Zakat on Sarwa account

Assalam Alaikum,

I have created a Sarwa investing account (5/6 risk), below are the assets and their current weights:

  • |ISDW| Developed Markets Stocks (Halal) - 54.3%
  • |ISDU| US Stocks (Halal) - 21.6%
  • |USD| Cash (in USD) - 19.2%
  • |ISDE| Emerging Markets Stocks (Halal) - 4.9%

How to I calculate the Zakat on this account? when is it due? and what’s the Zakat threshold for such case?

Thank you, may Allah bless you.