IPO GMP Today (15 Oct): Tonbo Imaging at 71% as 5 IPOs Open for Subscription
October 15 is the biggest IPO day of the month so far: five issues open for subscription today, led by Tonbo Imaging, which commands a grey market premium of roughly ₹500 — an unofficial +71% over its ₹700 upper band. HD Fire Protect enters its final bidding day holding a 33% premium, while Bonfiglioli Transmissions opens with a 30% grey-market quote. All GMP figures below are unofficial market-reported numbers, checked across multiple trackers this morning, and can move quickly.
Today's GMP snapshot (morning of 15 October 2026)
| IPO | Upper band (₹) | GMP (₹, unofficial) | Est. listing (₹) | Implied gain | Status |
|---|---|---|---|---|---|
| Tonbo Imaging | 700 | 500 | 1,200 | +71.4% | Opens today |
| HD Fire Protect | 271 | 89 | 360 | +32.8% | Day 3 — closes today |
| Bonfiglioli Transmissions | 586 | 178 | 764 | +30.4% | Opens today |
| Zetwerk | 151 | 22 | 173 | +14.6% | Opens today |
| Sahajanand Medical | 344 | 41 | 385 | +11.9% | Opens today |
| Fusion CX | 289 | 33 | 322 | +11.4% | Day 2 |
| Ravita Engineering (SME) | 112 | 7 | 119 | +6.3% | Day 2 |
| Shellz India (SME) | 179 | 0 | 179 | Flat | Opens today |
| Vaibhav Vyapaar (SME) | 54 | 0 | 54 | Flat | Day 3 — closes today |
| Jio Platforms | 1,119 | 200–220 | 1,319–1,339 | +18–20% | Opens 21 Oct |
GMP = grey market premium. Unofficial, market-reported, subject to change. Estimated listing = upper band + GMP.
Biggest GMP movers this morning
- Tonbo Imaging is the standout — ₹500 GMP puts it far ahead of the pack as the ₹852 crore pure-OFS defence-imaging issue opens today (15–19 Oct). Details in our Tonbo Imaging IPO deep-dive.
- HD Fire Protect holds ~33% going into its final subscription day after a strong Day 2 (16.53x total — NII 48.74x, retail 11.39x, QIB 1.49x, per exchange-reported figures). Full issue recap: HD Fire Protect price band, dates & GMP.
- Bonfiglioli opens at ~30% — the ₹2,533.66 crore pure-OFS gear-maker issue (₹558–586 band, 25-share lot, ₹14,650 minimum) runs 15–19 Oct with a tentative 23 Oct listing. Bonfiglioli Transmissions: dates, GMP & review.
- Zetwerk cools to ~15% — the ₹5,012.33 crore B2B manufacturing IPO (₹143–151 band) opens today after its band announcement earlier this week. Zetwerk IPO price band ₹143–151.
- Sahajanand Medical at ~12% — the ₹475.48 crore pure-OFS cardiac-devices IPO (₹327–344 band, 43-share lot) opens today, 15–19 Oct. Sahajanand Medical IPO deep-dive.
- Jio Platforms GMP steadies at ₹200–220 (~18–20%) after the RHP filing on 14 Oct confirmed the 21–23 Oct dates and ~₹30,213 crore size. Jio IPO RHP filed: dates & size.
Key IPO dates for today (15 October 2026)
| Event | IPO | Details |
|---|---|---|
| Open for subscription | Tonbo Imaging | 15–19 Oct, ₹665–700, 21-share lot, lists 23 Oct (tentative) |
| Open for subscription | Bonfiglioli Transmissions | 15–19 Oct, ₹558–586, 25-share lot, lists 23 Oct (tentative) |
| Open for subscription | Zetwerk | 15–19 Oct, ₹143–151, 99-share lot, lists 23 Oct (tentative) |
| Open for subscription | Sahajanand Medical | 15–19 Oct, ₹327–344, 43-share lot, lists 23 Oct (tentative) |
| Open for subscription (SME) | Shellz India | 15–19 Oct, ₹179 upper band |
| Final bidding day | HD Fire Protect | Closes 15 Oct; allotment 16 Oct, listing 21 Oct (tentative) |
| Final bidding day (SME) | Vaibhav Vyapaar | Closes 15 Oct (₹51–54) |
| Day 2 of bidding | Fusion CX | 14–16 Oct, ₹275–289 |
| Day 2 of bidding (SME) | Ravita Engineering | 14–16 Oct, ₹105–112 |
HD Fire Protect: what to watch on final day
The ₹712.31 crore fire-protection equipment IPO, a 100% promoter offer-for-sale (₹258–271 band), closes bidding today. Day 2 ended at 16.53x overall, with institutional demand led by NII at 48.74x and retail at 11.39x; QIBs were just past full at 1.49x — a number to watch today, since strong QIB interest often decides final-day momentum. The unofficial GMP of ~₹89 points to an estimated ₹360 listing. Allotment is expected on 16 Oct and listing on 21 Oct on NSE and BSE.
How to read today's GMP table
- GMP is sentiment, not a forecast. Tonbo's 71% reflects grey-market enthusiasm, but actual listing depends on subscription quality and market conditions at listing.
- Flat GMPs (Shellz India, Vaibhav Vyapaar) simply mean no meaningful premium is being quoted — common for SME issues, where grey markets are thinner.
- Final-day dynamics for HD Fire Protect: with NII already at 48.74x, the listing-day outcome hinges on whether retail and QIB bids keep building.
FAQs
Which IPO has the highest GMP today (15 Oct 2026)?
Tonbo Imaging leads with an unofficial GMP of ~₹500 (+71.4%) as its IPO opens today, followed by HD Fire Protect (~₹89, +32.8%) and Bonfiglioli Transmissions (~₹178, +30.4%). GMP is unofficial and changes frequently.
Which IPOs open today?
Five IPOs open for subscription on 15 Oct 2026: Tonbo Imaging, Bonfiglioli Transmissions, Zetwerk, Sahajanand Medical (all mainboard, 15–19 Oct) and Shellz India (SME).
Which IPOs close today?
HD Fire Protect (mainboard) and Vaibhav Vyapaar (SME) close bidding today, 15 Oct. HD Fire Protect's allotment is expected on 16 Oct.
Is GMP a reliable indicator of listing price?
No. GMP is an unofficial grey-market quote that reflects current sentiment, not a guarantee. It often directionally matches listing performance but frequently overshoots or undershoots. Always weigh company fundamentals, subscription data and valuation before applying.
Conclusion
October 15 packs the month's heaviest IPO traffic: five new issues open while HD Fire Protect and Vaibhav Vyapaar close. Tonbo Imaging's 71% unofficial premium makes it the grey market's top pick of the day, with Bonfiglioli's 30% debut quote close behind. We'll track final-day subscription numbers for HD Fire Protect and Day 1 figures for the five openers in today's midday update.