Diageo shares jumped as much as 11% in London on 6 August, their sharpest intraday move since 2020, as chief executive Sir Dave Lewis unveiled the fullest picture yet of how he plans to fix the world's largest premium spirits group. For a company that has cut its dividend, downgraded forecasts, and cycled through three CEOs in three years, the market reaction signalled genuine relief that a coherent plan had finally landed.
Who is Dave Lewis
Lewis, 60, took over as Diageo CEO in January 2026, arriving with a reputation forged at Tesco, where he served as chief executive from 2014 to 2020, leading a cost-cutting turnaround following the retailer's 2014 accounting scandal. Before Tesco, he spent three decades at Unilever, and most recently chaired Haleon, the consumer health group, from 2022 to 2025. He is Diageo's third CEO in under three years, following the departures of Ivan Menezes's successor Debra Crew.
The Scale of the Turnaround
The numbers explain why a plan was so urgently needed. Diageo's reported revenue fell 3% to $19.64 billion in the year to 30 June 2026, with organic net sales down 2% and reported operating profit dropping 27.2% to $3.16 billion — a decline driven in part by $900 million in restructuring charges and $1.5 billion in impairments. Growth in Europe, Latin America, and Africa was offset by weakness in North America and Asia-Pacific, with Chinese white spirits sales hit hardest by government policy changes.
Lewis's response is a $3.75 billion spending programme built around cutting roughly $1 billion in costs over three years, on top of an existing $650 million savings programme that is largely complete. A new, simplified global operating model is expected to be in place across 90% of Diageo's markets by September, intended to bring overhead down from over 14% to 10.5% of net sales within two years. He has been explicit that this is not a portfolio reshuffle: "We're not buying, we're not selling," he has said. "We have what we need to turn the business around."
Guinness: The Biggest Bet
The standout commitment is Guinness. Lewis has pledged $1 billion to double the brand's global production capacity over the next three to five years, calling Guinness one of Diageo's two "strategic battlegrounds," alongside ready-to-drink beverages. Guinness now accounts for roughly 12% of group sales, and Lewis has described its outlook as "very bright," pointing to strong demand from younger drinkers in both established and new markets.
The Ireland Angle
That investment has a direct Irish dimension. In May 2026, Diageo confirmed a further €400 million for its Littleconnell brewery in Newbridge, Co. Kildare — on top of an earlier investment of almost €300 million — with the new phase focused on brewing Guinness and Guinness 0.0 for export markets. The facility, opened with Taoiseach Micheál Martin in attendance, is separate from the brand's home at St James's Gate in Dublin, which continues to anchor domestic and tourism-facing production. Consumer-facing innovation is also headed for Ireland: the new "Guinness Nitrosurge Tap," a home dispense device, is confirmed to launch in Ireland, the UK, and the US next year.
What Lewis is Cutting to Pay For It
The Guinness bet is being funded by reducing costs elsewhere. Diageo recorded $514 million in severance costs during FY26 as part of a broader management delayering, streamlining regional structures to give managing directors more direct decision-making power in their markets. Senior departures have followed, including long-serving North America marketing and innovation chief Ed Pilkington. Lewis has also moved to strengthen the company's balance sheet through disposals completed under the prior review — including its stake in East African Breweries and the Royal Challengers Bangalore cricket franchise — together worth more than $4 billion, with no further major acquisitions or divestments currently planned.
The RTD Gap
Beyond Guinness, Lewis has flagged ready-to-drink beverages as Diageo's other priority, and one where the company has lost significant ground — its RTD market share has fallen from around 25% to roughly 10% in recent years. He has been unusually candid about where the current range falls short, saying of the whiskey RTD lineup: "We have not put our best foot forward in whiskey RTDs. I'm disappointed with the flavours."
What This Could Mean for Ireland
The Kildare investment and continued St James's Gate production make Ireland one of the clearest beneficiaries of Lewis's Guinness-first strategy, at a moment when Diageo is cutting substantially elsewhere in the business. For Irish suppliers, hospitality brands, and tourism operators connected to Guinness, sustained capital commitment to Irish brewing capacity — rather than a pullback — is the more consequential signal buried inside a results day dominated by headline job losses.
The Bottom Line
Lewis's plan is a bet that Diageo can cut its way to a leaner cost base while investing aggressively behind its two strongest growth brands, Guinness and RTDs, without touching the rest of the portfolio through deals. The market's initial 11% share price jump suggests investors are willing to give him room to execute it — but with three CEOs in three years behind Diageo, the credibility of the plan will now rest on delivery, not the announcement.