425 1 0001.txt FORM 425 Filed by Amerada Hess Corporation Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14d-2(b) of the Securities Exchange Act of 1934 Subject Company: LASMO plc Commission File No.: 333-50258 A. [Slide Presentation by Amerada Hess Corporation] On December 13, 2000 Amerada Hess Corporation changed its Slide Presentation previously filed on November 6, 2000. Slide 4 and Slide 5 changed and the new text is as follows: [Slide 4] Summary of LASMO Acquisition o Amerada Hess has offered to purchase all outstanding shares of LASMO for(pound)2.4 Billion ($3.5 Billion) - Unanimously recommended by Board of LASMO - Offer price of(pound)1.80 is comprised of approximately 69% (approximately(pound)1.25) cash and 31% AHC equity - Fixed exchange ratio of 78.7 LASMO shares for 1 AHC share, with remainder in cash - Assumption of approximately(pound)1.1 Billion ($1.6 Billion) of LASMO gross debt o Loan note alternative offered o Amerada Hess has received irrevocable commitments from shareholders holding over 20% of LASMO shares o First closing date is January 12, 2001 [Slide 5] Share Price Performance since Offer Announcement Amerada Hess - Amerada Hess- Turnover by Volume (m) Share Price (US$) Nov 6 3.2592 60.38 Nov 7 1.6142 61.38 Nov 8 1.00091 60.88 Nov 9 1.3727 60.75 Nov 10 0.9495 61.19 Nov 13 1.5345 61.56 Nov 14 1.7317 61.94 Nov 15 0.8269 62.81 Nov 16 1.040 62.94 Nov 17 0.4056 62.19 Nov 20 0.968 61.94 Nov 21 0.7543 62.81 Nov 22 0.5045 63.25 Nov 23 n/a 63.25 Nov 24 0.6129 62.81 Nov 27 1.092 64.44 Nov 28 0.5642 63.25 Nov 29 1.3396 62.06 Nov 30 0.979 61.25 Dec 1 1.6042 61.81 LASMO- LASMO- Turnover by Volume (m) Share Price (pence) Nov 6 148.5882 175 Nov 7 153.0828 174 Nov 8 55.0116 174 Nov 9 28.1084 173.5 Nov 10 30.5483 173.75 Nov 13 19.7126 174.5 Nov 14 30.597 175 Nov 15 43.7705 177 Nov 16 13.6839 177.75 Nov 17 8.7111 176.25 Nov 20 4.4424 176.25 Nov 21 5.1458 177 Nov 22 6.1816 177.5 Nov 23 14.7895 176.25 Nov 24 22.3444 177.25 Nov 27 8.8069 177.25 Nov 28 9.530 178 Nov 29 17.7683 177 Nov 30 6.2609 175.25 Dec 1 28.7452 175.25