EXHIBIT 4Voting Agreement and Irrevocable Proxy • May 17th, 2001 • PBG Acquisition Corp • Oil & gas field services, nec
1 EXHIBIT 4 VOTING AGREEMENT AND IRREVOCABLE PROXY WHEREAS, pursuant to an Agreement and Plan of Merger (the "Merger Agreement") dated of even date herewith among ICO, Inc., a Texas corporation ("ICO"), ICO Acquisition, Inc., a Texas corporation and...Voting Agreement and Irrevocable Proxy • January 31st, 2001 • Pacholder Associates Inc