The correct answer to the following question will be the "Buy-side marketplace".
Explanation:
It is the financial market side that buys and sells large sections of shares for investment or financial advisory purposes.
Buy-side experts work with insurance provider companies, investment funds and pension funds as they buy large amounts of assets for investment managers.
And, If companies seek tenders for contracts according to their own contracting website, they are known as a Buy-side procurement.
Therefore, the Buy-side marketplace is the right answer.