6-K

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: August 2017

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]

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): [ ]

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): [ ]

Indicate by check mark whether by furnishing the information contained in this Form, the Registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934:

Yes [ ] No [X]

If “Yes” is marked, indicate the file number assigned to the Registrant in connection with Rule 12g3-2(b): N/A

- 2 -

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, hereunto duly authorized.

	COLLIERS INTERNATIONAL GROUP INC.
Date: August 1, 2017	/s/ John B. Friedrichsen
	Name: John B. Friedrichsen
	Title: Chief Financial Officer

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EXHIBIT INDEX

Exhibit	Description of Exhibit
99.1	Press release dated August 1, 2017 announcing financial results for the second quarter ended June 30, 2017.

99.2 Supplemental slide presentation dated August 1, 2017.

EX-99.1

EXHIBIT 99.1

Colliers International reports strong results for second quarter

Revenues up 13% (15% in local currency) and solid increase to earnings

Operating highlights:

	Three months ended				Six months ended
	June 30				June 30
(in millions of US$, except EPS)	2017		2016		2017		2016
Revenues	$	544.2	$	482.5	$	967.1	$	858.6
Adjusted EBITDA (note 1)		59.6		52.8		88.9		75.0
Adjusted EPS (note 2)		0.76		0.63		1.09		0.82
GAAP operating earnings		40.6		37.6		51.5		46.5
GAAP EPS		0.28		0.55		0.28		0.37

TORONTO, Aug. 01, 2017 (GLOBE NEWSWIRE) -- Colliers International Group Inc. (NASDAQ:CIGI) (TSX:CIGI) today reported operating and financial results for its second quarter ended June 30, 2017. All amounts are in US dollars.

Revenues for the second quarter were $544.2 million, a 13% increase (15% in local currency) relative to the same quarter in the prior year, adjusted EBITDA (note 1) was $59.6 million, up 13% (16% in local currency) and adjusted EPS (note 2) was $0.76, a 21% increase versus the prior year quarter. Second quarter adjusted EPS would have been approximately $0.03 higher excluding foreign exchange impacts. GAAP operating earnings were $40.6 million, relative to $37.6 million in the prior year period. GAAP EPS was $0.28 per share in the quarter, versus $0.55 per share for the same quarter a year ago, with the current period impacted by a significant increase in the non-controlling interest redemption increment related to the quarterly non-cash balance sheet revaluation of non-controlling interests. Second quarter GAAP EPS would have been approximately $0.03 higher excluding changes in foreign exchange rates.

For the six months ended June 30, 2017, revenues were $967.1 million, a 13% increase (14% in local currency) relative to the comparable prior year period, adjusted EBITDA was $88.9 million, up 19% (21% in local currency) and adjusted EPS was $1.09, a 33% increase versus the prior year period. Year-to-date adjusted EPS would have been approximately $0.03 higher excluding foreign exchange impacts. GAAP operating earnings were $51.5 million, relative to $46.5 million in the prior year period. GAAP EPS for the six month period was $0.28 per share, compared to $0.37 per share in the prior year period. Year-to-date GAAP EPS would have been approximately $0.03 higher excluding changes in foreign exchange rates.

“Colliers generated strong results in the second quarter, with a combination of growth from recent acquisitions and internal growth. Based on results to date and current business pipelines, we remain optimistic about our prospects for the balance of the year,” said Jay S. Hennick, Chairman and CEO of Colliers International. “During the second quarter, we completed the acquisition of Colliers Minneapolis-St. Paul, further strengthening our operations in the US Midwest, and bringing the number of acquisitions completed this year to five. With strong market momentum, a disciplined growth strategy, long-term track record of success and strong balance sheet, we are better positioned than ever to continue capitalizing on growth opportunities and strengthening the Colliers International brand and global platform for the future,” he concluded.

About Colliers International Group Inc.
Colliers International Group Inc. (NASDAQ:CIGI) (TSX:CIGI) is an industry-leading global real estate services company with 15,000 skilled professionals operating in 68 countries. With an enterprising culture and significant employee ownership, Colliers professionals provide a full range of services to real estate occupiers, owners and investors worldwide. Services include strategic advice and execution for property sales, leasing and finance; global corporate solutions; property, facility and project management; workplace solutions; appraisal, valuation and tax consulting; customized research; and thought leadership consulting.

Colliers professionals think differently, share great ideas and offer thoughtful and innovative advice that help clients accelerate their success. Colliers has been ranked among the top 100 global outsourcing firms by the International Association of Outsourcing Professionals for 12 consecutive years, more than any other real estate services firm.

