Constellium Provides Supplemental Information Regarding the Agreement to Acquire Wise Metals Intermediate Holdings, LLC

Amsterdam, October 6, 2014 –, Constellium N.V. (NYSE and NYSE Euronext: CSTM) announces that in response to certain topics raised in the question and answer portion of its webcasted conference call last Friday, it has posted supplemental information to its website.

The revised presentation, including the supplemental information highlighted on page three, is available at:

https://constellium.com/financial-results-presentations

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