| 1 | Lightning Power Electric Industry Inc. | | USA |
| 2 | Turbonetics Inc. | | USA |
| 3 | Southwest Products Corp. | | USA |
| 4 | Endyn Ltd. | | USA |
| 5 | Tri Star Engines & Transmissions | | USA |
| 6 | Echogen Power Systems LLC | | USA |
| 7 | Pittsburgh Electric Engines Incorporated | | USA |
| 8 | Industrial Diesel Products Inc. | | USA |
| 9 | Joseph Industries Inc. | | USA |
| 10 | Pratt & Whitney Canada Corp. | | USA |
| 11 | Isuzu Motors America Inc. | | USA |
| 12 | Solar Turbines Incorporated | | USA |
| 13 | Bell Power Inc. | | USA |
| 14 | Hydrogen Engine Center Inc. | | USA |
| 15 | Power Phase LLC | | USA |
| 16 | Tucker Valve Seat Co. | | USA |
| 17 | Ampaire | | USA |
| 18 | Standard Aero Holdings Inc | | USA |
| 19 | AB Engine | | USA |
| 20 | Memphis Diesel Power | | USA |
| 21 | Natural Gas Vehicles International | | USA |
| 22 | Crow Mfg. Inc. | | USA |
| 23 | BOSTIC MOTORS INC. | | USA |
| 24 | INNOTECH ENGINE INC. | | USA |
| 25 | Kubota Engine America Corporation | | USA |
| 26 | Pinnacle Engines Inc. | | USA |
| 27 | Navistar Inc. | | USA |
| 28 | BERGEN RC HELICOPTERS INC | | USA |
| 29 | Liberal Gasket MFG. Co. | | USA |
| 30 | Origin Engines | | USA |
| 31 | RPM Industries LLC | | USA |
| 32 | Scania U.S.A. Inc. | | USA |
| 33 | Authentic Scale | | USA |
| 34 | Evapar | | USA |
| 35 | Farymann North America | | USA |
| 36 | Knoxville Locomotive Works | | USA |
| 37 | Kem Equipment Inc. | | USA |
| 38 | Hatz Diesel of America Inc. | | USA |
| 39 | Turbomeca USA | | USA |
| 40 | Waukesha-Pearce Industries Inc. | | USA |
| 41 | Component Machine Inc. | | USA |
| 42 | Eastern Ship Buildings | | USA |
| 43 | Buck's Engine Co. | | USA |
| 44 | Reliable Engine Services Ltd. | | USA |
| 45 | Coates International | | USA |
| 46 | Astro Automotive Machine | | USA |
| 47 | Generator Source (formerly Diesel Service & Supply) | | USA |
| 48 | Republic Locomotive | | USA |
| 49 | SAE Manufacturing Specialties Corp | | USA |
| 50 | Hema Driveline and Hydraulics Inc. | | USA |
| 51 | Exline Inc. | | USA |
| 52 | Ford Motor Co. | | USA |
| 53 | Technical Directions / Kratos Defense | | USA |
| 54 | C&I Power Solutions | | USA |
| 55 | Caterpillar Inc. | | USA |
| 56 | Fairbanks Morse Engine | | USA |
| 57 | Smarter Alloys | | USA |
| 58 | Deere & Company | | USA |
| 59 | Mast Motorsports | | USA |
| 60 | Kawasaki Motors Corp. U.S.A. | | USA |
| 61 | Hyundai Heavy Industries Co. Ltd. | | USA |
| 62 | CFM International | | USA |
| 63 | Wajax Limited | | USA |
| 64 | AGCO Corp. | | USA |
| 65 | Separation Design Group | | USA |
| 66 | Western Power Products Inc. | | USA |
| 67 | A/M Air Starter Sales & Service | | USA |
| 68 | Honda Engines Group | | USA |
| 69 | Fairbanks Morse Defense | | USA |
| 70 | American Honda Motor Co. Inc. | | USA |
| 71 | Holt CAT Irving | | USA |
