Institutional placement programme limits public shareholding increase and caps allotment on oversubscription to protect public shareholding thresholds. Regulation 91I restricts the aggregate tranches of an IPP by an eligible seller so the increase in public shareholding does not exceed a capped proportion or only rises by the lesser amount needed to reach the prescribed minimum public shareholding; if the issue is oversubscribed, the eligible seller's allotment is limited to a capped portion of the offer size.