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What is this game about?
Large companies must report certain information every year to the
US Securities and Exchange Commission (SEC).
Click the image to continue...
These reports must list "significant" subsidiaries.
We believe it's vital for our society to understand how
corporations exercise control over their various parts.
Our OpenCorporates robots attempt to extract this information
automatically, but sometimes they get it wrong.
When our robots get it wrong, we need intelligent humans (like
you!) to help extract this data. You'll be copying
information from SEC filings into a form on OpenCorporates.
Sometimes the data is quite complex - for example, when
there are subsidiaries-of-subsidiaries listed. In these
cases, just click the button which refers the filing to an
Thanks for helping - by making this data open, you will help
journalists, researchers and consumers monitor the structure of these
We ask all our contributors to log in. This is so we can
track data quality and make it less likely we'll be
spammed. If you login with Twitter or LinkedIn, we promise
not to post anything to your account without asking you