For the latest news from Colliers, visit Colliers.com or follow us on Twitter: @Colliers and LinkedIn.

Consolidated Revenues

	Three months ended						Six months ended
(in thousands of US$)	June 30				Growth	Growth	June 30				Growth	Growth
(LC = local currency)	2017		2016		in US$ %	in LC %	2017		2016		in US$ %	in LC %
Outsourcing & Advisory	$	197,633	$	179,809	10%	13%	$	361,198	$	339,627	6%	8%
Lease Brokerage		174,379		151,807	15%	16%		311,238		264,692	18%	19%
Sales Brokerage		172,205		150,920	14%	15%		294,623		254,325	16%	16%
Total revenues	$	544,217	$	482,536	13%	15%	$	967,059	$	858,644	13%	14%

Consolidated revenues for the second quarter grew 15% on a local currency basis, with robust contributions from each service line. Consolidated internal revenue growth in local currencies was 1% (note 3) affected by a slight decline in lower margin Outsourcing & Advisory activity in the EMEA region relative to strong comparatives in the prior year period. Excluding this difference, consolidated internal revenue growth in local currencies was 3%.

For the six months ended June 30, 2017, consolidated revenues grew 14% on a local currency basis. Year-to-date consolidated internal revenue growth in local currencies was 1% impacted by a decline in lower margin Outsourcing & Advisory activity in the EMEA region relative to very strong comparatives in the prior year period. Excluding this difference, consolidated internal revenue growth in local currencies was 4%.

Segmented Quarterly Results
The Americas region’s revenues totalled $319.8 million for the second quarter compared to $263.0 million in the prior year quarter, up 22% (23% on a local currency basis). Local currency revenue growth was comprised of 22% growth from recent acquisitions and 1% internal growth. Internal growth for the quarter was impacted by a modest decline in Sales and Lease Brokerage revenues in the US, where transaction volume was flat and average transaction size was down slightly. Adjusted EBITDA was $32.2 million, versus $28.4 million in the prior year quarter, up 14% with the margin impacted by (i) recent investments in people to strengthen operations and add service line capabilities and (ii) revenue mix. GAAP operating earnings were $22.2 million, versus $22.6 million in the prior year period, impacted by amortization of intangible assets acquired in connection with recent acquisitions incurred in the current quarter.

EMEA region revenues totalled $118.8 million for the second quarter compared to $117.2 million in the prior year quarter, up 1% (6% on a local currency basis). Local currency revenue growth was comprised of 6% growth from recent acquisitions and flat internal revenues. Internal revenues were impacted by a decline in Outsourcing & Advisory activity, particularly in France with several large project management assignments in the prior year quarter involving the supply and installation of materials at lower margins than other revenue types. Foreign exchange headwinds with respect to the UK pound sterling negatively affected results on a US dollar reporting currency basis. Adjusted EBITDA was $17.3 million, versus $17.1 million in the prior year quarter. GAAP operating earnings were $11.6 million, versus $11.7 million in the prior year quarter, impacted by acquisition-related costs incurred in the current quarter.

Asia Pacific region revenues totalled $105.1 million for the second quarter compared to $102.1 million in the prior year quarter, up 3% (3% on a local currency basis) all from internal growth, particularly Outsourcing & Advisory revenues. Adjusted EBITDA was $12.9 million, up from $10.5 million in the prior year quarter, benefitting from operating leverage. GAAP operating earnings were $11.4 million, versus $9.1 million in the prior year period.

Global corporate costs as reported in adjusted EBITDA were $2.8 million in the second quarter, relative to $3.1 million in the prior year period. The corporate GAAP operating loss for the second quarter was $4.6 million, relative to $5.8 million in the prior period, with the prior period impacted by restructuring costs related to the consolidation of global leadership to Toronto.

Conference Call
Colliers will be holding a conference call on Tuesday, August 1, 2017 at 11:00 a.m. Eastern Time to discuss the quarter’s results. The call, as well as a supplemental slide presentation, will be simultaneously web cast and can be accessed live or after the call at www.colliers.com in the “Shareholders / Newsroom” section.

