The four ARK ETFs are now restored to the constituentdata42.csv file as follows:

ARK Industrial Innovation ETF ARKQ US Equity ETF
ARK Web x.0 ETF ARKW US Equity ETF
ARK Innovation ETF ARKK US Equity ETF
ARK Genomic Revolution Multi-Sector ETF ARKG US Equity ETF

I was overly optimistic about the time frame to complete our coverage of all US traded ETFs.  After these four ARK ETFs, there are approxinately 198 exchange traded products yet to go.  This will be complete soon, but it will be more than a few days.