ACS: The Spanish Contractor That Gets 63% of Its Revenue From America

ACS has executed the most complete geographic transformation of any large European contractor, and the reason it worked is that it bought operating companies rather than trying to export Spanish crews. Turner in the United States, Hochtief in Germany, CIMIC in Australia — each is a local business with local management, and the parent supplies capital, coordination and strategic direction. This case study explains the model. It is part of the Spain Company Stories hub.

How did a Spanish contractor become mostly American?

By acquiring rather than expanding. ACS took control of Hochtief, the German contractor, which itself owned Turner Construction in the United States and a controlling interest in what became CIMIC in Australia. That single chain of ownership delivered leading positions in three of the largest construction markets in the world.

The strategic insight is that construction does not export well. A contractor’s competitive advantage is local: relationships with clients and subcontractors, knowledge of permitting and labour markets, bonding capacity and a track record in that jurisdiction. Sending Spanish management to compete in Texas achieves none of that.

What does transfer is capital allocation, risk management, procurement scale and the ability to pursue very large projects that a standalone national contractor could not bond. ACS supplies those and lets the operating companies remain local businesses under their own names.

Why are data centres so transformative?

Because they are enormous, technically demanding and being built at unprecedented speed. Turner has a pipeline that includes projects on a scale of billions of dollars for individual technology clients, and the sector’s growth explains almost all of ACS’s 2025 outperformance.

The economics are better than conventional construction. Data centre work is technically specialised — electrical distribution, cooling, redundancy, commissioning — which means fewer credible bidders and better margins. Turner’s profit before tax margin improved to 3.3%, which in general contracting is a strong number.

The Dornan acquisition was the strategic move that captured it. Buying an Irish electromechanical engineering specialist at the end of 2024 gave the group in-house capability in exactly the systems that make data centres complicated, converting ACS from a builder of shells into a provider of the technical fit-out that carries the margin.

What does the backlog tell you?

That the growth continues for several years. The order book stood at €92.9bn at the end of 2025, up 5.3% and 14.6% adjusted for exchange rates, on new awards exceeding €62.5bn during the year — up 26.9% at constant currency.

The composition is as important as the total. Management highlighted focus on digital, biopharma, defence, critical minerals and energy infrastructure — all sectors with structural demand drivers rather than cyclical construction spending, and all requiring technical capability rather than only price.

A backlog nearly double annual revenue gives roughly two years of visibility, which in contracting is a comfortable position. The question is margin rather than volume: whether work booked in a hot market can be delivered at the prices assumed when it was bid.

What is the role of the concessions business?

To convert contracting expertise into long-term asset ownership. ACS has an infrastructure investment arm that takes equity positions in concessions the group builds — roads, transport, social infrastructure — earning a return on capital over decades rather than a margin at handover.

The strategic logic is earnings quality. Contracting is cyclical, low-margin and dependent on continuous order intake; concession ownership is recurring, higher-margin and capitalised into asset value. Investors pay a considerably higher multiple for the second.

The tension is capital. Concessions consume equity that contracting working capital also demands, and how much to lock into long-term assets versus keep available for the contracting business is the central capital allocation question for every large contractor — the same one described in the Ferrovial case study.

What are the risks?

Concentration in a single demand cycle. Data centre construction is the driver of ACS’s current growth, and it depends on capital expenditure decisions by a small number of technology companies whose investment plans could change quickly.

Currency is the second. With 63% of sales in North America and 18% in Australia, reported results in euros move substantially with exchange rates — sales grew 19.7% reported and 25.3% at constant currency, a gap of over five percentage points in a single year.

The third is execution at scale. Building multi-billion-dollar projects on compressed schedules with specialist labour that is in short supply everywhere is precisely the environment in which cost overruns occur, and the industry’s margin structure leaves very little room for them.

What is Hochtief’s role?

It is the intermediate holding through which ACS controls Turner and CIMIC, and a substantial European contractor in its own right. The German group provides the corporate structure, credit standing and engineering depth beneath which the operating companies sit.

The arrangement is unusual and deliberate. ACS controls Hochtief, Hochtief controls Turner and a large stake in CIMIC, and each layer retains its own listing, management and market identity. That preserves local credibility while concentrating strategic control.