Forward-looking Statements
This press release includes or may include forward-looking statements. Forward-looking statements include the Company’s financial performance outlook and statements regarding goals, beliefs, strategies, objectives, plans or current expectations. These statements involve known and unknown risks, uncertainties and other factors which may cause the actual results to be materially different from any future results, performance or achievements contemplated in the forward-looking statements. Such factors include: economic conditions, especially as they relate to commercial and consumer credit conditions and business spending; commercial real estate property values, vacancy rates and general conditions of financial liquidity for real estate transactions; the effects of changes in foreign exchange rates in relation to the US dollar on Canadian dollar, Australian dollar, UK pound sterling and Euro denominated revenues and expenses; competition in markets served by the Company; labor shortages or increases in commission, wage and benefit costs; disruptions or security failures in information technology systems; and political conditions or events, including elections, referenda, changes to international trade and immigration policies, and any outbreak or escalation of terrorism or hostilities.

Additional factors and explanatory information are identified in the Company’s Annual Information Form for the year ended December 31, 2016 under the heading “Risk Factors” (which factors are adopted herein and a copy of which can be obtained at www.sedar.com) and other periodic filings with Canadian and US securities regulators. Forward looking statements contained in this press release are made as of the date hereof and are subject to change. All forward-looking statements in this press release are qualified by these cautionary statements. Except as required by applicable law, Colliers undertakes no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.

Summary financial information is provided in this press release. This press release should be read in conjunction with the Company's quarterly financial statements and MD&A to be made available on SEDAR at www.sedar.com.

Notes
1. Reconciliation of net earnings to adjusted EBITDA:

Adjusted EBITDA is defined as net earnings, adjusted to exclude: (i) income tax; (ii) other expense (income); (iii) interest expense; (iv) depreciation and amortization; (v) acquisition-related items; (vi) restructuring costs and (vii) stock-based compensation expense. We use adjusted EBITDA to evaluate our own operating performance and our ability to service debt, as well as an integral part of our planning and reporting systems. Additionally, we use this measure in conjunction with discounted cash flow models to determine the Company’s overall enterprise valuation and to evaluate acquisition targets. We present adjusted EBITDA as a supplemental measure because we believe such measure is useful to investors as a reasonable indicator of operating performance because of the low capital intensity of the Company’s service operations. We believe this measure is a financial metric used by many investors to compare companies, especially in the services industry. This measure is not a recognized measure of financial performance under GAAP in the United States, and should not be considered as a substitute for operating earnings, net earnings or cash flow from operating activities, as determined in accordance with GAAP. Our method of calculating adjusted EBITDA may differ from other issuers and accordingly, this measure may not be comparable to measures used by other issuers. A reconciliation of net earnings to adjusted EBITDA appears below.

	Three months ended						Six months ended
(in thousands of US$)	June 30						June 30
	2017			2016			2017			2016
Net earnings	$	25,522		$	23,756		$	31,029		$	27,787
Income tax		12,584			12,861			16,242			15,931
Other income, net		(807	)		(1,220	)		(2,036	)		(1,820	)
Interest expense, net		3,279			2,227			6,221			4,591
Operating earnings		40,578			37,624			51,456			46,489
Depreciation and amortization		14,381			10,616			26,408			21,649
Acquisition-related items		3,310			973			7,519			2,045
Restructuring costs		308			2,776			1,040			2,776
Stock-based compensation expense		1,030			806			2,473			2,018
Adjusted EBITDA	$	59,607		$	52,795		$	88,896		$	74,977

2. Reconciliation of net earnings and diluted net earnings per common share to adjusted net earnings and adjusted earnings per share:

Adjusted earnings per share is defined as diluted net earnings per common share, adjusted for the effect, after income tax, of: (i) the non-controlling interest redemption increment; (ii) amortization expense related to intangible assets recognized in connection with acquisitions; (iii) acquisition-related items; (iv) restructuring costs and (v) stock-based compensation expense. We believe this measure is useful to investors because it provides a supplemental way to understand the underlying operating performance of the Company and enhances the comparability of operating results from period to period. Adjusted earnings per share is not a recognized measure of financial performance under GAAP, and should not be considered as a substitute for diluted net earnings per share, as determined in accordance with GAAP. Our method of calculating this non-GAAP measure may differ from other issuers and, accordingly, this measure may not be comparable to measures used by other issuers. A reconciliation of net earnings to adjusted net earnings and of diluted net earnings per share to adjusted earnings per share appears below.

