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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.

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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 FR-CH border for delivery period 28-07-2026

by JAO

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:

28-07-2026 00:00 - 01:00 370 MW

28-07-2026 01:00 - 02:00 370 MW

28-07-2026 02:00 - 03:00 370 MW

28-07-2026 03:00 - 04:00 370 MW

28-07-2026 04:00 - 05:00 370 MW

28-07-2026 05:00 - 06:00 370 MW

28-07-2026 06:00 - 07:00 370 MW

28-07-2026 07:00 - 08:00 370 MW

28-07-2026 08:00 - 09:00 370 MW

28-07-2026 09:00 - 10:00 370 MW

28-07-2026 10:00 - 11:00 370 MW

28-07-2026 11:00 - 12:00 370 MW

28-07-2026 12:00 - 13:00 370 MW

28-07-2026 13:00 - 14:00 370 MW

28-07-2026 14:00 - 15:00 370 MW

28-07-2026 15:00 - 16:00 370 MW

28-07-2026 16:00 - 17:00 370 MW

28-07-2026 17:00 - 18:00 370 MW

28-07-2026 18:00 - 19:00 370 MW

28-07-2026 19:00 - 20:00 370 MW

28-07-2026 20:00 - 21:00 370 MW

28-07-2026 21:00 - 22:00 370 MW

28-07-2026 22:00 - 23:00 370 MW

28-07-2026 23:00 - 24:00 370 MW

5. Amount of LTTR remaining after curtailment:

28-07-2026 00:00 - 01:00 0 MW

28-07-2026 01:00 - 02:00 0 MW

28-07-2026 02:00 - 03:00 0 MW

28-07-2026 03:00 - 04:00 0 MW

28-07-2026 04:00 - 05:00 0 MW

28-07-2026 05:00 - 06:00 0 MW

28-07-2026 06:00 - 07:00 0 MW

28-07-2026 07:00 - 08:00 0 MW

28-07-2026 08:00 - 09:00 0 MW

28-07-2026 09:00 - 10:00 0 MW

28-07-2026 10:00 - 11:00 0 MW

28-07-2026 11:00 - 12:00 0 MW

28-07-2026 12:00 - 13:00 0 MW

28-07-2026 13:00 - 14:00 0 MW

28-07-2026 14:00 - 15:00 0 MW

28-07-2026 15:00 - 16:00 0 MW

28-07-2026 16:00 - 17:00 0 MW

28-07-2026 17:00 - 18:00 0 MW

28-07-2026 18:00 - 19:00 0 MW

28-07-2026 19:00 - 20:00 0 MW

28-07-2026 20:00 - 21:00 0 MW

28-07-2026 21:00 - 22:00 0 MW

28-07-2026 22:00 - 23:00 0 MW

28-07-2026 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*:

28/07/2026

      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

*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 28-07-2026

by JAO

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:

28-07-2026 07:00 - 08:00 199 MW

28-07-2026 08:00 - 09:00 199 MW

28-07-2026 09:00 - 10:00 199 MW

28-07-2026 10:00 - 11:00 199 MW

28-07-2026 11:00 - 12:00 199 MW

28-07-2026 12:00 - 13:00 199 MW

28-07-2026 13:00 - 14:00 199 MW

28-07-2026 14:00 - 15:00 199 MW

28-07-2026 15:00 - 16:00 199 MW

28-07-2026 16:00 - 17:00 199 MW

5. Amount of LTTR remaining after curtailment:

28-07-2026 07:00 - 08:00 0 MW

28-07-2026 08:00 - 09:00 0 MW

28-07-2026 09:00 - 10:00 0 MW

28-07-2026 10:00 - 11:00 0 MW

28-07-2026 11:00 - 12:00 0 MW

28-07-2026 12:00 - 13:00 0 MW

28-07-2026 13:00 - 14:00 0 MW

28-07-2026 14:00 - 15:00 0 MW

28-07-2026 15:00 - 16:00 0 MW

28-07-2026 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).

Capacity Curtailment on the IT-GR border for delivery period 27-07-2026

by JAO

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:

