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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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Capacity Curtailment on the ES-FR border for delivery period 22-04-2026

Published: 20/04/2026 | 22:19 by JAO
Capacity Curtailment on the IF1-GB-FR border for delivery period 22-04-2026

Published: 20/04/2026 | 15:39 by JAO
Capacity Curtailment on the IF1-FR-GB border for delivery period 22-04-2026

Published: 20/04/2026 | 15:38 by JAO
Capacity Curtailment on the BG-GR border for delivery period 21-04-2026

Published: 20/04/2026 | 07:33 by JAO
Capacity Curtailment on the GR-IT border for delivery period 21-04-2026

Published: 20/04/2026 | 07:22 by JAO
Capacity Curtailment on the IT-GR border for delivery period 21-04-2026

Published: 20/04/2026 | 07:22 by JAO
Capacity Curtailment on the ES-FR border for delivery period 21-04-2026

Published: 20/04/2026 | 07:19 by JAO

Go to Message board

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:

22-04-2026 00:00 - 01:00 150 MW

22-04-2026 01:00 - 02:00 150 MW

22-04-2026 02:00 - 03:00 150 MW

22-04-2026 03:00 - 04:00 150 MW

22-04-2026 04:00 - 05:00 150 MW

22-04-2026 05:00 - 06:00 150 MW

22-04-2026 06:00 - 07:00 150 MW

22-04-2026 07:00 - 08:00 150 MW

22-04-2026 08:00 - 09:00 150 MW

22-04-2026 09:00 - 10:00 150 MW

22-04-2026 10:00 - 11:00 150 MW

22-04-2026 11:00 - 12:00 150 MW

22-04-2026 12:00 - 13:00 150 MW

22-04-2026 13:00 - 14:00 150 MW

22-04-2026 14:00 - 15:00 150 MW

22-04-2026 15:00 - 16:00 150 MW

22-04-2026 16:00 - 17:00 150 MW

22-04-2026 17:00 - 18:00 150 MW

22-04-2026 18:00 - 19:00 150 MW

22-04-2026 19:00 - 20:00 150 MW

22-04-2026 20:00 - 21:00 150 MW

22-04-2026 21:00 - 22:00 150 MW

22-04-2026 22:00 - 23:00 150 MW

22-04-2026 23:00 - 24:00 150 MW

5. Amount of LTTR remaining after curtailment:

22-04-2026 00:00 - 01:00 0 MW

22-04-2026 01:00 - 02:00 0 MW

22-04-2026 02:00 - 03:00 0 MW

22-04-2026 03:00 - 04:00 0 MW

22-04-2026 04:00 - 05:00 0 MW

22-04-2026 05:00 - 06:00 0 MW

22-04-2026 06:00 - 07:00 0 MW

22-04-2026 07:00 - 08:00 0 MW

22-04-2026 08:00 - 09:00 0 MW

22-04-2026 09:00 - 10:00 0 MW

22-04-2026 10:00 - 11:00 0 MW

22-04-2026 11:00 - 12:00 0 MW

22-04-2026 12:00 - 13:00 0 MW

22-04-2026 13:00 - 14:00 0 MW

22-04-2026 14:00 - 15:00 0 MW

22-04-2026 15:00 - 16:00 0 MW

22-04-2026 16:00 - 17:00 0 MW

22-04-2026 17:00 - 18:00 0 MW

22-04-2026 18:00 - 19:00 0 MW

22-04-2026 19:00 - 20:00 0 MW

22-04-2026 20:00 - 21:00 0 MW

22-04-2026 21:00 - 22:00 0 MW

22-04-2026 22:00 - 23:00 0 MW

22-04-2026 23:00 - 24:00 0 MW

6. Information on exact operational limit(s) that are expected to be violated in the absence of curtailment :
