Welltower OP LLC engages in the provision of health care infrastructure and investment of seniors housing operators, post-acute providers, and health systems. It operates through the following segments: Seniors Housing Operating, Triple-net, and Outpatient Medical. The Seniors Housing Operating segment includes the seniors housing communities. The Triple-net segment offers long-term/post-acute care facilities, assisted living facilities, independent living/continuing care retirement communities, care homes (United Kingdom), independent support living facilities (Canada), care homes with nursing (United Kingdom), and combinations thereof. The Outpatient Medical segment provides outpatient medical buildings. The company was founded in 1970 and is headquartered in Toledo, OH.