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Companies starting with O
2,53,599 profiles.
- Onspark UK LimitedActive, Information technology consultancy activities, Derby, United Kingdom
- Onspec Daq Pty LtdActive, Newstead, Australia
- Onspec Legend Information Systems Private LimitedActive, Telangana, since 1989
- Onspec Lifestyle Solutions Private Limit EdStruck off, Tamil Nadu, since 2005
- Onspec Ontic LimitedActive, Other service activities n.e.c., Maidstone, United Kingdom
- Onspec Optical Company LimitedActive, Other retail sale of new goods in specialised stores (not commercial art galleries and opticians), Newcastle Upo
- Onspec Resources Pty LtdActive, Cranbourne, Australia
- Onspec Semiconductors India Private LimitedActive, Tamil Nadu, since 2025
- Onspec Software LtdActive, Business and domestic software development, Southampton, United Kingdom
- Onspec Solutions LtdActive, Other activities of employment placement agencies, Leicester, United Kingdom
- Onspec Technology Partners India Private LimitedActive, Tamil Nadu, since 2004
- Onspec Technology Solutions Private LimitedActive, Tamil Nadu, since 2004
- Onspec-Legend Information Systems Private LimitedActive, Tamil Nadu, since 1999
- Onspeedwell Services LtdActive, Construction of other civil engineering projects n.e.c., Leighton Buzzard, United Kingdom
- Onsphere Tech LLPActive, Rajasthan, since 2025
- Onsphere Traders LLPActive, since 2026
- Onspire GmbHInactive, München, Germany
- Onspire Media LimitedActive, Retail sale via mail order houses or via Internet, Luton, United Kingdom
- Onspire Skills LLPActive, Kerala
- Onsplash LimitedActive, Other business support service activities n.e.c., Newbury, United Kingdom
- Onsplek & Company LtdActive, Public houses and bars, South Molton, United Kingdom
- Onspon Services Private LimitedActive, Uttar Pradesh, since 2013
- Onsport LimitedActive (proposal to strike off), Other information technology service activities, London, United Kingdom
- Onsport Pty LimitedInactive, Sydney, Australia
- Onsport Services LimitedActive (proposal to strike off), Other information technology service activities, London, United Kingdom
- Onspot Care LtdActive, Temporary employment agency activities, Ipswich, United Kingdom
- Onspot Fuel Private LimitedActive, Haryana, since 2021
- Onspot Industries Private LimitedActive, Gujarat, since 2023
- Onspot Innovations Private LimitedActive, Madhya Pradesh, since 2021
- Onspot LtdActive (proposal to strike off), Bookkeeping activities, Greenhithe London, United Kingdom
- Onspot Management Services Private LimitedActive, Delhi, since 2011
- Onspot Plumbing & Heating LtdActive, Plumbing, heat and air-conditioning installation, Worthing, United Kingdom
- Onspot Policy Insurance Web Aggregatorprivate LimitedStruck off, Uttar Pradesh, since 2019
- Onspot Shopping Bazaar Private LimitedActive, Delhi, since 2016
- Onspot Solutions Private LimitedActive, Maharashtra, since 2007
- Onspot Survey and Marketing Private LimitedStruck off, Delhi, since 2011
- Onspot Surveys LtdActive, Other business support service activities n.e.c., Newton Abbot, United Kingdom
- Onspot Telecom Consultants Private LimitedStruck off, Delhi, since 2013
- Onspothealth Private LimitedActive, Rajasthan, since 2025
- onsproject B.V.Active, Enschede, Kingdom of the Netherlands
- Onsra Yoga Ashram & Ayurveda Private LimitedActive, Goa, since 2026
- Onsrud Invest AsActive, Gjøvik, Norway
- Onss LtdActive, Non-specialised wholesale trade, London, United Kingdom
- Onss Property Company LimitedActive, Other letting and operating of own or leased real estate, London, United Kingdom
- Onssa Camper Van LtdActive, Manufacture of bodies (coachwork) for motor vehicles (except caravans), Scunthorpe, United Kingdom
- Onssd Food and Beverages Private LimitedActive, Telangana, since 2023
- Onssss Hi-Tech Solutions (OPC) Private LimitedActive, Haryana, since 2022
- Onstad Gruppen AsActive, Fredrikstad, Norway
- Onstad Invest ASActive, Fredrikstad, Norway
- Onstaff LtdActive, Other activities of employment placement agencies, Wokingham, United Kingdom
- Onstaffing Recruitment LtdActive (proposal to strike off), Temporary employment agency activities, Romford, United Kingdom
