Exhibit 3.1

SECOND AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

FATHOM DIGITAL MANUFACTURING CORPORATION

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ARTICLE ONE

The name of the corporation is Fathom Digital Manufacturing Corporation (the “Corporation”).

ARTICLE TWO

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

ARTICLE THREE

The nature and purpose of the business of the Corporation is to engage in any lawful act or activity for which corporations may be organized under the DGCL.

ARTICLE FOUR

Section 1. Authorized Shares. The total number of shares of all classes of capital stock which the Corporation shall have authority to issue is 1,001 shares, consisting of the following:

1.1 share of Preferred Stock, par value $0.0001 per share (the “Preferred Stock”);

2.1,000 shares of Common Stock, par value $0.0001 per share (the “Common Stock”);

The Preferred Stock and the Common Stock shall have the designations, rights, powers and preferences and the qualifications, restrictions and limitations thereof, if any, set forth below. The number of authorized shares of Common Stock or Preferred Stock may be increased or decreased (but not below the number of shares thereof then outstanding) by the approval of the Board of Directors of the Corporation (the “Board of Directors”) and by the affirmative vote of the holders of a majority in voting power of the then-outstanding shares of capital stock of the Corporation entitled to vote generally in an election of directors, and no vote of the holders of any of Common Stock or Preferred Stock voting separately as a class shall be required therefor, regardless of the provisions of Section 242(b)(2) of the DGCL (or any successor provisions thereto). No stockholder shall, by reason of the holding of shares of any class or series of capital stock of the Corporation, have any preemptive or preferential right to acquire or subscribe for any shares or securities of any class or series, whether now or hereafter authorized, which may at any time be issued, sold or offered for sale by the Corporation, unless specifically provided for in a Preferred Stock Designation (as hereinafter defined). The Corporation has the authority to create and issue rights, warrants and options entitling the holders thereof to acquire from the Corporation any shares of its capital stock of any class or classes, with such rights, warrants and options to be evidenced by or in instrument(s) approved by the Board of Directors. The Board of Directors is empowered to set the exercise price, duration, times for exercise and other terms and conditions of such rights, warrants or options. Notwithstanding the foregoing, the consideration to be received for any shares of capital stock issuable upon exercise thereof may not be less than the par value thereof. The Corporation shall at all times reserve and keep available out of its authorized but unissued shares of capital stock a number of shares of the class of capital stock issuable pursuant to any such rights, warrants and options outstanding from time to time.

Section 2. Preferred Stock. The Board of Directors is authorized, subject to limitations prescribed by law, to provide, by resolution or resolutions for the issuance of shares of Preferred Stock in one or more series, and with respect to each series, to establish the number of shares to be included in each such series, and to fix the voting powers (if any), designations, powers, preferences, and relative, participating, optional or other special rights, if any, of the shares of each such series, and any qualifications, restrictions or limitations thereof, as are stated and expressed herein and in the resolution or resolutions providing for the issue of such class or series adopted by the Board of Directors and included in a certificate or certificates of designation (each, a “Preferred Stock Designation”). The powers (including voting powers), preferences, and relative, participating, optional and other special rights of each series of Preferred Stock and the qualifications, restrictions or limitations thereof, if any, may differ from those of any and all other series at any time outstanding. Except as otherwise required by law, holders of a series of Preferred Stock, as such, shall be entitled only to such voting rights, if any, as shall expressly be granted thereto by this Second Amended and Restated Certificate of Incorporation (including any Preferred Stock Designation relating to such series).

Section 3. Common Stock.

(a) Except as otherwise provided by the DGCL or this Second Amended and Restated Certificate of Incorporation, and subject to the rights of holders of any series of Preferred Stock, all of the voting power of the stockholders of the Corporation shall be vested in the holders of the Common Stock. Each share of Common Stock shall entitle the holder thereof to one vote for each share held by such holder on all matters voted upon by the stockholders of the Corporation; provided, however, that, except as otherwise required by law, holders of Common Stock, as such, shall not be entitled to vote on any amendment to this Second Amended and Restated Certificate of Incorporation (including any Preferred Stock Designation relating to any series of Preferred Stock) that relates solely to the terms of one or more outstanding series of Preferred Stock if the holders of such affected series are entitled, either separately or together with the holders of one or more other such series, to vote thereon pursuant to this Second Amended and Restated Certificate of Incorporation (including any Preferred Stock Designation relating to any series of Preferred Stock) or pursuant to the DGCL.

(b) Except as otherwise required by law or expressly provided in this Second Amended and Restated Certificate of Incorporation, each share of Common Stock shall have the same powers, rights and privileges and shall rank equally, share ratably and be identical in all respects as to all matters.

