Drug developer

SuperGen

( SUPG) was jumping 10% after Lazard Capital Markets upgraded the stock to hold from sell, based on valuation. Shares were adding 46 cents to $5.07.

UnitedHealth

(UNH) - Get UnitedHealth Group Incorporated Report

was also rising after the health insurer said it will be current with filings to the

Securities and Exchange Commission

on March 15. UnitedHealth was recently up $2.10, or 4%, at $54.84.

On the flipside,

Noven Pharmaceuticals

(NOVN) - Get Novan, Inc. Report

sank 10% even after the company posted fourth-quarter earnings that rose 18% from the year-ago period to beat estimates. Deutsche Securities downgraded the stock to hold from buy, and shares slipped $2.55 to $22.86.

Among healthcare winners Friday,

Affymetrix

TheStreet Recommends

(AFFX)

was rising 4.8% to $26.86.

NeoPharm

( NEOL) was higher by 3.9% to $2.09.

Nektar Therapeutics

(NKTR) - Get Nektar Therapeutics Report

was adding 2.1% at $11.96.

Among decliners,

Medarex

( MEDX) was off 3.5% at $12.41.

Sepracor

( SEPR) was losing 2.9% at $50.39.

Medicines Co.

(MDCO) - Get Medicines Company Report

was lower by 2.2% to $26.29.