MIBGAS, the Organised Gas Market Operator, accounted in March a traded
volume higher than 8% of national natural gas demand, breaking the last record achieved in
October 2017 (6.25%). This is the ever highest volume since the Market was launched in
December 2015. Today, MIBGAS accounts for 68 Market Agents provided the recent (in March)
incorporations of Statoil and Enstroga.

The number of trades carried out in March 2018 reached 6,443, more than three times the number
registered twelve months ago (1,875). Additionally, traded volume in March 2018 (2,574 GWh)
shows a considerable increase compared to March 2017 (849 GWh), as well.

Likewise, the percentage of the demand traded at MIBGAS during the first quarter of this year
(5.9%) slightly duplicates the value registered in the same period of last year (2.90%). With regard
to the number of trades, the amount accounted for the first three months of the year (13,553) is
also considerably higher than the number registered the same period of last year (5,393). Last but
not least, the traded volume did increase as well to reach 5,926 GWh, compared to 2,800 GWh of
March 2017.

NEW CALL FOR THE VOLUNTARY MARKET MAKER SERVICE
Additionally, MIBGAS has just published, on its website, the tendering terms and the calendar of
the call for the voluntary market maker service to be carried out in the second half of 2018. By the
end of June, this service is being provided by the company ENGIE España.

The service of voluntary market maker entered into operation in January 2017 aiming at enhancing
the liquidity of the Market by achieving the continuous presence of bid and ask natural gas offers
on the MIBGAS trading platform. This role does exist on the vast majority of the European organised
markets.