Companies catalogue
- O-Net Communications (Group) Ltd., Sheung Wan
- OCBC Wing Hang Bank, Central
- OCBC Wing Hang Credit, Sai Wan
- OFX (formerly ClearFX), Sydney
- OGAWA, Tuen Mun
- OK便利店, Tung Chung
- OK便利店, Aberdeen
- OM Custom Tailors Best Hong Kong Tailor, Tsim Sha Tsui
- OMA, Central
- OMG Fitness, Tsim Sha Tsui
- OMICRON electronics Asia Limited, Hung Hom
- OMS Asia, Wan Chai
- ON Dining Kitchen & Lounge, Central
- OPPA Chicken, Shek Tong Tsui
- OPUS Medical Diagnostic Centre, Yau Ma Tei
- ORIGIN MARKETING LIMITED 源澤市務有限公司, Kwai Chung
- ORIGIN gin bar, Central
- OT&P ADMINISTRATION & ACCOUNTS, Wan Chai
- OT&P Central Medical Clinic, Central
- OT&P Discovery Bay Medical Clinic, Discovery Bay Lantau Island
- OT&P Woman and Child Clinic, Central
- OTROTango Dance Studio, Tsim Sha Tsui
- OTS OPTIMAL TRAINING SUPPLEMENT (TM), Tuen Mun
- OYA Body Shaping Clinics, 中環
- Oasis, Clear Water Bay
- Oasis Beauty School (SUS), Causeway Bay
- Oasis Dance Centre, Wan Chai
- Oba (Asia) Co. Ltd 澳寶(亞洲)有限公司, 新界荃灣沙咀道29-35號科技中心號1902室
- Oberflex Asia, Wan Chai
- Obolensky Asia HK Ltd, Tsim Sha Tsui
- Ocean Park Road Community Garden, Wong Chuk Hang
- Ocean WiFi Hotel 海洋酒店, Mong Kok
- Octopus Terminal, Central
- Offshore Company Corporation, Sheung Wan
- Ogilvy & Mather Marketing Communications Ltd, Central
- Oh Market 美國零食店, Tuen Mun
- Ohel Leah Synagogue, Mid-level
- Ohms Cafe & Bar, Hong Kong
- Oi Kwan Road Baptist Church, Wan Chai
- Olea, Tung Chung
- Olive, Greek & Middle Eastern, Central
- Ollies Cafe & Restaurant, Sai Ying Pun
- Omni Electrical (HK) Co., Ltd.歐麗電業, Kwai Chung
- Omron, Causeway Bay
- Omtis Business Centre, Admiralty
- On Board Boardgame 樂聚桌遊屋, Cheung Sha Wan
- On Kee, Shek Tong Tsui
- On Kee Dry Seafood Co. Ltd. - Sheung Wan, Sheung Wan
- On On Electrical & Metals Co., Tuen Mun
- On Ting/Yau Oi Community Centre, Tuen Mun
- One 2 Crack Roastery, Central
- One Port Limited, Kwai Chung
- One Terminal, Tuen Mun
- One96, Central
- OneStart Business Centre, Mong Kok
- Ones To Watch Dance Company, Tsim Sha Tsui
- Ooosh For Startups Lai Chi Kok, Cheung Sha Wan
- Opalart & Craft Centre Ltd, Hung Hom
- Opendoor Cafe + Courtyard, Sai Ying Pun
- Operations Division Non-Building & Engineering Construction Office - New Territories West - 2, Tuen Mun
- Optical 88, Wan Chai
- Optima Juris Hong Kong, Irvine
- Optimal Family Health, Central
- Options Studio Pilates, Central
- Opus Grill, Central
- Oracle Clinic Hong Kong, Tsim Sha Tsui
- Orchid Communications, Central
- Organic Plus, Happy Valley
- Oriental Health Chinese Medicine Clinic, Central
- Oriental Wealth Technology Ltd, Cheung Sha Wan
- OrientalTouch Ltd., Quarry Bay
- Origami Kids Cafe, Hong Kong
- Origins, Tsuen Wan
- Oris Lounge, Central
- OroPro Specialist Dental Clinic, Yau Ma Tei
- Orthodox Metropolitanate of Hong Kong and South East Asia, Central District
- Otaki (HK) Ltd, Tsat Tsz Mui
- Otto Lounge, Central
- Ottotto 一合, Tai Ping Shan
- Our Lady Queen of Peace Chapel, Peng Chau
- Our Lady Seat of Wisdom Chapel, Sai Wan
- Our Lady of China Church, Tai Kok Tsui
- Our Lady of Fatima Church, Cheung Chau
- Our Lady of Lourdes Catholic Kindergarten, Lamma Island
- Our Lady of Lourdes Chapel, Lamma Island
- Our Lady of Lourdes Church, Pok Fu Lam
- Our Lady of Mount Carmel Church, Wan Chai
- Our Lady of the Rosary Church 聖母玫瑰堂, Sai Wan
- Outdoor, Causeway Bay
- Outdoor Basketball Courts, Tung Chung
- Outdoor Furnitures and Beach Umbrella, 屯門
- Overseas Employment Centre Ltd海外僱傭中心 -Central中環, Hong Kong
- Ovo Cafe, Hong Kong
- Ovolo Central, Central
- Ovolo Noho, Central
- Owago Limited, Kwai Chung
- Oysters Bar & Restaurant, Central
- Oz Impex Limited, 尖沙咀
- Ozone Bar, West Kowloon
- one-to-one English with The English Teacher, Yau Ma Tei