Exhibit 3.1

IQVIA HOLDINGS INC.

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

1. The name of the corporation is “IQVIA Holdings Inc.” (hereinafter referred to as the “Corporation”).

2. The street address and county of the registered office of the Corporation in the State of Delaware is 1209 Orange Street, in the City of Wilmington, County of New Castle, 19801, and the name of its registered agent at such address is The Corporation Trust Company.

3. The purpose for which the Corporation is organized 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”).

4. Capitalization.

A. Authorized Shares. The Corporation shall have authority to issue four hundred and one million (401,000,000) shares, consisting of (a) four hundred million (400,000,000) shares of Common Stock, par value $0.01 per share (the “Common Stock”); and (b) one million (1,000,000) shares of Preferred Stock, par value $0.01 per share (the “Preferred Stock”).

B. Common Stock. All shares of Common Stock will be identical in all respects and will entitle the holders thereof to the same preferences, limitations and relative rights.

1. Voting Rights. On all matters to be voted on by the Corporation’s stockholders, each holder of record of shares of Common Stock will be entitled to one vote per share so held.

2. Dividends. When and as dividends are declared or paid on shares of Common Stock, whether in cash, property or securities of the Corporation, each holder of record of shares of Common Stock will be entitled to a ratable portion of such dividend, based upon the number of shares of Common Stock then held of record by each such holder.

3. Liquidation. The holders of the Common Stock will be entitled to share ratably, on the basis of the number of shares of Common Stock then held by each such holder, in all distributions to the holders of the Common Stock in any liquidation, dissolution or winding up of the Corporation.

C. Preferred Stock. The Preferred Stock may be issued from time to time in one or more series, the shares of each such series to have such designations, preferences, relative rights and powers, including voting powers (or qualifications, limitations or restrictions thereof) as are stated in the resolution or resolutions providing for the issuance of such series adopted by the Board of Directors of the Corporation. Authority is expressly granted to the Board of Directors, subject to the provisions hereof and to any limitations provided under the DGCL, to authorize the issuance of one or more series within the class of Preferred Stock, and with respect to each such series to determine and fix by resolution or resolutions the designations, preferences, relative rights and powers, including voting powers, full or limited, or no voting power, of such shares, or the qualifications, limitations or restrictions of such shares. This paragraph is intended to afford to the Board of Directors the maximum authority permitted under the DGCL.

5. Stockholders of the Corporation may not take any action by written consent in lieu of a meeting.

Subject to the requirements of applicable law, a special meeting of the stockholders of the Corporation may be called at any time (i) by a majority of the members of the Board of Directors or (ii) by the Chairman of the Board or Chief Executive Officer of the Corporation. Any special meeting of the stockholders shall be held on such date, at such time and at such place within or outside the State of Delaware as the Corporation may designate. Notice of every special meeting of the stockholders of the Corporation shall state the purpose or purposes of such meeting. No business may be transacted and no corporate action may be taken at a special meeting other than business within the purpose or purposes stated in the notice of the meeting unless all of the stockholders are present in person or by proxy, in which case any and all business may be transacted at the meeting even though the meeting is held without notice.

6. The Corporation shall be entitled to treat the person in whose name any shares are registered as the owner thereof for all purposes and shall not be bound to recognize any equitable or other claim to, or interest in, such shares on the part of any other person, whether or not the Corporation shall have notice thereof, except as required by applicable law.

7. The business and affairs of the Corporation shall be managed by or under the direction of the Board of Directors. The number of directors which shall constitute the Board of Directors shall be not less than five (5) nor more than seventeen (17), and shall be fixed in such a manner as may be prescribed by the Bylaws. The directors shall be divided into three classes designated Class I, Class II and Class III with each class consisting, as nearly as possible, of one-third of the total number of directors constituting the entire Board of Directors. Class I directors shall initially serve for a term expiring at the first annual meeting of stockholders following the effectiveness of this Certificate of Incorporation, Class II directors shall initially serve for a term expiring at the second annual meeting of stockholders following the effectiveness of this Certificate of Incorporation and Class III directors shall initially serve for a term expiring at the third annual meeting of stockholders following the effectiveness of this Certificate of Incorporation. At each succeeding annual meeting, successors to the class of directors whose term expires at that annual meeting shall be elected for a term expiring at the third succeeding annual meeting of stockholders. If the number of directors is changed, any increase or decrease shall be apportioned among the classes so as to maintain the number of directors in each class as nearly equal as

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possible, and any additional director of any class appointed or elected to fill a newly created directorship resulting from an increase in such class shall hold office for a term that shall coincide with the remaining term of that class, but in no case shall a decrease in the number of directors remove or shorten the term of any incumbent director. A director shall hold office until the annual meeting at which his or her term expires and until his or her successor shall be elected and qualified, subject, however, to prior death, resignation, retirement, disqualification or removal from office. The Board of Directors is authorized to assign members of the Board of Directors already in office to their respective initial class.

