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.

Gestore dei Servizi Energetici – GSE S.p.A. has informed GME that the Certigy platform, managed by GSE, will be unavailable from 18:00 on 8 December 2025 to 10:00 on 9 December 2025. This suspension is necessary to implement, within the platform, the new types of GOs in the gas sector, defined by GSE in compliance with article 15 of Ministerial Decree no. 294 of 7 August 2024 (“Ministerial Decree on Sustainability”). These new types of GOs will replace those applicable so far, as shown in the following table:

As a consequence, throughout the duration of the unavailability of GSE’s Certigy platform, GME’s P-GO platform will be temporarily suspended and will become available again at 10:01 on 9 December 2025.

The P-GO will be also updated to incorporate the provisions referred to in the above-mentioned Decree.

Hence, interested market participants may again submit requests for registration of bilateral transactions on the PB-GO from 10:01 on 9 December 2025.

Please note that, with the introduction of the new types of GOs in the GAS sector, the requests for registration of bilateral transactions - present on the PB-GO system, still awaiting processing upon suspension of the P-GO, and covering the previous GOs in the gas sector - will be automatically updated (as indicated by GSE) by replacing the previous type of GAS GO with the corresponding new type of GAS GO with the “CNGandLNG” label.

With regard to the MGO, the new configuration of the platform will be available for market participants upon the session planned for 11 December 2025.

Upon the reinstatement of the P-GO platform, GME will communicate the updated versions of the Technical Rules incorporating the new types of GOs in the GAS sector.

For queries, please contact GME at go@mercatoelettrico.org.

Further to its communications of 15 July and 1 October 2025 , GME informs market participants that it will organise the second stage of blank tests on the trading of the new weekend products consisting of more than two days, as well as of the consequent daily and Working Days Next Week (WK/DY NW) products listed on such occasion.

GME points out that the scenario to be tested will take place for the first time in the MGAS during the Christmas 2025 period. In such period, a weekend product consisting of 4 days (namely WE-2025-52 corresponding to 25, 26, 27, and 28 December 2025), the WK/DY NW product consisting of 3 days (WD-2025-52 corresponding to 22, 23, and 24 December 2025), and the daily products G+4 and G+5 (corresponding to 28 and 29 December, respectively) will be tradable.

Blank test sessions will be held only on the working days from 1 to 7 December on the test platform, available at https://provegas.ipex.it/MGasWebSite/ in the following hours:

1. opening of the sitting for submission of bids/offers at 09:30;
2. closing of the sitting for submission of bids/offers at 16:30.

In order to reproduce the scenario planned for the WE-2025-52 product on the working days from 1 to 7 December, trading will be simulated according to the following timetable:

1. trading of the WK/DY NW product consisting of 3 gas-days only (Monday 22, Tuesday 23, and Wednesday 24 December 2025);
2. trading of the WE product consisting of 4 gas-days (Thursday 25, Friday 26, Saturday 27, and Sunday 28 December 2025);
3. trading of the daily products G+4 (Sunday 28 December 2025) and G+5 (Monday 29 December 2025).

It is worth noting that, on the days from 15 to 24 December 2025, the timetable and the ordinary product naming conventions should take into account the following changes:

1. in the week from 15 to 19 December, the WD-2025-52 product, consisting of 3 gas-days (Monday 22, Tuesday 23, and Wednesday 24 December 2025), will be tradable;
2. on Tuesday 23 and Wednesday 24 December, the WE-2025-52 product, consisting of 4 gas-days (Thursday 25, Friday 26, Saturday 27, and Sunday 28 December 2025), will be tradable;
3. on 24 December, the products G+4 (corresponding to Sunday 28 December) and G+5 (corresponding to Monday 29 December), identified on Trayport as Sunday and DA, respectively, will be tradable.

For details about trading and product naming conventions, please refer to the MGAS reference timetable.

The other weekends being traded in the MGAS prior to the Christmas 2025 weekend will ordinarily consist only of the gas-days corresponding to Saturday and Sunday.

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

For queries about the tests and the operation of the MGAS platform, please write to GME at proveGas@mercatoelettrico.org.

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

Following the notice date 19 January 2018, it is hereby announced that the "time window" relating to the collection of data on the monthly storage and transit capacity of mineral oils referred to the first quarter of 2026, is scheduled between 1^st and 22^nd December 2025 from Monday to Friday, from 09:30 am to 5:30 pm.Specifically, in the aforementioned period, the persons subject to the notification obligation referred to in Article 2, paragraph 2.1, of the Ministerial Decree of 5 July 2017, no. 17433, are required to send to GME - through the Mineral-oil storage and transit capacity data reporting platform (PDC-oil) – the data on the monthly storage and transit capacity of mineral oils referred to the period January-April 2026.Please note that, as provided for by the Ministry of Economic Development with Circular Letter no. 0014614 dated 05 June 2018, the notification of data relating to LPG depots for automotive purposes is excluded from the monthly data collection of the monthly storage and transit capacity of mineral oils.

The parties subject to the notification obligation which are not yet registered on the PDC-oil must access the platform and carry out the registration procedure described in the “PDC-oil participant’s guide”.For further information, please contact the following e-mail address logistica@mercatoelettrico.org or contact the telephone numbers 06 8012 4337/4500.Circular Letter no. 1612 of 19 January 2018Annex A Monthly Collection of Available Storage CapacityAnnex B Monthly Collection of Available Transit Capacity

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.