Armstrong Thomas J 4

4 · SOUTHWEST GAS CORP · Filed Jun 22, 2005

Form 4

Period: 2005-06-21

SR VICE PRES/GAS RESOURCES

Transactions

Sale
Common stock
2005-06-21$25.54/sh−10,000$255,400→ 13,559 total
Exercise/Conversion
Stock Option (right to buy) 2002
2005-06-21$25.54/sh−7,000$178,780→ 3,000 total
Exercise: $21.74From: 2003-07-16Exp: 2012-07-15→ Common stock (7,000 underlying)
Sale
Common stock
2005-06-21$25.54/sh−5,000$127,700→ 13,559 total
Exercise/Conversion
Stock Option (right to buy) 2001
2005-06-21$25.54/sh−10,000$255,400→ 0 total
Exercise: $23.36From: 2002-07-17Exp: 2011-07-16→ Common stock (10,000 underlying)
Exercise/Conversion
Common stock
2005-06-21$23.36/sh+10,000$233,600→ 23,559 total
Sale
Common stock
2005-06-21$25.54/sh−7,000$178,780→ 13,559 total
Sale
Common stock
2005-06-21$25.54/sh−4,000$102,160→ 13,559 total
Exercise/Conversion
Common stock
2005-06-21$23.06/sh+5,000$115,300→ 18,559 total
Exercise/Conversion
Common stock
2005-06-21$21.09/sh+4,000$84,360→ 17,559 total
Exercise/Conversion
Stock Option (right to buy) 1998
2005-06-21$25.54/sh−5,000$127,700→ 0 total
Exercise: $23.06From: 1999-07-21Exp: 2008-07-20→ Common stock (5,000 underlying)
Exercise/Conversion
Stock Option (right to buy) 2003
2005-06-21$25.54/sh−4,000$102,160→ 6,000 total
Exercise: $21.09From: 2004-07-15Exp: 2013-07-14→ Common stock (4,000 underlying)
Exercise/Conversion
Common stock
2005-06-21$21.74/sh+7,000$152,180→ 20,559 total

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