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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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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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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 IF1-FR-GB and IF1-GB-FR border for delivery period 11-05-2025

Published: 08/05/2025 | 18:16 by JAO
Capacity Curtailment on the IF1-FR-GB and IF1-GB-FR border for delivery period 10-05-2025

Published: 08/05/2025 | 18:16 by JAO
2025 Auction Calendar update

Published: 08/05/2025 | 09:48 by JAO
Split of the FR<>BE Annual 2026 auction

Published: 08/05/2025 | 09:14 by JAO
Publication of IDCC (b) data for Business Day 08/05/2025

Published: 08/05/2025 | 08:24 by JAO
Daily Curtailment Notification for Market Period 09/05/2025 - (IT-FR, GR-IT, IT-GR, SI-IT)

Published: 08/05/2025 | 07:38 by JAO
Publication of IDCC (b) data for Business Day 08/05/2025

Published: 07/05/2025 | 23:21 by JAO

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1. TSO(s)*:

NGIC and RTE

2. Identification of affected Long Term Transmission Rights:

IF1-FR-GB

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

IF1-FR-GB

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

11-05-2025 00:00 - 01:00 1950 MW

11-05-2025 01:00 - 02:00 1950 MW

11-05-2025 02:00 - 03:00 1950 MW

11-05-2025 03:00 - 04:00 1950 MW

11-05-2025 04:00 - 05:00 1950 MW

11-05-2025 05:00 - 06:00 1950 MW

11-05-2025 06:00 - 07:00 1950 MW

11-05-2025 07:00 - 08:00 1950 MW

11-05-2025 08:00 - 09:00 1950 MW

11-05-2025 09:00 - 10:00 1950 MW

11-05-2025 10:00 - 11:00 1950 MW

11-05-2025 11:00 - 12:00 1950 MW

11-05-2025 12:00 - 13:00 1950 MW

11-05-2025 13:00 - 14:00 1950 MW

11-05-2025 14:00 - 15:00 1950 MW

11-05-2025 15:00 - 16:00 1950 MW

11-05-2025 16:00 - 17:00 1950 MW

11-05-2025 17:00 - 18:00 1950 MW

11-05-2025 18:00 - 19:00 1950 MW

11-05-2025 19:00 - 20:00 1950 MW

11-05-2025 20:00 - 21:00 1950 MW

11-05-2025 21:00 - 22:00 1950 MW

11-05-2025 22:00 - 23:00 1950 MW

11-05-2025 23:00 - 24:00 1950 MW

5. Amount of LTTR remaining after curtailment:

11-05-2025 00:00 - 01:00 1470 MW

11-05-2025 01:00 - 02:00 1470 MW

11-05-2025 02:00 - 03:00 1470 MW

11-05-2025 03:00 - 04:00 1470 MW

11-05-2025 04:00 - 05:00 1470 MW

11-05-2025 05:00 - 06:00 1470 MW

11-05-2025 06:00 - 07:00 1470 MW

