UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 40-F

[]
REGISTRATION STATEMENT PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

OR

[X] ANNUAL REPORT PURSUANT TO SECTION 13(a) OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2015

Commission File Number: 001-32562

STANTEC
INC.



(Exact name of Registrant as specified in its charter)





(Translation of
Registrants name into English (if applicable))

Canada



(Province or
other jurisdiction of incorporation or organization)

8711



(Primary Standard
Industrial Classification Code Number (if applicable))

N/A



(I.R.S. Employer
Identification Number (if applicable))

10160  112 Street, Edmonton, Alberta, Canada T5K 2L6



(Address and
telephone number of Registrants principal executive offices)

Stantec Consulting Services Inc., 19 Technology Drive, Irvine, CA
92618-2334 (949) 923-6000



(Name, address (including zip code) and telephone number (including area code) of agent for service in the United States)

Securities registered or to be registered pursuant to Section 12(b) of the Act.

| |  |                     |  |  |  |                                          
| |  | ------------------- |  |  |  | -----------------------------------------
| |  | Title of each class |  |  |  | Name of each exchange on which registered
| |  |                     | 
| |  | Common Shares       |  |  |  | New York Stock Exchange                  



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Securities registered or to be registered pursuant to Section 12(g) of the Act.

None.



(Title of Class)

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act.

None.



(Title of Class)

For annual reports, indicate by check mark the information filed with this Form:

[Ö] Annual information form    [Ö]
Audited annual financial statements

Indicate the number of outstanding shares of each of the issuers classes of capital or common stock as of the
close of the period covered by the annual report.

As of December 31, 2015  94,435,898 Common Shares outstanding.

Indicate by check mark whether the Registrant by filing the information contained in this Form is also thereby furnishing the information to the Commission
pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934 (the Exchange Act). If Yes is marked, indicate the file number assigned to the Registrant in connection with such Rule.

Yes []    No [Ö]

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding
12 months (or for such shorter period that the Registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

Yes [Ö]    No []

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required
to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the Registrant was required to submit and post such files).

Yes []    No []



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DISCLOSURE CONTROLS AND PROCEDURES

The disclosure provided under Controls and Procedures on page M-71 and M-72 of Exhibit 2, Managements Discussion and Analysis, is
incorporated by reference herein.

MANAGEMENTS ANNUAL REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

The disclosure provided under Management Report on page F-1 of Exhibit 3, 2015 Audited Consolidated Financial Statements, is incorporated by
reference herein.

AUDITOR ATTESTATION

The disclosure provided under Independent Auditors Report on Internal Control Over Financial Reporting on page F-3 of Exhibit 3, 2015 Audited
Consolidated Financial Statements, is incorporated by reference herein.

CHANGES IN INTERNAL CONTROL OVER FINANCIAL REPORTING

The disclosure provided under Controls and Procedures on page M-71 and M-72 of Exhibit 2, Managements Discussion and Analysis, is
incorporated by reference herein.

IDENTIFICATION OF THE AUDIT COMMITTEE

On December 31, 2015, Stantecs audit and risk committee was made up of the following four members: Ivor M. Ruste (Chair), David L. Emerson, Delores M.
Etter, and Douglas K. Ammerman.

AUDIT COMMITTEE FINANCIAL EXPERT

Stantecs Board of Directors has determined that it has three audit committee financial experts serving on its audit and risk committee. Ivor M. Ruste,
David L. Emerson, and Douglas K. Ammerman are each an audit committee financial expert (as such term is defined in the rules and regulations of the Securities Exchange Commission) and are independent, as that term is defined by the New York Stock
Exchanges corporate governance standards applicable to Stantec. The Securities and Exchange Commission has indicated that the designation of a person as an audit committee financial expert does not impose on such person any duties, obligations
or liability that are greater than those imposed on such person as a member of the audit committee and the Board of Directors in the absence of such designation and does not affect the duties, obligations or liability of any other member of the
audit committee or Board of Directors.

CODE OF ETHICS

Stantec has adopted a code of ethics, entitled Stantec Code of Ethics. The Code of Ethics applies to all directors, officers and employees of
Stantec, including Stantecs principal executive officer, principal financial officer and principal accounting officer. Stantec requires that all officers and employees annually certify that they have read and understand the Code. The Code of
Ethics is reviewed at least annually to ensure that it complies with all legal requirements and is in alignment with best practices. In the event that amendments are needed, recommendations are made to the corporate governance and compensation
committee and the Board of Directors for approval. The Code of Ethics is available on Stantecs website (www.stantec.com) under the Learn About Us  Corporate Governance section.

