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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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Capacity Curtailment on the CH-IT border for delivery period 25-12-2025

Published: 24/12/2025 | 08:07 by JAO
Capacity Curtailment on the FR-IT border for delivery period 25-12-2025

Published: 24/12/2025 | 07:42 by JAO
Capacity Curtailment on the SI-IT border for delivery period 25-12-2025

Published: 24/12/2025 | 07:35 by JAO
Capacity Curtailment on the AT-IT border for delivery period 25-12-2025

Published: 24/12/2025 | 07:34 by JAO
2026 Auction Calendar update

Published: 23/12/2025 | 16:48 by JAO
Banking Holiday: January 1st – Impact on Transactions and Credit Limit Updates

Published: 23/12/2025 | 11:52 by JAO
Capacity Curtailment on the AT-IT border for delivery period 24-12-2025

Published: 23/12/2025 | 07:53 by JAO

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1. TSO(s)*:

SWISSGRID

2. Identification of affected Long Term Transmission Rights:

CH-IT

3. Triggering event:

Curtailment due to Curtailment to ensure operation remains within Operational Security Limits

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

25-12-2025 03:00 - 04:00 1083 MW

25-12-2025 04:00 - 05:00 1083 MW

25-12-2025 05:00 - 06:00 1083 MW

25-12-2025 06:00 - 07:00 1083 MW

25-12-2025 07:00 - 08:00 1083 MW

25-12-2025 10:00 - 11:00 1083 MW

25-12-2025 11:00 - 12:00 1083 MW

25-12-2025 12:00 - 13:00 1083 MW

25-12-2025 13:00 - 14:00 1083 MW

25-12-2025 14:00 - 15:00 1083 MW

25-12-2025 15:00 - 16:00 1083 MW

25-12-2025 16:00 - 17:00 1083 MW

5. Amount of LTTR remaining after curtailment:

25-12-2025 03:00 - 04:00 989 MW

25-12-2025 04:00 - 05:00 946 MW

25-12-2025 05:00 - 06:00 946 MW

25-12-2025 06:00 - 07:00 946 MW

25-12-2025 07:00 - 08:00 1021 MW

25-12-2025 10:00 - 11:00 1021 MW

25-12-2025 11:00 - 12:00 1021 MW

25-12-2025 12:00 - 13:00 1021 MW

25-12-2025 13:00 - 14:00 1021 MW

25-12-2025 14:00 - 15:00 1021 MW

25-12-2025 15:00 - 16:00 1021 MW

25-12-2025 16:00 - 17:00 1021 MW

1. TSO(s)*:

TERNA , RTE

2. Identification of affected Long Term Transmission Rights:

FR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

25-12-2025 01:00 - 02:00 1282 MW

25-12-2025 02:00 - 03:00 1282 MW

25-12-2025 03:00 - 04:00 1282 MW

25-12-2025 04:00 - 05:00 1282 MW

25-12-2025 05:00 - 06:00 1282 MW

25-12-2025 06:00 - 07:00 1282 MW

25-12-2025 07:00 - 08:00 1282 MW

25-12-2025 08:00 - 09:00 1282 MW

25-12-2025 09:00 - 10:00 1282 MW

25-12-2025 10:00 - 11:00 1282 MW

25-12-2025 11:00 - 12:00 1282 MW

25-12-2025 12:00 - 13:00 1282 MW

25-12-2025 13:00 - 14:00 1282 MW

25-12-2025 14:00 - 15:00 1282 MW

25-12-2025 15:00 - 16:00 1282 MW

25-12-2025 16:00 - 17:00 1282 MW

25-12-2025 17:00 - 18:00 1282 MW

25-12-2025 18:00 - 19:00 1282 MW

25-12-2025 19:00 - 20:00 1282 MW

25-12-2025 20:00 - 21:00 1282 MW

25-12-2025 21:00 - 22:00 1282 MW

25-12-2025 22:00 - 23:00 1282 MW

25-12-2025 23:00 - 24:00 1282 MW

5. Amount of LTTR remaining after curtailment:

25-12-2025 01:00 - 02:00 1192 MW

25-12-2025 02:00 - 03:00 1192 MW

25-12-2025 03:00 - 04:00 1126 MW

25-12-2025 04:00 - 05:00 1084 MW

25-12-2025 05:00 - 06:00 1084 MW

25-12-2025 06:00 - 07:00 1084 MW

25-12-2025 07:00 - 08:00 1146 MW

25-12-2025 08:00 - 09:00 1192 MW

25-12-2025 09:00 - 10:00 1192 MW

25-12-2025 10:00 - 11:00 1146 MW

25-12-2025 11:00 - 12:00 1146 MW

25-12-2025 12:00 - 13:00 1146 MW

25-12-2025 13:00 - 14:00 1146 MW

25-12-2025 14:00 - 15:00 1146 MW

25-12-2025 15:00 - 16:00 1156 MW

25-12-2025 16:00 - 17:00 1156 MW

25-12-2025 17:00 - 18:00 1194 MW

25-12-2025 18:00 - 19:00 1194 MW

25-12-2025 19:00 - 20:00 1194 MW

25-12-2025 20:00 - 21:00 1194 MW

25-12-2025 21:00 - 22:00 1194 MW

25-12-2025 22:00 - 23:00 1194 MW

25-12-2025 23:00 - 24:00 1194 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