- Onstage Accounts LtdActive, Accounting and auditing activities, Carterton, United Kingdom
- Onstage Designs Private LimitedActive, Maharashtra, since 2009
- Onstage Experiences LLPActive, Maharashtra
- Onstage Founder I LLPActive, Wokingham, United Kingdom
- Onstage GP Holdco LtdActive, Activities of venture and development capital companies, Wokingham, United Kingdom
- Onstage GP I LLPActive, Wokingham, United Kingdom
- Onstage I LPActive, Wokingham, United Kingdom
- Onstage LimitedActive, Support activities to performing arts, Glasgow, United Kingdom
- OnStage Media Agentur GmbHActive, Pöcking, Germany
- Onstage Travel LimitedActive, Travel agency activities, Watford, United Kingdom
- Onstagevoice LtdActive, Educational support services, London, United Kingdom
- Onstak Technologies Private LimitedActive, Telangana, since 2014
- Onstal LtdActive, Information technology consultancy activities, Berkshire, United Kingdom
- Onstall Private LimitedActive, Tamil Nadu, since 2020
- OnStarDetroit
- OnStar de Mexico S. de R.L. de C.V.Active, Mexico City, Mexico
- OnStar Global Services CorporationActive, Wilmington, United States
- Onstar Pharmaceutical Private LimitedActive, Uttar Pradesh, since 2022
- Onstar Production Services LtdActive, Support activities to performing arts, Merstham, United Kingdom
- Onstar Venture Private LimitedActive, Telangana, since 2024
- OnStar, LLCActive, Wilmington, United States
- Onstara Private LimitedActive, Kerala, since 2022
- Onstate LimitedActive, Media representation services, Leeds, United Kingdom
- Onstay Living Solutions Private LimitedActive, West Bengal, since 2019
- Onsteed LtdActive, Retail sale of sports goods, fishing gear, camping goods, boats and bicycles, Worcester Park, United Kingdom
- Onsteering LtdActive, Other passenger land transport, Manchester, United Kingdom
- Onstile LimitedActive, Other letting and operating of own or leased real estate, Norley Warrington, United Kingdom
- Onstmettinger Bank eGActive, Albstadt, Germany
- Onsto Media Production Private LimitedActive, Karnataka, since 2025
- Onstock Trading UK LtdActive, Wholesale of electronic and telecommunications equipment and parts, London, United Kingdom
- Onstop Hire SsasActive, Chorley, United Kingdom
- Onstopdata Services Private LimitedActive, West Bengal, since 2024
- Onstore 24 LdaActive, Vila Chã - Vila Do Conde, Portugal
- Onstore 24 SLInactive, Tui, Spain
- Onstory LtdActive, Media representation services, Camden, United Kingdom
- Onstrada LimitedActive, Information technology consultancy activities, Newhaven, United Kingdom
- Onstran Technologies Private LimitedStruck off, Kerala, since 2015
- Onstrategy Consulting LimitedActive, Management consultancy activities other than financial management, Stoke Goldington, United Kingdom
- Onstream Communications LimitedActive, Other publishing activities, Cambridge, United Kingdom
- OnStream Consulting GmbHActive, Dortmund, Germany
- Onstream Digital LtdActive, Information technology consultancy activities, London, United Kingdom
- Onstream Europe LimitedActive, Renting and leasing of other machinery, equipment and tangible goods n.e.c., London, United Kingdom
- Onstream Group LimitedActive, Other business support service activities n.e.c., London, United Kingdom
- Onstream Holdings LimitedActive, Activities of other holding companies n.e.c., London, United Kingdom
- Onstream LimitedActive, Support activities for petroleum and natural gas extraction, Gerrards Cross, United Kingdom
- Onstream Management Systems LimitedActive, Management consultancy activities other than financial management, Lincoln, United Kingdom
- Onstream Meters LimitedActive, Renting and leasing of other machinery, equipment and tangible goods n.e.c., London, United Kingdom
- Onstreet Marketing Private LimitedActive, Delhi, since 2015
- ONSTREET THAI FOOD PrivateATE LIMITEDActive, Haryana, since 2016
- Onstruction LtdLiquidation, Construction of domestic buildings, Borehamwood, United Kingdom
- Onstructive India Private LimitedActive, West Bengal, since 2020
- Onstruq Infra LLPActive, Haryana, since 2024
- Onstruq LLPActive, Haryana
- Onstruq Private LimitedActive, Haryana, since 2020
- Onstyle Lifting & Engineering LimitedActive, Installation of industrial machinery and equipment, Nuneaton, United Kingdom
