ARK publishes their "balance sheets" daily. I noticed that they update them usually around 6:30PM central. So you're basically just comparing with previous day's data to find deltas.

The data is updated every day. They are actively managed so they'll send trade data via email if you request it.

They update their holdings every day at https://ark-funds.com/investor-resources - I've been scraping that to https://github.com/tigger0jk/ark-invest-scraper for almost a month now (I did not make this website).

They also will email you daily trade notifications if you request them: https://ark-funds.com/subscribe (I'm not scraping those)