| 1 | OKB BRICK FIELD | Nadia | Tehatta | RANINAGAR,GOPINATHPUR |  | | | | |
| 2 | OLIVIA DEVELOPERS PVT.LTD(PROJECT NAME-ARIA RABINDRA) | South 24 Parganas | Baruipur | BADAMTALA NEAR LADIES PS BARUIPUR SOUTH 24 PGNS PIN-743610, | | | | | |
| 3 | OLIVIA ENLIGHTENED ENGLISH SCHOOL | Darjeeling | Siliguri | Bhimbhar, PO Madati | | | | | |
| 4 | OLIVIASS HOTEL | Purba Medinipur | Contai | OLD DIGHA, FOREST BUNGLOW ROAD | | | | | |
| 5 | OM CONSTRUCTION | Jalpaiguri | Jalpaiguri Sadar | Ukilpara | | | | | |
| 6 | OM EDUCATION | Kolkata | Kolkata | 59C, Chowringhee Road | | | | | |
| 7 | OMEGA DIAGONESTICS | Darjeeling | Siliguri | ASHUTOSH MUKERJEE ROAD,SACHIN-SAURAV APARTMENT COLLEGE PARA | | | | | |
| 8 | OMEGA RESORTS PVT. LTD. | Howrah | Uluberia | CHANDIPUR, P. O - KULGACHIA, ULUBERIA, HOWRAH | | | | | |
| 9 | OM FABRICATION | Howrah | Uluberia | Argori Roypara, Pin- 711302 Worksite : M/S- Skipper Ltd. Unit- Uluberia Madhabpur, Mahishrekha, Howrah | | | | | |
| 10 | OMKARA INFRAPROJECTS PVT LTD | Kolkata | Kolkata | 41A, A.J.C.BOSE RD, 2ND FLOOR,RM NO. 215,DIAMOND PRESTIGE BUILDING | | | | | |
| 11 | OMKARESHWAR PLYWOOD INDUSTRIES. | Jalpaiguri | Jalpaiguri Sadar | PO-Churabhander PS-Maynaguri | | | | | |
| 12 | OMKAR INFRAKON PVT. LTD. | Howrah | Uluberia | Vill + P.O.- Barunda, P.S. - Bagnan , Dist - Howrah, PIN - 711303 | | | | | |
| 13 | OMKAR RICE MILL MINI | Purba Medinipur | Contai | Kakhuria | | | | | |
| 14 | OM METAL INDUSTRIES | Darjeeling | | VILL. PRAKASH NAGAR, P.O. & P.S. PRADHAN NAGAR | | | | | |
| 15 | OMM MARBLE HOUSE | Howrah | Uluberia | Vill+P.O.- Mellok | | | | | |
| 16 | OM MOBILE COMMUNICATION | Darjeeling | Siliguri | Bidhannagar, Phansidewa, Darjeeling, 734426 | | | | | |
| 17 | OMM SHAKTI FABRICES | Hooghly | Chinsurah | BASIPUR BHASTARA | | | | | |
| 18 | OM SAI | Darjeeling | Darjeeling Sadar | NC GOENKA ROAD | | | | | |
| 19 | OM SAI ENTERPRISES | Paschim Medinipur | Kharagpur | AT ACE FEEDS PVT LTD,VIDYASAGAR INDUSTRIAL PARK,PLOT NO-K2,SECTOR-K,P.O-JAKPUR | | | | | |
| 20 | OM SHANTI RICE MILL | Purulia | Purulia Sadar(E) | Golkunda | | | | | |
| 21 | OM SHELLAC UDYOG | Purulia | Purulia Sadar(E) | Vivekananda Nagar | | | | | |
| 22 | OM SHIBAM | Purba Medinipur | Haldia | Mahisadal | | | | | |
| 23 | ONE97 COMMUNICATIONS LIMITED | North 24 Parganas | Bidhannagar | BP07, 6th Floor, Eco-Station | | | | | |
| 24 | ONE AUTO PVT. LTD. | South 24 Parganas | Alipore | DAKGHAR, BESIDE KALI MANDIR | | | | | |
| 25 | ONE AUTO PVT., LTD., | Kolkata | | 56, EAST TOPSIA RD.,P.O.-ARUPOTA, P.S.-PRAGATI MAIDAN, KOLKATA | | | | | |
| 26 | ONKARNATH RICE MILL PVT. LTD. | Purba Bardhaman | Bardhaman (North) | GANJA | | | | | |
| 27 | ONKAR PARIVAHAN FINANCE PVT LTD | Howrah | Howrah Sadar | VILL MADHYA JHOREHAT HOWRAH 711302 | | | | | |
| 28 | ONLINE DIGITAL SEVA KENDRA | Alipurduar | Alipurduar | VILL-MATHURA HAT KHOLA,PO-MATHURA BAGAN,DIST-ALIPURDUAR,PIN-736204 | | | | | |
| 29 | ONLY ALIBABA ( GUHAROY FOOD JOINT AND HOTEL PRIVATE LIMITED) | Kolkata | Kolkata | 5A Iswar Mondal Lane | | | | | |
| 30 | ONLY RETAIL PVT.LTD. | Kolkata | Kolkata | 1858/1,Rajdanga Main Road | | | | | |
| 31 | ONPROCESS TECHNOLOGY INDIA PRIVATE LIMITED | North 24 Parganas | Bidhannagar | INFINITY TOWER -I, 4TH FLOOR, PLOT - A3, BLOCK - GP, SECTOR - V, SALT LAKE CITY, | | | | | |
| 32 | OODLABARI COMPANY LTD. OODLABARI TEA ESTATE | Jalpaiguri | Mal Bazar | Manabari Jalpaiguri-735222 | | | | | |
| 33 | O/O THE CMOH , MALDA | Maldah | Malda Sadar | Jhaljhalia ,MALDA | | | | | |
| 34 | O/O THE EXECUTIVE ENGINEER, NADIA-I DIVISION, PHE DTE., GOVT. OF W. B. | Nadia | Kalyani | STORE( BHANDER), NEAR A-2 MARKET, KALYANI | | | | | |
| 35 | O/ O THE KALYANI MUNICIPALITY | Nadia | Kalyani | PO+ PS- KALYANI, NADIA | | | | | |
| 36 | OPPO MOBILE BANGLA PVT. LTD. | Nadia | Krishnanagar Sadar | Sagar More, Opp. Patra Bazar Petrol Pump, Krishnagar | | | | | |
| 37 | OPTICAL PALACE | North 24 Parganas | Barasat | 68/67 Jessore Road, Gr. Floor, Kamarthuba, Habra | | | | | |
| 38 | OPTICS SHOP | Birbhum | Suri Sadar | DUBRAJPUR ROAD,SURI | | | | | |
| 39 | OPTM HEALTH CARE PVT LTD | North 24 Parganas | Bidhannagar | DD3O, 6TH FLOOR SECTOR I SALT LAKE | | | | | |
