Here is a listing of "Major" Supermarket Chains listed by region.

Shaw's, Stop N'Shop, Roche Bros, Whole Foods,
Hannaford's, Price Chopper, King's, Big Y, Shop Rite, Wegman's, Stew Leonard's

Fresh Market

Super Fresh, Whole Foods, Giant, Zingerman's
Chicago Area: Artisan Cellar, Binny's, Foodstuffs,
Fox & Obel, Marcey Street Market, Treasure Island

Wild Oats, King Sooper's, Albertson's

Whole Foods, Heb Central Market,

Whole Foods, Gelson's, Bristol Farms, Mollie Stone's

Southern Region:
Brattleboro Food(Brattleboro) Fantastic Gifts (Bennington) Cheese House(Arlington)River Bend Market(Townshend)
Winhall Market(Bondville) VT Country Store(Weston)
Weston Village Store(Weston)
Central Vermont:
Middlebury Co-op(Middlebury) Gillingham's (Woodstock)
Black River Produce(Proctorsville) Fool on The Hill(Queeche)
Northern Vermont:
Hunger Mountain Co-op(Montpelier) Cheese Outlet(Burlington)
Cheese Traders(Burlington)
Tafstville Country Store(Taftsville)
Frog City Cheese (Plymouth)