See Our

Annual Report

Read here

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.

 

Go down

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

Capacity Curtailment on the SI-AT border for delivery period 16-06-2026

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:

16-06-2026 09:00 - 10:00 370 MW

16-06-2026 10:00 - 11:00 370 MW

16-06-2026 11:00 - 12:00 370 MW

16-06-2026 12:00 - 13:00 370 MW

16-06-2026 13:00 - 14:00 370 MW

16-06-2026 14:00 - 15:00 370 MW

5. Amount of LTTR remaining after curtailment:

16-06-2026 09:00 - 10:00 179 MW

16-06-2026 10:00 - 11:00 146 MW

16-06-2026 11:00 - 12:00 142 MW

16-06-2026 12:00 - 13:00 148 MW

16-06-2026 13:00 - 14:00 148 MW

16-06-2026 14:00 - 15:00 151 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-DE border for delivery period 16-06-2026

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:

16-06-2026 09:00 - 10:00 3620 MW

16-06-2026 10:00 - 11:00 3620 MW

16-06-2026 11:00 - 12:00 3620 MW

16-06-2026 12:00 - 13:00 3620 MW

16-06-2026 13:00 - 14:00 3620 MW

16-06-2026 14:00 - 15:00 3620 MW

5. Amount of LTTR remaining after curtailment:

16-06-2026 09:00 - 10:00 781 MW

16-06-2026 10:00 - 11:00 1086 MW

16-06-2026 11:00 - 12:00 1139 MW

16-06-2026 12:00 - 13:00 1735 MW

16-06-2026 13:00 - 14:00 1665 MW

16-06-2026 14:00 - 15:00 1619 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 16-06-2026

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:

16-06-2026 09:00 - 10:00 295 MW

16-06-2026 10:00 - 11:00 295 MW

16-06-2026 11:00 - 12:00 295 MW

16-06-2026 12:00 - 13:00 295 MW

16-06-2026 13:00 - 14:00 295 MW

16-06-2026 14:00 - 15:00 295 MW

5. Amount of LTTR remaining after curtailment:

16-06-2026 09:00 - 10:00 243 MW

16-06-2026 10:00 - 11:00 243 MW

16-06-2026 11:00 - 12:00 243 MW

16-06-2026 12:00 - 13:00 236 MW

16-06-2026 13:00 - 14:00 236 MW

16-06-2026 14:00 - 15:00 236 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 16-06-2026

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:

16-06-2026 09:00 - 10:00 350 MW

16-06-2026 10:00 - 11:00 350 MW

16-06-2026 11:00 - 12:00 350 MW

16-06-2026 12:00 - 13:00 350 MW

16-06-2026 13:00 - 14:00 350 MW

16-06-2026 14:00 - 15:00 350 MW

5. Amount of LTTR remaining after curtailment:

16-06-2026 09:00 - 10:00 70 MW

16-06-2026 10:00 - 11:00 99 MW

16-06-2026 11:00 - 12:00 101 MW

16-06-2026 12:00 - 13:00 145 MW

16-06-2026 13:00 - 14:00 154 MW

16-06-2026 14:00 - 15:00 151 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.

UPDATE: Unavailability of eCAT, email and publication tool services

by JAO

We are pleased to inform you that our eCAT, email and publication tool services services are available again, as the issue has been successfully resolved.

Unavailability of eCAT, email and publication tool services

by JAO

Due to technical issues, our eCAT, email and publication tool services services are currently unavailable.

We are investigating the situation and we will update the market accordingly.

Capacity Curtailment on the ES-FR border for delivery period 15-06-2026

by JAO

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

ES-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

15-06-2026 06:00 - 07:00 1320 MW

15-06-2026 07:00 - 08:00 1320 MW

15-06-2026 08:00 - 09:00 1320 MW

15-06-2026 09:00 - 10:00 1320 MW

15-06-2026 10:00 - 11:00 1320 MW

15-06-2026 11:00 - 12:00 1320 MW

15-06-2026 12:00 - 13:00 1320 MW

15-06-2026 13:00 - 14:00 1320 MW

15-06-2026 14:00 - 15:00 1320 MW

15-06-2026 15:00 - 16:00 1320 MW

15-06-2026 16:00 - 17:00 1320 MW

15-06-2026 17:00 - 18:00 1320 MW

5. Amount of LTTR remaining after curtailment:

15-06-2026 06:00 - 07:00 964 MW

15-06-2026 07:00 - 08:00 964 MW

15-06-2026 08:00 - 09:00 964 MW

15-06-2026 09:00 - 10:00 964 MW

15-06-2026 10:00 - 11:00 964 MW

15-06-2026 11:00 - 12:00 1202 MW

15-06-2026 12:00 - 13:00 1202 MW

15-06-2026 13:00 - 14:00 1202 MW

15-06-2026 14:00 - 15:00 1202 MW

15-06-2026 15:00 - 16:00 1202 MW

15-06-2026 16:00 - 17:00 1202 MW

15-06-2026 17:00 - 18:00 1202 MW

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

   15/06/2026

      06:00-07:00 Network Security

      07:00-08:00 Network Security

      08:00-09:00 Network Security

      09:00-10:00 Network Security

      10:00-11:00 Network Security

      11:00-12:00 MARMAGNE-TABARDERIE 2

      12:00-13:00 MARMAGNE-TABARDERIE 2

      13:00-14:00 MARMAGNE-TABARDERIE 2

      14:00-15:00 MARMAGNE-TABARDERIE 2

      15:00-16:00 Network Security

      16:00-17:00 Network Security

      17:00-18:00 Network Security

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

   The available remedial actions were assessed as insufficient or ineffective to avoid the violation of operational security limits

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
Image
JAO workers

Frequently asked questions

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

Do you need support?

If you can't find an answer to your question, our team is here to help!