created CompanyC in Contacts,how to MasUpdate with AccountName

I have Accounts,Contacts in Local installed Bitnami 7.6.4 version. Working fine.

But I need to Mass update the new created CompanyC field (Text) with the corresponding Account name for the Contacts,
Thanks William.

If it’s just a one time update, maybe it’s easier to do it from SQL (phpMyAdmin).

There are ways to add fields to mass update, if you prefer: