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Annual Report

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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.

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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 NSL-GB-N2 border for delivery period 09-11-2026

by JAO

1. TSO(s)*:

NGNSL_IC

2. Identification of affected Long Term Transmission Rights:

NSL-GB-N2

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-11-2026 16:00 - 17:00 98 MW

09-11-2026 17:00 - 18:00 98 MW

09-11-2026 18:00 - 19:00 98 MW

09-11-2026 19:00 - 20:00 98 MW

09-11-2026 20:00 - 21:00 98 MW

09-11-2026 21:00 - 22:00 98 MW

5. Amount of LTTR remaining after curtailment:

09-11-2026 16:00 - 17:00 0 MW

09-11-2026 17:00 - 18:00 0 MW

09-11-2026 18:00 - 19:00 0 MW

09-11-2026 19:00 - 20:00 0 MW

09-11-2026 20:00 - 21:00 0 MW

09-11-2026 21:00 - 22:00 0 MW

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

Thermal Limits

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

Capacity limitation due to NTC restrictions

Capacity Curtailment on the IT-CH border for delivery period 09-11-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-11-2026 14:00 - 15:00 927 MW

09-11-2026 15:00 - 16:00 927 MW

09-11-2026 16:00 - 17:00 927 MW

09-11-2026 17:00 - 18:00 927 MW

09-11-2026 18:00 - 19:00 927 MW

09-11-2026 19:00 - 20:00 927 MW

09-11-2026 20:00 - 21:00 927 MW

5. Amount of LTTR remaining after curtailment:

09-11-2026 14:00 - 15:00 590 MW

09-11-2026 15:00 - 16:00 0 MW

09-11-2026 16:00 - 17:00 0 MW

09-11-2026 17:00 - 18:00 0 MW

09-11-2026 18:00 - 19:00 0 MW

09-11-2026 19:00 - 20:00 590 MW

09-11-2026 20:00 - 21:00 801 MW

Capacity Curtailment on the IT-FR border for delivery period 09-11-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-11-2026 14:00 - 15:00 1234 MW

09-11-2026 15:00 - 16:00 1234 MW

09-11-2026 16:00 - 17:00 1234 MW

09-11-2026 17:00 - 18:00 1234 MW

09-11-2026 18:00 - 19:00 1234 MW

09-11-2026 19:00 - 20:00 1234 MW

09-11-2026 20:00 - 21:00 1234 MW

09-11-2026 21:00 - 22:00 1234 MW

5. Amount of LTTR remaining after curtailment:

09-11-2026 14:00 - 15:00 659 MW

09-11-2026 15:00 - 16:00 0 MW

09-11-2026 16:00 - 17:00 0 MW

09-11-2026 17:00 - 18:00 0 MW

09-11-2026 18:00 - 19:00 0 MW

09-11-2026 19:00 - 20:00 648 MW

09-11-2026 20:00 - 21:00 648 MW

09-11-2026 21:00 - 22:00 1047 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 IT-GR border for delivery period 09-11-2026

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:

