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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.

 

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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
OPS
  • 500+
    Registered market participants
  • 26k+
    Auctions held annually
  • 100%
    Auction tool availability
  • 80+
    Employees
  • 50
    TSOs serviced

Latest market messages

Capacity Curtailment on the ME-IT border for delivery period 06-04-2026

by JAO

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:

06-04-2026 00:00 - 01:00 400 MW

06-04-2026 01:00 - 02:00 400 MW

06-04-2026 02:00 - 03:00 400 MW

06-04-2026 03:00 - 04:00 400 MW

06-04-2026 04:00 - 05:00 400 MW

06-04-2026 05:00 - 06:00 400 MW

06-04-2026 06:00 - 07:00 400 MW

06-04-2026 07:00 - 08:00 400 MW

06-04-2026 08:00 - 09:00 400 MW

06-04-2026 09:00 - 10:00 400 MW

06-04-2026 10:00 - 11:00 400 MW

06-04-2026 11:00 - 12:00 400 MW

06-04-2026 12:00 - 13:00 400 MW

06-04-2026 13:00 - 14:00 400 MW

06-04-2026 14:00 - 15:00 400 MW

06-04-2026 15:00 - 16:00 400 MW

06-04-2026 16:00 - 17:00 400 MW

06-04-2026 17:00 - 18:00 400 MW

5. Amount of LTTR remaining after curtailment:

06-04-2026 00:00 - 01:00 0 MW

06-04-2026 01:00 - 02:00 0 MW

06-04-2026 02:00 - 03:00 0 MW

06-04-2026 03:00 - 04:00 0 MW

06-04-2026 04:00 - 05:00 0 MW

06-04-2026 05:00 - 06:00 0 MW

06-04-2026 06:00 - 07:00 0 MW

06-04-2026 07:00 - 08:00 0 MW

06-04-2026 08:00 - 09:00 0 MW

06-04-2026 09:00 - 10:00 0 MW

06-04-2026 10:00 - 11:00 0 MW

06-04-2026 11:00 - 12:00 0 MW

06-04-2026 12:00 - 13:00 0 MW

06-04-2026 13:00 - 14:00 0 MW

06-04-2026 14:00 - 15:00 0 MW

06-04-2026 15:00 - 16:00 0 MW

06-04-2026 16:00 - 17:00 0 MW

06-04-2026 17:00 - 18:00 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

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

Capacity Curtailment on the DK-NL border for delivery period 06-04-2026

by JAO

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:

06-04-2026 09:00 - 10:00 199 MW

06-04-2026 10:00 - 11:00 199 MW

06-04-2026 11:00 - 12:00 199 MW

06-04-2026 12:00 - 13:00 199 MW

06-04-2026 13:00 - 14:00 199 MW

06-04-2026 14:00 - 15:00 199 MW

06-04-2026 15:00 - 16:00 199 MW

06-04-2026 16:00 - 17:00 199 MW

06-04-2026 17:00 - 18:00 199 MW

5. Amount of LTTR remaining after curtailment:

06-04-2026 09:00 - 10:00 0 MW

06-04-2026 10:00 - 11:00 0 MW

06-04-2026 11:00 - 12:00 0 MW

06-04-2026 12:00 - 13:00 0 MW

06-04-2026 13:00 - 14:00 0 MW

06-04-2026 14:00 - 15:00 0 MW

06-04-2026 15:00 - 16:00 0 MW

06-04-2026 16:00 - 17:00 0 MW

06-04-2026 17:00 - 18:00 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

Capacity Curtailment on the IF2-FR-GB border for delivery period 18-04-2026

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

2. Identification of affected Long Term Transmission Rights:

IF2-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

18-04-2026 10:00 - 11:00 948 MW

18-04-2026 11:00 - 12:00 948 MW

18-04-2026 12:00 - 13:00 948 MW

18-04-2026 13:00 - 14:00 948 MW

18-04-2026 14:00 - 15:00 948 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 10:00 - 11:00 0 MW

18-04-2026 11:00 - 12:00 0 MW

18-04-2026 12:00 - 13:00 0 MW

18-04-2026 13:00 - 14:00 0 MW

18-04-2026 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*:

Thermal Limits

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

Capacity limitation due to planned maintenance

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

Capacity Curtailment on the IF2-GB-FR border for delivery period 18-04-2026

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

2. Identification of affected Long Term Transmission Rights:

IF2-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

18-04-2026 10:00 - 11:00 945 MW

18-04-2026 11:00 - 12:00 945 MW

18-04-2026 12:00 - 13:00 945 MW

18-04-2026 13:00 - 14:00 945 MW

18-04-2026 14:00 - 15:00 945 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 10:00 - 11:00 0 MW

