Monday's Health Winners and Losers

Rigel Pharmaceuticals (RIGL Quote)'s shares fell 35 cents, or 3.1%, to $10.95. The company said it will offer 5 million shares of common stock under an existing shelf registration statement. It anticipates that the underwriters will be granted an overallotment option for an additional 750,000 shares.

Dialysis center operator DaVita(DVA Quote) was one of the biggest movers on the winning side. Its shares rose 63 cents, or 1.2%, to $55.10 after the company reported strong profit growth and boosted full-year guidance. Net income for the first quarter was $76.6 million, or $0.72 per share, compared with $57.5 million, or $0.55 per share, for the same period last year. Earnings per share were in line with expectations of analysts surveyed by Thomson Financial. The company raised guidance for operating income to between $740 million to $780 million, from $700 million to $760 million.

Among other winners Monday, Avanir Pharmaceuticals (AVNR Quote) was up 27 cents, or 8.1%, to $3.61. Columbia Laboratories (CBRX Quote) was up 10 cents, or 4.1%, to $2.57, and Atherogenics(AGIX Quote) was up 49 cents, or 15.9%, to $3.57.