X0306 4 2015-08-10 0 0000003197 CECO ENVIRONMENTAL CORP CECE 0000946590 ICARUS INVESTMENT CORP 2300 YONGE STREET, SUITE 1710 TORONTO A6 M4P 1E4 ONTARIO, CANADA 0 0 1 0 0000946589 DEZWIREK JASON 2300 YONGE STREET, SUITE 1710 TORONTO A6 M4P 1E4 ONTARIO, CANADA 1 0 1 0 Common Stock 2015-08-10 4 P 0 35170 8.95 A 2609906 D Common Stock 2015-08-10 4 P 0 35170 8.95 A 2609906 I By Icarus Investment Corp. Price reflects a weighted average price for multiple transactions that ranged from $8.65 to $9.31 per share. The Reporting Person undertakes to provide, upon request by the Commission Staff, the Issuer or a security holder of the Issuer, full information regarding the number of shares sold at each separate price. These shares are owned directly by Icarus Investment Corp. ("Icarus") These shares are owned directly by Icarus, and indirectly by Jason DeZwirek, the Chairman of the Board and a Director and 10% or greater owner of the Issuer. Jason DeZwirek is deemed to control Icarus because he has sole voting and dispositive power of the shares of common stock of the Issuer owned directly by Icarus. /s/ Jason DeZwirek, on behalf of himself and as President of Icarus Investment Corp. 2015-08-10