09-11-2026 00:00 - 01:00 500 MW

09-11-2026 01:00 - 02:00 500 MW

09-11-2026 02:00 - 03:00 500 MW

09-11-2026 03:00 - 04:00 500 MW

09-11-2026 04:00 - 05:00 500 MW

09-11-2026 05:00 - 06:00 500 MW

09-11-2026 06:00 - 07:00 500 MW

09-11-2026 07:00 - 08:00 500 MW

09-11-2026 08:00 - 09:00 500 MW

09-11-2026 09:00 - 10:00 500 MW

09-11-2026 10:00 - 11:00 500 MW

09-11-2026 11:00 - 12:00 500 MW

09-11-2026 12:00 - 13:00 500 MW

09-11-2026 13:00 - 14:00 500 MW

09-11-2026 14:00 - 15:00 500 MW

09-11-2026 15:00 - 16:00 500 MW

09-11-2026 16:00 - 17:00 500 MW

09-11-2026 17:00 - 18:00 500 MW

09-11-2026 18:00 - 19:00 500 MW

09-11-2026 19:00 - 20:00 500 MW

09-11-2026 20:00 - 21:00 500 MW

09-11-2026 21:00 - 22:00 500 MW

09-11-2026 22:00 - 23:00 500 MW

09-11-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

09-11-2026 00:00 - 01:00 0 MW

09-11-2026 01:00 - 02:00 0 MW

09-11-2026 02:00 - 03:00 0 MW

09-11-2026 03:00 - 04:00 0 MW

09-11-2026 04:00 - 05:00 0 MW

09-11-2026 05:00 - 06:00 0 MW

09-11-2026 06:00 - 07:00 0 MW

09-11-2026 07:00 - 08:00 0 MW

09-11-2026 08:00 - 09:00 0 MW

09-11-2026 09:00 - 10:00 0 MW

09-11-2026 10:00 - 11:00 0 MW

09-11-2026 11:00 - 12:00 0 MW

09-11-2026 12:00 - 13:00 0 MW

09-11-2026 13:00 - 14:00 0 MW

09-11-2026 14:00 - 15:00 0 MW

09-11-2026 15:00 - 16:00 0 MW

09-11-2026 16:00 - 17:00 0 MW

09-11-2026 17:00 - 18:00 0 MW

09-11-2026 18:00 - 19:00 0 MW

09-11-2026 19:00 - 20:00 0 MW

09-11-2026 20:00 - 21:00 0 MW

09-11-2026 21:00 - 22:00 0 MW

09-11-2026 22:00 - 23:00 0 MW

09-11-2026 23:00 - 24:00 0 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 09-11-2026

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:

09-11-2026 00:00 - 01:00 499 MW

09-11-2026 01:00 - 02:00 499 MW

09-11-2026 02:00 - 03:00 499 MW

09-11-2026 03:00 - 04:00 499 MW

09-11-2026 04:00 - 05:00 499 MW

09-11-2026 05:00 - 06:00 499 MW

09-11-2026 06:00 - 07:00 499 MW

09-11-2026 07:00 - 08:00 499 MW

09-11-2026 08:00 - 09:00 499 MW

09-11-2026 09:00 - 10:00 499 MW

09-11-2026 10:00 - 11:00 499 MW

09-11-2026 11:00 - 12:00 499 MW

09-11-2026 12:00 - 13:00 499 MW

09-11-2026 13:00 - 14:00 499 MW

09-11-2026 14:00 - 15:00 499 MW

09-11-2026 15:00 - 16:00 499 MW

09-11-2026 16:00 - 17:00 499 MW

09-11-2026 17:00 - 18:00 499 MW

09-11-2026 18:00 - 19:00 499 MW

09-11-2026 19:00 - 20:00 499 MW

09-11-2026 20:00 - 21:00 499 MW

09-11-2026 21:00 - 22:00 499 MW

09-11-2026 22:00 - 23:00 499 MW

09-11-2026 23:00 - 24:00 499 MW

5. Amount of LTTR remaining after curtailment:

09-11-2026 00:00 - 01:00 0 MW

09-11-2026 01:00 - 02:00 0 MW

09-11-2026 02:00 - 03:00 0 MW

09-11-2026 03:00 - 04:00 0 MW

09-11-2026 04:00 - 05:00 0 MW

09-11-2026 05:00 - 06:00 0 MW

09-11-2026 06:00 - 07:00 0 MW

09-11-2026 07:00 - 08:00 0 MW

09-11-2026 08:00 - 09:00 0 MW

09-11-2026 09:00 - 10:00 0 MW

09-11-2026 10:00 - 11:00 0 MW

09-11-2026 11:00 - 12:00 0 MW

09-11-2026 12:00 - 13:00 0 MW

09-11-2026 13:00 - 14:00 0 MW

09-11-2026 14:00 - 15:00 0 MW

09-11-2026 15:00 - 16:00 0 MW

09-11-2026 16:00 - 17:00 0 MW

09-11-2026 17:00 - 18:00 0 MW

09-11-2026 18:00 - 19:00 0 MW

09-11-2026 19:00 - 20:00 0 MW

09-11-2026 20:00 - 21:00 0 MW

09-11-2026 21:00 - 22:00 0 MW

09-11-2026 22:00 - 23:00 0 MW

09-11-2026 23:00 - 24:00 0 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 IT-SI border for delivery period 09-11-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-SI

