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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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2027 Yearly Auction Calendar

Published: 25/10/2026 | 17:43 by JAO
Capacity Curtailment on the FR-CH border for delivery period 27-10-2026

Published: 25/10/2026 | 17:28 by JAO
Capacity Curtailment on the DK-NL border for delivery period 27-10-2026

Published: 25/10/2026 | 14:40 by JAO
Capacity Curtailment on the NL-DK border for delivery period 27-10-2026

Published: 25/10/2026 | 14:38 by JAO
Capacity Curtailment on the ES-FR border for delivery period 26-10-2026

Published: 25/10/2026 | 01:44 by JAO
Capacity Curtailment on the FR-CH border for delivery period 26-10-2026

Published: 24/10/2026 | 18:45 by JAO
Delay in PUTO Platform Publication

Published: 24/10/2026 | 14:11 by JAO

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Dear Market Participants,

We are pleased to inform you that the 2027 Yearly Auction Calendar has been published.

To allow you additional time to prepare and organize the necessary collateral, we have included the Yearly Auctions for 2027 in a separate tab within the current 2026 Auction Calendar.

Please note that the complete 2027 Auction Calendar, including the other Long-Term Auctions, will be published in the upcoming weeks.

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

Best regards,

JAO Operations Team

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

FR-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-10-2026 00:00 - 01:00 370 MW

27-10-2026 01:00 - 02:00 370 MW

27-10-2026 02:00 - 03:00 370 MW

27-10-2026 03:00 - 04:00 370 MW

27-10-2026 04:00 - 05:00 370 MW

27-10-2026 05:00 - 06:00 370 MW

27-10-2026 06:00 - 07:00 370 MW

27-10-2026 07:00 - 08:00 370 MW

27-10-2026 08:00 - 09:00 370 MW

27-10-2026 09:00 - 10:00 370 MW

27-10-2026 10:00 - 11:00 370 MW

27-10-2026 11:00 - 12:00 370 MW

27-10-2026 12:00 - 13:00 370 MW

27-10-2026 13:00 - 14:00 370 MW

27-10-2026 14:00 - 15:00 370 MW

27-10-2026 15:00 - 16:00 370 MW

27-10-2026 16:00 - 17:00 370 MW

27-10-2026 17:00 - 18:00 370 MW

27-10-2026 18:00 - 19:00 370 MW

27-10-2026 19:00 - 20:00 370 MW

27-10-2026 20:00 - 21:00 370 MW

27-10-2026 21:00 - 22:00 370 MW

27-10-2026 22:00 - 23:00 370 MW

27-10-2026 23:00 - 24:00 370 MW

5. Amount of LTTR remaining after curtailment:

27-10-2026 00:00 - 01:00 0 MW

27-10-2026 01:00 - 02:00 0 MW

27-10-2026 02:00 - 03:00 0 MW

27-10-2026 03:00 - 04:00 0 MW

27-10-2026 04:00 - 05:00 0 MW

27-10-2026 05:00 - 06:00 0 MW

27-10-2026 06:00 - 07:00 0 MW

27-10-2026 07:00 - 08:00 0 MW

27-10-2026 08:00 - 09:00 0 MW

27-10-2026 09:00 - 10:00 0 MW

27-10-2026 10:00 - 11:00 0 MW

27-10-2026 11:00 - 12:00 0 MW

27-10-2026 12:00 - 13:00 0 MW

27-10-2026 13:00 - 14:00 0 MW

27-10-2026 14:00 - 15:00 0 MW

27-10-2026 15:00 - 16:00 0 MW

27-10-2026 16:00 - 17:00 0 MW

27-10-2026 17:00 - 18:00 0 MW

27-10-2026 18:00 - 19:00 0 MW

27-10-2026 19:00 - 20:00 0 MW

27-10-2026 20:00 - 21:00 0 MW

27-10-2026 21:00 - 22:00 0 MW

27-10-2026 22:00 - 23:00 0 MW

27-10-2026 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*:

27/10/2026

00:00-01:00 Network Security

01:00-02:00 Network Security

02:00-03:00 Network Security

03:00-04:00 Network Security

04:00-05:00 Network Security

05:00-06:00 Network Security

06:00-07:00 Network Security

07:00-08:00 Network Security

08:00-09:00 Network Security

09:00-10:00 Network Security

10:00-11:00 Network Security

11:00-12:00 Network Security

12:00-13:00 Network Security

13:00-14:00 Network Security

14:00-15:00 Network Security

15:00-16:00 Network Security

16:00-17:00 Network Security

17:00-18:00 Network Security

18:00-19:00 Network Security

19:00-20:00 Network Security

20:00-21:00 Network Security

21:00-22:00 Network Security

22:00-23:00 Network Security

23:00-24:00 Network Security

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

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:

