Check out the companies making headlines in midday trading. Geron Corporation — Shares of the biotech company soared 90% after a U.S. Food and Drug Administration advisory panel voted in favor of Geron's blood disorder treatment, imetelstat. Geron expects a regulatory decision in June. Micron Technology — The semiconductor stock gained 2.4% after Citi named Micron one of its top picks and increased its price target by $55 to $150.
Smartsheet — The business software provider retreated by 3.2% after posting revenue guidance that was worse than analysts expected. Smartsheet penciled in revenue between $257 million and $259 million in the current quarter and a range of $1.113 billion to $1.118 billion for the full year. Meanwhile, analysts polled by FactSet forecast $262.3 million for the quarter and $1.14 billion for the year. Ulta Beauty — Shares edged lower by 5.