| 8251754 Canada Inc. CA-E-8GPK-3BAP | Federal corporation | Active | Gatineau | $2.2B |
| AFL Canada Inc. CA-E-EDWD-AXDJ | Federal corporation | Active | Gatineau | $2.0B |
| Les Traducteurs Réunis S.c.c. CA-E-ZJ8V-HHWC | Federal corporation | Active | GATINEAU | $1.2B |
| E D Brunet Et Associes Canada INC. CA-E-NJEY-ZEZH | Federal corporation | Active | GATINEAU | $871.4M |
| 3056058 Canada INC. CA-E-3QNY-E9XF | Federal corporation | Active | Gatineau | $790.6M |
| 10084182 Canada Inc. CA-E-XE0N-ZWW3 | Federal corporation | Active | Gatineau | $718.9M |
| 7543352 Canada Inc. CA-E-CEJG-PBZW | Federal corporation | Active | Gatineau | $519.6M |
| Samson & Associés Cpa/consultation INC. CA-E-8FTR-RQBS | Federal corporation | Active | GATINEAU | $487.2M |
| 3305724 Canada INC. CA-E-E2P1-A5XV | Federal corporation | Active | GATINEAU | $318.8M |
| Confluence Architecture INC. CA-E-MNVB-WNTS | Federal corporation | Active | Gatineau | $241.2M |
| Portes Interprovincial J.b.m. INC. CA-E-TSYC-H0XS | Federal corporation | Active | GATINEAU | $236.1M |
| 3354709 Canada INC. CA-E-BV9S-KVER | Federal corporation | Active | Gatineau | $231.7M |
| Congruence Coach INC. CA-E-PK8Q-VXF7 | Federal corporation | Active | Gatineau | $214.0M |
| Versatil Bpi INC. CA-E-Q9TQ-9H3X | Federal corporation | Active | Gatineau | $208.6M |
| Traductions Houle INC. CA-E-WW39-GMA5 | Federal corporation | Active | Gatineau | $201.9M |
| Kaboom Communication Design INC. CA-E-YA8C-5YC0 | Federal corporation | Active | Gatineau | $147.7M |
| Tango - Solutions Rh INC. CA-E-D066-TRCJ | Federal corporation | Active | Gatineau | $144.4M |
| The Native Women's Association of Canada CA-E-YRTZ-YYKX | Federal not-for-profit corporation | Active | Gatineau | $130.0M |
| Pci Geomatics Enterprises INC. CA-E-2NAZ-BPP8 | Federal corporation | Active | GATINEAU | $122.3M |
| Oproma INC. CA-E-9HVN-5VS2 | Federal corporation | Active | GATINEAU | $122.0M |
| Séguin Morris INC. CA-E-577V-7CQE | Federal corporation | Active | GATINEAU | $110.9M |
| Exelradio INC. CA-E-EW56-1N0J | Federal corporation | Active | Gatineau | $107.1M |
| 8639442 Canada Inc. CA-E-SWVZ-BEGE | Federal corporation | Active | Gatineau | $90.7M |
| Cogniva Information Solutions Inc. CA-E-ABZY-X0VQ | Federal corporation | Active | Gatineau | $87.0M |
| Exact Legal Translations INC. CA-E-TVEP-B372 | Federal corporation | Active | GATINEAU | $83.1M |
| 8607524 Canada Inc. CA-E-KW6M-HH0E | Federal corporation | Active | Gatineau | $78.9M |
| 7130988 Canada INC. CA-E-8F5W-A2GN | Federal corporation | Active | gatineau | $77.4M |
| 8108625 Canada INC. CA-E-KZA9-XA25 | Federal corporation | Active | Gatineau | $76.5M |
| Brent Moore & Associates Inc. CA-E-2A5R-PKQ6 | Federal corporation | Dissolved | GATINEAU | $76.0M |
| 4220820 Canada Inc. CA-E-XFJE-EYS1 | Federal corporation | Active | GATINEAU | $73.0M |
| 174946 Canada INC. CA-E-KGDC-DTC1 | Federal corporation | Active | Gatineau | $72.6M |
| 7143516 Canada INC. CA-E-0SJM-3B79 | Federal corporation | Active | Gatineau | $69.7M |
| 8196311 Canada INC. CA-E-NPXN-7B7E | Federal corporation | Active | GATINEAU | $67.6M |
| Morin Isolation & Toitures Ltee CA-E-9KSD-WGGJ | Federal corporation | Active | Gatineau | $58.5M |
| Qualnet Wireless Services, Inc. CA-E-HDJX-MSA1 | Federal corporation | Active | Gatineau | $53.8M |
| Y2 Consulting Psychologists Inc. CA-E-S033-BNVC | Federal corporation | Active | GATINEAU | $43.4M |
| Construction Profex inc. CA-E-JNZ8-7FP6 | Federal corporation | Active | Gatineau | $38.3M |
| 15119120 Canada INC. CA-E-90DM-G88N | Federal corporation | Active | Gatineau | $34.1M |
| CubeWerx Inc. CA-E-ZM4H-SE7W | Federal corporation | Active | Gatineau | $32.7M |
| Students ON Ice Foundation CA-E-FK16-EAAF | Registered charity | Active | GATINEAU | $24.1M |
| Universite Du Quebec En Outaouais CA-E-WQF4-74B7 | Registered charity | Former | GATINEAU | $18.3M |
| Vallée-Jeunesse (1997) inc. CA-E-WGMB-XEVD | Registered charity | Current | GATINEAU | $12.8M |
| Norconex INC. CA-E-SK1C-P4HE | Federal corporation | Active | Gatineau | $5.7M |
| Daxel INC. CA-E-HBC4-9VMH | Federal corporation | Active | Gatineau | $2.0M |
| La Relance Outaouais INC. CA-E-01GJ-4J0T | Registered charity | Active | GATINEAU | $484K |
| SOPAR-Bala Vikasa CA-E-BYAX-RN51 | Registered charity | Active | Gatineau | $88K |
| Centre Islamique de l'Outaouais CA-E-77AA-5KGW | Registered charity | Active | Gatineau | $87K |
| Debre Zihon St. Mary Ethiopian Orthodox Church INC. CA-E-9DX5-S5QS | Registered charity | Active | GATINEAU | $81K |
| Les entreprises communautaires d’insertion à l’emploi de l’Outaouais inc. CA-E-D3GV-1C09 | Registered charity | Active | GATINEAU | $65K |
| Musée d'Aylmer inc. CA-E-8CH0-P6BS | Registered charity | Active | Gatineau | $62K |
| Vintage Wings Of Canada CA-E-SM8W-597D | Registered charity | Active | GATINEAU | $50K |