1,164,800Shares GLOBAL WATER RESOURCES, INC. UNDERWRITING AGREEMENT

Exhibit 1.1

EXECUTION VERSION

1,164,800 Shares

GLOBAL WATER RESOURCES, INC.

UNDERWRITING AGREEMENT

April 28, 2016

Roth Capital Partners, LLC

888 San Clemente Drive

Newport Beach, CA 92660

Ladies and Gentlemen:

Global Water Resources, Inc., a Delaware corporation (the “Company”), proposes, subject to the terms and conditions stated in this Underwriting Agreement (the “Agreement”), to issue and sell to Roth Capital Partners, LLC (the “Underwriter”) an aggregate of 1,164,800 authorized but unissued shares (the “Firm Shares”), of the Company’s common stock, par value $0.01 per share (the “Common Stock”). The Company has granted the Underwriter the option to purchase an aggregate of up to 174,720 additional shares of Common Stock (the “Option Shares”) as may be necessary to cover over-allotments made in connection with the offering (the Firm Shares and the Option Shares are herein collectively called the “Underwritten Shares”).

Concurrent with, and as a condition to, the closing of the purchase and sale of the Firm Shares on the Closing Date (as hereafter defined), the Company will complete a series of transactions described in the Pricing Disclosure Package under the heading the “Transactions-Reorganization Transaction”, which include (i) a merger of GWR Global Water Resources Corp., a British Columbia company, (“GWRC”) with and into the Company, with the Company as the surviving corporation (the “Reorganization Transaction”) and (ii) a 100.68-for-one stock split (the “Stock Split”). All share and per share amounts herein are adjusted to reflect the Stock Split.

In the representations and warranties of the Company made as of dates on or after the Closing Date in Section 3(a) hereof, the “Company” shall refer to the Company after completion of the Reorganization Transaction.

The Company and the Underwriter hereby confirm their agreement as follows:

1. Registration Statement and Prospectus. The Company has prepared and filed with the Securities and Exchange Commission (the “Commission”) a registration statement on Form S-1 (File No. 333-209025) under the Securities Act of 1933, as amended (the “Securities Act”) and the rules and regulations (the “Rules and Regulations”) of the Commission thereunder relating to the Underwritten Shares. Such registration statement, as amended at the time it became effective, including the information, if any, deemed pursuant to Rule 430A, 430B or 430C under the Securities Act to be part of the registration statement at the time of its effectiveness (“Rule 430 Information”), is referred to herein as the “Registration Statement”; and as used herein, the term “Preliminary Prospectus” means each prospectus included in Part I of

such registration statement (and any amendments thereto) immediately before effectiveness, any prospectus filed with the Commission pursuant to Rule 424(a) under the Securities Act and the prospectus included in Part I of the Registration Statement at the time of its effectiveness that omits Rule 430 Information, and the term “Prospectus” means the prospectus in the form first used (or made available upon request of purchasers pursuant to Rule 173 under the Securities Act) in connection with confirmation of sales of the Underwritten Shares. If the Company has filed or files an abbreviated registration statement pursuant to Rule 462(b) under the Securities Act (the “Rule 462 Registration Statement”), then any reference herein to the term Registration Statement shall include such Rule 462 Registration Statement. Any “issuer free writing prospectus” as defined in Rule 433 promulgated under the Securities Act relating to the Underwritten Shares is hereinafter called an “Issuer Free Writing Prospectus,” “Section 5(d) Communication” means any oral or written communication with potential investors undertaken in reliance on Section 5(d) of the Securities Act and “Section 5(d) Writing” means any Section 5(d) Communication that is a written communication within the meaning of Rule 405 promulgated under the Securities Act.

At or prior to the Applicable Time (as defined below), the Company had prepared the following information (collectively, the “Pricing Disclosure Package”): a Preliminary Prospectus dated April 13, 2016 and each “free-writing prospectus” (as defined pursuant to Rule 405 under the Securities Act) listed on Schedule I(a) hereto.

“Applicable Time” means 6:00 A.M., Pacific time, on April 28, 2016.

A registration statement on Form 8-A (File No. 001-37756) in respect of the registration of the Common Stock under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), was filed with the Commission on April 26, 2016, and such registration statement, in the form thereof delivered to the Underwriter, was declared effective by the Commission (the “Form 8-A Registration Statement”). No other document with respect to such Form 8-A Registration Statement has theretofore been filed with the Commission.

For purposes of this Agreement, all references to the Registration Statement, the Rule 462 Registration Statement, the Prospectus, the Form 8-A Registration Statement or any amendment or supplement to any of the foregoing shall be deemed to include the copy filed with the Commission pursuant to its Electronic Data Gathering, Analysis and Retrieval system or any successor system (“EDGAR”).

2. Representations and Warranties of the Company Regarding the Offering.

(a) The Company represents and warrants to, and agrees with, the Underwriter, as of the date hereof and as of the Closing Date (as defined in Section 4(c) below), except as otherwise indicated, as follows:

(i) No order preventing or suspending the use of any Preliminary Prospectus or Issuer Free Writing Prospectus has been issued by the Commission, and the Preliminary Prospectus included in the Pricing Disclosure Package, at the time of filing thereof, complied in all material respects with the Securities Act, and the Preliminary Prospectus, at the time of filing thereof, did not contain any untrue statement of a

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material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company makes no representation and warranty with respect to any statements or omissions made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter expressly for use in the Preliminary Prospectus, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 7(f) hereof.

(ii) The Pricing Disclosure Package as of the Applicable Time did not, and as of the Closing Date and as of the Option Closing Date, as the case may be, will not, contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company makes no representation and warranty with respect to any statements or omissions made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter expressly for use in such Pricing Disclosure Package, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 7(f) hereof.

(iii) Each Issuer Free Writing Prospectus and each Section 5(d) Writing listed on Schedule I(b) hereto does not conflict with the information contained in the Registration Statement, the Pricing Disclosure Package or the Prospectus and each such Issuer Free Writing Prospectus and Section 5(d) Writing, as supplemented by and taken together with the Pricing Disclosure Package, as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company makes no representation and warranty with respect to any statements or omissions made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter expressly for use in such Issuer Free Writing Prospectus or Section 5(d) Writing listed on Schedule I(b), it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 7(f) hereof.

(iv) Neither the Company nor GWRC has (A) engaged in or authorized any other person to engage in any Section 5(d) Communications, other than Section 5(d) Communications with the prior consent of the Underwriter with entities that are “qualified institutional buyers” as defined in Rule 144A promulgated under the Securities Act or institutions that are “accredited investors” as defined in Rule 501(a) promulgated under the Securities Act; and (B) distributed, or authorized any other person to distribute, any Section 5(d) Writings, other than those distributed with the prior consent of the Underwriter that are listed on Schedule I(b) hereto and the Company reconfirms that the Underwriter has been authorized to act on its behalf in engaging in Section 5(d) Communications in connection with the offering.

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(v) From January 1, 2015, through the date hereof, and of the initial filing of the Registration Statement by means of EDGAR, the Company has been and is presently, an “Emerging Growth Company” as defined in Section 2(a)(19) of the Securities Act. The Registration Statement (other than any Rule 462 Registration Statement) has been declared effective by the Commission. No order suspending the effectiveness of the Registration Statement has been issued by the Commission, and no proceeding for that purpose or pursuant to Section 8A of the Securities Act against the Company or related to the offering of the Underwritten Shares has been initiated or, to the Company’s knowledge, threatened by the Commission; as of the applicable effective date of the Registration Statement and any post-effective amendment thereto, the Registration Statement and any such post-effective amendment complied and will comply in all material respects with the Securities Act, and did not and will not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary in order to make the statements therein not misleading; and as of the date of the Prospectus and any amendment or supplement thereto and as of the Closing Date and as of the Option Closing Date, as the case may be, the Prospectus will not contain any untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided that the Company makes no representation and warranty with respect to any statements or omissions made in reliance upon and in conformity with information relating to any Underwriter furnished to the Company in writing by such Underwriter expressly for use in the Registration Statement and the Prospectus and any amendment or supplement thereto, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in Section 7(f) hereof.