8. In furtherance and not in limitation of the powers conferred by law, the Board of Directors is expressly authorized to adopt, alter, amend and repeal the Bylaws of the Corporation. Any amendment, alteration, change, addition or repeal of the Bylaws of the Corporation by the stockholders of the Corporation shall require the affirmative vote of the holders of at least seventy-five percent (75%) of the outstanding shares of the Corporation, voting together as a class, entitled to vote on such amendment, alteration, change, addition or repeal.

9. Subject to the Bylaws of the Corporation, the stockholders may, at any meeting the notice of which shall state that it is called for that purpose, remove, only for cause and with the affirmative vote of the holders of at least seventy-five percent (75%) of the outstanding shares of the Corporation, voting together as a class, any Director, or the entire Board of Directors, and fill the vacancy or vacancies; in each case provided that whenever any director shall have been elected by a voting group of stockholders, only the stockholders from that voting group may participate in the vote to remove him or her, and such vacancy may be filled only by the holders of shares of that voting group. Subject to the Bylaws of the Corporation, vacancies caused by any such removal and not filled by the stockholders at the meeting at which such removal shall have been made, or any vacancy caused by the death or resignation of any director or for any other reason, and any newly created directorship resulting from any increase in the authorized number of Directors, may be filled only by the affirmative vote of a majority of the directors then in office, although less than a quorum. Any director so elected to fill any such vacancy or newly created directorship shall hold office until the next election of the class for which such director has been chosen and until his or her successor is elected and qualified or until his or her earlier resignation or removal.

Subject to the Bylaws of the Corporation, when one or more directors shall resign effective at a future date, a majority of the directors then in office, including those who have so resigned, shall have power to fill such vacancy or vacancies, the vote thereon to take effect when such resignation or resignations shall become effective, and each director so chosen shall hold office as herein provided in connection with the filling of other vacancies.

10. Limitation of Director Liability; Indemnification

(A) Limitation of Director Liability. To the fullest extent that the DGCL or any other law of the State of Delaware (as they exist on the date hereof or as they may hereafter be amended) permits the limitation or elimination of the liability of directors, no director of the Corporation shall be liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a director. No amendment to, or modification or repeal of, this Article 10 shall adversely affect any right or protection of a director of the Corporation existing

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hereunder with respect to any state of facts existing or act or omission occurring, or any cause of action, suit or claim that, but for this Article 10, would accrue or arise, prior to such amendment, modification or repeal. If the DGCL is amended after the Effective Time to authorize corporate action further eliminating or limiting the personal liability of directors, then the liability of a director of the Corporation shall be eliminated or limited to the fullest extent permitted by the DGCL, as so amended.

(B) Indemnification.

1. Nature of Indemnity. The Corporation shall indemnify any person (an “Indemnitee”) who at any time serves or has served as a director or officer of the Corporation, or at the request of the Corporation is or was serving as a director, officer, partner, member, trustee, employee or agent of any other foreign or domestic corporation, partnership, limited liability company, joint venture, trust, employee benefit plan, or other enterprise, or as a trustee or administrator under any employee benefit plan of the Corporation or any wholly owned subsidiary thereof (any such entity, an “Other Entity”), to the fullest extent from time to time permitted by law in the event he or she is or is threatened to be involved as a party, witness or otherwise in any threatened, pending or completed action, demand, suit or proceeding, whether civil, criminal, administrative, arbitrative, investigative or other and whether formal or informal, including but not limited to any investigation, inquiry, hearing or alternative dispute resolution process, whether or not brought by or on behalf of the Corporation, by reason of the fact that he or she is or was acting in such capacity; provided , however , that the Corporation shall not indemnify any such Indemnitee against liability or expenses such person may incur on account of his or her activities which were, at the time taken, known or believed by him or her to be clearly in conflict with the best interests of the Corporation. The rights of those receiving indemnification hereunder shall, to the fullest extent from time to time permitted by law, cover (1) reasonable expenses, including without limitation all reasonable attorneys’ fees actually incurred by him or her in connection with any such action, suit or proceeding; (2) all payments made by him or her in satisfaction of any judgment, money decree, fine (including an excise tax assessed with respect to an employee benefit plan), penalty, or settlement for which he or she may have become liable in such action, suit or proceeding; and (3) all reasonable expenses incurred in enforcing the indemnification rights provided herein. The rights granted herein shall not be limited by the provisions contained in Section 145 of the DGCL.