- Onstyle LtdActive, Other service activities n.e.c., London, United Kingdom
- Onsu Bakery LimitedActive, Other letting and operating of own or leased real estate, Westcliff On Sea, United Kingdom
- Onsu Bakery Soho LimitedActive, Licensed restaurants, Westcliff On Sea, United Kingdom
- Onsumaye Web Solutions Private LimitedActive, Delhi, since 2007
- Onsun Exports Private LimitedStruck off, Maharashtra, since 2021
- Onsun LimitedActive (proposal to strike off), Construction of domestic buildings, Nottingham, United Kingdom
- Onsun Logistics LPActive, Dundee, United Kingdom
- Onsunera Renewables Private LimitedActive, Maharashtra, since 2025
- Onsung Trading LtdActive, Retail sale in non-specialised stores with food, beverages or tobacco predominating, Gloucester, United Kingdom
- Onsupply LtdActive, Other retail sale not in stores, stalls or markets, London, United Kingdom
- Onsupport LtdActive, Other human health activities, Keighley, United Kingdom
- Onsupport Technologies Private LimitedActive, Karnataka, since 2020
- Onsur ReliefActive, United Kingdom
- Onsure Health Private LimitedActive, Delhi, since 2020
- Onsure Infotech Private LimitedActive, Delhi, since 2026
- Onsure Material (UK) Co., LimitedActive, Non-trading company, Grangetown, United Kingdom
- Onsurity Services Private LimitedActive, West Bengal, since 2019
- Onsurity Technologies Private LimitedActive, Karnataka, since 2020
- Onsurv LimitedActive, Other professional, scientific and technical activities n.e.c., Romford, United Kingdom
- Onswin Financial Services LtdActive, Financial intermediation not elsewhere classified, Surrey, United Kingdom
- Onswin Finserv Technology LimitedActive, Other information technology service activities, Surrey, United Kingdom
- Onswin Finserv Technology Private LimitedStruck off, Tamil Nadu, since 2024
- Onswitch Electricals LLPActive, since 2026
- Onswitch LimitedActive, Market research and public opinion polling, Sleaford, United Kingdom
- Onsy Mobile Innovations Private LimitedActive, Uttar Pradesh, since 2024
- Onsynch Technologies Private LimitedActive, Telangana, since 2025
- Onsys Technologies (OPC) Private LimitedActive, Maharashtra, since 2019
- Onsystem 11 Private LimitedActive, Gujarat, since 2022
- Onszeal BKC LLPActive, since 2025
- Onségen Ensemble
- Onsøy BilruterDissolved, public transport, Gressvik, Norway
- Onsøy Golfbane Holding AsActive, Manstad, Norway
- Onsøy Holding AsActive, Oslo, Norway
- Onsøy Rørleggerbedrift AsActive, Gressvik, Norway
- Onsøyen gård ASActive, Bosberg, Norway
- Ont Broadband Service (OPC) Private LimitedActive, Rajasthan, since 2020
- Ont Contractor LimitedActive, Development of building projects, Watford, United Kingdom
- Ont Eiendom AsActive, Sjernarøy, Norway
- Ont Electrical Contractors LimitedActive, Electrical installation, Exeter, United Kingdom
- Ont Gta Properties Inc.Active, Vaughan, Canada
- Ont Innovations Private LimitedActive, Tamil Nadu, since 2021
- Ont LimitedActive, Buying and selling of own real estate, London, United Kingdom
- Ont Nito LimitedActive, Wholesale of wine, beer, spirits and other alcoholic beverages, London, United Kingdom
- Ont S.R.L.Active, Milano, Italy
- ONT SNB Inc.Active, Vaughan, Canada
- Ont Sofa LtdActive, Video production activities, York, United Kingdom
- Ont Software Solutions Private LimitedActive, Karnataka, since 2022
- Ont Takeaway LtdActive, Take-away food shops and mobile food stands, Bradford, United Kingdom
- Ont Technocrats Private LimitedStruck off, Delhi, since 2012
- Ont-Uk LtdActive, Hospital activities, Colchester, United Kingdom
- Ont-wikkel Human CapitalActive, Rotterdam, Kingdom of the Netherlands
- Onta Designs LLPActive, Rajasthan, since 2024
- Onta Education LLPActive, since 2024
- Onta LtdActive, Other service activities n.e.c., Aberdeen, United Kingdom
- Onta Philosophy LtdActive, Cultural education, London, United Kingdom
- Ontabee Solutions Private LimitedActive, Tamil Nadu, since 2018
- Ontable Foods LLPActive, Maharashtra
- Ontable Realtors Private LimitedActive, Maharashtra, since 2018
- Ontacia Trade and Invest. LimitedActive, Tortola, United Kingdom
- Ontago Private LimitedActive, Kerala, since 2022
