Latina:

OBI Group Holding
OceanAir
Octocom
Octopus Energy Group
Officine Cosmetiche srls
officine del sapere
OHB Italia SpA
Ohmspace
Olis We Innovate Cooking
Omega Pharma
omnia della toffola
Omnicom Media
Omnicom Media Italy
Omnissa
Omnissa (Italy) S.r.l.
Oncode
OneOcean Group
OneStream Software LLC
Oniverse
Onyx Technology S.r.L.
Opdenergy
OPEN architettura
Open Executive Search & Selection - Milan & London
Open Reply IT
Open Smart Services
Open-Xchange Inc.
openjobmetis
Openjobmetis SpA
OPLIUM
OPPO
Optimares Spa
Optimus Search
OralPro
Orange
Orbyta Group
Orchard Robotics
Organon Italia
Organon LLC
Orienta Agenzia per il Lavoro
Orienta SPA
ORIZZONTE SISTEMI NAVALI S.p.A.
Osborne Clarke - Partnership
Out in Science, Technology, Engineering, and Mathematics
OutSystems, Inc.
OVERTECH Consulting
ovs
OVS S.p.A.
Oxford Instruments
Oxigent Technologies