Exhibit 3.1

Composite

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

OF

WILLSCOT MOBILE MINI HOLDINGS CORP., as amended

ARTICLE I

Name

The name of the corporation is WillScot Mobile Mini Holdings Corp. (the “Corporation”).

ARTICLE II

Registered Agent; Registered Office

The address of the Corporation’s registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, City of Wilmington, County of New Castle, Delaware 19801. The name of the Corporation’s registered agent at such address is The Corporation Trust Company.

ARTICLE III

Purposes

The purpose of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Delaware (the “DGCL”).

ARTICLE IV

[Reserved]

ARTICLE V

Capital Stock

1.Authorized Shares.

(a)The total number of shares of all classes of stock that the Corporation is authorized to issue is 501,000,000 shares of stock, consisting of (i) 1,000,000 shares of Preferred Stock, par value $0.0001 per share (“Preferred Stock”) and (ii) 500,000,000 shares of common stock, par value $0.0001 per share (“Common Stock”).

(b)Immediately upon the effectiveness (the “Effective Time”) of this Amended and Restated Certificate of Incorporation (as amended from time to time, the “Certificate of Incorporation”), each share of Class A Common Stock, par value $0.0001 per share (the “Class A Common Stock”) issued and outstanding or held as treasury stock immediately prior to the Effective Time shall, automatically and without the need for any further action, be reclassified as, and shall be converted into, one validly issued, fully paid and nonassessable share of Common Stock. Any stock certificate that immediately prior to the Effective Time represented shares of Class A Common Stock shall from and after the Effective Time be deemed to represent shares of Common Stock into which the shares formerly represented by such certificate have been reclassified and converted, without the need for surrender or exchange thereof.

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2.Preferred Stock. Preferred Stock may be issued from time to time in one or more series pursuant to a resolution or resolutions providing for such issue duly adopted by the Board of Directors of the Corporation (the “Board”) and the filing of a certificate pursuant to the applicable law of the State of Delaware (a “Preferred Designation”), authority to do so being hereby expressly vested in the Board. The Board is further authorized, subject to limitations prescribed by law, to fix by resolution or resolutions the designations, powers, preferences and rights, and the qualifications, limitations or restrictions thereof, of any wholly unissued series of Preferred Stock, including without limitation authority to fix by resolution or resolutions the dividend rights, dividend rate, conversion rights, voting rights, rights and terms of redemption (including sinking fund provisions), redemption price or prices, and liquidation preferences of any such series, and the number of shares constituting any such series and the designation thereof, or any of the foregoing. The powers, preferences and relative, participating, optional and other special rights of each series of Preferred Stock, and the qualifications, limitations or restrictions thereof, if any, may differ from those of any and all other series at any time outstanding. The number of authorized shares of Preferred Stock may be increased or decreased (but not below the number of shares thereof then outstanding) by the affirmative vote of the holders of a majority of the voting power of all of the then-outstanding shares of capital stock of the Corporation entitled to vote thereon, irrespective of the provisions of Section 242(b)(2) of the DGCL, subject to obtaining a vote of the holders of any series of Preferred Stock, if such a vote is required pursuant to the terms of the Certificate of Incorporation (including any Preferred Designation).

3.Common Stock.

(a)Except as otherwise required by law or the Certificate of Incorporation (including any Preferred Designation), the holders of the Common Stock shall possess all voting power with respect to the Corporation. The holders of shares of Common Stock shall be entitled to one vote for each such share on each matter properly submitted to the stockholders on which the holders of the Common Stock are entitled to vote; provided, however, that, except as otherwise required by law, holders of Common Stock shall not be entitled to vote on any amendment to the Certificate of Incorporation (including any Preferred Designation) that relates solely to the terms of one or more outstanding series of Preferred Stock if the holders of such affected series are entitled, either separately or together as a class with the holders of one or more other such series, to vote thereon pursuant to the Certificate of Incorporation (including any Preferred Designation) or pursuant to the Section 242(b)(2) of the DGCL (or any other similar, successor provision thereof).

(b)Except as otherwise required by law or the Certificate of Incorporation (including any Preferred Designation), at any annual or special meeting of the stockholders of the Corporation, the holders of the Common Stock shall have the exclusive right to vote for the election of directors and on all other matters properly submitted to a vote of the stockholders.

(c)Subject to the rights of the holders of any series of Preferred Stock, any action required or permitted to be taken by the stockholders of the Corporation must be effected at a duly called annual or special meeting of stockholders of the Corporation and may not be effected by any consent in writing by such stockholders.

(d)Subject to the rights of the holders of any series of Preferred Stock, special meetings of the stockholders of the Corporation may be called only by the Board, the Chairman of the Board or the Chief Executive Officer of the Corporation.

