| Year | Established | Activity |
| 1906 | Foundation of Elque & Company | Trading & Finance |
| 1916 | Establishment of Haridass Chunder & Co. | Import & Export Clearing & Forwarding Agents |
| 1965 | Establishment of Sensons Fine Foods | Processing of Mango Chutney and Condiments |
| 1972 | Foundation of Calcutta Seafoods | Processing & Exports of Seafoods |
| 1979 | Foundation of Bay Seafoods Pvt. Ltd. | Processing & Exports of Seafoods |
| 1980 | Purchase of Imperial Fruit Preserving Co. | Processing & Exports of Pickles, Sauces, Chutneys |
| 1987 | Foundation of Plastosen Pvt. Ltd. | Pet Bottles & Packaging |
| 1990 | Foundation of Wonderfood Corporation | Processing & Export of Seafoods in IQF and added- value |
| 1990 | Establishment of Sendan & Company | Bottling of Mineral Water |
| 1992 | Foundation of Sanpo Fisheries Ltd. | Prawn Aquaculture & Hatcheries |
| 1994 | Establishment of Bosen Foods Ltd. | Processing & Export of Seafood with added-value |
| 1994 | Establishment of Bosen Coldstorages Ltd. | Refrigerated Public Warehousing & Transportation |
| 1994 | Foundation of Elque Polyesters Ltd. | PET Resin manufacturer - "SENPET" Brand |
| 1995 | Establishment of Sen Exports | International Trading in PET resins, tea and commodities |
| 1996 | Sen Holdings Pvt. Ltd. | Group Holding Company |
| 1998 | Establishment of Alphapet Ltd., Moscow | Trading in PET resin Russia & CIS countries; PET perform production and trading |
| 1998 | Establishment of Pet Sibir, Novosibirsk | PET perform production facility |