The matter relates to manipulative activities by way of synchronised trading through connected entities.
In the order, dated June 16, Sebi has directed impounding of alleged unlawful gains to the tune of of Rs 27.44 crore from the 18 entities. The amount includes interest of Rs 8.45 crore for the period from October 1, 2012 to June 15, 2016.
The entities, include Eversight Tradecomm, Beejay Investment & Financial Consultants, Stupendors Traders, Neelanchal Mercantile and Divyadrishti Merchants.
The earlier matter pertained to alleged manipulative trading by certain connected entities, in the scrips of Cals Refineries, Confidence Petroleum India, Bang Overseas, Shree Precoated Steels (now Ajmera Realty & Infra) and Temptation Foods.
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A probe by the Securities and Exchange Board of India (Sebi) found that the entities indulged in manipulative trading activities by transferring funds through connected entities and allegedly made unlawful gains.
Noting that all the six entities are private limited companies, the watchdog said that as directors are responsible for the conduct of such firms, "they are also made liable for the alleged unlawful gains made by Beejay and Eversight".
Hence, Sebi has been asked to conduct a fresh probe into the matter covering other bank accounts that were used for trading by the entities, "which would have been used to aid the debarred entities to trade in the market".