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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

470+

Registered Market Participants
20k+

Auctions per year
100 %

Auction Tool Availability
95

Employees
50

TSOs serviced

Latest market messages

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Capacity Curtailment on the DK-NL and NL-DK border for delivery period 07-05-2025

Published: 05/05/2025 | 14:29 by JAO
Banking Holiday: Friday, 9 May 2025 – Impact on Transactions and Credit Limit Updates

Published: 05/05/2025 | 08:43 by JAO
Capacity curtailment on the corridors GR<>IT, SI-IT, CH-IT for BD 06/05

Published: 05/05/2025 | 07:43 by JAO
Capacity Curtailment on the ES-FR border for delivery period 06-05-2025

Published: 04/05/2025 | 22:42 by JAO
Publication of IDCC (b) data for Business Day 05/05/2025

Published: 04/05/2025 | 22:38 by JAO
Capacity Curtailment on the CH-FR border for delivery period 06-05-2025

Published: 04/05/2025 | 17:36 by JAO
Capacity Curtailment on the DK-NL and NL-DK border for delivery period 06-05-2025

Published: 04/05/2025 | 12:40 by JAO

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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:
DK<>NL
07-05-2025 00:00 - 01:00 180 MW
07-05-2025 01:00 - 02:00 180 MW
07-05-2025 02:00 - 03:00 180 MW
07-05-2025 03:00 - 04:00 180 MW
07-05-2025 04:00 - 05:00 180 MW
07-05-2025 05:00 - 06:00 180 MW
07-05-2025 06:00 - 07:00 180 MW
07-05-2025 07:00 - 08:00 180 MW
07-05-2025 08:00 - 09:00 180 MW
07-05-2025 09:00 - 10:00 180 MW
07-05-2025 10:00 - 11:00 180 MW
07-05-2025 11:00 - 12:00 180 MW
07-05-2025 12:00 - 13:00 180 MW
07-05-2025 13:00 - 14:00 180 MW
07-05-2025 14:00 - 15:00 180 MW
07-05-2025 15:00 - 16:00 180 MW
07-05-2025 16:00 - 17:00 180 MW

5. Amount of LTTR remaining after curtailment:
DK<>NL
07-05-2025 00:00 - 01:00 0 MW
07-05-2025 01:00 - 02:00 0 MW
07-05-2025 02:00 - 03:00 0 MW
07-05-2025 03:00 - 04:00 0 MW
07-05-2025 04:00 - 05:00 0 MW
07-05-2025 05:00 - 06:00 0 MW
07-05-2025 06:00 - 07:00 0 MW
07-05-2025 07:00 - 08:00 0 MW
07-05-2025 08:00 - 09:00 0 MW
07-05-2025 09:00 - 10:00 0 MW
07-05-2025 10:00 - 11:00 0 MW
07-05-2025 11:00 - 12:00 0 MW
07-05-2025 12:00 - 13:00 0 MW
07-05-2025 13:00 - 14:00 0 MW
07-05-2025 14:00 - 15:00 0 MW
07-05-2025 15:00 - 16:00 0 MW
07-05-2025 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).

*According to section 57.3 of the EU HAR, this field can be filled in within 24 hours after the initial publication

Dear Market Participant,

Please be advised that Friday, 9 May 2025, is a banking holiday in Luxembourg (Europe Day). This holiday applies solely to the banking sector, and JAO will continue to operate as usual, like any other weekday.

Please note that any credit limit update resulting from transactions on your ING business account will not be reflected until Monday, 13 May 2025.

Additionally, transactions initiated after ING Luxembourg's cutoff time on Thursday, 8 May 2025, will have a value date of Monday, 12 May 2025.

We kindly recommend that you adjust your financial schedule accordingly to accommodate these changes.

