A pre-emption right, right of pre-emption, or first option to buy is a contractual right to acquire certain property newly coming into existence before it can be offered to any other person or entity. It comes from the Latin verb emo, emere, emi, emptum, to buy or purchase, plus the inseparable preposition pre, before. A right to acquire existing property in preference to any other person is usually referred to as a right of first refusal.whereas the difficulty of agreeing on precise cases in which alone provisions and other articles not generally contraband may be regarded as such, renders it expedient to provide against the inconveniences and misunderstandings which might thence arise. It is further agreed that whenever any such articles so being contraband according to the existing laws of nations, shall for that reason be seized, the same shall not be confiscated, but the owners thereof shall be speedily and completely indemnified; and the captors, or in their default-the government under whose authority they act, shall pay to the masters or owners of such vessel the full value of all articles, with a reasonable mercantile profit thereon, together with the freight, and also the damages incident to such detention. A pre-emption right, right of pre-emption, or first option to buy is a contractual right to acquire certain property newly coming into existence before it can be offered to any other person or entity. It comes from the Latin verb emo, emere, emi, emptum, to buy or purchase, plus the inseparable preposition pre, before. A right to acquire existing property in preference to any other person is usually referred to as a right of first refusal. In practice, the most common form of pre-emption right is the right of existing shareholders to acquire new shares issued by a company in a rights issue, a usually but not always public offering. In this context, the pre-emptive right is also called subscription right or subscription privilege. This is the right, but not the obligation, of existing shareholders to buy the new shares before they are offered to the public. In this way, existing shareholders can maintain their proportional ownership of the company, preventing stock dilution. In many jurisdictions, subscription rights are automatically provided for by statute, for example the UK, but in other jurisdictions it only arises if provided for under the constitutional documents of the relevant company, for example the US. In such countries shareholder rights are often violated leading to proceedings at the Court of Justice of the European Union.