It was the office of personnel management, so not just the CIA, but every agency in which you could need a clearance. Everything from Department of Energy to the NSA, From a low level army grunt moving boxes to high level weapons builders and guys doing IT for contractors. Anyone who had submitted an SF86 up to that point had every place they've lived, every family member, every job, details about education, drug use, mental health and alcohol abuse, debt, etc basically handed over.

Best part is, OPM offered two years of identity theft protection as a "oopsywoopsy we fwucked up biiiiiiig time sowwy"