ARTICLE VI

Bylaws

In furtherance and not in limitation of the powers conferred by statute, the Board shall have the power to adopt, amend, repeal or otherwise alter the bylaws of the Corporation (the “Bylaws”) without any action on the part of the stockholders. The Bylaws may also be amended, supplemented or repealed by the stockholders at an annual or special meeting of the stockholders, the notice for which designates that an amendment, supplement or repeal of one or more of such sections is to be considered, and only by an affirmative vote of the holders of a majority in voting power of the outstanding shares of stock entitled to vote upon such amendment, supplement or repeal, voting as a single class.

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ARTICLE VII

Directors

1.Board of Directors. The business and affairs of the Corporation shall be managed by or under the direction of the Board. In addition to the powers and authority expressly conferred upon them by statute or by the Certificate of Incorporation or the Bylaws, the directors are hereby empowered to exercise all such powers and do all such acts and things as may be exercised or done by the Corporation.

2.Number; Term; Election; Qualification. The number of directors that constitutes the Board shall be fixed from time to time by resolution of the Board in accordance with the Bylaws, and shall consist of not less than three or more than thirteen directors. Each director shall be elected at each annual meeting of stockholders and shall hold office until the following annual meeting of stockholders. The term of each director serving as of and immediately following the date of the 2021 annual meeting of stockholders shall expire at the 2022 annual meeting of stockholders, notwithstanding that such director may have been elected for a term that extended beyond the date of the 2022 annual meeting of stockholders. Each director shall serve until his or her successor is duly elected and qualified or until his or her death, resignation, or removal. If the number of directors is hereafter changed, no decrease in the number of directors constituting the Board shall shorten the term of any incumbent director.

3.Vacancies. Subject to the rights of the holders of any series of Preferred Stock, (x) any vacancies on the Board resulting from death, resignation, disqualification, removal or other causes shall be filled by the affirmative vote of a majority of the remaining directors then in office, even though less than a quorum of the Board and not by the stockholders and (y) newly created directorships resulting from any increase in the number of directors shall be filled by the affirmative vote of the directors then in office, even though less than a quorum of the Board and not by the stockholders. Any director elected in accordance with this Article VII shall hold office (i) in the event of a new directorship created or vacancy occurring prior to the 2024 annual meeting of stockholders, for the remainder of the full term of the class of directors in which the new directorship was created or the vacancy occurred and (ii) in the event of a new directorship created or vacancy occurring after the 2024 annual meeting of stockholders, until the next annual meeting of stockholders and, in each case, until such director’s successor shall have been elected and qualified.

4.Written Ballot. Unless and except to the extent that the Bylaws shall so require, the election of directors of the Corporation need not be by written ballot.

ARTICLE VIII

Limitation of Liability and Indemnification

1.Limitation of Liability. To the fullest extent permitted by the DGCL as it presently exists or may hereafter be amended, a director of the Corporation shall not be personally liable to the Corporation or to its stockholders for monetary damages for any breach of fiduciary duty as a director. No amendment to, modification of, or repeal of this Article VIII, Section 1 shall apply to or have any effect on the liability or alleged liability of any director of the Corporation for or with respect to any acts or omissions of such director occurring prior to such amendment.

2.Indemnification. The Corporation shall, in accordance with this Certificate of Incorporation and the Bylaws, indemnify, advance expenses, and hold harmless, to the fullest extent permitted by applicable law as it presently exists or may hereafter be amended (but in the case of any such amendment, only to the extent that such amendment permits the Corporation), any person (a “Covered Person”) who was or is made or is threatened to be made a party or is otherwise involved in any action, suit or proceeding, whether civil, criminal, administrative or investigative (a “Proceeding”), by reason of the fact that he or she, or a person for whom he or she is the legal representative, is or was a director or officer of the Corporation or, while a director or officer of the Corporation, is or was serving at the request of the Corporation as a director, officer, employee or agent of another corporation or of a partnership, joint venture, trust, enterprise or nonprofit entity, including service with respect to employee benefit plans, against all liability and loss suffered and expenses (including attorneys' fees) reasonably incurred by such Covered Person. Notwithstanding the preceding sentence, except for claims for indemnification (following the final disposition of such Proceeding) or advancement of expenses not paid in full, the Corporation shall be required to indemnify a Covered Person in

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connection with a Proceeding (or part thereof) commenced by such Covered Person only if the commencement of such Proceeding (or part thereof) by the Covered Person was authorized in the specific case by the Board. Any amendment, repeal or modification of this Section 2 shall not adversely affect any right or protection hereunder of any person in respect of any act or omission occurring prior to the time of such repeal or modification.

3.Insurance. The Corporation may maintain insurance, at its expense, to protect itself and any director, officer, employee or agent of the Corporation or another corporation, partnership, joint venture, trust or other enterprise against any such expense, liability or loss, whether or not the Corporation would have the power to indemnify such person against such expense, liability or loss under the DGCL.

