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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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UPDATE: Capacity Curtailment on the ME-IT border for delivery period 20-04-2026

Published: 18/04/2026 | 15:17 by JAO
Capacity Curtailment on the ME-IT border for delivery period 20-04-2026

Published: 18/04/2026 | 13:33 by JAO
UPDATE: Delay in Allocation Results and Program Authorisations Distribution

Published: 18/04/2026 | 12:18 by JAO
Delay in Allocation Results and Program Authorisations Distribution

Published: 18/04/2026 | 10:30 by JAO
Capacity Curtailment on the BG-GR border for delivery period 19-04-2026

Published: 18/04/2026 | 08:01 by JAO
Capacity Curtailment on the CH-IT border for delivery period 19-04-2026

Published: 18/04/2026 | 07:28 by JAO
Capacity Curtailment on the SI-IT border for delivery period 19-04-2026

Published: 18/04/2026 | 07:21 by JAO

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1. TSO(s)*:

TERNA

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:

20-04-2026 11:00 - 12:00 400 MW

20-04-2026 12:00 - 13:00 400 MW

20-04-2026 13:00 - 14:00 400 MW

20-04-2026 14:00 - 15:00 400 MW

5. Amount of LTTR remaining after curtailment:

20-04-2026 11:00 - 12:00 0 MW

20-04-2026 12:00 - 13:00 0 MW

20-04-2026 13:00 - 14:00 0 MW

20-04-2026 14:00 - 15:00 0 MW

5. Amount of LTTR remaining after curtailment:

20-04-2026 11:00 - 12:00 0 MW

20-04-2026 12:00 - 13:00 0 MW

20-04-2026 13:00 - 14:00 0 MW

20-04-2026 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*:

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

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:

20-04-2026 11:00 - 12:00 400 MW

20-04-2026 12:00 - 13:00 400 MW

20-04-2026 13:00 - 14:00 400 MW

20-04-2026 14:00 - 15:00 400 MW

5. Amount of LTTR remaining after curtailment:

20-04-2026 11:00 - 12:00 0 MW

20-04-2026 12:00 - 13:00 0 MW

20-04-2026 13:00 - 14:00 0 MW

20-04-2026 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*:

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

We are pleased to inform you that our Allocation Results and Program Authorisation Distribution services are available again, as the issue has been successfully resolved.

Please note that the Allocation Results and Program Authorisation distribution is delayed until further notice.

Please download from the trader UI.

Thank you for understanding,

JAO Operations

1. TSO(s)*:

IPTO (ADMIE) & ESO

2. Identification of affected Long Term Transmission Rights:

BG-GR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

19-04-2026 06:00 - 07:00 800 MW

19-04-2026 07:00 - 08:00 800 MW

19-04-2026 08:00 - 09:00 800 MW

19-04-2026 09:00 - 10:00 800 MW

19-04-2026 10:00 - 11:00 800 MW

19-04-2026 11:00 - 12:00 800 MW

19-04-2026 12:00 - 13:00 800 MW

19-04-2026 13:00 - 14:00 800 MW

19-04-2026 14:00 - 15:00 800 MW

5. Amount of LTTR remaining after curtailment:

19-04-2026 06:00 - 07:00 483 MW

19-04-2026 07:00 - 08:00 483 MW

19-04-2026 08:00 - 09:00 483 MW

19-04-2026 09:00 - 10:00 483 MW

19-04-2026 10:00 - 11:00 483 MW

19-04-2026 11:00 - 12:00 483 MW

19-04-2026 12:00 - 13:00 483 MW

19-04-2026 13:00 - 14:00 483 MW

19-04-2026 14:00 - 15:00 483 MW

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

Operational security reasons.

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.

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:

19-04-2026 10:00 - 11:00 282 MW

19-04-2026 11:00 - 12:00 282 MW

19-04-2026 12:00 - 13:00 282 MW

19-04-2026 13:00 - 14:00 282 MW

19-04-2026 14:00 - 15:00 282 MW

19-04-2026 15:00 - 16:00 282 MW

19-04-2026 16:00 - 17:00 282 MW

5. Amount of LTTR remaining after curtailment:

19-04-2026 10:00 - 11:00 0 MW

19-04-2026 11:00 - 12:00 0 MW

19-04-2026 12:00 - 13:00 0 MW

19-04-2026 13:00 - 14:00 0 MW

19-04-2026 14:00 - 15:00 0 MW

19-04-2026 15:00 - 16:00 0 MW

19-04-2026 16:00 - 17:00 0 MW

1. TSO(s)*:

TERNA & ELES

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:

19-04-2026 10:00 - 11:00 59 MW

19-04-2026 11:00 - 12:00 59 MW

19-04-2026 12:00 - 13:00 59 MW

19-04-2026 13:00 - 14:00 59 MW

19-04-2026 14:00 - 15:00 59 MW

19-04-2026 15:00 - 16:00 59 MW

19-04-2026 16:00 - 17:00 59 MW

5. Amount of LTTR remaining after curtailment:

19-04-2026 10:00 - 11:00 3 MW

19-04-2026 11:00 - 12:00 3 MW

19-04-2026 12:00 - 13:00 3 MW

19-04-2026 13:00 - 14:00 3 MW

19-04-2026 14:00 - 15:00 3 MW

19-04-2026 15:00 - 16:00 3 MW

19-04-2026 16:00 - 17:00 3 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

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.

Go to registration