18-04-2026 11:00 - 12:00 0 MW

18-04-2026 12:00 - 13:00 0 MW

18-04-2026 13:00 - 14:00 0 MW

18-04-2026 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*:

Thermal Limits

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

Capacity limitation due to planned maintenance

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

Capacity Curtailment on the IF1-GB-FR border for delivery period 18-04-2026

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

2. Identification of affected Long Term Transmission Rights:

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

18-04-2026 00:00 - 01:00 1738 MW

18-04-2026 01:00 - 02:00 1738 MW

18-04-2026 02:00 - 03:00 1738 MW

18-04-2026 03:00 - 04:00 1738 MW

18-04-2026 04:00 - 05:00 1738 MW

18-04-2026 05:00 - 06:00 1738 MW

18-04-2026 06:00 - 07:00 1738 MW

18-04-2026 07:00 - 08:00 1738 MW

18-04-2026 08:00 - 09:00 1738 MW

18-04-2026 09:00 - 10:00 1738 MW

18-04-2026 10:00 - 11:00 1738 MW

18-04-2026 11:00 - 12:00 1738 MW

18-04-2026 12:00 - 13:00 1738 MW

18-04-2026 13:00 - 14:00 1738 MW

18-04-2026 14:00 - 15:00 1738 MW

18-04-2026 15:00 - 16:00 1738 MW

18-04-2026 16:00 - 17:00 1738 MW

18-04-2026 17:00 - 18:00 1738 MW

18-04-2026 18:00 - 19:00 1738 MW

18-04-2026 19:00 - 20:00 1738 MW

18-04-2026 20:00 - 21:00 1738 MW

18-04-2026 21:00 - 22:00 1738 MW

18-04-2026 22:00 - 23:00 1738 MW

18-04-2026 23:00 - 24:00 1738 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 00:00 - 01:00 1435 MW

18-04-2026 01:00 - 02:00 1435 MW

18-04-2026 02:00 - 03:00 1435 MW

18-04-2026 03:00 - 04:00 1435 MW

18-04-2026 04:00 - 05:00 1435 MW

18-04-2026 05:00 - 06:00 1435 MW

18-04-2026 06:00 - 07:00 1435 MW

18-04-2026 07:00 - 08:00 1435 MW

18-04-2026 08:00 - 09:00 1435 MW

18-04-2026 09:00 - 10:00 1435 MW

18-04-2026 10:00 - 11:00 1435 MW

18-04-2026 11:00 - 12:00 1435 MW

18-04-2026 12:00 - 13:00 1435 MW

18-04-2026 13:00 - 14:00 1435 MW

18-04-2026 14:00 - 15:00 1435 MW

18-04-2026 15:00 - 16:00 1435 MW

18-04-2026 16:00 - 17:00 1435 MW

18-04-2026 17:00 - 18:00 1435 MW

18-04-2026 18:00 - 19:00 1435 MW

18-04-2026 19:00 - 20:00 1435 MW

18-04-2026 20:00 - 21:00 1435 MW

18-04-2026 21:00 - 22:00 1435 MW

18-04-2026 22:00 - 23:00 1435 MW

18-04-2026 23:00 - 24:00 1435 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)*?

Capacity limitation due to unplanned maintenance

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

Capacity Curtailment on the IF1-FR-GB border for delivery period 18-04-2026

by JAO

1. TSO(s)*:

National Grid Interconnectors Limited (NGIC) and RTE EDF Transport S.A. (RTE)

