The top after-market NASDAQstock market gainers are: Fortinet, Solta Medical, TD Ameritrade Holding, Cathay General Bancorp and Hologic Inc. The top after-market NASDAQ stock market losers are: Netflix, Momenta Pharmaceuticals, Saba Software, Ultra Clean Holdings and Healthways.

Gainers:

Fortinet Inc. (NASDAQ: FTNT) shares climbed 10.32 percent to $21.05 in post-market trading sessions. The company reported a third quarter net income of $17.9 million or $0.11 per share compared to $14.0 million or $0.09 per share in the same quarter a year ago.

Solta Medical Inc. (NASDAQ: SLTM) shares gained 4.9 percent to $2.14 in aftermarket trading sessions. The company announced that it has received U.S. Food and Drug Administration (FDA) clearance of the second generation LipoSonix system, specifically indicated for non-invasive waist circumference reduction.

TD Ameritrade Holding Corp. (NASDAQ: AMTD) shares gained 4.13 percent to $16.90 in aftermarket trading sessions. The stock has a 52-week low of $13.43, a 52-week high of $22.90 and has $9.17 billion in market capitalization.

Cathay General Bancorp (NASDAQ: CATY) shares advanced 3.42 percent to $13.55 in post-market trading sessions.

Hologic Inc. (NASDAQ: HOLX) shares gained 2.45 percent to $16.50 in aftermarket trading sessions. The stock has a 52-week low of $13.90, a 52-week high of $23.24 and has $4.22 billion in market capitalization.

Losers:

Netflix Inc. (NASDAQ: NFLX) shares slumped 27.84 percent to $85.75 in aftermarket trading sessions, as its fourth quarter earnings guidance fell short of expectations. For the fourth quarter, the company expects earnings to be in a range of $0.36 to $0.70 per share on revenue of $841 million to $875 million, while analysts’ expect earnings of $1.09 per share on revenues of $919.96 million.

Momenta Pharmaceuticals Inc. (NASDAQ: MNTA) shares plunged 15.83 percent to $11.75 in post-market trading sessions.

Saba Software Inc. (NASDAQ: SABA) shares plunged 14.29 percent to $6 in post market trading session. The company stock surged more than 7 percent in regular trading session.

Ultra Clean Holdings Inc. (NASDAQ: UCTT) shares declined 11.24 percent to $4.42 in aftermarket trading session. The company reported a third quarter net income of $3.2 million or $0.14 per share compared to $6.7 million or $0.29 per share in the same quarter last year and against analysts’ estimation of $0.17 per share.

Healthways Inc. (NASDAQ: HWAY) shares plunged 10.56 percent to $9.99 in aftermarket trading sessions. The company reported a third quarter net income of $9.5 million or $0.28 per share, down from $10.5 million or $0.30 per share in the same quarter a year-ago.

For fiscal 2011, the company narrowed its earnings guidance to a range of $0.90 to $1.00 per compared to its earlier estimation of $0.90 to $1.08 per share.