According to the Seafood Watch program, wild-caught shrimp from Oregon and British Columbia are "best" to buy. Avoid imported farmed or trawl-caught species.
Arrange beans in a steamer basket over boiling water. Cover and steam 3 minutes. Plunge beans into ice water to stop cooking process. Drain and set aside.
Peel and devein shrimp; coarsely chop into pieces.
Melt 2 tablespoons butter in a large nonstick skillet over medium-high heat just until butter starts to brown. Add shrimp; sauté 1 minute or until shrimp turn pink. Add beans, mushrooms, and corn; sauté 2 minutes, stirring occasionally. Stir in wine, and cook 1 minute. Whisk in remaining 2 tablespoons butter, stirring just until butter melts. Stir in parsley, salt, and pepper.