I'm having trouble understanding what companies or industry these data reflect. https://dataforest.sequoia.com/about/#methodology https://dataforest.sequoia.com

I'm having trouble understanding what companies or industry these data reflect. https://dataforest.sequoia.com/about/#methodology https://dataforest.sequoia.com/about/#methodology Is this startups? All companies? Are food processors and cement producers and machine shops included here?