Public Limited Companies must publish their yearly report since shareholders have to know what is happening - a google search will provide them in the most of the cases.
Limited Liability Companies are usually obliged to issue their yearly report except the case of a single owner company - google search.
Some non-profits, especially foundations must publish their yearly reports -google search.
Banks have to publish their yearly report - google search.
Other companies usually do not have to publish their annual reports, but you can find aggregates on the National Statistic Institutes' web pages, and you can make estimates.
Nobody collects and order all individual reports (Statistics only publish some secondary numbers). Those are on files in the tax authorities' offices, not published.