# Exchange Number > Exchange Number means the count of securities or units to be received by a holder upon execution of a right, warrant, or subscription receipt. **Term:** Exchange Number **Last updated:** 2026-07-29 ## Definition ## What Exchange Number Means in a Contract In a contract, the Exchange Number identifies precisely how many securities or units a holder will receive when they exercise an underlying right, warrant, or subscription receipt. It is the operative figure that turns a contingent entitlement into an actual allotment of shares or units, and it sits at the heart of any instrument that grants a future right to acquire securities rather than an immediate transfer of ownership. Without a clearly stated Exchange Number, a right or warrant would be an empty promise, since the holder and issuer would have no shared understanding of what quantity of securities is actually being exchanged. This makes the term functionally similar to a conversion ratio in convertible instruments, though it is most commonly associated with rights, warrants, and subscription receipts rather than debt-to-equity conversions. The Exchange Number can be a simple fixed integer, such as one share per warrant, or it can be the product of a more complex formula tied to market price, adjustment events, or a subscription price stated elsewhere in the agreement. Regardless of the method, the contract must make the resulting figure ascertainable at the time of exercise. ## How Exchange Number Is Defined or Measured Most agreements define the Exchange Number either as a static ratio, for example one unit of the underlying security for each right or warrant held, or as a variable figure derived from a formula. Formula-based Exchange Numbers often reference a subscription price, a reference market price, or an adjustment mechanism designed to account for stock splits, consolidations, dividends, or other capital events that occur between issuance and exercise. Where the Exchange Number is variable, the contract typically sets out a calculation methodology and identifies who is responsible for performing and certifying the calculation, often the issuer or its transfer agent. Some agreements also specify rounding conventions, since a formula-based calculation can produce a fractional result that must be rounded up, rounded down, or settled in cash for the fractional portion. - Fixed Exchange Number: a set quantity stated in the instrument itself. - Formula-based Exchange Number: calculated by reference to price, ratio, or adjustment events. - Adjusted Exchange Number: recalculated following specified corporate actions. ## Where Exchange Number Appears in Agreements The term appears most frequently in instruments that grant a future right to acquire securities. It is a defined term in many warrant instruments and appears throughout a