(vi) The financial statements of the Company, together with the related notes, included in the Registration Statement, the Pricing Disclosure Package and the Prospectus comply in all material respects with the applicable requirements of the Securities Act and the Exchange Act and fairly present the consolidated financial condition of the Company as of the dates indicated and the consolidated results of operations and changes in cash flows for the periods therein specified in conformity with generally accepted accounting principles consistently applied throughout the periods involved; and the supporting schedules included in the Registration Statement present fairly the information required to be stated therein. The pro forma financial statements and the related notes thereto included in the Registration Statement, the Pricing Disclosure Package and the Prospectus present fairly in all material respects the information shown therein, have been prepared in accordance with the Commission’s rules and guidelines with respect to pro forma financial statements and have been properly compiled on the bases described therein, and the assumptions used in the preparation thereof are reasonable and the adjustments used therein are appropriate to give effect to the transactions and circumstances referred to therein. No other financial statements, pro forma financial information or schedules are required under the Securities Act to be included in the Registration Statement, the Pricing Disclosure Package or the Prospectus. To the Company’s knowledge, Deloitte & Touche LLP which has expressed its opinion with respect to certain of the financial statements and schedules filed as a part of the Registration Statement and included in the Registration Statement, the Pricing

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Disclosure Package and the Prospectus, is an independent public accounting firm with respect to the Company within the meaning of the Securities Act and the Rules and Regulations. All disclosures contained in the Registration Statement, the Pricing Disclosure Package or the Prospectus regarding “non-GAAP financial measures” (as such term is defined by the rules and regulations of the Commission) comply with Regulation G under the Exchange Act, and Item 10 of Regulation S-K under the Securities Act, to the extent applicable.

(vii) The Company had a reasonable basis for, and made in good faith, each “forward-looking statement” (within the meaning of Section 27A of the Act or Section 21E of the Exchange Act) contained in the Registration Statement, the Pricing Disclosure Package, or the Prospectus.

(viii) All statistical or market-related data included in the Registration Statement, the Pricing Disclosure Package or the Prospectus, are based on or derived from sources that the Company reasonably believes to be reliable and accurate, and the Company has obtained the written consent to the use of such data from such sources, to the extent required.

(ix) The Common Stock is registered pursuant to Section 12(b) of the Exchange Act pursuant to the Form 8-A Registration Statement and the Underwritten Shares are approved for listing on the Nasdaq Global Market and on the Toronto Stock Exchange, subject to the satisfaction of customary listing conditions.

(x) The Company has not taken, directly or indirectly, any action that is designed to or that has constituted or that would reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Underwritten Shares.

(xi) The Company is not and, after giving effect to the offering and sale of the Underwritten Shares and the application of the net proceeds thereof, will not be an “investment company,” as such term is defined in the Investment Company Act of 1940, as amended.

(xii) The information circular dated March 18, 2016 issued by GWRC with respect to the Reorganization Transaction (the “Information Circular”) complies with the requirements of all applicable laws and regulations of Canada and the provinces and territories thereof, at the date of its issuance and at April 28, 2016 did not contain any “misrepresentation” within the meaning of Canadian provincial securities laws and did not contain any untrue statement of material fact or omit to state a material fact required to be stated therein or necessary in order to make the statement therein, in the light of the circumstances under which they were made, not misleading.

(b) Any certificate signed by any officer of the Company and delivered to the Underwriter or to the Underwriter’s counsel shall be deemed a representation and warranty by the Company to the Underwriter under this Agreement as to the matters covered thereby.

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3. Representations and Warranties Regarding the Company.

(a) The Company represents and warrants to and agrees with the Underwriter, except as set forth in the Registration Statement, the Pricing Disclosure Package and the Prospectus, as follows:

(i) Each of the Company and its subsidiaries and GWRC has been duly organized and is validly existing as a corporation or other business entity in good standing under the laws of its jurisdiction of incorporation or organization. Each of the Company and its subsidiaries and GWRC has the power and authority to own its properties and conduct its business as currently being carried on and as described in the Registration Statement, the Pricing Disclosure Package and the Prospectus, and is duly qualified to do business as a foreign corporation or other business entity in good standing in each jurisdiction in which it owns or leases real property or in which the conduct of its business makes such qualification necessary and in which the failure to so qualify would have or is reasonably likely to result in a material adverse effect upon the business, prospects, properties, operations, condition (financial or otherwise) or results of operations of the Company and its subsidiaries, taken as a whole, or in its ability to perform its obligations under this Agreement (“Material Adverse Effect”).

(ii) The Company has the power and authority to enter into this Agreement and to authorize, issue and sell the Underwritten Shares as contemplated by this Agreement. This Agreement has been duly authorized, executed and delivered by the Company, and constitutes a valid, legal and binding obligation of the Company, enforceable against the Company in accordance with its terms, except as rights to indemnity hereunder may be limited by federal or state securities laws and except as such enforceability may be limited by bankruptcy, insolvency, reorganization or similar laws affecting the rights of creditors generally and subject to general principles of equity. The Company and GWRC have the power and authority to enter into and perform the agreements relating to the Reorganization Transaction and to consummate the transactions provided for therein. Such agreements have been duly authorized, executed and delivered by the Company and GWRC, have been approved by all necessary corporate action of the Company and GWRC, and constitute the legal, valid and binding obligation of each of the Company and GWRC, enforceable against each of the Company and GWRC in accordance with their terms.

(iii) The execution, delivery and performance of this Agreement and the consummation of the transactions herein contemplated and completion of the Reorganization Transaction and the Stock Split will not (A) result in a breach or violation of any of the terms and provisions of, or constitute a default under, any law, rule or regulation to which the Company or any subsidiary or GWRC is subject, or by which any property or asset of the Company or any subsidiary or GWRC is bound or affected, except to the extent that such breach, violation or default is not reasonably likely to result in a Material Adverse Effect, (B) conflict with, result in any violation or breach of, or constitute a default (or an event that with notice or lapse of time or both would become a default) under, or give to others any right of termination, amendment, acceleration or cancellation (with or without notice, lapse of time or both) of, any agreement, lease,

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credit facility, debt, note, bond, mortgage, indenture or other instrument (the “Contracts”), Permit or obligation or other understanding to which the Company or any subsidiary or GWRC is a party of by which any property or asset of the Company or any subsidiary or GWRC is bound or affected, except to the extent that such conflict, default, termination, amendment, acceleration or cancellation right is not reasonably likely to result in a Material Adverse Effect, or (C) result in a breach or violation of any of the terms and provisions of, or constitute a default under, the Company’s or GWRC’s charter or by-laws.

(iv) Neither the Company nor any of its subsidiaries nor GWRC is in violation, breach or default under its charter or by-laws.

(v) All consents, approvals, orders, authorizations and filings required on the part of the Company and its subsidiaries and GWRC in connection with the execution, delivery or performance of this Agreement and the completion of the Reorganization Transaction and the Stock Split have been obtained or made, other than (A) such filing with the State of Delaware and Province of British Columbia under the Delaware General Corporation Law and British Columbia Business Corporations Act of documents necessary to complete the Reorganization disclosed in the Registration Statement, the Pricing Disclosure Package and the Prospectus which are to be obtained at or prior to closing, or (B) such consents, approvals, orders and authorizations the failure of which to make or obtain is not reasonably likely to result in a Material Adverse Effect.

