LONDON — March 2, 2012 — AZ has received notification that The Carlyle Group and Vestar Capital Partners (the original “Major Shareholders”) have today each sold their residual shareholding in the Company to institutional investors, through a combined placing of 44,097,548 shares conducted by Deutsche Bank (the “Placing”).

The Placing completes the entire sell down by the Major Shareholders of their respective holdings in AZ following the Company’s successful IPO in November 2010.

A full notification by the Company, pursuant to the Luxembourg transparency requirements, will be provided upon receipt of full disclosure from each of the Major Shareholders.

For further information, please contact:

Michael Arnaouti, Company Secretary
+44 (0) 20 8622 3814

FTI Consulting
Edward Bridges / Nick Hasell
+44 (0) 20 7269 7147

About AZ

AZ is a leading global producer and supplier of high quality, high-purity specialty chemical materials, operating in the high growth electronics market. Its materials are used in integrated circuits (“ICs”) and devices, flat panel displays (“FPDs”), light-emitting diodes (“LEDs”) and photolithographic printing. AZ is a critical partner to the leading global electronic players because our chemical technology allows them to enhance existing processes and enables them to innovate new products. This is critically important in the “digital world” where there is increasing global demand and a drive towards smaller, faster, more powerful and less expensive technology. AZ operates in ten countries, namely China, India, South Korea, Taiwan, Hong Kong, Japan, Singapore, the USA, France and Germany. It also has corporate and administrative offices in Luxembourg, the UK and Hong Kong, and employs over 1,000 people globally.

This information is provided by RNS, the company news service from the London Stock Exchange.