Colliers (CIGI) elevates Mayer and Mulamoottil, plans leadership transition

Rhea-AI Filing Summary

Colliers International Group filed a report highlighting key leadership changes that support its long-term growth strategy. Christian Mayer has been appointed Global Chief Financial Officer & CEO of Commercial Real Estate, combining responsibility for enterprise-wide financial strategy with oversight of the Commercial Real Estate segment, the company’s largest platform.

Elias Mulamoottil has been named Global Chief Investment Officer & CEO of Engineering, leading the global Engineering platform while continuing to oversee investment strategy. Colliers noted that, following the closing of its acquisition of Ayesa, Colliers Engineering will operate in over 20 countries with more than 13,000 professionals. As part of this planned transition, long-serving executive Chris McLernon, CEO of Real Estate Services, will retire at the end of April after nearly 40 years with the company.

Colliers describes itself as a diversified professional services and investment management firm with $5.6 billion in annual revenues, 24,000 professionals, and $108 billion in assets under management, emphasizing its focus on sustained value creation and internal leadership development.

Insights

Governance & strategy analyst

Leadership changes consolidate key roles but keep strategy consistent.

The company is elevating long-tenured insiders into expanded positions over finance, real estate, engineering, and investments. This suggests an emphasis on continuity, with Christian Mayer and Elias Mulamoottil already deeply involved in Colliers’ core platforms and capital allocation decisions.

The planned retirement of long-time Real Estate Services CEO Chris McLernon is offset by clearly defined successor responsibilities split across Commercial Real Estate and Engineering. Because no new financial targets or structural overhauls are disclosed, these changes look like an evolution of existing strategy rather than a shift.

Future disclosures in regular filings may provide more detail on how the combined CFO/Commercial Real Estate and CIO/Engineering roles affect segment reporting, capital deployment, and integration of the Ayesa acquisition within Colliers Engineering’s more than 20-country footprint.

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FAQ

What executive leadership changes did Colliers (CIGI) announce in this 6-K?

Colliers announced two major promotions: Christian Mayer becomes Global Chief Financial Officer & CEO of Commercial Real Estate, and Elias Mulamoottil becomes Global Chief Investment Officer & CEO of Engineering. Both will continue leading enterprise-wide finance and investment strategy while overseeing the company’s largest operating platforms.

How do the new roles for Christian Mayer impact Colliers (CIGI)?

Christian Mayer will oversee Colliers’ Commercial Real Estate segment and remain responsible for enterprise-wide financial strategy. This combines operational leadership of the largest platform with control of company-wide finance, aligning segment performance, capital allocation, and long-term value creation under a single executive mandate.

What responsibilities will Elias Mulamoottil have in his new role at Colliers (CIGI)?

Elias Mulamoottil becomes Global Chief Investment Officer & CEO of Engineering, leading growth across the global Engineering platform while continuing to guide Colliers’ investment strategy. He will oversee expansion, capital deployment, and integration efforts, particularly as Colliers Engineering scales following the acquisition of Ayesa.

Did Colliers (CIGI) announce any executive retirement in this filing?

Yes. Colliers stated that Chris McLernon, CEO of Real Estate Services, will retire at the end of April after nearly 40 years with the company. Leadership responsibilities are being restructured, with Mayer and Mulamoottil taking expanded roles over Commercial Real Estate and Engineering, respectively.

How large is Colliers’ business according to this 6-K filing?

Colliers reports $5.6 billion in annual revenues, 24,000 professionals, and $108 billion in assets under management. The company operates globally through three main businesses: Commercial Real Estate, Engineering, and Investment Management, emphasizing diversified services and strong recurring cash flows across its platforms.

What does the 6-K say about Colliers Engineering after the Ayesa acquisition?

The filing states that, upon closing of the Ayesa acquisition, Colliers Engineering will operate in over 20 countries with more than 13,000 professionals. This significantly expands its global reach, technical capabilities, and capacity to deliver complex infrastructure and built-environment projects for public and private clients.

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER
THE SECURITIES EXCHANGE ACT OF 1934

For the month of March 2026
Commission File Number: 001-36898

COLLIERS INTERNATIONAL GROUP INC.
(Translation of registrant's name into English)

1140 Bay Street, Suite 4000
Toronto, Ontario, Canada
M5S 2B4
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F [   ]      Form 40-F [ X ]

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		COLLIERS INTERNATIONAL GROUP INC.
Date: March 5, 2026		/s/ Christian Mayer
		Name: Christian Mayer
		Title: Chief Financial Officer

EXHIBIT INDEX

Exhibit		Description of Exhibit
99.1		Press release dated March 5, 2026.

EXHIBIT 99.1

Colliers Appoints Christian Mayer and Elias Mulamoottil to Expanded Global Leadership Roles

Planned transition strengthens largest platforms and recognizes Chris McLernon’s retirement

TORONTO, March 05, 2026 (GLOBE NEWSWIRE) -- Colliers (NASDAQ, TSX: CIGI), a leading diversified professional services and investment management company, today announced two key executive appointments that reinforce the Company’s long-term growth strategy. Effective immediately, Christian Mayer has been named Global Chief Financial Officer & CEO of Commercial Real Estate, and Elias Mulamoottil has been named Global Chief Investment Officer & CEO of Engineering.

“With a combined four decades at Colliers, Christian and Elias bring deep experience, proven leadership, and a strong commitment to our enterprising culture,” said Jay Hennick, Founder, Global Chairman & CEO. “Their expanded mandates strengthen our largest platforms and ensure continuity as we continue to execute our global growth strategy company wide.”

As Global Chief Financial Officer & CEO of Commercial Real Estate, Mayer will oversee Colliers’ Commercial Real Estate segment and will continue to lead the Company’s enterprise-wide financial strategy. Colliers is one of the top global players in commercial real estate services with operations in 70 countries, offering services encompassing capital markets, leasing and outsourcing across all major asset classes. In this expanded role, Mayer will focus on advancing long-term value creation in Colliers’ largest platform.

As Global Chief Investment Officer & CEO of Engineering, Mulamoottil will drive growth across the global Engineering platform and will continue to oversee Colliers’ enterprise-wide investment strategy. Upon closing of the recently announced acquisition of Ayesa, Colliers Engineering will operate in over 20 countries with more than 13,000 professionals, significantly enhancing its global reach, technical capabilities, and ability to deliver complex, large-scale infrastructure and built-environment projects for public and private sector clients.

As part of the planned transition, Colliers also announced that Chris McLernon, CEO of Real Estate Services, will retire at the end of April following a nearly 40-year career with the Company.

“Chris has been instrumental in shaping Colliers across multiple regions and at the global level over the years,” said Hennick. “We are grateful for his leadership and commitment to Colliers and wish him well in retirement.”

These appointments further reinforce Colliers’ longstanding commitment to developing leaders from within and position the Company for continued momentum and long-term value creation.

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 $5.6 billion in annual revenues, 24,000 professionals, and $108 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.

Media Contact

Andrea Cheung
Senior Communications Manager
andrea.cheung@colliers.com
416-324-6402

Filing Exhibits & Attachments

1 document

Press Releases

• EX-99.1 PRESS RELEASE 4.4 KB