As far as I know it's EX, EQ, and possibly Duns.
It would probably be a good question to start a separate topic though.
Others with more knowledge might give input.
I know of two business only reporting agencies that keep the information on the reports forever. One is industry specific and operates only in one state. Both report the entire history of the business. I believe LexisNexis may also report everything forever. There might be a fourth, D&B.
National Association of Credit Management continues to update reports without removing information. The Bureau of Credits, a Michigan based CRA that used to also operate in Indiana, also adds new information and takes nothing away. LexisNexis reports go back decades. I just ran one a few days ago on a customer. A bankruptcy from over 15 years ago was on it. Also, lawsuits from decades back. I'm not certain if LN go back generations on long established businesses. D&B I know used to just update reports and nothing came off, but I have not utilized its services in several years.