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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 IF1-GB-FR border for delivery period 26-09-2026

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

2. Identification of affected Long Term Transmission Rights:

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

26-09-2026 00:00 - 01:00 900 MW

26-09-2026 01:00 - 02:00 900 MW

26-09-2026 02:00 - 03:00 900 MW

26-09-2026 03:00 - 04:00 900 MW

26-09-2026 04:00 - 05:00 900 MW

26-09-2026 05:00 - 06:00 900 MW

26-09-2026 06:00 - 07:00 900 MW

26-09-2026 07:00 - 08:00 900 MW

26-09-2026 08:00 - 09:00 900 MW

26-09-2026 09:00 - 10:00 900 MW

26-09-2026 10:00 - 11:00 900 MW

26-09-2026 11:00 - 12:00 900 MW

26-09-2026 12:00 - 13:00 900 MW

26-09-2026 13:00 - 14:00 900 MW

26-09-2026 14:00 - 15:00 900 MW

26-09-2026 15:00 - 16:00 900 MW

26-09-2026 16:00 - 17:00 900 MW

26-09-2026 17:00 - 18:00 900 MW

26-09-2026 18:00 - 19:00 900 MW

26-09-2026 19:00 - 20:00 900 MW

26-09-2026 20:00 - 21:00 900 MW

26-09-2026 21:00 - 22:00 900 MW

26-09-2026 22:00 - 23:00 900 MW

26-09-2026 23:00 - 24:00 900 MW

5. Amount of LTTR remaining after curtailment:

26-09-2026 00:00 - 01:00 0 MW

26-09-2026 01:00 - 02:00 0 MW

26-09-2026 02:00 - 03:00 0 MW

26-09-2026 03:00 - 04:00 0 MW

26-09-2026 04:00 - 05:00 0 MW

26-09-2026 05:00 - 06:00 0 MW

26-09-2026 06:00 - 07:00 0 MW

26-09-2026 07:00 - 08:00 0 MW

26-09-2026 08:00 - 09:00 0 MW

26-09-2026 09:00 - 10:00 0 MW

26-09-2026 10:00 - 11:00 0 MW

26-09-2026 11:00 - 12:00 0 MW

26-09-2026 12:00 - 13:00 0 MW

26-09-2026 13:00 - 14:00 0 MW

26-09-2026 14:00 - 15:00 0 MW

26-09-2026 15:00 - 16:00 0 MW

26-09-2026 16:00 - 17:00 0 MW

26-09-2026 17:00 - 18:00 0 MW

26-09-2026 18:00 - 19:00 0 MW

26-09-2026 19:00 - 20:00 0 MW

26-09-2026 20:00 - 21:00 0 MW

26-09-2026 21:00 - 22:00 0 MW

26-09-2026 22:00 - 23:00 0 MW

26-09-2026 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*:

Thermal Limits

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

Capacity limitation due to unplanned maintenance

Capacity Curtailment on the AT-DE border for delivery period 13-09-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-DE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-09-2026 09:00 - 10:00 3819 MW

13-09-2026 10:00 - 11:00 3819 MW

13-09-2026 11:00 - 12:00 3819 MW

13-09-2026 12:00 - 13:00 3819 MW

13-09-2026 13:00 - 14:00 3819 MW

13-09-2026 14:00 - 15:00 3819 MW

5. Amount of LTTR remaining after curtailment:

13-09-2026 09:00 - 10:00 2845 MW

13-09-2026 10:00 - 11:00 3169 MW

13-09-2026 11:00 - 12:00 3119 MW

13-09-2026 12:00 - 13:00 2949 MW

13-09-2026 13:00 - 14:00 2988 MW

13-09-2026 14:00 - 15:00 3259 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)*?

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

Capacity Curtailment on the AT-CZ border for delivery period 13-09-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-CZ

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-09-2026 09:00 - 10:00 350 MW

13-09-2026 10:00 - 11:00 350 MW

13-09-2026 11:00 - 12:00 350 MW

13-09-2026 12:00 - 13:00 350 MW

13-09-2026 13:00 - 14:00 350 MW

13-09-2026 14:00 - 15:00 350 MW

13-09-2026 15:00 - 16:00 350 MW

5. Amount of LTTR remaining after curtailment:

13-09-2026 09:00 - 10:00 172 MW

13-09-2026 10:00 - 11:00 141 MW

13-09-2026 11:00 - 12:00 140 MW

13-09-2026 12:00 - 13:00 172 MW

13-09-2026 13:00 - 14:00 170 MW

13-09-2026 14:00 - 15:00 170 MW

13-09-2026 15:00 - 16:00 203 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)*?

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

Capacity Curtailment on the HU-AT border for delivery period 13-09-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

HU-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-09-2026 09:00 - 10:00 260 MW

13-09-2026 10:00 - 11:00 260 MW

13-09-2026 11:00 - 12:00 260 MW

13-09-2026 12:00 - 13:00 260 MW

13-09-2026 13:00 - 14:00 260 MW

13-09-2026 14:00 - 15:00 260 MW

13-09-2026 15:00 - 16:00 260 MW

5. Amount of LTTR remaining after curtailment:

13-09-2026 09:00 - 10:00 218 MW

13-09-2026 10:00 - 11:00 218 MW

13-09-2026 11:00 - 12:00 218 MW

13-09-2026 12:00 - 13:00 224 MW

13-09-2026 13:00 - 14:00 224 MW

13-09-2026 14:00 - 15:00 214 MW

13-09-2026 15:00 - 16:00 218 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)*?

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

Capacity Curtailment on the SI-AT border for delivery period 13-09-2026

by JAO

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

SI-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-09-2026 09:00 - 10:00 310 MW

13-09-2026 10:00 - 11:00 310 MW

13-09-2026 11:00 - 12:00 310 MW

13-09-2026 12:00 - 13:00 310 MW

13-09-2026 13:00 - 14:00 310 MW

13-09-2026 14:00 - 15:00 310 MW

13-09-2026 15:00 - 16:00 310 MW

5. Amount of LTTR remaining after curtailment:

13-09-2026 09:00 - 10:00 171 MW

13-09-2026 10:00 - 11:00 186 MW

13-09-2026 11:00 - 12:00 200 MW

13-09-2026 12:00 - 13:00 203 MW

13-09-2026 13:00 - 14:00 203 MW

13-09-2026 14:00 - 15:00 210 MW

13-09-2026 15:00 - 16:00 221 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)*?

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

Capacity Curtailment on the GR-IT border for delivery period 13-09-2026

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:

13-09-2026 09:00 - 10:00 500 MW

13-09-2026 10:00 - 11:00 500 MW

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

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

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

13-09-2026 14:00 - 15:00 500 MW

13-09-2026 15:00 - 16:00 500 MW

5. Amount of LTTR remaining after curtailment:

13-09-2026 09:00 - 10:00 0 MW

13-09-2026 10:00 - 11:00 0 MW

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

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

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

13-09-2026 14:00 - 15:00 0 MW

13-09-2026 15:00 - 16:00 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 IF1-GB-FR border for delivery period 25-09-2026

by JAO

1. TSO(s)*:

RNP

2. Identification of affected Long Term Transmission Rights:

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

25-09-2026 00:00 - 01:00 900 MW

25-09-2026 01:00 - 02:00 900 MW

25-09-2026 02:00 - 03:00 900 MW

25-09-2026 03:00 - 04:00 900 MW

25-09-2026 04:00 - 05:00 900 MW

25-09-2026 05:00 - 06:00 900 MW

25-09-2026 06:00 - 07:00 900 MW

25-09-2026 07:00 - 08:00 900 MW

25-09-2026 08:00 - 09:00 900 MW

25-09-2026 09:00 - 10:00 900 MW

25-09-2026 10:00 - 11:00 900 MW

25-09-2026 11:00 - 12:00 900 MW

25-09-2026 12:00 - 13:00 900 MW

25-09-2026 13:00 - 14:00 900 MW

25-09-2026 14:00 - 15:00 900 MW

25-09-2026 15:00 - 16:00 900 MW

25-09-2026 16:00 - 17:00 900 MW

25-09-2026 17:00 - 18:00 900 MW

25-09-2026 18:00 - 19:00 900 MW

25-09-2026 19:00 - 20:00 900 MW

25-09-2026 20:00 - 21:00 900 MW

25-09-2026 21:00 - 22:00 900 MW

25-09-2026 22:00 - 23:00 900 MW

25-09-2026 23:00 - 24:00 900 MW

5. Amount of LTTR remaining after curtailment:

25-09-2026 00:00 - 01:00 0 MW

25-09-2026 01:00 - 02:00 0 MW

25-09-2026 02:00 - 03:00 0 MW

25-09-2026 03:00 - 04:00 0 MW

25-09-2026 04:00 - 05:00 0 MW

25-09-2026 05:00 - 06:00 0 MW

25-09-2026 06:00 - 07:00 0 MW

25-09-2026 07:00 - 08:00 0 MW

25-09-2026 08:00 - 09:00 0 MW

25-09-2026 09:00 - 10:00 0 MW

25-09-2026 10:00 - 11:00 0 MW

25-09-2026 11:00 - 12:00 0 MW

25-09-2026 12:00 - 13:00 0 MW

25-09-2026 13:00 - 14:00 0 MW

25-09-2026 14:00 - 15:00 0 MW

25-09-2026 15:00 - 16:00 0 MW

25-09-2026 16:00 - 17:00 0 MW

25-09-2026 17:00 - 18:00 0 MW

25-09-2026 18:00 - 19:00 0 MW

25-09-2026 19:00 - 20:00 0 MW

25-09-2026 20:00 - 21:00 0 MW

25-09-2026 21:00 - 22:00 0 MW

25-09-2026 22:00 - 23:00 0 MW

25-09-2026 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*:

Thermal Limits

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

Capacity limitation due to unplanned maintenance

Resource Center

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

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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.

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