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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 DE-AT border for delivery period 14-10-2025

Published: 12/10/2025 | 13:48 by JAO
Capacity Curtailment on the EE-LV border for delivery period 13-10-2025

Published: 12/10/2025 | 10:46 by JAO
Capacity Curtailment on the GR-IT border for delivery period 13-10-2025

Published: 12/10/2025 | 07:46 by JAO
Capacity Curtailment on the IT-GR border for delivery period 13-10-2025

Published: 12/10/2025 | 07:44 by JAO
Capacity Curtailment on the IT-SI border for delivery period 13-10-2025

Published: 12/10/2025 | 07:44 by JAO
Capacity Curtailment on the IT-FR border for delivery period 13-10-2025

Published: 12/10/2025 | 07:44 by JAO
Capacity Curtailment on the IT-AT border for delivery period 13-10-2025

Published: 12/10/2025 | 07:42 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:

14-10-2025 00:00 - 01:00 4819 MW

14-10-2025 01:00 - 02:00 4819 MW

14-10-2025 02:00 - 03:00 4819 MW

14-10-2025 03:00 - 04:00 4819 MW

14-10-2025 04:00 - 05:00 4819 MW

14-10-2025 05:00 - 06:00 4819 MW

14-10-2025 06:00 - 07:00 4819 MW

14-10-2025 07:00 - 08:00 4819 MW

14-10-2025 08:00 - 09:00 4819 MW

14-10-2025 09:00 - 10:00 4819 MW

14-10-2025 10:00 - 11:00 4819 MW

14-10-2025 11:00 - 12:00 4819 MW

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

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

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

14-10-2025 15:00 - 16:00 4819 MW

14-10-2025 16:00 - 17:00 4819 MW

14-10-2025 17:00 - 18:00 4819 MW

14-10-2025 18:00 - 19:00 4819 MW

14-10-2025 19:00 - 20:00 4819 MW

14-10-2025 20:00 - 21:00 4819 MW

14-10-2025 21:00 - 22:00 4819 MW

14-10-2025 22:00 - 23:00 4819 MW

14-10-2025 23:00 - 24:00 4819 MW

5. Amount of LTTR remaining after curtailment:

14-10-2025 00:00 - 01:00 4056 MW

14-10-2025 01:00 - 02:00 4056 MW

14-10-2025 02:00 - 03:00 4056 MW

14-10-2025 03:00 - 04:00 4056 MW

14-10-2025 04:00 - 05:00 4056 MW

14-10-2025 05:00 - 06:00 4056 MW

14-10-2025 06:00 - 07:00 4056 MW

14-10-2025 07:00 - 08:00 4056 MW

14-10-2025 08:00 - 09:00 4056 MW

14-10-2025 09:00 - 10:00 4056 MW

14-10-2025 10:00 - 11:00 4056 MW

14-10-2025 11:00 - 12:00 4056 MW

14-10-2025 12:00 - 13:00 4056 MW

14-10-2025 13:00 - 14:00 4056 MW

14-10-2025 14:00 - 15:00 4056 MW

14-10-2025 15:00 - 16:00 4056 MW

14-10-2025 16:00 - 17:00 4056 MW

14-10-2025 17:00 - 18:00 4056 MW

14-10-2025 18:00 - 19:00 4056 MW

14-10-2025 19:00 - 20:00 4056 MW

14-10-2025 20:00 - 21:00 4056 MW

14-10-2025 21:00 - 22:00 4056 MW

14-10-2025 22:00 - 23:00 4056 MW

14-10-2025 23:00 - 24:00 4056 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)*:

ELERING

2. Identification of affected Long Term Transmission Rights:

EE-LV

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-10-2025 00:00 - 01:00 550 MW

