Rachel Waters is a process chemist by training. She flags this almost as a disclaimer – "normally you don't put a process chemist in front of a guest experience.” So we’re about to get the unvarnished version. A welcome treat for an industry that is unshakeably traditional – The Macallan being one of the most buttoned-up operators in said industry.
She's been at The Macallan for 26 years. Her title is now COO. The brief on her shoulders, as she puts it, is "everything from the barley field to the bar." And the bar is a very long way from where the story actually begins.
The Macallan distillery in Speyside is unlike anything I’ve ever seen in the world of scotch whisky. 485 acres of native woodland, warehouses, solar panels, and a building that looks like a grassy hillside from the entry road and something closer to a Bond villain's lair from the inside. The iconic River Spey snakes its boundary. It’s here, deep underground, where Waters walks us through what The Macallan has been cooking, and at some point she drops an analogy that I can't shake from my mind, even months later.
"Savile Row versus Marks & Spencer," she says. Bespoke versus off the rack.
Waters is referring to The Macallan’s casks. As of 2026, the distillery is essentially making them to order. It’s done that by attempting a rather brazen vertical integration strategy that’s so obvious you wonder why no one else has attempted it before. This is a very recent – and very major – supply chain development. By default, everyone else is now technically buying second-hand with no absolute control over a cask’s provenance. The Macallan has switched to chess while everyone else is still playing checkers.
It’s a bold claim. And understanding why they’re on this path means starting this conversation not in Scotland, but 1,800 kilometres south, in the baking heat of Andalusia.
The Cradle
If the distillery in Speyside is where The Macallan that touches your lips is born, Jerez de la Frontera is its cradle. This corner of southern Spain, known as the sherry triangle, is where the whisky's character is effectively hard-coded years before it arrives in Scotland.
Here's the thing the layperson might gloss over about Scotch: the cask does the heavy lifting. The Macallan claims up to 80 per cent of the final flavour comes from the wood and the sherry it carries in its first life. European oak and sherry grapes from Jerez combine to produce the natural dark golden colour that is most revered by whisky distillers. No caramel colouring, no shortcuts.
But European oak can take up to a century to mature. These trees are generational assets, and the casks they produce are some of the most sought-after commodities in the spirits industry for their purity.
So sherry casks are in high demand and perpetually short supply. Distilleries are scrambling to get their hands on them, and most settle for whatever they can source, or worse, buy ex-bourbon barrels from the American whiskey industry, double-dunk newmake spirit in them like a twice-used teabag, and call it a day.
The Macallan decided some time ago that it wasn't going to compete for scraps. It was going to own the kitchen.
The Power Move
In 2024, The Macallan acquired a 50 per cent stake in the Tevasa Forrestal Group, who source wood from Northern Spain and craft them into casks in Jerez. The year prior, The Macallan also took 50 per cent of Valdespino, the winery where the casks then go to rest full of sherry. Both deals left the remaining half with the founding families – though these were already businesses that ran predominantly on Macallan orders. Waters is candid about the progression: they'd been managing these small family operations closely for years. "I was like, hang on a minute. Let's make them properly part of the family."
At the Tevasa cooperage in Jerez, thousands of oak staves are laid out in the Spanish sun to air-dry for a full year. When the wood is ready, it's coopered into casks by hand – steel on oak, fire bending staves into shape, men working in pairs so efficiently you can assume they’ve done it at least a thousand times. They turn out up to 80 casks a day, each one held together without nails or adhesive, purely by tension and heat. It's one of those cathartic, manual processes to watch that makes a man want to quit his desk job, if only for a minute.
From there, the casks are sent to Valdespino – the aforementioned fortified winery and bodega dating well back to 1264, widely considered the “Grand Cru” of sherry production. Thousands and thousands of sherry casks seasoned with Oloroso grapes are stacked sometimes four barrels high, in rows thrice deep. I so badly wanted to know how many casks were now under The Macallan’s umbrella. Hearsay suggests the distillery are custodians of somewhere between 200,000 and 300,000 casks at any given time.
I may as well be standing in the final scene of Raiders of the Lost Ark, except every single crate has The Macallan's name on it. The sheer volume and scale of the operation is staggering. The power move is overwhelmingly clear. This is no side hustle.
They wait patiently in this warehouse for 18 months, each with a unique tracking code stapled into the wood. Waters can now trace this oak back to specific forests in Galicia, name the forestry management practices, and confirm that only one to two per cent of logs are harvested from any given area before the forest is left to regenerate. The provenance story is difficult to poke holes in.
Casks, if you haven’t gathered by now, are the largest capital outlay in the whisky-making process. Both quality and margin prevail. But what’s not openly discussed on the warehouse floor is what happens when you acquire controlling stakes in two of the finest operations in the sherry triangle. You're also locking the door behind you. Every cask secured here is one fewer available to everyone else.
From Chop To Drop
A year and a half on, the casks are emptied, inspected, and shipped north to Scotland – from chop to drop, it’s a journey of roughly three to five years from the moment the tree was felled. At The Macallan's estate in Speyside, they enter a maturation programme overseen by lead whisky maker Kirsteen Campbell.
The distillery is a masterclass in everything except conventional distilling. A fine dining restaurant opened in late 2024. Cirque du Soleil has performed in the warehouses. Simple Minds and Mogwai have played the distillery floor. There is a James Bond partnership, of course. The red squirrels are protected. And a duo of custom-built Bentleys draped in ‘Macallan Red’ paint sit in the shadow of the iconic Easter Elchies House from the 1700s. For a company whose COO insists "you don't need marketing spin – you just tell people what you do well," they are clearly not allergic to a moment.
But the product, in their words, has always come first.
The Last Variable
Here's the tension that sat with me after arriving in Scotland: when you've engineered your supply chain to eliminate virtually every variable – roughly 600 checks and balances before a drop reaches a bottle, by The Macallan's own count – what's left for the love of the game?
I put this to Campbell. In a process this controlled, where does artistry survive?
"There's still artistry in that point where you're choosing which casks to bring together," she says. "You might have data that suggests those casks come together in the right way. But a human still needs to align all those flavours."
The Macallan has spent decades – and now serious capital – removing uncertainty from the equation, to let Campbell and her team do their job. The core range has to stay consistent for commercial viability. There's no room for improvisation when millions of bottles need to taste the same year on year. Especially to justify the $30 price jump above their competitors on the shelf.
Most distilleries buy casks. The Macallan bought the cooperage, the bodega, and the sawmills that feed them. The stated objective is consistency. The unstated advantage is control.
Every cask that passes through this ecosystem is one fewer available to the rest of the industry. In theory, a larger drinks group could attempt the same strategy. In practice, European oak takes generations to mature. Family-run cooperages take decades to build. Historic bodegas rarely come up for sale.
The question is no longer whether the strategy works. Somewhere in the labyrinth of casks beneath Jerez, that much felt obvious. The question is whether anyone else can still follow it, and follow through quickly enough. In whisky, as in forestry, the best time to plant a tree – or lay a cask – was 10 years ago.
