April 28, 202329, 2024

Dear Fellow Stockholders:

In 2022,2023, we made significant progress in fulfilling our mission of digitizingto digitize one of the most-importantmost important industries in the world. Xometry’s growth initiatives drove record results with revenue of $463 million including 30% marketplace revenue growth in a period of contraction in US manufacturing. We continuedfurther expanded marketplace gross margin by 260 basis points to expand30.8% powered by our proprietary AI algorithms and enhancerapid expansion in our global online marketplace,active supplier network.

Concurrently, we made significant investments in product development and technology infrastructure. We now offer tools including Teamspace and Workcenter to digitize work for both buyers and suppliers as well as provide software and information for customers to improve decision making and increase efficiency.

We are rapidly expandedgaining market share and remain confident in our buyer and supplier networks and introduced new products and services for our customers.long-term growth initiatives:

Our AI-driven global marketplace is playing an instrumental role in helping buyers create locally resilient supply chains and manufacturers grow their businesses. The shift to digital, which has happened in so many other industries, is inevitable in custom manufacturing.

We are proud of what we accomplished in 2022,2023, and our team continues to work diligently to deliver comprehensive solutions that benefit buyers and suppliers.

We are pleased to invite you to attend the 20232024 Annual Meeting of Stockholders of Xometry, Inc., a Delaware corporation (“Xometry”) to be held virtually on June 20, 202318, 2024 at 11:00 a.m., Eastern Time. To provide expanded access from locations around the world and to lower costs, we are continuing with a virtual format for our 20232024 Annual Meeting, which will be held solely online via live webcast. There will not be a physical location for the Annual Meeting, and you will not be able to attend the Annual Meeting in person.

You will be able to attend the Annual Meeting, ask your questions and vote your shares during the meeting by visiting https://meetnow.global/M4TPYZLMYMZWX2 and entering the control number located on the Notice of Internet Availability of Proxy Materials for the 20232024 Annual Meeting of Stockholders, your proxy card or voting instruction form. Additional details regarding access to the Annual Meeting and the business to be conducted at the Annual Meeting are described in the accompanying Notice of 20232024 Annual Meeting of Stockholders and proxy statement. Please note that supported browsers include Chrome, MS Edge, Firefox and Safari.

We have elected to provide access to our proxy materials over the Internet under the U.S. Securities and Exchange Commission’s “notice and access” rules. As a result, we are mailing to our stockholders a Notice of Internet Availability of Proxy Materials instead of paper copies of the proxy statement and our 20222023 Annual Report. The notice contains instructions on how to access those documents over the Internet. The Notice of Internet Availability of Proxy Materials also contains instructions on how stockholders can receive a paper copy of our proxy materials, including the proxy statement, our 20222023 Annual Report and a form of proxy card or voting instruction form. We believe that providing our proxy materials over the Internet increases the ability of our stockholders to connect with the information they need, while reducing the environmental impact and cost of our Annual Meeting.

Your vote is important. Whether or not you plan to attend the Annual Meeting, we hope you will vote as soon as possible. You may vote over the Internet, by telephone or, if you receive a paper proxy card by mail, by completing and returning the proxy card or voting instruction form mailed to you. Please carefully review the instructions on each of your voting options described in this proxy statement, as well as in the Notice of Internet Availability of Proxy Materials you received in the mail.

On behalf of the Xometry Board of Directors and employees, we thank you for your continued support and look forward to speaking with you at the Annual Meeting.

Sincerely,

Randy Altschuler

Chief Executive Officer

XOMETRY, INC.

6116 Executive Boulevard

Suite 800

North Bethesda, Maryland 20852

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

TABLE OF CONTENTS

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GENERAL INFORMATION

XOMETRY, INC.

6116 Executive Boulevard

Suite 800

North Bethesda, Maryland 20852

QUESTIONS AND ANSWERS ABOUT THESE PROXY MATERIALS AND VOTING

Why did I receive a Notice of Internet Availability of Proxy Materials on the internet instead of a full set of Proxy Materials?

