Each share in a limited company has a unique share number. Shares are listed in numerical order in the share ledger, making it possible to trace exactly which shares a given shareholder owns.
Numbering is essential for traceability. In a transfer of shares, a pledge of shares or a split you must identify exactly which shares are affected. A digital share ledger keeps the numbers in order automatically, even after many transactions.

A block of shares is a consecutive series of share numbers held by the same owner with the same history.
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A share is a unit of ownership in a limited company that gives the right to vote and to receive dividends.
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A share ledger is a record of a company's shares and who its shareholders are.
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A shareholder is a person or company that owns one or more shares in a limited company.
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