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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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Important notice: Temporary Email Exchange Degradation

Published: 12/08/2026 | 16:10 by JAO
Invitation to Open Call for Market Participants 08/09/2026

Published: 12/08/2026 | 11:26 by JAO
Capacity Curtailment on the SI-IT border for delivery period 13-08-2026

Published: 12/08/2026 | 08:25 by JAO
Capacity Curtailment on the HU-AT border for delivery period 13-08-2026

Published: 12/08/2026 | 08:22 by JAO
Capacity Curtailment on the AT-CZ border for delivery period 13-08-2026

Published: 12/08/2026 | 08:16 by JAO
Capacity Curtailment on the AT-DE border for delivery period 13-08-2026

Published: 12/08/2026 | 08:13 by JAO
Capacity Curtailment on the IT-CH border for delivery period 13-08-2026

Published: 12/08/2026 | 07:25 by JAO

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Please be advised that we are currently experiencing a temporary degradation in our email services.

Our IT team is actively investigating the issue and working to restore normal service as quickly as possible.

We will provide further updates as soon as additional information becomes available.

Thank you for your understanding and patience.

JAO Operations

Dear Market Participants,

We are excited to invite you to our next Open Call that will be held on 8th of September 2026, at 14:00 CET via Microsoft Teams.

This meeting offers a valuable opportunity for us to collaborate, share updates, and discuss any topics of interest.

Please download the attached invitation file and add it to your calendar as a reminder for the meeting.

Should you have any questions or require clarification on any JAO services, kindly submit them either here or by scanning the QR code attached or going to this link https://emea.dcv.ms/o4G0ybqkKp by the 1st of September EOD.

Proposed Agenda:

Auction calendar
Project Update
Long Term Flow Based Allocation
Orion - The Allocation Tool
JAO Support Hub

You are also welcome to forward it to any colleagues who may benefit from it.

Kind regards,

JAO Customer Service and Relationship Management

1. TSO(s)*:

TERNA

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:

13-08-2026 00:00 - 01:00 59 MW

13-08-2026 01:00 - 02:00 59 MW

13-08-2026 02:00 - 03:00 59 MW

13-08-2026 03:00 - 04:00 59 MW

13-08-2026 04:00 - 05:00 59 MW

13-08-2026 05:00 - 06:00 59 MW

13-08-2026 06:00 - 07:00 59 MW

13-08-2026 07:00 - 08:00 59 MW

13-08-2026 08:00 - 09:00 59 MW

13-08-2026 09:00 - 10:00 59 MW

13-08-2026 10:00 - 11:00 59 MW

13-08-2026 11:00 - 12:00 59 MW

13-08-2026 12:00 - 13:00 59 MW

13-08-2026 13:00 - 14:00 59 MW

13-08-2026 14:00 - 15:00 59 MW

13-08-2026 15:00 - 16:00 59 MW

13-08-2026 16:00 - 17:00 59 MW

13-08-2026 17:00 - 18:00 59 MW

13-08-2026 18:00 - 19:00 59 MW

13-08-2026 19:00 - 20:00 59 MW

13-08-2026 20:00 - 21:00 59 MW

13-08-2026 21:00 - 22:00 59 MW

13-08-2026 22:00 - 23:00 59 MW

13-08-2026 23:00 - 24:00 59 MW

5. Amount of LTTR remaining after curtailment:

13-08-2026 00:00 - 01:00 59 MW

13-08-2026 01:00 - 02:00 59 MW

13-08-2026 02:00 - 03:00 59 MW

13-08-2026 03:00 - 04:00 59 MW

13-08-2026 04:00 - 05:00 59 MW

13-08-2026 05:00 - 06:00 59 MW

13-08-2026 06:00 - 07:00 59 MW

13-08-2026 07:00 - 08:00 59 MW

13-08-2026 08:00 - 09:00 59 MW

13-08-2026 09:00 - 10:00 59 MW

13-08-2026 10:00 - 11:00 59 MW

13-08-2026 11:00 - 12:00 59 MW

13-08-2026 12:00 - 13:00 59 MW

13-08-2026 13:00 - 14:00 59 MW

13-08-2026 14:00 - 15:00 59 MW

13-08-2026 15:00 - 16:00 59 MW

13-08-2026 16:00 - 17:00 59 MW

13-08-2026 17:00 - 18:00 59 MW

13-08-2026 18:00 - 19:00 59 MW

13-08-2026 19:00 - 20:00 59 MW

13-08-2026 20:00 - 21:00 59 MW

13-08-2026 21:00 - 22:00 59 MW

13-08-2026 22:00 - 23:00 59 MW

13-08-2026 23:00 - 24:00 59 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.

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

HU-AT

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-08-2026 09:00 - 10:00 260 MW

13-08-2026 10:00 - 11:00 260 MW

13-08-2026 11:00 - 12:00 260 MW

13-08-2026 12:00 - 13:00 260 MW

13-08-2026 13:00 - 14:00 260 MW

5. Amount of LTTR remaining after curtailment:

13-08-2026 09:00 - 10:00 225 MW

13-08-2026 10:00 - 11:00 217 MW

13-08-2026 11:00 - 12:00 234 MW

13-08-2026 12:00 - 13:00 234 MW

13-08-2026 13:00 - 14:00 234 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.

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-CZ

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-08-2026 09:00 - 10:00 350 MW

13-08-2026 10:00 - 11:00 350 MW

13-08-2026 11:00 - 12:00 350 MW

13-08-2026 12:00 - 13:00 350 MW

13-08-2026 13:00 - 14:00 350 MW

5. Amount of LTTR remaining after curtailment:

13-08-2026 09:00 - 10:00 116 MW

13-08-2026 10:00 - 11:00 140 MW

13-08-2026 11:00 - 12:00 119 MW

13-08-2026 12:00 - 13:00 134 MW

13-08-2026 13:00 - 14:00 146 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.

1. TSO(s)*:

APG

2. Identification of affected Long Term Transmission Rights:

AT-DE

3. Triggering event:

Curtailment to ensure operation remains within Operational Security Limits

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

13-08-2026 09:00 - 10:00 3819 MW

13-08-2026 10:00 - 11:00 3819 MW

13-08-2026 11:00 - 12:00 3819 MW

13-08-2026 12:00 - 13:00 3819 MW

13-08-2026 13:00 - 14:00 3819 MW

5. Amount of LTTR remaining after curtailment:

13-08-2026 09:00 - 10:00 1332 MW

13-08-2026 10:00 - 11:00 1545 MW

13-08-2026 11:00 - 12:00 2443 MW

13-08-2026 12:00 - 13:00 3193 MW

13-08-2026 13:00 - 14:00 3493 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.

1. TSO(s)*:

TERNA

2. Identification of affected Long Term Transmission Rights:

IT-CH

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:

13-08-2026 19:00 - 20:00 720 MW

13-08-2026 20:00 - 21:00 720 MW

13-08-2026 21:00 - 22:00 720 MW

5. Amount of LTTR remaining after curtailment:

13-08-2026 19:00 - 20:00 630 MW

13-08-2026 20:00 - 21:00 630 MW

13-08-2026 21:00 - 22:00 533 MW

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