Русско-англо-русский юридический словарь

On Friday, March 21st, 2014, L'Oréal and Nestlé signed the share purchase agreement; the completion of the sale is conditional upon the approval of the sale by the competition authorities. (Reuters)

A letter of intent (LOI or LoI, and sometimes capitalized as Letter of Intent in legal writing, but only when referring to a specific document under discussion) is a document outlining an agreement between two or more parties before the agreement is finalized. Such agreements may be Asset Purchase Agreements, Share Purchase Agreements, Joint-Venture Agreements, Lease Agreements, and overall all Agreements which aim at closing a financially large deal. (Wikipedia)

A Share purchase agreement (SPA) is an agreement setting out the terms and conditions relating to the sale and purchase of shares in a company. (Rocket Lawyer)