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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 ME-IT border for delivery period 01-11-2026

Published: 30/10/2026 | 13:52 by JAO
2026 Auction Calendar update

Published: 30/10/2026 | 13:45 by JAO
Capacity Curtailment on the DK-NL border for delivery period 01-11-2026

Published: 30/10/2026 | 13:10 by JAO
Capacity Curtailment on the NSL-GB-N2 border for delivery period 31-10-2026

Published: 30/10/2026 | 08:46 by JAO
Capacity Curtailment on the IT-GR border for delivery period 31-10-2026

Published: 30/10/2026 | 07:30 by JAO
Capacity Curtailment on the GR-IT border for delivery period 31-10-2026

Published: 30/10/2026 | 07:27 by JAO
Capacity Curtailment on the AT-IT border for delivery period 31-10-2026

Published: 30/10/2026 | 07:24 by JAO

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1. TSO(s)*:

CGES

2. Identification of affected Long Term Transmission Rights:

ME-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

01-11-2026 09:00 - 10:00 400 MW

01-11-2026 10:00 - 11:00 400 MW

01-11-2026 11:00 - 12:00 400 MW

01-11-2026 12:00 - 13:00 400 MW

01-11-2026 13:00 - 14:00 400 MW

01-11-2026 14:00 - 15:00 400 MW

5. Amount of LTTR remaining after curtailment:

01-11-2026 09:00 - 10:00 0 MW

01-11-2026 10:00 - 11:00 0 MW

01-11-2026 11:00 - 12:00 0 MW

01-11-2026 12:00 - 13:00 0 MW

01-11-2026 13:00 - 14:00 0 MW

01-11-2026 14:00 - 15:00 0 MW

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

HVDC Monita

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

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor VKL.

For more details please refer to the Auction Calendar on our webpage http://www.jao.eu/auctions#/calendar/table to find its latest version.

1. TSO(s)*:

TenneT_NL

2. Identification of affected Long Term Transmission Rights:

DK-NL

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

01-11-2026 07:00 - 08:00 199 MW

01-11-2026 08:00 - 09:00 199 MW

01-11-2026 09:00 - 10:00 199 MW

01-11-2026 10:00 - 11:00 199 MW

01-11-2026 11:00 - 12:00 199 MW

01-11-2026 12:00 - 13:00 199 MW

01-11-2026 13:00 - 14:00 199 MW

01-11-2026 14:00 - 15:00 199 MW

01-11-2026 15:00 - 16:00 199 MW

01-11-2026 16:00 - 17:00 199 MW

5. Amount of LTTR remaining after curtailment:

01-11-2026 07:00 - 08:00 0 MW

01-11-2026 08:00 - 09:00 0 MW

01-11-2026 09:00 - 10:00 0 MW

01-11-2026 10:00 - 11:00 0 MW

01-11-2026 11:00 - 12:00 0 MW

01-11-2026 12:00 - 13:00 0 MW

01-11-2026 13:00 - 14:00 0 MW

01-11-2026 14:00 - 15:00 0 MW

01-11-2026 15:00 - 16:00 0 MW

01-11-2026 16:00 - 17:00 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) *?

The remedial actions considered were assessed as not sufficient or ineffective to avoid the expected violation of operational security limit(s).

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and Statnett

2. Identification of affected Long Term Transmission Rights:

NSL-GB-N2

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

31-10-2026 16:00 - 17:00 50 MW

31-10-2026 17:00 - 18:00 50 MW

31-10-2026 18:00 - 19:00 50 MW

31-10-2026 19:00 - 20:00 50 MW

31-10-2026 20:00 - 21:00 50 MW

31-10-2026 21:00 - 22:00 50 MW

31-10-2026 22:00 - 23:00 50 MW

5. Amount of LTTR remaining after curtailment:

31-10-2026 16:00 - 17:00 0 MW

31-10-2026 17:00 - 18:00 0 MW

31-10-2026 18:00 - 19:00 0 MW

31-10-2026 19:00 - 20:00 0 MW

31-10-2026 20:00 - 21:00 0 MW

31-10-2026 21:00 - 22:00 0 MW

31-10-2026 22:00 - 23:00 0 MW

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

Thermal Limits

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

NTC restrictions

1. TSO(s)*:

TERNA

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:

