Southwest Gas Corp Watch

from 8-K 42 pages Southwest Gas Corporation $300,000,000 5.450% Senior Notes Due 2028 Underwriting Agreement

from 8-K 42 pages Southwest Gas Corporation $300,000,000 5.800% Senior Notes Due December 1, 2027 Underwriting Agreement

from 8-K 37 pages Southwest Gas Corporation $600,000,000 4.05% Senior Notes Due 2032 Underwriting Agreement

from 8-K 34 pages Southwest Gas Corporation $300,000,000 3.18% Senior Notes Due 2051 Underwriting Agreement

from 8-K 34 pages Southwest Gas Corporation $450,000,000 2.200% Senior Notes Due 2030 Underwriting Agreement

from 8-K 34 pages Southwest Gas Corporation $300,000,000 4.150% Senior Notes Due 2049 Underwriting Agreement

from 8-K 32 pages Southwest Gas Corporation $300,000,000 3.70% Senior Notes Due 2028 Underwriting Agreement

from 8-K 33 pages Southwest Gas Corporation $300,000,000 3.80% Senior Notes Due 2046 Underwriting Agreement

from S-3ASR 37 pages Sales Agency Agreement

from 8-K 39 pages Southwest Gas Corporation $250,000,000 4.875% Senior Notes Due 2043 Underwriting Agreement

from 8-K 40 pages Southwest Gas Corporation $250,000,000 3.875% Senior Notes Due 2022 Underwriting Agreement

from 8-K 32 pages Southwest Gas Corporation $125,000,000 4.45% Senior Notes Due 2020 Underwriting Agreement

from SC 13D/A 1 page Underwriting agreement

from SC 13D/A 1 page Schedule II Information With Respect to Transactions Effected During the Past Sixty Days or Since the Most Recent Filing on Schedule 13d (1) Shares Purchased Average Date Sold(-) Price(2) Common Stock-Southwest Gas Corp Gabelli Foundation 7/20/06 1,000- 32.5800 6/30/06 1,000- 31.3100 6/28/06 1,000- 30.1300 Gamco Asset Management Inc. 8/02/06 400- 33.2300 8/02/06 6,000- 33.3300 8/01/06 2,500- 32.9216 7/28/06 2,600- 33.2300 7/28/06 900- 33.0178 7/27/06 800- 33.3950 7/26/06 3,500- 32.9817 7/25/06 602- 33.3899 7/25/06 600- 33.1533 7/24/06 10,000- 33.1560 7/24/06 250- 33.0600 7/21/06 400- 32.3500 7/20/06 15,000- 32.3899 7/19/06 300- 32.0400 7/18/06 1,000- 31.9400 7/14/06 200- 31.5900 7/13/06 1,800- 31.6728 7/12/06 8,100- 31.9198 7/10/06 500- 31.2600 7/10/06 200- 31.5900 7/07/06 4,250- 31.9164 7/06/06 1,500- 31.9073 7/05/06 6,000- 31.6212 7/05/06 6,000- 31.7517 7/05/06 10,850- 31.8250 7/03/06 1,100- 31.4509 7/03/06 3,500- 31.3200 6/30/06 3,300- 31.3400 6/30/06 800- 31.0638 6/30/06 1,500- 31.1473 6/29/06 2,500- 30.8480 6/29/06 784- 31.2185 6/29/06 3,500- 30.8600 6/29/06 1,000- 31.2000 6/28/06 3,900- 30.3730 6/28/06 5,000- 30.4600 6/27/06 1,000- 30.0750 6/27/06 1,000- 29.9540 6/26/06 2,000- 29.0800 6/23/06 500- 29.0000 6/21/06 4,400- 29.2200 6/19/06 600- 29.2200 6/14/06 1,000- 28.2940 6/13/06 3,500- 28.9734 6/09/06 800- 29.4000 6/07/06 1,000- 28.9140 6/06/06 500- 28.8300 6/06/06 1,200- 28.8375 6/06/06 500- 28.8740 6/02/06 2,500- 29.4952 Gabelli Funds, LLC. Gabelli Value Fund 7/11/06 5,000- 32.0500 Gabelli Utility Fund 6/23/06 2,000- 29.1000 Gabelli Dividend & Income Trust 7/27/06 2,000- 33.4400 7/26/06 10,000- 33.3404 Gabelli Asset Fund 6/27/06 5,000- 29.8216 Gabelli Capital Asset Fund 7/25/06 7,000- 33.3020 7/05/06 8,000- 31.6875 6/30/06 2,000- 31.3355 6/29/06 3,000- 30.7750 6/28/06 5,000- 30.4500 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NYSE. (2) Price Excludes Commission

