Shareholding limits in recognised clearing corporations restrict ownership by stock exchanges, residents, and foreign investors under prescribed ceilings. Regulation 18 mandates ownership limits in recognised clearing corporations: a majority stake must be held by recognised stock exchange(s) with a prohibition on any single exchange holding excessive stakes across multiple clearing corporations; resident and non-resident investors are subject to individual caps, specified higher limits apply to certain institutions, aggregate foreign holdings are capped subject to government limits, foreign portfolio investors may buy only on the secondary market, and shareholders exceeding limits at commencement have three years to conform.