(c) In the event of any voluntary or involuntary liquidation, dissolution or winding-up of the Corporation, after distribution in full of the preferential amounts, if any, to be distributed to the holders of shares of Preferred Stock or any series thereof, the holders of shares of Common Stock shall be entitled to receive all of the remaining assets of the Corporation available for distribution to its stockholders, ratably in proportion to the number of shares of Common Stock (as applicable) held by them. A dissolution, liquidation or winding-up of the Corporation, as such terms are used in this paragraph (c), shall not be deemed to be occasioned by or to include any consolidation or merger of the Corporation with or into any other corporation or corporations or other entity or a sale, lease, exchange or conveyance of all or a part of the assets of the Corporation.

(d) The Corporation may place customary restrictive legends on the certificates or book entries representing the shares of Common Stock and, if applicable, the shares of Preferred Stock subject to this Section 3(d) and remove such restrictive legends at the time the applicable restrictions under this Section 3(d) are no longer applicable to the shares of Common Stock or shares of Preferred Stock represented by such certificates or book entries. To the extent shares of Common Stock and, if applicable, shares of Preferred Stock subject to this Section 3(d) are uncertificated, the Corporation shall give notice of the restrictions set forth in this Section 3(d) in accordance with the DGCL.

ARTICLE FIVE

Section 1. Board of Directors. Except as otherwise provided in this Second Amended and Restated Certificate of Incorporation, the business and affairs of the Corporation shall be managed by or under the direction of the Board of Directors.

Section 2. Number of Directors. Subject to any rights of the holders of any class or series of Preferred Stock to elect additional directors under specified circumstances or otherwise, the number of directors which shall constitute the Board of Directors shall be fixed from time to time exclusively by resolution of the Board of Directors.

Section 3. Election and Term of Office. The directors shall be elected by a plurality of the votes cast. Each director shall hold office until the annual meeting of stockholders for the year in which such director’s term expires and a successor is duly elected and qualified or until his or her earlier death, resignation or removal. Nothing in this Second Amended and Restated Certificate of Incorporation shall preclude a director from serving consecutive terms. Elections of directors need not be by written ballot unless the Bylaws of the Corporation (as amended and/or restated, the “Bylaws”) shall so provide.

Section 4. Newly-Created Directorships and Vacancies. Subject to the rights of the holders of any series of Preferred Stock then outstanding, newly created directorships resulting from any increase in the authorized number of directors or any vacancies in the Board of Directors resulting from death, resignation, disqualification, removal from office or any other cause may be filled only by resolution of a majority of the directors then in office, although less than a quorum, or by a sole remaining director, and may not be filled in any other manner. A director elected or appointed to fill a vacancy shall serve for the unexpired term of his or her predecessor in office and until his or her successor is elected and qualified or until his or her earlier death, resignation or removal. A director elected or appointed to fill a position resulting from an increase in the number of directors shall hold office until the next election of the class for which such director shall have been elected or appointed and until his or her successor is elected and qualified, or until his or her earlier death, resignation or removal. No decrease in the authorized number of directors shall shorten the term of any incumbent director.

Section 5. Removal and Resignation of Directors. Subject to the rights of the holders of any series of Preferred Stock then outstanding and notwithstanding any other provision of this Second Amended and Restated Certificate of Incorporation, directors may be removed for any reason upon the affirmative vote of stockholders representing at least a majority of the voting power of the Common Stock. Any director may resign at any time upon notice in writing or by electronic transmission to the Corporation.

Section 6. Rights of Holders of Preferred Stock. Notwithstanding the provisions of this ARTICLE FIVE, whenever the holders of one or more series of Preferred Stock shall have the right, voting separately or together by 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 directorship shall be subject to the rights of such series of Preferred Stock. During any period when the holders of any series of Preferred Stock, voting separately as a series or together with one or more series, have the right to elect additional directors, then upon commencement and for the duration of the period during which such right continues: (i) the then otherwise total authorized number of directors of the Corporation shall automatically be increased by such specified number of directors, and the holders of such Preferred Stock shall be entitled to elect the additional directors so provided for or fixed pursuant to said provisions, and (ii) each such additional director shall serve until such director’s successor shall have been duly elected and qualified, or until such director’s right to hold such office terminates pursuant to said provisions, whichever occurs earlier, subject to his or her earlier death, resignation, disqualification or removal. Except as otherwise provided by the Board of Directors in the resolution or resolutions establishing such series and the related Preferred

Stock Designation, whenever the holders of any series of Preferred Stock having such right to elect additional directors are divested of such right pursuant to the provisions of such stock, the terms of office of all such additional directors elected by the holders of such stock, or elected to fill any vacancies resulting from the death, resignation, disqualification or removal of such additional directors, shall forthwith terminate (in which case each such director thereupon shall cease to be qualified as, and shall cease to be, a director) and the total authorized number of directors of the Corporation shall automatically be reduced accordingly.

Section 7. Quorum. A quorum for the transaction of business by the directors shall be set forth in the Bylaws.