(vi) All of the issued and outstanding shares of capital stock of the Company are duly authorized and validly issued, fully paid and nonassessable, and have been issued in compliance with all applicable securities laws, and conform to the description thereof in the Registration Statement, the Pricing Disclosure Package and the Prospectus. Except for the issuances of options or restricted stock in the ordinary course of business, and other than in respect of the Underwritten Shares, since the respective dates as of which information is provided in the Registration Statement, the Pricing Disclosure Package or the Prospectus, the Company has not entered into or granted any convertible or exchangeable securities, options, warrants, agreements, contracts or other rights in existence to purchase or acquire from the Company any shares of the capital stock of the Company. The Underwritten Shares have been duly authorized and reserved for issuance, and when issued and delivered against payment therefore as provided in this Agreement, will be validly issued and the issuance of the Underwritten Shares will be free of any preemptive rights, rights of first refusal or other similar rights. The shares of Common Stock issuable in the Reorganization Transaction have been duly authorized and reserved for issuance and, upon issuance will be validly issued, fully paid and non-assessable and the issuance of such shares of Common Stock will be free of statutory and contractual preemptive rights, resale rights, rights of first refusal and restrictions upon voting and transfer, other than as a result of any “control share” restrictions, restrictions on holders that are affiliates of the Company, or other restrictions on resale that were applicable (or would have been applicable, had such shares been subject to U.S. securities laws) immediately prior to the Reorganization Transaction. The shares of Common Stock issuable in the Reorganization Transaction are exempt from registration under the Securities Act and from registration or qualification under all applicable state securities

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laws and are being issued in compliance with all applicable Canadian provincial and territorial securities laws. The Common Stock conforms to the description of the capital stock contained in the Pricing Disclosure Package and the Prospectus.

(vii) Each of the Company and its subsidiaries and GWRC has filed all returns (as hereinafter defined) required to be filed with taxing authorities prior to the date hereof or has duly obtained extensions of time for the filing thereof. Each of the Company and its subsidiaries and GWRC has paid all taxes (as hereinafter defined) shown as due on such returns that were filed and has paid all taxes imposed on or assessed against the Company or such respective subsidiary other than (1) as described or reflected in the Registration Statement, or (2) immaterial amounts or those amounts that are being contested in good faith by appropriate proceedings for which reserves have been established on the books and records of the Company or GWRC, as applicable. The provisions for taxes payable, if any, shown on the financial statements filed with or as part of the Registration Statement are sufficient for all accrued and unpaid taxes, whether or not disputed, and for all periods to and including the dates of such consolidated financial statements. Except as disclosed in writing to the Underwriter, (A) no material issues have been raised (and are currently pending) by any taxing authority in connection with any of the returns or taxes asserted as due from the Company or its subsidiaries or GWRC, and (B) no waivers of statutes of limitation with respect to the returns or collection of taxes have been given by or requested from the Company or its subsidiaries or GWRC. The term “taxes” means all federal, state, local, foreign, and other net income, gross income, gross receipts, sales, use, ad valorem, transfer, franchise, profits, license, lease, service, service use, withholding, payroll, employment, excise, severance, stamp, occupation, premium, property, windfall profits, customs, duties or other taxes, fees, assessments, or charges of any kind whatever, together with any interest and any penalties, additions to tax, or additional amounts with respect thereto. The term “returns” means all returns, declarations, reports, statements, and other documents required to be filed in respect to taxes.

(viii) Since the respective dates as of which information is given in the Registration Statement, the Pricing Disclosure Package or the Prospectus, except as disclosed in the Registration Statement, the Pricing Disclosure Package or the Prospectus, (A) none of the Company, any of its subsidiaries or GWRC has incurred any material liabilities or obligations, direct or contingent, or entered into any material transactions other than in the ordinary course of business, (B) neither the Company nor GWRC has declared or paid any dividends or made any distribution of any kind with respect to its capital stock other than monthly dividends in accordance with past practice; (C) there has not been any change in the capital stock of the Company or any of its subsidiaries or GWRC (other than a change in the number of outstanding shares of Common Stock due to the Stock Split or due to the issuance of shares upon the exercise of outstanding options or warrants or the issuance of restricted stock awards or restricted stock under the Company’s existing stock awards plan, or any new grants thereof in the ordinary course of business), (D) there has not been any material change in the Company’s or GWRC’s long-term or short-term debt, and (E) there has not been the occurrence of any Material Adverse Effect.

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(ix) There is not pending or, to the knowledge of the Company, threatened, any action, suit or proceeding to which the Company or any of its subsidiaries or GWRC is a party or of which any property or assets of the Company or its subsidiaries or GWRC is the subject before or by any court or governmental agency, authority or body, or any arbitrator or mediator, which, if resolved adversely to the Company or GWRC is reasonably likely to result in a Material Adverse Effect.

(x) The Company and each of its subsidiaries and GWRC holds, and is in compliance with, all franchises, grants, authorizations, licenses, permits, easements, consents, certificates and orders (“Permits”) of any governmental or self-regulatory agency, authority or body (including, without limitation, of the Arizona Corporation Commission, the Arizona Department of Environmental Quality or any other agency or political subdivision of or municipality within the State of Arizona) required for the conduct of its business, and all such Permits are in full force and effect, in each case except where the failure to hold, or comply with, any such Permit would not, individually or in the aggregate, be reasonably likely to result in a Material Adverse Effect.

(xi) The Company and its subsidiaries and GWRC have good and marketable title to all property (whether real or personal) described in the Registration Statement, the Pricing Disclosure Package and the Prospectus as being owned by them that are material to the Company (including, in the case of GWRC, the shares of Common Stock of the Company described as held by GWRC), in each case free and clear of all liens, claims, security interests, other encumbrances or defects, except those that are not reasonably likely to result in a Material Adverse Effect. The property held under lease by the Company and its subsidiaries is held by them under valid, subsisting and enforceable leases with only such exceptions with respect to any particular lease as do not interfere in any material respect with the conduct of the business of the Company and its subsidiaries.

(xii) The Company and each of its subsidiaries and GWRC owns or possesses or has valid right to use all patents, patent applications, trademarks, service marks, trade names, trademark registrations, service mark registrations, copyrights, licenses, inventions, trade secrets and similar rights (“Intellectual Property”) necessary for the conduct of the business of the Company and its subsidiaries or GWRC as currently carried on and as described in the Registration Statement, the Pricing Disclosure Package and the Prospectus, except where the failure to have such rights would not, individually or in the aggregate, be reasonably likely to result in a Material Adverse Effect. To the knowledge of the Company, no action or use by the Company or any of its subsidiaries will involve or give rise to any infringement of, or license or similar fees for, any Intellectual Property of others, except where such action, use, license or fee is not reasonably likely to result in a Material Adverse Effect. None of the Company, any of its subsidiaries or GWRC has received any written notice alleging any such infringement or fee.

(xiii) The Company and each of its subsidiaries and GWRC has complied with, is not in violation of, and has not received any notice of violation relating to any law, rule or regulation relating to the conduct of its business, or the ownership or

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operation of its property and assets, including, without limitation, (A) the Currency and Foreign Transactions Reporting Act of 1970, as amended, or any money laundering laws, rules or regulations of Canada or any other jurisdiction, (B) any laws, rules or regulations related to health, safety or the environment, including those relating to the regulation of hazardous substances, (C) the Sarbanes-Oxley Act and the rules and regulations of the Commission thereunder, (D) the Foreign Corrupt Practices Act of 1977 and the rules and regulations thereunder, (E) the Employment Retirement Income Security Act of 1974 and the rules and regulations thereunder, and (F) any laws, rules or regulations of Canada, or any province or territory or political subdivision of Canada addressing similar subject matter to any of the foregoing, in each case except where the failure to be in compliance is not reasonably likely to result in a Material Adverse Effect.

(xiv) None of the Company, any of its subsidiaries or GWRC, nor, to the knowledge of the Company, any director, officer, employee, representative, agent or affiliate of the Company or any of its subsidiaries, is currently subject to any U.S. sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”) or any similar sanctions administered by any governmental agency in Canada or elsewhere; and the Company will not directly or indirectly use the proceeds of the offering of the Underwritten Shares contemplated hereby, or lend, contribute or otherwise make available such proceeds to any person or entity, for the purpose of financing the activities of any person currently subject to any U.S. sanctions administered by OFAC or any similar sanctions administered by any governmental agency in Canada or elsewhere.

(xv) The Company and each of its subsidiaries and GWRC carries, or is covered by, insurance in such amounts and covering such risks as is adequate for the conduct of its business and the value of its properties and as is customary for companies engaged in similar businesses in similar industries.

(xvi) No labor dispute with the employees of the Company or any of its subsidiaries, nor GWRC, exists or, to the knowledge of the Company, is imminent that is reasonably likely to result in a Material Adverse Effect.

