant Alibaba reported quarterly revenue that missed Wall Street estimates on Thursday, as the firm works on new strategies to keep consumers spending amid persistent economic weakness and global trade uncertainties. U.S.-listed shares of the company fell 5% in premarket trading.

Foot Locker soared 70% in premarket trading to $21.93 after The Wall Street Journal reported Dick's Sporting Goods was close to buying the sneaker company for $24 a share or $2.3 billion. Foot Locker closed Wednesday at $12.87. The shares have declined, coming into Thursday, 41% this year. The Journal, citing people familiar with the matter, said the deal could be finalized as soon as Thursday. Dick's declined 6.5% in premarket trading.

Super Micro Computer was down 3.4% in premarket trading. Shares of the artificial-intelligence server maker closed at $44.99 on Wednesday, up 16%. It has risen for three straight sessions and has gained 41% over the span, according to Dow Jones Market Data. Boosting the stock this week has been positive analysts' coverage and a $20 billion deal with Saudi Arabian data center company DataVolt.

Cisco Systems boosted its fiscal-year sales outlook after reporting better-than-expected fiscal third-quarter adjusted earnings as revenue rose 11% from a year earlier to $14.15 billion. Cisco said it now expects fiscal-year revenue of $56.5 billion to $56.7 billion, up from a prior outlook of $56 billion to $56.5 billion. "The momentum we are seeing with AI is fueled by the power of our secure networking portfolio, our trusted global partnerships, and the value we bring to our customers, " said CEO Chuck Robbins. Shares of the networking and security company rose 4.5%.

CoreWeave, Inc., the AI-focused data-center operator, was down 9.1% in the premarket session. The company posted first-quarter revenue of $981.6 million, up 420% from a year earlier and better than analysts' expectations of $857 million, but said it anticipates capital spending for the year of between $20 billion to $23 billion, higher than Wall Street estimates. The company posted a quarterly loss of $1.49 a share, wider than a year-earlier loss of 62 cents. It was CoreWeave's first quarterly report since going public in late March.

Boot Barn jumped 15% after posting fiscal fourth-quarter earnings and revenue that rose from a year earlier. The Western apparel retailer said it anticipates first-quarter sales of between $483 million and $491 million compared with Wall Street estimates of $486.5 million. Boot Barn sees earnings in the first quarter of between $1.44 and $1.52 a share; analysts expect $1.44. The company's board also authorized a $200 million stock buyback program.

DXC Technology, the information-technology consultant, slumped 15% after saying it expects fiscal first-quarter profit of 55 cents to 65 cents a share, below estimates of 77 cents, and fiscal 2026 earnings of $2.75 to $3.25, below consensus of $3.41.

Earnings reports are expected Thursday from Walmart, Applied Materials, Deere, Take-Two Interactive Software, Doximity, Cava, and Birkenstock.

Walmart rose 0.2% in premarket trading ahead of fiscal first-quarter earnings from the world's largest retailer. Wall Street expects Walmart to post adjusted earnings of 58 cents a share on revenue of $165.6 billion. Same-store sales were forecast to rise by 3.9%. The retailer's report will serve as an early look at how the shifts in U.S. trade policy, namely tariffs, have affected American shoppers and company profits.