Exhibit 3.1

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

OF

UNUM GROUP

The present name of the corporation is Unum Group. The corporation was incorporated under the name “Provident Companies, Inc.” by the filing of its original certificate of incorporation with the Secretary of State of the State of Delaware on March 22, 1995. This Amended and Restated Certificate of Incorporation of the corporation restates and integrates and further amends the provisions of the corporation’s restated certificate of incorporation as heretofore amended (the “Existing Certificate of Incorporation”). This Amended and Restated Certificate of Incorporation was duly adopted in accordance with the provisions of Sections 242 and 245 of the General Corporation Law of the State of Delaware. The Existing Certificate of Incorporation is hereby amended and restated to read in its entirety as follows:

FIRST: The name of the corporation is Unum Group (the “Corporation”).

SECOND: The address of the registered office of the Corporation in the state of Delaware is 2711 Centerville Road, Suite 400, in the city of Wilmington, county of New Castle. The name of the Corporation’s registered agent at that address is Corporation Service Company.

THIRD: The purpose of the Corporation is to engage in any lawful act or activity for which a corporation may be organized under the General Corporation Law of Delaware as set forth in Title 8 of the Delaware Code (the “GCL”).

FOURTH: A. The total number of shares of capital stock which the Corporation shall have authority to issue is 750,000,000 shares, consisting of 725,000,000 shares of Common Stock par value $.10 per share (the “Common Stock”) and 25,000,000 shares of Preferred Stock, par value $.10 per share (the “Preferred Stock”).

B. Shares of Preferred Stock may be issued from time to time in one or more classes or series as may be determined from time to time by the Board of Directors of the Corporation (the “Board of Directors”), each such class or series to be distinctly designated. Except in respect of the particulars fixed by the Board of Directors for classes or series provided for by the Board of Directors as permitted hereby, all shares of Preferred Stock shall be of equal rank and shall be identical. All shares of any one series of Preferred Stock so designated by the Board of Directors shall be alike in every particular, except that shares of any one series issued at different times may differ as to the dates from which dividends thereon shall be cumulative. The voting rights, if any, of each such class or series and the preferences and relative, participating, optional and other special rights of each such class or series and the qualifications, limitations and restrictions thereof, if any, may differ from those of any and all other classes or series at any time outstanding; and the Board of Directors of the Corporation is hereby expressly granted authority to fix, by resolutions duly adopted prior to the issuance of any shares of a particular class or series of Preferred Stock so designated by the Board of Directors, the voting powers of stock of such class or series, if any, and the designations, preferences and relative, participating, optional or other special rights and the

qualifications, limitations and restrictions of such class or series, including, but without limiting the generality of the foregoing, the following:

(1) The distinctive designation of, and the number of shares of Preferred Stock which shall constitute, such class or series, and such number may be increased (except where otherwise provided by the Board of Directors) or decreased (but not below the number of shares thereof then outstanding) from time to time by like action of the Board of Directors;

(2) The rate and time at which, and the terms and conditions upon which, dividends, if any, on Preferred Stock of such class or series shall be paid, the extent of the preference or relation, if any, of such dividends to the dividends payable on any other class or classes, or series of the same or other classes of stock and whether such dividends shall be cumulative or non-cumulative;

(3) The right, if any, of the holders of Preferred Stock of such class or series to convert the same into, or exchange the same for, shares of any other class or classes or of any series of the same or any other class or classes of stock and the terms and conditions of such conversion or exchange;

(4) Whether or not Preferred Stock of such class or series shall be subject to redemption, and the redemption price or prices and the time or times at which, and the terms and conditions upon which, Preferred Stock of such class or series may be redeemed;

(5) The rights, if any, of the holders of Preferred Stock of such class or series upon the voluntary or involuntary liquidation of the Corporation;

(6) The terms of the sinking fund or redemption or purchase account, if any, to be provided for the Preferred Stock of such class or series; and

(7) The voting powers, if any, of the holders of such class or series of Preferred Stock.