The Board of Directors believes that providing a forum for employees and officers to raise concerns about ethical conduct and treating all complaints with the
appropriate level of seriousness foster a culture of ethical conduct within Stantec. Stantecs Integrity Policy sets out our procedures for reporting and investigating observations or concerns raised by employees or officers of the company. The
Integrity Policy is available at www.stantec.com. Stantec monitors compliance with its code through its external integrity hotline. The external integrity hotline allows officers or employees to report concerns regarding breaches of our code in
writing, over the telephone, by mail or by email. All complaints



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are treated as confidential, and requests to maintain anonymity are respected to the extent possible. The integrity hotline is managed by an independent third party.

Copies of all complaints are reviewed by the chair of the Audit and Risk Committee upon receipt. A quarterly report is presented to the Audit and Risk
Committee summarizing the status of any active investigations of complaints and the resolution of all complaints made through the integrity hotline.

The
Board of Directors believes that its effectiveness is furthered when directors exercise independent judgment in considering transactions and agreements. As such, if at any Board of Directors meeting a director or executive officer has a
material interest in a matter being considered, such director or officer would not be present for discussions relating to the matter and would not participate in any vote on the matter.

PRINCIPAL ACCOUNTANT FEES AND SERVICES

The disclosure provided under External Auditor Service Fees on page 20 of Exhibit 1, Annual Information Form, is incorporated by reference herein.

AUDIT COMMITTEE PRE-APPROVAL POLICIES AND PROCEDURES

The disclosure provided under Preapproval Policy on page 20 of Exhibit 1, Annual Information Form, is incorporated by reference herein. No
audit-related fees, tax fees or other fees were approved by the Audit and Risk Committee pursuant to paragraph (c)(7)(i)(C) of Regulation S-X.

OFF-BALANCE SHEET ARRANGEMENTS

The
disclosure provided under Off-Balance Sheet Arrangements on page M-50 of Exhibit 2, Managements Discussion and Analysis, is incorporated by reference herein.

CONTRACTUAL OBLIGATIONS

The disclosure
provided under Contractual Obligations on page M-49 and M-50 of Exhibit 2, Managements Discussion and Analysis, is incorporated by reference herein.

CORPORATE GOVERNANCE

The disclosure
provided under NYSE Corporate Governance Disclosure on page 22 of Exhibit 1, Annual Information Form, is incorporated by reference herein.

UNDERTAKING AND CONSENT TO SERVICE OF PROCESS



|A. | Undertaking
|-- | -----------

Stantec undertakes to make available, in person or by telephone, representatives to respond
to inquiries made by the Commission staff, and to furnish promptly, when requested to do so by the Commission staff, information relating to the securities registered pursuant to Form 40-F, the securities in relation to which the obligation to file
an annual report on Form 40-F arises, or transactions in said securities.



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B.        Consent to Service of Process

Stantec has previously filed with the Commission a Form F-X in connection with the Common Shares.

SIGNATURES

Pursuant to the requirements
of the Exchange Act, the registrant certifies that it meets all of the requirements for filing on Form 40-F and has duly caused this annual report to be signed on its behalf by the undersigned, thereto duly authorized.



| |  |                                      
| |  | -------------------------------------
| |  | STANTEC INC.                         
| | 
| |  | /s/ Robert J.
Gomes                  
| |  | Robert J. Gomes, P. Eng.             
| |  | President and Chief Executive Officer

Date: February 24, 2016



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EXHIBIT INDEX







|            |  |                                                                                                                                                      
|----------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------
|Exhibit No. |  | Description                                                                                                                                          
|            | 
|99.1.       |  | Annual Information Form dated February 24, 2016                                                                                                      
|            | 
|99.2.       |  | Managements Discussion and Analysis for the year ended December 31, 2015 (pages M-1 through M-75 of the 2015 Annual Report)                         
|            | 
|99.3.       |  | 2015 Audited Consolidated Financial Statements (pages F-1 through F-52 of the 2015 Annual Report)                                                    
|            | 
|99.4.       |  | Consent of Ernst & Young LLP                                                                                                                         
|            | 
|99.5.       |  | Chief Executive Officers Certifications required by Rule 13a-14(a) or Rule 15d-14(a), pursuant to Section 302 of the U.S. Sarbanes-Oxley Act of 2002
|            | 
|99.6.       |  | Chief Executive Officers Certification pursuant to 18 U.S.C. Section 1350, as enacted pursuant to Section 906 of the U.S. Sarbanes-Oxley Act of 2002
|            | 
|99.7.       |  | Chief Financial Officers Certifications required by Rule 13a-14(a) or Rule 15d-14(a), pursuant to Section 302 of the U.S. Sarbanes-Oxley Act of 2002
|            | 
|99.8.       |  | Chief Financial Officers Certification pursuant to 18 U.S.C. Section 1350, as enacted pursuant to Section 906 of the U.S. Sarbanes-Oxley Act of 2002



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