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.
The listed URL identifies a referenced source; it does not by itself document the ingestion endpoint. Referenced source URL: https://www.pbgc.gov/about/open-government/data-sets. Source-specific terms apply. US federal employee-authored works are generally public domain under 17 USC 105; non-federal and third-party material retains source terms. Free or keyless access does not alter source terms. Metadata and normalization authored by MORVS (AI Analytics LLC) are CC0 only where expressly stated.