C. Except as otherwise provided in this Certificate of Incorporation, the Board of Directors shall have authority to authorize the issuance, from time to time without any vote or other action by the stockholders, of any or all shares of stock of the Corporation of any class or series at any time authorized, and any securities convertible into or exchangeable for any such shares, and any options, rights or warrants to purchase or acquire any such shares, in each case to such persons and on such terms (including as a dividend or distribution on or with respect to, or in connection with a split or combination of, the outstanding shares of stock of the same or any other class) as the Board of Directors from time to time in its discretion lawfully may determine; provided, however, that the consideration for the issuance of shares of stock of the Corporation having par value (unless issued as such a dividend or distribution or in connection with such a split or combination) shall not be less than such par value. Shares so issued shall be fully paid stock, and the holders of such stock shall not be liable to any further call or assessments thereon.

D. Except as provided in this Certificate of Incorporation, each holder of Common Stock shall be entitled to one vote for each share of Common Stock held by such holder.

FIFTH: A. The business and affairs of the Corporation shall be managed by or under the direction of the Board of Directors.

B. The Board of Directors shall consist of not less than three nor more than fifteen directors. The exact number of directors shall be determined from time to time by resolution

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adopted by the affirmative vote of a majority of the Board of Directors, subject to Article III, Section 11 of the By-Laws of the Corporation.

C. Subject to the rights of the holders of any Preferred Stock to elect directors:

(1) Until the election of directors at the 2016 annual meeting of stockholders (each annual meeting of stockholders, an “Annual Meeting”), the Board of Directors shall be divided into three classes of directors, designated as Class I, Class II and Class III, each of which shall consist, as nearly as possible, of one-third of the total number of directors constituting the entire Board of Directors. Subject to Sections C(2), C(3) and D of this Article FIFTH, each class of directors shall be elected for a three-year term, and the terms of each class shall be staggered so that only one class of directors will be elected at each Annual Meeting.

(2) At each Annual Meeting commencing with the 2014 Annual Meeting, successors to the class of directors whose terms expire at that Annual Meeting shall be elected for a one-year term.

(3) From and after the election of directors at the 2016 Annual Meeting, the Board of Directors shall cease to be classified.

D. If prior to the 2016 Annual Meeting the number of directors is increased in accordance with the terms of this Certificate of Incorporation or the By-Laws, then, except to the extent that an increase in the authorized number of directors occurs in connection with the rights of the holders of Preferred Stock to elect additional directors, any newly created directorship resulting from such increase shall be apportioned among the classes so as to maintain the number of directors in each class as nearly equal as possible, and any additional director elected to fill such newly created directorship shall hold office for a term that shall coincide with the remaining term of the class of directors into which such director was elected. From and after the 2016 Annual Meeting, any additional director elected to fill a newly created directorship resulting from an increase in the number of directors shall hold office for a term expiring at the next Annual Meeting. In no case will a decrease in the number of directors shorten the term of any incumbent director.

E. A director shall hold office until the Annual Meeting for the year in which his or her term expires and until his or her successor shall be elected and shall qualify, subject, however, to the director’s prior death, resignation, disqualification or removal from office.

F. The stockholders shall have the right to remove any or all of the directors at any time, but only by the affirmative vote of the holders of eighty percent (80%) of the votes entitled to be cast by the holders of all outstanding shares of Voting Stock (as hereinafter defined) voting together as a single class; provided, however, that until the 2016 Annual Meeting, directors may be removed only for cause.

G. Any vacancy on the Board of Directors that results from a newly created directorship or for any other reason shall be filled only by the affirmative vote of a majority of the Board of Directors then in office, although less than a quorum, or by a sole remaining director, and may not be filled by any other person or persons. Any director elected to fill a vacancy not resulting from an increase in the number of directors shall have the same remaining term as that of his or her predecessor.

H. Notwithstanding the foregoing, whenever the holders of any one or more classes or series of Preferred Stock issued by the Corporation shall have the right, voting separately by class or series, to elect directors at an annual or special meeting of stockholders, the election, term of office, filling of vacancies and other features of such directorships shall be governed by the terms of this Certificate of Incorporation applicable thereto (including the

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resolutions adopted by the Board of Directors pursuant to Section B of Article FOURTH), and such directors so elected shall not be divided into classes pursuant to Section C of this Article FIFTH unless expressly provided by such terms. Election of directors need not be by written ballot unless the By-Laws so provide.

I. The Board of Directors may from time to time determine whether, to what extent, at what times and places and under what conditions and regulations the accounts, books and papers of the Corporation, or any of them, shall be open to the inspection of the stockholders, and no stockholder shall have any right to inspect any account, book or document of the Corporation, except as and to the extent expressly provided by law with reference to the right of stockholders to examine the original or duplicate stock ledger, or otherwise expressly provided by law, or except as expressly authorized by resolution of the Board of Directors.

