Comprehensive Company Background Research

I need a detailed background check on a company based in Ohio.

Key areas of interest include:
- SEC Filings: Focus on annual reports (10-K)
- Ownership Structure:
- Majority shareholders
- Minority shareholders
- Historical changes in ownership
- If possible, I'd also like information on key suppliers, all investors, and partnerships.

Ideal Skills & Experience:
- Experience with SEC filings and corporate research
- Strong analytical skills
- Attention to detail
- Background in finance or corporate law is a plus

Please provide examples of similar work done.