11-05-2025 07:00 - 08:00 1470 MW

11-05-2025 08:00 - 09:00 1470 MW

11-05-2025 09:00 - 10:00 1470 MW

11-05-2025 10:00 - 11:00 1470 MW

11-05-2025 11:00 - 12:00 1470 MW

11-05-2025 12:00 - 13:00 1470 MW

11-05-2025 13:00 - 14:00 1470 MW

11-05-2025 14:00 - 15:00 1470 MW

11-05-2025 15:00 - 16:00 1470 MW

11-05-2025 16:00 - 17:00 1470 MW

11-05-2025 17:00 - 18:00 1470 MW

11-05-2025 18:00 - 19:00 1470 MW

11-05-2025 19:00 - 20:00 1470 MW

11-05-2025 20:00 - 21:00 1470 MW

11-05-2025 21:00 - 22:00 1470 MW

11-05-2025 22:00 - 23:00 1470 MW

11-05-2025 23:00 - 24:00 1470 MW

IF1-GB-FR

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

11-05-2025 00:00 - 01:00 1949 MW

11-05-2025 01:00 - 02:00 1949 MW

11-05-2025 02:00 - 03:00 1949 MW

11-05-2025 03:00 - 04:00 1949 MW

11-05-2025 04:00 - 05:00 1949 MW

11-05-2025 05:00 - 06:00 1949 MW

11-05-2025 06:00 - 07:00 1949 MW

11-05-2025 07:00 - 08:00 1949 MW

11-05-2025 08:00 - 09:00 1949 MW

11-05-2025 09:00 - 10:00 1949 MW

11-05-2025 10:00 - 11:00 1949 MW

11-05-2025 11:00 - 12:00 1949 MW

11-05-2025 12:00 - 13:00 1949 MW

11-05-2025 13:00 - 14:00 1949 MW

11-05-2025 14:00 - 15:00 1949 MW

11-05-2025 15:00 - 16:00 1949 MW

11-05-2025 16:00 - 17:00 1949 MW

11-05-2025 17:00 - 18:00 1949 MW

11-05-2025 18:00 - 19:00 1949 MW

11-05-2025 19:00 - 20:00 1949 MW

11-05-2025 20:00 - 21:00 1949 MW

11-05-2025 21:00 - 22:00 1949 MW

11-05-2025 22:00 - 23:00 1949 MW

11-05-2025 23:00 - 24:00 1949 MW

5. Amount of LTTR remaining after curtailment:

11-05-2025 00:00 - 01:00 1445 MW

11-05-2025 01:00 - 02:00 1445 MW

11-05-2025 02:00 - 03:00 1445 MW

11-05-2025 03:00 - 04:00 1445 MW

11-05-2025 04:00 - 05:00 1445 MW

11-05-2025 05:00 - 06:00 1445 MW

11-05-2025 06:00 - 07:00 1445 MW

11-05-2025 07:00 - 08:00 1445 MW

11-05-2025 08:00 - 09:00 1445 MW

11-05-2025 09:00 - 10:00 1445 MW

11-05-2025 10:00 - 11:00 1445 MW

11-05-2025 11:00 - 12:00 1445 MW

11-05-2025 12:00 - 13:00 1445 MW

11-05-2025 13:00 - 14:00 1445 MW

11-05-2025 14:00 - 15:00 1445 MW

11-05-2025 15:00 - 16:00 1445 MW

11-05-2025 16:00 - 17:00 1445 MW

11-05-2025 17:00 - 18:00 1445 MW

11-05-2025 18:00 - 19:00 1445 MW

11-05-2025 19:00 - 20:00 1445 MW

11-05-2025 20:00 - 21:00 1445 MW

11-05-2025 21:00 - 22:00 1445 MW

11-05-2025 22:00 - 23:00 1445 MW

11-05-2025 23:00 - 24:00 1445 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

