A Stock Sale Agreement is a legal document that outlines the terms of a sale of stocks. It is a contract between a seller and a buyer which sets out the rights and responsibilities of each party in regard to the transfer of stocks. This document includes details such as the number of stocks to be sold, the purchase price, and the delivery date. The main types of Stock Sale Agreement are open market sales, private placements, and block sales. An open market sale is a transaction that occurs on a public stock exchange such as the New York Stock Exchange (NYSE). A private placement is a type of transaction where stocks are sold directly to investors, such as private equity firms, without being traded on the stock exchange. A block sale is a large sale of stocks in a single transaction, usually by a large stockholder or institution.