Reviewed by BuyUnlistedShares Research Desk.
On September 3, 2026, the Supreme Court disposed of a set of petitions filed by SEBI against the National Stock Exchange (NSE).
The case involved two long-running disputes: the co-location matter and the dark fibre matter. A bench of Justices J.B. Pardiwala and K. Vinod Chandran closed the appeals after taking note of a settlement between SEBI and NSE. This closes one of the most closely watched regulatory overhangs on India's largest stock exchange — right as NSE moves toward its long-awaited IPO.
What Were the Co-Location and Dark Fibre Cases About?
Both cases date back to allegations first raised years ago about unfair trading advantages at NSE.
- Co-location case: Certain stockbrokers were alleged to have received preferential, early access to NSE's trading systems through its co-location facility, potentially letting them trade ahead of other market participants.
- Dark fibre case: Certain trading members were allegedly given preferential point-to-point network connectivity through an unauthorised service provider, offering a speed/latency advantage over other traders.
In April 2019, a SEBI Whole-Time Member passed orders in both matters:
• The co-location order directed NSE to disgorge roughly ₹624.89 crore, along with interest, and included non-monetary directions.
• The dark fibre order directed NSE to disgorge roughly ₹62.58 crore, along with interest, and mandated periodic network audits.
• A further ₹7 crore penalty was added in the dark fibre matter through a separate adjudication order in June 2022.
NSE challenged these orders. The Securities Appellate Tribunal (SAT) set aside both SEBI orders, after which SEBI approached the Supreme Court to challenge SAT's rulings — keeping the matter in litigation for years.
How the Settlement Came Together
Rather than litigate the Supreme Court appeals to a final verdict, NSE pursued a settlement route with SEBI. The numbers evolved over time:
- June 2025: NSE first offered to pay approximately ₹1,388 crore to settle both matters — at the time, the largest-ever settlement proposal made to SEBI.
- January 2026: SEBI's chairman confirmed the regulator had, in principle, agreed to the settlement, with the proposal under review by SEBI's internal committees.
- The settlement amount was later revised, with the co-location component at roughly ₹1,223.56 crore and the dark fibre component at roughly ₹267.65 crore — taking the total to about ₹1,491.21 crore.
- July 2026: NSE paid ₹714.74 crore in cash toward the settlement, after ₹776.47 crore had already been deposited with SEBI earlier — together covering the full settlement amount.
- September 3, 2026: With the settlement completed, the Supreme Court disposed of SEBI's pending appeals against NSE in both cases.
NSE has stated that the full financial impact of the settlement was already provided for in its FY26 financial statements, meaning this was not an unexpected hit to its books at the time of payment.
Why This Matters for NSE's IPO
NSE has been trying to go public for years, with governance concerns and unresolved regulatory cases repeatedly cited as hurdles.
• NSE filed its draft IPO papers (DRHP) with SEBI in June 2026.
• The proposed issue is entirely an Offer for Sale (OFS) of about 14.89 crore equity shares by existing shareholders — roughly 6% of NSE's equity capital — meaning no fresh capital is being raised by the company itself.
• At the time of the DRHP filing, the co-location and dark fibre cases were still listed as pending, unresolved litigation in the IPO's material litigation section.
• With the settlement completed and the Supreme Court appeals now disposed of, one of the largest disclosed legal overhangs from the DRHP has been cleared.
This doesn't automatically mean the IPO is imminent, but it does remove a major item that regulators, underwriters and investors were watching closely.
What This Doesn't Mean
A few clarifications are worth keeping in mind:
• A settlement is not a finding of guilt or innocence — under SEBI's settlement framework, cases are resolved without either side making formal admissions on the merits.
• The Supreme Court's disposal of the appeals reflects that the underlying dispute has been resolved between the parties — it is not a fresh ruling on who was right in the original 2019 orders.
• Other steps in NSE's IPO process — such as final SEBI observations on the DRHP and market conditions — still need to play out before any listing timeline is confirmed.
A Quick Timeline
• 2019: SEBI's Whole-Time Member passes disgorgement orders in both the co-location and dark fibre matters.
• SAT sets aside both orders; SEBI appeals to the Supreme Court.
• June 2025: NSE submits a settlement proposal of about ₹1,388 crore.
• January 2026: SEBI agrees to the settlement in principle.
• June 2026: NSE files its DRHP, still listing both cases as pending litigation.
• July 2026: NSE pays ₹714.74 crore in cash, completing the ₹1,491.21-crore settlement.
• September 3, 2026: The Supreme Court disposes of SEBI's appeals against NSE.
Key Takeaways
• A long-running, high-profile SEBI-NSE legal dispute has formally ended through settlement rather than a final court verdict.
• The total settlement, at about ₹1,491 crore, is the largest ever agreed with SEBI.
• The financial impact was already accounted for in NSE's FY26 books, and the case's closure removes a disclosed legal overhang from its IPO filing.
• The IPO itself is a pure Offer for Sale by existing shareholders, so this development affects regulatory clarity around the listing, not fresh capital raised by NSE.
Frequently Asked Questions
1. What did the Supreme Court actually decide on September 3, 2026?
It disposed of (closed) SEBI's pending appeals against NSE in the co-location and dark fibre cases, after taking note of the settlement reached between the two parties.
2. What were the co-location and dark fibre cases about?
Both involved allegations that certain stockbrokers got preferential, faster access to NSE's trading systems or network — through its co-location facility in one case, and an unauthorised network connection in the other — potentially letting them trade ahead of others.
3. How much did NSE agree to pay to settle these cases?
Approximately ₹1,491.21 crore in total — about ₹1,223.56 crore for the co-location matter and ₹267.65 crore for the dark fibre matter.
4. Has NSE already paid this amount?
Yes. NSE paid ₹714.74 crore in cash in July 2026, in addition to ₹776.47 crore already deposited with SEBI earlier, completing the full settlement.
5. Does this settlement mean NSE was found guilty?
No. A regulatory settlement resolves a dispute without either side making formal admissions on the merits of the original allegations.
6. How does this affect NSE's IPO?
It removes a major pending-litigation item that was disclosed in NSE's draft IPO papers (DRHP), clearing a regulatory overhang ahead of the exchange's planned listing.
7. Is NSE raising fresh capital through this IPO?
No. As disclosed in the DRHP, the proposed issue is entirely an Offer for Sale of about 14.89 crore shares by existing shareholders — no new shares are being issued by NSE itself.
8. Did the settlement financially surprise NSE?
No. NSE stated that the full financial impact of the settlement had already been provided for in its FY26 financial statements.
9. Are there any other pending regulatory issues for NSE's IPO?
The DRHP process, including SEBI's final observations and prevailing market conditions, still needs to be completed before a listing timeline is confirmed.
10. Is this article investment advice?
No. It's a factual explainer based on public news and filings, not a recommendation to buy, sell, or hold any security.
Disclaimer:
This is written for educational and informational purposes only. Nothing here constitutes investment advice or a recommendation to buy or sell securities. All data is sourced from publicly available information. Investments in securities markets are subject to market risks — please read all offer documents carefully before investing.