(xvii) None of the Company, any of its subsidiaries or GWRC, nor, to the knowledge of the Company, any other party thereto is in violation, breach or default of any Contract that is reasonably likely to result in a Material Adverse Effect.

(xviii) No supplier, customer, distributor or sales agent of the Company has notified the Company that it intends to discontinue or decrease the rate of business done with the Company, except where such decrease is not reasonably likely to result in a Material Adverse Effect.

(xix) To the Company’s knowledge, there are no claims, payments, issuances, arrangements or understandings for services in the nature of a finder’s, consulting or origination fee with respect to the introduction of the Company to the Underwriter or the sale of the Underwritten Shares hereunder or any other arrangements,

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agreements, understandings, payments or issuances with respect to the Company or GWRC that may affect the Underwriter’s compensation, as determined by FINRA.

(xx) Except as disclosed to the Underwriter in writing, neither the Company nor GWRC has made any direct or indirect payments (in cash, securities or otherwise) to (A) any person, as a finder’s fee, investing fee or otherwise, in consideration of such person raising capital for the Company or GWRC or introducing to the Company or GWRC persons who provided capital to the Company or GWRC, (B) any FINRA member, or (C) any person or entity that has any direct or indirect affiliation or association with any FINRA member within the 12-month period prior to the date on which the Registration Statement was filed with the Commission (“Filing Date”) or thereafter.

(xxi) None of the net proceeds of the offering will be paid by the Company to any participating FINRA member or any affiliate or associate of any participating FINRA member, except as specifically authorized herein.

(xxii) To the Company’s knowledge, no (A) officer or director of the Company or its subsidiaries, (B) owner of 5% or more of the Company’s unregistered securities or that of its subsidiaries or (C) owner of any amount of the Company’s unregistered securities acquired within the 180-day period prior to the Filing Date, has any direct or indirect affiliation or association with any FINRA member. The Company will advise the Underwriter and its counsel if it becomes aware that any officer, director or stockholder of the Company or its subsidiaries is or becomes an affiliate or associated person of a FINRA member participating in the offering.

(xxiii) Other than the Underwriter, no person has the right to act as an underwriter or as a financial advisor to the Company in connection with the transactions contemplated hereby.

(xxiv) At the time of filing the Registration Statement and any post-effective amendment thereto, at the earliest time thereafter that the Company or any offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) under the Securities Act) of the Underwritten Shares and at the date hereof, the Company was not and is not an “ineligible issuer,” as defined in Rule 405 under the Securities Act or an “excluded issuer” as defined in Rule 164 under the Securities Act. The Company has paid the registration fee for this offering pursuant to Rule 456(b)(1) under the Securities Act or will pay such fee within the time period required by such rule (without giving effect to the proviso therein) and in any event prior to the Closing Date.

(xxv) Neither the Company nor GWRC has sold, issued or distributed any shares of Common Stock or securities of GWRC during the six-month period preceding the date hereof, including any sales pursuant to Rule 144A under, or Regulation D or Regulation S of, the Securities Act, other than (A) shares of Common Stock issued pursuant to employee benefit plans, qualified stock option plans or other employee compensation plans or pursuant to outstanding convertible securities, options,

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rights or warrants, and (B) shares of Common Stock issuable in the Reorganization Transaction.

4. Purchase, Sale and Delivery of Underwritten Shares.

(a) On the basis of the representations, warranties and agreements herein contained, but subject to the terms and conditions herein set forth, the Company agrees to issue and sell the Firm Shares to the Underwriter, and the Underwriter agrees to purchase the Firm Shares. The purchase price for each Firm Share shall be US$5.8125 per Share (the “Per Share Price”).

(b) The Company hereby grants to the Underwriter the option to purchase some or all of the Option Shares and, upon the basis of the warranties and representations and subject to the terms and conditions herein set forth, the Underwriter shall have the right to purchase all or any portion of the Option Shares at the Per Share Price as may be necessary to cover over-allotments made in connection with the transactions contemplated hereby. This option may be exercised by the Underwriter at any time (but not more than once) on or before the thirtieth day following the date hereof, by written notice to the Company (the “Option Notice”). The Option Notice shall set forth the aggregate number of Option Shares as to which the option is being exercised, and the date and time when the Option Shares are to be delivered (such date and time being herein referred to as the “Option Closing Date”); provided, however, that the Option Closing Date shall not be earlier than the Closing Date (as defined below) nor earlier than the first business day after the date on which the option shall have been exercised nor later than the fifth business day after the date on which the option shall have been exercised unless the Company and the Underwriter otherwise agree.

Payment of the purchase price for and delivery of the Option Shares shall be made at the Option Closing Date in the same manner and at the same office as the payment for the Firm Shares as set forth in subparagraph (c) below, including with regard to the conditions set forth in Section 6 below. For the purpose of expediting the checking of the certificate for the Option Shares by the Underwriter, the Company agrees to make a form of such certificate available to the Underwriter for such purpose at least one full business day preceding the Option Closing Date.

(c) The Firm Shares will be delivered by the Company to the Underwriter against payment of the purchase price therefor by wire transfer of same day funds payable to the order of the Company at the offices of Roth Capital Partners, LLC, 888 San Clemente Drive, Newport Beach, CA 92660, or such other location as may be mutually acceptable, at 6:00 a.m. PST, on the third (or if the Firm Shares are priced, as contemplated by Rule 15c6-1(c) under the Exchange Act, after 4:30 p.m. Eastern time, the fourth) full business day following the date hereof, or at such other time and date as the Underwriter and the Company determine pursuant to Rule 15c6-1(a) under the Exchange Act, or, in the case of the Option Shares, at such date and time set forth in the Option Notice. The time and date of delivery of the Firm Shares or the Option Shares, as applicable, is referred to herein as the “Closing Date.” If the Underwriter so elects, delivery of the Firm Shares and Option Shares may be made by credit through full fast transfer to the account at The Depository Trust Company designated by the Underwriter. Certificates representing the Underwritten Shares, in definitive form and in such denominations

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and registered in such names as the Underwriter may request upon at least two business days’ prior notice to the Company, will be made available for checking and packaging not later than 10:30 a.m. PDT on the business day next preceding the Closing Date at the above addresses, or such other location as may be mutually acceptable.

5. Covenants.

(a) The Company covenants and agrees with the Underwriter as follows:

(i) During the period beginning on the date hereof and ending on the later of the Closing Date or such date as, in the opinion of counsel for the Underwriter, the Prospectus is no longer required by law to be delivered in connection with sales by an underwriter or dealer (the “Prospectus Delivery Period”), prior to amending or supplementing the Registration Statement, including any Rule 462 Registration Statement, the Pricing Disclosure Package or the Prospectus, the Company shall furnish to the Underwriter for review and comment a copy of each such proposed amendment or supplement, and the Company shall not file any such proposed amendment or supplement to which the Underwriter reasonably objects.

(ii) From the date of this Agreement until the end of the Prospectus Delivery Period, the Company shall promptly advise the Underwriter in writing (A) of the receipt of any comments of, or requests for additional or supplemental information from, the Commission, the British Columbia Securities Commission, the Ontario Securities Commission or any other securities regulatory authority or the Nasdaq Global Market or the Toronto Stock Exchange, (B) of the time and date of any filing of any post-effective amendment to the Registration Statement or any amendment or supplement to the Pricing Disclosure Package or the Prospectus or any Issuer Free Writing Prospectus, (C) of the time and date that any post-effective amendment to the Registration Statement becomes effective and (D) of the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement or of any order preventing or suspending its use or the use of the Pricing Disclosure Package or any Issuer Free Writing Prospectus, or of any proceedings to remove, suspend or terminate from listing or quotation the Common Stock from any securities exchange upon which it is listed for trading or included or designated for quotation, or of the threatening or initiation of any proceedings for any of such purposes. If the Commission shall enter any such stop order at any time during the Prospectus Delivery Period, the Company will use its reasonable efforts to obtain the lifting of such order at the earliest possible moment. Additionally, the Company agrees that it shall comply with the provisions of Rules 424(b), 430A and 430B, as applicable, under the Securities Act and will use its reasonable efforts to confirm that any filings made by the Company under Rule 424(b) or Rule 433 were received in a timely manner by the Commission (without reliance on Rule 424(b)(8) or 164(b) of the Securities Act).

