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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 09-05-2026

Published: 08/05/2026 | 08:09 by JAO
Capacity Curtailment on the FR-IT border for delivery period 09-05-2026

Published: 08/05/2026 | 07:58 by JAO
Capacity Curtailment on the SI-IT border for delivery period 09-05-2026

Published: 08/05/2026 | 07:57 by JAO
Capacity Curtailment on the IT-FR border for delivery period 09-05-2026

Published: 08/05/2026 | 07:56 by JAO
Capacity Curtailment on the AT-IT border for delivery period 09-05-2026

Published: 08/05/2026 | 07:55 by JAO
Capacity Curtailment on the ES-FR border for delivery period 09-05-2026

Published: 08/05/2026 | 07:46 by JAO
Delay in the publication of data - Publication Tool

Published: 07/05/2026 | 16:24 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:

09-05-2026 11:00 - 12:00 282 MW

09-05-2026 12:00 - 13:00 282 MW

09-05-2026 13:00 - 14:00 282 MW

09-05-2026 14:00 - 15:00 282 MW

09-05-2026 15:00 - 16:00 282 MW

5. Amount of LTTR remaining after curtailment:

09-05-2026 11:00 - 12:00 0 MW

09-05-2026 12:00 - 13:00 0 MW

09-05-2026 13:00 - 14:00 0 MW

09-05-2026 14:00 - 15:00 0 MW

09-05-2026 15:00 - 16:00 0 MW

1. TSO(s)*:

TERNA

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:

09-05-2026 11:00 - 12:00 451 MW

09-05-2026 12:00 - 13:00 451 MW

09-05-2026 13:00 - 14:00 451 MW

09-05-2026 14:00 - 15:00 451 MW

09-05-2026 15:00 - 16:00 451 MW

09-05-2026 16:00 - 17:00 451 MW

5. Amount of LTTR remaining after curtailment:

09-05-2026 11:00 - 12:00 17 MW

09-05-2026 12:00 - 13:00 17 MW

09-05-2026 13:00 - 14:00 17 MW

09-05-2026 14:00 - 15:00 17 MW

09-05-2026 15:00 - 16:00 17 MW

09-05-2026 16:00 - 17:00 414 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

1. TSO(s)*:

TERNA

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:

09-05-2026 10:00 - 11:00 59 MW

09-05-2026 11:00 - 12:00 59 MW

09-05-2026 12:00 - 13:00 59 MW

09-05-2026 13:00 - 14:00 59 MW

09-05-2026 14:00 - 15:00 59 MW

09-05-2026 15:00 - 16:00 59 MW

09-05-2026 16:00 - 17:00 59 MW

5. Amount of LTTR remaining after curtailment:

09-05-2026 10:00 - 11:00 36 MW

09-05-2026 11:00 - 12:00 1 MW

09-05-2026 12:00 - 13:00 3 MW

09-05-2026 13:00 - 14:00 3 MW

09-05-2026 14:00 - 15:00 3 MW

09-05-2026 15:00 - 16:00 1 MW

09-05-2026 16:00 - 17:00 49 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

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:

09-05-2026 07:00 - 08:00 1370 MW

09-05-2026 08:00 - 09:00 1370 MW

09-05-2026 09:00 - 10:00 1370 MW

09-05-2026 10:00 - 11:00 1370 MW

09-05-2026 11:00 - 12:00 1370 MW

09-05-2026 15:00 - 16:00 1370 MW

09-05-2026 16:00 - 17:00 1370 MW

5. Amount of LTTR remaining after curtailment:

09-05-2026 07:00 - 08:00 1318 MW

09-05-2026 08:00 - 09:00 1318 MW

09-05-2026 09:00 - 10:00 1298 MW

09-05-2026 10:00 - 11:00 1298 MW

09-05-2026 11:00 - 12:00 1298 MW

09-05-2026 15:00 - 16:00 1310 MW

09-05-2026 16:00 - 17:00 1310 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

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:

09-05-2026 10:00 - 11:00 71 MW

09-05-2026 11:00 - 12:00 71 MW

09-05-2026 12:00 - 13:00 71 MW

09-05-2026 13:00 - 14:00 71 MW

09-05-2026 14:00 - 15:00 71 MW

09-05-2026 15:00 - 16:00 71 MW

09-05-2026 16:00 - 17:00 71 MW

5. Amount of LTTR remaining after curtailment:

09-05-2026 10:00 - 11:00 55 MW

09-05-2026 11:00 - 12:00 55 MW

09-05-2026 12:00 - 13:00 55 MW

09-05-2026 13:00 - 14:00 55 MW

09-05-2026 14:00 - 15:00 55 MW

09-05-2026 15:00 - 16:00 55 MW

09-05-2026 16:00 - 17:00 55 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

1. TSO(s)*:

RTE-TSO

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:

09-05-2026 11:00 - 12:00 680 MW

09-05-2026 12:00 - 13:00 680 MW

09-05-2026 13:00 - 14:00 680 MW

09-05-2026 14:00 - 15:00 680 MW

09-05-2026 15:00 - 16:00 680 MW

09-05-2026 16:00 - 17:00 680 MW

5. Amount of LTTR remaining after curtailment:

09-05-2026 11:00 - 12:00 481 MW

09-05-2026 12:00 - 13:00 481 MW

09-05-2026 13:00 - 14:00 481 MW

09-05-2026 14:00 - 15:00 481 MW

09-05-2026 15:00 - 16:00 481 MW

09-05-2026 16:00 - 17:00 481 MW

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

09/05/2026

11:00-12:00 BRAUD-PREGUILLAC 2

12:00-13:00 BRAUD-PREGUILLAC 2

13:00-14:00 BRAUD-PREGUILLAC 2

14:00-15:00 BRAUD-PREGUILLAC 2

15:00-16:00 BRAUD-PREGUILLAC 2

16:00-17:00 BRAUD-PREGUILLAC 2

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

Due to an ongoing deployment, please note that there will be delays in the data publication.

Thank you for your understanding.

Best regards,

Operations Team

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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