Private companies are often part of an industry ecosystem but often there is little information particular to private firms. FSU has a few good tools for understanding private firms place in an industry.
NetAdvantage's "Industries" tab covers 54 industries making up 98% of all industries in the US. The data on industry overview, sectors, and trends is excellent as a macroeconomic overview for the industry and section title "How To Analyze This Industry" provides basic qualitative and qualitative information for understanding how a company in the industry can effectively compete. Use with BizMiner to create a basic financial picture for a private company.
First Research Industry Profiles are available as part of Hoover's Academic. There are unique sections including Trends & Opportunities, "Call Preparation Questions", "Executive Insight", and "Business Challenges." This helps understand challenges that private company may face in industry as well as opportunities a private company can exploit.
A collection of Industry Market Research and Industry Risk Ratings. Coverage includes over 700 U.S. industries in over 1100 industry-specific reports. Research reports contain trends, statistics and analysis on market size, market share of competitors, forcasting, and industry growth rates. Performance analysis includes emerging trends, recent production performance and 5 year forecasts. The US Specialized Industry Reports series covers niche industries such as pawn shops, boat insurance companies, air gun manufacturers and circus operators.