The DiversityInc top 50 list, issued yearly since 2001, recognise efforts by US companies in including diversity and inclusion in areas such as hiring, retaining and promoting women, minorities, people with disabilities, LGBT and veterans.
Dean Seavers, president of National Grid, said: "We have always been committed to developing a diverse and inclusive workforce that reflects the communities we serve.
"As we embark on a journey to becoming a leader in the decarbonisation of the northeast, it's more important than ever to have diverse perspectives and ideas that will help us innovate and succeed for our customers."
The news follows National Grid publishing its Northeast 80x50 Pathway in June 2018, which sets a roadmap for the utility to supporting its customers and communities in the clean energy transition.
Enabling that shift will require engaged employees who feel safe and supported in bringing their best selves to work every day, according to the utility.
"At National Grid, championing diversity and inclusion means taking action," added Keith Hutchison, National Grid's chief diversity Officer. "Our efforts to develop active and meaningful employee resource groups have made us a better organization and employer."
For more information, visit www.diversityinc.com