WAYNE, Pa., Feb. 6, 2014 /PRNewswire/ -- Ryan & Maniskas, LLP is investigating potential claims against the board of directors of ATMI Inc. ("ATMI" or the "Company") (NASDAQ: ATMI) concerning possible breaches of fiduciary duty and other violations of law related to the Company's efforts to sell the Company to Entegris, Inc. in a transaction valued at approximately $1.15 billion.

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If you own shares of ATMI 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 (877) 316-3218 or to sign up online, visit: www.rmclasslaw.com/cases/atmi. You may also email Mr. Maniskas at rmaniskas@rmclasslaw.com.

Under the terms of the agreement, public shareholders of ATMI will receive $34.00 per share in cash for each share of ATMI they own.

Our investigation concerns possible breaches of fiduciary duty and other violations of state law by ATMI's Board of Directors for not acting in the Company's shareholders' best interests in connection with the sale process.

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. To learn more about the class action process, please visit: www.rmclasslaw.com.

CONTACT: Ryan & Maniskas, LLP
Richard A. Maniskas, Esquire
995 Old Eagle School Rd., Suite 311
Wayne, PA 19087
877-316-3218
www.rmclasslaw.com/cases/atmi
rmaniskas@rmclasslaw.com

SOURCE Ryan & Maniskas, LLP