• Orion Pharma
• +358-10-4291
• Other Regions

• OriPlatform
• 65-96753079
• Singapore

• Orisil Ltd.
• +38-032-297-12-19
• Other Regions

• Orison Chemicals Limited
• +86-22-59886076;+86-22-59833239
• China

• Orison Marketing
• (325) 692-1135
• United States

• Orissa Mining Corporation
• 91-674-2394578
• India

• Oritental Silica Co.,Ltd.
• 66-2-6652903
• Thailand

• Orjet Intermediates Pvt. Ltd.
• 91-79-25898922
• India

• ORLANDI IMPIANTI S.P.A.
• +39 02 96476.1
• Italy

• Oromtech
• 82-2- 543-9399
• South Korea

• Oronite (Chevron)
• United Kingdom

• Orpegen Peptide Chemicals
• 4962217267711
• Germany

• Orpegen Pharma
• +49 6221 9105-0
• Germany

• Ortec, Inc
• 864-859-1471
• United States

• Ortho-McNeil Pharmaceutical, Inc.
• 1-800-682-6532
• United States

• Ortin Laboratories Limited
• 91-040-27567266
• India

• Osaka Asahi Chemical Co., Ltd.
• 81-869-57-2051
• Japan

• Osaka Paint(Jiangying)Co.,Ltd.
• +86-510-86321359,86320807
• China

• Osaki Industry Co., Ltd.
• 81-72-272-1453
• Japan

• Osam Speciality Chemicals Pvt. Ltd
• 91-2522-327 240
• India