Pursuant to rules adopted by the Securities and Exchange Commission (the “SEC”), we have elected to provide access to our Proxy Materials (as defined below) over the Internet. Accordingly, we have sent you a Notice of Internet Availability because the Board of Directors of Xometry, Inc. (the “Board”) is soliciting your proxy to vote at the 20232024 Annual Meeting of Stockholders (the “Annual Meeting”) of Xometry, Inc., including at any adjournments or postponements thereof, to be held on Tuesday, June 20, 202318, 2024 at 11:00 a.m., Eastern Time. The Annual Meeting can be accessed by visiting https://meetnow.global/M4TPYZL MYMZWX2. Please note that supported browsers include Chrome, MS Edge, Firefox and Safari.

The Notice of 20232024 Annual Meeting of Stockholders (“Notice of Annual Meeting”), this proxy statement, the proxy card or voting instruction form, and our Annual Report on Form 10-K for the fiscal year ended December 31, 20222023 (the “Annual Report” and, together with the proxy statement and proxy card or voting instruction form, the “Proxy Materials”) are available to stockholders on the Internet.

The Notice of Internet Availability will provide instructions as to how a stockholder of record may access and review the Proxy Materials on the website referred to in the Notice of Internet Availability or, alternatively, how to request that a copy of the Proxy Materials, including a proxy card, be sent by mail or email to the stockholder of record. The Notice of Internet Availability will also provide voting instructions. Please note that, while our Proxy Materials are available at the website referenced in the Notice of Internet Availability, and our Notice of Annual Meeting, proxy statement and Annual Report are available on our website, no other information contained on either website is incorporated by reference in or considered to be a part of this document.

We intend to mail the Notice of Internet Availability on or about May 8, 20236, 2024 to all stockholders of record entitled to vote at the Annual Meeting. The Proxy Materials will be made available to stockholders on the Internet on the same date.

In this proxy statement, we refer to Xometry, Inc. as “Xometry,” “we” or “us.”

Will I receive any other Proxy Materials by mail?

You will not receive any additional Proxy Materials via mail unless you request a printed copy of the Proxy Materials in accordance with the instructions set forth in the Notice of Internet Availability.

When is the record date for the Annual Meeting?

The Board has fixed the record date for the Annual Meeting as of the close of business on April 26, 202324, 2024 (the “Record Date”).

How do I attend the Annual Meeting?

We will be hosting the Annual Meeting via live webcast only. You are entitled to attend the Annual Meeting if you were a stockholder as of the close of business on the Record Date, or if you hold a valid proxy for the meeting. There will not be a physical location for the Annual Meeting, and you will not be able to attend the Annual Meeting in person.

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The Annual Meeting will begin promptly at 11:00 a.m., Eastern Time, on Tuesday, June 20, 2023.18, 2024. To participate in the Annual Meeting, you will need to visit https://meetnow.global/M4TPYZLMYMZWX2 and enter the control number included on your Notice of Internet Availability, on your proxy card or on the instructions that accompanied your proxy materials, as applicable. If your shares are held by a broker, use the control number provided by your broker found on your notice or voting instruction form.

We recommend that you log in a few minutes before the Annual Meeting to ensure that you are logged in when the meeting starts. Please follow the registration instructions as outlined in this proxy statement. Information on how to vote online during the Annual Meeting is discussed below.

What do I do if I have technical difficulties in connection with the Annual Meeting?

We will have technicians ready to assist you with any technical difficulties you may have accessing the virtual Annual Meeting. If you encounter any difficulties accessing the virtual Annual Meeting during the check-in or meeting time, please call the technical support number that will be posted at https://meetnow.global/M4TPYZLMYMZWX2. Technical support will be available starting at 7:00 a.m., Eastern Time, on June 20, 2023.18, 2024.

How do I register to attend the Annual Meeting?

