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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.

Auction results Auction calendar

500+

Registered market participants
26k+

Auctions held annually
100%

Auction tool availability
80+

Employees
50

TSOs serviced

Latest market messages

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Publication Tool data for Core ID CCR IDA1 Delivery Day 16/07/2026

Published: 15/07/2026 | 16:47 by JAO
Urgent Market Update: Cancellation of VKL-D1-GB-M-BASE---260801-03 & VKL-GB-D1-M-BASE---260801-03 for Market Period 01/08/2026

Published: 15/07/2026 | 10:56 by JAO
Capacity Curtailment on the FR-ES border for delivery period 16-07-2026

Published: 15/07/2026 | 07:53 by JAO
Capacity Curtailment on the IT-CH border for delivery period 16-07-2026

Published: 15/07/2026 | 07:38 by JAO
Capacity Curtailment on the IT-FR border for delivery period 16-07-2026

Published: 15/07/2026 | 07:33 by JAO
Capacity Curtailment on the IT-AT border for delivery period 16-07-2026

Published: 15/07/2026 | 07:31 by JAO
Capacity Curtailment on the IT-SI border for delivery period 16-07-2026

Published: 15/07/2026 | 07:31 by JAO

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Please be informed that, due to the cancellation of IDA1 for the delivery date 16/07/2026, no IDA1 publication data will be available in the CORE ID CCR Publication Tool .

As per TSO request, the VKL-D1-GB & VKL-GB-D1 Monthly Auctions for market period 01/08/2026 with the auction ID VKL-D1-GB-M-BASE---260801-03 & VKL-GB-D1-M-BASE---260801-03 has been cancelled.

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

16-07-2026 00:00 - 01:00 1599 MW

16-07-2026 01:00 - 02:00 1599 MW

16-07-2026 02:00 - 03:00 1599 MW

16-07-2026 03:00 - 04:00 1599 MW

16-07-2026 04:00 - 05:00 1599 MW

16-07-2026 05:00 - 06:00 1599 MW

16-07-2026 06:00 - 07:00 1599 MW

16-07-2026 07:00 - 08:00 1599 MW

16-07-2026 20:00 - 21:00 1599 MW

16-07-2026 21:00 - 22:00 1599 MW

16-07-2026 22:00 - 23:00 1599 MW

16-07-2026 23:00 - 24:00 1599 MW

5. Amount of LTTR remaining after curtailment:

16-07-2026 00:00 - 01:00 973 MW

16-07-2026 01:00 - 02:00 973 MW

16-07-2026 02:00 - 03:00 973 MW

16-07-2026 03:00 - 04:00 973 MW

16-07-2026 04:00 - 05:00 973 MW

16-07-2026 05:00 - 06:00 973 MW

16-07-2026 06:00 - 07:00 973 MW

16-07-2026 07:00 - 08:00 973 MW

16-07-2026 20:00 - 21:00 973 MW

16-07-2026 21:00 - 22:00 973 MW

16-07-2026 22:00 - 23:00 973 MW

16-07-2026 23:00 - 24:00 973 MW

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

00:00-01:00 VICH - BAIXAS 1

01:00-02:00 VICH - BAIXAS 1

02:00-03:00 VICH - BAIXAS 1

03:00-04:00 VICH - BAIXAS 1

04:00-05:00 VICH - BAIXAS 1

05:00-06:00 VICH - BAIXAS 1

06:00-07:00 VICH - BAIXAS 1

07:00-08:00 VICH - BAIXAS 1

20:00-21:00 VICH - BAIXAS 1

21:00-22:00 VICH - BAIXAS 1

22:00-23:00 VICH - BAIXAS 1

23:00-24:00 VICH - BAIXAS 1

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

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

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

16-07-2026 18:00 - 19:00 719 MW

16-07-2026 19:00 - 20:00 719 MW

16-07-2026 20:00 - 21:00 719 MW

16-07-2026 21:00 - 22:00 719 MW

16-07-2026 22:00 - 23:00 719 MW

5. Amount of LTTR remaining after curtailment:

16-07-2026 18:00 - 19:00 591 MW

16-07-2026 19:00 - 20:00 0 MW

16-07-2026 20:00 - 21:00 0 MW

16-07-2026 21:00 - 22:00 0 MW

16-07-2026 22:00 - 23:00 591 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

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

1. TSO(s)*:

TERNA

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:

16-07-2026 18:00 - 19:00 1370 MW

16-07-2026 19:00 - 20:00 1370 MW

16-07-2026 20:00 - 21:00 1370 MW

16-07-2026 21:00 - 22:00 1370 MW

16-07-2026 22:00 - 23:00 1370 MW

5. Amount of LTTR remaining after curtailment:

16-07-2026 18:00 - 19:00 695 MW

16-07-2026 19:00 - 20:00 0 MW

16-07-2026 20:00 - 21:00 0 MW

16-07-2026 21:00 - 22:00 0 MW

16-07-2026 22:00 - 23:00 684 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

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

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

16-07-2026 18:00 - 19:00 73 MW

16-07-2026 19:00 - 20:00 73 MW

16-07-2026 20:00 - 21:00 73 MW

16-07-2026 21:00 - 22:00 73 MW

16-07-2026 22:00 - 23:00 73 MW

5. Amount of LTTR remaining after curtailment:

16-07-2026 18:00 - 19:00 37 MW

16-07-2026 19:00 - 20:00 0 MW

16-07-2026 20:00 - 21:00 0 MW

16-07-2026 21:00 - 22:00 0 MW

16-07-2026 22:00 - 23:00 37 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

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

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-SI

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

16-07-2026 18:00 - 19:00 315 MW

16-07-2026 19:00 - 20:00 315 MW

16-07-2026 20:00 - 21:00 315 MW

16-07-2026 21:00 - 22:00 315 MW

16-07-2026 22:00 - 23:00 315 MW

5. Amount of LTTR remaining after curtailment:

16-07-2026 18:00 - 19:00 215 MW

16-07-2026 19:00 - 20:00 0 MW

16-07-2026 20:00 - 21:00 0 MW

16-07-2026 21:00 - 22:00 0 MW

16-07-2026 22:00 - 23:00 233 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

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

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.

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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Register your company

We created a user guide to support the onboarding of market participants. Learn more about the steps to register, the required documents and our service desk platform.

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