| 3LOG Systems, Inc. | British Columbia |
| 3magine, Inc. | Ontario |
| 3merge, Inc. | Ontario |
| 3Mind Games | Quebec |
| 3Play Media Canada | |
| 3RCOM | Quebec |
| 3rd Planet Graphics | Nova Scotia |
| 3Sigma Consulting, Inc. | British Columbia |
| 3SYS Technologie | Quebec |
| 3Tara.com | Ontario |
| 3TEC | Ontario |
| 3thinker | Ontario |
| 3TM | |
| 3WAN, Inc. | British Columbia |
| 3ZCom | Quebec |
| 4 Office Automation Ltd | Ontario |
| 4 Summits Technologies, Inc. | |
| 401Games | Ontario |
| 403Tech | Alberta |
| 411 Computer Lifeline | Ontario |
| 411 Local Search Corporation | Ontario |
| 411 Ordinateur.com | Quebec |
| 416 Automation Ltd | Ontario |
| 44 North Digital Marketing | |
| 45 Drives Ltd | |
| 450TeL Communications, Inc. | Ontario |
| 460 Communications | British Columbia |
| 46and2 Design Studio | British Columbia |
| 48Hour Discovery | Alberta |
| 4AM Group Ltd | British Columbia |
| 4DM, Inc. | Ontario |
| 4effect Communications | Ontario |
| 4elements | |
| 4Front Capital Partners, Inc. | |
| 4GL Solutions | Ontario |
| 4GoodHosting.com | British Columbia |
| 4iiii Innovations, Inc. | Alberta |
| 4keyboard | Ontario |
| 4L Communications, Inc. | |
| 4M Enterprises, Inc. | Manitoba |
| 4PAY, Inc. | |
| 4pi Lab, Inc. | Alberta |
| 4Site | Ontario |
| 4th Utility, Inc. | British Columbia |
| 4th Wale Marketing | |
| 4WEB | Alberta |
| 4XEM | Ontario |
| 4XEM Canada | |
| 5 Corners Design | Saskatchewan |
| 5 Point Design | Ontario |