Exhibit 3.2

AMENDED AND RESTATED BY-LAWS

PROOFPOINT, INC.

A Delaware corporation

Adopted as of August 31, 2021

ARTICLE I

OFFICES

Section 1 Registered Office. The registered office of the corporation in the State of Delaware shall be located at 1209 Orange Street, city of Wilmington, Delaware, 19801, County of New Castle. The name of the corporation’s registered agent at such address shall be The Corporation Trust Company. The registered office and/or registered agent of the corporation may be changed from time to time by action of the board of directors.

Section 2 Other Offices. The corporation may also have offices at such other places, both within and without the State of Delaware, as the board of directors may from time to time determine or the business of the corporation may require.

ARTICLE II

MEETINGS OF STOCKHOLDERS

Section 1 Annual Meetings. An annual meeting of the stockholders shall be held each year within one hundred twenty (120) days after the close of the immediately preceding fiscal year of the corporation for the purpose of electing directors and conducting such other proper business as may come before the meeting. The date, time and place, if any, and/or the means of remote communication, of the annual meeting shall be determined by the president of the corporation; provided, however, that if the president does not act, the board of directors shall determine the date, time and place, if any, and/or the means of remote communication, of such meeting. No annual meeting of stockholders need be held if not required by the corporation’s certificate of incorporation or by the General Corporation Law of the State of Delaware.

Section 2 Special Meetings. Special meetings of stockholders may be called for any purpose (including, without limitation, the filling of board vacancies and newly created directorships) and may be held at such time and place, within or without the State of Delaware, and/or by means of remote communication, as shall be stated in a written notice of meeting. Such meetings may be called by the board of directors or the president only with five business days prior written notice (which notice period may not be waived) to the stockholders and shall be called by the president upon the written request of holders of shares entitled to cast not less than fifty percent of the votes at the meeting, which written request shall state the purpose or purposes of the meeting and shall be delivered to the president. The date, time and place, if any, and/or remote communication, of any special meeting of stockholders shall be determined by the president of the corporation; provided, however, that if the president does not act, the board of directors shall determine the date, time and place, if any, and/or the means of remote communication, of such meeting. On such written request, the president shall fix a date and time for such meeting within 2 days after receipt of a request for such meeting in such written request.

Section 3 Place of Meetings. The board of directors may designate any place, either within or without the State of Delaware, and/or by means of remote communication, as the place of meeting for any annual meeting or for any special meeting called by the board of directors. If no designation is made, or if a special meeting be otherwise called, the place of meeting shall be the principal executive office of the corporation.

Section 4 Notice. Whenever stockholders are required or permitted to take any action at a meeting, written or printed notice stating the place, if any, date and hour of the meeting, the means of remote communications, if any, by which stockholders and proxy holders may be deemed to be present in person and vote at such meeting, and, in the case of special meetings, the purpose or purposes, of such meeting, shall be given to each stockholder entitled to vote at such meeting and to each director not less than 10 nor more than 60 days before the date of the meeting. All such notices shall be delivered, either personally, by mail, or by a form of electronic transmission consented to by the stockholder to whom the notice is given, by or at the direction of the board of directors, the president or the secretary, and if mailed, such notice shall be deemed to be delivered when deposited in the United States mail, postage prepaid, addressed to the stockholder at his, her or its address as the same appears on the records of the corporation. If given by electronic transmission, such notice shall be deemed to be delivered (a) if by facsimile telecommunication, when directed to a number at which the stockholder has consented to receive notice; (b) if by electronic mail, when directed to an electronic mail address at which the stockholder has consented to receive notice; (c) if by a posting on an electronic network together with separate notice to the stockholder of such specific posting, upon the later of (1) such posting and (2) the giving of such separate notice; and (3) if by any other form of electronic transmission, when directed to the stockholder. Any such consent shall be revocable by the stockholder by written notice to the corporation. Any such consent shall be deemed revoked if (1) the corporation is unable to deliver by electronic transmission two consecutive notices given by the corporation in accordance with such consent and (2) such inability becomes known to the secretary or an assistant secretary of the corporation or to the transfer agent. Attendance of a person at a meeting shall constitute a waiver of notice of such meeting, except when the person attends for the express purpose of objecting at the beginning of the meeting to the transaction of any business because the meeting is not lawfully called or convened.

Section 5 Stockholders List. The officer who has charge of the stock ledger of the corporation shall make, at least 10 days before every meeting of the stockholders, a complete list of the stockholders entitled to vote at such meeting arranged in alphabetical order, showing the address of each stockholder and the number of shares registered in the name of each stockholder. Such list shall be open to the examination of any stockholder, for any purpose germane to the meeting, for a period of at least 10 days prior to the meeting: (i) on a reasonably accessible electronic network, provided that the information required to gain access to such list is provided with the notice of the meeting, and/or (ii) during ordinary business hours, at the principal place of business of the corporation. In the event that the corporation determines to make the list available on an electronic network, the corporation may take reasonable steps to ensure that such information is available only to stockholders of the corporation. If the meeting

is to be held at a place, then the list shall be produced and kept at the time and place of the meeting during the whole time thereof, and may be inspected by any stockholder who is present. If the meeting is to be held solely by means of remote communication, then the list shall also be open to the examination of any stockholder during the whole time of the meeting on a reasonably accessible electronic network, and the information required to access such list shall be provided with the notice of the meeting.

