rewrite this title Stocks making the biggest moves midday: Southwest Airlines, Circle Internet Group, Halliburton & more

Check out the companies making headlines in midday trading:

Pfizer — The pharma giant issued disappointing 2026 earnings guidance. Pfizer forecast an adjusted profit ranging between $2.80 per share and $3 per share for the coming year. Analysts polled by LSEG expected earnings per share of $3.05 for 2026. Revenue for the period is anticipated to range from $59.5 billion to $62.5 billion, which would be little changed from the company’s 2025 sales forecast for $62 billion. Shares slid more than 4%.

Elanco Animal Health — The pet vaccine maker rose more than 3% after CEO Jeffrey Simmons and CFO Robert VanHimbergen disclosed purchases, according to regulatory filings.

Circle Internet Group – Shares of the stablecoin issuer jumped more than 8%. Visa announced on Tuesday that U.S issuer and acquirer partners can settle transactions with Visa in Circle’s USDC, a stablecoin that’s pegged to the U.S. Dollar. Visa shares were little changed.

Southwest Airlines – The airline’s shares climbed more than 2% and touched a new 52-week high after Barclays upgraded the name to overweight from equal weight. Southwest “stands to benefit from a material upgrade in commercial strategy,” Barclays wrote in a research note, adding that the airline is a top idea for 2026.

Energy names – Shares of oil giants tumbled as U.S. crude oil dropped to its lowest price since 2021. West Texas Intermediate crude slid as low as $54.98 a barrel on Tuesday as traders contend with a surplus and reduced geopolitical risk. Halliburton shares lost 5%, while APA dropped 4.7%.

Estee Lauder – The cosmetics manufacturer saw shares advance 3% after Bank of America added Estee Lauder to its US 1 List. The firm rates the beauty company a buy, deeming it its top pick in beauty for 2026.