27-10-2026 00:00 - 01:00 60 MW

27-10-2026 01:00 - 02:00 60 MW

27-10-2026 02:00 - 03:00 60 MW

27-10-2026 03:00 - 04:00 60 MW

27-10-2026 04:00 - 05:00 60 MW

27-10-2026 05:00 - 06:00 60 MW

27-10-2026 06:00 - 07:00 60 MW

27-10-2026 07:00 - 08:00 60 MW

27-10-2026 08:00 - 09:00 60 MW

27-10-2026 09:00 - 10:00 60 MW

27-10-2026 10:00 - 11:00 60 MW

27-10-2026 11:00 - 12:00 60 MW

27-10-2026 12:00 - 13:00 60 MW

27-10-2026 13:00 - 14:00 60 MW

27-10-2026 14:00 - 15:00 60 MW

27-10-2026 15:00 - 16:00 60 MW

27-10-2026 16:00 - 17:00 60 MW

27-10-2026 17:00 - 18:00 60 MW

27-10-2026 18:00 - 19:00 60 MW

27-10-2026 19:00 - 20:00 60 MW

27-10-2026 20:00 - 21:00 60 MW

27-10-2026 21:00 - 22:00 60 MW

27-10-2026 22:00 - 23:00 60 MW

27-10-2026 23:00 - 24:00 60 MW

5. Amount of LTTR remaining after curtailment:

27-10-2026 00:00 - 01:00 0 MW

27-10-2026 01:00 - 02:00 0 MW

27-10-2026 02:00 - 03:00 0 MW

27-10-2026 03:00 - 04:00 0 MW

27-10-2026 04:00 - 05:00 0 MW

27-10-2026 05:00 - 06:00 0 MW

27-10-2026 06:00 - 07:00 0 MW

27-10-2026 07:00 - 08:00 0 MW

27-10-2026 08:00 - 09:00 0 MW

27-10-2026 09:00 - 10:00 0 MW

27-10-2026 10:00 - 11:00 0 MW

27-10-2026 11:00 - 12:00 0 MW

27-10-2026 12:00 - 13:00 0 MW

27-10-2026 13:00 - 14:00 0 MW

27-10-2026 14:00 - 15:00 0 MW

27-10-2026 15:00 - 16:00 0 MW

27-10-2026 16:00 - 17:00 0 MW

27-10-2026 17:00 - 18:00 0 MW

27-10-2026 18:00 - 19:00 0 MW

27-10-2026 19:00 - 20:00 0 MW

27-10-2026 20:00 - 21:00 0 MW

27-10-2026 21:00 - 22:00 0 MW

27-10-2026 22:00 - 23:00 0 MW

27-10-2026 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*:

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).

*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)*:

TenneT TSO B.V.

2. Identification of affected Long Term Transmission Rights:

NL-DK

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-10-2026 00:00 - 01:00 60 MW

27-10-2026 01:00 - 02:00 60 MW

27-10-2026 02:00 - 03:00 60 MW

27-10-2026 03:00 - 04:00 60 MW

27-10-2026 04:00 - 05:00 60 MW

27-10-2026 05:00 - 06:00 60 MW

27-10-2026 06:00 - 07:00 60 MW

27-10-2026 07:00 - 08:00 60 MW

27-10-2026 08:00 - 09:00 60 MW

27-10-2026 09:00 - 10:00 60 MW

27-10-2026 10:00 - 11:00 60 MW

27-10-2026 11:00 - 12:00 60 MW

27-10-2026 12:00 - 13:00 60 MW

27-10-2026 13:00 - 14:00 60 MW

27-10-2026 14:00 - 15:00 60 MW

27-10-2026 15:00 - 16:00 60 MW

27-10-2026 16:00 - 17:00 60 MW

27-10-2026 17:00 - 18:00 60 MW

27-10-2026 18:00 - 19:00 60 MW

27-10-2026 19:00 - 20:00 60 MW

27-10-2026 20:00 - 21:00 60 MW

27-10-2026 21:00 - 22:00 60 MW

27-10-2026 22:00 - 23:00 60 MW

27-10-2026 23:00 - 24:00 60 MW

5. Amount of LTTR remaining after curtailment:

27-10-2026 00:00 - 01:00 0 MW

27-10-2026 01:00 - 02:00 0 MW

27-10-2026 02:00 - 03:00 0 MW

27-10-2026 03:00 - 04:00 0 MW

27-10-2026 04:00 - 05:00 0 MW

27-10-2026 05:00 - 06:00 0 MW

27-10-2026 06:00 - 07:00 0 MW

27-10-2026 07:00 - 08:00 0 MW

27-10-2026 08:00 - 09:00 0 MW

27-10-2026 09:00 - 10:00 0 MW

27-10-2026 10:00 - 11:00 0 MW

27-10-2026 11:00 - 12:00 0 MW

27-10-2026 12:00 - 13:00 0 MW

27-10-2026 13:00 - 14:00 0 MW

27-10-2026 14:00 - 15:00 0 MW

27-10-2026 15:00 - 16:00 0 MW

27-10-2026 16:00 - 17:00 0 MW

27-10-2026 17:00 - 18:00 0 MW

27-10-2026 18:00 - 19:00 0 MW

27-10-2026 19:00 - 20:00 0 MW

27-10-2026 20:00 - 21:00 0 MW

27-10-2026 21:00 - 22:00 0 MW

27-10-2026 22:00 - 23:00 0 MW

27-10-2026 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*:

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).

