Comment by MarkusAllen

This exists partially - you can often find it by searching "[company name] acquired by" + checking the acquiring firm.

  The bigger problem: PE firms deliberately obscure ownership through multiple holding companies. It's part of the strategy.

  Example with autism centers:
  - PE firm creates "AutismCare Holdings LLC"
  - That entity owns 500 centers
  - Each center keeps its local brand name
  - Parents have no idea they're paying a PE-optimized operation

  The glossary I made includes terms like "Portfolio Company" and "Management Company" that explain this structure:
  https://founderstowne.com/extraction-terms.html

  A database would be valuable, but PE firms would just add more shell companies. The obfuscation is intentional.