(iii) During the Prospectus Delivery Period, the Company will comply with all requirements imposed upon it by the Securities Act, as now and hereafter amended, and by the Rules and Regulations, as from time to time in force, and by the Exchange Act, as now and hereafter amended, so far as necessary to permit the

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continuance of sales of or dealings in the Underwritten Shares as contemplated by the provisions hereof, the Pricing Disclosure Package, the Registration Statement and the Prospectus. If during such period any event occurs as a result of which the Prospectus (or if the Prospectus is not yet available to prospective purchasers, the Pricing Disclosure Package) would include an untrue statement of a material fact or omit to state a material fact necessary to make the statements therein, in the light of the circumstances then existing, not misleading, or if during such period it is necessary or appropriate in the opinion of the Company or its counsel or the Underwriter or its counsel to amend the Registration Statement or supplement the Prospectus (or if the Prospectus is not yet available to prospective purchasers, the Pricing Disclosure Package ) to comply with the Securities Act, the Company will promptly notify the Underwriter, allow the Underwriter the opportunity to provide reasonable comments on such amendment, Prospectus supplement or document, and will amend the Registration Statement or supplement the Prospectus (or if the Prospectus is not yet available to prospective purchasers, the Pricing Disclosure Package) so as to correct such statement or omission or effect such compliance.

(iv) If at any time following the issuance of an Issuer Free Writing Prospectus or Section 5(d) Writing there occurs an event or development as a result of which such Issuer Free Writing Prospectus or Section 5(d) Writing would conflict with the information contained in the Registration Statement or any Prospectus or would include an untrue statement of a material fact or would omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances prevailing at that subsequent time, not misleading, the Company promptly will notify the Underwriter and will promptly amend or supplement, at its own expense, such Issuer Free Writing Prospectus or Section 5(d) Writing to eliminate or correct such conflict, untrue statement or omission.

(v) The Company shall take or cause to be taken all necessary action to qualify the Underwritten Shares for sale under the securities laws of such jurisdictions as the Underwriter reasonably designates and to continue such qualifications in effect so long as required for the distribution of the Underwritten Shares, except that the Company shall not be required in connection therewith to qualify as a foreign corporation or as a dealer in securities in any jurisdiction in which it is not so qualified, to file a prospectus or any offering document in any jurisdiction (other than the Registration Statement and Prospectus), to execute a general consent to service of process in any state or to subject itself to taxation in respect of doing business in any jurisdiction in which it is not otherwise subject.

(vi) The Company will furnish to the Underwriter and counsel for the Underwriter copies of the Registration Statement, each Prospectus, any Issuer Free Writing Prospectus or Draft Registration Statement, and all amendments and supplements to such documents, in each case as soon as available and in such quantities as the Underwriter may from time to time reasonably request.

(vii) The Company will make generally available to its security holders as soon as practicable, but in any event not later than 15 months after the end of the

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Company’s current fiscal quarter, an earnings statement (which need not be audited) covering a 12-month period that shall satisfy the provisions of Section 11(a) of the Securities Act and Rule 158 of the Rules and Regulations.

(viii) The Company, whether or not the transactions contemplated hereunder are consummated or this Agreement is terminated, will pay or cause to be paid (A) all expenses (including transfer taxes allocated to the respective transferees) incurred in connection with the delivery to the Underwriter of the Underwritten Shares, (B) all expenses and fees (including, without limitation, fees and expenses of the Company’s counsel) incurred by the Company in connection with the preparation, printing, filing, delivery, and shipping of the Registration Statement (including the financial statements therein and all amendments, schedules, and exhibits thereto), the Underwritten Shares, the Pricing Disclosure Package, the Prospectus, any Issuer Free Writing Prospectus and any amendment thereof or supplement thereto, (C) all reasonable filing fees and reasonable fees and disbursements of the Underwriter’s counsel incurred in connection with the qualification of the Underwritten Shares for offering and sale by the Underwriter or by dealers under the securities or blue sky laws of the states and other jurisdictions that the Underwriter shall designate, (D) the fees and expenses of any transfer agent or registrar, (E) the reasonable filing fees and reasonable fees and disbursements of Underwriter’s counsel incident to any required review and approval by FINRA of the terms of the sale of the Underwritten Shares, (F) listing fees, if any, and (G) all other costs and expenses incident to the performance of its obligations hereunder that are not otherwise specifically provided for herein. In addition to the foregoing, the Company will reimburse the Underwriter for its reasonable, documented out-of-pocket expenses incurred in connection with the purchase and sale of the Underwritten Shares contemplated hereby not exceeding US$25,000 (the “Underwriter’s Expenses”). If this Agreement is terminated by the Underwriter in accordance with the provisions of Section 6 or Section 9, the Company will reimburse the Underwriter for all reasonable, documented out-of-pocket disbursements (including, but not limited to, reasonable fees and disbursements of counsel, travel expenses, postage, facsimile and telephone charges) incurred by the Underwriter in connection with its investigation, preparing to market and marketing of the Shares or in contemplation of performing its obligations hereunder. Notwithstanding the foregoing, the maximum amount payable by the Company for fees and disbursements of the Underwriter’s counsel pursuant to this Section 5(a)(viii) exclusive of the Underwriter’s Expenses shall be US$150,000, exclusive of any indemnity obligations that the Company may have.

(ix) The Company intends to apply the net proceeds from the sale of the Shares to be sold by it hereunder for the purposes set forth in the Pricing Disclosure Package and in the Prospectus.

(x) The Company has not taken and will not take, directly or indirectly, during the Prospectus Delivery Period, any action designed to or which might reasonably be expected to cause or result in, or that has constituted, the stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares.

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(xi) The Company represents and agrees that, unless it obtains the prior written consent of the Underwriter, and the Underwriter represents and agrees that, unless it obtains the prior written consent of the Company, it has not made and will not make any offer relating to the Underwritten Shares that would constitute an Issuer Free Writing Prospectus; provided that the prior written consent of the parties hereto shall be deemed to have been given in respect of the free writing prospectuses included in Schedule I(a). The Company has complied and will comply with the requirements of Rule 433 under the Securities Act applicable to any Issuer Free Writing Prospectus, including timely filing with the Commission or retention where required and legending; and the Company represents that it has satisfied and agrees that it will satisfy the conditions under Rule 433 under the Act to avoid a requirement to file with the Commission any electronic road show.

(xii) The Company hereby agrees that, without the prior written consent of the Underwriter, it will not, during the period ending 180 days after the date hereof (“Lock-Up Period”), (A) offer, pledge, issue, sell, contract to sell, purchase, contract to purchase, lend, or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock; (B) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Common Stock, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of Common Stock or such other securities, in cash or otherwise; or (C) file any registration statement with the Commission relating to the offering of any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock. The restrictions contained in the preceding sentence shall not apply to (1) the Underwritten Shares to be sold hereunder, (2) the issuance of Common Stock upon the exercise of options or warrants disclosed as outstanding in the Registration Statement (excluding exhibits thereto) or the Prospectus, (3) the issuance of employee stock options not exercisable during the Lock-Up Period and the grant of restricted stock awards or settlement in cash of restricted stock units pursuant to equity incentive plans described in the Registration Statement (excluding exhibits thereto) and the Prospectus, or (4) issue common stock or warrants to purchase common stock in connection with mergers, acquisitions of securities, businesses, property or other assets, joint ventures, strategic alliances, equipment leasing arrangements or debt financing. Notwithstanding the foregoing, if the Company ceases to be an “Emerging Growth Company” at any time prior to the expiration of the Lock-Up Period and if (x) the Company issues an earnings release or material news, or a material event relating to the Company occurs, during the last 17 days of the Lock-Up Period, or (y) prior to the expiration of the Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the Lock-Up Period, the restrictions imposed by this clause shall continue to apply until the expiration of the 18-day period beginning on the issuance of the earnings release or the occurrence of the material news or material event, unless the Underwriter waives such extension in writing.