2. Determination That Indemnification Is Proper. The Board of Directors shall take all such action as may be necessary and appropriate to authorize the Corporation to pay the indemnification required by Article 10(B)(1), including without limitation making a determination that indemnification is permissible in the circumstances and a good faith evaluation of the manner in which the claimant for indemnity acted and of the reasonable amount of indemnity due him or her. The Board of Directors may appoint a committee or special counsel to make such determination and evaluation. The Board of Directors may give notice to, and obtain approval by, the stockholders of the Corporation for any decision to indemnify.

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3. Advance Payment of Expenses. Expenses incurred by a director or an officer in connection with an action, suit or proceeding referred to in Article 10(B)(1) shall be paid by the Corporation in advance of the final disposition of such action, suit or proceeding upon receipt of an undertaking by or on behalf of the director or officer to repay such amount unless it shall ultimately be determined that he or she is entitled to be indemnified by the Corporation pursuant to this Article 10(B); provided , however , that the Corporation shall have no obligation to advance expenses incurred by a director or officer with respect to any claim initiated by such director or officer without the prior written consent of or authorization of the Board of Directors (other than a claim brought by a director or officer to enforce his or her or rights under this Article 10). Such expenses incurred by other employees and agents may be so paid upon such terms and conditions, if any, as the Board of Directors deems appropriate. The Board of Directors may authorize the Corporation’s legal counsel to represent such director, officer, employee or agent in any action, suit or proceeding, whether or not the Corporation is a party to such action, suit or proceeding.

4. No Duplication of Payments. The Corporation shall not be liable under this Article 10(B) to make any payment in connection with any claim made against any Indemnitee to the extent such person has otherwise received payment (under any insurance policy, bylaw or otherwise) of the amounts otherwise payable as indemnity hereunder; provided , however , that the Corporation agrees that, as between the Corporation, on the one hand, and any Sponsor Stockholder with whom a director is or was affiliated and any insurer providing insurance coverage to such Sponsor Stockholder, on the other hand, the Corporation (1) is the indemnitor of first resort under this Article 10 (i.e., its obligations under this Article 10 are primary and any indemnification or advancement obligations of any Sponsor Stockholder with whom a director is or was affiliated and the obligations of any insurer of such Sponsor Stockholder to provide insurance coverage with respect to the same obligations are secondary), (2) shall be required to advance the full amount of expenses incurred by the director and shall be liable for the full amount of indemnification obligations as required by the terms of this Certificate of Incorporation and any other agreements the Corporation may have with the director, without regard to any rights the director may have against such Sponsor Stockholder, and (c) unconditionally and irrevocably waives, relinquishes, releases such Sponsor Stockholder from and agrees not to exercise any rights that it may have with respect to any and all claims for contribution, subrogation or any other recovery of any kind in respect thereof. For purposes of this Article 10, “Sponsor Stockholder” means any current or former stockholder that is or was party to the Stockholders Agreement (as defined below), any Affiliate (as defined in the Stockholders Agreement) of such stockholder (other than the Corporation and its subsidiaries), and/or any other investment entity or related management company that is advised by the same investment adviser as any of the foregoing entities or by an Affiliate (as defined in the Stockholders Agreement) of such investment adviser.

5. Subrogation. Subject to the limitations set forth in Article 10(B)(4), in the event of payment of indemnification to an Indemnitee, the Corporation shall be subrogated to the extent of such payment to any right of recovery such person may have and such

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person, as a condition of receiving indemnification from the Corporation, shall execute all documents and do all things that the Corporation may deem necessary or desirable to perfect such right of recovery, including the execution of such documents necessary to enable the Corporation effectively to enforce any such recovery.

(C) Insurance. The Corporation shall have the power to purchase and maintain insurance on behalf of any person who is or was a director, officer, trustee, employee, member or agent of the Corporation, or was serving at the request of the Corporation as a director, officer, trustee, employee, member or agent of an Other Entity, against any liability asserted against the person and incurred by the person in any such capacity, or arising out of his or her status as such, whether or not the Corporation would have the power or the obligation to indemnify such person against such liability under the provisions of this Article 10 or the DGCL.

(D) Non-Exclusivity of Rights. The rights conferred on any Indemnitee by this Article 10 are not exclusive of other rights arising under any bylaw, agreement, vote of directors or stockholders or otherwise, and shall continue as to a person who has ceased to be a director, officer, employee or agent, and shall inure to the benefit of the heirs and legal representatives of such Indemnitee. The Corporation may enter into an agreement with any of its directors, officers, employees or agents providing for indemnification and advancement of expenses, including attorneys’ fees, that may change, enhance, qualify or limit any right to indemnification or advancement of expenses created by this Article 10.