Section 6 Quorum. The holders of a majority of the votes represented by the issued and outstanding shares of capital stock, entitled to vote thereon, present in person or represented by proxy, shall constitute a quorum at all meetings of the stockholders, except as otherwise provided by statute or by the certificate of incorporation. If a quorum is not present, the holders of a majority of the shares present in person or represented by proxy at the meeting, and entitled to vote at the meeting, may adjourn the meeting to another time and/or place. When a quorum is once present to commence a meeting of stockholders, it is not broken by the subsequent withdrawal of any stockholders or their proxies.

Section 7 Adjourned Meetings. When a meeting is adjourned to another time and place, notice need not be given of the adjourned meeting if the time, place, if any, thereof, and the means of remote communications, if any, by which stockholders and proxy holders may be deemed to be present in person and vote at such adjourned meeting are announced at the meeting at which the adjournment is taken. At the adjourned meeting, the corporation may transact any business which might have been transacted at the original meeting. If the adjournment is for more than 30 days, or if after the adjournment a new record date is fixed for the adjourned meeting, a notice of the adjourned meeting shall be given to each stockholder of record entitled to vote at the meeting.

Section 8 Vote Required. When a quorum is present, the affirmative vote of the majority of shares present in person or represented by proxy at the meeting and entitled to vote on the subject matter shall be the act of the stockholders, unless the question is one upon which by express provisions of an applicable law or of the certificate of incorporation a different vote is required, in which case such express provision shall govern and control the decision of such question.

Section 9 Voting Rights. Except as otherwise provided by the General Corporation Law of the State of Delaware or by the certificate of incorporation of the corporation or any amendments thereto and subject to Section 3 of Article VI hereof, every stockholder shall at every meeting of the stockholders be entitled to one vote in person or by proxy for each share of common stock held by such stockholder.

Section 10 Proxies. Each stockholder entitled to vote at a meeting of stockholders or to express consent or dissent to corporate action in writing without a meeting may authorize another person or persons to act for such stockholder by proxy, but no such proxy shall be voted or acted upon after three years from its date, unless the proxy provides for a longer period. At each meeting of the stockholders, and before any voting commences, all proxies filed at or before the meeting shall be submitted to and examined by the secretary or a person designated by the secretary, and no shares may be represented or voted under a proxy that has been found to be invalid or irregular.

Section 11 Action by Written Consent. Unless otherwise provided in the certificate of incorporation, any action required to be taken at any annual or special meeting of stockholders of the corporation, or any action which may be taken at any annual or special meeting of such stockholders, may be taken without a meeting, without prior notice and without a vote, if a consent or consents in writing, setting forth the action so taken and bearing the dates of signature of the stockholders who signed the consent or consents, shall be signed by the holders of outstanding stock having not less than the minimum number of votes that would be necessary to authorize or take such action at a meeting at which all shares entitled to vote thereon were present and voted and shall be delivered to the corporation by delivery to its registered office in the state of Delaware, or the corporation’s principal place of business, or an officer or agent of the corporation having custody of the book or books in which proceedings of meetings of the stockholders are recorded. Delivery made to the corporation’s registered office shall be by hand or by certified or registered mail, return receipt requested or by reputable overnight courier service. All consents properly delivered in accordance with this section shall be deemed to be recorded when so delivered. No written consent shall be effective to take the corporate action referred to therein unless, within 60 days after the earliest dated consent delivered to the corporation as required by this section, written consents signed by the holders of a sufficient number of shares to take such corporate action are so recorded. Prompt notice of the taking of the corporate action without a meeting by less than unanimous written consent shall be given to those stockholders who have not consented in writing. Any action taken pursuant to such written consent or consents of the stockholders shall have the same force and effect as if taken by the stockholders at a meeting thereof.

Any copy, facsimile or other reliable reproduction of a consent in writing may be substituted or used in lieu of the original writing for any and all purposes for which the original writing could be used; provided that such copy, facsimile or other reproduction shall be a complete reproduction of the entire original writing.

Section 12 Action by Telegram, Cablegram or Other Electronic Transmission Consent. A telegram, cablegram or other electronic transmission consenting to an action to be taken and transmitted by a stockholder or proxyholder, or by a person or persons authorized to act for a stockholder or proxyholder, shall be deemed to be written, signed and dated for the purposes of this section; provided that any such telegram, cablegram or other electronic transmission sets forth or is delivered with information from which the corporation can determine (A) that the telegram, cablegram or other electronic transmission was transmitted by the stockholder or proxyholder or by a person or persons authorized to act for the stockholder or proxyholder and (B) the date on which such stockholder or proxyholder or authorized person or persons transmitted such telegram, cablegram or electronic transmission. The date on which such telegram, cablegram or electronic transmission is transmitted shall be deemed to be the date on which such consent was signed. No consent given by telegram, cablegram or other electronic transmission shall be deemed to have been delivered until such consent is reproduced in paper form and until such paper form shall be delivered to the corporation by delivery to its registered office in the State of Delaware, its principal place of business or an officer or agent of the corporation having custody of the book in which proceedings of meetings of stockholders are recorded if, to the extent and in the manner provided by resolution of the board of directors of the corporation.

ARTICLE III

DIRECTORS

Section 1 General Powers. The business and affairs of the corporation shall be managed by or under the direction of the board of directors.

Section 2 Number, Election and Term of Office. The number of directors which shall constitute the first board shall be two (2). Thereafter, the number of directors shall be established from time to time by resolution of the board. The directors shall be elected by a plurality of the votes of the shares present in person or represented by proxy at the meeting and entitled to vote in the election of directors. The directors shall be elected in this manner at the annual meeting of the stockholders, except as provided in Section 4 of this Article III. Each director elected shall hold office until a successor is duly elected and qualified or until his or her earlier death, resignation or removal as hereinafter provided.

