Stock Trading History of Maffie Michael O

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Maffie Michael O since year 2005. The trader's CIK number is 1030281. At the time of this reporting, Maffie Michael O is the Director of Southwest Gas Corp (stock ticker symbol SWX).

Stock purchases, sales, and option exercises reported by *Maffie Michael O* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-09-25	SWX	Southwest Gas Corp	Sale	3,500	29.00	101,500
2006-11-09	SWX	Southwest Gas Corp	Option Exercise	55,000	26.15	1,438,250
2006-11-09	SWX	Southwest Gas Corp	Sale	55,000	36.96	2,033,075
2006-11-08	SWX	Southwest Gas Corp	Option Exercise	60,000	22.50	1,350,199
2006-11-08	SWX	Southwest Gas Corp	Sale	60,000	36.97	2,218,000
2006-06-08	SWX	Southwest Gas Corp	Sale	7,100	29.25	207,675
2006-06-08	SWX	Southwest Gas Corp	Option Exercise	7,100	21.74	154,354
2006-06-07	SWX	Southwest Gas Corp	Sale	2,400	29.25	70,200
2006-06-07	SWX	Southwest Gas Corp	Option Exercise	2,400	21.74	52,175
2006-06-05	SWX	Southwest Gas Corp	Sale	100	29.53	2,953
2006-06-05	SWX	Southwest Gas Corp	Option Exercise	100	21.74	2,174
2006-05-09	SWX	Southwest Gas Corp	Sale	5,100	29.12	148,537
2006-05-09	SWX	Southwest Gas Corp	Option Exercise	5,100	21.74	110,873
2006-05-10	SWX	Southwest Gas Corp	Sale	20,300	29.11	590,882
2006-05-10	SWX	Southwest Gas Corp	Option Exercise	20,300	21.74	441,321
2006-05-08	SWX	Southwest Gas Corp	Sale	15,000	29.18	437,625
2006-05-08	SWX	Southwest Gas Corp	Option Exercise	15,000	21.74	326,100
2006-03-30	SWX	Southwest Gas Corp	Sale	20,000	28.32	566,500
2006-03-30	SWX	Southwest Gas Corp	Option Exercise	20,000	21.09	421,800
2006-03-29	SWX	Southwest Gas Corp	Option Exercise	15,000	21.09	316,350
2006-03-29	SWX	Southwest Gas Corp	Sale	15,000	28.35	425,250
2005-06-07	SWX	Southwest Gas Corp	Sale	25,000	25.22	630,625
2005-03-17	SWX	Southwest Gas Corp	Sale	7,200	25.08	180,540
2005-03-16	SWX	Southwest Gas Corp	Sale	8,373	25.19	210,915

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Maffie Michael O (Director of Southwest Gas Corp at the time of this reporting) see the Securities and Exchange Commission (SEC) website.