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-11-2026 14:00 - 15:00 329 MW

09-11-2026 15:00 - 16:00 329 MW

09-11-2026 16:00 - 17:00 329 MW

09-11-2026 17:00 - 18:00 329 MW

09-11-2026 18:00 - 19:00 329 MW

09-11-2026 19:00 - 20:00 329 MW

09-11-2026 20:00 - 21:00 329 MW

5. Amount of LTTR remaining after curtailment:

09-11-2026 14:00 - 15:00 296 MW

09-11-2026 15:00 - 16:00 0 MW

09-11-2026 16:00 - 17:00 0 MW

09-11-2026 17:00 - 18:00 0 MW

09-11-2026 18:00 - 19:00 0 MW

09-11-2026 19:00 - 20:00 0 MW

09-11-2026 20:00 - 21:00 0 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 AT-IT border for delivery period 09-11-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

AT-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

09-11-2026 00:00 - 01:00 344 MW

09-11-2026 01:00 - 02:00 344 MW

09-11-2026 02:00 - 03:00 344 MW

09-11-2026 03:00 - 04:00 344 MW

09-11-2026 04:00 - 05:00 344 MW

09-11-2026 05:00 - 06:00 344 MW

09-11-2026 06:00 - 07:00 344 MW

09-11-2026 07:00 - 08:00 344 MW

09-11-2026 08:00 - 09:00 344 MW

09-11-2026 09:00 - 10:00 344 MW

09-11-2026 10:00 - 11:00 344 MW

09-11-2026 11:00 - 12:00 344 MW

09-11-2026 12:00 - 13:00 344 MW

09-11-2026 13:00 - 14:00 344 MW

09-11-2026 14:00 - 15:00 344 MW

09-11-2026 15:00 - 16:00 344 MW

09-11-2026 16:00 - 17:00 344 MW

09-11-2026 17:00 - 18:00 344 MW

09-11-2026 18:00 - 19:00 344 MW

09-11-2026 19:00 - 20:00 344 MW

09-11-2026 20:00 - 21:00 344 MW

09-11-2026 21:00 - 22:00 344 MW

09-11-2026 22:00 - 23:00 344 MW

09-11-2026 23:00 - 24:00 344 MW

5. Amount of LTTR remaining after curtailment:

09-11-2026 00:00 - 01:00 285 MW

09-11-2026 01:00 - 02:00 285 MW

09-11-2026 02:00 - 03:00 285 MW

09-11-2026 03:00 - 04:00 285 MW

09-11-2026 04:00 - 05:00 285 MW

09-11-2026 05:00 - 06:00 285 MW

09-11-2026 06:00 - 07:00 285 MW

09-11-2026 07:00 - 08:00 69 MW

09-11-2026 08:00 - 09:00 69 MW

09-11-2026 09:00 - 10:00 69 MW

09-11-2026 10:00 - 11:00 69 MW

09-11-2026 11:00 - 12:00 69 MW

09-11-2026 12:00 - 13:00 69 MW

09-11-2026 13:00 - 14:00 69 MW

09-11-2026 14:00 - 15:00 69 MW

09-11-2026 15:00 - 16:00 69 MW

09-11-2026 16:00 - 17:00 69 MW

09-11-2026 17:00 - 18:00 297 MW

09-11-2026 18:00 - 19:00 221 MW

09-11-2026 19:00 - 20:00 221 MW

09-11-2026 20:00 - 21:00 221 MW

09-11-2026 21:00 - 22:00 145 MW

09-11-2026 22:00 - 23:00 145 MW

09-11-2026 23:00 - 24:00 140 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

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. 

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

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