Section 3 Removal and Resignation. Any director or the entire board of directors may be removed at any time, with or without cause, by the holders of a majority of the shares then entitled to vote at an election of directors. Whenever the holders of any class or series are entitled to elect one or more directors by the provisions of the corporation’s certificate of incorporation, the provisions of this section shall apply, in respect to the removal without cause of a director or directors so elected, to the vote of the holders of the outstanding shares of that class or series and not to the vote of the outstanding shares as a whole. Any director may resign at any time upon notice given in writing or by electronic transmission to the corporation.

Section 4 Vacancies. Except as otherwise provided in the certificate of incorporation of the corporation, board vacancies and newly created directorships resulting from any increase in the authorized number of directors may be filled by a majority of the directors then in office, though less than a quorum, or by a sole remaining director. Each director so chosen shall hold office until a successor is duly elected and qualified or until his or her earlier death, resignation or removal as herein provided.

Notwithstanding the foregoing, any such vacancy shall automatically reduce the authorized number of directors pro tanto, until such time as the holders of outstanding shares of capital stock who are entitled to elect the director whose office is vacant shall have exercised their right to elect a director to fill such vacancy, whereupon the authorized number of directors shall be automatically increased pro tanto. Each director so chosen shall hold office until a successor is duly elected and qualified or until his or her earlier death, resignation or removal as herein provided.

Section 5 Annual Meetings. The annual meeting of each newly elected board of directors shall be held without notice (other than notice under these by-laws) immediately after, and at the same place, if any, as the annual meeting of stockholders.

Section 6 Other Meetings and Notice. Regular meetings, other than the annual meeting, of the board of directors may be held without notice at such time and at such place, if any, as shall from time to time be determined by resolution of the board of directors and promptly communicated to all directors then in office. Special meetings of the board of directors may be called by or at the request of the president or at least one of the directors on at least 24 hours notice to each director, either personally, by telephone, by mail, telegraph, and/or by electronic transmission. In like manner and on like notice, the president must call a special meeting on the written request of at least 2 of the directors promptly after receipt of such request.

Section 7 Quorum, Required Vote and Adjournment. A majority of the total number of authorized directors shall constitute a quorum for the transaction of business. The vote of a majority of directors present at a meeting at which a quorum is present shall be the act of the board of directors. If a quorum shall not be present at any meeting of the board of directors, the directors present thereat may adjourn the meeting from time to time, without notice other than announcement at the meeting, until a quorum shall be present. Except as otherwise required by the corporation’s certificate of incorporation, each director shall be entitled to one vote.

Section 8 Committees. The board of directors may, by resolution passed by a majority of the whole board, designate one or more committees, each committee to consist of one or more of the directors of the corporation, which to the extent provided in such resolution or these by-laws shall have and may exercise the powers of the board of directors in the management and affairs of the corporation, except as otherwise limited by law. The board of directors may designate one or more directors as alternate members of any committee, who may replace any absent or disqualified member at any meeting of the committee. Such committee or committees shall have such name or names as may be determined from time to time by resolution adopted by the board of directors. Each committee shall keep regular minutes of its meetings and report the same to the board of directors when required.

Section 9 Committee Rules. Each committee of the board of directors may fix its own rules of procedure and shall hold its meetings as provided by such rules, except as may otherwise be provided by a resolution of the board of directors designating such committee. Unless otherwise provided in such a resolution, the presence of a majority of the members of the committee then in office shall be necessary to constitute a quorum. In the event that a member and that member’s alternate, if alternates are designated by the board of directors as provided in Section 8 of this Article III, of such committee is or are absent or disqualified, the member or members thereof present at any meeting and not disqualified from voting, whether or not such member or members constitute a quorum, may unanimously appoint another member of the board of directors to act at the meeting in place of any such absent or disqualified member.

Section 10 Executive Committee. The board of directors of the corporation may, by resolution adopted by a majority of the whole board, designate two directors to constitute an executive committee. The executive committee, to the extent provided in the resolution, shall have and may exercise all of the authority of the board of directors in the management of the corporation, except that the committee shall have no authority in reference to amending the certificate of incorporation; adopting an agreement of merger or consolidation; recommending to the stockholders the sale, lease, or exchange of all or substantially all of the corporation’s property and assets; recommending to the stockholders a dissolution of the corporation or a revocation of a dissolution; amending the by-laws of the corporation; electing or removing directors or officers of the corporation or members of the executive committee; declaring dividends; or amending, altering, or repealing any resolution of the board of directors which, by its terms, provides that it shall not be amended, altered or repealed by the executive committee. The board of directors shall have power at any time to fill vacancies in, to change the size or membership of and to discharge the executive committee.

Section 11 Audit Committee. The audit committee shall consist of not fewer than two members of the board of directors as shall from time to time be appointed by resolution of the board of directors. No member of the board of directors who is an affiliate of the corporation or an officer or an employee of the corporation or any subsidiary of the corporation shall be eligible to serve on the audit committee. The audit committee shall review and, as it shall deem appropriate, recommend to the board internal accounting and financial controls for the corporation and accounting principles and auditing practices and procedures to be employed in the preparation and review of financial statements of the corporation. The audit committee shall make recommendations to the board of directors concerning the engagement of independent public accountants to audit the annual financial statements of the corporation and the scope of the audit to be undertaken by such accountants.