If you are a registered stockholder (i.e., you hold your shares through our transfer agent, Computershare Trust Company, N.A. (“Computershare”)), you do not need to register to attend the Annual Meeting. Please follow the instructions on the notice or proxy card that you received to join the Annual Meeting.

If you hold your shares through an intermediary, such as a bank or broker, you must register in advance to attend the Annual Meeting or to vote or ask questions during the Annual Meeting.

To register to attend the Annual Meeting you must submit proof of your proxy power (“Legal Proxy”) reflecting your holdings in our capital stock along with your name and email address to Computershare. Requests for registration must be labeled as “Legal Proxy” and be received no later than 5:00 p.m., Eastern Time, on June 15, 2023.13, 2024. You will receive a confirmation of your registration by email after we receive your registration materials.

Requests for registration should be directed to Computershare as follows:

How do I ask a question at the Annual Meeting?

Only stockholders of record as of the Record Date may submit questions or comments that may be addressed during the Annual Meeting. If you would like to submit a question, you may do so by going to https://meetnow.global/M4TPYZLMYMZWX2 and entering the control number included on your Notice of Internet Availability, on your proxy card or on the instructions that accompanied your proxy materials, as applicable. If your shares are held by a broker, use the control number provided by your broker found on your notice or voting instruction form.

In accordance with the rules of conduct, we ask that you limit your questions to questions that are relevant to the Annual Meeting or our business and that such questions are respectful of your fellow stockholders and

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grouped and answered once. In addition, questions may be ruled out of order if they are, among other things, irrelevant to our business, related to pending or threatened litigation, disorderly, repetitious of statements already made, or in furtherance of the stockholder’s own personal, political or business interests.

Will a list of record stockholders as of the record date be available?

A list of stockholders entitled to vote at the meeting will be available for examination during normal business hours by any stockholder for any purpose germane to the meeting for the ten days ending the day prior to the meeting at our offices. Please email legal@xometry.com to arrange for an in-person examination. The stockholder list will also be available electronically during the meeting.

Who can vote at the Annual Meeting?

Only stockholders of record at the close of business on the Record Date will be entitled to vote online during the Annual Meeting. On the Record Date, there were 45,167,42146,122,020 shares of Class A common stock and 2,676,154 shares of Class B common stock outstanding and entitled to vote.

Stockholder of Record: Shares Registered in Your Name

If, on the Record Date, your shares were registered directly in your name with Computershare, then you are a stockholder of record. As a stockholder of record, you may vote online during the meeting by going to https://meetnow.global/M4TPYZLMYMZWX2 and entering the control number included on your Notice of Internet Availability, on your proxy card or on the instructions that accompanied your proxy materials, as applicable. Whether or not you plan to attend the Annual Meeting, we urge you to vote by proxy to ensure your vote is counted.

Beneficial Owner: Shares Registered in the Name of a Broker, Bank or Similar Organization

If, on the Record Date, your shares were held, not in your name, but rather in an account at a brokerage firm, bank, dealer or other similar organization, then you are the beneficial owner of shares held in “street name” and the Notice of Internet Availability is beingshould be forwarded to you by that organization. The organization holding your account is considered to be the stockholder of record for purposes of voting at the Annual Meeting. As a beneficial owner, you have the right to direct your broker or other agent regarding how to vote the shares in your account. You are also invited to attend the Annual Meeting. However, since you are not the stockholder of record, you must follow the instructions provided by your brokerage firm, bank or other similar organization for your bank, broker or other stockholder of record to vote your shares per your instructions. Alternatively, many brokers and banks provide the means to grant proxies or otherwise instruct them to vote your shares by telephone and via the internet, including by providing you with a control number via email or on your notice or your voting instruction form. If your shares are held in an account with a broker, bank or other stockholder of record providing such a service, you may instruct them to vote your shares by telephone (by calling the number provided in the Proxy Materials) or over the internet as instructed by your broker, bank or other stockholder of record. If you did not receive a control number via email or on your notice or voting instruction form and you wish to vote prior to or at the virtual Annual Meeting, you must follow the instructions from your broker, bank or other stockholder of record, including any requirement to obtain a valid legal proxy. Many brokers, banks and other stockholders of record allow a beneficial owner to obtain a valid legal proxy either online or by mail, and we recommend you contact your broker, bank or other stockholder of record to do so. You may not vote your shares online during the meeting unless you request and obtain a valid proxy from your broker or other agent, as required.

