A pedestrian walks past the NASDAQ building in New York City
A pedestrian walks past the NASDAQ building in New York City in this April 30, 2010 file photo. REUTERS

The top after-market NASDAQ gainers Tuesday were Amazon.com Inc, Fortinet Inc, Gevo Inc and PAREXEL International Corporation.

Amazon.com Inc (NASDAQ: AMZN) shares gained 8.51 percent to $282.50 in post-market trading. The company reported that its net income dropped to $97 million or $0.21 per share in the fourth quarter compared to $177 million or $0.38 per share in the same period the earlier year.

Fortinet Inc (NASDAQ: FTNT) shares climbed 6.67 percent to $21.02 in post-market trading. The stock has a 52-week low of $17.53, a 52-week high of $28.82 and $3.15 billion in market capitalization.

Gevo Inc (NASDAQ: GEVO) shares advanced 3.36 percent to $2.46 in post-market trading. The stock has a 52-week low of $1.36, a 52-week high of $11.29 and $91.74 million in market capitalization.

PAREXEL International Corporation (NASDAQ: PRXL) shares rose 3.07 percent to $34.90 in post-market trading. The stock has a 52-week low of $22.47, a 52-week high of $34.79 and $1.99 billion in market capitalization.

The top after-market NASDAQ losers Tuesday were Gentex Corporation, Websense Inc, Steel Dynamics Inc, ARIAD Pharmaceuticals Inc and Broadcom Corporation.

Gentex Corporation (NASDAQ: GNTX) shares declined 3.44 percent to $18.70 in post-market trading. The stock has a 52-week low of $14.38, a 52-week high of $29.45 and $2.77 billion in market capitalization.

Websense Inc (NASDAQ: WBSN) shares slumped 2.98 percent to $15.65 in post-market trading. The stock has a 52-week low of $12.70, a 52-week high of $22.15 and $588.73 million in market capitalization.

Steel Dynamics Inc (NASDAQ: STLD) shares dropped 2.67 percent to $15.02 in post-market trading. The stock has a 52-week low of $10.11, a 52-week high of $16.66 and $3.38 billion in market capitalization.

ARIAD Pharmaceuticals Inc (NASDAQ: ARIA) shares fell 1.11 percent to $20.10 in post-market trading. The stock has a 52-week low of $13.92, a 52-week high of $25.40 and $3.39 billion in market capitalization.

Broadcom Corporation (NASDAQ: BRCM) shares declined 1.07 percent to $33.35 in post-market trading. The company reported that its net income dropped to $251 million or $0.43 per share in the fourth quarter compared to $254 million or $0.45 per share in the same period the earlier year.

New york city NASDAQ OMX Group