Further to its communication of 30 December 2025, GME informs market participants that it will organise a session of blank tests on the new Market for the Management of Voluntary Solidarity Measures (MVS).

The blank test sessions will be held 8 and 9 January 2026, via the test platform, available at

https://provegas.ipex.it/SOLGasWebSite/

in the following hours:

1. opening of the sitting for submission of bids/offers at 10:30;
2. closing of the sitting for submission of bids/offers at 13:30;
3. results at 14:00.

The blank tests will be open to parties registered on the live MGAS platform as of 22 December 2025.

Other parties wishing to participate in the blank tests may request the registration of their digital certificates at provegas.ipex.it/gaswebsite/register.aspx.

Additional information about the test sessions will be made available on the homepage of the test platform.

For queries about the tests and the operation of the MVS platform, please contact GME at proveGas@mercatoelettrico.org.

The data entered during the tests will not be used for operational purposes on the Platform.

GME informs market participants that, as of today, with the publication on its website, the amended text of the Natural-Gas Market Rules (hereafter MGAS Rules) will enter into force. GME amended the MGAS Rules to introduce provisions governing the operation of the new Market for the Management of Voluntary Solidarity Measures (hereafter MVS), in compliance with Legislative Decree 14/2021 (Disposizioni per l’adeguamento della normativa nazionale alle disposizioni del regolamento UE 2017/2038 - Provisions for aligning the national legislation with Regulation (EU) 2017/1938), and with Regulation (EU) 2017/1938, as supplemented by Regulation (EU) 2024/1789 (hereafter Regulation).

Also the new Technical Rule no. 23 MGAS, containing the implementing and procedural provisions for the MVS, will enter into force as of today, with its publication on GME’s website.

As is known, the Regulation introduces, inter alia, the so-called “solidarity mechanism”. This mechanism serves as a last-resort option for Member States to address extreme gas emergency situations that cannot be resolved by other measures included in their National Emergency Plans. Specifically, under this mechanism, a Member State experiencing an exceptional gas emergency may request solidarity from one or more Member States in order to procure the gas resources that it requires to manage the emergency. The mechanism provides that the Member State receiving the solidary request must satisfy such request by resorting, on a priority basis, to market-based measures (voluntary measures), or to non-market-based measures if market-based measures prove insufficient to ensure the necessary supplies to the Member State declaring the state of emergency.

In this regard, as indicated above, GME introduced the MVS into the MGAS. The MVS is a trading platform dedicated to voluntary solidarity measures, on which GME will not play the role of central counterparty.

The MVS will be open to:

1. buyers: the requesting Member States or their designated parties, acting on behalf of the requesting Member States and notified by SRG to GME; such buyers must priorly acquire the status of MGAS participants;
2. sellers: the holders of redelivery points qualifying as interruptible-supply consumers and notified by SRG to GME; such sellers, too, must priorly acquire the status of MGAS participants.

In the MVS:

1. the solidarity-requesting Market Participants will directly select supply offers of their interest from the MVS order book (using the catching trading mechanism);
2. the concluded transactions, valued at the price quoted in the selected supply offer, will be directly registered at the PSV by the Market Participants involved, which will also settle the related payment.

GME will activate the sessions of the MVS at the request of SRG – if the above conditions arise – and notify MGAS Participants thereof. Therefore, all the parties wishing to participate in the sessions of the MVS must acquire the status of MGAS participants beforehand, in accordance with the MGAS Rules, by submitting to GME the documents available on its website at:

https://www.mercatoelettrico.org/Home/MarketAccess/Gas/M-GAS/HowParticipate/Forms

GME also informs Market Participants that a document entitled Schema di processo per l’attuazione delle misure di mercato previste dal Regolamento UE 2017/1938, art. 13 (Process diagram for implementing the market-based measures set forth in art. 13 of Regulation (EU) 2017/1938) is available on the website of SRG. The document describes the procedures for organising, activating, and performing the market-based measures that can be activated when a Member State requests solidarity under the Regulation.

Finally, for parties wishing to take part in the MVS and test its features, GME will organise blank test sessions, whose procedures and calendar will be provided in a subsequent communication.

NATURAL-GAS MARKET

1. MGAS Rules
2. Technical Rule no. 23 MGAS

NEMOs are key in building a well-functioning EU-wide Internal Electricity Market. We strongly believe that markets and transparency should be at the centre of the electrification, decarbonisation, and competitiveness challenges in Europe.

In different fora the NEMOs have been asked by several stakeholders to publish jointly, or at least to coordinate the publication of information which is relevant to the market and sometimes not easily available.

Following this request, GME, HENEX, OKTE, OMIE and OTE (hereinafter, the TP NEMOs Initiators) as fully regulated monopolistic NEMOs clearly understanding the stakeholders’ transparency requirements, are pleased to announce the launch of their joint initiative: the NEMO Transparency Platform.

