SANTA CLARA, Calif., Oct 19, 2005 /PRNewswire-FirstCall via COMTEX/ -- Align Technology, Inc. (Nasdaq: ALGN), the inventor of Invisalign(R), a proprietary method of straightening teeth without wires and brackets, announced today that it ranked Number Ninety-Four on the 2005 Deloitte Technology Fast 500, a ranking of the 500 fastest growing technology companies in North America. Rankings are based on percentage revenue growth over five years, from 2000 to 2004. Align Technology grew 2,464 percent during this period.

In addition to ranking on the Deloitte Technology Fast 500, Align also ranked Number Thirteen on the Silicon Valley Technology Fast 50, which is a ranking of the 50 fastest growing technology firms in Silicon Valley.

Align Technology, Inc. President and CEO Thomas M. Prescott credits the Company's product development progress and practice development and clinical education programs for customers with the Company's revenue growth over the past five years. "Our continued growth reflects our commitment to providing our customers with an excellent product and valuable programs to help make Invisalign a significant part of their practice," said Prescott.

"Making the Deloitte Technology Fast 500 is a testament to a company's commitment to technology," Tony Kern, deputy national managing principal of Deloitte's Technology, Media & Telecommunications industry practice. "With its 2,464 percent growth rate over five years, Align has proven that its leadership has the vision and determination to grow in difficult times."

The 500 list is compiled from Deloitte's 15 regional North American Fast 50 programs, nominations submitted directly to the Fast 500, and public company database research. To qualify for the Fast 500, entrants must have had 2000 operating revenues of at least $50,000 USD or $75,000 CD for the United States and Canada, respectively, and 2004 operating revenues of at least $1 million USD or CD.

Entrants must be headquartered in North America and must be a "technology company," defined as a company that owns proprietary technology that contributes to a significant portion of the company's operating revenues, or devotes a significant proportion of revenues to the research and development of technology. Using other companies' technology in a unique way does not qualify.

About Align Technology, Inc.

Align Technology designs, manufactures and markets Invisalign, a proprietary method for treating malocclusion, or the misalignment of teeth. Invisalign corrects malocclusion using a series of clear, nearly invisible, removable appliances that gently move teeth to a desired final position. Because it does not rely on the use of metal or ceramic brackets and wires, Invisalign significantly reduces the aesthetic and other limitations associated with braces. Invisalign is appropriate for treating adults and older teens. Align Technology was founded in March 1997 and received FDA clearance to market Invisalign in 1998.

To learn more about Invisalign or to find a certified Invisalign doctor in your area, please visit www.invisalign.com or call 1-800-INVISIBLE.

About Deloitte

Deloitte refers to one or more of Deloitte Touche Tohmatsu, a Swiss Verein, its member firms and their respective subsidiaries and affiliates. As a Swiss Verein (association), neither Deloitte Touche Tohmatsu nor any of its member firms has any liability for each other's acts or omissions. Each of the member firms is a separate and independent legal entity operating under the names "Deloitte," "Deloitte & Touche," or "Deloitte Touche Tohmatsu" or other related names. Services are provided by the member firms or their subsidiaries or affiliates and not by the Deloitte Touche Tohmatsu Verein.

Deloitte & Touche USA LLP is the US member firm of Deloitte Touche Tohmatsu. In the US, services are provided by the subsidiaries of Deloitte & Touche USA LLP (Deloitte & Touche LLP, Deloitte Consulting LLP, Deloitte Financial Advisory Services LLP, Deloitte Tax LLP and their subsidiaries) and not by Deloitte & Touche USA LLP.

Investor Relations Contact                 Press Contact
     Barbara Domingo                            Shannon Mangum Henderson
     Align Technology, Inc.                     Ethos Communication, Inc.
     (408) 470-1000                             (678) 417-1767
     investorinfo@aligntech.com                 shannon@ethoscommunication.com

SOURCE Align Technology, Inc.

Investor Relations: Barbara Domingo of Align Technology, Inc., +1-408-470-1000 or
investorinfo@aligntech.com; or Press: Shannon Mangum Henderson of Ethos
Communication, Inc., +1-678-417-1767 or shannon@ethoscommunication.com, for Align
Technology, Inc.

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