Bengaluru, July 10 -- Contract manufacturing platform Zetwerk and defence imaging company Tonbo Imaging have received approval from the Securities and Exchange Board of India (Sebi) to launch their public offerings.

Zetwerk received observations from Sebi on 9 July and Tonbo Imaging on 6 July, according to the regulator's processing status update. The former filed with the regulator in March, while the latter submitted IPO documents in December 2025.

With observations in hand, Zetwerk has an 18-month window to go public, given that it filed its IPO papers confidentially. Tonbo Imaging, on the other hand, must list within the next 12 months.

Tonbo Imaging has filed only for an offer-for-sale listing. Its investors are expected to offloa...