ARTICLE SIX

Section 1. Limitation of Director and Officer Liability.

(a) To the fullest extent permitted by the DGCL as it now exists or may hereafter be amended (but, in the case of any such amendment, only to the extent such amendment permits the Corporation to provide broader exculpation than permitted prior thereto), no director or officer of the Corporation shall be liable to the Corporation or its stockholders for monetary damages arising from a breach of fiduciary duty as a director or officer.

(b) Any amendment, repeal or modification of the foregoing paragraph shall not adversely affect any right or protection of a director or officer of the Corporation existing at the time of such amendment, repeal or modification with respect to any act, omission or other matter occurring prior to such amendment, repeal or modification.

ARTICLE SEVEN

Section 1. Action by Written Consent. Any action which is required or permitted to be taken by the Corporation’s 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, is signed by the holders of outstanding Common 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 of the Corporation’s stock entitled to vote thereon were present and voted. Any action required or permitted to be taken by the holders of Preferred Stock, voting separately as a series or separately as a class with one or more other such series, may be taken without a meeting, without prior notice and without a vote, to the extent expressly so provided in the resolution or the resolutions and the related Preferred Stock Designation creating such series of Preferred Stock.

Section 2. Special Meetings of Stockholders. Subject to the rights of the holders of any series of Preferred Stock then outstanding and to the requirements of applicable law, special meetings of stockholders of the Corporation may be called only by the Chairman of the Board of Directors at the written request of the holders of a majority of the voting power of the then outstanding shares of Common Stock in the manner provided for in the Bylaws. Any business transacted at any special meeting of stockholders shall be limited to the purpose or purposes stated in the notice of the meeting.

ARTICLE EIGHT

Section 1. [Reserved].

ARTICLE NINE

Section 1. Section 203 of the DGCL. The Corporation expressly elects not to be subject to the provisions of Section 203 of the DGCL.

ARTICLE TEN

Section 1. Amendments to the Bylaws. Subject to the rights of holders of any series of Preferred Stock then outstanding, in furtherance and not in limitation of the powers conferred by law, the Bylaws may be amended, altered or repealed and new bylaws made by the Board of Directors.

Section 2. Amendments to this Second Amended and Restated Certificate of Incorporation. Subject to the rights of holders of any series of Preferred Stock then outstanding, any alteration, amendment, or repeal of this Second Amended and Restated Certificate of Incorporation may be adopted by the affirmative vote of stockholders representing at least a majority of the voting power of the Common Stock.

ARTICLE ELEVEN

Section 1. Exclusive Forum. Unless this Corporation consents in writing to the selection of an alternative forum, the Court of Chancery of the State of Delaware shall, to the fullest extent permitted by law, be the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Corporation, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director, officer, employee or stockholder of the Corporation to the Corporation or the Corporation’s stockholders, (iii) any action asserting a claim arising pursuant to any provision of the DGCL or as to which the DGCL confers jurisdiction on the Court of Chancery of the State of Delaware, this Second Amended and Restated Certificate of Incorporation or the Bylaws or (iv) any action asserting a claim governed by the internal affairs doctrine; provided that for the avoidance of doubt, this provision, including for any “derivative action,” will not apply to suits to enforce a duty or liability created by the Securities Act, the Exchange Act or any other claim for which the federal courts have exclusive jurisdiction. Unless the Corporation consents in writing to the selection of an alternative forum, the federal district courts of the United States of America shall, to the fullest extent permitted by law, be the sole and exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act of 1933, as amended. Failure to enforce the foregoing provisions would cause the Corporation irreparable harm and the Corporation shall be entitled to equitable relief, including injunctive relief and specific performance, to enforce the foregoing provisions. To the fullest extent permitted by law, any person purchasing or otherwise acquiring or holding any interest in shares of capital stock of the Corporation shall be deemed to have notice of and consented to the provisions of this ARTICLE ELEVEN.

Section 2. Notice. Any person purchasing or otherwise acquiring or holding any interest in shares of capital stock of the Corporation (including, without limitation, shares of Common Stock) shall be deemed to have notice of and to have consented to the provisions of this ARTICLE ELEVEN.

ARTICLE TWELVE

If any provision or provisions of this Second Amended and Restated Certificate of Incorporation shall be held to be invalid, illegal or unenforceable as applied to any circumstance for any reason whatsoever, the validity, legality and enforceability of such provisions in any other circumstance and of the remaining provisions of this Second Amended and Restated Certificate of Incorporation (including, without limitation, each portion of any paragraph of this Second Amended and Restated Certificate of Incorporation containing any such provision held to be invalid, illegal or unenforceable that is not itself held to be invalid, illegal or unenforceable) shall not, to the fullest extent permitted by applicable law, in any way be affected or impaired thereby.

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Fathom Digital Manufacturing Corp 8-K