- Ontakego AI LtdActive, Other software publishing, London, United Kingdom
- Ontal Express Holdings Ltd.Active, Road Town, British Virgin Islands
- Ontal Property Management Private LimitedActive, Chandigarh, since 1999
- Ontal RealityActive, Jabalpur, India
- Ontalent LtdActive, Management consultancy activities other than financial management, London, United Kingdom
- Ontalento LtdActive, Other retail sale not in stores, stalls or markets, Marlow, United Kingdom
- Ontalia LtdActive, Security dealing on own account, Kingston Upon Thames, United Kingdom
- Ontalk Solutions Private LimitedStruck off, Uttar Pradesh, since 2022
- Ontalog SluActive, Villalbilla De Gumiel, Spain
- Ontam LtdActive, Retail sale via mail order houses or via Internet, Northampton, United Kingdom
- Ontamo Entertainment Private LimitedActive, Maharashtra, since 2019
- Ontap Bathrooms LtdActive, Plumbing, heat and air-conditioning installation, Winchester, United Kingdom
- Ontap Business Advisory LLPActive, since 2024
- Ontap Direct Private LimitedActive, Delhi, since 2021
- Ontap Infotech Private LimitedActive, Delhi, since 2015
- Ontap Learning LtdActive, Other education n.e.c., Newcastle Upon Tyne, United Kingdom
- Ontap LimitedActive, Public houses and bars, London, United Kingdom
- Ontap Loan Note Issuer LimitedActive, Financial intermediation not elsewhere classified, London, United Kingdom
- Ontap Management LimitedActive, Public houses and bars, Nottingham, United Kingdom
- Ontap Media LtdActive (proposal to strike off), Business and domestic software development, Romsey, United Kingdom
- Ontap Medical LimitedActive, Other human health activities, Corby, United Kingdom
- Ontap Receivables Trustee LimitedActive, Financial intermediation not elsewhere classified, London, United Kingdom
- Ontap SNC Di Cetani Raimondo & C.Active, Cornate D'Adda, Italy
- Ontap Technologies Private LimitedActive, Delhi, since 2024
- Ontapevents LtdActive, Event catering activities, Peterborough, United Kingdom
- Ontapit Consulting LimitedActive, Information technology consultancy activities, London, United Kingdom
- Ontapp LtdActive, Other software publishing, Teddington, United Kingdom
- Ontar Engineering LimitedActive, Other engineering activities, Wellingborough, United Kingdom
- Ontara Enterprises Private LimitedActive, Delhi, since 2025
- Ontara Trading Inc.Active, Tortola, British Virgin Islands
- Ontarget Asia LtdActive, Unlicensed restaurants and cafes, London, United Kingdom
- Ontarget Corporate Advisory Private LimitedActive, Maharashtra, since 2017
- onTarget GmbHActive, Löffingen, Germany
- ONTARGET HEALTHCARE PrivateATE LIMITEDActive, Maharashtra, since 2016
- Ontarget Infomatics Private LimitedActive, Telangana, since 2003
- Ontarget Investments LtdActive, Limassol, Cyprus
- Ontarget Pharma Consultancy LimitedActive, Management consultancy activities other than financial management, New Malden, United Kingdom
- Ontarget Publishing LimitedActive, Other publishing activities, Mersey Road, Liverpool, United Kingdom
- Ontarget Range LimitedActive, Other sports activities, Northampton, United Kingdom
- Ontarget Softech LLPActive, Uttar Pradesh, since 2018
- Ontargit LLPActive, London, United Kingdom
- Ontari Batasaari FoundationActive, Telangana, since 2025
- Ontari Holdings Ltd.Active, Edmonton, Canada
- Ontarindia Trade Private LimitedActive, Uttar Pradesh, since 2021
- Ontario Acquisitions FX Inter LimitedActive, Other business support service activities n.e.c., London, United Kingdom
- Ontario Airport Hotel CorporationActive, San Francisco, United States
- Ontario Airports Investments LimitedActive, Financial intermediation not elsewhere classified, London, United Kingdom
- Ontario Alliance of ClimbersOntario, Canada
- Ontario and Central Properties Inc.Active, Vaughan, Canada
- Ontario and Rainy River Railwayrail transport, Rainy River, Canada
- Ontario Arts CouncilCanada
- Ontario AsActive, Trondheim, Norway
- Ontario Assistants Desk Private LimitedStruck off, Karnataka, since 2017
- Ontario Association of Art GalleriesCanada
- Ontario Association of Certified Engineering Technicians and Technologists
- Ontario Association of Food BanksCanada
- Ontario Association of Former Parliamentarians
- Ontario Bancorporation, Inc.Active, Ontario, United States
