# EDGAR Filing Document

**Accession Number:** 0000913353
**File Stem:** 0001171843-26-001334
**Filing Date:** 2026-3
**Character Count:** 6184
**Document Hash:** 8ae5b0b1d2e95249b217601fc1894077
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001171843-26-001334.hdr.sgml**: 20260305

**ACCESSION NUMBER**: 0001171843-26-001334

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260303

**FILED AS OF DATE**: 20260305

**DATE AS OF CHANGE**: 20260305

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Colliers International Group Inc.
- **CENTRAL INDEX KEY:** 0000913353
- **STANDARD INDUSTRIAL CLASSIFICATION:** REAL ESTATE [6500]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A6
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36898
- **FILM NUMBER:** 26724144

**BUSINESS ADDRESS:**
- **STREET 1:** 1140 BAY STREET
- **STREET 2:** SUITE 4000
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M5S 2B4
- **BUSINESS PHONE:** (416) 960-9500

**MAIL ADDRESS:**
- **STREET 1:** 1140 BAY STREET
- **STREET 2:** SUITE 4000
- **CITY:** TORONTO
- **STATE:** A6
- **ZIP:** M5S 2B4

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIRSTSERVICE CORP
- **DATE OF NAME CHANGE:** 19931013

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

<u>**Form 6-K**</u>

**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 [ ] &nbsp;&nbsp;&nbsp;&nbsp; Form 40-F [ X ]

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**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.

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| | |
|:---|:---|
|  | **COLLIERS INTERNATIONAL GROUP INC.&nbsp;&nbsp;&nbsp;&nbsp;** |
| Date: March 5, 2026 | <u>*/s/ Christian Mayer*</u> |
|  | Name: Christian Mayer |
|  | Title: Chief Financial Officer |

---

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**EXHIBIT INDEX**

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| | |
|:---|:---|
| **Exhibit** | **Description of Exhibit** |
| [99.1](exh_991.htm) | [Press release dated March 5, 2026.](exh_991.htm) |

---

## Exhibit 99.1

**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