What am I voting on?

There are fourthree matters scheduled for a vote:

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instruction form. If your shares are held in an account with a broker, bank or other stockholder of record providing such a service, you may instruct them to vote your shares by telephone (by calling the number provided in the Proxy Materials) or over the internet as instructed by your broker, bank or other stockholder of record. If you aredid not receive a control number via email or on your notice or voting instruction form, and you wish to vote prior to or at the virtual Annual Meeting, you must follow the instructions from your broker, bank or other stockholder of record, including any requirement to obtain your control number. Many brokers, banks and other stockholders of record allow a beneficial owner to obtain their control number either online or by mail, and would likewe recommend that you contact your broker, bank or other stockholder of record to vote online during the Annual Meeting you should follow the procedures outlined above.do so.

How many votes do I have?

Each holder of shares of our Class A common stock will have one vote per share of Class A common stock held as of the Record Date, and each holder of shares of our Class B common stock will have twenty votes per share of Class B common stock held as of the Record Date. The holders of the shares of our Class A common stock and Class B common stock will vote as a single class on all matters described in this proxy statement for which your vote is being solicited.

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interpretations, “non-routine” matters are matters that may substantially affect the rights or privileges of stockholders, such as mergers, stockholder proposals, elections of directors (even if not contested), executive compensation, and certain corporate governance proposals, even if management-supported. In this regard, Proposals 1 2 and 32 are considered to be “non-routine” under applicable rules, meaning your broker or nominee may not vote your shares on Proposals 1 2 or 32 without your instructions. Such an event would result in a “broker non-vote” and these shares will not be counted as having been voted for such proposals. However, Proposal 3 is considered to be a “routine” matter, meaning that if you do not return voting instructions to your broker or nominee by its deadline, your broker or nominee may vote your shares in its discretion on Proposal 4.3.

If you are a beneficial owner of shares held in street name, to ensure your shares are voted in the way you would prefer, you must provide voting instructions to your broker, bank or other agent by the deadline provided in the materials you receive from your broker, bank or other nominee.

What does it mean if I receive more than one Notice of Internet Availability?

If you receive more than one Notice of Internet Availability, your shares may be registered in more than one name or in different accounts. Please follow the voting instructions on each notice to ensure that all of your shares are voted.

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How are votes counted?

Votes will be counted by the inspector of election appointed for the Annual Meeting, who will separately count: (1) with respect to Proposal 1, votes “FOR,” “WITHHOLD” and broker non-votes, (2) with respect to Proposal 2, votes “FOR,” “AGAINST,” abstentions and broker non-votes, and (3) with respect to Proposal 3, votes for a frequency vote of “ONE”, “TWO”, or “THREE” years, abstentions and broker non-votes and (4) with respect to Proposal 4, votes “FOR,” “AGAINST” and abstentions. Abstentions will not be counted towards the vote total and have no effect on Proposals 2 3, and 4.3. Broker non-votes have no effect and will not be counted towards the vote total for Proposals 1 2 and 3.2.

What are “broker non-votes”?

As discussed above, broker non-votes occur when your broker submits a proxy for the meeting with respect to “routine” matters but does not vote on “non-routine” matters because you did not provide voting instructions on those matters. Proposals 1 2 and 32 are considered to be “non-routine,” and we therefore expect broker non-votes to exist only in connection with these proposals.

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on Form 8-K and, within four business days after the final voting results are known to us, file an amended Current Report on Form 8-K to disclose the final voting results.

