Mainboard IPO GMP Today: Complete List of Current & Upcoming IPOs (September 2026)
By Kaushik Brahmakshatriya
Published on 18 September 2026.
IPO GMP
The Indian primary market is buzzing this September, and investors everywhere are searching for one thing: IPO GMP updates before applying. Whether you’re eyeing the mega NSE listing or a smaller SME offer, grey market premium gives you a quick sense of listing-day sentiment. In this guide, we break down every active and upcoming mainboard IPO along with their IPO GMP, price bands, and key dates — in simple, easy language so you don’t need to be a finance expert to understand where the market is heading right now.
Current Mainboard IPOs Making Noise
Two big names are dominating headlines this week. National Stock Exchange of India Ltd (NSE) opened its much-awaited issue on September 17 with a price band of ₹1,700–₹1,785, and it’s entirely an offer-for-sale worth over ₹22,500 crore — India’s second-largest IPO ever after Hyundai Motor India. Right behind it is Hero Motors, an auto-component arm of the Hero Group, with a ₹1,000 crore issue priced at ₹79–₹84 per share, closing September 18.Table below shows the latest IPO GMP snapshot for these mainboard names:
| Company | Price Band (₹) | Issue Size | Close Date | GMP (₹) |
| NSE Ltd | 1,700–1,785 | ₹22,569 Cr | 21 Sep 2026 | 142 (+8%) |
| Hero Motors Ltd | 79–84 | ₹1,000 Cr | 18 Sep 2026 | Tracking live |
Note : Remember, grey market premium is unofficial and can swing sharply in either direction before listing day, so treat it as a sentiment gauge, not a guarantee.
SME IPOs With Strong Grey Market Buzz
While mainboard issues grab the spotlight, several SME IPOs are quietly generating even stronger IPO GMP percentages this week. Jindal Supreme (India), SS Retail, and SpectraA Technology Solutions currently sit at the top of the grey market leaderboard, each showing double-digit premium gains over their issue price. SME IPOs tend to be riskier due to lower liquidity, but the premiums show retail appetite remains high heading into the festive season.
| IPO | GMP (₹) | GMP % |
| Jindal Supreme (India) (Main Board ) | ₹28 | +30.11% |
| SS Retail (Main Board ) | ₹127 | +29.95% |
| SpectraA Technology Solutions (SME IPO) | ₹30 | +25.42% |
How to Read GMP Before Applying
New investors often ask, “should I trust the IPO GMP number blindly?” The honest answer is no. GMP is collected informally from grey market dealers and can change every few hours based on subscription numbers, anchor investor response, and overall market mood. A GMP above 20% generally signals strong demand, 10–20% is moderate, and anything below 10% or negative suggests the market isn’t too excited. Always cross-check subscription data (QIB, NII, retail) alongside GMP, and read the RHP before applying — GMP alone should never decide your investment.
Conclusion
This September is shaping up to be one of the busiest IPO months of the year, with NSE’s historic listing headlining a packed mainboard and SME calendar. Tracking IPO GMP daily gives you a quick pulse check, but real investment decisions should combine fundamentals, subscription trends, and your own risk appetite — not grey market chatter alone.
FAQs ( Frequently Asked Questions )
Q1. What does IPO GMP mean?
It’s the unofficial premium at which IPO shares trade in the grey market before listing.
Q2. Is GMP a guarantee of listing gains?
No, it’s an informal indicator and can differ significantly from actual listing price.
Q3. Which IPO is open right now?
Hero Motors closes September 18; NSE closes September 21, 2026.
Q4. Are SME IPO GMPs reliable?
They’re even more volatile than mainboard GMPs due to low liquidity — use with caution.
Disclaimer:
This article is for informational purposes only and does not constitute investment advice. GMP figures are unofficial, unregulated, and subject to change. Please consult a registered financial advisor and read the RHP before investing in any IPO.