22/04/2026
00:00-01:00 FLEAC - BRIOUX
01:00-02:00 FLEAC - BRIOUX
02:00-03:00 FLEAC - BRIOUX
03:00-04:00 FLEAC - BRIOUX
04:00-05:00 FLEAC - BRIOUX
05:00-06:00 FLEAC - BRIOUX
06:00-07:00 FLEAC - BRIOUX
07:00-08:00 FLEAC - BRIOUX
08:00-09:00 FLEAC - BRIOUX
09:00-10:00 FLEAC - BRIOUX
10:00-11:00 FLEAC - BRIOUX
11:00-12:00 FLEAC - BRIOUX
12:00-13:00 FLEAC - BRIOUX
13:00-14:00 FLEAC - BRIOUX
14:00-15:00 FLEAC - BRIOUX
15:00-16:00 FLEAC - BRIOUX
16:00-17:00 FLEAC - BRIOUX
17:00-18:00 FLEAC - BRIOUX
18:00-19:00 FLEAC - BRIOUX
19:00-20:00 FLEAC - BRIOUX
20:00-21:00 FLEAC - BRIOUX
21:00-22:00 FLEAC - BRIOUX
22:00-23:00 FLEAC - BRIOUX
23:00-24:00 FLEAC - BRIOUX
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)*:

RNP

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:

22-04-2026 00:00 - 01:00 996 MW

22-04-2026 01:00 - 02:00 996 MW

22-04-2026 02:00 - 03:00 996 MW

22-04-2026 03:00 - 04:00 996 MW

22-04-2026 04:00 - 05:00 996 MW

22-04-2026 05:00 - 06:00 996 MW

22-04-2026 06:00 - 07:00 996 MW

22-04-2026 07:00 - 08:00 996 MW

22-04-2026 08:00 - 09:00 996 MW

22-04-2026 09:00 - 10:00 996 MW

22-04-2026 10:00 - 11:00 996 MW

22-04-2026 11:00 - 12:00 996 MW

22-04-2026 12:00 - 13:00 996 MW

22-04-2026 13:00 - 14:00 996 MW

22-04-2026 14:00 - 15:00 996 MW

22-04-2026 15:00 - 16:00 996 MW

22-04-2026 16:00 - 17:00 996 MW

22-04-2026 17:00 - 18:00 996 MW

22-04-2026 18:00 - 19:00 996 MW

22-04-2026 19:00 - 20:00 996 MW

22-04-2026 20:00 - 21:00 996 MW

22-04-2026 21:00 - 22:00 996 MW

22-04-2026 22:00 - 23:00 996 MW

22-04-2026 23:00 - 24:00 996 MW

5. Amount of LTTR remaining after curtailment:

22-04-2026 00:00 - 01:00 480 MW

22-04-2026 01:00 - 02:00 480 MW

22-04-2026 02:00 - 03:00 480 MW

22-04-2026 03:00 - 04:00 480 MW

22-04-2026 04:00 - 05:00 480 MW

22-04-2026 05:00 - 06:00 480 MW

22-04-2026 06:00 - 07:00 480 MW

22-04-2026 07:00 - 08:00 480 MW

22-04-2026 08:00 - 09:00 480 MW

22-04-2026 09:00 - 10:00 480 MW

22-04-2026 10:00 - 11:00 480 MW

22-04-2026 11:00 - 12:00 480 MW

22-04-2026 12:00 - 13:00 480 MW

22-04-2026 13:00 - 14:00 480 MW

22-04-2026 14:00 - 15:00 480 MW

22-04-2026 15:00 - 16:00 480 MW

22-04-2026 16:00 - 17:00 480 MW

22-04-2026 17:00 - 18:00 480 MW

22-04-2026 18:00 - 19:00 480 MW

22-04-2026 19:00 - 20:00 480 MW

22-04-2026 20:00 - 21:00 480 MW

22-04-2026 21:00 - 22:00 480 MW

22-04-2026 22:00 - 23:00 480 MW

22-04-2026 23:00 - 24:00 480 MW

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

7. Why alternative measures are not sufficient 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)*:

RNP

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:

