• Voluntarily Withdraws Its Listing on NYSE Arca, Inc., Formerly the Pacific Stock Exchange
• Retains New York Stock Exchange Listing

CLEVELAND, Dec. 21 /PRNewswire-FirstCall/ -- Lamson & Sessions (NYSE: LMS) announced today that it plans to voluntarily withdraw the listing of its securities from NYSE Arca, Inc., formerly the Pacific Stock Exchange. The Company's stock will continue to be listed on the New York Stock Exchange.This action has been taken to eliminate duplicative administrative requirements inherent with maintaining dual listings on both exchanges and to reduce costs. In connection with the recent merger of NYSE with Archipelago Holdings, NYSE now owns the NYSE Arca marketplace.

Lamson & Sessions is a leading producer of thermoplastic enclosures, fittings, wiring outlet boxes and conduit for the electrical, telecommunications, consumer, power and wastewater markets. For additional information, please visit our Web site at: http://www.lamson-sessions.com.