Companies that make health-care software saw their stocks rise Thursday after General Electric Co. agreed to buy IDX Systems Corp. at a 25 percent premium to the company’s share price.

South Burlington, Vt.-based IDX, which makes administrative and patient-tracking software used by hospitals and doctors’ offices, is going to GE’s health-care business for $1.2 billion, or $44 per share in cash. IDX shares climbed $8.08, or 23 percent, to close at $43.25, and shone a spotlight on the sector.

Among the winners: Cerner, of North Kansas City, Mo., which saw its shares rise $1.82, or 2.1 percent, to $86.60.