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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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Update: Capacity Curtailment on the DE-AT border for delivery period 11-12-2025

Published: 09/12/2025 | 19:13 by JAO
IFA2 Weekly Auction Resale Gate closure extension

Published: 09/12/2025 | 15:36 by JAO
Capacity Curtailment on the DE-AT border for delivery period 11-12-2025

Published: 09/12/2025 | 14:23 by JAO
2026 Auction Calendar update

Published: 09/12/2025 | 12:43 by JAO
Capacity Curtailment on the AT-IT border for delivery period 10-12-2025

Published: 09/12/2025 | 07:20 by JAO
Capacity Curtailment on the ES-FR border for delivery period 10-12-2025

Published: 08/12/2025 | 22:46 by JAO
Capacity Curtailment on the DE-AT border for delivery period 10-12-2025

Published: 08/12/2025 | 15:10 by JAO

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1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

DE-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

11-12-2025 00:00 - 01:00 4819 MW

11-12-2025 01:00 - 02:00 4819 MW

11-12-2025 02:00 - 03:00 4819 MW

11-12-2025 03:00 - 04:00 4819 MW

11-12-2025 04:00 - 05:00 4819 MW

11-12-2025 05:00 - 06:00 4819 MW

11-12-2025 06:00 - 07:00 4819 MW

11-12-2025 07:00 - 08:00 4819 MW

11-12-2025 08:00 - 09:00 4819 MW

11-12-2025 09:00 - 10:00 4819 MW

11-12-2025 10:00 - 11:00 4819 MW

11-12-2025 11:00 - 12:00 4819 MW

11-12-2025 12:00 - 13:00 4819 MW

11-12-2025 13:00 - 14:00 4819 MW

11-12-2025 14:00 - 15:00 4819 MW

11-12-2025 15:00 - 16:00 4819 MW

11-12-2025 16:00 - 17:00 4819 MW

11-12-2025 17:00 - 18:00 4819 MW

11-12-2025 18:00 - 19:00 4819 MW

11-12-2025 19:00 - 20:00 4819 MW

11-12-2025 20:00 - 21:00 4819 MW

11-12-2025 21:00 - 22:00 4819 MW

11-12-2025 22:00 - 23:00 4819 MW

11-12-2025 23:00 - 24:00 4819 MW

5. Amount of LTTR remaining after curtailment:

11-12-2025 00:00 - 01:00 3956 MW

11-12-2025 01:00 - 02:00 3956 MW

11-12-2025 02:00 - 03:00 3956 MW

11-12-2025 03:00 - 04:00 3956 MW

11-12-2025 04:00 - 05:00 3956 MW

11-12-2025 05:00 - 06:00 3956 MW

11-12-2025 06:00 - 07:00 3956 MW

11-12-2025 07:00 - 08:00 3956 MW

11-12-2025 08:00 - 09:00 3956 MW

11-12-2025 09:00 - 10:00 3956 MW

11-12-2025 10:00 - 11:00 3956 MW

11-12-2025 11:00 - 12:00 3956 MW

11-12-2025 12:00 - 13:00 3956 MW

11-12-2025 13:00 - 14:00 3956 MW

11-12-2025 14:00 - 15:00 3956 MW

11-12-2025 15:00 - 16:00 3956 MW

11-12-2025 16:00 - 17:00 3956 MW

11-12-2025 17:00 - 18:00 3956 MW

11-12-2025 18:00 - 19:00 3956 MW

11-12-2025 19:00 - 20:00 3956 MW

11-12-2025 20:00 - 21:00 3956 MW

11-12-2025 21:00 - 22:00 3956 MW

11-12-2025 22:00 - 23:00 3956 MW

11-12-2025 23:00 - 24:00 3956 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.

Please note that the Resale gate for the following auctions will stay open until 10/12/2025 allowing all Market Participants to submit their resale.