from 8-K 24 pages Sales Agency Financing Agreement

from SC 13D/A 1 page Schedule II Information With Respect to Transactions Effected During the Past Sixty Days or Since the Most Recent Filing on Schedule 13d (1) Shares Purchased Average Date Sold(-) Price(2) Common Stock-Southwest Gas Corp. Gamco Investors, Inc. 11/23/04 6,000- 25.2433 11/23/04 600- 25.2200 11/22/04 3,000- 25.2200 11/19/04 200- 24.7900 11/18/04 100,000- *Do 11/17/04 5,000- 25.1500 11/17/04 500- 25.1100 11/16/04 500- 25.0600 11/15/04 500- 25.2600 11/12/04 500 25.0000 11/10/04 500 24.9100 11/09/04 2,200- 25.1391 11/05/04 5,000- 25.6020 11/03/04 20,500- 25.0230 11/02/04 7,100- 24.8600 11/01/04 900- 24.9200 10/28/04 2,000- 24.4635 10/28/04 2,000- 24.4150 10/28/04 700- 24.5000 10/27/04 10,000- 24.5372 10/26/04 8,000- 24.0613 10/21/04 54,700- 23.8227 10/20/04 18,900- 23.7087 10/19/04 6,637- 23.7095 10/19/04 7,900 23.7310 10/19/04 6,637 23.7095 10/19/04 13,274- 23.7095 10/19/04 6,637 23.7095 10/15/04 1,000- 23.6420 10/11/04 3,600 23.8200 10/08/04 22,100 23.8591 10/08/04 1,000- 23.8600 10/07/04 1,000- 24.0090 10/06/04 9,500- 23.9427 10/04/04 3,200- 24.0672 10/04/04 1,000- *Do 10/01/04 6,800- 24.1163 9/30/04 2,000- 23.9500 9/29/04 200- 23.6600 9/28/04 2,000- 23.3015 9/28/04 700 23.4157 9/24/04 500- 23.4000 Gabelli Funds, LLC. Gabelli Value Fund 11/05/04 15,000- 25.6567 10/06/04 9,000- 24.0000 Gabelli Dividend & Income Trust 10/21/04 4,300 23.6709 10/20/04 10,500 23.6785 10/19/04 31,200 23.6937 10/18/04 10,000 23.5899 9/27/04 5,000 23.3052 Gabelli Abc Fund 10/04/04 1,500- 24.1000 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NYSE. (2) Price Excludes Commission. (*) Results in Change of Dispositive Power and Beneficial Ownership

from U-3A-2 1 page Underwriting agreement

from 8-K 29 pages Sales Agency Financing Agreement

from SC 13D/A 1 page Schedule II Information With Respect to Transactions Effected During the Past Sixty Days or Since the Most Recent Filing on Schedule 13d (1) Shares Purchased Average Date Sold(-) Price(2) Common Stock-Southwest Gas Corp Gamco Investors, Inc. 4/07/04 5,000- 23.8270 4/05/04 500 23.4900 4/01/04 1,800 23.5911 3/29/04 5,000- 23.1780 3/19/04 2,000- *Do 3/18/04 3,800 23.4566 3/15/04 500 23.3900 3/11/04 1,000- *Do 3/10/04 500- 23.4540 3/09/04 400- 23.3800 3/08/04 1,000- 23.3730 3/02/04 500- 23.3400 2/17/04 500 23.8000 Gabelli Funds, LLC. Gabelli Capital Asset Fund 4/01/04 1,600 23.6094 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NYSE. (2) Price Excludes Commission. (*) Results in Change of Dispositive Power and Beneficial Ownership

from SC 13D/A 1 page Schedule II Information With Respect to Transactions Effected During the Past Sixty Days or Since the Most Recent Filing on Schedule 13d (1) Shares Purchased Average Date Sold(-) Price(2) Common Stock-Southwest Gas Corp Gamco Investors, Inc. 2/13/04 4,000- 23.6305 2/13/04 700- 23.5900 2/12/04 1,000 23.6500 2/11/04 3,000- 23.8493 2/05/04 500 23.1480 2/04/04 500 23.2400 2/02/04 300- 23.3900 1/30/04 500 23.4140 1/29/04 500 23.5700 1/28/04 4,000 23.8400 1/27/04 2,000 *DI 1/26/04 2,000 *DI 1/26/04 1,000 23.7280 1/23/04 4,000 23.5500 1/22/04 400 23.5200 1/21/04 4,500 23.4889 1/20/04 300- 23.5100 1/16/04 500- 23.4960 1/16/04 800 23.5200 1/14/04 600 23.1000 1/14/04 300- 23.1000 1/13/04 1,800 22.9550 1/12/04 1,500- 22.7813 1/09/04 600 22.9883 1/09/04 1,000 22.8800 1/07/04 200 22.6600 1/06/04 2,000 22.8300 1/02/04 2,000 22.7400 12/31/03 4,668- *Do 12/29/03 1,500- *Do 12/29/03 500- *Do 12/26/03 2,200- 22.8686 12/19/03 700 22.4500 12/18/03 500 22.4580 12/17/03 500 22.2200 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NYSE. (2) Price Excludes Commission. (*) Results in Change of Dispositive Power and Beneficial Ownership