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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

FR–IT: Updated Public Consultation on the Proposed Implementation of Preliminary Yearly Auctions for LTTRs

by JAO

With reference to the previous message regarding the FR–IT: Public Consultation on the Proposed Implementation of Preliminary Yearly Auctions for LTTRs, please note that, upon TSO request, an updated version of the FR–IT Public Consultation document has been provided.

Please disregard the previously attached document and refer only to the updated version attached to this message.

Public Consultation on the Proposed Implementation of Preliminary Yearly Auctions for LTTRs on the CH–IT Borders

by JAO

On behalf of Terna and Swissgrid, JAO would like to inform market participants that a public consultation has been launched regarding the proposed implementation of preliminary yearly auctions for Long-Term Transmission Rights (LTTRs) on the CH–IT borders.

The purpose of this consultation is to gather feedback from market participants on the proposed auction design and implementation approach for preliminary yearly auctions allocating a share of the yearly LTTRs for Business Years 2027 and 2028.

Market participants are invited to review the attached consultation documents and submit their comments by 10 August 2026, following the procedures and contact details provided in the respective documents.

The consultation documents include detailed information on the proposed auction products, offered capacities, implementation timeline and consultation process for each border.

Attachments:

CH-IT Public Consultation Message

 

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 corridors IFA1 and IFA2.

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 ES-FR border for delivery period 10-07-2026

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:

10-07-2026 15:00 - 16:00 750 MW

10-07-2026 16:00 - 17:00 750 MW

10-07-2026 17:00 - 18:00 750 MW

5. Amount of LTTR remaining after curtailment:

10-07-2026 15:00 - 16:00 384 MW

10-07-2026 16:00 - 17:00 384 MW

10-07-2026 17:00 - 18:00 384 MW

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

   10/07/2026

      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

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-FR<>GB and .

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-FR<>GB and .

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 ES-FR border for delivery period 09-07-2026

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:

09-07-2026 15:00 - 16:00 750 MW

09-07-2026 16:00 - 17:00 750 MW

09-07-2026 17:00 - 18:00 750 MW

5. Amount of LTTR remaining after curtailment:

09-07-2026 15:00 - 16:00 384 MW

09-07-2026 16:00 - 17:00 384 MW

09-07-2026 17:00 - 18:00 384 MW

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

   09/07/2026

      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. 

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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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Frequently asked questions

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

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