J. In addition to the powers and authority hereinbefore or by statute expressly conferred upon them, 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, subject, nevertheless, to the provisions of the statutes of Delaware, this Certificate of Incorporation, and the By-Laws.

K. Except as may be otherwise determined by the Board of Directors in fixing the terms of any class or series of Preferred Stock pursuant to Article FOURTH hereof, no action shall be taken by stockholders of the Corporation except at an annual or special meeting of stockholders of the Corporation and the right of stockholders to act by written consent in lieu of a meeting is specifically denied.

SIXTH: A. The Board of Directors shall have concurrent power with the stockholders as set forth in this Certificate of Incorporation to make, alter, amend, change, add to or repeal the By-Laws of the Corporation.

B. Subject to Article III, Section 11 of the By-Laws, the Board of Directors may amend the By-Laws of the Corporation upon the affirmative vote of the number of directors which shall constitute, under the terms of the By-Laws, the action of the Board of Directors. Stockholders may not amend the By-Laws of the Corporation except upon the affirmative vote of at least eighty percent (80%) of the votes entitled to be cast by the holders of all outstanding shares of Voting Stock voting together as a single class.

SEVENTH: A. In addition to any affirmative vote required by law, this Certificate of Incorporation, the By-Laws of the Corporation or otherwise, except as otherwise expressly provided in Section B of this Article SEVENTH, the Corporation shall not engage, directly or indirectly, in any Business Combination (as hereinafter defined) with an Interested Stockholder (as hereinafter defined) without the affirmative vote of (i) not less than eighty percent (80%) of the votes entitled to be cast by the holders of all outstanding shares of Voting Stock voting together as a single class, and (ii) not less than a majority of the votes entitled to be cast by the holders of all outstanding shares of Voting Stock which are beneficially owned by persons other than such Interested Stockholder voting together as a single class. Such affirmative vote shall be required notwithstanding the fact that no vote may be required, or that a lesser percentage or separate class vote may be specified, by law or in any agreement with any national securities exchange or otherwise.

B. The provisions of Section A of this Article SEVENTH shall not be applicable to any particular Business Combination, and such Business Combination shall require only such affirmative vote, if any, as is required by law, this Certificate of Incorporation, the By-Laws or the Corporation, or otherwise, if such Business Combination shall have been approved by a majority (whether such approval is made prior to or subsequent to the acquisition of beneficial

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ownership of Voting Stock that caused the Interested Stockholder to become an Interested Stockholder) of the Continuing Directors (as hereinafter defined).

C. For the purposes of this Certificate of Incorporation:

(1) The term “Business Combination” shall mean:

(a) any merger or consolidation of this Corporation or any Subsidiary (as hereinafter defined) with (i) any Interested Stockholder or (ii) any other corporation (whether or not itself an Interested Stockholder) which is or after such merger or consolidation would be an Affiliate or Associate of an Interested Stockholder; or

(b) any sale, lease, exchange, mortgage, pledge, transfer or other disposition (in one transaction or a series of transactions) between the Corporation or any Subsidiary and any Interested Stockholder or any Affiliate or Associate of any Interested Stockholder involving any assets or securities of the Corporation, any Subsidiary or any Interested Stockholder or any Affiliate or Associate of any Interested Stockholder the value of which would constitute, immediately prior to such transaction, a Substantial Part (as hereinafter defined) of the assets of the Corporation; or

(c) the adoption of any plan or proposal for the liquidation or dissolution of, or similar transaction involving, the Corporation proposed by or on behalf of an Interested Stockholder or any Affiliate or Associate of any Interested Stockholder; or

(d) any reclassification of securities (including any reverse stock split), or recapitalization of the Corporation, or any merger or consolidation of the Corporation with any of its Subsidiaries or any other transaction (whether or not with or otherwise involving an Interested Stockholder) that has the effect, directly or indirectly, of increasing the proportionate share of any class or series of Capital Stock, or any securities convertible into Capital Stock or into equity securities of any Subsidiary, that is beneficially owned by any Interested Stockholder or any Affiliate or Associate of any Interested Stockholder; or

(e) any agreement, contract or other arrangement providing for any one or more of the actions specified in the foregoing clauses (a) to (d).