(xiii) If the Company elects to rely upon Rule 462(b), the Company shall file a Rule 462 Registration Statement with the Commission in compliance with Rule 462(b) by 6:00 A.M., Pacific time, on April 28, 2016, and the Company shall at the time

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of filing either pay to the Commission the filing fee for the Rule 462 Registration Statement or give irrevocable instructions for the payment of such fee pursuant to Rule 111(b) under the Securities Act.

(xiv) The Company agrees to promptly notify the Underwriter if the Company ceases to be an “Emerging Growth Company” at any time prior to the later of (A) the completion of the 180-day restricted period referred to in Section 5(a)(xii) hereof and (B) the completion of the distribution of the Underwritten Shares within the meaning of the Securities Act; provided, however, that the Company shall be under no obligation to provide such notification after the completion of the 180-day restricted period unless the Underwriter has previously notified the Company that it is still undertaking such distribution as of the completion of this restricted period.

6. Conditions of the Underwriter’s Obligations. The obligations of the Underwriter hereunder to purchase the Underwritten Shares are subject to the accuracy, as of the date hereof and at the Closing Date (as if made at the Closing Date), of and compliance with all representations, warranties and agreements of the Company contained herein, the performance by the Company of its obligations hereunder and the following additional conditions:

(a) If the filing of the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, is required under the Securities Act or the Rules and Regulations, the Company shall have filed the Prospectus (or such amendment or supplement) or such Issuer Free Writing Prospectus with the Commission in the manner and within the time period so required (without reliance on Rule 424(b)(8) or 164(b) promulgated under the Securities Act); the Registration Statement shall remain effective; no stop order suspending the effectiveness of the Registration Statement or any part thereof, any Rule 462 Registration Statement, or any amendment thereof, nor suspending or preventing the use of the Pricing Disclosure Package or the Prospectus or any Issuer Free Writing Prospectus shall have been issued; no proceedings for the issuance of such an order shall have been initiated or threatened; and any request of the Commission or the Underwriter for additional information (to be included in the Registration Statement, the Pricing Disclosure Package, the Prospectus, any Issuer Free Writing Prospectus or otherwise) shall have been complied with to the Underwriter’s satisfaction.

(b) The Common Stock and the Underwritten Shares shall be qualified and approved for listing on the NASDAQ Global Market and the Toronto Stock Exchange, subject to the satisfaction of customary listing conditions.

(c) FINRA shall have raised no objection to the fairness and reasonableness of the underwriting terms and arrangements.

(d) The Underwriter shall not have reasonably determined, and advised the Company, that the Registration Statement, the Pricing Disclosure Package or the Prospectus, or any amendment thereof or supplement thereto, or any Issuer Free Writing Prospectus or Section 5(d) Writing, contains an untrue statement of fact which, in the Underwriter’s reasonable opinion, is material, or omits to state a fact which, in the Underwriter’s reasonable opinion, is material and is required to be stated therein or necessary to make the statements therein not

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misleading and the Company shall not have promptly taken such action as is necessary to cure such untrue statement of material fact or material omission of fact.

(e) On or after the date hereof (i) no downgrading shall have occurred in the rating accorded any of the Company’s securities by any “nationally recognized statistical organization,” as that term is defined by the Commission for purposes of Rule 436(g)(2) under the Securities Act, and (ii) no such organization shall have publicly announced that it has under surveillance or review, with possible negative implications, its rating of any of the Company’s securities.

(f) On the Closing Date, there shall have been furnished to the Underwriter the opinion letters of Snell & Wilmer L.L.P., dated the Closing Date and addressed to the Underwriter, in form and substance as set forth in Schedule II(a) hereto.

(g) On the Closing Date, there shall have been furnished to the Underwriter the opinion letters of Canadian counsel to the Company, dated the Closing Date and addressed to the Underwriter, in form and substance as set forth in Schedule II(b) and Schedule II(c) hereto.

(h) The Underwriter shall have received on and as of the Closing Date an opinion of Dorsey & Whitney LLP, counsel for the Underwriter, with respect to such matters as the Underwriter may reasonably request, and such counsel shall have received such documents and information as they may reasonably request to enable them to pass upon such matters.

(i) The Underwriter shall have received a letter of Deloitte & Touche LLP, on the date hereof and on the Closing Date addressed to the Underwriter, in a form acceptable to the Underwriter, confirming that they are independent public accountants within the meaning of the Securities Act and are in compliance with the applicable requirements relating to the qualifications of accountants under Rule 2-01 of Regulation S-X of the Commission, and confirming, as of the date of each such letter (or, with respect to matters involving changes or developments since the respective dates as of which specified financial information is given in the Pricing Disclosure Package, as of a date not prior to the date hereof or more than five days prior to the date of such letter), the conclusions and findings of said firm with respect to the financial information and other matters required by the Underwriter.

(j) On the Closing Date, there shall have been furnished to the Underwriter a certificate, dated the Closing Date and addressed to the Underwriter, signed by the chief executive officer and the chief financial officer of the Company, in their capacity as officers of the Company, to the effect that:

(i) The representations and warranties of the Company in this Agreement that are qualified by materiality or by reference to any Material Adverse Effect are true and correct in all respects, and all other representations and warranties of the Company in this Agreement are true and correct, in all material respects, as if made at and as of the Closing Date, and the Company has complied in all material respects with all the agreements and satisfied all the conditions on its part to be performed or satisfied at or prior to the Closing Date;

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(ii) No stop order or other order (A) suspending the effectiveness of the Registration Statement or any part thereof or any amendment thereof, (B) suspending the qualification of the Underwritten Shares for offering or sale, or (C) suspending or preventing the use of the Pricing Disclosure Package, the Prospectus or any Issuer Free Writing Prospectus, has been issued, and no proceeding for that purpose has been instituted or, to their knowledge, is contemplated by the Commission or any state or regulatory body; and

(iii) There has been no occurrence of any event resulting or reasonably likely to result in a Material Adverse Effect during the period from and after the date of this Agreement and prior to the Closing Date.

(k) On or before the date hereof, the Underwriter shall have received duly executed “lock-up” agreements, in a form attached hereto as Schedule III, between the Underwriter and each party named on Schedule IV.

(l) The Stock Split shall be effective and the Reorganization Transaction shall have closed, the merger that is a part of the Reorganization Transaction shall have been completed, and the Common Stock issuable pursuant to the Reorganization Transaction shall have been issued, in each case substantially as described in the Registration Statement, the Pricing Disclosure Package, the Prospectus and the Information Circular, and the Underwriter shall have received evidence to such effect in form and substance satisfactory to the Underwriter and its counsel.

(m) The Company shall have furnished to the Underwriter and its counsel such additional documents, certificates and evidence as the Underwriter or its counsel may have reasonably requested.

If any condition specified in this Section 6 shall not have been fulfilled when and as required to be fulfilled, this Agreement may be terminated by the Underwriter by notice to the Company at any time at or prior to the Closing Date and such termination shall be without liability of any party to any other party, except that Section 5(a)(viii), Section 7 and Section 8 shall survive any such termination and remain in full force and effect.