Who pays the cost for soliciting proxies?

We will pay the entire cost of soliciting proxies. In addition to these Proxy Materials, our directors and employees may also solicit proxies in person, by telephone or by other means of communication. Directors and employees will not be paid any additional compensation for soliciting proxies. We will also reimburse brokers, banks, custodians, other nominees and fiduciaries for forwarding these materials to their principals to obtain the authorization for the execution of proxies.

When are stockholder proposals due for the 20242025 Annual Meeting of Stockholders?

If you wish to submit proposals for inclusion in our proxy statement for the 20242025 Annual Meeting of Stockholders (the “2024“2025 Annual Meeting”), we must receive them on or before December 30, 2023.2024. Nothing in this paragraph shall require us to include in our proxy statement or proxy card for the 20242025 Annual Meeting any stockholder proposal that does not meet the requirements of the SEC in effect at the time. Any such proposal will be subject to Rule 14a-8 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). In addition, stockholders who intend to solicit proxies in support of director nominees other than our nominees must also comply with the additional requirements of Rule 14a-19(b) of the Exchange Act.

If you wish to nominate a director or submit a proposal for presentation at the 20242025 Annual Meeting, without including such proposal in next year’s proxy statement, you must be a stockholder of record and provide timely notice in writing to our Secretary at Xometry, Inc., 6116 Executive Boulevard, Suite 800, North Bethesda, Maryland 20852. To be timely, we must receive the notice not less than 90 days nor more than 120 days prior to the first anniversary of the Annual Meeting, that is, between February 21, 202418, 2025 and March 22, 2024;20, 2025; provided, however, that in the event that the date of the 20242025 Annual Meeting is more than 30 days before or more than 30 days after such anniversary date, we must receive your notice (a) no earlier than the close of business on the 120th day prior to the 20242025 Annual Meeting and (b) no later than the close of business on the later of the 90th day prior to the 20242025 Annual Meeting or the close of business on the 10th day following the day on which we first make a public announcement of the date of the 20242025 Annual Meeting. Your written notice must contain specific information required in Section 5 of our amended and restated bylaws (the “Bylaws”). For additional information about our director nomination requirements, please see our Bylaws.

Who should I call if I have any additional questions?

If you are the stockholder of record for your shares, please call Shawn Milne, our Vice President of Investor Relations, at 240.335.8132 or email shawn.milne@xometry.com. If your shares are held in street name, please contact the telephone number provided on your voting instruction form or contact your broker or nominee holder directly.

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PROPOSAL 1: ELECTION OF DIRECTORS

General

Our Board is currently composed of eightseven directors and is divided into three classes. Each class consists, as nearly as possible, of one-third of the total number of directors and has a three-year term. At each annual meeting of stockholders, the successors to directors whose terms then expire will be elected to serve from the time of election until the third annual meeting following the election.

Our directors are divided into three classes as follows:

On April 8, 2024, Mr. Zuriff notified the Board that he will not stand for reelection as a director of Xometry upon expiration of his current term at the Annual Meeting due to health reasons, and not as a result of any disagreement between Mr. Zuriff and Xometry, its management, our Board (or any committee thereof), or with respect to any matter relating to our operations, policies or practices. Upon the recommendation of the Nominating and Corporate Governance Committee, our Board has nominated Mses. Clark and Rollins for election as directors at the Annual Meeting. Effective upon the expiration of Mr. Zuriff’s term at the Annual Meeting, the Board has reduced the size of the Board from seven to six directors.

Any additional directorships resulting from an increase in the number of directors will be distributed among the three classes so that, as nearly as possible, each class will consist of one-third of the directors. Vacancies on the Board may be filled only by persons elected by a majority of the remaining directors. A director elected by the Board to fill a vacancy in a class, including vacancies created by an increase in the number of directors, shall serve for the remainder of the full term of that class and until the director’s successor is duly elected and qualified. The division of our board of directors into three classes with staggered three-year terms may delay or prevent a change of our management or a change in control of our company.