ARTICLE IX

Exclusive Jurisdiction for Certain Actions

1.Exclusive Forum. Unless the Board or one of its duly authorized committees otherwise approves in writing, the selection of an alternate forum, the Court of Chancery of the State of Delaware (or, if the Court of Chancery of the State of Delaware does not have jurisdiction, the Superior Court of the State of Delaware, or, if the Superior Court of the State of Delaware also does not have jurisdiction, the United States District Court for the District of Delaware) shall, to the fullest extent permitted by applicable law, be the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Corporation, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer or other employee to the Corporation or the Corporation’s stockholders, (iii) any action asserting a claim against the Corporation arising pursuant to any provision of the DGCL or the Certificate of Incorporation or the Bylaws, (iv) any action to interpret, apply, enforce or determine the validity of the Certificate of Incorporation or the Bylaws or (v) any action asserting a claim against the Corporation governed by the internal affairs doctrine (each, a “Covered Proceeding”).

2.Personal Jurisdiction. If any action the subject matter of which is a Covered Proceeding is filed in a court other than the Court of Chancery of the State of Delaware, or, where permitted in accordance with Section 1 above, the Superior Court of the State of Delaware or the United States District Court for the District of Delaware, (each, a “Foreign Action”) in the name of any person or entity (a “Claiming Party”) without the prior written approval of the Board or one of its duly authorized committees, such Claiming Party shall, to the fullest extent permitted by law, be deemed to have consented to (i) the personal jurisdiction of the Court of Chancery of the State of Delaware, or, where applicable, the Superior Court of the State of Delaware and the United States District Court for the District of Delaware, in connection with any action brought in any such courts to enforce Section 1 above (an “Enforcement Action”) and (ii) having service of process made upon such Claiming Party in any such Enforcement Action by service upon such Claiming Party’s counsel in the Foreign Action as agent for such Claiming Party.

3.Notice and Consent. Any person or entity purchasing or otherwise acquiring or holding any interest in the shares of capital stock of the Corporation shall be deemed to have notice of and consented to the provisions of this Article IX and waived any argument relating to the inconvenience of the forums reference above in connection with any Covered Proceeding.

ARTICLE X

Severability

If any provision or provisions of the Certificate of Incorporation shall be held to be invalid, illegal or unenforceable as applied to any circumstance for any reason whatsoever: (i) the validity, legality and enforceability of such provisions in any other circumstance and of the remaining provisions of the Certificate of Incorporation (including, without limitation, each portion of any section of the Certificate of Incorporation containing any such provision held to be invalid, illegal or unenforceable that is not itself held to be invalid, illegal or unenforceable) shall not in any way be affected or impaired thereby and (ii) to the fullest extent possible, the provisions of the Certificate of Incorporation (including, without limitation, each such portion of any section of the Certificate of Incorporation containing any such provision held to be invalid, illegal or unenforceable) shall be construed so as to permit the Corporation to protect its

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directors, officers, employees and agents from personal liability in respect of their good faith service to or for the benefit of the Corporation to the fullest extent permitted by law.

ARTICLE XI

Corporate Opportunity

The Corporation hereby renounces pursuant to Section 122(17) of the DGCL any interest or expectancy in, or being offered an opportunity to participate in, any business opportunity or classes or categories of business opportunities that are presented to any of the Corporation’s non-employee directors or any of their affiliates (together, an “Identified Person”) which may be a corporate opportunity for such Identified Person and the Corporation or any of its affiliates. In the event that any Identified Person acquires knowledge of a potential transaction or other business opportunity which may be a corporate opportunity for itself, herself or himself and the Corporation or any of its affiliates, such Identified Person shall, to the fullest extent permitted by the DGCL, have no duty to communicate or offer such transaction or other business opportunity to the Corporation or any of its affiliates and, to the fullest extent permitted by the DGCL, shall not be liable to the Company, its affiliates or its stockholders for breach of any fiduciary duty as a stockholder or director of the Company solely by reason of the fact that such Identified Person pursues or acquires such corporate opportunity for itself, herself or himself, or offers or directs such corporate opportunity to another Person or does not present such corporate opportunity to the Corporation or its affiliates. Notwithstanding the foregoing, the Corporation does not renounce its interest or expectancy in any corporate opportunity offered to any Identified Person if such opportunity is expressly offered to such Identified Person solely in his or her capacity as a director of the Corporation, and the foregoing provisions of this Article XI shall not apply to any such corporate opportunity. Notwithstanding anything to contrary herein, the provisions of this Article XI shall have no further force or effect from and after the earlier of such time as (i) TDR Capital LLP (“TDR”) ceases to beneficially own at least 5% of the outstanding shares of Common Stock and (ii) TDR is not entitled to designate one or more members of the Board in accordance with the Shareholders Agreement, by and among the Corporation, TDR and the other parties thereto (as amended from time to time).

ARTICLE XII

Amendment

Except as expressly provided herein, the Corporation reserves the right to amend, alter, change or repeal any provision contained in the Certificate of Incorporation, in the manner now or hereafter prescribed by the laws of the State of Delaware, and all rights conferred upon stockholders herein are granted subject to this reservation.

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