| Ньюсмейкеры | Публикации |
|---|
| Olympus | 5 |
| OmegaBalance | 1 |
| Omelchenko gallery | 1 |
| Omni Consulting Group | 1 |
| Omnicom School of Languages | 1 |
| Omnicomm | 71 |
| Omninet | 4 |
| OmniWay | 3 |
| ONCRM.RU | 1 |
| OnDoc | 8 |
| One Agile | 2 |
| One! International School | 24 |
| OneBox | 1 |
| OneFit | 1 |
| OneTrack | 2 |
| Onetrak | 3 |
| Onetto | 1 |
| Oneway Biomed | 1 |
| Onko-apteka.kz | 2 |
| Online System Group | 4 |
| Online Taxi | 1 |
| Online Имидж-студия №1 | 1 |
| Online-Pokers.ru | 1 |
| Online-Service | 1 |
| Onlinetours | 3 |
| Online-журнал Equine Management | 1 |
| ONSI | 1 |
| OnTVtime | 1 |
| Onyx Robotics | 1 |
| ONКлимат СТК Групп | 1 |
| Oofsite | 1 |
| Oomyhop | 1 |
| OOOPay | 8 |
| Open Kitchen | 1 |
| Open Staff | 2 |
| Open Village | 5 |
| Open2Europe | 3 |
| openclass | 1 |
| OpenLink | 3 |
| OpenStack | 2 |
| OpenText | 2 |
| OptiCore Tech | 1 |
| OPTICS-EXPO | 1 |
| Optiland | 113 |
| Optima Development | 4 |
| Optima Lex | 1 |
| OptimConsult | 2 |
| Optimization | 1 |
| Optimizone.ru | 1 |
| OPTIMUS Corporation | 11 |
| Optimus Group | 1 |
| Oracle | 16 |
| Orange Brain Producing | 1 |
| Orange Business Services | 37 |
| Orange Gifts | 5 |
| Orange Life Solutions | 2 |
| Orchild | 1 |
| Orckit-Corrigent | 1 |
| Ordo Group | 16 |
| Oregon Scientific | 41 |
| Organic People | 1 |
| Organic Vodka Group | 1 |
| Oriens Group | 1 |
| Orient Expo | 1 |
| Oriental Expo | 2 |
| Oriflame | 32 |
| Origin Capital | 10 |
| Original Marines | 1 |
| ORIS | 16 |
| ORMAN | 4 |
| Orrick | 1 |
| Orso Bianco | 3 |
| Orta Agency | 1 |
| Orteastore | 1 |
| OSCompany | 1 |
| Osdart | 1 |
| OSRAM | 8 |
| Osteohondroz24 | 1 |
| Osteria della Piazza Bianca | 1 |
| O'Stin | 9 |
| Ostis finance group | 1 |
| Ostrovok.ru | 1 |
| Oteple | 1 |
| Otto Stelle | 1 |
| Otto Zimmermann GmbH | 1 |
| ourmind | 1 |
| Outdoor Media | 2 |
| OutletGifts | 1 |
| Outsourcing Trade | 1 |
| Ovago | 7 |