(2) The term “Capital Stock” shall mean all capital stock of the Corporation authorized to be issued from time to time under Article FOURTH of this Certificate of Incorporation, and the term “Voting Stock” shall mean all Capital Stock which by its terms may be voted on all matters submitted to stockholders of the Corporation generally.

(3) The term “person” shall mean any individual, firm, corporation or other entity and shall include any group comprised of any person and any other person with whom such person or any Affiliate or Associate of such person has any agreement, arrangement or understanding, directly or indirectly, for the purpose of acquiring, holding, voting or disposing of Capital Stock.

(4) The term “Interested Stockholder” shall mean any person (other than the Corporation or any Subsidiary and other than any profit-sharing, employee stock ownership or other employee benefit plan of the Corporation or any Subsidiary or any trustee of or fiduciary with respect to any such plan or any trust or any other entity formed for the purposes of holding Voting Stock for the purpose of funding any such

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plan or funding other employee benefits for employees of the Corporation or any Subsidiary, in each case when acting in such capacity) who (a) is the beneficial owner of Voting Stock representing fifteen percent (15%) or more of the votes entitled to be cast by the holders of all then outstanding shares of Voting Stock; or (b) is an Affiliate or Associate of the Corporation and at any time within the two-year period immediately prior to the date in question was the beneficial owner of Voting Stock representing fifteen percent (15%) or more of the votes entitled to be cast by the holders of all then outstanding share of Voting Stock.

(5) A person shall be a “beneficial owner” of any Capital Stock (a) which such person or any of its Affiliates or Associates beneficially owns, directly or indirectly; (b) which such person or any of its Affiliates or Associates has, directly or indirectly, (i) the right to acquire (whether such right is exercisable immediately or subject only to the passage of time), pursuant to any agreement, arrangement or understanding or upon the exercise of conversion rights, exchange rights, warrants or options, or otherwise, or (ii) the right to vote pursuant to any agreement, arrangement or understanding; or (c) which are beneficially owned, directly or indirectly, by any other person with which such person or any of its Affiliates or Associates has any agreement, arrangement or understanding for the purpose of acquiring, holding, voting or disposing of any shares of Capital Stock. For the purposes of determining whether a person is an Interested Stockholder pursuant to Paragraph 4 of this Section C, the number of shares of Capital Stock deemed to be outstanding shall include shares deemed beneficially owned by such person through application of Paragraph 5 of this Section C, but shall not include any other shares of Capital Stock that may be issuable pursuant to any agreement, arrangement or understanding, or upon exercise of conversion rights, warrants or options, or otherwise.

(6) The terms “Affiliate” and “Associate” shall have the respective meanings ascribed to such terms in Rule 12b-2 under the Securities Exchange Act of 1934, as amended (the “Act”), (the term “registrant” in Rule 12b-2 meaning in this case the Corporation).

(7) The term “Subsidiary” means any corporation of which a majority of any class of equity security is beneficially owned by the Corporation; provided, however, that for the purposes of the definition of Interested Stockholder set forth in Paragraph 4 of this Section C, the term “Subsidiary” shall mean only a corporation of which a majority of each class of equity security is beneficially owned by the Corporation.

(8) The term “Continuing Director” means any member of the Board of Directors, while such person is a member of the Board of Directors, who is not an Affiliate or Associate or representative of the Interested Stockholder and was a member of the Board of Directors prior to the time that the Interested Stockholder became an Interested Stockholder, and any successor of a Continuing Director, while such successor is a member of the Board of Directors, who is not an Affiliate or Associate or representative of the Interested Stockholder and is recommended or elected to succeed the Continuing Director by a majority of Continuing Directors. In order for a Business Combination or other action to be approved, or a fact or other matter to be determined, “by a majority of the Continuing Directors” hereunder, there must be one or more Continuing Directors then serving on the Board of Directors.

(9) The term “Substantial Part” means assets having an aggregate Fair Market Value (as hereinafter defined) in excess of ten percent (10%) of the book value of the total consolidated assets of the Corporation and its Subsidiaries as of the end of the Corporation’s most recent fiscal year ending prior to the time the stockholders of

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the Corporation would be required to approve or authorize the Business Combination involving assets constituting any such Substantial Part.

