 | Laughing Buddha Games | Clayton, california, united states | 1 | entertainment | 2014 | |
 | Flourishing Learners | clayton, california, united states | 2 | higher education | 2021 | |
 | Clayton Historical Society | Clayton, california, united states | - | museums and institutions | 1974 | |
 | compensation connection | clayton, california, united states | 2 | human resources services | 2007 | |
 | Hvac Cad Services | Clayton, california, united states | 2 | construction | - | |
| Clayton Fitness Ctr | Clayton, california, united states | - | information technology and services | - | |
| GR Garon Corp. | Clayton, california, united states | - | - | - | |
 | zmedia | clayton, california, united states | - | marketing and advertising | 2003 | |
 | absolute technologies, inc. | clayton, california, united states | - | computer software | 1997 | |
| loss prevention academy | clayton, california, united states | - | security and investigations | 2010 | |
| university veterinary hospital | clayton, california, united states | - | veterinary | - | |
| painting by ken | clayton, california, united states | - | construction | - | |
| down to earth grading | clayton, california, united states | - | construction | - | |
| ciii insurance services | clayton, california, united states | - | insurance | - | |
| corinthian grand ballroom | clayton, california, united states | - | public relations and communications | - | |
| world traveler news | clayton, california, united states | - | publishing | 1990 | |
| westcliff associates | clayton, california, united states | - | information technology and services | - | |
| fancy feet fitness | clayton, california, united states | - | health, wellness and fitness | - | |
| kelzyme research & development llc | clayton, california, united states | - | mining and metals | 2013 | |
| jiloa improvement partners | clayton, california, united states | - | management consulting | 2006 | |
