Colliers completes acquisition of Ayesa Engineering

The group expands the global reach of its engineering platform, with operations across 23 countries and 11,000 professionals.

Rosalío Alonso assumes the role of CEO of Ayesa Engineering effective today. Alongside him, several senior executives will hold equity stakes in the company, in line with Colliers’ partnership model.

May 27, 2026. Colliers (NASDAQ, TSX: CIGI), a global leader in professional services and investment management, announced today it has completed its previously announced acquisition of Ayesa Engineering, following receipt of the relevant regulatory approvals.

Colliers is a Canadian multinational listed on both the Nasdaq and the Toronto Stock Exchange. The transaction significantly strengthens its engineering division, further establishing it as a leading global player. Specializing in engineering design and project management services, Colliers Engineering will now operate across 23 countries with over 11,000 professionals, while reinforcing its capabilities in transportation and infrastructure, water and environmental services, buildings, and energy.

For its part, Ayesa Engineering has confirmed that its headquarters will remain in Seville, the city where the group was founded, further reinforcing its commitment to the development of highly qualified employment and economic activity in the region.

The company’s leadership team will remain in place and will hold equity stakes in the business, in line with Colliers’ partnership model.

Rosalío Alonso, previously the group’s Chief Operating Officer, will lead this new chapter as Chief Executive Officer of Ayesa Engineering. Alongside him, several senior executives will also become part of Colliers’ partnership structure.

“Ayesa is a highly strategic acquisition that meaningfully expands the global scale of our engineering business, strengthens the resilience of our earnings, and underscores the power of our partnership model,” said Jay Hennick, Global Chairman and Chief Executive Officer of Colliers. “Our ability to partner with exceptional operators and align them for long-term growth differentiates Colliers. More than 700 of our operators are partners in our engineering business, creating strong alignment, reinforcing our entrepreneurial culture, and driving long-term value creation. Looking ahead, we see significant opportunity to accelerate global growth within our engineering business, both organically and through acquisitions.”

“This acquisition strengthens our ability to serve clients in attractive, high-growth markets across Europe, Latin America, the Middle East and South Asia, while broadening our technical capabilities on a global scale,” said Elias Mulamoottil, Chief Investment Officer and CEO of Engineering at Colliers. “That expertise is reflected in Ayesa’s complex, high-profile projects such as the design and project oversight of the transformation of the Santiago Bernabéu Stadium in Madrid, the design of hundreds of desalination and water distribution facilities across Saudi Arabia, and the design and project oversight of several metro lines globally including the Bogotá Metro in Colombia.”

“Partnering with Colliers creates an exceptional opportunity for our professionals to become significant stakeholders in the business, reinforcing long-term stability and our focus on delivering the best outcomes for clients,” said Rosalío Alonso, Chief Executive Officer of Ayesa Engineering. “It also gives us the ability to leverage Colliers’ significant engineering operations in the U.S., Canada, and Australia, while benefiting from its more than 30-year track record of scaling global businesses and creating long-term value for all stakeholders.”

In connection with the transaction, Alantra acted as financial advisor and Uría Menéndez acted as legal advisor to Colliers. Baird and Arcano Partners acted as financial advisors and Pérez-Llorca and Weil, Gotshal & Manges acted as legal advisors to Ayesa Group and its owners, A&M Capital Europe and the Manzanares family.

About Ayesa Engineering

Ayesa Engineering is a leading multidisciplinary engineering and project management firm headquartered in Spain. With approximately 3,300 professionals operating in 21 countries, the company delivers innovative design, site supervision, and consultancy services across transportation, water, buildings & cities, and energy sectors. Ayesa Engineering is recognized for its technical excellence and ability to manage complex infrastructure projects for both public and private clients. Its approach combines deep sector expertise with a commitment to sustainability and cutting-edge solutions, making it a trusted partner in shaping the future of global infrastructure. For more information, visit www.ayesa.com

About Colliers

Colliers (NASDAQ, TSX: CIGI) is a global diversified professional services and investment management company operating through three industry-leading businesses: Commercial Real Estate, Engineering, and Investment Management. With greater than a 30-year track record of consistent growth and strong recurring cash flows, we scale complementary, high-value businesses that provide essential services across the full asset lifecycle. Our unique partnership philosophy empowers exceptional leaders, preserves our entrepreneurial culture, and ensures meaningful inside ownership — driving strong alignment and sustained value creation for our shareholders. With $5.7 billion in annual revenues, 24,000 professionals, and $109 billion in assets under management, Colliers is committed to accelerating the success of our clients, investors, and people worldwide. Learn more at corporate.colliers.com