13-10-2025 01:00 - 02:00 550 MW

13-10-2025 02:00 - 03:00 550 MW

13-10-2025 03:00 - 04:00 550 MW

13-10-2025 04:00 - 05:00 550 MW

13-10-2025 05:00 - 06:00 550 MW

13-10-2025 06:00 - 07:00 550 MW

5. Amount of LTTR remaining after curtailment:

13-10-2025 00:00 - 01:00 494 MW

13-10-2025 01:00 - 02:00 507 MW

13-10-2025 02:00 - 03:00 491 MW

13-10-2025 03:00 - 04:00 514 MW

13-10-2025 04:00 - 05:00 518 MW

13-10-2025 05:00 - 06:00 506 MW

13-10-2025 06:00 - 07:00 506 MW

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

Please see the latest day-ahead net transfer capacity values published on the Nord Pool UMM Platform under "Unavailability of electricity facilities: Transmission EE → LV" at

https://umm.nordpoolgroup.com/#/messages?publicationDate=all&eventDate=custom&connections=EE-LV&eventDateStart=1970-01-01&eventDateStop=2125-04-20 , as well as the capacity already allocated on the Baltic Balancing Market for balancing capacity sharing at https://baltic.transparency-dashboard.eu/node/108

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

There is no alternative to the curtailment of the affected LTTRs.

*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, ADMIE

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:

13-10-2025 00:00 - 01:00 50 MW

13-10-2025 01:00 - 02:00 50 MW

13-10-2025 02:00 - 03:00 50 MW

13-10-2025 03:00 - 04:00 50 MW

13-10-2025 04:00 - 05:00 50 MW

13-10-2025 05:00 - 06:00 50 MW

13-10-2025 06:00 - 07:00 50 MW

13-10-2025 07:00 - 08:00 50 MW

13-10-2025 08:00 - 09:00 50 MW

13-10-2025 09:00 - 10:00 50 MW

13-10-2025 10:00 - 11:00 50 MW

13-10-2025 11:00 - 12:00 50 MW

13-10-2025 12:00 - 13:00 50 MW

13-10-2025 13:00 - 14:00 50 MW

13-10-2025 14:00 - 15:00 50 MW

13-10-2025 15:00 - 16:00 50 MW

13-10-2025 16:00 - 17:00 50 MW

13-10-2025 17:00 - 18:00 50 MW

13-10-2025 18:00 - 19:00 50 MW

13-10-2025 19:00 - 20:00 50 MW

13-10-2025 20:00 - 21:00 50 MW

13-10-2025 21:00 - 22:00 50 MW

13-10-2025 22:00 - 23:00 50 MW

13-10-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:

13-10-2025 00:00 - 01:00 0 MW

13-10-2025 01:00 - 02:00 0 MW

13-10-2025 02:00 - 03:00 0 MW

13-10-2025 03:00 - 04:00 0 MW

13-10-2025 04:00 - 05:00 0 MW

13-10-2025 05:00 - 06:00 0 MW

13-10-2025 06:00 - 07:00 0 MW

13-10-2025 07:00 - 08:00 0 MW

13-10-2025 08:00 - 09:00 0 MW

13-10-2025 09:00 - 10:00 0 MW

13-10-2025 10:00 - 11:00 0 MW

13-10-2025 11:00 - 12:00 0 MW

13-10-2025 12:00 - 13:00 0 MW

13-10-2025 13:00 - 14:00 0 MW

13-10-2025 14:00 - 15:00 0 MW

13-10-2025 15:00 - 16:00 0 MW

13-10-2025 16:00 - 17:00 0 MW

13-10-2025 17:00 - 18:00 0 MW

13-10-2025 18:00 - 19:00 0 MW

13-10-2025 19:00 - 20:00 0 MW

13-10-2025 20:00 - 21:00 0 MW

13-10-2025 21:00 - 22:00 0 MW

13-10-2025 22:00 - 23:00 0 MW

13-10-2025 23:00 - 24:00 0 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, ADMIE

2. Identification of affected Long Term Transmission Rights:

IT-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-10-2025 00:00 - 01:00 50 MW

