The BSE will ’compulsorily’ delist 200 firms this week and bar their promoters from the markets for 10 years as trading in these shares have remained suspended for over a decade. All these companies will be delisted from August 23.

The move also comes at a time when authorities are clamping down on shell companies — listed as well as unlisted — for allegedly being used as conduits for illicit fund flows. Among the firms to be delisted are Eupharma Laboratories, Athena Financial Services, Magnus Rubber Industries, Rajasthan Polyesters, Transpower Engineering, Dupont Sportswear, Dynavox Industries and GDR Media.