Best regards,
JAO Operations Team

Capacity Curtailment on the GR-IT & IT-GR border for delivery period 06-05-2025

1. TSO(s)*:
TERNA

2. Identification of affected Long Term Transmission Rights:
GR-IT & IT-GR

3. Triggering event:
Curtailment to ensure operation remains within Operational Security Limits

4. Affected volume in MW / hour for each concerned period:
06-05-2025 00:00 - 01:00 50 MW
06-05-2025 01:00 - 02:00 50 MW
06-05-2025 02:00 - 03:00 50 MW
06-05-2025 03:00 - 04:00 50 MW
06-05-2025 04:00 - 05:00 50 MW
06-05-2025 05:00 - 06:00 50 MW
06-05-2025 06:00 - 07:00 50 MW
06-05-2025 07:00 - 08:00 50 MW
06-05-2025 08:00 - 09:00 50 MW
06-05-2025 09:00 - 10:00 50 MW
06-05-2025 10:00 - 11:00 50 MW
06-05-2025 11:00 - 12:00 50 MW
06-05-2025 12:00 - 13:00 50 MW
06-05-2025 13:00 - 14:00 50 MW
06-05-2025 14:00 - 15:00 50 MW
06-05-2025 15:00 - 16:00 50 MW
06-05-2025 16:00 - 17:00 50 MW
06-05-2025 17:00 - 18:00 50 MW
06-05-2025 18:00 - 19:00 50 MW
06-05-2025 19:00 - 20:00 50 MW
06-05-2025 20:00 - 21:00 50 MW
06-05-2025 21:00 - 22:00 50 MW
06-05-2025 22:00 - 23:00 50 MW
06-05-2025 23:00 - 24:00 50 MW

5. Amount of LTTR remaining after curtailment:
06-05-2025 00:00 - 01:00 0 MW
06-05-2025 01:00 - 02:00 0 MW
06-05-2025 02:00 - 03:00 0 MW
06-05-2025 03:00 - 04:00 0 MW
06-05-2025 04:00 - 05:00 0 MW
06-05-2025 05:00 - 06:00 0 MW
06-05-2025 06:00 - 07:00 0 MW
06-05-2025 07:00 - 08:00 0 MW
06-05-2025 08:00 - 09:00 0 MW
06-05-2025 09:00 - 10:00 0 MW
06-05-2025 10:00 - 11:00 0 MW
06-05-2025 11:00 - 12:00 0 MW
06-05-2025 12:00 - 13:00 0 MW
06-05-2025 13:00 - 14:00 0 MW
06-05-2025 14:00 - 15:00 0 MW
06-05-2025 15:00 - 16:00 0 MW
06-05-2025 16:00 - 17:00 0 MW
06-05-2025 17:00 - 18:00 0 MW
06-05-2025 18:00 - 19:00 0 MW
06-05-2025 19:00 - 20:00 0 MW
06-05-2025 20:00 - 21:00 0 MW
06-05-2025 21:00 - 22:00 0 MW
06-05-2025 22:00 - 23:00 0 MW
06-05-2025 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*:

HVDC cable ARACTHOS – GALATINA
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

Capacity Curtailment on the SI-IT border for delivery period 06-05-2025

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:
06-05-2025 18:00 - 19:00 230 MW
06-05-2025 19:00 - 20:00 230 MW
06-05-2025 20:00 - 21:00 230 MW
06-05-2025 23:00 - 24:00 230 MW

5. Amount of LTTR remaining after curtailment:
06-05-2025 18:00 - 19:00 202 MW
06-05-2025 19:00 - 20:00 202 MW
06-05-2025 20:00 - 21:00 202 MW
06-05-2025 23:00 - 24:00 205 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

Capacity Curtailment on the CH-IT border for delivery period 06-05-2025

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:
06-05-2025 11:00 - 12:00 1723 MW
06-05-2025 15:00 - 16:00 1723 MW
06-05-2025 16:00 - 17:00 1723 MW

5. Amount of LTTR remaining after curtailment:
06-05-2025 11:00 - 12:00 1660 MW
06-05-2025 15:00 - 16:00 1660 MW
06-05-2025 16:00 - 17:00 1660 MW

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:

06-05-2025 10:00 - 11:00 1339 MW

06-05-2025 11:00 - 12:00 1339 MW

06-05-2025 12:00 - 13:00 1339 MW

06-05-2025 13:00 - 14:00 1339 MW

06-05-2025 14:00 - 15:00 1339 MW

06-05-2025 15:00 - 16:00 1339 MW

06-05-2025 16:00 - 17:00 1339 MW

06-05-2025 17:00 - 18:00 1339 MW

5. Amount of LTTR remaining after curtailment:

06-05-2025 10:00 - 11:00 967 MW

06-05-2025 11:00 - 12:00 967 MW

06-05-2025 12:00 - 13:00 967 MW

06-05-2025 13:00 - 14:00 967 MW

06-05-2025 14:00 - 15:00 967 MW

06-05-2025 15:00 - 16:00 967 MW

06-05-2025 16:00 - 17:00 967 MW

06-05-2025 17:00 - 18:00 967 MW

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

BRAUD-GRANZAY-PREGUILLAC

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

Dear Market Participants,

We would like to inform you that missing data for the delivery date of 05/05/2025, for the Core ID CCR IDCC (b) will be published with a delay.

