11. RIL-RPL merger: $1.68 billion

Reliance Industries in March 2009 approved a scheme of amalgamation of its subsidiary Reliance Petroleum with the parent company. The all-share merger deal between the two Mukesh Ambani group firms was valued at about Rs 8,500 crore ($1.68 billion).

This makes it India's 11th largest M&A transaction till date.

Post-merger, RPL shareholders received one fully paid equity share of Rs 10 each of the company for every 16 fully paid equity shares of Rs 10 each of RPL held by them.

The RIL-RPL merger swap ratio was at 16:1. The merger became effective from April 1, 2008.