| Kavlico Corp. | Moorpark, California, United States |
| KBI Commercial Ltd. | Dorking, Surrey, United Kingdom |
| Keithley Instruments Inc. | Cleveland, Ohio, United States |
| Kelvin Nanotechnology Ltd | Glasgow, Scotland, United Kingdom |
| Kemet International Ltd | Maidstone, Kent, United Kingdom |
| Kenneth J. Dalto & Associates | Farmington Hills, Michigan, United States |
| Keryx Biopharmaceuticals Inc. | New York, New York, United States |
| Keweenaw Nanoscience Center | Lake Jackson, Texas, United States |
| Key Safety Systems Inc. | Sterling Heights, Michigan, United States |
| Kidde Fire Systems | Ashland, Massachusetts, United States |