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The Thapar group was started by Karam Chand Thapar. Karam Chand Thapar died in 1963, and his third son L.M. Thapar took over the group, which then included the Oriental Bank of Commerce, as well as Oriental Insurance. Both these companies later got nationalised. Other Thapar group companies and concerns in India are, or were, The Pioneer, Thapar House on Janpath Lane, Tiger Bay Restaurant, Global Green, Crompton Greaves, Greaves Cotton and JCT group, BILT and KCT Bros.
JCT is now with MM Thapar. His son Samir Thapar runs JCT Mills and his son Arjun Thapar runs JCT electronics.
Crompton Greaves, BILT Chemicals and Bharat Starch was vested with BM Thapar and hence would be under his sons Gautam and Karan Thapar's control. Gautam was named by L.M. Thapar as the successor of his group of companies, including BILT.
His brother Gautam Thapar, formed Avantha Group.
IM Thapar's son Vikram Thapar and grandson Varun Thapar look after his group which includes KCT Coal Sales, the Calcutta-based coal trading business. Vikram Thapar's daughter Ayesha Thapar looks after ICPL. Vikram M. Thapar started Waterbase Ltd in the 90s with primary business of aquaculture including prawn farms for prawn exports as well as the Tiger Bay restaurant chain.
After L. M Thapar's death in 2007, his nephew Gautam Thapar (son of BM Thapar and grandson of Karam Chand Thapar) has taken the reins of BILT, which is the flagship company of the group. The company has recently[when?] come out of a slump in the industry.
The following companies are or have been a part of the group: Ballarpur Industries Limited, BILT Paper Holdings Limited, Orient Engineering and Commercial Company Limited, The Pioneer, Sohna Stud Farm Pvt Limited, TT & G Trading Pvt Limited, iBilt Technologies Limited, Built Middle East Pvt Limited, Himalayan Hideaways Pvt Limited, Karam Chand Thapar & Bros Limited, Lavasa Corporation Limited and KCT Papers Limited are some of the Thapar group companies. Other Thapar group companies and concerns in India are Thapar house on Janpath lane, Tiger Bay restaurant, Global Green. The Crompton Greaves, Greaves Cotton and JCT group is with MM Thapar. His son Samir Thapar runs JCT Mills and JCT Limited. Son Arjun Thapar runs JCT electronics. Built Chemicals and Bharat Starch was vested with BM Thapar and hence would be under his sons Gautam and Karan Thapar's control. Gautam has also been named by L.M. Thapar as the successor of his group of companies. IM Thapar's son Vikram Thapar looks after his group which includes the Calcutta-based coal trading business K. C Thapar started out with and prawn farms for prawn exports as well as the Tiger Bay restaurant chain.