Section 12 Compensation Committee. The compensation committee shall consist of not fewer than two members of the board of directors as from time to time shall be appointed by resolution of the board of directors. No member of the board of directors who is an affiliate of the corporation or an officer or an employee of the corporation or any subsidiary of the corporation shall be eligible to serve on the compensation committee. The compensation committee shall review and, as it deems appropriate, recommend to the president and the board of directors policies, practices and procedures relating to the compensation of managerial and executive level employees and the establishment and administration of employee benefit plans. The compensation committee shall have and exercise all authority under any employee stock option plans of the corporation as the committee described therein (unless the board of directors by resolution appoints any other committee to exercise such authority), and shall otherwise advise and consult with the officers of the corporation as may be requested regarding managerial personnel policies.

Section 13 Communications Equipment. Members of the board of directors or any committee thereof may participate in and act at any meeting of such board or committee by means of conference telephone or other communications equipment by means of which all persons participating in the meeting can hear each other, and participation in the meeting pursuant to this section shall constitute presence in person at the meeting.

Section 14 Waiver of Notice and Presumption of Assent. Any member of the board of directors or any committee thereof who is present at a meeting shall be conclusively presumed to have waived notice of such meeting, except when such member attends for the express purpose of objecting at the beginning of the meeting to the transaction of any business because the meeting is not lawfully called or convened. Such member shall be conclusively presumed to have assented to any action taken unless his or her dissent shall be entered in the minutes of the meeting or unless his or her written dissent to such action shall be filed with the person acting as the secretary of the meeting before the adjournment thereof or shall be forwarded by registered mail to the secretary of the corporation immediately after the adjournment of the meeting. Such right to dissent shall not apply to any member who voted in favor of such action.

Section 15 Action by Written Consent. Unless otherwise restricted by the certificate of incorporation, any action required or permitted to be taken at any meeting of the board of directors, or of any committee thereof, may be taken without a meeting if all members of the board or committee, as the case may be, consent thereto in writing or by electronic transmission, and the writing or writings or electronic transmission or transmissions are filed with the minutes of proceedings of the board, or committee. Such filing shall be in paper form if the minutes are maintained in paper form and shall be in electronic form if the minutes are maintained in electronic form.

ARTICLE IV

OFFICERS

Section 1 Number. The officers of the corporation shall be elected by the board of directors and may consist of a chairman of the board, a vice chairman of the board, a president and chief executive officer, one or more vice-presidents, a chief operating officer, a chief financial officer, an executive vice president, a secretary, a treasurer, and such other officers and assistant officers as may be deemed necessary or desirable by the board of directors. Any number of offices may be held by the same person. In its discretion, the board of directors may choose not to fill any office for any period as it may deem advisable.

Section 2 Election and Term of Office. The officers of the corporation shall be elected annually by the board of directors at its first meeting held after each annual meeting of stockholders or as soon thereafter as conveniently may be. Vacancies may be filled or new offices created and filled at any meeting of the board of directors. Each officer shall hold office until a successor is duly elected and qualified or until his or her earlier death, resignation or removal as hereinafter provided.

Section 3 Removal. Any officer or agent elected by the board of directors may be removed by the board of directors whenever in its judgment the best interests of the corporation would be served thereby, but such removal shall be without prejudice to the contract rights, if any, of the person so removed.

Section 4 Vacancies. Any vacancy occurring in any office because of death, resignation, removal, disqualification or otherwise, may be filled by the board of directors for the unexpired portion of the term by the board of directors then in office.

Section 5 Compensation. Compensation of all officers shall be fixed by the board of directors, and no officer shall be prevented from receiving such compensation by virtue of his or her also being a director of the corporation.

Section 6 Chairman of the Board. Subject to the powers of the board of directors, the chairman of the board shall be in the general and active charge of the entire business and affairs of the corporation, and shall be its chief policy making officer. The chairman of the board shall preside at all meetings of the board of directors and at all meetings of the stockholders and shall have such other powers and perform such other duties as may be prescribed by the board of directors or provided in these by-laws. Whenever the president is unable to serve, by reason of sickness, absence or otherwise, the chairman of the board shall perform all the duties and responsibilities and exercise all the powers of the president.

Section 7 Vice-Chairman. Whenever the chairman of the board is unable to serve, by reason of sickness, absence, or otherwise, the vice-chairman shall have the powers and perform the duties of the chairman of the board. The vice-chairman shall have such other powers and perform such other duties as may be prescribed by the chairman of the board, the board of directors or these by-laws.

Section 8 The President and Chief Executive Officer. The president and chief executive officer shall be the chief executive officer of the corporation; in the absence of the chairman of the board, shall preside at all meetings of the stockholders and board of directors at which he or she is present; subject to the powers of the board of directors, and the chairman of the board, shall have general charge of the business, affairs and property of the corporation, and control over its officers, agents and employees; and shall see that all orders and resolutions of the board of directors are carried into effect. The president shall execute bonds, mortgages and other contracts requiring a seal, under the seal of the corporation, except where required or permitted by law to be otherwise signed and executed and except where the signing and execution thereof shall be expressly delegated by the board of directors to some other officer or agent of the corporation. The president shall have such other powers and perform such other duties as may be prescribed by the chairman of the board or the board of directors or as may be provided in these by-laws.

Section 9 Chief Operating Officer. The chief operating officer of the corporation, subject to the powers of the board of directors, shall engage in the general and active management of the business of the corporation; and shall see that all orders and resolutions of the board of directors are carried into effect. The chief operating officer shall have such other powers and perform such other duties as may be prescribed by the chairman of the board, the president or the board of directors or as may be provided in these by-laws.