It also complicates the accounts. Minority interests at each level mean the profit attributable to ACS shareholders is considerably smaller than the profit the operating companies generate, which is why attributable and consolidated figures diverge so much in this group.

How does ACS compare with its Spanish peers?

It is the largest and the most contracting-weighted. Where Ferrovial has become primarily a concession owner with a construction arm, ACS remains predominantly a contractor with a concession investment business alongside.

The two models produce different financial profiles. Concession ownership generates recurring, higher-margin, capital-intensive earnings valued at high multiples; contracting generates larger revenue at thin margins with lower capital employed and a lower multiple.

Neither is superior in the abstract. ACS’s approach delivered €49.85bn of revenue and exposure to the data centre boom that a concession-focused group would have missed entirely; Ferrovial’s delivered a 38.6% total shareholder return on a much smaller revenue base.

What is the outlook?

Continued growth from a backlog that provides roughly two years of visibility, with the composition weighted toward digital, biopharma, defence, critical minerals and energy infrastructure rather than conventional building.

The margin question is whether current pricing survives delivery. Work booked in a market with scarce specialist capacity and urgent clients carries good margins on paper; whether they are realised depends on labour availability, equipment lead times and change management over a multi-year build.

The strategic risk is that the group’s growth is now closely tied to a single demand cycle. Diversification across geography and client type within data centres helps; it does not change the fact that a slowdown in technology capital expenditure would affect a large share of new awards simultaneously.

How does the group manage currency?

Imperfectly, because it cannot hedge a structural exposure. With 63% of sales in North America and 18% in Australia, reported euro results move with the dollar and Australian dollar regardless of operating performance.

The 2025 figures show the scale: sales grew 19.7% as reported and 25.3% at constant exchange rates, a gap of more than five percentage points, and EBITDA grew 25% reported against 32% currency-adjusted.

Partial natural hedging exists because costs are incurred in the same currencies as revenue, so operating margins are largely protected even when translated results are not. The exposure is to the reported figures and to the euro value of dividends repatriated, rather than to the underlying business.

What did 2026 add to the story?

The first quarter of 2026 extended the American surge rather than cooling it: ACS sales rose 12.5% at constant currency to €12.34bn, net profit climbed 21.5% to €232m and the backlog crossed €99.8bn, with Turner alone holding €42.3bn of it.

Turner’s pre-tax profit reached €246m in the quarter, up 40%, and new awards grew 32.9%. According to trade press, Turner secured ten contracts worth over USD 1bn each in the first months of 2026, most of them data centres and semiconductor-related campuses. Group EBITDA was €772m and net debt fell to €1.47bn, an improvement of €1.4bn in a year, even after returning €441m in cash to shareholders during the period. Earnings per share of €0.89 were up 19.3%.

The more strategic number is the €500m ACS invested in data-centre developments over the previous twelve months. The group is no longer only building the facilities; it is co-developing sites and selling stabilised assets to infrastructure funds, capturing a development margin on top of a construction margin. It is a hedge against the day hyperscalers slow their capital spending, and a way to convert engineering knowledge into equity value.

How does the ACS model compare with Ferrovial’s?

ACS and Ferrovial began as Spanish builders and ended in opposite places: ACS chose scale and a 63% American revenue base through owning contractors, while Ferrovial shrank its construction arm and concentrated on a few toll-road concessions and moved its domicile to Amsterdam.

The financial signatures differ accordingly. ACS generates close to €50bn of annual sales at low single-digit margins, and its equity story depends on cash conversion, backlog growth and disciplined bidding. Ferrovial’s Nasdaq relocation was built on roughly €9.6bn of revenue but far higher margins, with a single Canadian toll road worth more than most European contractors. One owns the builders; the other owns the roads.

Both approaches carry Spanish lessons for companies in Turkey or the Balkans that dream of international construction. Exporting labour and bids into foreign markets rarely works; buying an established local contractor and leaving its management in place does, but only with the balance sheet and patience to hold through cycles. ACS has spent more than two decades assembling Hochtief, CIMIC and Turner, and 2026 is the year the arithmetic of that patience became visible in the income statement.

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