1. TSO(s)*:

NGIC and RTE

2. Identification of affected Long Term Transmission Rights:

IF1-FR-GB

IF1-GB-FR

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

IF1-FR-GB

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

10-05-2025 00:00 - 01:00 1950 MW

10-05-2025 01:00 - 02:00 1950 MW

10-05-2025 02:00 - 03:00 1950 MW

10-05-2025 03:00 - 04:00 1950 MW

10-05-2025 04:00 - 05:00 1950 MW

10-05-2025 05:00 - 06:00 1950 MW

10-05-2025 06:00 - 07:00 1950 MW

10-05-2025 07:00 - 08:00 1950 MW

10-05-2025 08:00 - 09:00 1950 MW

10-05-2025 09:00 - 10:00 1950 MW

10-05-2025 10:00 - 11:00 1950 MW

10-05-2025 11:00 - 12:00 1950 MW

10-05-2025 12:00 - 13:00 1950 MW

10-05-2025 13:00 - 14:00 1950 MW

10-05-2025 14:00 - 15:00 1950 MW

10-05-2025 15:00 - 16:00 1950 MW

10-05-2025 16:00 - 17:00 1950 MW

10-05-2025 17:00 - 18:00 1950 MW

10-05-2025 18:00 - 19:00 1950 MW

10-05-2025 19:00 - 20:00 1950 MW

10-05-2025 20:00 - 21:00 1950 MW

10-05-2025 21:00 - 22:00 1950 MW

10-05-2025 22:00 - 23:00 1950 MW

10-05-2025 23:00 - 24:00 1950 MW

5. Amount of LTTR remaining after curtailment:

10-05-2025 00:00 - 01:00 1470 MW

10-05-2025 01:00 - 02:00 1470 MW

10-05-2025 02:00 - 03:00 1470 MW

10-05-2025 03:00 - 04:00 1470 MW

10-05-2025 04:00 - 05:00 1470 MW

10-05-2025 05:00 - 06:00 1470 MW

10-05-2025 06:00 - 07:00 1470 MW

10-05-2025 07:00 - 08:00 1470 MW

10-05-2025 08:00 - 09:00 1470 MW

10-05-2025 09:00 - 10:00 1470 MW

10-05-2025 10:00 - 11:00 1470 MW

10-05-2025 11:00 - 12:00 1470 MW

10-05-2025 12:00 - 13:00 1470 MW

10-05-2025 13:00 - 14:00 1470 MW

10-05-2025 14:00 - 15:00 1470 MW

10-05-2025 15:00 - 16:00 1470 MW

10-05-2025 16:00 - 17:00 1470 MW

10-05-2025 17:00 - 18:00 1470 MW

10-05-2025 18:00 - 19:00 1470 MW

10-05-2025 19:00 - 20:00 1470 MW

10-05-2025 20:00 - 21:00 1470 MW

10-05-2025 21:00 - 22:00 1470 MW

10-05-2025 22:00 - 23:00 1470 MW

10-05-2025 23:00 - 24:00 1470 MW

IF1-GB-FR

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

10-05-2025 00:00 - 01:00 1949 MW

10-05-2025 01:00 - 02:00 1949 MW

10-05-2025 02:00 - 03:00 1949 MW

10-05-2025 03:00 - 04:00 1949 MW

10-05-2025 04:00 - 05:00 1949 MW

10-05-2025 05:00 - 06:00 1949 MW

10-05-2025 06:00 - 07:00 1949 MW

10-05-2025 07:00 - 08:00 1949 MW

10-05-2025 08:00 - 09:00 1949 MW

10-05-2025 09:00 - 10:00 1949 MW

10-05-2025 10:00 - 11:00 1949 MW

10-05-2025 11:00 - 12:00 1949 MW

10-05-2025 12:00 - 13:00 1949 MW

10-05-2025 13:00 - 14:00 1949 MW

10-05-2025 14:00 - 15:00 1949 MW

10-05-2025 15:00 - 16:00 1949 MW

10-05-2025 16:00 - 17:00 1949 MW

10-05-2025 17:00 - 18:00 1949 MW

10-05-2025 18:00 - 19:00 1949 MW

10-05-2025 19:00 - 20:00 1949 MW

10-05-2025 20:00 - 21:00 1949 MW

10-05-2025 21:00 - 22:00 1949 MW

10-05-2025 22:00 - 23:00 1949 MW

10-05-2025 23:00 - 24:00 1949 MW

5. Amount of LTTR remaining after curtailment:

10-05-2025 00:00 - 01:00 1445 MW

10-05-2025 01:00 - 02:00 1445 MW

10-05-2025 02:00 - 03:00 1445 MW

10-05-2025 03:00 - 04:00 1445 MW

10-05-2025 04:00 - 05:00 1445 MW

10-05-2025 05:00 - 06:00 1445 MW

10-05-2025 06:00 - 07:00 1445 MW

10-05-2025 07:00 - 08:00 1445 MW

10-05-2025 08:00 - 09:00 1445 MW

10-05-2025 09:00 - 10:00 1445 MW

10-05-2025 10:00 - 11:00 1445 MW

10-05-2025 11:00 - 12:00 1445 MW

10-05-2025 12:00 - 13:00 1445 MW

10-05-2025 13:00 - 14:00 1445 MW

10-05-2025 14:00 - 15:00 1445 MW

10-05-2025 15:00 - 16:00 1445 MW

10-05-2025 16:00 - 17:00 1445 MW

10-05-2025 17:00 - 18:00 1445 MW

10-05-2025 18:00 - 19:00 1445 MW

10-05-2025 19:00 - 20:00 1445 MW

10-05-2025 20:00 - 21:00 1445 MW

10-05-2025 21:00 - 22:00 1445 MW

10-05-2025 22:00 - 23:00 1445 MW

10-05-2025 23:00 - 24:00 1445 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

Dear Market Participants,

We would like to inform you that as per TSOs request, the 2025 Auction Calendar has been updated on the corridor FR-BE.

