X0202 4/A 2006-06-20 2006-06-28 1 0001069308 Opexa Therapeutics, Inc. OPXA 0001352851 Magnetar Financial LLC 1603 ORRINGTON AVE. 13TH FLOOR EVANSTON IL 60201 0 0 1 0 0001353085 Magnetar Capital Partners LP 1603 ORRINGTON AVE. 13TH FLOOR EVANSTON IL 60201 0 0 1 0 0001368026 Supernova Management LLC 1603 ORRINGTON AVENUE, 13TH FLOOR EVANSTON IL 60201 0 0 1 0 0001368027 Litowitz Alec N C/O MAGNETAR FINANCIAL LLC 1603 ORRINGTON AVENUE, 13TH FLOOR EVANSTON IL 60201 0 0 1 0 Common Stock 2006-06-20 4 P 0 500 9.5 A 672685 I See Footnote Common Stock 2006-06-20 4 P 0 70 9.5 A 672755 I See Footnote Common Stock 2006-06-20 4 P 0 60 9.5 A 672815 I See Footnote Common Stock 2006-06-26 4 S 0 2000 8.5 D 670815 I See Footnote Common Stock 2006-06-26 4 S 0 2500 7.55 D 668315 I See Footnote These shares of the Issuer's common stock, $.05 par value per share ("Shares"), are held for the account of Magnetar Capital Master Fund, Ltd., a Cayman Islands exempted company ("Magnetar Capital Master Fund"). Magnetar Financial LLC, a Delaware limited liability company ("Magnetar Financial"), serves as the Investment Adviser of the Magnetar Capital Master Fund. Magnetar Capital Partners LP, a Delaware limited partnership ("Magnetar Capital Partners"), serves as the sole member and parent holding company of Magnetar Financial. Magnetar Financial is a registered investment adviser under Section 203 of the Investment Advisers Act of 1940, as amended. In such capacity, Magnetar Financial exercises voting and investment power over the Shares held for the account of Magnetar Capital Master Fund. Supernova Management LLC, a Delaware limited liability company ("Supernova"), is the general partner of Magnetar Capital Partners. The manager of Supernova is Mr. Alec N. Litowitz. By: /s/ Alec N. Litowitz, as Manager of Supernova Management LLC, as General Partner of Magnetar Capital Partners LP, as Sole Member of Magnetar Financial LLC 2006-06-29 By: /s/ Alec N. Litowitz, as Manager of Supernova Management LLC, as General Partner of Magnetar Capital Partners LP 2006-06-29 By: /s/ Alec N. Litowitz, as Manager of Supernova Management LLC 2006-06-29 /s/ Alec N. Litowitz 2006-06-29