Spanish construction giants near €200B order backlog milestone

Spain's largest construction firms are closing in on a milestone that seemed distant just a few years ago: a combined infrastructure backlog of nearly 200 billion euros. By the end of March 2026, the four biggest players listed on the Ibex 35—ACS, Acciona, Ferrovial, and Sacyr—had accumulated 160 billion euros in orders, with the pace of new contracts accelerating sharply through the first quarter. The numbers tell a story of an industry that has learned to be selective, profitable, and global.

ACS, the construction and services conglomerate led by Florentino Pérez, dominates the landscape with roughly 100 billion euros in its portfolio—nearly 62 percent of the combined total among the four. Acciona trails at just under 29 billion euros, while Ferrovial holds slightly more than 17 billion and Sacyr rounds out the group at 13 billion. When you add the backlogs of FCC and OHLA, two smaller but still substantial players, the industry's total production pipeline approaches the 200 billion threshold. And that number is likely to cross that line once contracts announced or about to be signed after the first quarter are counted.

What makes this moment significant is not just the size of the backlog but what it represents: a shift toward more complex, higher-margin work. ACS's chief executive, Juan Santamaría, told investors this week that Turner, the company's American subsidiary, is working on design-phase projects worth another 15 billion dollars—roughly 12.8 billion euros—that will be formally announced in coming months. The bulk of these pending contracts sit within the American digital infrastructure explosion, where more than 300 billion dollars in data center capacity is waiting to be built. Semiconductor manufacturing facilities make up a meaningful portion as well. "We are working on two installations," Santamaría said, offering a glimpse of the scale of opportunity his company sees in that sector.

ACS is also pushing hard into Asia. In India, a market dominated by local giants like Tata and Larsen&Toubro, the Spanish firm is on the verge of closing a contract to build its first semiconductor factory—a significant breakthrough in a country where foreign construction firms have struggled to gain footholds. The company is moving with similar intensity across emerging markets, treating them as essential to long-term growth.

Acciona, controlled by the Entrecanales family, has been equally deliberate about what it pursues. The company disclosed this week that it has 2.484 billion euros in contracts awaiting final signatures, deals that will swell its order book through the first half of 2026. Among them: a direct rail line on Australia's Sunshine Coast worth 1.102 billion euros—Australia remains Acciona's largest market—a desalination plant in the United Arab Emirates for 571 million euros, and a terminal expansion at Krakow airport in Poland for 154 million euros. More recently, Acciona submitted the only bid for a water management contract in Brazil's Paraiba state, a deal that carries 550 million euros in associated construction work.

Behind these numbers lies a fundamental shift in how Spanish contractors operate. They have become more disciplined about risk, more selective about which projects to chase, and more willing to structure deals collaboratively with clients—arrangements that distribute responsibility and, crucially, protect margins. In the first quarter of this year, ACS pushed its gross margins above 6 percent. Acciona is holding margins steady above 7 percent. Even Sacyr and FCC, which operate at tighter margins around 5 percent, have seen improvement, while OHLA managed to lift its margins to 7 percent last year. "As projects grow in complexity and value-added content, the margin grows with them," Santamaría noted.

Investors have taken notice. The strength of these backlogs, combined with the ability to convert production into operating profit, has made Spanish construction stocks attractive to those betting on a global infrastructure cycle. The major opportunities are concentrated in three regions: the United States, Australia, and Asia. In America, Spanish firms are pursuing both design-and-build contracts and concession deals that include long-term operation rights—a more lucrative model that locks in revenue streams for years. This is where the real growth is happening, and it is why Spain's construction giants are no longer just domestic players. They are becoming essential parts of the global infrastructure supply chain.