	Three months ended						Six months ended
(in thousands of US$)	June 30						June 30
	2017			2016			2017			2016
Net earnings	$	25,522		$	23,756		$	31,029		$	27,787
Non-controlling interest share of earnings		(5,003	)		(5,559	)		(7,116	)		(7,973	)
Amortization of intangible assets		7,915			4,792			13,965			10,428
Acquisition-related items		3,310			973			7,519			2,045
Restructuring costs		308			2,776			1,040			2,776
Stock-based compensation expense		1,030			806			2,473			2,018
Income tax on adjustments		(2,456	)		(2,548	)		(4,466	)		(4,239	)
Non-controlling interest on adjustments		(885	)		(432	)		(1,729	)		(934	)
Adjusted net earnings	$	29,741		$	24,564		$	42,715		$	31,908
	Three months ended						Six months ended
(in US$)	June 30						June 30
	2017			2016			2017			2016
Diluted net earnings per common share	$	0.28		$	0.55		$	0.28		$	0.37
Non-controlling interest redemption increment		0.25			(0.08	)		0.33			0.14
Amortization of intangible assets, net of tax		0.13			0.08			0.22			0.17
Acquisition-related items		0.08			0.02			0.18			0.05
Restructuring costs, net of tax		-			0.04			0.02			0.04
Stock-based compensation expense, net of tax		0.02			0.02			0.06			0.05
Adjusted earnings per share	$	0.76		$	0.63		$	1.09		$	0.82

3. Local currency revenue growth rates and internal revenue growth rates

Percentage revenue variances presented on a local currency basis are calculated by translating the current period results of our non-US dollar denominated operations to US dollars using the foreign currency exchange rates from the periods against which the current period results are being compared. Percentage revenue variances presented on an internal growth basis are calculated assuming acquired entities were owned for the entire current period as well as the entire prior period. Revenue from acquired entities is estimated based on the operating performance of each acquired entity for the year prior to the acquisition date. We believe that these revenue growth rate methodologies provide a framework for assessing the Company’s performance and operations excluding the effects of foreign currency exchange rate fluctuations and acquisitions. Since these revenue growth rate measures are not calculated under GAAP, they may not be comparable to similar measures used by other issuers.

COLLIERS INTERNATIONAL GROUP INC.
Condensed Consolidated Statements of Earnings (Loss)
(in thousands of US dollars, except per share amounts)
		Three months						Six months
		ended June 30						ended June 30
(unaudited)		2017			2016			2017			2016
Revenues	$	544,217		$	482,536		$	967,059		$	858,644
Cost of revenues		333,741			294,968			592,612			531,835
Selling, general and administrative expenses		152,207			138,355			289,064			256,626
Depreciation		6,466			5,824			12,443			11,221
Amortization of intangible assets		7,915			4,792			13,965			10,428
Acquisition-related items (1)		3,310			973			7,519			2,045
Operating earnings		40,578			37,624			51,456			46,489
Interest expense, net		3,279			2,227			6,221			4,591
Other income		(807	)		(1,220	)		(2,036	)		(1,820	)
Earnings before income tax		38,106			36,617			47,271			43,718
Income tax		12,584			12,861			16,242			15,931
Net earnings		25,522			23,756			31,029			27,787
Non-controlling interest share of earnings		5,003			5,559			7,116			7,973
Non-controlling interest redemption increment		9,686			(3,205	)		12,961			5,608
Net earnings attributable to Company	$	10,833		$	21,402		$	10,952		$	14,206
Net earnings per common share
Basic	$	0.28		$	0.55		$	0.28		$	0.37
Diluted	$	0.28		$	0.55		$	0.28		$	0.37
Adjusted earnings per share (2)	$	0.76		$	0.63		$	1.09		$	0.82
Weighted average common shares (thousands)
Basic		38,829			38,594			38,775			38,576
Diluted		39,317			38,875			39,212			38,839

Notes to Condensed Consolidated Statements of Earnings (Loss)
(1) Acquisition-related items include transaction costs, contingent acquisition consideration fair value adjustments, and contingent acquisition consideration-related compensation expense.
(2) See definition and reconciliation above.

Condensed Consolidated Balance Sheets
(in thousands of US dollars)
(unaudited)	June 30, 2017		December 31, 2016		June 30, 2016
Assets
Cash and cash equivalents	$	122,982	$	113,148	$	96,682
Accounts receivable		316,985		311,020		291,156
Prepaids and other assets		91,532		82,154		77,605
Current assets		531,499		506,322		465,443
Other non-current assets		56,601		48,860		35,759
Fixed assets		78,048		65,274		63,764
Deferred income tax		66,063		82,252		93,019
Goodwill and intangible assets		628,464		487,563		472,856
Total assets	$	1,360,675	$	1,190,271	$	1,130,841
Liabilities and shareholders' equity
Accounts payable and accrued liabilities	$	430,726	$	483,376	$	389,501
Other current liabilities		43,401		24,890		18,375
Long-term debt - current		3,312		1,961		2,200
Current liabilities		477,439		510,227		410,076
Long-term debt - non-current		424,119		260,537		337,297
Other liabilities		69,483		57,609		55,341
Deferred income tax		15,910		14,582		18,937
Redeemable non-controlling interests		137,855		134,803		140,632
Shareholders' equity		235,869		212,513		168,558
Total liabilities and equity	$	1,360,675	$	1,190,271	$	1,130,841
Supplemental balance sheet information
Total debt	$	427,431	$	262,498	$	339,497
Total debt, net of cash		304,449		149,350		242,815
Net debt / pro forma adjusted EBITDA ratio		1.3		0.7		1.2