Each of Mr. Hornig, Mr. RosatiMses. Clark and Ms. WeymouthRollins is currently a member of our Board. Mr. Hornig and Ms. Weymouth were previously elected toClark was appointed by the Board byin July 2021 effective immediately upon the stockholders prior toconsummation of our initial public offering (“IPO”) of Class A common stock. Mr. RosatiMs. Rollins was appointedpreviously elected to the Board by the Boardstockholders in March 2021 prior to our IPO to fill a vacancy on the Board. Each of these nominees hasMses. Clark and Rollins have been nominated for reelection to serve as a Class IIIII director, based in part on the recommendation of the Nominating and Corporate Governance Committee, and had agreed to be named in this proxy statement and stand for reelection at the Annual Meeting. Our management has no reason to believe that any nominee will be unable to serve. If elected at the Annual Meeting, each of these nominees would serve until the Annual Meeting of Stockholders to be held in 20262027 and until the director’s successor has been duly elected, or if sooner, until the director’s death, resignation or removal.

Vote Required

Directors are elected by a plurality of the votes of the holders of shares present or represented by proxy and entitled to vote on the election of directors. Accordingly, the threetwo nominees receiving the highest number of “FOR” votes will be elected. You may not vote your shares cumulatively for the election of directors. Shares represented by executed proxies will be voted, if authority to do so is not withheld, for the election of the threetwo nominees named above. If any nominee becomes unavailable for election as a result of an unexpected

occurrence, your shares will be voted for the election of a substitute nominee proposed by our Board. The Board

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has no reason to believe that any of the nominees would prove unable to serve if elected. There are no arrangements or understandings between us and any nominee for directorship, pursuant to which such person was selected as a nominee.

The biographies below under “Information Regarding Director Nominees and Current Directors” include information, as of the date of this proxy statement, regarding the specific and particular experience, qualifications, attributes or skills of each director nominee that led the Nominating and Corporate Governance Committee to believe that the nominee should continue to serve on the Board. However, each of the members of

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INFORMATION ABOUT OUR DIRECTOR NOMINEES AND CURRENT DIRECTORS

The following table sets forth, for the Class IIIII nominees and our other directors who will continue in office after the Annual Meeting, their ages and position or office held with us as of the date of this proxy statement.

Set forth below is biographical information for the director nominees and each person whose term of office as a director will continue after the Annual Meeting. This includes information regarding each director’s experience, qualifications, attributes or skills that led the Board to recommend them for board service.

Nominees for Election at the 2023 Annual Meeting of Stockholders

George Hornighas served as a member of our Board since October 2013 and as chair of our board of directors since March 2021. Mr. Hornig serves as the Managing Partner and is a co-founder of The Seed Lab, an entrepreneur-led early-stage venture fund, a position he has held since November 2018. Mr. Hornig served as the Senior Managing Director and Chief Operating Officer of PineBridge Investments, a private, global asset manager, from November 2010 to December 2016. Mr. Hornig currently serves as the co-chair of the board of directors of Healthwell Acquisition Corp. I and as a member of the board of directors of Vaxxinity, Inc., positions he has held since July 2021 and January 2022, respectively. Mr. Hornig served as chair of the board of directors of KBL Merger Corp. IV from April 2017 to August 2020. From November 1996 to May 2018, he also served on the board of directors of Forrester Research and as chair of its audit committee. Mr. Hornig received an A.B. in Economics from Harvard University, a J.D. from Harvard Law School and an M.B.A from Harvard Business School.

Fabio Rosatihas served as a member of our Board since December 2017. Mr. Rosati is the Executive Chairman of Snagajob, a marketplace platform for connecting businesses with hourly workers, a position he has held since June 2019. He has been a member of the board of directors of Snagajob since 2017 and held the position of Chairman and acting CEO from July 2018 to May 2019. From May 2015 to July 2017 he served on the board of directors of Upwork, a position he held after serving as CEO from January 2014 to April 2015. Mr. Rosati is a board member of Smith.ai. Mr. Rosati received a B.S. in Finance and Accounting from Georgetown University.