*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:

26-10-2026 09:00 - 10:00 1030 MW

26-10-2026 10:00 - 11:00 1030 MW

26-10-2026 11:00 - 12:00 1030 MW

26-10-2026 12:00 - 13:00 1030 MW

26-10-2026 13:00 - 14:00 1030 MW

26-10-2026 14:00 - 15:00 1030 MW

26-10-2026 15:00 - 16:00 1030 MW

26-10-2026 16:00 - 17:00 1030 MW

26-10-2026 17:00 - 18:00 1030 MW

5. Amount of LTTR remaining after curtailment:

26-10-2026 09:00 - 10:00 769 MW

26-10-2026 10:00 - 11:00 769 MW

26-10-2026 11:00 - 12:00 274 MW

26-10-2026 12:00 - 13:00 274 MW

26-10-2026 13:00 - 14:00 274 MW

26-10-2026 14:00 - 15:00 274 MW

26-10-2026 15:00 - 16:00 274 MW

26-10-2026 16:00 - 17:00 769 MW

26-10-2026 17:00 - 18:00 769 MW

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

26/10/2026

09:00-10:00 Dambron - Verger

10:00-11:00 Dambron - Verger

11:00-12:00 Dambron - Verger

12:00-13:00 Dambron - Verger

13:00-14:00 Dambron - Verger

14:00-15:00 Dambron - Verger

15:00-16:00 Dambron - Verger

16:00-17:00 Dambron - Verger

17:00-18:00 Dambron - Verger

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

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

FR-CH

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

26-10-2026 00:00 - 01:00 370 MW

26-10-2026 01:00 - 02:00 370 MW

26-10-2026 02:00 - 03:00 370 MW

26-10-2026 03:00 - 04:00 370 MW

26-10-2026 04:00 - 05:00 370 MW

26-10-2026 05:00 - 06:00 370 MW

26-10-2026 06:00 - 07:00 370 MW

26-10-2026 07:00 - 08:00 370 MW

26-10-2026 08:00 - 09:00 370 MW

26-10-2026 09:00 - 10:00 370 MW

26-10-2026 10:00 - 11:00 370 MW

26-10-2026 11:00 - 12:00 370 MW

26-10-2026 12:00 - 13:00 370 MW

26-10-2026 13:00 - 14:00 370 MW

26-10-2026 14:00 - 15:00 370 MW

26-10-2026 15:00 - 16:00 370 MW

26-10-2026 16:00 - 17:00 370 MW

26-10-2026 17:00 - 18:00 370 MW

26-10-2026 18:00 - 19:00 370 MW

26-10-2026 19:00 - 20:00 370 MW

26-10-2026 20:00 - 21:00 370 MW

26-10-2026 21:00 - 22:00 370 MW

26-10-2026 22:00 - 23:00 370 MW

26-10-2026 23:00 - 24:00 370 MW

5. Amount of LTTR remaining after curtailment:

26-10-2026 00:00 - 01:00 0 MW

26-10-2026 01:00 - 02:00 0 MW

26-10-2026 02:00 - 03:00 0 MW

26-10-2026 03:00 - 04:00 0 MW

26-10-2026 04:00 - 05:00 0 MW

26-10-2026 05:00 - 06:00 0 MW

26-10-2026 06:00 - 07:00 0 MW

26-10-2026 07:00 - 08:00 0 MW

26-10-2026 08:00 - 09:00 0 MW

26-10-2026 09:00 - 10:00 0 MW

26-10-2026 10:00 - 11:00 0 MW

26-10-2026 11:00 - 12:00 0 MW

26-10-2026 12:00 - 13:00 0 MW

26-10-2026 13:00 - 14:00 0 MW

26-10-2026 14:00 - 15:00 0 MW

26-10-2026 15:00 - 16:00 0 MW

26-10-2026 16:00 - 17:00 0 MW

26-10-2026 17:00 - 18:00 0 MW

26-10-2026 18:00 - 19:00 0 MW

26-10-2026 19:00 - 20:00 0 MW

26-10-2026 20:00 - 21:00 0 MW

26-10-2026 21:00 - 22:00 0 MW

26-10-2026 22:00 - 23:00 0 MW

26-10-2026 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*:

26/10/2026

00:00-01:00 Network Security

01:00-02:00 Network Security

02:00-03:00 Network Security

03:00-04:00 Network Security

04:00-05:00 Network Security

05:00-06:00 Network Security

06:00-07:00 Network Security

07:00-08:00 Network Security

08:00-09:00 Network Security

09:00-10:00 Network Security

10:00-11:00 Network Security

11:00-12:00 Network Security

12:00-13:00 Network Security

13:00-14:00 Network Security

14:00-15:00 Network Security

15:00-16:00 Network Security

16:00-17:00 Network Security

17:00-18:00 Network Security

18:00-19:00 Network Security

19:00-20:00 Network Security

20:00-21:00 Network Security

21:00-22:00 Network Security

22:00-23:00 Network Security

23:00-24:00 Network Security

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

Please be informed that the information for the Core CCR area for business day 25/10/2026 will be published later than planned on the PUTO platform.

We will make the information available as soon as possible

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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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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