Companies catalogue
- O' South, Tseung Kwan O
- O'Farm Ltd, Fanling
- O'Farm 綠盈坊有機店 (將軍澳連理街店), Tseung Kwan O
- O'Farm 綠盈坊有機店 (杏花村分店), Pak Sha Wan
- O22Y SKATE SHOP, Lai Chi Kok
- OCBC Wing Hang Bank - Aberdeen Branch, Aberdeen
- OCBC Wing Hang Credit, Kwai Chung
- OCBC Wing Hang Credit, Kwai Fong
- OCBC Wing Hang Credit, Yau Ma Tei
- OCBC Wing Hang Credit, Causeway Bay
- OH GOODS, 大嶼山大澳
- OK便利店, Ma On Shan
- OK便利店, 粉嶺
- OK便利店, 粉嶺
- OK便利店, Tai Wai
- OK便利店NO.175, Sau Mau Ping
- OM Spa, Chek Lap Kok
- ON Semiconductor Hong Kong Limited, Pak Shek Kok
- ONCE, Kwai Fong
- ONE BEACON HILL, Kowloon Tong
- ONE Quick Trim House 單剪屋 (特設兒童剪髮區), Ngau Chi Wan
- ONE2FREE_LOK Fu, Wang Tau Hom
- OOCL Logistic (Hong Kong) Ltd, Kwun Tong
- OP Hub Solutions Limited, 尖沙咀
- OSHC OSH Academy, Tsing Yi
- OVO Flagship Store, Wan Chai
- OWNMAY, Sheung Wan
- Oasis Beauty School, Causeway Bay
- Oasis Café, 元朗
- Ocean Empire, Lai Chi Kok
- Ocean Empire Congee, Tseung Kwan O
- Ocean Spa, Central
- Ocean Theatre Souvenir Shop, Ocean Park
- Ocean Treasure Seafood Restaurant, Shek Yam
- Odeon Taiwanese Cafe, Sha Tin
- Office Of Legislative Councillor - Chung-Tai Cheng, Yuen Long
- Office of Academic Links, Sha Tin
- Office of the Privacy Commisioner for Personal Data, Hong Kong, Wan Chai
- OfficeCleanz, Causeway Bay
- Offshore Tax Consultancy Hong Kong, Central
- Ogawa Health Care International (HK) Ltd, Tin Shui Wai
- Oi Kwan Fast Food Restaurant, Choi Hung Estate
- Oishi House, Mid-level
- Okashi Land, Hang Hau
- Oliver Jewellery Company 愛麗華珠寶金行, Mei Foo Sun Chuen
- Oliver's Super Sandwiches, Pak Sha Wan
- Oliver's Super Sandwiches, Kornhill
- Olympian City 1, Tai Kok Tsui
- Olympian City 2, Mong Kok
- Olympus CS Center, Mong Kok
- Olé Olé Olé, Tung Chung
- On Board Apparel Limited, Wong Chuk Hang
- On Lok Restaurant, Tuen Mun
- On Yuen Street Garden, Ma On Shan
- On-Net Service Technology, 尖沙咀
- On-Street Motorcycle Parking Spaces, Stanley
- On-Street Motorcycle Parking Spaces, Kwun Tong
- On-Street Motorcycle Parking Spaces, Kwun Tong
- On-Street Motorcycle Parking Spaces, So Kon Po
- On-Street Motorcycle Parking Spaces, Tiu Keng Wan
- On-Street Motorcycle Parking Spaces, Sai Wan
- On-Street Motorcycle Parking Spaces, Sheung Wan
- On-Street Motorcycle Parking Spaces, Tsing Yi
- On-Street Motorcycle Parking Spaces, Tsing Yi
- On-Street Motorcycle Parking Spaces, Tsuen Wan
- On-Street Motorcycle Parking Spaces, Sai Wan
- On-Street Motorcycle Parking Spaces, Kwai Chung
- On-Street Motorcycle Parking Spaces, Tai Po Kau
- On-Street Motorcycle Parking Spaces, Ma On Shan
- On-Street Motorcycle Parking Spaces, Tai Po Kau
- On-Street Motorcycle Parking Spaces, Fanling
- OnSign TV, Central
- One Earth Designs - Hong Kong, Science Park
- One Stop, Wan Chai
- One Stop Food Supply Company, Quarry Bay
- One Workshop, Kwun Tong
- Onitsuka Tiger, Causeway Bay
- Online Company Register Hong Kong, Sheung Wan
- Ooh My Dog 寵物屋, 慈雲山
- Oppa Yoli, Tuen Mun
- Optical 88, 東涌
- Optical 88, Kowloon Tong
- Optima Capital Limited, Central
- Orchid Cafe, Pak Shek Kok
- Organic Beauty, Ma On Shan
- Orient Exchange Company (HK) Limited, Tsim Sha Tsui
- Oriental Kingdom Restaurant, Tuen Mun
- Original Taste Workshop, Central
- Original Taste Workshop, Mai Po
- Outward Bound Hong Kong, Sai Kung
- Oversea-Chinese Banking Corporation Ltd., Central
- Owen Motors Services Ltd., Tuen Mun
- Owl Photo Studio 貓頭鷹照相館, professional Portrait, 一站式韓式證件相影樓,CV相,ID CV passport Team photo, Central
- Oxford Path Centre, Yau Ma Tei
- Oysho, Causeway Bay
- Oysho, Kowloon Tong
- Oyster Bar, Chek Lap Kok
- Oyster More 元朗蠔魔, Yuen Long
- Ozzie Cozzie Co, Central
- ocean海洋牌抽油煙機, Tai Wai