1. TSO(s)*:

TERNA, 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:

25-12-2025 00:00 - 01:00 185 MW

25-12-2025 01:00 - 02:00 185 MW

25-12-2025 02:00 - 03:00 185 MW

25-12-2025 03:00 - 04:00 185 MW

25-12-2025 04:00 - 05:00 185 MW

25-12-2025 05:00 - 06:00 185 MW

25-12-2025 06:00 - 07:00 185 MW

25-12-2025 07:00 - 08:00 185 MW

25-12-2025 08:00 - 09:00 185 MW

25-12-2025 09:00 - 10:00 185 MW

25-12-2025 10:00 - 11:00 185 MW

25-12-2025 11:00 - 12:00 185 MW

25-12-2025 12:00 - 13:00 185 MW

25-12-2025 13:00 - 14:00 185 MW

25-12-2025 14:00 - 15:00 185 MW

25-12-2025 15:00 - 16:00 185 MW

25-12-2025 16:00 - 17:00 185 MW

25-12-2025 17:00 - 18:00 185 MW

25-12-2025 18:00 - 19:00 185 MW

25-12-2025 19:00 - 20:00 185 MW

25-12-2025 20:00 - 21:00 185 MW

25-12-2025 21:00 - 22:00 185 MW

25-12-2025 22:00 - 23:00 185 MW

25-12-2025 23:00 - 24:00 185 MW

5. Amount of LTTR remaining after curtailment:

25-12-2025 00:00 - 01:00 95 MW

25-12-2025 01:00 - 02:00 79 MW

25-12-2025 02:00 - 03:00 79 MW

25-12-2025 03:00 - 04:00 165 MW

25-12-2025 04:00 - 05:00 162 MW

25-12-2025 05:00 - 06:00 162 MW

25-12-2025 06:00 - 07:00 162 MW

25-12-2025 07:00 - 08:00 78 MW

25-12-2025 08:00 - 09:00 79 MW

25-12-2025 09:00 - 10:00 79 MW

25-12-2025 10:00 - 11:00 78 MW

25-12-2025 11:00 - 12:00 78 MW

25-12-2025 12:00 - 13:00 78 MW

25-12-2025 13:00 - 14:00 78 MW

25-12-2025 14:00 - 15:00 78 MW

25-12-2025 15:00 - 16:00 73 MW

25-12-2025 16:00 - 17:00 73 MW

25-12-2025 17:00 - 18:00 74 MW

25-12-2025 18:00 - 19:00 74 MW

25-12-2025 19:00 - 20:00 74 MW

25-12-2025 20:00 - 21:00 74 MW

25-12-2025 21:00 - 22:00 74 MW

25-12-2025 22:00 - 23:00 74 MW

25-12-2025 23:00 - 24:00 74 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

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:

