1 Rome, July 2006

2 STMicroelectronics a global semiconductor company 12 % North America 30 % Europe 4 % Japan 22 % Asia Pacific 7 % Emerging Markets* Q Sales : US$ 2.36 billion 2005 Sales : US$ 8.88 billion Approximately 50,000 employees 16 main production sites 16 advanced R&D centers 39 design and application centers 78 direct sales offices in 36 countries *India, Russia, Africa, Latin America, Middle East ** China, Taiwan, Hong Kong Sales by region % of Q sales 25 % Greater China**

3 Shareholding structure * * At December 31, 2005 ** New York Stock Exchange, Euronext, Paris and Borsa Italiana, Milano *** ST Holding II BV is a company whose shares are owned indirectly by Areva, and directly by Finmeccanica and Cassa Depositi e Prestiti which have signed between them a STH Shareholders Agreement. (1) Based on Corporate Governance rights between FT1CI/Areva and CDP/Finmeccanica pursuant to STH Shareholders Agreement AREVA 100% Public** 72.4% STMicroelectronics N.V. (ST) CDP / Finmeccanica 50% (1) ST Holding II B.V.*** 27.6% FT1CI 50 % ST Holding N.V. 100% Cassa Depositi e Prestiti (CDP) 60% Finmeccanica 40%

Sales Sales2004/2005 Fcst Change Rank Rank COMPANY HEADQUARTERS($M) ($M, Fcst) % Change in Ranking 1 1 Intel U.S % none 2 2 Samsung South Korea % none 3 3 Texas Instruments U.S % none 4 7 Toshiba Japan % + 3 positions 5 6 STMicroelectronics Europe % + 1 position 6 4 Infineon Europe % - 2 positions 7 5 Renesas Japan % - 2 positions 8 8 TSMC * Taiwan % none 9 12 Sony Japan % + 3 positions Philips Europe % none * foundry 2005 TOP 20 WORLDWIDE SEMICONDUCTOR SUPPLIER RANKING ($M, Forecast) Source: Company Reports, IC Insights

5 Computer Peripherals Digital Consumer Automotive Communications Industrial & Smartcard #1 in Print Head ICs #4 in Hard Disc Drive #3 in Automotive #1 in Car entertainment #1 in Comm. dedicated products #3 in Wireless #1 in TV Set Top Box #6 in Consumer #1 in Power conversion Market #2 in SmartCard Prominent Positioning in Targeted Market Segments -

6 innovation Investing in R&D expenditure US$ millions CAPEX US$ millions CAPEX US$ millions

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8 AGRATE CATANIA CASTELLETTO Excellence center of R&D Multi-functions center of Manufacturing, R&D, Marketing,… ITALY ARZANO Naples Multi-functions center of Manufacturing, R&D, Marketing,… HW and SW design

9 ST Italy Sites - an historical and significant presence Catania Area acting Employees4564 of which degree/high school 95% of which employed in R&D 27% acting Employees5414 of which degree/high school 86% of which employed in R&D 39% Milan Area including Naples ST Italy Sites acting Employees9978 of which degree/high school 89% of which employed in R&D 34%

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11 ST ITALY 2005 at a glance Revenues (M eur.) 1674 Net equity (M eur.) 1698 Personnel (ACTING) % ST Degree / high school89 % Other11 % Investments (M eur.) % ST R&D expenses (M eur.) % ST Patents filed (n.) % ST Production ( 8 eq. Kwaf ) % ST

12 STMicroelectronics in DIGITAL CONVERGENCE Pioneer and leader in Digital Consumer with 60% market share in MPEG2, MPEG4 and advance coding for standard and high definition. First supplier of single chip MPEG4/H264 HD decoder. Chipset supplier for Satellite, Cable, IPTV and DTT Set Top Box Manufacturers. System solution for Mobile TV DVB-H. Close cooperation with all Italian broadcasters and telecom operators. Member of HD Forum. Competence Center for Digital Consumer in Milano area