- Ontario Bar AssociationToronto, Canada
- Ontario Basin Developments Phase 1 LimitedActive, Other letting and operating of own or leased real estate, Manchester, United Kingdom
- Ontario Basin Developments Phase 2 LimitedActive, Other letting and operating of own or leased real estate, Manchester, United Kingdom
- Ontario Bollards Inc.Active, Brampton, Canada
- Ontario Bridge & Roof Private LimitedStruck off, West Bengal, since 2012
- Ontario Business CorporationActive, Kitchener, Canada
- Ontario Cancer InstituteCanada
- Ontario Cannabis Retail Corporationcannabis monopoly, Ontario, Canada
- Ontario Central AirlinesCanada
- Ontario Centre of Forensic SciencesCanada
- Ontario Charitable Gaming Association
- Ontario Chemicals Private LimitedStruck off, Maharashtra, since 2002
- Ontario Chit and Finance Private LimitedStruck off, Delhi, since 1983
- Ontario Chromium Plating Inc.Active, Oakville, Canada
- Ontario Ci 2 LtdActive, George Town, Cayman Islands
- Ontario Clean Water AgencyCanada
- Ontario Club
- Ontario CNG Holt, LLCActive, Cerritos, United States
- Ontario Co-operative Associationagriculture, financial services, insurance, Guelph, Canada
- Ontario College of Art & Design UniversityActive, Toronto, Canada
- Ontario College of Family PhysiciansCanada
- Ontario College of TeachersToronto, Canada
- Ontario College of TradesCanada
- Ontario Colleges Athletic AssociationCanada
- Ontario Confederation of University Faculty AssociationsToronto, Canada
- Ontario Conservation Officers
- Ontario Construction & Investment Pvt LtdActive, West Bengal, since 1991
- Ontario Container Line Private LimitedActive, Delhi, since 2022
- Ontario Costruzioni S.R.L. in LiquidazioneActive, Lecce, Italy
- Ontario Council on Articulation and Transfer
- Ontario County Historical SocietyUnited States
- Ontario CreatesActive, Toronto, Canada
- Ontario Dairy Goat Co-Operative Inc.Active, Teeswater, Canada
- Ontario Dehy Inc.Active, Goderich, Canada
- Ontario Dental AssociationToronto, Canada
- Ontario Die Company LimitedActive, Waterloo, Canada
- Ontario Disability Employment NetworkCanada
- Ontario Door Sales Ltd.Active, Mississauga, Canada
- Ontario Drive & Gear LimitedActive, Saint John, Canada
- Ontario Education Facilitators Private LimitedStruck off, Punjab, since 2002
- Ontario Educational Credit Union LimitedActive, Mississauga, Canada
- Ontario Electrical and Electronics Private LimitedActive, Delhi, since 2019
- Ontario Electricity Financial CorporationActive, Toronto, Canada
- Ontario Electromechanica Private LimitedActive, Gujarat, since 1992
- Ontario Engineering Private LimitedActive, Maharashtra, since 2009
- Ontario eSchool Asia LimitedActive, Hong Kong, Hong Kong
- Ontario ExpressDissolved, Canada
- Ontario Federation of AgricultureGuelph, Canada
- Ontario Federation of Anglers and HuntersPeterborough, Canada
- Ontario Federation of School Athletic Associations
- Ontario Federation of Trail Riders Inc.Active, Mono, Canada
- Ontario Film Review BoardCanada
- Ontario Financing AuthorityActive, Toronto, Canada
- Ontario First Party
- Ontario Forest Research InstituteCanada
- Ontario Fruit and Vegetable Growers' AssociationCanada
- Ontario Furniture Stores LimitedActive, Retail of furniture, lighting, and similar (not musical instruments or scores) in specialised store, Basildon, U
- Ontario Fury IIUnited States
- Ontario Gaming East Limited PartnershipActive, Coquitlam, Canada
- Ontario Gaming GTA Limited PartnershipActive, North York, Canada
- Ontario Gateway JH Retail Xix, LLCActive, Camden, United States
- Ontario Gateway SJT Retail Xix, LLCActive, Camden, United States
- Ontario GazetteCanada
- Ontario Genealogical SocietyConcord, Canada
- Ontario GenomicsMaRS Discovery District, Canada
- Ontario Geological Survey
- Ontario Gurdwara CommitteeCanada
- Ontario Handweavers & SpinnersCanada
- Ontario HealthCanada
- Ontario Health Insurance PlanCanada
- Ontario Heights Private LimitedActive, West Bengal, since 2012
- Ontario Heritage Trust
- Ontario Holding International B.V. in liquidatieInactive, Amsterdam, Kingdom of the Netherlands
- Ontario Holding LimitedActive, Activities of production holding companies, Wrexham, United Kingdom
