Seraf calculates Value based on the share price of the most recent round of financing multiplied by the number of shares held. So in order to update the value column, you may need to add a new round of financing, even if you didn't personally invest. Investments in notes are left at their cost basis.
Seraf's Professional and Enterprise clients, can also add a valuation to better reflect the current value of their holdings. In this case, it is the most recently dated round or valuation that drives the Value.