NYSE trading floor 2012 2
NYSE trading floor. Reuters

The top after-market NYSE gainers Monday were Generac Holdlings, National Bank of Greece, Petrobras Argentina, Las Vegas Sands and Dillard's. The top after-market NYSE losers were Thor Industries, FTI Consulting, Equity Residential, Western Asset Managed Municipals Fund and Scorpio Tankers.

Gainers

Generac Holdlings Inc. (GNRC) stock climbed 7.03 percent to $34.26 in post-market trading. The company announced after markets closed Monday that the secondary offering of shares of its common stock by certain selling stockholders, which Generac Holdlings announced earlier Monday, was being withdrawn from the marketplace due to market conditions.

National Bank of Greece SA (NBG) shares climbed 6.11 percent to $2.43 in post-market trading. The stock has a 52-week low of $1.12, a 52-week high of $4.10 and $2.19 billion in market capitalization.

Petrobras Argentina SA (PZE) shares surged 5.12 percent to $4.31 in post-market trading.

Las Vegas Sands Corp. (LVS) shares gained 4.95 percent to $46.21 in post-market trading. The company announced Monday that its Board of Directors had approved a $2.75 per share special cash dividend on its outstanding common stock payable Dec. 18, 2012 to shareholders of record Dec. 10, 2012.

Dillard's, Inc. (DDS) shares rose 3.53 percent to $88.87 in post-market trading. The company announced Monday that its Board of Directors declared a regular, quarterly cash dividend of $0.05 per share as well as a special, one-time cash dividend of $5.00 per share.

Losers

Thor Industries Inc. (THO) shares tumbled 6.77 percent to $40.65 in post-market trading. The company announced the first quarter net profit of $30.99 million or $0.58 per share, up from $22.36 million or $0.41 per share in the same period last year but missed the analysts’ estimate of $0.62 per share.

FTI Consulting Inc. (FCN) shares declined 2.87 percent to $28.79 in post-market trading.

Equity Residential (EQR) shares fell 2.63 percent to $53.00 in post-market trading. The company announced Monday that it intended to offer approximately 19 million of its common shares.

Western Asset Managed Municipals Fund Inc. (MMU) shares fell 2.14 percent to $15.86 in post-market trading.

Scorpio Tankers Inc. (STNG) shares declined 2.08 percent to $6.17 in post-market trading. The stock has a 52-week low of $4.28, a 52-week high of $7.50 and $266.30 million in market capitalization.

Las Vegas Sands