O'Shaughnessy
O'Shaughnessy Estate Winery is a family-owned Napa Valley producer established in 1996, crafting terroir-driven Cabernet Sauvignon from three distinct vineyard estates, including high-elevation sites on Howell Mountain and Mount Veeder with volcanic and sedimentary soils. The winery maintains a balanced approach between traditional techniques and modern precision under longtime winemaker Sean Capiaux, fermenting fruit in small lots using both stainless steel and concrete vessels before aging in French oak to express the distinctive character of their mountain vineyards.
Oddero, Poderi Colla
Poderi Colla is a family-owned Piedmontese estate with 25 hectares across three distinct terroirs in Barolo, Barbaresco, and Alba, focusing primarily on Nebbiolo grown on limestone-rich marl soils at varying elevations. Their winemaking balances tradition with precision through sustainable farming, extended macerations, and aging in large Slavonian oak casks rather than small barriques, with separate vinification of each vineyard parcel to preserve authentic terroir expression.
Olivier Bernstein, Domaine
Olivier Bernstein is a boutique négociant house in Beaune producing around 2,500 cases annually from seven Grand Cru and three Premier Cru sites in the Côte de Nuits, working exclusively with old-vine Pinot Noir from prestigious terroirs like Mazis-Chambertin and Chambertin Clos-de-Bèze. The domaine's distinctive approach includes an in-house cooperage program tailoring oak treatment to each cuvée, along with wooden vat fermentation and extensive aging of 16-18 months before bottling without fining or filtration.
Olivier Leflaive, Maison
Olivier Leflaive is known for his white Burgundy wines, particularly from Puligny-Montrachet and Chassagne-Montrachet, that offer a benchmark for quality in the region.
Once Future
Once & Future is Joel Peterson's small-scale, personally-driven winery in Los Carneros, California, focusing on single-vineyard Zinfandel and heritage varieties sourced from historic vineyards throughout the state, including century-old plantings at Bedrock, Oakley Road, and Teldeschi. Peterson employs traditional techniques including native yeast fermentations in open-top vessels, hand punch-downs, and French oak aging tailored to each vineyard, producing fewer than 500 cases per designation to maintain meticulous attention to detail.
Opus One
Opus One is a Legendary winery located in the Napa Valley, California. Founded as a joint venture between Baron Philippe de Rothschild of Château Mouton Rothschild and Robert Mondavi, Opus One is known for producing high-quality red wine, meticulously crafted to blend Napa Valley’s terroir with the refinement of the Bordeaux winemaking tradition.
Orin Swift
Orin Swift Cellars, founded by Dave Phinney in California, is known for its innovative blends like The Prisoner, delivering bold, artistic wines with a distinct profile.
Orma
Orma, located in Tuscany's Bolgheri region, produces Super Tuscan wines that are rich and modern, showcasing the blending of international grape varieties with Italian terroir.
Ormes de Pez, Chateau
Château Ormes de Pez is a 40-hectare Saint-Estèphe estate in Bordeaux's northern Médoc, owned by the Cazes family since 1940, producing structured Cabernet Sauvignon-dominant wines from gravelly, clay-limestone soils that benefit from the Gironde estuary's moderating influence. The estate maintains traditional Bordeaux winemaking principles while implementing modern techniques like temperature-controlled fermentation and parcel-by-parcel vinification, aging their wines 12-15 months in French oak to express the appellation's characteristic firm structure and earthy mineral notes.
Ornellaia, Tenuta dell'
Tenuta dell'Ornellaia is a Legendary winery located in the Bolgheri DOC appellation in Tuscany, Italy. Founded in 1981, Ornellaia is known for producing high-quality Bordeaux-style red wines, including its flagship wine, Ornellaia.