25-12-2025 00:00 - 01:00 204 MW

25-12-2025 01:00 - 02:00 204 MW

25-12-2025 02:00 - 03:00 204 MW

25-12-2025 03:00 - 04:00 204 MW

25-12-2025 04:00 - 05:00 204 MW

25-12-2025 05:00 - 06:00 204 MW

25-12-2025 06:00 - 07:00 204 MW

25-12-2025 07:00 - 08:00 204 MW

25-12-2025 08:00 - 09:00 204 MW

25-12-2025 09:00 - 10:00 204 MW

25-12-2025 10:00 - 11:00 204 MW

25-12-2025 11:00 - 12:00 204 MW

25-12-2025 12:00 - 13:00 204 MW

25-12-2025 13:00 - 14:00 204 MW

25-12-2025 14:00 - 15:00 204 MW

25-12-2025 15:00 - 16:00 204 MW

25-12-2025 16:00 - 17:00 204 MW

25-12-2025 17:00 - 18:00 204 MW

25-12-2025 18:00 - 19:00 204 MW

25-12-2025 19:00 - 20:00 204 MW

25-12-2025 20:00 - 21:00 204 MW

25-12-2025 21:00 - 22:00 204 MW

25-12-2025 22:00 - 23:00 204 MW

25-12-2025 23:00 - 24:00 204 MW

5. Amount of LTTR remaining after curtailment:

25-12-2025 00:00 - 01:00 64 MW

25-12-2025 01:00 - 02:00 64 MW

25-12-2025 02:00 - 03:00 64 MW

25-12-2025 03:00 - 04:00 96 MW

25-12-2025 04:00 - 05:00 85 MW

25-12-2025 05:00 - 06:00 85 MW

25-12-2025 06:00 - 07:00 85 MW

25-12-2025 07:00 - 08:00 64 MW

25-12-2025 08:00 - 09:00 64 MW

25-12-2025 09:00 - 10:00 64 MW

25-12-2025 10:00 - 11:00 64 MW

25-12-2025 11:00 - 12:00 64 MW

25-12-2025 12:00 - 13:00 64 MW

25-12-2025 13:00 - 14:00 64 MW

25-12-2025 14:00 - 15:00 64 MW

25-12-2025 15:00 - 16:00 64 MW

25-12-2025 16:00 - 17:00 64 MW

25-12-2025 17:00 - 18:00 64 MW

25-12-2025 18:00 - 19:00 64 MW

25-12-2025 19:00 - 20:00 64 MW

25-12-2025 20:00 - 21:00 64 MW

25-12-2025 21:00 - 22:00 64 MW

25-12-2025 22:00 - 23:00 64 MW

25-12-2025 23:00 - 24:00 64 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

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridors IF1-GB-FR and IF2-GB-FR.

For more details please refer to the Auction Calendar attached to this message.

Please be advised that January 1^st 2026, is a banking holiday in Luxembourg to celebrate the New Year http://www.jao.eu/resource-center/public-holidays

This holiday applies solely to the banking sector, and JAO Operations will remain available.

Please note that any credit limit update resulting from transactions on your ING business account will not be reflected until January 3^rd

Additionally, transactions initiated after ING Luxembourg's cutoff time on December 31^st, will have a value date of January 3^rd

We kindly recommend that you adjust your financial schedule accordingly to accommodate these changes.

1. TSO(s)*:

TERNA

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:

24-12-2025 00:00 - 01:00 148 MW

24-12-2025 01:00 - 02:00 148 MW

24-12-2025 02:00 - 03:00 148 MW

24-12-2025 03:00 - 04:00 148 MW

24-12-2025 04:00 - 05:00 148 MW

24-12-2025 05:00 - 06:00 148 MW

24-12-2025 06:00 - 07:00 148 MW

24-12-2025 07:00 - 08:00 148 MW

24-12-2025 08:00 - 09:00 148 MW

24-12-2025 09:00 - 10:00 148 MW

24-12-2025 10:00 - 11:00 148 MW

24-12-2025 11:00 - 12:00 148 MW

24-12-2025 12:00 - 13:00 148 MW

24-12-2025 13:00 - 14:00 148 MW

24-12-2025 14:00 - 15:00 148 MW

24-12-2025 15:00 - 16:00 148 MW

24-12-2025 16:00 - 17:00 148 MW

24-12-2025 17:00 - 18:00 148 MW

24-12-2025 18:00 - 19:00 148 MW

24-12-2025 19:00 - 20:00 148 MW

24-12-2025 20:00 - 21:00 148 MW

24-12-2025 21:00 - 22:00 148 MW

24-12-2025 22:00 - 23:00 148 MW

24-12-2025 23:00 - 24:00 148 MW

5. Amount of LTTR remaining after curtailment:

24-12-2025 00:00 - 01:00 74 MW

24-12-2025 01:00 - 02:00 74 MW

24-12-2025 02:00 - 03:00 74 MW

24-12-2025 03:00 - 04:00 121 MW

24-12-2025 04:00 - 05:00 121 MW

24-12-2025 05:00 - 06:00 124 MW

24-12-2025 06:00 - 07:00 121 MW

24-12-2025 07:00 - 08:00 78 MW

24-12-2025 08:00 - 09:00 78 MW

24-12-2025 09:00 - 10:00 134 MW

24-12-2025 10:00 - 11:00 134 MW

24-12-2025 11:00 - 12:00 134 MW

24-12-2025 12:00 - 13:00 78 MW

24-12-2025 13:00 - 14:00 78 MW

24-12-2025 14:00 - 15:00 78 MW

24-12-2025 15:00 - 16:00 78 MW

24-12-2025 16:00 - 17:00 78 MW

24-12-2025 17:00 - 18:00 78 MW

24-12-2025 18:00 - 19:00 78 MW

24-12-2025 19:00 - 20:00 78 MW

24-12-2025 20:00 - 21:00 78 MW

24-12-2025 21:00 - 22:00 78 MW

24-12-2025 22:00 - 23:00 78 MW

24-12-2025 23:00 - 24:00 74 MW

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

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

*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.

Go to resources

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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