Take 10: 10 years of the B Corp movement in the UK
A summary of key findings from the "Take 10 | B Lab UK impact report" (B Lab UK, 2025) — concrete data showing that companies which systematically measure and manage their social impact grow faster, perform better for employees and earn greater trust.
This page is an independent summary compiled by the Impactso team as evidence for the claim that "organisations that measure impact are more credible, effective and better funded". Impactso is not the author of the original report — that is B Lab UK.
Key figures from the report
Why this matters for impact measurement
The report shows that companies which systematically measure, document and verify their social and environmental impact (B Corp certification requires completing the B Impact Assessment) grow faster over the long term than comparable companies without such a system. This is exactly the principle Impactso is built on — without measurable, verifiable data, impact can neither be managed nor credibly communicated to donors, investors or customers.
The report's authors also note that the comparison was made against companies that had completed part of the B Impact Assessment but did not manage impact systematically — precisely the gap that a structured approach to impact measurement, such as the Impactso platform, aims to fill.
Source and full report
The report "Take 10 | B Lab UK impact report" was published by B Lab UK to mark the 10th anniversary of the B Corp movement in the UK. It contains the full methodology, data sources and further case studies of certified companies.