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Leading service provider for Transmission System Operators (TSOs) in the European electricity market.

Through our single trading platform we auction cross-border transmission capacity rights. We also provide accounting (clearing and settlement), contracting, reporting, project support and IT services.

 

Auctions

On behalf of TSOs, we organize long and short-term auctions of transmission capacity rights.

We offer the following products: yearly, seasonal, quarterly, monthly, weekly, daily and intraday.

Auction results Auction calendar
OPS
  • 500+
    Registered market participants
  • 26k+
    Auctions held annually
  • 100%
    Auction tool availability
  • 80+
    Employees
  • 50
    TSOs serviced

Latest market messages

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Capacity Curtailment on the ME-IT border for delivery period 11-06-2026

by JAO

1. TSO(s)*:

CGES

2. Identification of affected Long Term Transmission Rights:

ME-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

11-06-2026 08:00 - 09:00 400 MW

11-06-2026 09:00 - 10:00 400 MW

11-06-2026 10:00 - 11:00 400 MW

11-06-2026 11:00 - 12:00 400 MW

11-06-2026 12:00 - 13:00 400 MW

11-06-2026 13:00 - 14:00 400 MW

11-06-2026 14:00 - 15:00 400 MW

11-06-2026 15:00 - 16:00 400 MW

11-06-2026 16:00 - 17:00 400 MW

11-06-2026 17:00 - 18:00 400 MW

11-06-2026 18:00 - 19:00 400 MW

5. Amount of LTTR remaining after curtailment:

11-06-2026 08:00 - 09:00 286 MW

11-06-2026 09:00 - 10:00 286 MW

11-06-2026 10:00 - 11:00 286 MW

11-06-2026 11:00 - 12:00 286 MW

11-06-2026 12:00 - 13:00 286 MW

11-06-2026 13:00 - 14:00 286 MW

11-06-2026 14:00 - 15:00 286 MW

11-06-2026 15:00 - 16:00 286 MW

11-06-2026 16:00 - 17:00 286 MW

11-06-2026 17:00 - 18:00 286 MW

11-06-2026 18:00 - 19:00 286 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

HVDC Monita

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC

Capacity Curtailment on the IT-ME border for delivery period 11-06-2026

by JAO

1. TSO(s)*:

CGES

2. Identification of affected Long Term Transmission Rights:

IT-ME

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

11-06-2026 08:00 - 09:00 400 MW

11-06-2026 09:00 - 10:00 400 MW

11-06-2026 10:00 - 11:00 400 MW

11-06-2026 11:00 - 12:00 400 MW

11-06-2026 12:00 - 13:00 400 MW

11-06-2026 13:00 - 14:00 400 MW

11-06-2026 14:00 - 15:00 400 MW

11-06-2026 15:00 - 16:00 400 MW

11-06-2026 16:00 - 17:00 400 MW

11-06-2026 17:00 - 18:00 400 MW

11-06-2026 18:00 - 19:00 400 MW

5. Amount of LTTR remaining after curtailment:

11-06-2026 08:00 - 09:00 283 MW

11-06-2026 09:00 - 10:00 283 MW

11-06-2026 10:00 - 11:00 283 MW

11-06-2026 11:00 - 12:00 283 MW

11-06-2026 12:00 - 13:00 283 MW

11-06-2026 13:00 - 14:00 283 MW

11-06-2026 14:00 - 15:00 283 MW

11-06-2026 15:00 - 16:00 283 MW

11-06-2026 16:00 - 17:00 283 MW

11-06-2026 17:00 - 18:00 283 MW

11-06-2026 18:00 - 19:00 283 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

HVDC Monita

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

During the CC process, all the remedial actions provided by the TSOs are already considered by the CCC

