As per Sebi's regulations, the proposed deal as such need approval from majority of public shareholders in the two listed companies -- ACC and Ambuja Cements-- as the transaction involves their promoters.
Besides, the deal also need to be scrutinised by the stock exchanges and Sebi before its culmination.
However, Sebi has begun a early scrutiny as a number of complaints have been received from various entities including some investor associations and institutional investors, sources said.
Ambuja shares have fallen seven per cent to Rs 177 level since the deal was announced while ACC has plunged 3.5 per cent to Rs 1,190.
Holcim last month, announced that it would merge holding firm Holcim India with Ambuja Cements in a cash and share deal to restructure India operations in a two-step process estimated to be about Rs 14,500 crore (Rs 145 billion).
Besides, as part of the process, Holcim India's over 50
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