27-07-2026 08:00 - 09:00 250 MW

27-07-2026 09:00 - 10:00 250 MW

27-07-2026 10:00 - 11:00 250 MW

27-07-2026 11:00 - 12:00 250 MW

27-07-2026 12:00 - 13:00 250 MW

27-07-2026 13:00 - 14:00 250 MW

27-07-2026 14:00 - 15:00 250 MW

27-07-2026 15:00 - 16:00 250 MW

27-07-2026 16:00 - 17:00 250 MW

27-07-2026 17:00 - 18:00 250 MW

27-07-2026 18:00 - 19:00 250 MW

27-07-2026 19:00 - 20:00 250 MW

27-07-2026 20:00 - 21:00 250 MW

27-07-2026 21:00 - 22:00 250 MW

27-07-2026 22:00 - 23:00 250 MW

27-07-2026 23:00 - 24:00 250 MW

5. Amount of LTTR remaining after curtailment:

27-07-2026 08:00 - 09:00 0 MW

27-07-2026 09:00 - 10:00 0 MW

27-07-2026 10:00 - 11:00 0 MW

27-07-2026 11:00 - 12:00 0 MW

27-07-2026 12:00 - 13:00 0 MW

27-07-2026 13:00 - 14:00 0 MW

27-07-2026 14:00 - 15:00 0 MW

27-07-2026 15:00 - 16:00 0 MW

27-07-2026 16:00 - 17:00 0 MW

27-07-2026 17:00 - 18:00 0 MW

27-07-2026 18:00 - 19:00 0 MW

27-07-2026 19:00 - 20:00 0 MW

27-07-2026 20:00 - 21:00 0 MW

27-07-2026 21:00 - 22:00 0 MW

27-07-2026 22:00 - 23:00 0 MW

27-07-2026 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*:

HVDC cable ARACTHOS – GALATINA


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

Not Applicable

Capacity Curtailment on the GR-IT border for delivery period 27-07-2026

by JAO

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:

27-07-2026 08:00 - 09:00 250 MW

27-07-2026 09:00 - 10:00 250 MW

27-07-2026 10:00 - 11:00 250 MW

27-07-2026 11:00 - 12:00 250 MW

27-07-2026 12:00 - 13:00 250 MW

27-07-2026 13:00 - 14:00 250 MW

27-07-2026 14:00 - 15:00 250 MW

27-07-2026 15:00 - 16:00 250 MW

27-07-2026 16:00 - 17:00 250 MW

27-07-2026 17:00 - 18:00 250 MW

27-07-2026 18:00 - 19:00 250 MW

27-07-2026 19:00 - 20:00 250 MW

27-07-2026 20:00 - 21:00 250 MW

27-07-2026 21:00 - 22:00 250 MW

27-07-2026 22:00 - 23:00 250 MW

27-07-2026 23:00 - 24:00 250 MW

5. Amount of LTTR remaining after curtailment:

27-07-2026 08:00 - 09:00 0 MW

27-07-2026 09:00 - 10:00 0 MW

27-07-2026 10:00 - 11:00 0 MW

27-07-2026 11:00 - 12:00 0 MW

27-07-2026 12:00 - 13:00 0 MW

27-07-2026 13:00 - 14:00 0 MW

27-07-2026 14:00 - 15:00 0 MW

27-07-2026 15:00 - 16:00 0 MW

27-07-2026 16:00 - 17:00 0 MW

27-07-2026 17:00 - 18:00 0 MW

27-07-2026 18:00 - 19:00 0 MW

27-07-2026 19:00 - 20:00 0 MW

27-07-2026 20:00 - 21:00 0 MW

27-07-2026 21:00 - 22:00 0 MW

27-07-2026 22:00 - 23:00 0 MW

27-07-2026 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*:

