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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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2026 Auction Calendar update

Published: 29/10/2026 | 14:14 by JAO
Capacity Curtailment on the DK-NL border for delivery period 31-10-2026

Published: 29/10/2026 | 13:22 by JAO
Capacity Curtailment on the NLL-BE-GB border for delivery period 31-10-2026

Published: 29/10/2026 | 12:59 by JAO
Capacity Curtailment on the NLL-GB-BE border for delivery period 31-10-2026

Published: 29/10/2026 | 12:57 by JAO
Capacity Curtailment on the NSL-GB-N2 border for delivery period 30-10-2026

Published: 29/10/2026 | 08:34 by JAO
Capacity Curtailment on the IT-CH border for delivery period 30-10-2026

Published: 29/10/2026 | 07:24 by JAO
Capacity Curtailment on the IT-SI border for delivery period 30-10-2026

Published: 29/10/2026 | 07:23 by JAO

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We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridors IFA1 and 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 TSO B.V.

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:

31-10-2026 07:00 - 08:00 199 MW

31-10-2026 08:00 - 09:00 199 MW

31-10-2026 09:00 - 10:00 199 MW

31-10-2026 10:00 - 11:00 199 MW

31-10-2026 11:00 - 12:00 199 MW

31-10-2026 12:00 - 13:00 199 MW

31-10-2026 13:00 - 14:00 199 MW

31-10-2026 14:00 - 15:00 199 MW

31-10-2026 15:00 - 16:00 199 MW

31-10-2026 16:00 - 17:00 199 MW

5. Amount of LTTR remaining after curtailment:

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

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)*:

Nemo Link Limited

2. Identification of affected Long Term Transmission Rights:

NLL-BE-GB

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 - 01:00 725 MW

31-10-2026 01:00 - 02:00 725 MW

31-10-2026 02:00 - 03:00 725 MW

31-10-2026 03:00 - 04:00 725 MW

31-10-2026 04:00 - 05:00 725 MW

31-10-2026 05:00 - 06:00 725 MW

31-10-2026 06:00 - 07:00 725 MW

31-10-2026 07:00 - 08:00 725 MW

31-10-2026 08:00 - 09:00 725 MW

31-10-2026 09:00 - 10:00 725 MW

31-10-2026 10:00 - 11:00 725 MW

31-10-2026 11:00 - 12:00 725 MW

31-10-2026 12:00 - 13:00 725 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

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

This concerns a planned maintenance intervention on the Nemo Link installations

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

This concerns a planned maintenance intervention on the Nemo Link installations

*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)*:

Nemo Link Limited

2. Identification of affected Long Term Transmission Rights:

NLL-GB-BE

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 - 01:00 724 MW

31-10-2026 01:00 - 02:00 724 MW

31-10-2026 02:00 - 03:00 724 MW

31-10-2026 03:00 - 04:00 724 MW

31-10-2026 04:00 - 05:00 724 MW

31-10-2026 05:00 - 06:00 724 MW

31-10-2026 06:00 - 07:00 724 MW

31-10-2026 07:00 - 08:00 724 MW

31-10-2026 08:00 - 09:00 724 MW

31-10-2026 09:00 - 10:00 724 MW

31-10-2026 10:00 - 11:00 724 MW

31-10-2026 11:00 - 12:00 724 MW

31-10-2026 12:00 - 13:00 724 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

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

This concerns a planned maintenance intervention on the Nemo Link installations

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

This concerns a planned maintenance intervention on the Nemo Link installations

*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)*:

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:

30-10-2026 16:00 - 17:00 50 MW

30-10-2026 17:00 - 18:00 50 MW

30-10-2026 18:00 - 19:00 50 MW

30-10-2026 19:00 - 20:00 50 MW

30-10-2026 20:00 - 21:00 50 MW

30-10-2026 21:00 - 22:00 50 MW

30-10-2026 22:00 - 23:00 50 MW

5. Amount of LTTR remaining after curtailment:

30-10-2026 16:00 - 17:00 0 MW

30-10-2026 17:00 - 18:00 0 MW

30-10-2026 18:00 - 19:00 0 MW

30-10-2026 19:00 - 20:00 0 MW

30-10-2026 20:00 - 21:00 0 MW

30-10-2026 21:00 - 22:00 0 MW

30-10-2026 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-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

30-10-2026 17:00 - 18:00 925 MW

30-10-2026 18:00 - 19:00 925 MW

30-10-2026 19:00 - 20:00 925 MW

5. Amount of LTTR remaining after curtailment:

30-10-2026 17:00 - 18:00 464 MW

30-10-2026 18:00 - 19:00 462 MW

30-10-2026 19:00 - 20:00 462 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-SI

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

30-10-2026 17:00 - 18:00 334 MW

30-10-2026 18:00 - 19:00 334 MW

30-10-2026 19:00 - 20:00 334 MW

5. Amount of LTTR remaining after curtailment:

30-10-2026 17:00 - 18:00 0 MW

30-10-2026 18:00 - 19:00 0 MW

30-10-2026 19:00 - 20:00 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

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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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