7. Indemnification and Contribution.

(a) The Company agrees to indemnify, defend and hold harmless the Underwriter, its affiliates, directors and officers and employees, and each person, if any, who controls the Underwriter within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, from and against any losses, claims, damages or liabilities to which the Underwriter or such person may become subject, under the Securities Act or otherwise (including in settlement of any litigation if such settlement is effected with the written consent of the Company), insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon (i) an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, including the information deemed to be a part of the Registration Statement at the time of effectiveness and at any subsequent time pursuant to Rules 430A and 430B of the Rules and Regulations, or arise out of or are based upon the omission

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from the Registration Statement, or alleged omission to state therein, a material fact required to be stated therein or necessary to make the statements therein not misleading, (ii) an untrue statement or alleged untrue statement of a material fact contained in the Pricing Disclosure Package, the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, any Section 5(d) Writing or the Information Circular or any communication with respect to the Reorganization Transaction, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, any Preliminary Prospectus, the Prospectus, or the Pricing Disclosure Package, or any such amendment or supplement thereto, any Issuer Free Writing Prospectus or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, any Section 5(d) Writing or the Information Circular or any communication with respect to the Reorganization Transaction, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading, (iii) in whole or in part, any inaccuracy in the representations and warranties of the Company contained herein, or (iv) in whole or in part, any failure of the Company or GWRC to perform its obligations hereunder or under law, and will reimburse the Underwriter for any legal or other expenses reasonably incurred by it in connection with evaluating, investigating or defending against such loss, claim, damage, liability or action; provided, however, that the Company shall not be liable in any such case to the extent that any such loss, claim, damage, liability or action arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, the Pricing Disclosure Package, the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, or any Section 5(d) Writing, in reliance upon and in conformity with written information furnished to the Company by the Underwriter specifically for use in the preparation thereof, which written information is described in Section 7(f), other than losses, claims, damages or liabilities (or expenses relating thereto) that are finally judicially determined to have resulted from the bad faith or gross negligence of the Underwriter.

(b) The Underwriter will indemnify, defend and hold harmless the Company, its affiliates, directors, officers and employees, and each person, if any, who controls the Company within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act, from and against any losses, claims, damages or liabilities to which the Company may become subject, under the Securities Act or otherwise (including in settlement of any litigation, if such settlement is effected with the written consent of such Underwriter), insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, the Pricing Disclosure Package, the Prospectus, or any amendment or supplement thereto any Issuer Free Writing Prospectus or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, or any Section 5(d) Writing, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged

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omission was made in the Registration Statement, the Pricing Disclosure Package, the Prospectus, or any amendment or supplement thereto any Issuer Free Writing Prospectus or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, or any Section 5(d) Writing, in reliance upon and in conformity with written information furnished to the Company by the Underwriter specifically for use in the preparation thereof, which written information is described in Section 7(f), and will reimburse the Company for any legal or other expenses reasonably incurred by the Company in connection with defending against any such loss, claim, damage, liability or action.

(c) Promptly after receipt by an indemnified party under subsection (a) or (b) above of notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under such subsection, notify the indemnifying party in writing of the commencement thereof; but the failure to notify the indemnifying party shall not relieve the indemnifying party from any liability that it may have to any indemnified party except to the extent such indemnifying party has been materially prejudiced by such failure. In case any such action shall be brought against any indemnified party, it shall notify the indemnifying party of the commencement thereof, and the indemnifying party shall be entitled to participate in, and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel satisfactory to such indemnified party, and after notice from the indemnifying party to such indemnified party of the indemnifying party’s election so to assume the defense thereof, the indemnifying party shall not be liable to such indemnified party under such subsection for any legal or other expenses subsequently incurred by such indemnified party in connection with the defense thereof; provided, however, that if (i) the indemnified party has reasonably concluded (based on advice of counsel) that there may be legal defenses available to it or other indemnified parties that are different from or in addition to those available to the indemnifying party, (ii) a conflict or potential conflict exists (based on advice of counsel to the indemnified party) between the indemnified party and the indemnifying party (in which case the indemnifying party will not have the right to direct the defense of such action on behalf of the indemnified party), or (iii) the indemnifying party has not in fact employed counsel reasonably satisfactory to the indemnified party to assume the defense of such action within a reasonable time after receiving notice of the commencement of the action, the indemnified party shall have the right to employ a single counsel to represent it in any claim in respect of which indemnity may be sought under subsection (a) or (b) of this Section 7, in which event the reasonable fees and expenses of such separate counsel shall be borne by the indemnifying party or parties and reimbursed to the indemnified party as incurred.

The indemnifying party under this Section 7 shall not be liable for any settlement of any proceeding effected without its written consent, but if settled with such consent or if there be a final judgment for the plaintiff, the indemnifying party agrees to indemnify the indemnified party against any loss, claim, damage, liability or expense by reason of such settlement or judgment. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement, compromise or consent to the entry of judgment in any pending or threatened action, suit or proceeding in respect of which any indemnified party is a party or could be named and indemnity was or would be sought hereunder by such indemnified party, unless such settlement, compromise or consent (a) includes an unconditional release of such indemnified party from all liability for claims that are the subject matter of such action, suit or

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proceeding and (b) does not include a statement as to or an admission of fault, culpability or a failure to act by or on behalf of any indemnified party.

(d) If the indemnification provided for in this Section 7 is unavailable or insufficient to hold harmless an indemnified party under subsection (a) or (b) above, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of the losses, claims, damages or liabilities referred to in subsection (a) or (b) above, (i) in such proportion as is appropriate to reflect the relative benefits received by the Company on the one hand and the Underwriter on the other from the offering and sale of the Underwritten Shares or (ii) if the allocation provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company on the one hand and the Underwriter on the other in connection with the statements or omissions that resulted in such losses, claims, damages or liabilities, as well as any other relevant equitable considerations. The relative benefits received by the Company on the one hand and the Underwriter on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Company bear to the total underwriting discounts and commissions received by the Underwriter, in each case as set forth in the table on the cover page of the Prospectus. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company or the Underwriter and the parties’ relevant intent, knowledge, access to information and opportunity to correct or prevent such untrue statement or omission. The Company and the Underwriter agree that it would not be just and equitable if contributions pursuant to this subsection (d) were to be determined by pro rata allocation or by any other method of allocation that does not take account of the equitable considerations referred to in the first sentence of this subsection (d). The amount paid by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the first sentence of this subsection (d) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending against any action or claim that is the subject of this subsection (d). Notwithstanding the provisions of this subsection (d), the Underwriter shall not be required to contribute any amount in excess of the amount of the Underwriter’s discounts and commissions referenced in Section 4(a) actually received by the Underwriter pursuant to this Agreement. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation.

(e) The obligations of the Company under this Section 7 shall be in addition to any liability that the Company may otherwise have and the benefits of such obligations shall extend, upon the same terms and conditions, to each person, if any, who controls the Underwriter within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act; and the obligations of the Underwriter under this Section 7 shall be in addition to any liability that the Underwriter may otherwise have and the benefits of such obligations shall extend, upon the same terms and conditions, to the Company, and officers, directors and each person who controls the Company within the meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act.

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(f) For purposes of this Agreement, the Underwriter confirms, and the Company acknowledges, that there is no information concerning the Underwriter furnished in writing to the Company by the Underwriter specifically for preparation of or inclusion in the Registration Statement, the Pricing Disclosure Package, the Prospectus, any Issuer Free Writing Prospectus or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Act, or any Section 5(d) Writing, other than the statements set forth in the last paragraph on the cover page of the Prospectus and the statements set forth in the “Underwriting” section of the Prospectus and Pricing Disclosure Package, only insofar as such statements relate to the amount of selling concession and re-allowance or to over-allotment and related activities that may be undertaken by the Underwriter.

8. Representations and Agreements to Survive Delivery. All representations, warranties, and agreements of the Company herein or in certificates delivered pursuant hereto, including, but not limited to, the agreements of the Underwriter and the Company contained in Section 5(a)(viii) and Section 7 hereof, shall remain operative and in full force and effect regardless of any investigation made by or on behalf of the Underwriter or any controlling person thereof, or the Company or any of its officers, directors, or controlling persons, and shall survive delivery of, and payment for, the Shares to and by the Underwriter hereunder.

