============= Page 1 of 1 ============= 9y e, O Kenneth L Lay Chairman of the Board Enron Corp. P.O. Box 1188 Houston, TX 77251-1188 713-853-6773 Fax 713-853-5313 June 29, 2001 kenneth.lay@enron.com Rocky Emery Paine Webber, Inc. Private Client Group 109 N. Post Oak Lane, Suite 150 Houston, TX 77024 RE: Sale of 82,747 shares of Enron Corp. to Company for Repayment of $4,000,000 LOC plus accrued interest through June 28, 2001 Dear Rocky: This letter is your authority t ransfer 41,728 shares of Enron Corp. stock from the stock option award, Gran #3781, with an exercise date of 5/04/99 in Paine Webber Acct. HM-E01 33-ES to the Enron Corp. Omnibus Paine Webber Acct. HS-54630-EN by or before Friday, July 3, 2001. The remaining 41,019 shares will be delivered in certificate form directly to Enron Corp. Please call Sherrie Gibson at 713/630-0103 should you have any questions. 01 CC: Elaine Overturf Pam Butler Joanne Cortez Sherrie Gibson Sincerely, EC38648B0050191 Sa,7~~~48.3y XH063-00317 Endless possibilities." GOVERNMENT EXHIBIT 4099 Crim. No. H-04-25 (S-2)