The firm, ranked 21 out of 700 global businesses, is the highest ranking professional services firm in the report which assesses 700 employers in how they promote all forms of diversity.
Head of responsible business, Kate Fergusson, said: "We are proud to be recognised for the work we do to support diversity and inclusion at Pinsent Masons and beyond but we recognise that this is a journey and there is more work to be done.
"We feel strongly that we have a responsibility to champion change in the wider community and ensure everyone can be bring their whole selves to work. Pinsent Masons strives to create an inclusive workplace which reflects our dedication to diversity and inclusion in everything we do from recruitment processes through to engagement with clients."
In January Pinsent Masons was named as the most inclusive employer in the UK by lesbian, gay, bi and trans equality charity Stonewall in its Top 100 Employers list for 2019. In October work-life balance charity Working Families highlighted the firm as a top ten family-friendly employer in the UK.
A total of 10,000 privately held and publicly listed companies employing at least 250 people were surveyed as part of the report.The diversity leaders have been identified via an independent survey of more than 80,000 employees in Austria, Belgium, France, Germany, Italy, Luxembourg, the Netherlands, Sweden, Switzerland and the UK. Furthermore the research included the views of human resources and recruitment experts.