(10) The term “Fair Market Value” means (a) in the case of cash, the amount of such cash; (b) in the case of stock, the highest closing sale price, during the 30-day period immediately preceding the date in question, of a share of such stock on the Composite Tape for New York Stock Exchange, Inc. Listed Stocks, or, if such stock is not quoted on the Composite Tape, on the New York Stock Exchange, Inc., or , if such stock is not listed on such exchange, on the principal United States securities exchange registered under the Act on which such stock is listed, or if such stock is not listed on any such exchange, the highest closing bid quotation with respect to a share of such stock, during the 30-day period preceding the date in question, on the National Association of Securities Dealers, Inc. Automated Quotation System or any similar system then in use, or if no such quotations are available, the fair market value on the date in question of a share of such stock as determined by a majority of the Continuing Directors in good faith; and (c) in the case of property other than cash or stock, the fair market value of such property on the date in question as determined in good faith by a majority of the Continuing Directors.

D. A majority of the Continuing Directors shall have the power and duty to determine for the purposes of this Article SEVENTH, on the basis of information known to them after reasonable inquiry, (a) whether a person is an Interested Stockholder, (b) the number of shares of Capital Stock or other securities beneficially owned by any person, (c) whether a person is an Affiliate or Associate of another and (d) whether the assets that are the subject of any Business Combination have, or the consideration to be received for the issuance or transfer of securities by this Corporation or any Subsidiary in any Business Combination has, an aggregate Fair Market Value in excess of the amount set forth in Paragraph 1(b) of Section C of this Article SEVENTH. Any such determination made in good faith shall be binding and conclusive on all parties.

E. Nothing contained in this Article SEVENTH shall be construed to relieve any Interested Stockholder from any fiduciary obligation imposed by law.

EIGHTH: When considering a merger, consolidation, Business Combination or similar transaction, the Board of Directors, committees of the Board of Directors, individual directors and individual officers may, in considering the best interests of the Corporation and its stockholders, consider the effects of any such transaction upon the employees, customers and suppliers of the Corporation, and upon communities in which offices of the Corporation are located.

NINTH: Notwithstanding any other provisions of this Certificate of Incorporation or the By-Laws of the Corporation (and notwithstanding the fact that a lesser percentage or separate class vote may be specified by law, this Certificate of Incorporation or the By-Laws of the Corporation), (i) the affirmative vote of the holders of not less than eighty percent (80%) of the votes entitled to be cast by the holders of all outstanding shares of Voting Stock, voting together as a single class, shall be required to amend or repeal, or adopt any provisions inconsistent with, Articles FIFTH and SIXTH, and (ii) the affirmative vote of the holders of (x) not less than eighty percent (80%) of the votes entitled to be cast by the holders of all outstanding shares of Voting Stock voting together as a single class, and (y) not less than a majority of the votes entitled to be cast by the holders of all outstanding shares of Voting Stock which are beneficially owned by persons other than Interested Stockholders, if any, voting together as a single class, shall be required to amend or repeal, or adopt any provisions inconsistent with Articles SEVENTH and NINTH; provided, however, that, with respect to Articles FIFTH, SIXTH, SEVENTH, and NINTH such special voting requirements shall not apply to, and such special votes shall not be required for, any amendment, repeal or adoption

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recommended by the Board of Directors if a majority of the directors then in office are persons who would be eligible to serve as Continuing Directors.

TENTH: No director shall be personally liable to the Corporation or any of its stockholders for monetary damages for any breach of fiduciary duty as a director, except for liability (i) for any breach of the director’s duty of loyalty to the Corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) pursuant to Section 174 of the Delaware General Corporation Law, or (iv) for any transaction from which the director derived an improper personal benefit. Any repeal of modification of this Article TENTH by the stockholders of the Corporation shall not adversely affect any right of protection of a director of the Corporation existing at the time of such repeal or modification with respect to acts or omissions occurring prior to such repeal or modification.

ELEVENTH: Subject to the provisions of this Certificate of Incorporation, the Corporation reserves the right to amend, alter, change or repeal any provision contained in this Certificate of Incorporation, in the manner now or thereafter prescribed by statute, and all rights conferred upon stockholders herein are granted subject to this reservation.

IN WITNESS WHEREOF, the undersigned has caused this Amended and Restated Certificate of Incorporation to be executed by its duly authorized officer on this 23rd day of May, 2013.

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