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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.

 

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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

2026 Auction Calendar update

by JAO

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor EL1.

For more details please refer to the Auction Calendar on our webpage http://www.jao.eu/auctions#/calendar/table to find its latest version.

2026 Auction Calendar update

by JAO

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor EL1.

For more details please refer to the Auction Calendar on our webpage http://www.jao.eu/auctions#/calendar/table to find its latest version.

Capacity Curtailment on the SI-IT border for delivery period 24-01-2026

by JAO

1. TSO(s)*:

TERNA, RTE, APG, SWISSIGRID, ELES

2. Identification of affected Long Term Transmission Rights:

SI-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

24-01-2026 09:00 - 10:00 310 MW

24-01-2026 10:00 - 11:00 310 MW

24-01-2026 11:00 - 12:00 310 MW

24-01-2026 12:00 - 13:00 310 MW

24-01-2026 13:00 - 14:00 310 MW

24-01-2026 14:00 - 15:00 310 MW

5. Amount of LTTR remaining after curtailment:

24-01-2026 09:00 - 10:00 283 MW

24-01-2026 10:00 - 11:00 283 MW

24-01-2026 11:00 - 12:00 283 MW

24-01-2026 12:00 - 13:00 284 MW

24-01-2026 13:00 - 14:00 284 MW

24-01-2026 14:00 - 15:00 284 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

*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 24-01-2026

by JAO

1. TSO(s)*:

TERNA, RTE, APG, SWISSIGRID, ELES

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:

24-01-2026 00:00 - 01:00 224 MW

24-01-2026 01:00 - 02:00 224 MW

24-01-2026 02:00 - 03:00 224 MW

24-01-2026 07:00 - 08:00 224 MW

24-01-2026 08:00 - 09:00 224 MW

24-01-2026 09:00 - 10:00 224 MW

24-01-2026 10:00 - 11:00 224 MW

24-01-2026 11:00 - 12:00 224 MW

24-01-2026 12:00 - 13:00 224 MW

24-01-2026 13:00 - 14:00 224 MW

24-01-2026 14:00 - 15:00 224 MW

24-01-2026 17:00 - 18:00 224 MW

24-01-2026 21:00 - 22:00 224 MW

24-01-2026 22:00 - 23:00 224 MW

24-01-2026 23:00 - 24:00 224 MW

5. Amount of LTTR remaining after curtailment:

24-01-2026 00:00 - 01:00 177 MW

24-01-2026 01:00 - 02:00 177 MW

24-01-2026 02:00 - 03:00 177 MW

24-01-2026 07:00 - 08:00 172 MW

24-01-2026 08:00 - 09:00 172 MW

24-01-2026 09:00 - 10:00 189 MW

24-01-2026 10:00 - 11:00 189 MW

24-01-2026 11:00 - 12:00 189 MW

24-01-2026 12:00 - 13:00 158 MW

24-01-2026 13:00 - 14:00 158 MW

24-01-2026 14:00 - 15:00 158 MW

24-01-2026 17:00 - 18:00 194 MW

24-01-2026 21:00 - 22:00 172 MW

24-01-2026 22:00 - 23:00 172 MW

24-01-2026 23:00 - 24:00 157 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

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

2026 Auction Calendar update

by JAO

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor VKL-D1<>GB and IF2-FR-<>BG.

For more details please refer to the Auction Calendar on our webpage http://www.jao.eu/auctions#/calendar/table to find its latest version.

Capacity Curtailment on the SI-IT border for delivery period 23-01-2026

by JAO

1. TSO(s)*:

TERNA, RTE, APG, SWISSIGRID, ELES

2. Identification of affected Long Term Transmission Rights:

SI-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

23-01-2026 23:00 - 24:00 310 MW

5. Amount of LTTR remaining after curtailment:

23-01-2026 23:00 - 24:00 278 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

*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-FR border for delivery period 23-01-2026

by JAO

1. TSO(s)*:

TERNA, RTE, APG, SWISSIGRID, ELES

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:

23-01-2026 15:00 - 16:00 1495 MW

23-01-2026 16:00 - 17:00 1495 MW

5. Amount of LTTR remaining after curtailment:

23-01-2026 15:00 - 16:00 1430 MW

23-01-2026 16:00 - 17:00 1430 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

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

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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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.

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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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