9. Termination of this Agreement.

(a) The Underwriter shall have the right to terminate this Agreement by giving notice to the Company as hereinafter specified at any time at or prior to the Closing Date, if in the discretion of the Underwriter, (i) there has occurred any material adverse change in the securities markets or any event, act or occurrence that has materially disrupted, or in the opinion of the Underwriter, will in the future materially disrupt, the securities markets or there shall be such a material adverse change in general financial, political or economic conditions or the effect of international conditions on the financial markets in the United States as to make it, in the judgment of the Underwriter, inadvisable or impracticable to market the Underwritten Shares or enforce contracts for the sale of the Underwritten Shares (ii) trading in the Company’s Common Stock shall have been suspended by the Commission or the Nasdaq Global Market, or by Canadian securities regulatory authorities or the Toronto Stock Exchange or trading in securities generally on the Nasdaq Global Market, New York Stock Exchange, NYSE Amex or the Toronto Stock Exchange shall have been suspended, (iii) minimum or maximum prices for trading shall have been fixed, or maximum ranges for prices for securities shall have been required, on the Nasdaq Global Market, New York Stock Exchange or the Toronto Stock Exchange, by such exchange or by order of the Commission or any other governmental authority having jurisdiction, (iv) a banking moratorium shall have been declared by federal or state authorities, (v) there shall have occurred any attack on or outbreak or escalation of hostilities or act of terrorism involving the United States resulting in any declaration by the United States of a national emergency or war, any substantial change or development involving a prospective substantial change in United States or international political, financial or economic conditions or any other calamity or crisis, or (vi) the Company suffers any loss by strike, fire, flood, earthquake, accident or other calamity, whether or not covered by insurance, or (vii) in the judgment of the Underwriter, there has been, since the time of execution of this Agreement or since the respective dates as of which information is given in the Prospectus, any material adverse change in the assets, properties, condition, financial or otherwise, or in the results of

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operations, business affairs or business prospects of the Company and its subsidiaries considered as a whole, whether or not arising in the ordinary course of business. Any such termination shall be without liability of any party to any other party except that the provisions of Section 5(a)(viii) and Section 7 hereof shall at all times be effective and shall survive such termination.

(b) If the Underwriter elects to terminate this Agreement as provided in this Section, the Company shall be notified promptly by the Underwriter by telephone, confirmed by letter.

10. Notices. Except as otherwise provided herein, all communications hereunder shall be in writing and, (a) if to Roth, shall be mailed, delivered or telecopied to Roth Capital Partners, LLC, 888 San Clemente Drive, Newport Beach, CA 92660, telecopy number: (949)  ###-###-####, Attention: Managing Director; and (b) if to the Company, shall be (i) mailed, delivered or telecopied to Global Water Resources, Inc., 21410 North 19th Avenue, Suite 201, Phoenix, AZ 85027, telecopy number: (623)  ###-###-####, Attention: Ron L. Fleming, President and CEO, and (ii) copied to Snell & Wilmer L.L.P., One Arizona Center, Phoenix, AZ 85004, telecopy number: (602)  ###-###-####), Attention: Michael M. Donahey (it being understood that delivery of such copy shall not constitute notice to the Company hereunder); or in each case to such other address as the person to be notified may have requested in writing. Any party to this Agreement may change such address for notices by sending to the parties to this Agreement written notice of a new address for such purpose.

11. Persons Entitled to Benefit of Agreement. This Agreement shall inure to the benefit of and be binding upon the parties hereto and their respective successors and assigns and the controlling persons, officers and directors referred to in Section 7. Nothing in this Agreement is intended or shall be construed to give to any other person, firm or corporation any legal or equitable remedy or claim under or in respect of this Agreement or any provision herein contained. The term “successors and assigns” as herein used shall not include any purchaser, as such purchaser, of any of the Underwritten Shares from the Underwriter.

12. Absence of Fiduciary Relationship. The Company acknowledges and agrees that: (a) the Underwriter has been retained solely to act as underwriter in connection with the sale of the Shares and that no fiduciary, advisory or agency relationship between the Company and the Underwriter has been created in respect of any of the transactions contemplated by this Agreement, irrespective of whether the Underwriter has advised or is advising the Company on other matters; (b) the price and other terms of the Shares set forth in this Agreement were established by the Company following discussions and arms-length negotiations with the Underwriter and the Company is capable of evaluating and understanding and understands and accepts the terms, risks and conditions of the transactions contemplated by this Agreement; (c) it has been advised that the Underwriter and its affiliates are engaged in a broad range of transactions that may involve interests that differ from those of the Company and that the Underwriter has no obligation to disclose such interest and transactions to the Company by virtue of any fiduciary, advisory or agency relationship; (d) it has been advised that the Underwriter is acting, in respect of the transactions contemplated by this Agreement, solely for the benefit of the Underwriter, and not on behalf of the Company.

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13. Amendments and Waivers. No supplement, modification or waiver of this Agreement shall be binding unless executed in writing by the party to be bound thereby. The failure of a party to exercise any right or remedy shall not be deemed or constitute a waiver of such right or remedy in the future. No waiver of any of the provisions of this Agreement shall be deemed or shall constitute a waiver of any other provision hereof (regardless of whether similar), nor shall any such waiver be deemed or constitute a continuing waiver unless otherwise expressly provided.

14. Partial Unenforceability. The invalidity or unenforceability of any section, paragraph, clause or provision of this Agreement shall not affect the validity or enforceability of any other section, paragraph, clause or provision.

15. Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of California.

16. Submission to Jurisdiction. The Company irrevocably (a) submits to the jurisdiction of any court of the State of California for the purpose of any suit, action, or other proceeding arising out of this Agreement, or any of the agreements or transactions contemplated by this Agreement, the Registration Statement and the Prospectus (each a “Proceeding”), (b) agrees that all claims in respect of any Proceeding may be heard and determined in any such court, (c) waives, to the fullest extent permitted by law, any immunity from jurisdiction of any such court or from any legal process therein, (d) agrees not to commence any Proceeding other than in such courts, and (e) waives, to the fullest extent permitted by law, any claim that such Proceeding is brought in an inconvenient forum. THE COMPANY (ON BEHALF OF ITSELF AND, TO THE FULLEST EXTENT PERMITTED BY LAW, ON BEHALF OF ITS RESPECTIVE EQUITY HOLDERS AND CREDITORS) HEREBY WAIVES ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY CLAIM BASED UPON, ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT AND THE TRANSACTIONS CONTEMPLATED BY THIS AGREEMENT, THE REGISTRATION STATEMENT, AND THE PROSPECTUS.

17. Counterparts. This Agreement may be executed in one or more counterparts and, if executed in more than one counterpart, the executed counterparts shall each be deemed to be an original and all such counterparts shall together constitute one and the same instrument.

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Please sign and return to the Company the enclosed duplicates of this letter whereupon this letter will become a binding agreement between the Company and the Underwriter in accordance with its terms.

[Signature page to Underwriting Agreement]

SCHEDULE I

(a) FREE WRITING PROSPECTUSES INCLUDED IN THE PRICING DISCLOSURE PACKAGE

FREE WRITING PROSPECTUS

Filed Pursuant to Rule 433

Relating to Preliminary Prospectus dated April 13, 2016

Registration Statement No. 333-209025

Dated April 27, 2016

FREE WRITING PROSPECTUS

Filed Pursuant to Rule 433

Relating to Preliminary Prospectus dated April 13, 2016

Registration Statement No. 333-209025

Dated April 28, 2016

GLOBAL WATER RESOURCES, INC.

1,164,800 Shares

Schedule I-1

The issuer has filed a registration statement (including a preliminary prospectus dated April 13, 2016) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the issuer has filed with the SEC for more complete information about the issuer and this offering.

You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, the issuer, any underwriter or any dealer participating in the offering will arrange to send you the preliminary prospectus if you request it from Roth Capital Partners, LLC, Attention: Syndicate Department, 888 San Clemente Drive, Newport Beach, CA 92660, by telephone at 1-800-678-9147, by e-mail to ***@***, by fax to (949) 720-7227. You may also access the most recent preliminary prospectus dated April 13, 2016 included in Amendment No. 2 to the registration statement via the following link: https://www.sec.gov/Archives/edgar/data/1434728/000119312516539865/d82352ds1a.htm

This communication should be read in conjunction with the preliminary prospectus.

ANY DISCLAIMERS OR OTHER NOTICES THAT MAY APPEAR BELOW ARE NOT APPLICABLE TO THIS COMMUNICATION AND SHOULD BE DISREGARDED. SUCH DISCLAIMERS OR OTHER NOTICES WERE AUTOMATICALLY GENERATED AS A RESULT OF THIS COMMUNICATION BEING SENT VIA BLOOMBERG OR ANOTHER EMAIL SYSTEM.

None.

Schedule I-2