SAN FRANCISCO, Dec. 29 /PRNewswire-FirstCall/ -- The Pacific Exchange, Inc. ("PCX") announced that at the opening of business on Thursday, December 29, 2005, it will commence trading options on the following equity securities: Allegheny Energy, Inc. (PCX:AYE); Ariba, Inc. (PCX:ARBA); Aqua America, Inc. (PCX:WTR); Carrizo Oil & Gas, Inc. (PCX:CRZO); Discovery Laboratories, Inc. (PCX:DSCO); Epix Pharmaceuticals, Inc. (PCX:EPIX); Orckit Communications Ltd. (PCX:ORCT); Pharmacyclics, Inc. (PCX:PCYC); Sigma Designs, Inc. (PCX:SIGM); Tan Range Exploration Corp. (PCX:TRE); Vintage Petroleum, Inc. (PCX:VPI). Allegheny Energy options will trade on the January expiration cycle with exercise limits set at 25,000,000 shares. The issue will be traded by lead market maker Kurt Eckert of Wolverine Trading, LLC. Ariba options will trade on the February expiration cycle with exercise limits set at 25,000,000 shares. The issue will be traded by lead market maker Kurt Eckert of Wolverine Trading, LLC. Aqua America options will trade on the March expiration cycle with exercise limits set at 7,500,000 shares. The issue will be traded by lead market maker Kurt Eckert of Wolverine Trading, LLC. Carrizo Oil & Gas options will trade on the January expiration cycle with exercise limits set at 7,500,000 shares. The issue will be traded by lead market makers Joshua Reider and Marcus Nilssen of Citadel Derivatives Group, LLC. Discovery Laboratories options will trade on the March expiration cycle with exercise limits set at 7,500,000 shares. The issue will be traded by lead market maker Kurt Eckert of Wolverine Trading, LLC. Epix Pharmaceuticals options will trade on the February expiration cycle with exercise limits set at 7,500,000 shares. The issue will be traded by lead market maker Kurt Eckert of Wolverine Trading, LLC. Orckit Communications options will trade on the March expiration cycle with exercise limits set at 5,000,000 shares. The issue will be traded by lead market makers Joshua Reider and Marcus Nilssen of Citadel Derivatives Group, LLC. Pharmacyclics options will trade on the February expiration cycle with exercise limits set at 7,500,000 shares. The issue will be traded by lead market maker Kurt Eckert of Wolverine Trading, LLC. Sigma Designs options will trade on the January expiration cycle with exercise limits set at 7,500,000 shares. The issue will be traded by lead market makers Joshua Reider and Marcus Nilssen of Citadel Derivatives Group, LLC. Tan Range Exploration options will trade on the January expiration cycle with exercise limits set at 7,500,000 shares. The issue will be traded by lead market makers Steven D. Juno and Ethan Dorr of Cutler Group, LP. Vintage Petroleum options will trade on the February expiration cycle with exercise limits set at 25,000,000 shares. The issue will be traded by lead market makers Steven D. Juno and Ethan Dorr of Cutler Group, LP. Forward-Looking Statements Certain statements in this press release may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on Archipelago's current expectations and involve risks and uncertainties that could cause Archipelago's actual results to differ materially from those set forth in the statements. There can be no assurance that such expectations will prove to be correct. Factors that could cause Archipelago's results to differ materially from current expectations include: general economic and business conditions, industry trends, competitive conditions, regulatory developments as well as other risks or factors identified in the Company's filings with the Securities Exchange Commission, including its Report on Form 10-K for the fiscal year ending December 31, 2004 which is available on the Company's website at http://www.archipelago.com/. You should not place undue reliance on forward- looking statements, which speak only as of the date of this press release. Except for any obligation to disclose material information under the Federal securities laws, Archipelago undertakes no obligation to release publicly any revisions to any forward-looking statements to reflect events or circumstances after the date of this press release. For more information contact Todd Swearingen, (312) 442-7747. DATASOURCE: Archipelago CONTACT: Todd Swearingen of Archipelago, +1-312-442-7747, or Web site: http://www.archipelago.com/

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