For more details please refer to the Auction Calendar on our webpage http://www.jao.eu/auctions#/calendar/table to find its latest version.

Best regards,

JAO Operations Team

Dear Market Participants,

Following a successful auction split in 2024, RTE and Elia are pleased to announce that the France-Belgium yearly capacity for the delivery year 2026 will be split and offered into two separate auctions. The first one will be held in June 2025 and the second one end of Q4 2025.

As for the June auction, you will find the details below (timings in CET):

Bidding Month	Interconnector	Product	Horizon	Volume (MW)	Auction Start	Time (of the opening)	Auction End	Time (of the End)	Dispute period
June 2025	BE->FR	Y BASE 1	2026	125	10/06/2024	13:50	17/06/2024	13:50	2-2 days
June 2025	FR->BE	Y BASE 1	2026	700	10/06/2024	13:50	17/06/2024	13:50	2-2 days

The details of the second auction (end of Q4) will be communicated at a later stage.

Kind Regards,

JAO Operations

Dear Market Participants,

We would like to inform you that Validation Reduction ATC data for the delivery date of 08/05/2025, for the Core ID CCR IDCC (b) will not be published as the data is not available on CCCT.

Thank you for your understanding.

Kind regards,

JAO Operations

Capacity Curtailment on the IT-FR border for delivery period 09-05-2025

1. TSO(s)*:
TERNA, RTE, APG. SWG, ELES

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

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

4. Affected volume in MW / hour for each concerned period:
09-05-2025 12:00 - 13:00 1869 MW
09-05-2025 13:00 - 14:00 1869 MW
09-05-2025 14:00 - 15:00 1869 MW

5. Amount of LTTR remaining after curtailment:
09-05-2025 12:00 - 13:00 1817 MW
09-05-2025 13:00 - 14:00 1817 MW
09-05-2025 14:00 - 15:00 1817 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 GR-IT border for delivery period 09-05-2025

1. TSO(s)*:
TERNA, ADMIE

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:
09-05-2025 00:00 - 01:00 50 MW
09-05-2025 01:00 - 02:00 50 MW
09-05-2025 02:00 - 03:00 50 MW
09-05-2025 03:00 - 04:00 50 MW
09-05-2025 04:00 - 05:00 50 MW
09-05-2025 05:00 - 06:00 50 MW
09-05-2025 06:00 - 07:00 50 MW
09-05-2025 07:00 - 08:00 50 MW
09-05-2025 08:00 - 09:00 50 MW
09-05-2025 09:00 - 10:00 50 MW
09-05-2025 10:00 - 11:00 50 MW
09-05-2025 11:00 - 12:00 50 MW
09-05-2025 12:00 - 13:00 50 MW
09-05-2025 13:00 - 14:00 50 MW
09-05-2025 14:00 - 15:00 50 MW
09-05-2025 15:00 - 16:00 50 MW
09-05-2025 16:00 - 17:00 50 MW
09-05-2025 17:00 - 18:00 50 MW
09-05-2025 18:00 - 19:00 50 MW
09-05-2025 19:00 - 20:00 50 MW
09-05-2025 20:00 - 21:00 50 MW
09-05-2025 21:00 - 22:00 50 MW
09-05-2025 22:00 - 23:00 50 MW
09-05-2025 23:00 - 24:00 50 MW

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

Not Applicable

Capacity Curtailment on the IT-GR border for delivery period 09-05-2025

1. TSO(s)*:
TERNA, ADMIE

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

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

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 SI-IT border for delivery period 09-05-2025

1. TSO(s)*:

TERNA, RTE, APG. SWG, 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:
09-05-2025 07:00 - 08:00 230 MW
09-05-2025 08:00 - 09:00 230 MW

5. Amount of LTTR remaining after curtailment:
09-05-2025 07:00 - 08:00 203 MW
09-05-2025 08:00 - 09:00 203 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

Dear Market Participants,

We would like to inform you that missing data for the delivery date of 08/05/2025, for the Core ID CCR IDCC (b) will be published with a delay. Thank you for your understanding.

Best regards,

JAO Operations Team

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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

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