| Symbol | Name | Country | Exchange |
|---|---|---|---|
| CAT | Caterpillar, Inc. | US | NYSE |
| CMI | Cummins Inc. | US | NYSE |
| CYD | China Yuchai International Limited | US | NYSE |
| WPRT | Westport Innovations Inc | US | NASDAQ |
| OMTK | Omnitek Engineering Corp | US | OTC |
| CUMMINSIND | CUMMINS INDIA LTD. | IN | BSE |
| CAT1 | Caterpillar Inc | DE | F |
| CUM | Cummins Inc | DE | F |
| 092780 | Dongyang Piston Co Ltd | KR | KO |
| 000903 | Kunming Yunnei Power Co Ltd | CN | SHE |
| 600841 | Shanghai Diesel Engine Co Ltd A | CN | SHG |
| 900920 | Shanghai Diesel Engine Co Ltd B | CN | SHG |