Conversion of multiple voting shares into ordinary shares and notice of the total amount of voting rights

Milan, 29 September 2026 – Industrie De Nora S.p.A. (“IDN” or the “Company”) hereby announces that, following the settlement of the accelerated bookbuilding transaction involving 10,084,258 multiple voting shares of the Company, representing approximately 5% of its share capital, held by Asset Company 10 S.r.l. (“AC10”), a wholly owned subsidiary of Snam S.p.A. (“Snam”), those multiple voting shares have been converted into ordinary shares of the Company, resulting in a change in the total amount of voting rights.

On 21 September 2026, Snam announced, on behalf of AC10, the launch of an accelerated bookbuilding transaction involving IDN shares. The transaction, the final results of which were announced to the market on 22 September 2026, involved a total of 10,084,258 shares, representing approximately 5% of the Company’s share capital, and settled on 24 September 2026.

As a result of the completion of the transfer and in accordance with Article 5.6 of the Company’s By-laws, the 10,084,258 multiple voting shares involved in the transaction were automatically converted, at a 1:1 ratio, into ordinary shares of the Company, without the need for any expression of intent by their holder and with no change in the amount of share capital.

On 29 September 2026, the Company’s Board of Directors acknowledged that the conversion had taken place pursuant to Article 5.6 of the Company’s By-laws.

Following the conversion, the Company’s share capital remains unchanged at EUR 18,268,203.90, as does the total number of shares, at 201,685,174. The number of ordinary shares increased from 51,203,979 to 61,288,237, while the number of multiple voting shares decreased from 150,481,195 to 140,396,937. Consequently, the total amount of voting rights decreased from 502,647,564 to 482,479,048.

Accordingly, pursuant to Article 85-bis, paragraph 4-bis, of the regulation adopted by Consob Resolution No. 11971 of May 14, 1999, as subsequently amended and supplemented (the “Issuers’ Regulation”), the total amount of voting rights and the number of shares comprising the share capital are set out below.

^{(*) The multiple voting shares are held by Federico De Nora, Federico De Nora S.p.A., Norfin S.p.A. and Asset Company 10 S.r.l. Pursuant to Article 5.6 of the By-laws, each multiple voting share carries three voting rights at ordinary and extraordinary Shareholders’ Meetings. Multiple voting shares are not admitted to trading on Euronext Milan and are not included in the free float or stock market capitalization.
(**) Following the settlement of the accelerated bookbuilding transaction and the resulting conversion, the 140,396,937 multiple voting shares are held as follows: 6,619,560 by Federico De Nora; 88,847,684 by Federico De Nora S.p.A.; 11,474,617 by Norfin S.p.A.; and 33,455,076 by Asset Company 10 S.r.l.}