(E) Survival; Amendment or Repeal. The foregoing provisions of this Article 10 shall be deemed to be a contract between the Corporation and each Indemnitee at any time while these provisions as well as the relevant provisions of the DGCL are in effect and any repeal or modification thereof shall not affect any right or obligation then existing with respect to any state of facts then or previously existing or any action, suit, or proceeding previously or thereafter brought or threatened based in whole or in part upon any such state of facts. Such a contract right may not be modified retroactively without the consent of the Indemnitee.

(F) Other Indemnification. This Article 10 shall not limit the right of the Corporation, to the extent and in the manner permitted by law, to indemnify and to advance expenses to Indemnitees or persons other than Indemnitees when and as authorized by appropriate corporate action, including without limitation by separate agreement with the Corporation.

11. Except as set forth herein, the Corporation reserves the right to amend, alter, change or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by statute, and all rights conferred on stockholders herein are granted subject to this reservation.

12. Meetings of stockholders may be held within or without the State of Delaware, as the Bylaws of the Corporation may provide. The books of the Corporation may be kept (subject to any provision contained in applicable law) outside the State of Delaware at such place as may be designated from time to time by the Board of Directors or in the Bylaws of the Corporation.

13. The stockholders of the Corporation shall have no right to cumulate their votes for the election of directors.

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14. Renouncement of Corporate Opportunity.

A. Scope. The provisions of this Article 14 are set forth to define, to the extent permitted by applicable law, the duties of Exempted Persons (as defined below) to the Corporation and, to the extent applicable, its stockholders, with respect to certain classes or categories of business opportunities. “Exempted Person” means each of the Bain Shareholders, the TPG Shareholders, the CPP Shareholder and the LG Shareholders (each as defined in the Shareholders Agreement, dated as of May 3, 2016, by and among the Corporation and certain of its stockholders named therein, as such agreement existed as of May 3, 2016 (the “Stockholders Agreement”)), their respective Affiliates (other than the Corporation and its subsidiaries), TPG Global, LLC and Bain Capital, LLC and their Affiliates and all of their respective partners, principals, directors, officers, members, managers, managing directors and/or employees, including any of the foregoing who serve as officers or directors of the Corporation. Solely for purposes of this Article 14, references to “Affiliate”, “Nominee”, and “Stockholder Group” have the meaning ascribed to such terms in the Stockholders Agreement.

B. Competition and Allocation of Corporate Opportunities. The Exempted Persons shall not have any fiduciary or other duty to refrain from engaging directly or indirectly in the same or similar business activities or lines of business as the Corporation or any of its subsidiaries. To the fullest extent permitted by applicable law, the Corporation, on behalf of itself and its subsidiaries, renounces any interest or expectancy of the Corporation and its subsidiaries in, or in being offered an opportunity to participate in, business opportunities that are from time to time presented to the Exempted Persons, even if the opportunity is one that the Corporation or its subsidiaries might reasonably be deemed to have pursued or had the ability or desire to pursue if granted the opportunity to do so, and each such Exempted Person shall have no duty to communicate or offer such business opportunity to the Corporation and, to the fullest extent permitted by applicable law, shall not be liable to the Corporation or any of its subsidiaries or, to the extent applicable, any of its or their stockholders, for breach of any fiduciary or other duty, as a director or officer or otherwise, by reason of the fact that such Exempted Person pursues or acquires such business opportunity, directs such business opportunity to another person or fails to present such business opportunity, or information regarding such business opportunity, to the Corporation or its subsidiaries.

C. Certain Matters Deemed Not Corporate Opportunities. In addition to and notwithstanding the foregoing provisions of this Article 14, a corporate opportunity shall not be deemed to belong to the Corporation if it is a business opportunity that the Corporation is not financially able or contractually permitted or legally able to undertake, or that is, from its nature, not in the line of the Corporation’s business or is of no practical advantage to it or that is one in which the Corporation has no interest or reasonable expectancy.

D. Effect of Stockholders Agreement. The provisions of Sections B and C of this Article 14 (i) shall be subject to compliance with any procedures regarding corporate opportunities specified in the Stockholders Agreement and (ii) shall continue with respect to an Exempted Person until the first date that both of the following conditions are true

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(a) such Exempted Person’s applicable Stockholder Group is not entitled to designate at least one (1) Nominee to the Board of Directors of the Corporation pursuant to the Stockholders Agreement, and (b) no individual is serving on the Board who has at any time been designated as a Nominee by such Exempted Person’s applicable Stockholder Group.

E. Amendment of this Article 14. No amendment or repeal of this Article 14 in accordance with the provisions of Article 11 shall apply to or have any effect on the liability or alleged liability of any Exempted Person for or with respect to any activities or opportunities of which such Exempted Person becomes aware prior to such amendment or repeal. This Article 14 shall not limit any protections or defenses available to, or indemnification or advancement rights of, any director or officer of the Corporation under this Certificate of Incorporation of the Corporation, the Corporation’s bylaws or applicable law.

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