The Duckhorn Portfolio, Inc. engages in the selection, winemaking techniques, and barrel-aging program. Its brands include Duckhorn Vineyards, Decoy, Kosta Browne, Goldeneye, Paraduxx, Calera, Migration, Canvasback, Greenwing and Postmark. The company was founded by Daniel J. Duckhorn and Margaret Duckhorn in 1976 and is headquartered in St. Helena, CA.