13-10-2025 01:00 - 02:00 50 MW

13-10-2025 02:00 - 03:00 50 MW

13-10-2025 03:00 - 04:00 50 MW

13-10-2025 04:00 - 05:00 50 MW

13-10-2025 05:00 - 06:00 50 MW

13-10-2025 06:00 - 07:00 50 MW

13-10-2025 07:00 - 08:00 50 MW

13-10-2025 08:00 - 09:00 50 MW

13-10-2025 09:00 - 10:00 50 MW

13-10-2025 10:00 - 11:00 50 MW

13-10-2025 11:00 - 12:00 50 MW

13-10-2025 12:00 - 13:00 50 MW

13-10-2025 13:00 - 14:00 50 MW

13-10-2025 14:00 - 15:00 50 MW

13-10-2025 15:00 - 16:00 50 MW

13-10-2025 16:00 - 17:00 50 MW

13-10-2025 17:00 - 18:00 50 MW

13-10-2025 18:00 - 19:00 50 MW

13-10-2025 19:00 - 20:00 50 MW

13-10-2025 20:00 - 21:00 50 MW

13-10-2025 21:00 - 22:00 50 MW

13-10-2025 22:00 - 23:00 50 MW

13-10-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:

13-10-2025 00:00 - 01:00 0 MW

13-10-2025 01:00 - 02:00 0 MW

13-10-2025 02:00 - 03:00 0 MW

13-10-2025 03:00 - 04:00 0 MW

13-10-2025 04:00 - 05:00 0 MW

13-10-2025 05:00 - 06:00 0 MW

13-10-2025 06:00 - 07:00 0 MW

13-10-2025 07:00 - 08:00 0 MW

13-10-2025 08:00 - 09:00 0 MW

13-10-2025 09:00 - 10:00 0 MW

13-10-2025 10:00 - 11:00 0 MW

13-10-2025 11:00 - 12:00 0 MW

13-10-2025 12:00 - 13:00 0 MW

13-10-2025 13:00 - 14:00 0 MW

13-10-2025 14:00 - 15:00 0 MW

13-10-2025 15:00 - 16:00 0 MW

13-10-2025 16:00 - 17:00 0 MW

13-10-2025 17:00 - 18:00 0 MW

13-10-2025 18:00 - 19:00 0 MW

13-10-2025 19:00 - 20:00 0 MW

13-10-2025 20:00 - 21:00 0 MW

13-10-2025 21:00 - 22:00 0 MW

13-10-2025 22:00 - 23:00 0 MW

13-10-2025 23:00 - 24:00 0 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:

IT-SI

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-10-2025 17:00 - 18:00 334 MW

13-10-2025 18:00 - 19:00 334 MW

13-10-2025 19:00 - 20:00 334 MW

13-10-2025 20:00 - 21:00 334 MW

13-10-2025 21:00 - 22:00 334 MW

5. Amount of LTTR remaining after curtailment:

13-10-2025 17:00 - 18:00 158 MW

13-10-2025 18:00 - 19:00 0 MW

13-10-2025 19:00 - 20:00 0 MW

13-10-2025 20:00 - 21:00 0 MW

13-10-2025 21:00 - 22:00 193 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, RTE

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:

13-10-2025 16:00 - 17:00 1493 MW

13-10-2025 17:00 - 18:00 1493 MW

13-10-2025 18:00 - 19:00 1493 MW

13-10-2025 19:00 - 20:00 1493 MW

13-10-2025 20:00 - 21:00 1493 MW

13-10-2025 21:00 - 22:00 1493 MW

13-10-2025 22:00 - 23:00 1493 MW

5. Amount of LTTR remaining after curtailment:

13-10-2025 16:00 - 17:00 1309 MW

13-10-2025 17:00 - 18:00 642 MW

13-10-2025 18:00 - 19:00 0 MW

13-10-2025 19:00 - 20:00 0 MW

13-10-2025 20:00 - 21:00 0 MW

13-10-2025 21:00 - 22:00 627 MW

13-10-2025 22:00 - 23:00 1272 MW

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:

IT-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-10-2025 17:00 - 18:00 71 MW

13-10-2025 18:00 - 19:00 71 MW

13-10-2025 19:00 - 20:00 71 MW

13-10-2025 20:00 - 21:00 71 MW

13-10-2025 21:00 - 22:00 71 MW

5. Amount of LTTR remaining after curtailment:

13-10-2025 17:00 - 18:00 40 MW

13-10-2025 18:00 - 19:00 0 MW

13-10-2025 19:00 - 20:00 0 MW

13-10-2025 20:00 - 21:00 0 MW

13-10-2025 21:00 - 22:00 40 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

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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