Capacity Curtailment on the DK-NL border for delivery period 11-06-2026

by JAO

1. TSO(s)*:
TenneT_NL

2. Identification of affected Long Term Transmission Rights:
DK-NL

3. Triggering event:
Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:
11-06-2026 08:00 - 09:00 199 MW 
11-06-2026 09:00 - 10:00 199 MW 
11-06-2026 10:00 - 11:00 199 MW 
11-06-2026 11:00 - 12:00 199 MW 
11-06-2026 12:00 - 13:00 199 MW 
11-06-2026 13:00 - 14:00 199 MW 
11-06-2026 14:00 - 15:00 199 MW 
11-06-2026 15:00 - 16:00 199 MW 
11-06-2026 16:00 - 17:00 199 MW 
11-06-2026 17:00 - 18:00 199 MW

5. Amount of LTTR remaining after curtailment:
11-06-2026 08:00 - 09:00 0 MW 
11-06-2026 09:00 - 10:00 0 MW 
11-06-2026 10:00 - 11:00 0 MW 
11-06-2026 11:00 - 12:00 0 MW 
11-06-2026 12:00 - 13:00 0 MW 
11-06-2026 13:00 - 14:00 0 MW 
11-06-2026 14:00 - 15:00 0 MW 
11-06-2026 15:00 - 16:00 0 MW 
11-06-2026 16:00 - 17:00 0 MW 
11-06-2026 17:00 - 18:00 0 MW

6.  Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment *:
Expected violation of operational security limits of physical transmission assets.

7.  Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) *?
The remedial actions considered were assessed as not sufficient or ineffective to avoid the expected violation of operational security limit(s).

Market Data API and JAO Website intervention on 11-06-2026 at 17:00 CET

by JAO

Please be informed that a scheduled maintenance will take place on Thursday 11 June 2026, between 17:00 and 19:00 CET.


During this period, the concerned applications are expected to remain available. However, users may experience brief and temporary connection interruptions, lasting only a few seconds.


Only Market Data API and JAO Website may be affected; no action is required from your side.


We appreciate your understanding as we work to enhance our services.


Kind regards,

Jao operations

Capacity Curtailment on the IT-GR border for delivery period 10-06-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

10-06-2026 00:00 - 01:00 250 MW

10-06-2026 01:00 - 02:00 250 MW

10-06-2026 02:00 - 03:00 250 MW

10-06-2026 03:00 - 04:00 250 MW

10-06-2026 04:00 - 05:00 250 MW

10-06-2026 05:00 - 06:00 250 MW

10-06-2026 06:00 - 07:00 250 MW

10-06-2026 07:00 - 08:00 250 MW

10-06-2026 08:00 - 09:00 250 MW

10-06-2026 09:00 - 10:00 250 MW

10-06-2026 10:00 - 11:00 250 MW

10-06-2026 11:00 - 12:00 250 MW

10-06-2026 12:00 - 13:00 250 MW

10-06-2026 13:00 - 14:00 250 MW

10-06-2026 14:00 - 15:00 250 MW

5. Amount of LTTR remaining after curtailment:

10-06-2026 00:00 - 01:00 43 MW

10-06-2026 01:00 - 02:00 43 MW

10-06-2026 02:00 - 03:00 43 MW

10-06-2026 03:00 - 04:00 43 MW

10-06-2026 04:00 - 05:00 43 MW

10-06-2026 05:00 - 06:00 43 MW

10-06-2026 06:00 - 07:00 43 MW

10-06-2026 07:00 - 08:00 43 MW

10-06-2026 08:00 - 09:00 43 MW

10-06-2026 09:00 - 10:00 43 MW

10-06-2026 10:00 - 11:00 43 MW

10-06-2026 11:00 - 12:00 43 MW

10-06-2026 12:00 - 13:00 43 MW

10-06-2026 13:00 - 14:00 43 MW

10-06-2026 14:00 - 15:00 43 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Capacity Curtailment on the GR-IT border for delivery period 10-06-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