Consolidated Statements of Cash Flows
(in thousands of US dollars)
		Three months ended						Six months ended
		June 30						June 30
(unaudited)		2017			2016			2017			2016
Cash provided by (used in)
Operating activities
Net earnings	$	25,522		$	23,756		$	31,029		$	27,787
Items not affecting cash:
Depreciation and amortization		14,381			10,616			26,408			21,649
Deferred income tax		2,188			3,430			3,366			4,087
Other		7,824			6,864			16,044			8,193
		49,915			44,666			76,847			61,716
Net change from assets/liabilities
Accounts receivable		(21,922	)		(38,047	)		10,826			11,260
Payables and accruals		23,688			16,359			(121,419	)		(84,835	)
Other		9,576			4,173			13,767			(4,133	)
Contingent acquisition consideration paid		-			-			(301	)		-
Net cash provided by (used in) operating activities		61,257			27,151			(20,280	)		(15,992	)
Investing activities
Acquisition of businesses, net of cash acquired		(21,360	)		(9,751	)		(51,003	)		(46,326	)
Purchases of fixed assets		(13,768	)		(6,495	)		(20,501	)		(10,682	)
Other investing activities		(6,425	)		(7,778	)		(17,021	)		(13,920	)
Net cash used in investing activities		(41,553	)		(24,024	)		(88,525	)		(70,928	)
Financing activities
Increase in long-term debt, net		17,215			21			157,352			86,488
Purchases of non-controlling interests, net		(5,594	)		(4,257	)		(29,876	)		(3,637	)
Dividends paid to common shareholders		-			-			(1,932	)		(1,541	)
Distributions paid to non-controlling interests		(6,874	)		(5,143	)		(10,992	)		(10,259	)
Other financing activities		(339	)		(212	)		(400	)		978
Net cash provided by (used in) financing activities		4,408			(9,591	)		114,152			72,029
Effect of exchange rate changes on cash		1,175			(4,322	)		4,487			(4,577	)
Increase (decrease) in cash and cash equivalents		25,287			(10,786	)		9,834			(19,468	)
Cash and cash equivalents, beginning of period		97,695			107,468			113,148			116,150
Cash and cash equivalents, end of period	$	122,982		$	96,682		$	122,982		$	96,682

Segmented Results
(in thousands of US dollars)
					Asia
(unaudited)	Americas		EMEA		Pacific		Corporate			Consolidated
Three months ended June 30
2017
Revenues	$	319,829	$	118,792	$	105,085	$	511		$	544,217
Adjusted EBITDA		32,204		17,298		12,919		(2,814	)		59,607
Operating earnings		22,152		11,634		11,397		(4,605	)		40,578
2016
Revenues	$	262,964	$	117,177	$	102,122	$	273		$	482,536
Adjusted EBITDA		28,360		17,086		10,488		(3,139	)		52,795
Operating earnings		22,581		11,747		9,127		(5,831	)		37,624
					Asia
	Americas		EMEA		Pacific		Corporate			Consolidated
Six months ended June 30
2017
Revenues	$	576,787	$	207,814	$	181,477	$	981		$	967,059
Adjusted EBITDA		53,422		20,908		19,160		(4,594	)		88,896
Operating earnings		33,629		10,568		16,253		(8,994	)		51,456
2016
Revenues	$	473,509	$	216,092	$	168,563	$	480		$	858,644
Adjusted EBITDA		49,971		16,525		13,770		(5,289	)		74,977
Operating earnings		39,538		5,858		11,061		(9,968	)		46,489

COMPANY CONTACTS:

Jay S. Hennick
Chairman & CEO
                       
John B. Friedrichsen
CFO

(416) 960-9500

EX-99.2

EXHIBIT 99.2

Colliers International Group Inc. Second Quarter 2017 Financial Results August 1, 2017

