| ROCKWELL COLLINS | Montréal | Aerospace |
| Rolls-Royce Canada Ltée | Lachine | Aerospace, Tout Entreprises et services |
| RTI-CLARO INC. | Laval | Aerospace |
| S.F. TECH PRECISION INC. | Lachenaie | Aerospace |
| SABLAGE AU JET 2000 INC. | Boisbriand | Aerospace |
| SAFEWORK INC. (divisition de Dassault Systems) | Montréal | Aerospace |
| Safran Helicopter Engines Canada Inc. | Bristol | Aerospace |
| SAFRAN MESSIER-BUGATTI-DOWTY | Mirabel | Aerospace |
| SAFRAN TURBOMECA CANADA | Mirabel | Aerospace |
| SARGENT AÉROSPATIALE CANADA INC. | Anjou | Aerospace |
| SATORI AIR SERVICES INC. (filiale de TEAM S.A.) | Montréal | Aerospace |
| SATYAM A REVERIFIER | Montréal | Aerospace |
| SCDS PRO INC. | Montréal | Aerospace |
| SERDIM (CORPORATION DE TECHNOLOGIES) | Montréal | Aerospace |
| SERMATECH CANADA INC. | Dorval | Aerospace |
| SERMATI CANADA INC. | Montréal | Aerospace |
| SERVICES AIRBASE INC. | Montréal | Aerospace |
| Shellcast Foundries inc. | Montréal | Aerospace, Tout Entreprises et services |
| SICOTTE LTÉE | Montréal | Aerospace |
| SIDER-TECH 2003 INC. | Boucherville | Aerospace |
| SIMGRAPH INC. | Laval | Aerospace |
| SINTERS CANADA INC CANADIAN. | Boucherville | Aerospace |
| SITA | Centre-Ville | Aerospace, Tout Entreprises et services |
| SKYSERVICE | Dorval | Aerospace |
| SOCIÉTÉ D'OUTILLAGE M.R. LTÉE | Montréal | Aerospace |
| Société en commandite Airbus Canada | Montréal | Aerospace |
| SONACA MONTRÉAL | Mirabel | Aerospace |
| SPG DATA 3D (Division de SPG Hydro International Inc.) | Sainte-Julie | Aerospace |
| STANDARD AERO | Lachine | Aerospace |
| Stelia Aéronautique Canada | Henry-Giffard | Aerospace |
| SYSTÈMES ACCESSAIR INC. (LES) | Sainte-Catherine | Aerospace |
| TECHNI AIR 2000 INC. | Dorval | Aerospace |
| TECHNIMÉCA INTERNATIONAL LTÉE | Montréal | Aerospace |
| TECHNIPRODEC LTÉE | Montréal | Aerospace |
| TECNAR AUTOMATION LTÉE | Saint-Bruno | Aerospace |
| TECNICKROME INC. | Montréal | Aerospace |
| Teco Précision Inc. | Montréal | Aerospace, Tout Entreprises et services |
| TESTON INC. (USINAGE DE PRÉCISION) | Montréal | Aerospace |
| Thales Canada Avionique | Montréal | Aerospace |
| THALES CANADA INC. (DIVISION AÉRONAUTIQUE) | Montréal | Aerospace |
| THERMETCO (LES TREMPEURS) LTÉE | Montréal | Aerospace |
| TKX AEROSPACE (Thyssen Krupp Materials NA) | Saint-Anne-De-Bellevue | Aerospace |
| TOP ACES CONSULTING | Pointe-Claire | Aerospace |
| TQF TECHNOLOGIES INC. | Montréal | Aerospace |
| TRIBOSPEC (acquis par le Groupe TOTAL en 2007) | La Salle | Aerospace |
| TRIDENT INDUSTRIES INC. | Montréal | Aerospace |
| UGS | Pointe-Claire | Aerospace |
| ULTRASPEC INC. | Montréal | Aerospace |
| UNISOURCE TECHNOLOGY | Montréal | Aerospace |
| VAC-AÉRO INTERNATIONAL INC. | Montréal | Aerospace |
