Santa Clara, Calif. -- October 22, 2001 -- Align Technology, Inc. (Nasdaq: ALGN) today announced that co-founder and President Kelsey Wirth will resign her position as President of the company at the end of November in order to pursue her interests in the areas of environmental protection and education where she had worked prior to founding Align.

Ms. Wirth will continue to serve the company through her position on Align Technology's Board of Directors and also as a consultant to the company.

Ms. Wirth co-founded Align Technology with Chief Executive Officer Zia Chishti in early 1997, and was instrumental in the Company's rapid growth and recent expansion into the general practice dentist market. "My five years at Align Technology have been the professional experience of a lifetime," said Wirth. "We have grown the company from a start-up to more than 1,100 employees and revolutionized the orthodontics industry in the process. It has truly been a privilege working with Zia and the team we have built, and I look forward to remaining intimately involved with the company going forward."

"Kelsey and I have worked together for the past five years," said Chishti. "She has contributed immeasurable value to the creation and building of Align. I speak for all of the Align employees in thanking her for contributions and wishing her good luck in her new endeavors."

About Align Technology, Inc.

Align Technology designs, manufactures and markets the Invisalign^® System, a proprietary new method for treating malocclusion, or the misalignment of teeth. The Invisalign System 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, the Invisalign System 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 the Invisalign System in 1998.

This release may contain forward-looking statements based on Align Technology's current expectations. These forward-looking statements involve risks and uncertainties. A number of important factors could cause actual results to differ materially from those in the forward-looking statements. These factors include Align Technology's ability to achieve profitability, the ability to control costs and continue to achieve efficiencies, the adoption by orthodontists, dentists, and consumers of the Invisalign System, Align Technology's successful enforcement of its intellectual property and avoidance of infringement on third party patents, Align Technology's ability to establish and maintain reliable, high-volume manufacturing capacity in the U.S. and internationally and Align Technology's ability to manage its significant growth and retain its key personnel. These factors, as well as other factors that could cause actual results to differ materially, are discussed in more detail in Align Technology's Annual Report on Form 10-K, as well as other reports and documents filed from time to time with the Securities and Exchange Commission.