IF2-FR-GB-E-BASE---251213-01
IF2-GB-FR-E-BASE---251213-01

Best regards,

JAO Operations

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

DE-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

11-12-2025 00:00 - 01:00 4819 MW

11-12-2025 01:00 - 02:00 4819 MW

11-12-2025 02:00 - 03:00 4819 MW

11-12-2025 03:00 - 04:00 4819 MW

11-12-2025 04:00 - 05:00 4819 MW

11-12-2025 05:00 - 06:00 4819 MW

11-12-2025 06:00 - 07:00 4819 MW

11-12-2025 07:00 - 08:00 4819 MW

11-12-2025 08:00 - 09:00 4819 MW

11-12-2025 09:00 - 10:00 4819 MW

11-12-2025 10:00 - 11:00 4819 MW

11-12-2025 11:00 - 12:00 4819 MW

11-12-2025 12:00 - 13:00 4819 MW

11-12-2025 13:00 - 14:00 4819 MW

11-12-2025 14:00 - 15:00 4819 MW

11-12-2025 15:00 - 16:00 4819 MW

11-12-2025 16:00 - 17:00 4819 MW

11-12-2025 17:00 - 18:00 4819 MW

11-12-2025 18:00 - 19:00 4819 MW

11-12-2025 19:00 - 20:00 4819 MW

11-12-2025 20:00 - 21:00 4819 MW

11-12-2025 21:00 - 22:00 4819 MW

11-12-2025 22:00 - 23:00 4819 MW

11-12-2025 23:00 - 24:00 4819 MW

5. Amount of LTTR remaining after curtailment:

11-12-2025 00:00 - 01:00 4458 MW

11-12-2025 01:00 - 02:00 4458 MW

11-12-2025 02:00 - 03:00 4458 MW

11-12-2025 03:00 - 04:00 4458 MW

11-12-2025 04:00 - 05:00 4458 MW

11-12-2025 05:00 - 06:00 4458 MW

11-12-2025 06:00 - 07:00 4458 MW

11-12-2025 07:00 - 08:00 4458 MW

11-12-2025 08:00 - 09:00 4458 MW

11-12-2025 09:00 - 10:00 4458 MW

11-12-2025 10:00 - 11:00 4458 MW

11-12-2025 11:00 - 12:00 4458 MW

11-12-2025 12:00 - 13:00 4458 MW

11-12-2025 13:00 - 14:00 4458 MW

11-12-2025 14:00 - 15:00 4458 MW

11-12-2025 15:00 - 16:00 4458 MW

11-12-2025 16:00 - 17:00 4458 MW

11-12-2025 17:00 - 18:00 4458 MW

11-12-2025 18:00 - 19:00 4458 MW

11-12-2025 19:00 - 20:00 4458 MW

11-12-2025 20:00 - 21:00 4458 MW

11-12-2025 21:00 - 22:00 4458 MW

11-12-2025 22:00 - 23:00 4458 MW

11-12-2025 23:00 - 24:00 4458 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.

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor EL1 and IF1. For more details, please refer to the Auction Calendar attached here to find its latest version.

1. TSO(s)*:

TERNA, 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:

10-12-2025 15:00 - 16:00 204 MW

10-12-2025 16:00 - 17:00 204 MW

10-12-2025 17:00 - 18:00 204 MW

5. Amount of LTTR remaining after curtailment:

10-12-2025 15:00 - 16:00 129 MW

10-12-2025 16:00 - 17:00 129 MW

10-12-2025 17:00 - 18:00 129 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

1. TSO(s)*:

RTE, REE

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:

10-12-2025 17:00 - 18:00 2240 MW

10-12-2025 18:00 - 19:00 2240 MW

10-12-2025 19:00 - 20:00 2240 MW

10-12-2025 20:00 - 21:00 2240 MW

10-12-2025 21:00 - 22:00 2240 MW

10-12-2025 22:00 - 23:00 2240 MW

10-12-2025 23:00 - 24:00 2240 MW

5. Amount of LTTR remaining after curtailment:

10-12-2025 17:00 - 18:00 1791 MW

10-12-2025 18:00 - 19:00 1549 MW

10-12-2025 19:00 - 20:00 1378 MW

10-12-2025 20:00 - 21:00 1211 MW

10-12-2025 21:00 - 22:00 1434 MW

10-12-2025 22:00 - 23:00 1378 MW

10-12-2025 23:00 - 24:00 1378 MW

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

10/12/2025 17:00-18:00 argia-arkale 1 18:00-19:00 Network Security 19:00-20:00 Network Security 20:00-21:00 Network Security 21:00-22:00 Network Security 22:00-23:00 Network Security 23:00-24:00 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

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

DE-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

10-12-2025 00:00 - 01:00 4819 MW

10-12-2025 01:00 - 02:00 4819 MW

10-12-2025 02:00 - 03:00 4819 MW

10-12-2025 03:00 - 04:00 4819 MW

10-12-2025 04:00 - 05:00 4819 MW

10-12-2025 05:00 - 06:00 4819 MW

10-12-2025 06:00 - 07:00 4819 MW

10-12-2025 07:00 - 08:00 4819 MW

10-12-2025 08:00 - 09:00 4819 MW

10-12-2025 09:00 - 10:00 4819 MW

10-12-2025 10:00 - 11:00 4819 MW

10-12-2025 11:00 - 12:00 4819 MW

10-12-2025 12:00 - 13:00 4819 MW

10-12-2025 13:00 - 14:00 4819 MW

10-12-2025 14:00 - 15:00 4819 MW

10-12-2025 15:00 - 16:00 4819 MW

10-12-2025 16:00 - 17:00 4819 MW

10-12-2025 17:00 - 18:00 4819 MW

10-12-2025 18:00 - 19:00 4819 MW

10-12-2025 19:00 - 20:00 4819 MW

10-12-2025 20:00 - 21:00 4819 MW

10-12-2025 21:00 - 22:00 4819 MW

10-12-2025 22:00 - 23:00 4819 MW

10-12-2025 23:00 - 24:00 4819 MW

5. Amount of LTTR remaining after curtailment:

10-12-2025 00:00 - 01:00 4458 MW

10-12-2025 01:00 - 02:00 4458 MW

10-12-2025 02:00 - 03:00 4458 MW

10-12-2025 03:00 - 04:00 4458 MW

10-12-2025 04:00 - 05:00 4458 MW

10-12-2025 05:00 - 06:00 4458 MW

10-12-2025 06:00 - 07:00 4458 MW

10-12-2025 07:00 - 08:00 4458 MW

10-12-2025 08:00 - 09:00 4458 MW

10-12-2025 09:00 - 10:00 4458 MW

10-12-2025 10:00 - 11:00 4458 MW

10-12-2025 11:00 - 12:00 4458 MW

10-12-2025 12:00 - 13:00 4458 MW

10-12-2025 13:00 - 14:00 4458 MW

10-12-2025 14:00 - 15:00 4458 MW

10-12-2025 15:00 - 16:00 4458 MW

10-12-2025 16:00 - 17:00 4458 MW

10-12-2025 17:00 - 18:00 4458 MW

10-12-2025 18:00 - 19:00 4458 MW

10-12-2025 19:00 - 20:00 4458 MW

10-12-2025 20:00 - 21:00 4458 MW

10-12-2025 21:00 - 22:00 4458 MW

10-12-2025 22:00 - 23:00 4458 MW

10-12-2025 23:00 - 24:00 4458 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.

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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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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