31-10-2026 00:00 - 01:00 500 MW

31-10-2026 01:00 - 02:00 500 MW

31-10-2026 02:00 - 03:00 500 MW

31-10-2026 03:00 - 04:00 500 MW

31-10-2026 04:00 - 05:00 500 MW

31-10-2026 05:00 - 06:00 500 MW

31-10-2026 06:00 - 07:00 500 MW

31-10-2026 07:00 - 08:00 500 MW

31-10-2026 08:00 - 09:00 500 MW

31-10-2026 09:00 - 10:00 500 MW

31-10-2026 10:00 - 11:00 500 MW

31-10-2026 11:00 - 12:00 500 MW

31-10-2026 12:00 - 13:00 500 MW

31-10-2026 13:00 - 14:00 500 MW

31-10-2026 14:00 - 15:00 500 MW

31-10-2026 15:00 - 16:00 500 MW

31-10-2026 16:00 - 17:00 500 MW

31-10-2026 17:00 - 18:00 500 MW

31-10-2026 18:00 - 19:00 500 MW

31-10-2026 19:00 - 20:00 500 MW

31-10-2026 20:00 - 21:00 500 MW

31-10-2026 21:00 - 22:00 500 MW

31-10-2026 22:00 - 23:00 500 MW

31-10-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

31-10-2026 00:00 - 01:00 0 MW

31-10-2026 01:00 - 02:00 0 MW

31-10-2026 02:00 - 03:00 0 MW

31-10-2026 03:00 - 04:00 0 MW

31-10-2026 04:00 - 05:00 0 MW

31-10-2026 05:00 - 06:00 0 MW

31-10-2026 06:00 - 07:00 0 MW

31-10-2026 07:00 - 08:00 0 MW

31-10-2026 08:00 - 09:00 0 MW

31-10-2026 09:00 - 10:00 0 MW

31-10-2026 10:00 - 11:00 0 MW

31-10-2026 11:00 - 12:00 0 MW

31-10-2026 12:00 - 13:00 0 MW

31-10-2026 13:00 - 14:00 0 MW

31-10-2026 14:00 - 15:00 0 MW

31-10-2026 15:00 - 16:00 0 MW

31-10-2026 16:00 - 17:00 0 MW

31-10-2026 17:00 - 18:00 0 MW

31-10-2026 18:00 - 19:00 0 MW

31-10-2026 19:00 - 20:00 0 MW

31-10-2026 20:00 - 21:00 0 MW

31-10-2026 21:00 - 22:00 0 MW

31-10-2026 22:00 - 23:00 0 MW

31-10-2026 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*:

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:

