As an expert sommelier and brewer, I can shed some light on the winery behind Kirkland Signature wines. Kirkland Signature wines are a private label brand exclusively available at Costco stores. While the exact identity of the wineries producing Kirkland wines may not be readily apparent, there is evidence to suggest that Kirkland Signature wines are sourced from established wine makers and importers through cut-rate contracts.
Similarly, the TTB registry also reveals that Kirkland Signature's Italian wines are linked to Ethica Wines. Ethica Wines is an importer specializing in Italian wines, further suggesting that they may be the source for Kirkland's Italian wine offerings.
It is important to note that private label brands like Kirkland Signature often contract with established producers and importers to create their wines. These contracts allow them to offer high-quality wines at more affordable prices compared to well-known, branded wines. This practice is common in the wine industry, and it enables retailers like Costco to provide their customers with a diverse selection of wines under their own label.
In my personal experience, I have come across several private label wines that have exceeded expectations in terms of quality and value. These wines often surprise consumers who may underestimate the quality of private label offerings. Therefore, it is worth noting that the lack of a well-known winery name on the label does not necessarily indicate a subpar wine. The sourcing and production behind Kirkland Signature wines likely involve careful selection and collaboration with experienced wine producers and importers.