22-04-2026 00:00 - 01:00 993 MW

22-04-2026 01:00 - 02:00 993 MW

22-04-2026 02:00 - 03:00 993 MW

22-04-2026 03:00 - 04:00 993 MW

22-04-2026 04:00 - 05:00 993 MW

22-04-2026 05:00 - 06:00 993 MW

22-04-2026 06:00 - 07:00 993 MW

22-04-2026 07:00 - 08:00 993 MW

22-04-2026 08:00 - 09:00 993 MW

22-04-2026 09:00 - 10:00 993 MW

22-04-2026 10:00 - 11:00 993 MW

22-04-2026 11:00 - 12:00 993 MW

22-04-2026 12:00 - 13:00 993 MW

22-04-2026 13:00 - 14:00 993 MW

22-04-2026 14:00 - 15:00 993 MW

22-04-2026 15:00 - 16:00 993 MW

22-04-2026 16:00 - 17:00 993 MW

22-04-2026 17:00 - 18:00 993 MW

22-04-2026 18:00 - 19:00 993 MW

22-04-2026 19:00 - 20:00 993 MW

22-04-2026 20:00 - 21:00 993 MW

22-04-2026 21:00 - 22:00 993 MW

22-04-2026 22:00 - 23:00 993 MW

22-04-2026 23:00 - 24:00 993 MW

5. Amount of LTTR remaining after curtailment:

22-04-2026 00:00 - 01:00 482 MW

22-04-2026 01:00 - 02:00 482 MW

22-04-2026 02:00 - 03:00 482 MW

22-04-2026 03:00 - 04:00 482 MW

22-04-2026 04:00 - 05:00 482 MW

22-04-2026 05:00 - 06:00 482 MW

22-04-2026 06:00 - 07:00 482 MW

22-04-2026 07:00 - 08:00 482 MW

22-04-2026 08:00 - 09:00 482 MW

22-04-2026 09:00 - 10:00 482 MW

22-04-2026 10:00 - 11:00 482 MW

22-04-2026 11:00 - 12:00 482 MW

22-04-2026 12:00 - 13:00 482 MW

22-04-2026 13:00 - 14:00 482 MW

22-04-2026 14:00 - 15:00 482 MW

22-04-2026 15:00 - 16:00 482 MW

22-04-2026 16:00 - 17:00 482 MW

22-04-2026 17:00 - 18:00 482 MW

22-04-2026 18:00 - 19:00 482 MW

22-04-2026 19:00 - 20:00 482 MW

22-04-2026 20:00 - 21:00 482 MW

22-04-2026 21:00 - 22:00 482 MW

22-04-2026 22:00 - 23:00 482 MW

22-04-2026 23:00 - 24:00 482 MW

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

7. Why alternative measures are not sufficient 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)*:

HTSO-TSO

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:

21-04-2026 06:00 - 07:00 800 MW

21-04-2026 07:00 - 08:00 800 MW

21-04-2026 08:00 - 09:00 800 MW

21-04-2026 09:00 - 10:00 800 MW

21-04-2026 10:00 - 11:00 800 MW

21-04-2026 11:00 - 12:00 800 MW

21-04-2026 12:00 - 13:00 800 MW

21-04-2026 13:00 - 14:00 800 MW

21-04-2026 14:00 - 15:00 800 MW

5. Amount of LTTR remaining after curtailment:

21-04-2026 06:00 - 07:00 483 MW

21-04-2026 07:00 - 08:00 483 MW

21-04-2026 08:00 - 09:00 483 MW

21-04-2026 09:00 - 10:00 483 MW

21-04-2026 10:00 - 11:00 483 MW

21-04-2026 11:00 - 12:00 483 MW

21-04-2026 12:00 - 13:00 483 MW

21-04-2026 13:00 - 14:00 483 MW

21-04-2026 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)*:

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:

