The deals involve separating cash from assets like property and shares, and looking at bank accounts to assess cash values, one of the sources told Reuters.
One businessman had tens of millions of Saudi riyals withdrawn from his account after he signed.
In another case, a former senior official consented to hand over ownership of four billion riyals worth of shares, the source said.
Why did Saudi Arabia's purge set its eye on billionaire media tycoons?
The Saudi government earlier this week moved from freezing accounts to issuing instructions for "expropriation of unencumbered assets" or seizure of assets, said a second source familiar with the situation.
There was no immediate comment from the Saudi government on the deals.
Dozens of princes, senior officials and businessmen, including cabinet ministers and billionaires, have been detained in the inquiry at least partly aimed at strengthening the power of Crown Prince Mohammed bin Salman.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