Section 10 Chief Financial Officer. The chief financial officer of the corporation shall, under the direction of the chief executive officer, be responsible for all financial and accounting matters and for the direction of the offices of treasurer and controller. The chief financial officer shall have such other powers and perform such other duties as may be prescribed by the chairman of the board, the president or the board of directors or as may be provided in these by-laws.

Section 11 Vice-presidents. The vice-president, or if there shall be more than one, the vice-presidents in the order determined by the board of directors, shall, in the absence or disability of the president, act with all of the powers and be subject to all the restrictions of the president. The vice-presidents shall also perform such other duties and have such other powers as the board of directors, the president or these by-laws may, from time to time, prescribe.

Section 12 Secretary and Assistant Secretaries. The secretary shall attend all meetings of the board of directors, all meetings of the committees thereof and all meetings of the stockholders and record all the proceedings of the meetings in a book or books to be kept for that purpose. Under the president’s supervision, the secretary shall give, or cause to be given, all notices required to be given by these by-laws or by law, shall have such powers and perform such duties as the board of directors, the president or these by-laws may, from time to time, prescribe, and shall have custody of the corporate seal of the corporation. The secretary, or an assistant secretary, shall have authority to affix the corporate seal to any instrument requiring it and when so affixed, it may be attested by his or her signature or by the signature of such assistant secretary. The board of directors may give general authority to any other officer to affix the seal of the corporation and to attest the affixing by his or her signature. The assistant secretary, or if there be more than one, the assistant secretaries in the order determined by the board of directors, shall, in the absence or disability of the secretary, perform the duties and exercise the powers of the secretary and shall perform such other duties and have such other powers as the board of directors, the president, or secretary may, from time to time, prescribe.

Section 13 Treasurer and Assistant Treasurer. The treasurer shall have the custody of the corporate funds and securities; shall keep full and accurate accounts of receipts and disbursements in books belonging to the corporation; shall deposit all monies and other valuable effects in the name and to the credit of the corporation as may be ordered by the board of directors; shall cause the funds of the corporation to be disbursed when such disbursements have been duly authorized, taking proper vouchers for such disbursements; and shall render to the president and the board of directors, at its regular meeting or when the board of directors so requires, an account of the corporation; shall have such powers and perform such duties as the board of directors, the president or these by-laws may, from time to time, prescribe. If required by the board of directors, the treasurer shall give the corporation a bond (which shall be rendered every six years) in such sums and with such surety or sureties as shall be satisfactory to the board of directors for the faithful performance of the duties of the office of treasurer and for the restoration to the corporation, in case of death, resignation, retirement, or removal from office, of all books, papers, vouchers, money, and other property of whatever kind in the possession or under the control of the treasurer belonging to the corporation. The assistant treasurer, or if there shall be more than one, the assistant treasurers in the order determined by the board of directors, shall in the absence or disability of the treasurer, perform the duties and exercise the powers of the treasurer. The assistant treasurers shall perform such other duties and have such other powers as the board of directors, the president or treasurer may, from time to time, prescribe.

Section 14 Other Officers, Assistant Officers and Agents. Officers, assistant officers and agents, if any, other than those whose duties are provided for in these by-laws, shall have such authority and perform such duties as may from time to time be prescribed by resolution of the board of directors.

Section 15 Absence or Disability of Officers. In the case of the absence or disability of any officer of the corporation and of any person hereby authorized to act in such officer’s place during such officer’s absence or disability, the board of directors may by resolution delegate the powers and duties of such officer to any other officer or to any director, or to any other person whom it may select.

ARTICLE V

INDEMNIFICATION OF OFFICERS, DIRECTORS AND OTHERS

Section 1 Nature of Indemnity. Each person who was or is made a party or is threatened to be made a party to or is involved in any action, suit or proceeding, whether brought by or in the right of the corporation or any of its subsidiaries and whether civil, criminal, administrative or investigative (hereinafter a “proceeding”), or any appeal of such proceeding, by reason of or arising out of the fact that such person, or any other person for whom such person is the legal representative, is or was a director or officer of the corporation or is or was serving at the request of the corporation as a director, officer, manager, general partner, employee, fiduciary, or agent of another corporation or of a partnership, limited liability company, joint venture, trust or other enterprise, may be indemnified and held harmless by the corporation to the fullest extent which it is empowered to do so unless prohibited from doing so by the General Corporation Law of the State of Delaware, as the same exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the corporation to provide broader indemnification rights than said law permitted the corporation to provide prior to such amendment) against all expense, liability and loss (including attorneys’ fees actually and reasonably incurred by such person in connection with such proceeding), and such indemnification shall inure to the benefit of his or her heirs, executors and administrators; but only if such person acted in good faith and in a manner which such person reasonably believed to be (in the case of such person’s official capacity) in the best interests of the corporation or (in all other cases) not opposed to the best interests of the corporation, and in addition, in the case of a criminal action or proceeding, such person had no reasonable cause to believe that his or her conduct was unlawful; provided that, except as provided in Section 2 of this Article V, the corporation shall indemnify any such person seeking indemnification in connection with a proceeding initiated by such person only if such proceeding was authorized by the board of directors of the corporation. The right to indemnification conferred in this Article V shall be a contract right and, subject to Sections 2 and 5 hereof, shall include the right to be paid by the corporation the expenses incurred in defending any such proceeding in advance of its final disposition. The corporation may, by action of its board of directors, provide indemnification to employees and agents of the corporation with the same scope and effect as the foregoing indemnification of directors and officers.

