I am using GET https://api.company-information.service.gov.uk/company/{company_number}/filing-history.
The documentation of what is returned states that the category name can have possible values: accounts, address, annual-return, capital, change-of-name, incorporation, liquidation, miscellaneous, mortgage, officers, and resolution.
My experiments show this list is incomplete. Other possible values include: confirmation-statement, document-replacement, insolvency, and persons-with-significant-control. There may be others.
The documentation does not provide a comprehensive list of the category enumeration’s values.