21-04-2026 00:00 - 01:00 500 MW

21-04-2026 01:00 - 02:00 500 MW

21-04-2026 02:00 - 03:00 500 MW

21-04-2026 03:00 - 04:00 500 MW

21-04-2026 04:00 - 05:00 500 MW

21-04-2026 05:00 - 06:00 500 MW

21-04-2026 06:00 - 07:00 500 MW

21-04-2026 07:00 - 08:00 500 MW

21-04-2026 08:00 - 09:00 500 MW

21-04-2026 09:00 - 10:00 500 MW

21-04-2026 10:00 - 11:00 500 MW

21-04-2026 11:00 - 12:00 500 MW

21-04-2026 12:00 - 13:00 500 MW

21-04-2026 13:00 - 14:00 500 MW

21-04-2026 14:00 - 15:00 500 MW

21-04-2026 15:00 - 16:00 500 MW

21-04-2026 16:00 - 17:00 500 MW

21-04-2026 17:00 - 18:00 500 MW

21-04-2026 18:00 - 19:00 500 MW

21-04-2026 19:00 - 20:00 500 MW

21-04-2026 20:00 - 21:00 500 MW

21-04-2026 21:00 - 22:00 500 MW

21-04-2026 22:00 - 23:00 500 MW

21-04-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

21-04-2026 00:00 - 01:00 241 MW

21-04-2026 01:00 - 02:00 241 MW

21-04-2026 02:00 - 03:00 241 MW

21-04-2026 03:00 - 04:00 241 MW

21-04-2026 04:00 - 05:00 241 MW

21-04-2026 05:00 - 06:00 241 MW

21-04-2026 06:00 - 07:00 241 MW

21-04-2026 07:00 - 08:00 241 MW

21-04-2026 08:00 - 09:00 241 MW

21-04-2026 09:00 - 10:00 241 MW

21-04-2026 10:00 - 11:00 241 MW

21-04-2026 11:00 - 12:00 241 MW

21-04-2026 12:00 - 13:00 241 MW

21-04-2026 13:00 - 14:00 241 MW

21-04-2026 14:00 - 15:00 241 MW

21-04-2026 15:00 - 16:00 241 MW

21-04-2026 16:00 - 17:00 241 MW

21-04-2026 17:00 - 18:00 241 MW

21-04-2026 18:00 - 19:00 241 MW

21-04-2026 19:00 - 20:00 241 MW

21-04-2026 20:00 - 21:00 241 MW

21-04-2026 21:00 - 22:00 241 MW

21-04-2026 22:00 - 23:00 241 MW

21-04-2026 23:00 - 24:00 241 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

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:

21-04-2026 00:00 - 01:00 500 MW

21-04-2026 01:00 - 02:00 500 MW

21-04-2026 02:00 - 03:00 500 MW

21-04-2026 03:00 - 04:00 500 MW

21-04-2026 04:00 - 05:00 500 MW

21-04-2026 05:00 - 06:00 500 MW

21-04-2026 06:00 - 07:00 500 MW

21-04-2026 07:00 - 08:00 500 MW

21-04-2026 08:00 - 09:00 500 MW

21-04-2026 09:00 - 10:00 500 MW

21-04-2026 10:00 - 11:00 500 MW

21-04-2026 11:00 - 12:00 500 MW

21-04-2026 12:00 - 13:00 500 MW

21-04-2026 13:00 - 14:00 500 MW

21-04-2026 14:00 - 15:00 500 MW

21-04-2026 15:00 - 16:00 500 MW

21-04-2026 16:00 - 17:00 500 MW

21-04-2026 17:00 - 18:00 500 MW

21-04-2026 18:00 - 19:00 500 MW

21-04-2026 19:00 - 20:00 500 MW

21-04-2026 20:00 - 21:00 500 MW

21-04-2026 21:00 - 22:00 500 MW

21-04-2026 22:00 - 23:00 500 MW

21-04-2026 23:00 - 24:00 500 MW

5. Amount of LTTR remaining after curtailment:

21-04-2026 00:00 - 01:00 243 MW

21-04-2026 01:00 - 02:00 243 MW

21-04-2026 02:00 - 03:00 243 MW

21-04-2026 03:00 - 04:00 243 MW

21-04-2026 04:00 - 05:00 243 MW

21-04-2026 05:00 - 06:00 243 MW

21-04-2026 06:00 - 07:00 243 MW

21-04-2026 07:00 - 08:00 243 MW

21-04-2026 08:00 - 09:00 243 MW

21-04-2026 09:00 - 10:00 243 MW

21-04-2026 10:00 - 11:00 243 MW

21-04-2026 11:00 - 12:00 243 MW

21-04-2026 12:00 - 13:00 243 MW

21-04-2026 13:00 - 14:00 243 MW

21-04-2026 14:00 - 15:00 243 MW

21-04-2026 15:00 - 16:00 243 MW

21-04-2026 16:00 - 17:00 243 MW

21-04-2026 17:00 - 18:00 243 MW

21-04-2026 18:00 - 19:00 243 MW

21-04-2026 19:00 - 20:00 243 MW

21-04-2026 20:00 - 21:00 243 MW

21-04-2026 21:00 - 22:00 243 MW

21-04-2026 22:00 - 23:00 243 MW

21-04-2026 23:00 - 24:00 243 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