- Ontario Homesphere LtdActive, Other letting and operating of own or leased real estate, Mildenhall, United Kingdom
- Ontario Horticultural AssociationCanada
- Ontario Hose Specialties LimitedActive, Mississauga, Canada
- Ontario Hospital Associationhealth care, business and professional associations, unions, Toronto, Canada
- Ontario Hotels Pvt.ltd.Struck off, Maharashtra, since 1992
- Ontario Human Rights CommissionCanada
- Ontario HydroDissolved, energy and water industries, Toronto, Canada
- Ontario Immigration Services Private LimitedActive, Punjab, since 2018
- Ontario Impex Private LimitedStruck off, Delhi, since 1994
- Ontario Inc.Active, Toronto, Canada
- Ontario Infratech Private LimitedActive, Delhi, since 2021
- Ontario Inspirations LimitedActive, Other business support service activities n.e.c., Leeds, United Kingdom
- Ontario Institute for Cancer ResearchCanada
- Ontario International Airport AuthorityUnited States
- Ontario International LPActive, Edinburgh, United Kingdom
- Ontario Investments SPActive, Edinburgh, United Kingdom
- Ontario Landowners Association
- Ontario Liberal PartyToronto, Canada
- Ontario Libertarian PartyToronto, Canada
- Ontario Library AssociationToronto, Canada
- Ontario LimitedActive, Douglas, United Kingdom
- Ontario Limited 458981Active, Ottawa, Canada
- Ontario Livestock Exchange Inc.Active, Waterloo, Canada
- Ontario Ltd.Active, Milton, Canada
- Ontario Malleable Iron Companyindustrial manufacturing, Oshawa, Canada
- Ontario Management LimitedActive, Activities of production holding companies, Wrexham, United Kingdom
- Ontario Marketing ABActive, Lidingö, Sweden
- Ontario Medical AssociationToronto, Canada
- Ontario Medical LtdActive, Other human health activities, Borehamwood, United Kingdom
- Ontario Mills II Limited PartnershipActive, Wilmington, United States
- Ontario Mills III Limited PartnershipActive, Wilmington, United States
- Ontario Mills Limited PartnershipActive, Wilmington, United States
- Ontario Ministry of Citizenship and Immigration
- Ontario Model ParliamentToronto, Canada
- Ontario Moderate PartyCanada
- Ontario Montclair School Employees Federal Credit UnionActive, Ontario, United States
- Ontario Motion Picture BureauCanada
- Ontario Mountain Associates, LPInactive, Los Angeles, United States
- Ontario Multi-Asset FundInactive, Toronto, Canada
- Ontario Mushroom FarmsActive, Whitby, Canada
- Ontario Natural Food Company Inc.Active, Mississauga, Canada
- Ontario Natural Food Company Inc.Inactive, Mississauga, Canada
- Ontario NatureOntario, Canada
- Ontario New Democratic PartyToronto, Canada
- Ontario New England Express Inc.Active, Milton, Canada
- Ontario No. 1 Apartments PartnershipActive, Ottawa, Canada
- Ontario Non-Profit Housing AssociationActive, Toronto, Canada
- Ontario NorthlandNorth Bay, Canada
- Ontario Nutri Lab Inc.Active, Fergus, Canada
- Ontario OmbudsmanBell Trinity Square, Canada
- Ontario Organics LLPActive, Gujarat
- Ontario Organics Private LimitedActive, Gujarat, since 2001
- Ontario Ovens Inc.Active, Brampton, Canada
- Ontario ParksCanada
- Ontario Parliament NetworkCanada
- Ontario Parole Board
- Ontario PartyDissolved, Canada
- Ontario Pension BoardActive, Toronto, Canada
- Ontario Pension Boardpension fund
- Ontario Pickle CorporationActive, Chatham, Canada
- Ontario Place Homes Limited PartnershipActive, Toledo, United States
- Ontario Plants Propagation LimitedInactive, Saint-Thomas, Canada
- Ontario Plants Propagation LimitedActive, Saint-Thomas, Canada
- Ontario Police CollegeCanada
- Ontario Power Authorityelectricity generation, Toronto, Canada
- Ontario Power Generationelectricity generation, Toronto, Canada
- Ontario Power Generation Energy Trading, Inc.Active, Toronto, Canada
- Ontario Power Generation Inc.Active, Toronto, Canada
- Ontario Power Generation Inc. Pension PlanActive, Toronto, Canada
- Ontario Property LtdActive, Buying and selling of own real estate, Wakefield, United Kingdom
- Ontario ProudToronto
- Ontario Provincial Confederation of Regions PartyCanada
- Ontario Provincial Police Association Credit Union LimitedActive, Barrie, Canada
- Ontario Public School Boards' Association
- Ontario Real Estate LPActive, Edinburgh, United Kingdom
- Ontario Recruitment LimitedActive, Dublin, Ireland
- Ontario Regional Lily SocietyCanada