Section 2 Procedure for Indemnification of Directors and Officers. Any indemnification of a director or officer of the corporation provided for under Section 1 of this Article V or advance of expenses provided for under Section 5 of this Article V shall be made promptly, and in any event within 30 days, upon the written request of the director or officer. If a determination by the corporation that the director or officer is entitled to indemnification pursuant to this Article V is required, and the corporation fails to respond within 60 days to a written request for indemnity, the corporation shall be deemed to have approved the request. If the corporation wrongfully denies a written request for indemnification or advancing of expenses, in whole or in part, or if payment in full pursuant to such request is not properly made within 30 days, the right to indemnification or advances as granted by this Article V shall be enforceable by the director or officer in any court of competent jurisdiction. Such person’s costs and expenses incurred in connection with successfully establishing his or her right to indemnification, in whole or in part, in any such action shall also be indemnified by the

corporation. It shall be a defense to any such action (other than an action brought to enforce a claim for expenses incurred in defending any proceeding in advance of its final disposition where the required undertaking, if any, has been tendered to the corporation) that the claimant has not met the standards of conduct which make it permissible under the General Corporation Law of the State of Delaware for the corporation to indemnify the claimant for the amount claimed, but the burden of such defense shall be on the corporation. Neither the failure of the corporation (including its board of directors, independent legal counsel, or its stockholders) to have made a determination prior to the commencement of such action that indemnification of the claimant is proper in the circumstances because he or she has met the applicable standard of conduct set forth in the General Corporation Law of the State of Delaware, nor an actual determination by the corporation (including its board of directors, independent legal counsel, or its stockholders) that the claimant has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that the claimant has not met the applicable standard of conduct. No officer or director will make any claim for indemnification against the corporation by reason of the fact that he, she, or it was a director, officer, employee, or agent of the corporation or was serving at the request of the corporation as a partner, trustee, director, officer, employee, or agent of another entity (whether such claim is for judgments, damages, penalties, fines, costs, amounts paid in settlement, losses, expenses, including any advancement thereof, or otherwise and whether such claim is pursuant to any statute, charter document, bylaw, agreement, or otherwise) with respect to any action, suit, proceeding, complaint, claim, or demand brought by the corporation against such officer or director (whether such action, suit, proceeding, complaint, claim, or demand is pursuant to applicable law or otherwise).

Section 3 Article Not Exclusive. The rights to indemnification and the payment of expenses incurred in defending a proceeding in advance of its final disposition conferred in this Article V shall not be exclusive of any other right which any person may have or hereafter acquire under any statute, provision of the certificate of incorporation, by-law, agreement, vote of stockholders or disinterested directors or otherwise.

Section 4 Insurance. The corporation may purchase and maintain insurance on its own behalf and on behalf of any person who is or was a director, officer, employee, fiduciary, or agent of the corporation or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any liability asserted against him or her and incurred by him or her in any such capacity, whether or not the corporation would have the power to indemnify such person against such liability under this Article V.

Section 5 Expenses. Expenses incurred by any person described in Section 1 of this Article V in defending a proceeding shall be paid by the corporation in advance of such proceeding’s final disposition unless otherwise determined by the board of directors in the specific case upon receipt of an undertaking by or on behalf of the director or officer or other person to repay such amount if it shall ultimately be determined that such person is not entitled to be indemnified by the corporation. 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.

Section 6 Employees and Agents. Persons who are not covered by the foregoing provisions of this Article V and who are or were employees or agents of the corporation, or who are or were serving at the request of the corporation as employees or agents of another corporation, partnership, joint venture, trust or other enterprise, may be indemnified, and may be advanced expenses, to the extent authorized at any time or from time to time by the board of directors.

Section 7 Contract Rights. The provisions of this Article V shall be deemed to be a vested contract right between the corporation and each director and officer who serves in any such capacity at any time while this Article V and the relevant provisions of the General Corporation Law of the State of Delaware or other applicable law are in effect. Such contract right shall vest for each director and officer at the time such person is elected or appointed to such position, and no repeal or modification of this Article V or any such law shall affect any such vested rights or obligations of any current or former director or officer with respect to any state of facts or proceeding regardless of when occurring.

Section 8 Merger or Consolidation. For purposes of this Article V, references to “the corporation” shall include, in addition to the resulting corporation, any constituent corporation (including any constituent of a constituent) absorbed in a consolidation or merger which, if its separate existence had continued, would have had power and authority to indemnify its directors, officers, and employees or agents, so that any person who is or was a director, officer, employee or agent of such constituent corporation, or is or was serving at the request of such constituent corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, shall stand in the same position under this Article V with respect to the resulting or surviving corporation as he or she would have with respect to such constituent corporation if its separate existence had continued.

Section 9 Obligation of the Corporation. The corporation hereby acknowledges that certain directors have certain rights to indemnification, advancement and/or reimbursement of expenses and/or insurance coverage pursuant to this Article V, in any case provided by Thoma Bravo Fund XIII, L.P., a Delaware limited partnership, Thoma Bravo Fund XIV, L.P., a Delaware limited partnership, and/or certain of its affiliates (each, a “Fund Indemnitor” and collectively, the “Fund Indemnitors”). In all cases (i) the indemnitor and/or payor of first resort shall be the corporation (i.e., the corporation’s obligations to a director are primary, and any obligation of any Fund Indemnitor to advance or reimburse expenses or to provide indemnification or insurance for the same expenses or liabilities incurred by such director are secondary), (ii) the corporation shall be required to indemnify and/or provide insurance and/or advance and/or reimburse the full amount of expenses incurred by a director, and shall be liable for the full amount of all expenses, judgments, penalties, fines and amounts paid in settlement, in each case, to the extent required by this Article V, without regard to any rights such director may have against any Fund Indemnitor, and (iii) the corporation irrevocably waives, relinquishes and releases the Fund Indemnitors from any and all claims against the Fund Indemnitors for contribution, subrogation or other recovery with respect to amounts for which the corporation is or may be or become liable pursuant to this Article V. No payment by a Fund Indemnitor on behalf, or for the benefit, of a director with respect to any claim for which such director has sought indemnification or other recovery from the corporation shall affect the foregoing, and such Fund Indemnitor shall be subrogated to the

