Small company definition limits paid-up capital and turnover for private companies, with exclusions for holding, not-for-profit, and special Act entities. A small company is defined for non-public entities by two conjunctive monetary ceilings: a limit on paid-up share capital and a limit on turnover for the immediately preceding financial year, each subject to prescribed upward revision within capped maximums. The definition excludes holding and subsidiary companies, not-for-profit companies, and companies or bodies corporate governed by any special Act.