The TP NEMOs initiators believe that the results from the single day-ahead coupling and the single intraday coupling must be made available in a common and easily accessible format in the NEMO Transparency Platform.

The NEMO Transparency Platform is an ambitious, unprecedented project that shows our commitment to transparency and to bring the most relevant market data in our respective bidding zones to a centralised platform.

The NEMO Transparency Platform can be reached at www.nemotransparencyplatform.eu and currently publishes selected results from the single day-ahead coupling and the single intraday coupling for the Czech Republic, Greece, Italy, Portugal, Slovakia and Spain.

We look forward to onboarding other NEMOs soon and getting the feedback from the stakeholders to create shared value.

Press Release

Further to the communication issued by Terna on 5 December 2025, GME informs market participants that the go-live of the extension of the XBID trading period - by up to half an hour before the start of the delivery period, pursuant to Regulation (EU) 2019/943, as amended by Regulation (EU) 2024/1747 - is confirmed as of the flow date of 14 January 2026.

As a result of this change, the deadline for XBID trading and nominations will be postponed by thirty minutes compared with the current timetable - XBID trading from h-1 to h-30’ and nominations from h-57’ to h-27’ - with the consequent postponement of the generation of the corresponding Unit Schedule (US) files and of the closing of MBh sessions.

Further to its previous communication on …,GME informs market participants that, as of today, with the publication on GME’s website, the updated versions of Technical Rules nos. 02 and 06 P-GO will enter into force.

The amendments made to the Technical Rules are aimed at introducing, among the P-GO trading systems, new types of GOs in the gas sector. These new types have been defined by GSE in compliance with article 15 of Ministerial Decree no. 294 of 7 August 2024 (“Ministerial Decree on Sustainability") in replacement of the types of GOs in force so far.

The updated versions of Technical Rules nos. 02 and 06 P-GO (i.e. Technical Rule no. 02 Rev. 12 P-GO and Technical Rule no. 06 Rev. 04 P-GO) fully replace the previous versions published on GME’s website.

Starting from 15 October 2025, GME will make available a new channel for accessing its market data (published in the “Results” section of its website www.mercatoelettrico.org): an API (Application Programming Interface) Service.

The new channel will initially operate alongside the current FTPS channel, which will remain active during for a further transitional period only for already registered users.

The final decommissioning of the FTPS channel will be announced well in advance to allow interested users, already registered with the FTPS, to migrate to the new system in a gradual and smooth way.

To request authorisation for data access via the API Service, the applicant must submit the documents listed at the following link, in accordance with the procedures and within the timeframes indicated in the API User Manual.

All interested users are invited to consult the API Service access procedure and related technical documents, available at this link.

For queries about the authorisation procedure, please contact SupportoAPI@mercatoelettrico.org.

To receive technical-IT support, please contact Sistemi@mercatoelettrico.org.

Further to the press release issued by the Market Coupling Steering Committee (MCSC) on 12 September 2025, GME announces that, as of today, with delivery date on 1 October 2025, products with a 15-minute Market Time Unit (MTU) will be available for trading in the Day-Ahead Market (MGP) and within the Single Day-Ahead Coupling (SDAC).

Starting today, concurrently with the go-live of 15-minute MTU products, GME will also make available in the MGP products with a 30-minute market time interval, in addition to the already available products with a 60-minute market time interval.

With a view to enabling the trading of the above-mentioned products, the new versions of the following Technical Rules, referred to in the Integrated Text of the Electricity Market Rules and adequately updated, will enter into force as of today, with their publication on GME’s website:

Technical Rule no. 03 rev. 13 MPE – Timing for the sessions of the MGP, MI, MSD and for the Nomination PlatformTechnical Rule no. 05 rev. 04 MPE – Products tradable in the MGP and MI, number of multiple bids/offers in the MGP, MI-A, and MSD, and maximum number of block bids/offers in the MGP and MI-ATechnical Rule no. 10 rev. 05 MPE – Checks of technical adequacy of bids/offers with respect to marginsTechnical Rule no. 14 rev. 02 MPE – Defining the results of the MGP and MI

Following some reports received by telephone and email to Gestore dei Mercati Energetici S.p.A. ("GME"), it seems that these telephone calls are made by a supposed "GME Office" and/or so-called GME operators, regarding proposals to change the electricity and/or gas supplier due to increases in cost of energy, not properly specified, or problems in the current supply, which were followed, in some cases, by emails with similar content.

It should be remembered that GME is completely unrelated to the event mentioned above. We would like to clearly state that we do not provide, in any way, commercial services such as those described above. Furthermore, we do not use communication methods with our clients such as those outlined above.

When in doubt, we always suggest to make sure of the above by contacting your current electricity and/or gas supplier according to the contact methods made available by the same. In any case, we suggest to avoid any possible follow up about proposals such as those highlighted above, in order not to face any unpleasant inconveniences.