DiaSorin : Start up treasury shares buy-back plan

Press Release

Saluggia, May 3rd, 2018

START UP OF THE TREASURY SHARES BUY-BACK PLAN OF DIASORIN S.P.A.

DiaSorin S.p.A. announces the

April 23rd, 2018, for the purposes set forth in Article 5 of the EU Regulation no. 596/2014, and namely for the implementation of the share incentive plan for key executives of DiaSorin S.p.A.

named "", approved by the same Shareholders' Meeting.

The purchases will be carried out upon terms and conditions set out in the above mentioned Shareholders' resolution, consistently with the conditions for trading set forth in Article 3 of Delegated Regulation (EU) no. 2016/1052, for a maximum amount of no. 675.000 Company's common shares, equal to 1.206% of the Company's share capital, corresponding to an estimated maximum amount* of Euros 61,258,156.88,

.

In the event of purchases,

For any further details please refer to the Explanatory Report of the Board of Directors on the motion approved by the Shareholders' Meeting on April 23rd, 2018, available

.

At the present date the Company holds no. 641.357 treasury shares.

The Chief Executive Officer

Mr. Carlo Rosa

* Amount calculated on the maximum price per share in accordance with the Shareholders' resolution, based on the DiaSorin ordinary shares reference close registered on May 2nd, 2018.