GR-IT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

31-10-2026 00:00 - 01:00 500 MW

31-10-2026 01:00 - 02:00 500 MW

31-10-2026 02:00 - 03:00 500 MW

31-10-2026 03:00 - 04:00 500 MW

31-10-2026 04:00 - 05:00 500 MW

31-10-2026 05:00 - 06:00 500 MW

31-10-2026 06:00 - 07:00 500 MW

31-10-2026 07:00 - 08:00 500 MW

31-10-2026 08:00 - 09:00 500 MW

31-10-2026 09:00 - 10:00 500 MW

31-10-2026 10:00 - 11:00 500 MW

31-10-2026 11:00 - 12:00 500 MW

31-10-2026 12:00 - 13:00 500 MW

31-10-2026 13:00 - 14:00 500 MW

31-10-2026 14:00 - 15:00 500 MW

31-10-2026 15:00 - 16:00 500 MW

31-10-2026 16:00 - 17:00 500 MW

31-10-2026 17:00 - 18:00 500 MW

31-10-2026 18:00 - 19:00 500 MW

31-10-2026 19:00 - 20:00 500 MW

31-10-2026 20:00 - 21:00 500 MW

31-10-2026 21:00 - 22:00 500 MW

31-10-2026 22:00 - 23:00 500 MW

31-10-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

31-10-2026 00:00 - 01:00 0 MW

31-10-2026 01:00 - 02:00 0 MW

31-10-2026 02:00 - 03:00 0 MW

31-10-2026 03:00 - 04:00 0 MW

31-10-2026 04:00 - 05:00 0 MW

31-10-2026 05:00 - 06:00 0 MW

31-10-2026 06:00 - 07:00 0 MW

31-10-2026 07:00 - 08:00 0 MW

31-10-2026 08:00 - 09:00 0 MW

31-10-2026 09:00 - 10:00 0 MW

31-10-2026 10:00 - 11:00 0 MW

31-10-2026 11:00 - 12:00 0 MW

31-10-2026 12:00 - 13:00 0 MW

31-10-2026 13:00 - 14:00 0 MW

31-10-2026 14:00 - 15:00 0 MW

31-10-2026 15:00 - 16:00 0 MW

31-10-2026 16:00 - 17:00 0 MW

31-10-2026 17:00 - 18:00 0 MW

31-10-2026 18:00 - 19:00 0 MW

31-10-2026 19:00 - 20:00 0 MW

31-10-2026 20:00 - 21:00 0 MW

31-10-2026 21:00 - 22:00 0 MW

31-10-2026 22:00 - 23:00 0 MW

31-10-2026 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*:

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:

31-10-2026 00:00 - 01:00 222 MW

31-10-2026 01:00 - 02:00 222 MW

31-10-2026 02:00 - 03:00 222 MW

31-10-2026 03:00 - 04:00 222 MW

31-10-2026 04:00 - 05:00 222 MW

31-10-2026 05:00 - 06:00 222 MW

31-10-2026 06:00 - 07:00 222 MW

31-10-2026 07:00 - 08:00 222 MW

31-10-2026 08:00 - 09:00 222 MW

31-10-2026 09:00 - 10:00 222 MW

31-10-2026 10:00 - 11:00 222 MW

31-10-2026 11:00 - 12:00 222 MW

31-10-2026 12:00 - 13:00 222 MW

31-10-2026 13:00 - 14:00 222 MW

31-10-2026 14:00 - 15:00 222 MW

31-10-2026 15:00 - 16:00 222 MW

31-10-2026 16:00 - 17:00 222 MW

31-10-2026 17:00 - 18:00 222 MW

31-10-2026 18:00 - 19:00 222 MW

31-10-2026 19:00 - 20:00 222 MW

31-10-2026 20:00 - 21:00 222 MW

31-10-2026 21:00 - 22:00 222 MW

31-10-2026 22:00 - 23:00 222 MW

31-10-2026 23:00 - 24:00 222 MW

5. Amount of LTTR remaining after curtailment:

31-10-2026 00:00 - 01:00 173 MW

31-10-2026 01:00 - 02:00 173 MW

31-10-2026 02:00 - 03:00 173 MW

31-10-2026 03:00 - 04:00 172 MW

31-10-2026 04:00 - 05:00 172 MW

31-10-2026 05:00 - 06:00 172 MW

31-10-2026 06:00 - 07:00 172 MW

31-10-2026 07:00 - 08:00 169 MW

31-10-2026 08:00 - 09:00 169 MW

31-10-2026 09:00 - 10:00 169 MW

31-10-2026 10:00 - 11:00 169 MW

31-10-2026 11:00 - 12:00 169 MW

31-10-2026 12:00 - 13:00 169 MW

31-10-2026 13:00 - 14:00 169 MW

31-10-2026 14:00 - 15:00 169 MW

31-10-2026 15:00 - 16:00 155 MW

31-10-2026 16:00 - 17:00 155 MW

31-10-2026 17:00 - 18:00 155 MW

31-10-2026 18:00 - 19:00 175 MW

31-10-2026 19:00 - 20:00 179 MW

31-10-2026 20:00 - 21:00 179 MW

31-10-2026 21:00 - 22:00 179 MW

31-10-2026 22:00 - 23:00 188 MW

31-10-2026 23:00 - 24:00 171 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.

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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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