Mr. Christian Mayer reports

COLLIERS TO PARTNER WITH SPECIALIST ENGINEERING AND DESIGN FIRM

Colliers International Group Inc.'s United States division of its engineering segment has entered into a definitive agreement to partner with Frankfurt-Short-Bruza Associates P.C. (FSB). FSB will establish a national aviation practice for Colliers Engineering & Design and significantly expand capabilities in the federal, mission-critical and Native American sectors. Under Colliers' unique partnership model, FSB's senior leadership team will become significant shareholders in Colliers Engineering and play a key role in its leadership going forward. Terms of the transaction were not disclosed. The transaction is expected to close in the second quarter of 2026.

Founded in 1945, FSB is an Oklahoma City-based multidisciplinary engineering and design firm with over 140 professionals across five offices, providing MEP engineering, structural engineering and architectural services. The firm has earned a national reputation as a leader in aviation facility design, backed by a portfolio of over $4.7-billion in federal and commercial aircraft hangar projects.

This transaction provides Colliers Engineering with immediate access to the high-barrier-to-entry aviation market, where FSB's best-in-class qualifications and longstanding client relationships are critical to success. FSB's focus on mission-critical markets also provides a significant opportunity for Colliers Engineering to capitalize on historic demand for data centre projects.

"FSB has built an exceptional reputation delivering complex aviation, federal and mission-critical projects," said Kevin L. Haney, PE, president and chief executive officer, Colliers Engineering, U.S. "Their design-led culture, deep engineering expertise and established client relationships are a perfect fit for our organization. We are thrilled to welcome their talented team and expand our capabilities in these growing end markets."

"Joining Colliers Engineering represents an exciting new chapter for our people and our clients," said Gene O. Brown, president and chief executive officer, FSB. "Colliers Engineering's commitment to technical excellence, partnership culture and client service aligns seamlessly with how we've built our business. Together, we will continue to take on larger, more complex engagements and deliver broader, integrated solutions to our clients."

Black Iron Advisers LLC acted as the exclusive financial adviser to FSB.

About Colliers International Group Inc.

Colliers 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 record of consistent growth and strong recurring cash flows, the company scales complementary, high-value businesses that provide essential services across the full asset life cycle.

The company's unique partnership philosophy empowers exceptional leaders, preserves the company's entrepreneurial culture and ensures meaningful inside ownership -- driving strong alignment and sustained value creation for its 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 the company's clients, investors and people worldwide.