Every single-employer defined-benefit pension plan that the Pension Benefit Guaranty Corporation has trusteed after the sponsor went bankrupt or otherwise failed — 5,170 plans, 2.5M total participants affected. Per plan: PBGC case number, sponsor company name + EIN + plan number, sponsor city + state, plan-termination date, PBGC-trusteeship date, participant count at termination (aggregate only, no individual PII). Covers four decades of corporate pension collapses (US Airways pilots, Bethlehem Steel, Sears, Toys R Us, Polaroid, etc). Powers /pbgc-plan/{case_number} canonical pages and /pbgc-sponsor/{ein} cross-plan profiles.
Every record in this dataset can be traced back to its primary source at https://www.pbgc.gov/about/open-government/data-sets. Underlying content is a US federal government work (public domain under 17 USC §105); our derived data is licensed CC0 1.0.