- Ontario Research and Innovation Optical Networktelecommunications network, Toronto, Canada
- Ontario Restaurant Hotel Motel AssociationActive, Mississauga, Canada
- Ontario Retail Partners, LLCActive, Newport Beach, United States
- Ontario S.R.L.Active, Asolo, Italy
- Ontario S.R.L.Active, Tremestieri Etneo, Italy
- Ontario Sarracini Travel Ltd.Active, Concord, Canada
- Ontario School Boards' Insurance ExchangeActive, Guelph, Canada
- Ontario Science Partners General PartnershipActive, Canada, Canada
- Ontario Securities CommissionToronto, Canada
- Ontario Seed Co. LimitedActive, Kitchener, Canada
- Ontario Seniors' Secretariat
- Ontario ShoresActive, Newfane, United States
- Ontario Shores Centre for Mental Health SciencesCanada
- Ontario SLActive, Bilbao, Spain
- Ontario Soccer AssociationCanada
- Ontario Society for the Prevention of Cruelty to AnimalsNewmarket, Canada
- Ontario Solar Holdings LPActive, Toronto, Canada
- Ontario Spe S.R.L.Active, Milano, Italy
- Ontario Specialty Contracting, Inc.Active, Buffalo, United States
- Ontario Sports Solutions (PAG) L.P.Active, Toronto, Canada
- Ontario Stair & Floor Supply Inc.Active, Vaughan, Canada
- Ontario Stock and Commodity Services Private LimitedStruck off, Maharashtra, since 2008
- Ontario Stone Supply Inc.Active, Caledonia, Canada
- Ontario Street Mezz LLCActive, Wilmington, United States
- Ontario Street Owner LLCActive, Wilmington, United States
- Ontario Student Trustees' Associationeducation, Toronto
- Ontario Students Against Impaired DrivingCanada
- Ontario Sustainable Energy AssociationToronto, Canada
- Ontario Teachers Insurance PlanActive, Waterloo, Canada
- Ontario Teachers' Pension Planpension fund, Toronto, Canada
- Ontario Teachers' Pension Plan (Europe) LimitedActive, Fund management activities, London, United Kingdom
- Ontario Teachers' Pension Plan (India) Private LimitedActive, Mumbai, India
- Ontario Teachers' Pension Plan (Sea) Private LimitedActive, Singapore, Singapore
- Ontario Teachers' Pension Plan BoardActive, Toronto, On, United Kingdom
- Ontario Teachers' Pension Plan BoardActive, Toronto, Canada
- Ontario Teachers’ Finance TrustActive, Toronto, Canada
- Ontario Teachers’ Pension Plan (Europe) Re LimitedActive, Fund management activities, London, United Kingdom
- Ontario TH Affordable LLCActive, Sacramento, United States
- Ontario Trade OÜActive, Tallinn, Estonia
- Ontario Trading Private LimitedStruck off, Maharashtra, since 2008
- Ontario Trails CouncilDeseronto, Canada
- Ontario Transit Group Inc.Active, Ontario, Canada
- Ontario UK Partnership LtdActive, Agents involved in the sale of food, beverages and tobacco, Hastings, United Kingdom
- Ontario Undergraduate Student AllianceCanada
- Ontario Universities' Application CentreCanada
- Ontario Ventures LimitedActive, Development of building projects, Oldbury, United Kingdom
- Ontario Veterinary CollegeCanada
- Ontario Wealth Management CorporationActive, Toronto, Canada
- Ontario Women's Directorate
- Ontario Women's Hockey AssociationMississauga, Canada
- Ontario Works
- Ontario Yachtsbuilding of pleasure and sporting boats
- Ontario Youth Parliament
- Ontario'sretail
- Ontariograin.ag LPActive, London, Canada
- Ontaro LimitedActive, Business and domestic software development, Chesterfield, United Kingdom
- Ontash India Technologies Private LimitedActive, Kerala, since 2007
- Ontask Technologies Private LimitedActive, Maharashtra, since 2015
- Ontatile LtdActive, Buying and selling of own real estate, Rochford, United Kingdom
- Ontax Accountants (Scot) LtdActive, Other letting and operating of own or leased real estate, Dunfermline, United Kingdom
- Ontax Accountants LtdActive, Accounting and auditing activities, Dunfermline, United Kingdom
- Ontaxco Professional Workforce PrivateActive, Delhi, since 2018
- OntbijtcentraleActive, Scherpenheuvel-Zichem, Belgium
- Ontc International Private LimitedActive, Rajasthan, since 2024
- Ontdekken LtdActive, Information technology consultancy activities, Walton On Thames, United Kingdom
- Ontdekker B.V.Active, Ijsselstein, Kingdom of the Netherlands
- Ontdekkers B.V.Active, Almelo, Kingdom of the Netherlands
- Onte Digital LtdActive, Advertising agencies, Bristol, United Kingdom
