AdvanSix is a U.S.-based integrated chemicals company spun off from Honeywell in 2016. The company operates five manufacturing facilities, primarily along the U.S. East Coast, and produces a portfolio of chemical products from a single vertically integrated production chain starting with cumene. Cumene is processed into phenol and acetone, most of the phenol is then converted into caprolactam (the building block for Nylon 6), and caprolactam production generates ammonium sulfate as a co-product. AdvanSix's four product lines are plant nutrients (primarily ammonium sulfate fertilizer, ~37% of sales), chemical intermediates (primarily acetone, ~25%), Nylon 6 resin (~20%), and caprolactam sold to external customers (~18%). AdvanSix earns money by capturing the spread between raw material costs (cumene, natural gas, sulfur) and finished product prices. About half the portfolio uses formula-based pricing that passes through raw material costs, so profitability in those segments is most sensitive to market spreads. Plant nutrients are priced at market rates, so ammonium sulfate margins depend on fertilizer prices relative to input costs. A key structural feature is the co-product ratio: for every pound of caprolactam produced, AdvanSix generates roughly four pounds of ammonium sulfate, making fertilizer revenue a built-in byproduct of running the nylon chain. The business is fixed-cost-intensive, so plant utilization is a primary driver of profitability. AdvanSix's primary growth investment is its SUSTAIN program, which is expanding granular ammonium sulfate capacity, as granular commands a price premium over standard grade.