Colliers International 2017 Forward - Looking Statements 2 This presentation includes or may include forward - looking statements. Forward - looking statements include the Company’s financial performance outlook and statements regarding goals, beliefs, strategies, objectives, plans or current expectations. These statements involve known and unknown risks, uncertainties and other factors which may cause the actual results to be materially different from any future results, performance or achievements contemplated in the forward - looking statements. Such factors include: economic conditions, especially as they relate to commercial and consumer credit conditions and business spending; commercial real estate property values, vacancy rates and general conditions of financial liquidity for real estate transactions; the effects of changes in foreign exchange rates in relation to the US dollar on Cana dia n dollar, Australian dollar, UK pound sterling and Euro denominated revenues and expenses; competition in markets served by the Company; labor shortages or increases in commission, wage and benefit costs; disruptions or security failures in information technology systems; and political conditions or events, including elections, referenda, changes to international trade and immigration policies and any outbreak or escalation of terrorism or hostilities. Additional factors and explanatory information are identified in the Company’s Annual Information Form for the year ended December 31, 2016 under the heading “Risk Factors” (which factors are adopted herein and a copy of which can be obtained at www.sedar.com ) and other periodic filings with Canadian and US securities regulators. Forward looking statements contained in this presentation are made as of the date hereof and are subject to change. All forward - looking statements in this press release are qualified by these cautionary statements. Except as required by applicable law, Colliers undertakes no obligation to publicly update or revise any forward - looking statement, whether as a result of new information, future events or otherwise. Non - GAAP measures This presentation makes reference to the non - GAAP measures Adjusted EBITDA and Adjusted EPS. Please refer to Appendix for reconciliations to GAAP measures.

Colliers International 2017 ▪ Revenue up 13% (15% in local currency) and solid increase to earnings ▪ Completed acquisition of Colliers Minneapolis - St. Paul, further strengthening operations in the US Midwest, bringing the number of acquisitions completed year - to - date to five ▪ Declared semi - annual dividend of US$0.05 per common share Second Quarter 2017 Results 3

Colliers International 2017 4 Second Quarter 2017 Results Summary (US$ millions, except per share amounts) (1) Local currency (“LC”) basis, excluding the effects of foreign currency exchange rate fluctuations. USD LC (1) Revenue 544.2 482.5 13% 15% Adjusted EBITDA 59.6 52.8 13% 16% Adjusted EBITDA Margin 11.0% 10.9% Adjusted EPS 0.76 0.63 21% GAAP Operating Earnings 40.6 37.6 8% GAAP Operating Earnings Margin 7.5% 7.8% GAAP EPS 0.28 0.55 -49% USD LC (1) Revenue 967.1 858.6 13% 14% Adjusted EBITDA 88.9 75.0 19% 21% Adjusted EBITDA Margin 9.2% 8.7% Adjusted EPS 1.09 0.82 33% GAAP Operating Earnings 51.5 46.5 11% GAAP Operating Earnings Margin 5.3% 5.4% GAAP EPS 0.28 0.37 -24% Q2 2017 Q2 2016 % Change over Q2 2016 YTD 2017 YTD 2016 % Change over YTD 2016

Colliers International 2017 174.4 151.8 172.2 150.9 197.6 179.8 544.2 482.5 2017 2016 5 Outsourcing & Advisory (1) Sales Brokerage Lease Brokerage Q2 Revenue Second Quarter 2017 Consolidated Revenues (US$ millions) (1) Outsourcing & Advisory services include: Corporate Solutions, Valuation & Advisory Services, Property and Asset Manageme nt Services, Project Management, Workplace Solutions, Property Marketing and Research Services. % Change over Q2 2016 USD LC Outsourcing & Advisory 10% 13% Sales Brokerage 14% 15% Lease Brokerage 15% 16% Total 13% 15% Revenue Mix Q2 2017 Q2 2016 Outsourcing & Advisory 36% 37% Sales Brokerage 32% 31% Lease Brokerage 32% 32% Total 100% 100%

Colliers International 2017 311.2 264.7 294.6 254.3 361.2 339.6 967.1 858.6 2017 2016 6 Outsourcing & Advisory (1) Sales Brokerage Lease Brokerage YTD Revenue Year To Date 2017 Consolidated Revenues (US$ millions) (1) Outsourcing & Advisory services include: Corporate Solutions, Valuation & Advisory Services, Property and Asset Manageme nt Services, Project Management, Workplace Solutions, Property Marketing and Research Services. % Change over YTD 2016 USD LC Outsourcing & Advisory 6% 8% Sales Brokerage 16% 16% Lease Brokerage 18% 19% Total 13% 14% Revenue Mix 2017 YTD 2016 YTD Outsourcing & Advisory 37% 39% Sales Brokerage 31% 30% Lease Brokerage 32% 31% Total 100% 100%