HVDC cable ARACTHOS – GALATINA


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

Not Applicable

Capacity Curtailment on the FR-ES border for delivery period 27-07-2026

by JAO

1. TSO(s)*:

RTE-TSO

2. Identification of affected Long Term Transmission Rights:

FR-ES

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

27-07-2026 09:00 - 10:00 1599 MW

27-07-2026 10:00 - 11:00 1599 MW

27-07-2026 11:00 - 12:00 1599 MW

27-07-2026 12:00 - 13:00 1599 MW

27-07-2026 13:00 - 14:00 1599 MW

27-07-2026 14:00 - 15:00 1599 MW

27-07-2026 15:00 - 16:00 1599 MW

27-07-2026 16:00 - 17:00 1599 MW

27-07-2026 17:00 - 18:00 1599 MW

27-07-2026 18:00 - 19:00 1599 MW

27-07-2026 19:00 - 20:00 1599 MW

27-07-2026 20:00 - 21:00 1599 MW

27-07-2026 21:00 - 22:00 1599 MW

27-07-2026 22:00 - 23:00 1599 MW

27-07-2026 23:00 - 24:00 1599 MW

5. Amount of LTTR remaining after curtailment:

27-07-2026 09:00 - 10:00 1462 MW

27-07-2026 10:00 - 11:00 1462 MW

27-07-2026 11:00 - 12:00 1462 MW

27-07-2026 12:00 - 13:00 1462 MW

27-07-2026 13:00 - 14:00 1462 MW

27-07-2026 14:00 - 15:00 1462 MW

27-07-2026 15:00 - 16:00 1462 MW

27-07-2026 16:00 - 17:00 1462 MW

27-07-2026 17:00 - 18:00 1462 MW

27-07-2026 18:00 - 19:00 1462 MW

27-07-2026 19:00 - 20:00 562 MW

27-07-2026 20:00 - 21:00 562 MW

27-07-2026 21:00 - 22:00 562 MW

27-07-2026 22:00 - 23:00 562 MW

27-07-2026 23:00 - 24:00 562 MW

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

27/07/2026

      09:00-10:00 BRAUD - CUBNEZAIS 4

      10:00-11:00 BRAUD - CUBNEZAIS 4

      11:00-12:00 BRAUD - CUBNEZAIS 4

      12:00-13:00 BRAUD - CUBNEZAIS 4

      13:00-14:00 BRAUD - CUBNEZAIS 4

      14:00-15:00 BRAUD - CUBNEZAIS 4

      15:00-16:00 BRAUD - CUBNEZAIS 4

      16:00-17:00 BRAUD - CUBNEZAIS 4

      17:00-18:00 BRAUD - CUBNEZAIS 4

      18:00-19:00 BRAUD - CUBNEZAIS 4

      19:00-20:00 BRAUD - CUBNEZAIS 4

      20:00-21:00 BRAUD - CUBNEZAIS 4

      21:00-22:00 BRAUD - CUBNEZAIS 4

      22:00-23:00 BRAUD - CUBNEZAIS 4

      23:00-24:00 BRAUD - CUBNEZAIS 4

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

*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 FR-CH border for delivery period 27-07-2026

by JAO

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:

27-07-2026 00:00 - 01:00 370 MW

27-07-2026 01:00 - 02:00 370 MW

27-07-2026 02:00 - 03:00 370 MW

27-07-2026 03:00 - 04:00 370 MW

27-07-2026 04:00 - 05:00 370 MW

27-07-2026 05:00 - 06:00 370 MW

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

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

27-07-2026 08:00 - 09:00 370 MW

27-07-2026 09:00 - 10:00 370 MW

27-07-2026 10:00 - 11:00 370 MW

27-07-2026 11:00 - 12:00 370 MW

27-07-2026 12:00 - 13:00 370 MW

27-07-2026 13:00 - 14:00 370 MW

27-07-2026 14:00 - 15:00 370 MW

27-07-2026 15:00 - 16:00 370 MW

27-07-2026 16:00 - 17:00 370 MW

27-07-2026 17:00 - 18:00 370 MW

27-07-2026 18:00 - 19:00 370 MW

27-07-2026 19:00 - 20:00 370 MW

27-07-2026 20:00 - 21:00 370 MW

27-07-2026 21:00 - 22:00 370 MW

27-07-2026 22:00 - 23:00 370 MW

27-07-2026 23:00 - 24:00 370 MW

5. Amount of LTTR remaining after curtailment:

27-07-2026 00:00 - 01:00 0 MW

27-07-2026 01:00 - 02:00 0 MW

27-07-2026 02:00 - 03:00 0 MW

27-07-2026 03:00 - 04:00 0 MW

27-07-2026 04:00 - 05:00 0 MW

27-07-2026 05:00 - 06:00 0 MW

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

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

27-07-2026 08:00 - 09:00 0 MW

27-07-2026 09:00 - 10:00 0 MW

27-07-2026 10:00 - 11:00 0 MW

27-07-2026 11:00 - 12:00 0 MW

27-07-2026 12:00 - 13:00 0 MW

27-07-2026 13:00 - 14:00 0 MW

27-07-2026 14:00 - 15:00 0 MW

27-07-2026 15:00 - 16:00 0 MW

27-07-2026 16:00 - 17:00 0 MW

27-07-2026 17:00 - 18:00 0 MW

27-07-2026 18:00 - 19:00 0 MW

27-07-2026 19:00 - 20:00 0 MW

27-07-2026 20:00 - 21:00 0 MW

27-07-2026 21:00 - 22:00 0 MW

27-07-2026 22:00 - 23:00 0 MW

27-07-2026 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*:

   27/07/2026

      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

Capacity Curtailment on the DK-NL border for delivery period 27-07-2026

by JAO

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:

27-07-2026 07:00 - 08:00 199 MW

27-07-2026 08:00 - 09:00 199 MW

27-07-2026 09:00 - 10:00 199 MW

27-07-2026 10:00 - 11:00 199 MW

27-07-2026 11:00 - 12:00 199 MW

27-07-2026 12:00 - 13:00 199 MW

27-07-2026 13:00 - 14:00 199 MW

27-07-2026 14:00 - 15:00 199 MW

27-07-2026 15:00 - 16:00 199 MW

27-07-2026 16:00 - 17:00 199 MW

5. Amount of LTTR remaining after curtailment:

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

27-07-2026 08:00 - 09:00 0 MW

27-07-2026 09:00 - 10:00 0 MW

27-07-2026 10:00 - 11:00 0 MW

27-07-2026 11:00 - 12:00 0 MW

27-07-2026 12:00 - 13:00 0 MW

27-07-2026 13:00 - 14:00 0 MW

27-07-2026 14:00 - 15:00 0 MW

27-07-2026 15:00 - 16:00 0 MW

27-07-2026 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).

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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