Opus One says Michael Silacci will retire after the 2026 harvest and a formal search for the next winemaker will begin in early 2027. Napa County records show the Oakville winery already has a larger production and visitor envelope than it did a decade ago.

Opus One has put a calendar on its cellar succession. In a July notice↗ (external source, opens in a new tab), the Oakville winery says Michael Silacci will retire after the 2026 harvest and that a formal search for the next winemaker will begin in early 2027.

The winery’s official site↗ (external source, opens in a new tab) lists the address as 7900 Saint Helena Highway, on the Highway 29 corridor. That is the useful frame for the change: not a restaurant-style chef shuffle, not a sale, and not a new tasting room announcement. It is a leadership transition inside one of Napa Valley’s most scrutinized wine businesses.

The tenure is long enough to matter. Opus says Silacci joined in 2001 and took sole charge of winemaking in 2003. By the time he leaves, the job will have been associated with one person for more than two decades. The next hire will be asked to make the house feel steady before they are asked to make it feel new.

The public record gives the business side of the room. A Napa County environmental filing from 2016↗ (external source, opens in a new tab) says a permit modification allowed annual production to increase by 140,000 gallons and weekly visitation to rise to 1,450 people. Those are the fundamentals an operator clocks first: output, guest count and the pressure those numbers put on the cellar and hospitality teams.

That is why the search is more than a name change. Opus One is not opening, closing or changing ownership. It is changing winemaking leadership while operating with a larger permitted production and visitor model. In Napa, prestige buys attention. It does not run the place. The next hire has to do that, vintage by vintage, while the Highway 29 room keeps taking reservations.