extent thereof to all of the rights of recovery of such director against the corporation (it being understood that any indemnification, provision of insurance and/or advancement or payment made by a Fund Indemnitor is and shall be deemed voluntary by the Fund Indemnitor and shall be repaid to the Fund Indemnitor by the director from any amounts such director receives in respect thereof from the corporation, its insurer or otherwise). The Fund Indemnitors are express and intended third party beneficiaries of the terms hereof.

ARTICLE VI

CERTIFICATES OF STOCK

Section 1 Form. Every holder of stock in the corporation shall be entitled to have a certificate, signed by, or in the name of the corporation by the chairman, vice-chairman, president or a vice-president and the secretary, assistant secretary, treasurer or assistant treasurer of the corporation, or any two authorized officers of the corporation, certifying the number of shares owned by such holder in the corporation. Any or all the signatures on the stock certificates may be a facsimile. If such a certificate is countersigned (1) by a transfer agent or an assistant transfer agent other than the corporation or its employee or (2) by a registrar, other than the corporation or its employee, the signature of any such chairman, vice-chairman, president, vice-president, secretary, or assistant secretary may be facsimiles. In case any officer or officers who have signed, or whose facsimile signature or signatures have been used on, any such certificate or certificates shall cease to be such officer or officers of the corporation whether because of death, resignation or otherwise before such certificate or certificates have been delivered by the corporation, such certificate or certificates may nevertheless be issued and delivered as though the person or persons who signed such certificate or certificates or whose facsimile signature or signatures have been used thereon had not ceased to be such officer or officers of the corporation. All certificates for shares shall be consecutively numbered or otherwise identified. The name of the person to whom the shares represented thereby are issued, with the number of shares and date of issue, shall be entered on the books of the corporation. Shares of stock of the corporation shall only be transferred on the books of the corporation by the holder of record thereof or by such holder’s attorney duly authorized in writing, upon surrender to the corporation of the certificate or certificates for such shares endorsed by the appropriate person or persons, with such evidence of the authenticity of such endorsement, transfer, authorization, and other matters as the corporation may reasonably require, and accompanied by all necessary stock transfer stamps. In that event, it shall be the duty of the corporation to issue a new certificate to the person entitled thereto, cancel the old certificate or certificates, and record the transaction on its books. The board of directors may appoint a bank or trust company organized under the laws of the United States or any state thereof to act as its transfer agent or registrar, or both in connection with the transfer of any class or series of securities of the corporation.

Section 2 Lost Certificates. The board of directors may direct a new certificate or certificates to be issued in place of any certificate or certificates previously issued by the corporation alleged to have been lost, stolen, or destroyed, upon the making of an affidavit of that fact by the person claiming the certificate of stock to be lost, stolen, or destroyed. When authorizing such issue of a new certificate or certificates, the board of directors may, in its discretion and as a condition precedent to the issuance thereof, require the owner of such lost, stolen, or destroyed certificate or certificates, or his or her legal representative, to give the corporation a bond sufficient to indemnify the corporation against any claim that may be made against the corporation on account of the loss, theft or destruction of any such certificate or the issuance of such new certificate.

Section 3 Fixing a Record Date for Stockholder Meetings. In order that the corporation may determine the stockholders entitled to notice of or to vote at any meeting of stockholders or any adjournment thereof, the board of directors may fix a record date, which record date shall not precede the date upon which the resolution fixing the record date is adopted by the board of directors, and which record date shall not be more than sixty nor less than ten days before the date of such meeting. If no record date is fixed by the board of directors, the record date for determining stockholders entitled to notice of or to vote at a meeting of stockholders shall be the close of business on the next day preceding the day on which notice is given, or if notice is waived, at the close of business on the day next preceding the day on which the meeting is held. A determination of stockholders of record entitled to notice of or to vote at a meeting of stockholders shall apply to any adjournment of the meeting; provided that the board of directors may fix a new record date for the adjourned meeting.

Section 4 Fixing a Record Date for Action by Written Consent. In order that the corporation may determine the stockholders entitled to consent to corporate action in writing without a meeting, the board of directors may fix a record date, which record date shall not precede the date upon which the resolution fixing the record date is adopted by the board of directors, and which date shall not be more than ten days after the date upon which the resolution fixing the record date is adopted by the board of directors. If no record date has been fixed by the board of directors, the record date for determining stockholders entitled to consent to corporate action in writing without a meeting, when no prior action by the board of directors is required by statute, shall be the first date on which a signed written consent setting forth the action taken or proposed to be taken is delivered to the corporation by delivery to its registered office in the State of Delaware, its principal place of business, or an officer or agent of the corporation having custody of the book in which proceedings of meetings of stockholders are recorded. Delivery made to the corporation’s registered office shall be by hand or by certified or registered mail, return receipt requested. If no record date has been fixed by the board of directors and prior action by the board of directors is required by statute, the record date for determining stockholders entitled to consent to corporate action in writing without a meeting shall be at the close of business on the day on which the board of directors adopts the resolution taking such prior action.

