Ryan & Maniskas, LLP Announces Investigation of American Dental Partners, Inc.

Ryan & Maniskas, LLP (www.rmclasslaw.com/cases/adpi) is investigating potential claims against the board of directors of American Dental Partners, Inc. ("American Dental Partners" or the "Company") (NASDAQ: ADPI) concerning possible breaches of fiduciary duty and other violations of law related to the Company’s efforts to sell American Dental Partners to funds affiliated with JLL Partners, Inc. in a transaction valued at $398 million.

Our investigation concerns possible breaches of fiduciary duty and other violations of law related to the approval of the transaction by Company’s board of directors; in particular, whether the Company undertook a fair process to obtain fair consideration for all shareholders of American Dental Partners. For more information regarding our investigation, please contact Ryan & Maniskas, LLP (Richard A. Maniskas, Esquire) toll-free at [phone] or by email at [e-mail] or visit: www.rmclasslaw.com/cases/adpi.

Under the terms of the definitive agreement, American Dental Partners shareholders will receive $19.00 in cash for each share of American Dental Partners common stock they own.

If you own shares of American Dental Partners and would like to learn more about these claims or if you wish to discuss these matters and have any questions concerning this announcement or your rights, contact Richard A. Maniskas, Esquire toll-free at [phone] or to sign up online, visit: www.rmclasslaw.com/cases/adpi. You may also email Mr. Maniskas at [e-mail]. For more information about class action cases in general, please visit our website: www.rmclasslaw.com.

Ryan & Maniskas, LLP is a national shareholder litigation firm. Ryan & Maniskas, LLP is devoted to protecting the interests of individual and institutional investors in shareholder actions in state and federal courts nationwide.