Hydril Co Watch

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-Hydril Company Gamco Investors, Inc. 4/23/07 5,000 96.6982 Gamco Asset Management Inc. 5/01/07 2,000 96.8200 5/01/07 1,500 96.8007 5/01/07 700 96.8400 4/30/07 1,000 96.8200 4/27/07 3,000 96.8192 4/26/07 500 96.8530 4/25/07 3,000 96.6954 4/25/07 100- 96.7000 4/24/07 10,000 96.7200 4/24/07 8,000 96.7700 4/20/07 20,000 96.7000 4/20/07 12,000 96.6722 4/20/07 500 96.6500 4/19/07 2,500 96.6800 Gabelli Securities, Inc. Gabelli Associates Ltd 5/01/07 4,000 96.8038 4/27/07 2,500 96.7702 4/26/07 2,073 96.8530 4/24/07 3,000 96.7236 4/20/07 500 96.6500 4/19/07 2,000 96.6540 Gabelli Associates Fund II 5/01/07 500 96.8007 4/26/07 1,000 96.8530 Gabelli Associates Fund 5/01/07 5,000 96.8007 4/27/07 2,300 96.7702 4/26/07 1,000 96.8530 4/25/07 1,500 96.6800 4/24/07 2,500 96.7236 4/20/07 500 96.6500 4/19/07 3,000 96.6540 Gabelli Funds, LLC. Gabelli Utility Fund 4/30/07 20,000 96.8100 4/26/07 6,300 96.8500 4/25/07 13,700 96.8521 Gabelli Equity Income Fund 5/01/07 2,100 96.8100 4/30/07 17,900 96.8100 4/26/07 20,000 96.8700 the Gabelli Global Deal Fund 4/25/07 1,500 96.7200 4/20/07 100 96.6400 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NASDAQ Stock Market. (2) Price Excludes Commission

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-Hydril Company Gamco Asset Management Inc. 4/18/07 1,300 96.6900 4/18/07 3,000 96.6800 4/18/07 500 96.6519 4/18/07 2,000 96.6679 4/17/07 4,100 96.7076 4/17/07 1,000 96.6400 4/12/07 9,600 96.4057 Gabelli Securities, Inc. Gabelli Associates Ltd 4/18/07 4,000 96.6519 Gabelli Associates Fund II 4/18/07 500 96.6519 4/12/07 699- 96.4900 Gabelli Associates Fund 4/18/07 4,216 96.6519 Ggcp, Inc. 4/18/07 10,000 96.6800 Gabelli Funds, LLC. Gabelli Utility Fund 4/17/07 15,000 96.6500 Gabelli Dividend & Income Trust 4/11/07 4,000 96.2414 the Gabelli Global Deal Fund 4/18/07 7,700 96.6400 4/17/07 20,700 96.6400 4/16/07 20,000 96.6400 Gabelli Asset Fund 4/17/07 85,000 96.6499 Gabelli Abc Fund 4/17/07 40,000 96.6500 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NASDAQ Stock Market. (2) Price Excludes Commission

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-Hydril Company Gamco Investors, Inc. 3/29/07 5,000 96.1810 Gamco Asset Mangement Inc. 4/03/07 1,000- 96.2300 4/02/07 6,000 96.2142 3/29/07 4,000 96.1980 3/29/07 4,000- 96.1980 3/29/07 1,000- 96.2000 3/29/07 4,000 96.1980 3/29/07 11,500 96.1781 3/29/07 3,000 96.1741 3/27/07 17,000 96.1571 2/13/07 6,000- 95.0714 2/13/07 6,000 95.0715 Gabelli Associates Ltd 4/04/07 5,500 96.1151 4/03/07 1,500 96.1900 3/29/07 2,500 96.1267 Gabelli Associates Fund II 4/04/07 1,000 96.1151 4/03/07 500 96.1900 Gabelli Associates Fund 4/04/07 5,100 96.1151 4/03/07 1,000 96.1900 3/29/07 3,500 96.1267 Gabelli Funds, LLC. Gabelli Utility Fund 3/30/07 5,000 96.2000 Gabelli Dividend & Income Trust 4/05/07 79,900 96.2500 3/28/07 10,000 96.1621 3/27/07 30,000 96.1656 Gabelli Asset Fund 3/30/07 15,000 96.1949 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NASDAQ Stock Market. (2) Price Excludes Commission

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-Hydril Company Mario J. Gabelli 3/14/07 1,500 95.9446 3/20/07 2,000 96.1000 3/14/07 4,000 95.9446 Gabelli Foundation 3/14/07 1,500 95.9567 Gamco Asset Management Inc. 3/26/07 50,000 96.2460 3/26/07 10,000 96.2190 3/26/07 3,000 96.2052 3/26/07 5,500 96.1733 3/22/07 500 96.1300 3/22/07 5,000- 96.1200 3/21/07 2,000 96.0975 3/19/07 1,500 96.0900 3/16/07 18,190 96.0044 3/16/07 1,700 96.0100 3/15/07 50,000 96.0500 3/15/07 2,000 96.0500 3/15/07 5,810 96.0000 3/15/07 10,000 96.1400 3/14/07 5,000 95.9700 3/14/07 1,000 96.0200 Ggcp, Inc. 3/14/07 8,000 95.9992 Gabelli Funds, LLC. Gabelli Utility Fund 3/26/07 20,000 96.2056 3/14/07 20,000 95.9867 Gabelli Equity Trust 3/26/07 15,000 96.1900 Gabelli Dividend & Income Trust 3/19/07 5,200 96.1129 3/16/07 1,800 95.9600 the Gabelli Global Deal Fund 3/19/07 5,000 96.0798 3/16/07 5,000 96.0400 3/14/07 20,000 95.9738 (1) Unless Otherwise Indicated, All Transactions Were Effected on the NASDAQ Stock Market. (2) Price Excludes Commission

from S-1/A ~50 pages Form of Underwriting Agreement

from S-1/A ~50 pages Form of Underwriting Agreement