The Securities and Exchange Board of India announced changes to delisting regulations on Wednesday. Companies will now have to acquire shares from 25 per cent of the total number of public shareholders, even if the actual stake is low. Experts say this would make it harder for companies with wider public shareholding to push through a delisting offer. Companies with high promoter shareholding or those where management has talked of delisting as an option, corrected on Thursday. Only three of 10 such companies that Business Standard looked at showed gains. Six declined and one remained unchanged