*Blockholders' data is reported by firm for the period 1996-2001: https://wrds-www.wharton.upenn.edu/pages/get-data/blockholders/
I pulled everything (8 vars) used the first one. See [[wrds]] for the full date range (1980-1 to 2020-9) as tdtpreprocessing. The file is:
===Restoring the old data===