Milan, 22 December 2017 – Under the buyback program of treasury shares referred to Art. 5 of the Commission Delegated Regulation (EU) of 8 March 2016 no. 596/2014 (the “MAR”), announced to the market on 22 September 2017 and launched on 25 September 2017 for no. 15,000,000 ordinary shares (the “Program”) servicing the equity-linked bond, Maire Tecnimont S.p.A. (the “Company” or “Maire Tecnimont”) announces – according to the provision and for the purpose of Article 2 paragraph 3  of the Commission Delegated Regulation (EU) 2016/1052 of 8 March 2016 (the “1052 EU Regulation”) – to have acquired on the Telematic Stock Exchange Market (MTA) organized and managed by Borsa Italiana S.p.A., in the period from 14 December 2017 through 22 December 2017 inclusive, total no. 784,000of treasury shares (corresponding to 0.26% of the total number of ordinary shares), at a weighted average price of Euro 4.065 for a total counter-value of Euro 3,187,015.24.

On the basis of information provided by Banca IMI S.p.A., the authorized intermediary in charge of carrying out the buyback mentioned in the present press release, here below is a summary of the daily operations, in aggregate form:

Transaction date

Number of purchased shares

Average price (euro)

Countervalue (euro)

14 December 2017

90,000

3.879940

349,194.60

15 December 2017

100,000

4.004200

400,420.00

18 December 2017

144,000

3.931710

566,166.24

19 December 2017

80,000

4.057250

324,580,00

20 December 2017

120,000

4.118820

494,258.40

21 December 2017

150,000

4.189680

628,452.00

22 December 2017

100,000

4.239440

423,944.00

In accordance with the provisions of Article 2 paragraph 3 of the UE Regulation 1052, attached to this press release, information of the daily buying-in operations carried out in the above-mentioned period is indicated in detail.

This information is also published on the Company’s website, www.mairetecnimont.com (Section “Investors” – “Press Release” – “Press Release Buy Back”) for a five-year period.

On 22 December 2017, the treasury shares held by the Company amount to no. 9,659,548.

Maire Tecnimont SpA

Maire Tecnimont S.p.A. is a company listed with the Milan stock exchange. It heads an industrial group (the Maire Tecnimont Group) that leads the international Engineering & Construction (E&C), Technology & Licensing and Energy Business Development & Ventures markets, with specific competences in plants, particularly in the hydrocarbons segment (Oil & Gas, Petrochemicals and Fertilisers), as well as in Power Generation and Infrastructures. The Maire Tecnimont Group operates in approximately 40 different countries, numbering around 50 operative companies and a workforce of more than 5,400 employees, along with approximately 3,000 additional Electrical & Instrumentation professionals. For more information: www.mairetecnimont.com.

Institutional Relations and Communication

Carlo Nicolais                                                      public.affairs@mairetecnimont.it

Media Relations

Investor Relations

Riccardo Guglielmetti

Tel +39 02 6313-7823

investor-relations@mairetecnimont.it

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Tel +39 02 89011300

mairetecnimont@imagebuilding.it