X0306 4 2015-09-03 1 0001422862 PMFG, Inc. PMFG 0001248804 MCCASHIN ROBERT 14651 NORTH DALLAS PARKWAY DALLAS TX 75254 1 0 0 0 Common Stock 2015-09-03 4 D 0 45635 D 0 D The shares were cancelled upon consummation of Issuer's merger with and into a wholly-owned subsidiary of CECO Environmental Corp. ("CECO"). Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated as of May 3, 2015, among Issuer, CECO, Top Gear Acquisition Inc., and Top Gear Acquisition II LLC, each issued and outstanding share of the Issuer's common stock was cancelled and converted into the right to receive either (a) 0.6456 shares of CECO common stock, plus cash (without interest) in lieu of any fraction share of CECO common stock that would otherwise be issued or (b) $6.85 in cash, without interest, for each share of Issuer common stock, depending on the consideration election made by the reporting person and subject to the proration procedures set forth in the Merger Agreement. /s/ Ronald L. McCrummen as attorney-in-fact 2015-09-03