Seeking Help to Identify Unenriched Leads from 900 Companies

Hi guys, Anyone with clay expertise can help me in a thing where I'm stucked now? issue: Actually,I had 900 companies and I enriched the whole table by applying finding people at these companies now the new table only got me 405 enriched companies via employees but remaining 500 leads didn’t enriched, Can someone help me finding how can i find which kind of leads didn't enrich from whole 910 original table? Thanks Haddid