Prostarm Info Systems IPO GMP History
Prostarm Info Systems IPO has been listed on June 3, 2025 at a listing price of ₹120, against the issue price of ₹105 — a gain of ₹15 (+14.29%). The GMP peaked at ₹23 on 26 May 2025 and reached a low of ₹12 on 2 June 2025. The day-wise GMP trend below shows how grey market sentiment evolved from subscription to listing.
Prostarm Info Systems IPO raised ₹168 Cr. through its IPO at a price band of ₹95 to ₹105 per share, with a lot size of 142 shares. The IPO was open for subscription from 27 May 2025 to 29 May 2025.
Researched & reviewed by
Abhishek Vohera,
Founder, IPO Guru
Last updated
Figures sourced from the RHP, BSE & NSE
GMP trend
Grey market premium sampled three times a day (11 AM, 5 PM, 10 PM). Last updated 10 Nov, 1:05 AM IST.
Day-wise GMP
The last reading of each day, newest first. Arrows compare with the previous day.
| Date | GMP | ↑↓ | % | Kostak | Sub. Sauda |
|---|---|---|---|---|---|
| 02 Jun 2025 | ₹ 12 | ▼ | 11% | — | — |
| 01 Jun 2025 | ₹ 16 | — | 15% | — | — |
| 31 May 2025 | ₹ 16 | ▼ | 15% | — | — |
| 29 May 2025 | ₹ 19 | ▼ | 18% | — | — |
| 28 May 2025 | ₹ 22 | ▲ | 21% | — | — |
| 27 May 2025 | ₹ 19 | ▼ | 18% | — | — |
| 26 May 2025 | ₹ 23 | — | 22% | — | — |
Prostarm Info Systems IPO dates
Key dates from opening to listing. Today is 10 November.
- Open 27 May 2025
- Close 29 May 2025
- Allotment 30 May 2025
- Refund/credit 02 Jun 2025
- Listing 03 Jun 2025
Prostarm Info Systems IPO actual listing price
How the grey market's final call compared with the listing-day open.
| Issue price | ₹105 |
|---|---|
| GMP-based estimate (pre-listing) | ₹117 (+11.4%) |
| Listing gain / loss | +₹15 per share |
| Listing date | 03 Jun, 2025 |
| Actual listing price | ₹120 (+14.29%) |
Is Prostarm Info Systems IPO GMP reliable?
Grey market premium for Prostarm Info Systems IPO should be interpreted with caution. The GMP is an unregulated, unofficial market not governed by SEBI. Here's how to read the current signal:
- 01Subscription rate matters: A high GMP paired with strong subscription — especially QIB (Qualified Institutional Buyer) oversubscription — is a more reliable bullish signal than GMP alone. Read our in-depth analysis: GMP vs Subscription Data — Which Predicts Listing Gains Better?
- 02Timing matters: GMP in the first 1–2 days of subscription is less reliable. GMP on the final subscription day and the day before listing tends to be the most accurate predictor.
- 03Grey market is thin: For smaller IPOs, even a handful of large orders can swing the GMP significantly. Treat low-volume GMP signals with extra caution.
- 04Cross-check before acting: Review the Prostarm Info Systems IPO full review for a fundamentals-based assessment before making any grey market trades.
Prostarm Info Systems IPO Kostak rate explained
Two ways the grey market trades an IPO application before listing.
The Kostak rate for Prostarm Info Systems IPO was not available during the subscription period. Kostak is the fixed amount a grey market buyer pays for an IPO application regardless of allotment outcome.
The Subject to Sauda price was not available for this IPO. Subject to Sauda only applies if allotment is confirmed — the buyer pays a premium on top of the issue price per lot allotted.
Grey market trading is unofficial and unregulated by SEBI. Proceed with full awareness of the associated risks.
About Prostarm Info Systems IPO
Prostarm Info Systems Limited was incorporated in January 2008. It began by selling and installing batteries and UPS systems made by others. From 2021 it moved into designing, making and selling its own energy storage and power conditioning equipment.
The products include UPS systems, inverters, solar hybrid inverters, lithium-ion battery packs and voltage stabilisers. The company also sells third-party batteries, handles end-of-life disposal and builds rooftop solar projects on an EPC basis.
Customers come from healthcare, aviation, railways, defence, banking, education, renewable energy, IT and oil and gas.
The IPO was a fresh issue of Rs 168 crore. Rs 72.50 crore was planned for working capital and Rs 17.96 crore for repaying borrowings.
Frequently asked
What is the GMP of Prostarm Info Systems IPO?
The current Grey Market Premium (GMP) of Prostarm Info Systems IPO is ₹ 12.
What is the Kostak Price of Prostarm Info Systems IPO?
Kostak rate is the profit made by selling an IPO application before allotment. The current Kostak rate for Prostarm Info Systems IPO is not available.
What is the Subject to Sauda Price of Prostarm Info Systems IPO?
Subject to Sauda is the premium amount decided if the allotment is confirmed. The current Subject to Sauda rate is not available.
What was the actual listing price of Prostarm Info Systems IPO?
Prostarm Info Systems IPO listed on June 3, 2025 at ₹120, against the issue price of ₹105 — a gain of +14.29%.
How did the GMP of Prostarm Info Systems IPO trend before listing?
The GMP of Prostarm Info Systems IPO was falling in its final days before listing. The GMP peaked at ₹23 on 26 May 2025. View the day-wise table above for the complete GMP history.
Explore Prostarm Info Systems IPO further
The grey market is one signal. Read it alongside the demand, the reviews and the filings before you decide.
It has listed — go back to the fundamentals.
Category-wise demand from QIB, NII and retail investors, updated through the day.
What brokers and analysts are saying about this issue, in one place.
Check with your PAN whether shares were credited to your demat account.
The grey market called it. Now check the fundamentals.
IPO Guru tracks GMP, subscription and allotment for every Mainboard and SME issue. Read the grey market alongside the subscription book and the offer document before you apply.
Not investment advice. Grey market premium is an unofficial, unregulated indicator and is not a forecast.