GR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

10-06-2026 00:00 - 01:00 250 MW

10-06-2026 01:00 - 02:00 250 MW

10-06-2026 02:00 - 03:00 250 MW

10-06-2026 03:00 - 04:00 250 MW

10-06-2026 04:00 - 05:00 250 MW

10-06-2026 05:00 - 06:00 250 MW

10-06-2026 06:00 - 07:00 250 MW

10-06-2026 07:00 - 08:00 250 MW

10-06-2026 08:00 - 09:00 250 MW

10-06-2026 09:00 - 10:00 250 MW

10-06-2026 10:00 - 11:00 250 MW

10-06-2026 11:00 - 12:00 250 MW

10-06-2026 12:00 - 13:00 250 MW

10-06-2026 13:00 - 14:00 250 MW

10-06-2026 14:00 - 15:00 250 MW

5. Amount of LTTR remaining after curtailment:

10-06-2026 00:00 - 01:00 43 MW

10-06-2026 01:00 - 02:00 43 MW

10-06-2026 02:00 - 03:00 43 MW

10-06-2026 03:00 - 04:00 43 MW

10-06-2026 04:00 - 05:00 43 MW

10-06-2026 05:00 - 06:00 43 MW

10-06-2026 06:00 - 07:00 43 MW

10-06-2026 07:00 - 08:00 43 MW

10-06-2026 08:00 - 09:00 43 MW

10-06-2026 09:00 - 10:00 43 MW

10-06-2026 10:00 - 11:00 43 MW

10-06-2026 11:00 - 12:00 43 MW

10-06-2026 12:00 - 13:00 43 MW

10-06-2026 13:00 - 14:00 43 MW

10-06-2026 14:00 - 15:00 43 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment*:

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s)*?

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

UPDATE: Capacity Curtailment on the ME-IT border for delivery period 10-06-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

ME-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:

10-06-2026 08:00 - 09:00 400 MW

10-06-2026 09:00 - 10:00 400 MW

10-06-2026 10:00 - 11:00 400 MW

10-06-2026 11:00 - 12:00 400 MW

10-06-2026 12:00 - 13:00 400 MW

10-06-2026 13:00 - 14:00 400 MW

10-06-2026 14:00 - 15:00 400 MW

10-06-2026 15:00 - 16:00 400 MW

10-06-2026 16:00 - 17:00 400 MW

10-06-2026 17:00 - 18:00 400 MW

10-06-2026 18:00 - 19:00 400 MW

5. Amount of LTTR remaining after curtailment:

10-06-2026 08:00 - 09:00 192 MW

10-06-2026 09:00 - 10:00 192 MW

10-06-2026 10:00 - 11:00 192 MW

10-06-2026 11:00 - 12:00 192 MW

10-06-2026 12:00 - 13:00 192 MW

10-06-2026 13:00 - 14:00 192 MW

10-06-2026 14:00 - 15:00 192 MW

10-06-2026 15:00 - 16:00 192 MW

10-06-2026 16:00 - 17:00 192 MW

10-06-2026 17:00 - 18:00 192 MW

10-06-2026 18:00 - 19:00 192 MW

6. Information on exact operational security limit(s) that are expected to be violated in the absence of curtailment *:

HVDC Monita

7. Why alternative measures are not sufficient to avoid the expected violation of operational security limit(s) *?

During the CC process, all the remedial actions provided by the TSOs are already considered.

 

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Resource Center

This section contains key information for market participants such as user guides, forms, auction rules, nomination deadlines and other documents.

Go to resources

Our certifications

JAO has successfully implemented internationally recognized management systems and is now officially certified for ISO/IEC 27001:2022 – the global standard for Information Security Management Systems and for ISO 9001 – the international standard for Quality Management Systems. 

ISO
IT

About us

We started as a shared auction platform for transmission capacity across Central Western Europe in 2008. Over time, we became the operator of the Single Allocation Platform and therefore the leading trading platform for European Transmission System Operators.

Get to know us

Register your company

We created a user guide to support the onboarding of market participants. Learn more about the steps to register, the required documents and our service desk platform.

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Frequently asked questions

Check out the common questions and our answers on how to use the auction platform.

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