Constellium, a PE-backed aluminum product manufacturer, saw its IPO raise about $333 million. It now trades on the NYSE and Euronext Paris indices under the symbol CSTM. The total offering of 22.2 million shares at $15 per share was priced below its expected $17 to $19 range. Shareholder Apollo Global Management offered about 6.3 million shares in the offering, paring its stake down from 54.0% to 36.4%. Based in Paris, Constellium's aluminum products are utilized by the aerospace and transportation, packaging and automotive industries.