Liquidating any stock holding, particularly a large stock portfolio, is a serious undertaking.
The liquidation of a large portfolio is tricky and errors in judgment can happen.
There are two kinds of stock portfolio liquidation: small portfolio and large portfolio.
You can place orders with your stockbroker to sell each individual position if you are liquidating a small portfolio of stocks.
Liquidating a large portfolio or holdings of significant amounts concentrated in single stocks is a complex task that requires special professional services of a brokerage or investment advisory firm.