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:

21-04-2026 00:00 - 01:00 150 MW

21-04-2026 01:00 - 02:00 150 MW

21-04-2026 02:00 - 03:00 150 MW

21-04-2026 03:00 - 04:00 150 MW

21-04-2026 04:00 - 05:00 150 MW

21-04-2026 05:00 - 06:00 150 MW

21-04-2026 06:00 - 07:00 150 MW

21-04-2026 07:00 - 08:00 150 MW

21-04-2026 08:00 - 09:00 150 MW

21-04-2026 09:00 - 10:00 150 MW

21-04-2026 10:00 - 11:00 150 MW

21-04-2026 11:00 - 12:00 150 MW

21-04-2026 12:00 - 13:00 150 MW

21-04-2026 13:00 - 14:00 150 MW

21-04-2026 14:00 - 15:00 150 MW

21-04-2026 15:00 - 16:00 150 MW

21-04-2026 16:00 - 17:00 150 MW

21-04-2026 17:00 - 18:00 150 MW

21-04-2026 18:00 - 19:00 150 MW

21-04-2026 19:00 - 20:00 150 MW

21-04-2026 20:00 - 21:00 150 MW

21-04-2026 21:00 - 22:00 150 MW

21-04-2026 22:00 - 23:00 150 MW

21-04-2026 23:00 - 24:00 150 MW

5. Amount of LTTR remaining after curtailment:

21-04-2026 00:00 - 01:00 0 MW

21-04-2026 01:00 - 02:00 0 MW

21-04-2026 02:00 - 03:00 0 MW

21-04-2026 03:00 - 04:00 0 MW

21-04-2026 04:00 - 05:00 0 MW

21-04-2026 05:00 - 06:00 0 MW

21-04-2026 06:00 - 07:00 0 MW

21-04-2026 07:00 - 08:00 0 MW

21-04-2026 08:00 - 09:00 0 MW

21-04-2026 09:00 - 10:00 0 MW

21-04-2026 10:00 - 11:00 0 MW

21-04-2026 11:00 - 12:00 0 MW

21-04-2026 12:00 - 13:00 0 MW

21-04-2026 13:00 - 14:00 0 MW

21-04-2026 14:00 - 15:00 0 MW

21-04-2026 15:00 - 16:00 0 MW

21-04-2026 16:00 - 17:00 0 MW

21-04-2026 17:00 - 18:00 0 MW

21-04-2026 18:00 - 19:00 0 MW

21-04-2026 19:00 - 20:00 0 MW

21-04-2026 20:00 - 21:00 0 MW

21-04-2026 21:00 - 22:00 0 MW

21-04-2026 22:00 - 23:00 0 MW

21-04-2026 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*:

21/04/2026

00:00-01:00 FLEAC - BRIOUX

01:00-02:00 FLEAC - BRIOUX

02:00-03:00 FLEAC - BRIOUX

03:00-04:00 FLEAC - BRIOUX

04:00-05:00 FLEAC - BRIOUX

05:00-06:00 FLEAC - BRIOUX

06:00-07:00 FLEAC - BRIOUX

07:00-08:00 FLEAC - BRIOUX

08:00-09:00 FLEAC - BRIOUX

09:00-10:00 FLEAC - BRIOUX

10:00-11:00 FLEAC - BRIOUX

11:00-12:00 FLEAC - BRIOUX

12:00-13:00 FLEAC - BRIOUX

13:00-14:00 FLEAC - BRIOUX

14:00-15:00 FLEAC - BRIOUX

15:00-16:00 FLEAC - BRIOUX

16:00-17:00 FLEAC - BRIOUX

17:00-18:00 FLEAC - BRIOUX

18:00-19:00 FLEAC - BRIOUX

19:00-20:00 FLEAC - BRIOUX

20:00-21:00 FLEAC - BRIOUX

21:00-22:00 FLEAC - BRIOUX

22:00-23:00 FLEAC - BRIOUX

23:00-24:00 FLEAC - BRIOUX

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

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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.

Get to know us

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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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