New Delhi, Oct. 12 -- The primary market is set for a busy week, with four companies - Bonfiglioli Transmissions, Tonbo Imaging India, Sahajanand Medical Technologies and Zetwerk Manufacturing Business - preparing to launch their initial public offerings (IPOs) on 15 October.

The four IPOs will remain open for subscription until 19 October, while the anchor investor bidding for all four issues is scheduled for 14 October. Investors will have an opportunity to evaluate offerings spanning industrial power transmission, defence electronics, cardiac medical devices and technology-led manufacturing.

Among the four issues, Zetwerk has the largest IPO, worth Rs.5,012 crore, followed by Bonfiglioli Transmissions at Rs.2,534 crore. Tonbo Imaging...