Section 5 Fixing a Record Date for Other Purposes. In order that the corporation may determine the stockholders entitled to receive payment of any dividend or other distribution or allotment or any rights or the stockholders entitled to exercise any rights in respect of any change, conversion or exchange of stock, or for the purposes of any other lawful action, the board of directors may fix a record date, which record date shall not precede the date upon which the resolution fixing the record date is adopted, and which record date shall be not more than sixty days prior to such action. If no record date is fixed, the record date for determining stockholders for any such purpose shall be at the close of business on the day on which the board of directors adopts the resolution relating thereto.

Section 6 Registered Stockholders. Prior to the surrender to the corporation of the certificate or certificates for a share or shares of stock with a request to record the transfer of such share or shares, the corporation may treat the registered owner as the person entitled to receive dividends, to vote, to receive notifications, and otherwise to exercise all the rights and powers of an owner. The corporation shall not be bound to recognize any equitable or other claim to or interest in such share or shares on the part of any other person, whether or not it shall have express or other notice thereof.

Section 7 Subscriptions for Stock. Unless otherwise provided for in the subscription agreement, subscriptions for shares shall be paid in full at such time, or in such installments and at such times, as shall be determined by the board of directors. Any call made by the board of directors for payment on subscriptions shall be uniform as to all shares of the same class or as to all shares of the same series. In case of default in the payment of any installment or call when such payment is due, the corporation may proceed to collect the amount due in the same manner as any debt due the corporation.

ARTICLE VII

GENERAL PROVISIONS

Section 1 Dividends. Dividends upon the capital stock of the corporation, subject to the provisions of the certificate of incorporation, if any, may be declared by the board of directors at any regular or special meeting, pursuant to law. Dividends may be paid in cash, in property, or in shares of the capital stock, subject to the provisions of the certificate of incorporation. Before payment of any dividend, there may be set aside out of any funds of the corporation available for dividends such sum or sums as the directors from time to time, in their absolute discretion, think proper as a reserve or reserves to meet contingencies, or for equalizing dividends, or for repairing or maintaining any property of the corporation, or any other purpose and the directors may modify or abolish any such reserve in the manner in which it was created.

Section 2 Checks, Drafts or Orders. All checks, drafts, or other orders for the payment of money by or to the corporation and all notes and other evidences of indebtedness issued in the name of the corporation shall be signed by such officer or officers, agent or agents of the corporation, and in such manner, as shall be determined by resolution of the board of directors or a duly authorized committee thereof.

Section 3 Contracts. The board of directors may authorize any officer or officers, or any agent or agents, of the corporation to enter into any contract or to execute and deliver any instrument in the name of and on behalf of the corporation, and such authority may be general or confined to specific instances.

Section 4 Loans. The corporation may lend money to, or guarantee any obligation of, or otherwise assist any officer or other employee of the corporation or of its subsidiary, including any officer or employee who is a director of the corporation or its subsidiary, whenever, in the judgment of the directors, such loan, guaranty or assistance may reasonably be expected to benefit the corporation. The loan, guaranty or other assistance may be with or without interest, and may be unsecured, or secured in such manner as the board of directors shall approve, including, without limitation, a pledge of shares of stock of the corporation. Nothing in this section contained shall be deemed to deny, limit or restrict the powers of guaranty or warranty of the corporation at common law or under any statute.

Section 5 Fiscal Year. The fiscal year of the corporation shall be fixed by resolution of the board of directors.

Section 6 Corporate Seal. The board of directors shall provide a corporate seal which shall be in the form of a circle and shall have inscribed thereon the name of the corporation and the words “Corporate Seal, Delaware”. The seal may be used by causing it or a facsimile thereof to be impressed or affixed or reproduced or otherwise.

Section 7 Voting Securities Owned By Corporation. Voting securities in any other corporation held by the corporation shall be voted by the president, unless the board of directors specifically confers authority to vote with respect thereto, which authority may be general or confined to specific instances, upon some other person or officer. Any person authorized to vote securities shall have the power to appoint proxies, with general power of substitution.

Section 8 Inspection of Books and Records. Any stockholder of record, in person or by attorney or other agent, shall, upon written demand under oath stating the purpose thereof, have the right during the usual hours for business to inspect for any proper purpose the corporation’s stock ledger, a list of its stockholders, and its other books and records, and to make copies or extracts therefrom. A proper purpose shall mean any purpose reasonably related to such person’s interest as a stockholder. In every instance where an attorney or other agent shall be the person who seeks the right to inspection, the demand under oath shall be accompanied by a power of attorney or such other writing which authorizes the attorney or other agent to so act on behalf of the stockholder. The demand under oath shall be directed to the corporation at its registered office in the State of Delaware or at its principal place of business.

Section 9 Section Headings. Section headings in these by-laws are for convenience of reference only and shall not be given any substantive effect in limiting or otherwise construing any provision herein.

Section 10 Inconsistent Provisions. In the event that any provision of these by-laws is or becomes inconsistent with any provision of the certificate of incorporation, the General Corporation Law of the State of Delaware or any other applicable law, the provision of these by-laws shall not be given any effect to the extent of such inconsistency but shall otherwise be given full force and effect.

ARTICLE VIII

AMENDMENTS

These by-laws may be amended, altered, or repealed and new by-laws adopted at any meeting of the board of directors by a majority vote. The fact that the power to adopt, amend, alter, or repeal the by-laws has been conferred upon the board of directors shall not divest the stockholders of the same powers.

PROOFPOINT INC 8-K