Thank you for your understanding.

Best regards,

JAO Operations Team

1. TSO(s)*:

SWISSGRID

2. Identification of affected Long Term Transmission Rights:

CH-FR

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:

06-05-2025 07:00 - 08:00 350 MW

5. Amount of LTTR remaining after curtailment:

06-05-2025 07:00 - 08:00 225 MW

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:

DK-NL

06-05-2025 07:00 - 08:00 180 MW

06-05-2025 08:00 - 09:00 180 MW

06-05-2025 09:00 - 10:00 180 MW

06-05-2025 10:00 - 11:00 180 MW

06-05-2025 11:00 - 12:00 180 MW

06-05-2025 12:00 - 13:00 180 MW

06-05-2025 13:00 - 14:00 180 MW

06-05-2025 14:00 - 15:00 180 MW

06-05-2025 15:00 - 16:00 180 MW

06-05-2025 16:00 - 17:00 180 MW

06-05-2025 17:00 - 18:00 180 MW

06-05-2025 18:00 - 19:00 180 MW

06-05-2025 19:00 - 20:00 180 MW

06-05-2025 20:00 - 21:00 180 MW

06-05-2025 21:00 - 22:00 180 MW

06-05-2025 22:00 - 23:00 180 MW

06-05-2025 23:00 - 24:00 180 MW

NL-DK

06-05-2025 07:00 - 08:00 180 MW

06-05-2025 08:00 - 09:00 180 MW

06-05-2025 09:00 - 10:00 180 MW

06-05-2025 10:00 - 11:00 180 MW

06-05-2025 11:00 - 12:00 180 MW

06-05-2025 12:00 - 13:00 180 MW

06-05-2025 13:00 - 14:00 180 MW

06-05-2025 14:00 - 15:00 180 MW

06-05-2025 15:00 - 16:00 180 MW

06-05-2025 16:00 - 17:00 180 MW

06-05-2025 17:00 - 18:00 180 MW

06-05-2025 18:00 - 19:00 180 MW

06-05-2025 19:00 - 20:00 180 MW

06-05-2025 20:00 - 21:00 180 MW

06-05-2025 21:00 - 22:00 180 MW

06-05-2025 22:00 - 23:00 180 MW

06-05-2025 23:00 - 24:00 180 MW

5. Amount of LTTR remaining after curtailment:

DK-NL

06-05-2025 07:00 - 08:00 0 MW

06-05-2025 08:00 - 09:00 0 MW

06-05-2025 09:00 - 10:00 0 MW

06-05-2025 10:00 - 11:00 0 MW

06-05-2025 11:00 - 12:00 0 MW

06-05-2025 12:00 - 13:00 0 MW

06-05-2025 13:00 - 14:00 0 MW

06-05-2025 14:00 - 15:00 0 MW

06-05-2025 15:00 - 16:00 0 MW

06-05-2025 16:00 - 17:00 0 MW

06-05-2025 17:00 - 18:00 0 MW

06-05-2025 18:00 - 19:00 0 MW

06-05-2025 19:00 - 20:00 0 MW

06-05-2025 20:00 - 21:00 0 MW

06-05-2025 21:00 - 22:00 0 MW

06-05-2025 22:00 - 23:00 0 MW

06-05-2025 23:00 - 24:00 0 MW

NL-DK

06-05-2025 07:00 - 08:00 0 MW

06-05-2025 08:00 - 09:00 0 MW

06-05-2025 09:00 - 10:00 0 MW

06-05-2025 10:00 - 11:00 0 MW

06-05-2025 11:00 - 12:00 0 MW

06-05-2025 12:00 - 13:00 0 MW

06-05-2025 13:00 - 14:00 0 MW

06-05-2025 14:00 - 15:00 0 MW

06-05-2025 15:00 - 16:00 0 MW

06-05-2025 16:00 - 17:00 0 MW

06-05-2025 17:00 - 18:00 0 MW

06-05-2025 18:00 - 19:00 0 MW

06-05-2025 19:00 - 20:00 0 MW

06-05-2025 20:00 - 21:00 0 MW

06-05-2025 21:00 - 22:00 0 MW

06-05-2025 22:00 - 23:00 0 MW

06-05-2025 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)*?

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

Resource Center

This section contains key information for market participants such as user guides, forms, auction rules, nomination deadlines and other documents.

Go to resources

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.

Get to know us

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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