- Onte Office Interior Private LimitedActive, Maharashtra, since 2023
- Onte Technologies Private LimitedActive, Maharashtra, since 2023
- Ontea Foods and Beverages Private LimitedActive, Andhra Pradesh, since 2021
- Onteach Consulting (OPC) Private LimitedActive, Karnataka, since 2023
- Onteam Hospitality LLPActive, Delhi
- Ontec LtdActive, Management consultancy activities other than financial management, Manchester, United Kingdom
- Onteca LimitedActive, Ready-made interactive leisure and entertainment software development, Merseyside, United Kingdom
- Ontech Communications LimitedActive, Other construction installation, St. Albans, United Kingdom
- Ontech Digital Technologies Private LimitedActive, Delhi, since 2018
- Ontech Global IT Solution Private LimitedActive, Jharkhand, since 2021
- Ontech Infra Private LimitedActive, Maharashtra, since 2026
- Ontech LtdActive, Retail sale via mail order houses or via Internet, London, United Kingdom
- Ontech Security Group LtdActive, Other information technology service activities, London, United Kingdom
- Ontech Security Holding LtdActive, Activities of other holding companies n.e.c., London, United Kingdom
- Ontech Services Private LimitedActive, Gujarat, since 2025
- Ontech Soft Private LimitedStruck off, Maharashtra, since 2012
- Ontech Solutions LtdActive, Business and domestic software development, March, United Kingdom
- Ontech Solutions Private LimitedActive, Maharashtra, since 2025
- Ontech Strategic Solutions LimitedActive, Information technology consultancy activities, Mitcham, United Kingdom
- Onteck LimitedActive, Information technology consultancy activities, Beverley, United Kingdom
- Ontecnia Media Networks SLActive, Valencia, Spain
- OntecoActive, Harelbeke, Belgium
- Onteddu Foods LLPActive, Telangana
- Onteddu Rajamohan ReddyActive, Shamshabad, India
- Ontegral Infosoft (OPC) Private LimitedActive, Uttar Pradesh, since 2017
- Onteigeningsadviesbureau De Boer B.V.Active, Baarn, Kingdom of the Netherlands
- Onteigo LtdActive, Business and domestic software development, London, United Kingdom
- Ontek LimitedActive, Non-trading company, Chesterfield, United Kingdom
- Ontek Systems LimitedActive, Information technology consultancy activities, Nantwich, United Kingdom
- Ontel LtdActive (proposal to strike off), Other telecommunications activities, Camberley, United Kingdom
- Ontel Pacific Marketing India Private LimitedStruck off, Tamil Nadu, since 2014
- Ontel Remote Infrastructure Management Private LimitedActive, Delhi, since 2024
- Ontel Services LtdActive, Other telecommunications activities, Tring, United Kingdom
- Ontelaunee Power Operating Company, LLCActive, Dover, United States
- Ontelligence Private LimitedActive, West Bengal, since 2020
- Ontellix LtdActive, Information technology consultancy activities, London, United Kingdom
- Ontello Business Services PrivatelimitedActive, Madhya Pradesh, since 2016
- Ontello Electronics Private LimitedStruck off, Madhya Pradesh, since 2013
- Ontelo LtdActive, Information technology consultancy activities, London, United Kingdom
- Ontemp LtdActive, Temporary employment agency activities, High Wycombe, United Kingdom
- Ontempo Musics LLPActive, Kerala, since 2016
- Onteneleven LtdActive, Management consultancy activities other than financial management, London, United Kingdom
- Ontenet Digital LtdActive, Business and domestic software development, London, United Kingdom
- Onteniente De Inversiones SLInactive, Valencia, Spain
- Onteon Private LimitedActive, Maharashtra, since 2025
- Onteq IT Services Private LimitedActive, Kerala, since 2021
- Onteq Solutions Private LimitedStruck off, West Bengal, since 2012
- Onter Private LimitedActive, Karnataka, since 2021
- Onteratelecommunications industry, North Bay, Canada
- Ontera Healthcare Private LimitedActive, Uttar Pradesh, since 2026
- Ontera LimitedActive, Residential nursing care facilities, Crawley, United Kingdom
- ONterim ABActive, Sollentuna, Sweden
- Ontermann LPActive, Kington, United Kingdom
- Onternity Consegic Marketers LLPStruck off
- Onterpreunial Business House Private LimitedActive, Bihar, since 2022
- Onterra Capital Advisors LLPActive, Maharashtra, since 2025
- Onterra Capital Private LimitedActive, Maharashtra, since 2025