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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 IFA1, IFA2, NLL, VKL.

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 GR-IT border for delivery period 07-03-2026

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:

07-03-2026 10:00 - 11:00 500 MW

07-03-2026 11:00 - 12:00 500 MW

07-03-2026 12:00 - 13:00 500 MW

07-03-2026 13:00 - 14:00 500 MW

07-03-2026 14:00 - 15:00 500 MW

5. Amount of LTTR remaining after curtailment:

07-03-2026 10:00 - 11:00 0 MW

07-03-2026 11:00 - 12:00 0 MW

07-03-2026 12:00 - 13:00 0 MW

07-03-2026 13:00 - 14:00 0 MW

07-03-2026 14:00 - 15:00 0 MW

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

HVDC cable ARACTHOS – GALATINA


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

Not Applicable

Capacity Curtailment on the ME-IT border for delivery period 07-03-2026

by JAO

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

ME-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

07-03-2026 10:00 - 11:00 400 MW

07-03-2026 11:00 - 12:00 400 MW

07-03-2026 12:00 - 13:00 400 MW

07-03-2026 13:00 - 14:00 400 MW

07-03-2026 14:00 - 15:00 400 MW

5. Amount of LTTR remaining after curtailment:

07-03-2026 10:00 - 11:00 0 MW

07-03-2026 11:00 - 12:00 0 MW

07-03-2026 12:00 - 13:00 0 MW

07-03-2026 13:00 - 14:00 0 MW

07-03-2026 14:00 - 15:00 0 MW

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

HVDC Monita

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

Capacity Curtailment on the AT-IT border for delivery period 06-03-2026

by JAO

1. TSO(s)*:

APG

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:

06-03-2026 07:00 - 08:00 149 MW

06-03-2026 08:00 - 09:00 149 MW

06-03-2026 09:00 - 10:00 149 MW

06-03-2026 10:00 - 11:00 149 MW

06-03-2026 11:00 - 12:00 149 MW

06-03-2026 12:00 - 13:00 149 MW

06-03-2026 13:00 - 14:00 149 MW

06-03-2026 14:00 - 15:00 149 MW

06-03-2026 15:00 - 16:00 149 MW

06-03-2026 16:00 - 17:00 149 MW

5. Amount of LTTR remaining after curtailment:

06-03-2026 07:00 - 08:00 54 MW

06-03-2026 08:00 - 09:00 54 MW

06-03-2026 09:00 - 10:00 54 MW

06-03-2026 10:00 - 11:00 54 MW

06-03-2026 11:00 - 12:00 54 MW

06-03-2026 12:00 - 13:00 54 MW

06-03-2026 13:00 - 14:00 54 MW

06-03-2026 14:00 - 15:00 54 MW

06-03-2026 15:00 - 16:00 54 MW

06-03-2026 16:00 - 17:00 54 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.

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 & EL1-GB-FR.

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

INFO : Missing ENTSO-E Data for February

by JAO

Dear all,

We would like to inform you that some ENTSO-E data publication for February has not yet been published and is currently missing.

We are looking into the matter and working to have it resolved as soon as possible. We will keep you updated .

Thank you for your understanding.

Kind regards,

JAO Operations

Capacity Curtailment on the AT-IT border for delivery period 05-03-2026

by JAO

1. TSO(s)*:

TERNA and APG

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:

05-03-2026 07:00 - 08:00 149 MW

05-03-2026 08:00 - 09:00 149 MW

05-03-2026 09:00 - 10:00 149 MW

05-03-2026 10:00 - 11:00 149 MW

05-03-2026 11:00 - 12:00 149 MW

05-03-2026 12:00 - 13:00 149 MW

05-03-2026 13:00 - 14:00 149 MW

05-03-2026 14:00 - 15:00 149 MW

05-03-2026 15:00 - 16:00 149 MW

05-03-2026 16:00 - 17:00 149 MW

5. Amount of LTTR remaining after curtailment:

05-03-2026 07:00 - 08:00 54 MW

05-03-2026 08:00 - 09:00 54 MW

05-03-2026 09:00 - 10:00 54 MW

05-03-2026 10:00 - 11:00 54 MW

05-03-2026 11:00 - 12:00 54 MW

05-03-2026 12:00 - 13:00 54 MW

05-03-2026 13:00 - 14:00 54 MW

05-03-2026 14:00 - 15:00 54 MW

05-03-2026 15:00 - 16:00 54 MW

05-03-2026 16:00 - 17:00 54 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.

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.

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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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