Colliers International 2017 7 Q2 2017 Adjusted EBITDA (1) Second Quarter Geographic Split (US$ millions) Q2 2017 Revenue Q2 2016 Revenue Q2 2016 Adjusted EBITDA (2) (1) Q2 2017 GAAP Operating Earnings: $22.2M Americas, $11.6M EMEA, $11.4M Asia Pacific (2) Q2 2016 GAAP Operating Earnings: $22.6M Americas, $ 11.7M EMEA, $9.1M Asia Pacific 59% 22% 19% Americas 319.8 EMEA 118.8 Asia Pacific 105.1 Americas 263.0 EMEA 117.2 Asia Pacific 102.1 55% 24% 21% Americas 32.2 EMEA 17.3 Asia Pacific 12.9 51% 28% 21% 51% 30% 19% Americas 28.4 EMEA 17.1 Asia Pacific 10.5

Colliers International 2017 ▪ Revenues up 23% in local currencies, with 22 % growth from recent acquisitions and 1% from internal growth ▪ Internal growth impacted by a modest decline in US Sales and Lease Brokerage revenues where transaction volume was flat and average transaction size was down slightly ▪ Adjusted EBITDA up 14%, impacted by (i) recent investments in people to strengthen operations and add service line capabilities and (ii) revenue mix 124.9 104.3 100.6 81.5 94.3 77.2 319.8 263.0 Q2 2017 Q2 2016 8 Revenue Americas (US$ millions) Outsourcing & Advisory (1) Sales Brokerage Lease Brokerage (1) Outsourcing & Advisory services include: Corporate Solutions, Valuation & Advisory Services, Property and Asset Management Services, Project Management, Workplace Solutions, Property Marketing and Research Services. (2) GAAP Operating Earnings: Q2 2017 $22.2M at 6.9% margin ; Q2 2016 $22.6M at 8.6% margin Adjusted EBITDA (2) (Adjusted EBITDA Margin) 32.2 28.4 10.1% 10.8% 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 Q2 2017 Q2 2016 USD LC Internal Growth (LC) Revenue Growth 22% 23% 1%

Colliers International 2017 ▪ 6% growth from recent acquisitions and flat internal revenues ▪ Internal revenues impacted by a decline in Outsourcing & Advisory activity, particularly in France with several large project management assignments in the prior year quarter involving the supply and installation of materials at lower margins than other service lines ▪ Foreign exchange headwinds of 5% negatively affected results on a US dollar basis, primarily UK pound sterling 26.3 24.8 27.3 24.1 65.2 68.2 118.8 117.2 Q2 2017 Q2 2016 9 Revenue EMEA (US$ millions) Outsourcing & Advisory (1) Sales Brokerage Lease Brokerage (1) Outsourcing & Advisory services include: Corporate Solutions, Valuation & Advisory Services, Property and Asset Management Services, Project Management, Workplace Solutions, Property Marketing and Research Services. (2) GAAP Operating Earnings: Q2 2017 $11.6M at 9.8% margin ; Q2 2016 $11.7M at 10.0% margin Adjusted EBITDA (2) (Adjusted EBITDA Margin) USD LC Internal Growth (LC) Revenue Growth 1% 6% 0% 17.3 17.1 14.6% 14.6% 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 Q2 2017 Q2 2016

Colliers International 2017 ▪ 3% revenue growth in local currencies, all from internal growth ▪ Internal growth was driven by strong Outsourcing & Advisory revenues offset by modest decline in Sales Brokerage due to several transactions in Australia in the prior year quarter ▪ Adjusted EBITDA reflects benefit of operating leverage in several Asian markets 23.1 22.6 44.3 45.3 37.7 34.1 105.1 102.1 Q2 2017 Q2 2016 10 Revenue Asia Pacific (US$ millions) Outsourcing & Advisory (1) Sales Brokerage Lease Brokerage (1) Outsourcing & Advisory services include: Corporate Solutions, Valuation & Advisory Services, Property and Asset Management Services, Project Management, Workplace Solutions, Property Marketing and Research Services. (2) GAAP Operating Earnings: Q2 2017 $11.4M at 10.8% margin ; Q2 2016 $9.1M at 8.9% margin Adjusted EBITDA (2) (Adjusted EBITDA Margin) USD LC Internal Growth (LC) Revenue Growth 3% 3% 3% 12.9 10.5 12.3% 10.3% 0.0 5.0 10.0 15.0 20.0 25.0 Q2 2017 Q2 2016

