H-1B Employers: O
- O'Grady Peyton International 15
- O3 Technology Solutions 49
- o9 Solutions 58
- Oak Street Health MSO 26
- Oakland University 13
- Oakton Technologies 20
- Obayashi 17
- Oberlin College 16
- Objects on Net 19
- Occidental Petroleum 27
- Ocean Blue Solutions 15
- Ocher Technology Group 10
- Ochsner Clinic Foundation 117
- Oclc 27
- Octagon IT 27
- Oculii 10
- Odin Aerotech 12
- Odoo 24
- Ofinno 10
- Ohio Farmers Insurance Company 21
- OhioHealth 41
- OhioHealth Physician Group 12
- OKBL USA Technology 52
- OKC USA Holding 10
- Oklahoma Blood Institute 11
- Oklahoma Medical Research Foundation 13
- Oklahoma State University 56
- Okta 125
- Olam Americas 11
- Old Dominion University 73
- Oliver Wyman 20
- Oliver Wyman Actuarial Consulting 10
- Olsson 10
- OM Partners USA 42
- Om Tek 28
- Omd USA 17
- Omni Family Health 11
- Omnicell 11
- Omnissa 44
- OmniVision Technologies 39
- Oncorre 16
- One on One Physical Therapy 16
- OneMain General Services 93
- OneStopD Solutions 12
- ONEUS Technologies 27
- Onix Networking 10
- Only IT Consulting 28
- Onto Innovation 25
- Onward Technologies 25
- Open Systems 14
- Open Systems International 15
- OpenAI OpCo 232
- OpenGov 10
- Openkyber 12
- OPmobility Holding USA 11
- Oportun 19
- Optimal 21
- Optimal Technologies 35
- Optimized Investment Holdings 21
- Optivent Group 24
- Optiver Services US 36
- Optum Care 15
- Optum Services 466
- Optym 15
- Opulentsoft 10
- Opus Technologies 18
- Opusclip 10
- Ora Apps 10
- Orabase Solutions 21
- Oracle America 1,027
- Oracle Financial Services Software 43
- Oral Roberts University 11
- Orangeburg County School District 44
- Orbisiq 22
- Orbit Systems 11
- Oregon Health & Science University 105
- Oregon State University 112
- Orien Solutions 41
- Origin Hubs 26
- Origintek Solutions 22
- Orion Systems Integrators 117
- Oriontek 27
- Orlando Health 14
- Orpine 86
- Orrba Systems 17
- Orsted North America 15
- Oscar Management 17
- Oscar Renda Contracting 10
- Oscilar 10
- OSF Healthcare System 67
- OSF Multi-Specialty Group 55
- OSI Digital 21
- Osi Engineering 10
- Oss 15
- OT Technology 47
- Otis Elevator Company 17
- Otsuka Pharmaceutical Development & Commercialization 13
- Otter.ai 36
- OU Health Partners 31
- OuraRing 17
- Ouro Global 15
- Overhead Door 12
- Ovs Technologies 23
- Owens Corning Corporate Services 14
- O’Reilly Technology Services 15