Corporate strategies would lead companies to different destinations, companies of different industries may use different strategies to achieve their reason for existence. Irrespective of industries, mergers and acquisitions seem to be the most used strategies in different industries. Pharmaceutical industries in India are not exception for this practices, Sun Pharmaceutical company Ltd since 1996 using these strategies to be the largest pharmaceutical company at global market and its acquisition and join ventures crossed Indian political border too. The study aimed to know the financial synergy after merger and acquisitions of sun pharmaceutical, to know the financial synergy, study took seven years pre- and post- acquisition of 2014 Ranbaxy Company and three pre acquisition and post acquisitions ratios of 2019 Polo Pharma company acquisition. – financial rations of the company. 2014 and 2019 will be the base years. As per the study, to have financial synergy companies may take time, the required time may depend on various factors.