Private company, start-up, venture-capital, private equity data are available in the following subscription-based databases:
All federally filed private placements ― “equity” or ownership change in a company above a certain monetary threshold, but without a formal IPO or M&A process. Data from 5 different SEC filings.
Latin American Private Equity & Venture Capital Association
Open data sources:
Patents are a valuable source of information. Patents not only provide details about an invention or technology, but provide insight into companies research activities -which are rarely recorded elsewhere- and a record of their trajectory in innovation.
To find patent data, you can browse through the following databases:
WRDS US Patents (Beta) - current data coverage between 2011 and 2019.
General country patent and R&D statistics are available on Passport.