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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

2026 Auction Calendar update

by JAO

We would like to inform you that as per TSOs request, the 2026 Auction Calendar has been updated on the corridor AT-HU and IF2-FR<>GB

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

Urgent Market Update: 2nd round created for AT-HU-M-BASE-------260201-02 for Market Period 01//02/2026-01/03/2026 opening on 19/01/2026 at 14:00

by JAO

Please note that the 2nd round of the long term auction for the corridor AT-HU with auction ID  AT-HU-M-BASE-------260201-02 is opening on 19/01/2026 at 14:00 and will close on 21/01/2026 at 14:00

Please note that the Default Bids will not be taken into consideration, thank your understanding.

Kind regards,

JAO Operations

Urgent Market Update: Cancellation of AT-HU-M-BASE-------260201-01 for Market Period 01//02/2026-01/03/2026

by JAO

As per TSO request, the AT-HU Auction for market period 01//02/2026-01/03/2026 with the auction ID AT-HU-M-BASE-------260201-01 has been cancelled.

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

Change of method to determine the GLSK of the CZ bidding zone

by JAO

Dear Market Participants,

In line with article 24(5) of the Core DA CCM and article 21(5) of the Core ID CCM ČEPS would like to inform you about an upcoming change of the method to determine the GLSK of the CZ bidding zone.

ČEPS aims to align its GLSK strategy based on findings of Core GLSK study. The Core GLSK study found that where the GSK values of each node contained in a TSO's IGM shall be defined in proportion to the absolute values of power injections and withdrawals in the IGM will provide increased accuracy in the calculation of capacities.

The new method will be applied for the DA as well as the ID timeframe. Due to ongoing IT developments the go-live date is not yet set and will be communicated in a market message as soon as possible. The change is expected to be deployed in Q2 2026.

Sincerely,

ČEPS

Capacity Curtailment on the D2-D1 border for delivery period 20-01-2026

by JAO

1. TSO(s)*:

ENERGINET

2. Identification of affected Long Term Transmission Rights:

D2-D1

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

20-01-2026 07:00 - 08:00 300 MW

20-01-2026 08:00 - 09:00 300 MW

20-01-2026 09:00 - 10:00 300 MW

20-01-2026 10:00 - 11:00 300 MW

20-01-2026 11:00 - 12:00 300 MW

20-01-2026 12:00 - 13:00 300 MW

20-01-2026 13:00 - 14:00 300 MW

20-01-2026 14:00 - 15:00 300 MW

20-01-2026 15:00 - 16:00 300 MW

20-01-2026 16:00 - 17:00 300 MW

5. Amount of LTTR remaining after curtailment:

20-01-2026 07:00 - 08:00 197 MW

20-01-2026 08:00 - 09:00 197 MW

20-01-2026 09:00 - 10:00 197 MW

20-01-2026 10:00 - 11:00 197 MW

20-01-2026 11:00 - 12:00 197 MW

20-01-2026 12:00 - 13:00 197 MW

20-01-2026 13:00 - 14:00 197 MW

20-01-2026 14:00 - 15:00 197 MW

20-01-2026 15:00 - 16:00 197 MW

20-01-2026 16:00 - 17:00 197 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

Capacity Curtailment on the D1-D2 border for delivery period 20-01-2026

by JAO

1. TSO(s)*:

ENERGINET

2. Identification of affected Long Term Transmission Rights:

D1-D2

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

20-01-2026 07:00 - 08:00 300 MW

20-01-2026 08:00 - 09:00 300 MW

20-01-2026 09:00 - 10:00 300 MW

20-01-2026 10:00 - 11:00 300 MW

20-01-2026 11:00 - 12:00 300 MW

20-01-2026 12:00 - 13:00 300 MW

20-01-2026 13:00 - 14:00 300 MW

20-01-2026 14:00 - 15:00 300 MW

20-01-2026 15:00 - 16:00 300 MW

20-01-2026 16:00 - 17:00 300 MW

5. Amount of LTTR remaining after curtailment:

20-01-2026 07:00 - 08:00 54 MW

20-01-2026 08:00 - 09:00 54 MW

20-01-2026 09:00 - 10:00 54 MW

20-01-2026 10:00 - 11:00 54 MW

20-01-2026 11:00 - 12:00 54 MW

20-01-2026 12:00 - 13:00 54 MW

20-01-2026 13:00 - 14:00 54 MW

20-01-2026 14:00 - 15:00 54 MW

20-01-2026 15:00 - 16:00 54 MW

20-01-2026 16:00 - 17:00 54 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

Capacity Curtailment on the SI-IT border for delivery period 16-01-2026

by JAO

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:

16-01-2026 23:00 - 24:00 310 MW

5. Amount of LTTR remaining after curtailment:

16-01-2026 23:00 - 24:00 284 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 in the calculation.

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

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. 

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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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