Colliers International 2017 11 Highlights ▪ Net debt / pro forma adjusted EBITDA leverage reflects seasonal working capital utilization as well as year to date acquisition spend ▪ Anticipated capital expenditures of $40 - 45 million for full year 2017 Capitalization & Capital Allocation Overview (US$ millions) (1) Includes business acquisitions, contingent acquisition consideration and purchases of non - controlling interests in subsidia ries. Cash $ 123.0 $ 113.1 $ 96.7 Total Debt 427.4 262.5 339.5 Net Debt $ 304.4 $ 149.4 $ 242.8 Redeemable non-controlling interests 137.9 134.8 140.6 Shareholders' equity 235.9 212.5 168.6 Total capitalization $ 678.2 $ 496.7 $ 552.0 Net debt / pro forma adjusted EBITDA 1.3 0.7 1.2 Capital Expenditures $ 13.8 $ 6.5 Acquisition Spend (1) $ 27.2 $ 14.3 Capital Expenditures $ 20.5 $ 10.7 Acquisition Spend (1) $ 84.9 $ 50.7 6 Months Ended June 30, 2017 June 30, 2016 June 30, 2017 December 31, 2016 June 30, 2016 3 Months Ended June 30, 2017 June 30, 2016

Colliers International 2017 ▪ 2017 Outlook o Revenue pipelines for second half of year reflect sustained activity across all service lines o Generally stable conditions in most markets, despite ongoing geopolitical uncertainty o Despite interest rate increases in select regions, rates remain low and unlikely to increase materially in the foreseeable future o Low double - digit percentage revenue growth in local currency, given acquisitions completed year to date, including low single - digit percentage internal revenue growth o Adjusted EBITDA margin consistent with 2016 o Low double digit percentage adjusted EPS growth ▪ 2017 Focus o Continue integration of recently acquired businesses o Continue to pursue prudent acquisitions o Continue to strengthen operations with select recruits in key markets and in key specialties o Continue to strategically invest in global platform Looking Ahead 12

Appendix

Colliers International 2017 Reconciliation of GAAP earnings to adjusted EBITDA 14 (US$ thousands) Net earnings $ 25,522 $ 23,756 $ 31,029 $ 27,787 Income tax 12,584 12,861 16,242 15,931 Other income, net (807) (1,220) (2,036) (1,820) Interest expense, net 3,279 2,227 6,221 4,591 Operating earnings 40,578 37,624 51,456 46,489 Depreciation and amortization 14,381 10,616 26,408 21,649 Acquisition-related items 3,310 973 7,519 2,045 Restructuring costs 308 2,776 1,040 2,776 Stock-based compensation expense 1,030 806 2,473 2,018 Adjusted EBITDA $ 59,607 $ 52,795 $ 88,896 $ 74,977 Three months ended Six months ended June 30, 2017 June 30, 2016 June 30, 2017 June 30, 2016

Colliers International 2017 Reconciliation of GAAP earnings to adjusted net earnings and adjusted earnings per share 15 (US$ thousands) Net earnings $ 25,522 $ 23,756 $ 31,029 $ 27,787 Non-controlling interest share of earnings (5,003) (5,559) (7,116) (7,973) Amortization of intangible assets 7,915 4,792 13,965 10,428 Acquisition-related items 3,310 973 7,519 2,045 Restructuring costs 308 2,776 1,040 2,776 Stock-based compensation expense 1,030 806 2,473 2,018 Income tax on adjustments (2,456) (2,548) (4,466) (4,239) Non-controlling interest on adjustments (885) (432) (1,729) (934) Adjusted net earnings $ 29,741 $ 24,564 $ 42,715 $ 31,908 (US$) Diluted net earnings per common share $ 0.28 $ 0.55 $ 0.28 $ 0.37 Non-controlling interest redemption increment 0.25 (0.08) 0.33 0.14 Amortization of intangible assets, net of tax 0.13 0.08 0.22 0.17 Acquisition-related items 0.08 0.02 0.18 0.05 Restructuring costs - 0.04 0.02 0.04 Stock-based compensation expense, net of tax 0.02 0.02 0.06 0.05 Adjusted earnings per share $ 0.76 $ 0.63 $ 1.09 $ 0.82 Three months ended Six months ended June 30, 2017 June 30, 2016 June 30, 2017 June 30, 2016 Three months ended Six months ended June 30, 2017 June 30, 2016 June 30, 2017 June 30, 2016