2. Identification of affected Long Term Transmission Rights:

IF1-FR-GB

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

18-04-2026 00:00 - 01:00 1750 MW

18-04-2026 01:00 - 02:00 1750 MW

18-04-2026 02:00 - 03:00 1750 MW

18-04-2026 03:00 - 04:00 1750 MW

18-04-2026 04:00 - 05:00 1750 MW

18-04-2026 05:00 - 06:00 1750 MW

18-04-2026 06:00 - 07:00 1750 MW

18-04-2026 07:00 - 08:00 1750 MW

18-04-2026 08:00 - 09:00 1750 MW

18-04-2026 09:00 - 10:00 1750 MW

18-04-2026 10:00 - 11:00 1750 MW

18-04-2026 11:00 - 12:00 1750 MW

18-04-2026 12:00 - 13:00 1750 MW

18-04-2026 13:00 - 14:00 1750 MW

18-04-2026 14:00 - 15:00 1750 MW

18-04-2026 15:00 - 16:00 1750 MW

18-04-2026 16:00 - 17:00 1750 MW

18-04-2026 17:00 - 18:00 1750 MW

18-04-2026 18:00 - 19:00 1750 MW

18-04-2026 19:00 - 20:00 1750 MW

18-04-2026 20:00 - 21:00 1750 MW

18-04-2026 21:00 - 22:00 1750 MW

18-04-2026 22:00 - 23:00 1750 MW

18-04-2026 23:00 - 24:00 1750 MW

5. Amount of LTTR remaining after curtailment:

18-04-2026 00:00 - 01:00 1464 MW

18-04-2026 01:00 - 02:00 1464 MW

18-04-2026 02:00 - 03:00 1464 MW

18-04-2026 03:00 - 04:00 1464 MW

18-04-2026 04:00 - 05:00 1464 MW

18-04-2026 05:00 - 06:00 1464 MW

18-04-2026 06:00 - 07:00 1464 MW

18-04-2026 07:00 - 08:00 1464 MW

18-04-2026 08:00 - 09:00 1464 MW

18-04-2026 09:00 - 10:00 1464 MW

18-04-2026 10:00 - 11:00 1464 MW

18-04-2026 11:00 - 12:00 1464 MW

18-04-2026 12:00 - 13:00 1464 MW

18-04-2026 13:00 - 14:00 1464 MW

18-04-2026 14:00 - 15:00 1464 MW

18-04-2026 15:00 - 16:00 1464 MW

18-04-2026 16:00 - 17:00 1464 MW

18-04-2026 17:00 - 18:00 1464 MW

18-04-2026 18:00 - 19:00 1464 MW

18-04-2026 19:00 - 20:00 1464 MW

18-04-2026 20:00 - 21:00 1464 MW

18-04-2026 21:00 - 22:00 1464 MW

18-04-2026 22:00 - 23:00 1464 MW

18-04-2026 23:00 - 24:00 1464 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)*?

Capacity limitation due to unplanned maintenance

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

Capacity Curtailment on the CH-IT border for delivery period 05-04-2026

by JAO

1. TSO(s)*:
TERNA

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

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:
05-04-2026 00:00 - 01:00 6197 MW 
05-04-2026 01:00 - 02:00 6097 MW 
05-04-2026 02:00 - 03:00 6077 MW 
05-04-2026 03:00 - 04:00 6077 MW 
05-04-2026 04:00 - 05:00 6077 MW 
05-04-2026 05:00 - 06:00 6077 MW 
05-04-2026 06:00 - 07:00 5915 MW 
05-04-2026 07:00 - 08:00 5377 MW 
05-04-2026 08:00 - 09:00 4748 MW 
05-04-2026 09:00 - 10:00 4748 MW 
05-04-2026 10:00 - 11:00 4747 MW 
05-04-2026 11:00 - 12:00 4747 MW 
05-04-2026 12:00 - 13:00 4748 MW 
05-04-2026 13:00 - 14:00 4743 MW 
05-04-2026 14:00 - 15:00 4747 MW 
05-04-2026 15:00 - 16:00 4652 MW 
05-04-2026 16:00 - 17:00 4747 MW 
05-04-2026 17:00 - 18:00 4748 MW 
05-04-2026 18:00 - 19:00 5408 MW 
05-04-2026 19:00 - 20:00 5916 MW 
05-04-2026 20:00 - 21:00 5937 MW 
05-04-2026 21:00 - 22:00 5937 MW 
05-04-2026 22:00 - 23:00 5937 MW 
05-04-2026 23:00 - 24:00 5937 MW

5. Amount of LTTR remaining after curtailment:
05-04-2026 00:00 - 01:00 6197 MW 
05-04-2026 01:00 - 02:00 6097 MW 
05-04-2026 02:00 - 03:00 6077 MW 
05-04-2026 03:00 - 04:00 6077 MW 
05-04-2026 04:00 - 05:00 6077 MW 
05-04-2026 05:00 - 06:00 6077 MW 
05-04-2026 06:00 - 07:00 5915 MW 
05-04-2026 07:00 - 08:00 5377 MW 
05-04-2026 08:00 - 09:00 4748 MW 
05-04-2026 09:00 - 10:00 4748 MW 
05-04-2026 10:00 - 11:00 4747 MW 
05-04-2026 11:00 - 12:00 4747 MW 
05-04-2026 12:00 - 13:00 4748 MW 
05-04-2026 13:00 - 14:00 4743 MW 
05-04-2026 14:00 - 15:00 4747 MW 
05-04-2026 15:00 - 16:00 4652 MW 
05-04-2026 16:00 - 17:00 4747 MW 
05-04-2026 17:00 - 18:00 4748 MW 
05-04-2026 18:00 - 19:00 5408 MW 
05-04-2026 19:00 - 20:00 5916 MW 
05-04-2026 20:00 - 21:00 5937 MW 
05-04-2026 21:00 - 22:00 5937 MW 
05-04-2026 22:00 - 23:00 5937 MW 
05-04-2026 23:00 - 24:00 5937 MW

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. 

ISO
IT

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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