SELLING SHAREHOLDERS As indicated in the table below prior to the Offering the Selling Shareholders own or control directly or indirectly 24776536 Common Shares representing 100 of the issued and outstanding Common Shares The Selling Shareholders will sell or cause to be sold pursuant to the Secondary Offering an aggregate of 7494994 Common Shares representing 2322 of the outstanding Common Shares After giving effect to the Offering but without giving effect to the Over Allotment Option the Selling Shareholders will own or control directly or indirectly an aggregate of 17254876 Common Shares representing approximately 5345 of the outstanding Common Shares The following table describes the shareholdings of the Selling Shareholders prior to and after the Offering Before Giving Effect to the Offering A fter Giving Effect to the Offering of Common Shares Outstanding No of Common Assuming no Shares Sold No of Common exercise of Assuming no Shares R emaining OverAllotment exercise of Assuming no exercise Option OverAllotment of OverAllotment Assuming of OptionAssuming OptionAssuming Exercise in Indirect or No of Common Exercise in F ull of Exercise in F ull of F ull of Direct Common Shares OverAllotment OverAllotment OverAllotment Name Ownership Shares Outstanding Option Option Option 7 1684182 International 12 Direct 6804791 2746 28258053483809 39789863320982 12331013 1684182 Ontario 123 Direct 2586759 1044 10741951324327 15125641262432 469385 96052 Canada Inc 24 Indirect 1465964 592 608766750521 857198715443 266218 Monique Harvey 2 Indirect 488655 197 202922250173 285733238482 089073 Johann Duval 2 Indirect 651539 263 270563333565 380976317974 118097 Fiducie F amille Michel Mathieu 2 Indirect 393269 159 163312201340 229957191929 071059 P ascal Simard 2 Indirect 131090 053 5443767113 7665363977 024020 Gesco 25 Direct 12027933 4855 22574822783150 97704519244783 30272820 Daniel R o y 26 Direct 109870 044 2062125423 8924984447 028026 Sylvain L aroche 26 Indirect 40000 016 750719255 3249330745 010009 R obert Brouillette 26 Indirect 20000 008 37549628 1624615372 005005 R enaud Mercier 26 Indirect 15000 006 28157220 1218511530 004004 R aymond L eclerc 26 Indirect 15000 006 28157220 1218511530 004004 T otal 24749870 999 74949949262744 7 1725487615509626 53454731 Notes 1 1684181 Management is the general partner of 1684182 Ontario and 1684182 International and is owned by two private equity inves tors Signal Hill Equity P artners Inc and Ironbridge Equity P artners Limited 2 On April 4 2007 Sylvain L aroche acquired 40000 Common Shares R obert Brouillette acquired 20000 Common Shares R enaud Merci er acquired 15000 Common Shares and R aymond L eclerc acquired 15000 Common Shares each at a price of 100 per Common Share On April 16 2007 1681482 acquired 117611 Common Shares 1684182 International acquired 264939 Common Shares 96052 Canada Inc acquired 59714 Common Shares Monique Harvey acquired 19905 Common Shares Johann Duval acquired 26539 Common Shares Fiducie F amille Michel Mathieu acquired 16019 Common Shares P ascal Simard acquired 5340 Common Shares and Gesco acquired 489933 Common Shares as consideration for the acquisition of Drift based on a value of 100 per Common Share On May 31 2007 Daniel R oy acquired 109870 Common Shares in consideration for the acquisition of Soudure R oyale based on a value of 150 per Common S hare All other Common Shares were acquired on January 31 2007 pursuant to the amalgamation of Orbit Garant 3 1684182 Ontario has certain voting rights in respect of an additional 3233850 Common Shares owned of record by 96052 Cana da Inc Monique Harvey Johann Duval Fiducie F amille Michel Matheiu P ascal Simard Sylvain L aroche R obert Brouillette R enaud Mercie r R aymond L eclerc and Alain L aplante pursuant to a voting trust agreement that will be terminated on completion of this Offering 4 96052 Canada Inc is controlled by Michel Mathieu 5 Gesco is owned as to approximately 90 by P ierre Alexandre Eric Alexandre also owns approximately 5 of the shares in this company 63