Open Mainboard IPO
Currently open Mainboard IPO with live GMP & subscription data
View all Mainboard IPO currently open for subscription. Mainboard IPO are listed on BSE and NSE with larger issue sizes and institutional participation. Track live GMP, real-time QIB/NII/Retail subscription multiples, and apply via your broker.
| Company | Price Band | Open | Close | Listing | GMP | Sub |
|---|---|---|---|---|---|---|
|
Open Mainboard Closing in --:--:--
₹88–93
· Aug 18 – Aug 20
|
₹88 – 93 | Aug 18 | Aug 20 | Aug 25 | +2 (+2.2%) | 1.67x |
|
Open Mainboard Closing in --:--:--
₹342–360
· Aug 18 – Aug 20
|
₹342 – 360 | Aug 18 | Aug 20 | Aug 25 | +78 (+21.7%) | 61.62x |
|
Open Mainboard
₹152–160
· Aug 19 – Aug 21
|
₹152 – 160 | Aug 19 | Aug 21 | Aug 26 | +21 (+13.1%) | 1.89x |
|
Open Mainboard
₹285–300
· Aug 20 – Aug 24
|
₹285 – 300 | Aug 20 | Aug 24 | Aug 28 | +232 (+77.3%) | 4.23x |
Mainboard Issues Open Today — 20 August 2026
As of 20 August 2026, 4 issues are open for subscription. 2 of them close today at 5:00 PM IST. Demand across the open book is uneven: Sunshine Pictures is at 61.62x while Shankesh Jewellers is at 1.67x.
- Shankesh Jewellers — Mainboard, ₹88–93, closing today at 5:00 PM IST. Subscribed 1.67x overall — QIB 1.03x, NII 2.08x, retail 1.87x. Highest category multiple: NII at 2.08x. Grey market premium ₹2 (2.2%).
- Sunshine Pictures — Mainboard, ₹342–360, closing today at 5:00 PM IST. Subscribed 61.62x overall — QIB 26.04x, NII 148.45x, retail 44.73x. Highest category multiple: NII at 148.45x. Grey market premium ₹78 (21.7%).
- Gaja Alternative Asset Management — Mainboard, ₹152–160, closing tomorrow. Subscribed 1.89x overall — QIB 0.09x, NII 2.75x, retail 2.55x. Highest category multiple: NII at 2.75x. Grey market premium ₹21 (13.1%).
- Tempsens Instruments India — Mainboard, ₹285–300, 4 days left, to 24 August. Subscribed 4.23x overall — QIB 0.03x, NII 8.46x, retail 4.8x. Highest category multiple: NII at 8.46x. Grey market premium ₹232 (77.3%).
Subscription multiples are taken from the exchange bidding feed and move through the day; grey market premiums are unofficial dealer quotes, not exchange prices, and carry no settlement guarantee. What GMP does and does not tell you →
Bidding on an Open Mainboard IPO
Mainboard book-building is the more forgiving of the two regimes, and the category structure works in a retail applicant's favour — provided you understand which pool you are actually competing in.
- Use the cut-off price option. Still available for Mainboard book-built issues, it bids automatically at the final issue price, so your application cannot be excluded for having named a number below the discovered price.
- Retail is reserved and small. SEBI's profitability route sets a minimum 35% retail reservation against a maximum 50% for QIB and minimum 15% for NII, with the retail application at roughly Rs 14,000–16,000. Allotment inside retail is a draw of lots at one lot per applicant, so a larger retail bid does not improve your odds.
- Know which NII pool you are in. Rs 2–10 lakh is small NII, above Rs 10 lakh is big NII, and they are closed pools that compete only against themselves. Both allot by draw of lots at the minimum NII lot — proportionate NII allotment ended in 2022.
- Above Rs 5 lakh, use ASBA. The UPI ceiling makes bank-block the only route for big NII applications.
- The anchor book is already public. Anchors are allocated one working day before the issue opens, so you can read the institutional list before committing. QIB is allotted proportionately, not by lottery.
Watch the QIB multiple build over the final day — it is the most reliable in-window signal of institutional conviction. More on anchor investors →
IPO investing carries risk of capital loss, allotment is not guaranteed, and grey market premium is an unofficial signal rather than a prediction. Nothing here is investment advice — read the offer document and consult a SEBI-registered adviser before committing capital.
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