SunCoke Energy, Inc., a spinoff of Sunoco and the largest independent producer of high-quality metallurgical coke in the Americas, filed on Wednesday with the SEC to raise up to $100 million in an initial public offering. The Knoxville, TN-based company, which booked $1.3 billion in sales last year, plans to list on the NYSE under the symbol SXC. Credit Suisse is the lead underwriter on the deal, for which pricing terms and timing were not disclosed.