Pulling a history of the holdings for ark invest funds https://ark-funds.com/
They also provide the last year's worth of trades in PDF, which I'm not currently scraping https://ark-invest.com/wp-content/trades/ARK_Trades.pdf
If you are doing historical analysis, note that some files were renamed around 10/17/2021 - see #6 (comment) for details. They were renamed again (reversing the original renames I believe) around 11/3/2021, see #8 for details. Also at various times there have been scraping errors that resulted in bad data being committed - other issues should track most or all of those outages.