Katharine Weymouthhas served as a member of our Board since October 2020. Since September 2021, Ms. Weymouth has served as the Chief Operating Officer at Shine Together (formerly known as FamilyCare), a start-up in the mental health space. Ms. Weymouth previously served as a senior advisor to ChefMarket (formerly DineXpert), a platform helping independent restaurants and food businesses source high quality products, and previously served as its Chief Operating Officer and President from June 2017 until May 2021.

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Directors Continuing in Office until the 2026 Annual Meeting of Stockholders

Laurence ZuriffFabio Rosati is our co-founder, served as our Chief Strategy Officer from April 2020 until March 2023, currently manages our donor advised fund and environmental, social and governance activities, and has served as a member of our Board since December 2017 and as chair of our Board since December 2023. Mr. Rosati served on the board of directors from 2017 through November 2023 at Snagajob, a marketplace platform for connecting businesses with hourly workers. At Snagajob Mr. Rosati was Chair of the Board from November 2022 through November 2023, Executive Chairman from June 2019 through October 2022, and Chairman and acting CEO from July 2018 to May 2013. He also previously2019. From May 2015 to July 2017 he served on the board of directors of Upwork, a position he held after serving as our Chief Financial OfficerCEO from September 2013January 2014 to April 2020. Prior to co-founding Xometry,2015. Mr. Zuriff was the managing partner at Granite Capital International Group. Prior to Granite, Mr. Zuriff was a managing director and technology analyst at Weiss, Peck & Greer. Mr. Zuriff began his career as an analyst at Science Applications International Corporation and in the Office of Net Assessment at the Department of Defense. Mr. ZuriffRosati is a board member of Smith.ai. Mr. Rosati received a B.S. in Finance and chairsAccounting from Georgetown University. We believe that Mr. Rosati is qualified to serve on the audit committeeBoard because of his experience in the technology space.

Katharine Weymouthhas served as a member of our Board since October 2020. Since September 2021, Ms. Weymouth has served as the Chief Operating Officer at Shine Together (formerly known as FamilyCare), a start-up in the mental health space. Ms. Weymouth previously served as a senior advisor to ChefMarket (formerly DineXpert), a platform helping independent restaurants and food businesses source high quality products, and previously served as its Chief Operating Officer and President from June 2017 until May 2021. Ms. Weymouth was the Publisher and Chief Executive Officer of the Washington-based Center for StrategicWashington Post from February 2008 to September 2014. Since January 2015, Ms. Weymouth has served as a Trustee of the Philip L Graham Fund and Budgetary Analysis. Mr. Zuriffthe Greater Washington Community Foundation. Ms. Weymouth is a board member of Republic Services, Inc, Cable One, Inc., Sequoia Mutual Fund, Inc., and The Graham Holdings Company. Ms. Weymouth received a B.A. in International RelationsEnglish Literature from BrownHarvard University and an M.A. in Strategic Studiesa J.D. from Stanford Law School. We believe that Ms. Weymouth is qualified to serve on the Board because of her extensive executive and Economics from The John Hopkins University.public company board experience.

Directors Continuing in Office until the 2025 Annual Meeting of Stockholders

Randolph Altschuler is our co-founder and has served as our Chief Executive Officer and as a member of our Board since May 2013. Prior to co-founding Xometry, Mr. Altschuler served as the co-founder and Executive Chairman of CloudBlue Technologies, Inc., a provider of recycling services for electronic equipment, from January 2008 to September 2013. Prior to CloudBlue, Mr. Altschuler was the co-founder and Co-Chief Executive Officer of OfficeTiger, Inc., a global business process outsourcing company, from 2000 to 2007. Mr. Altschuler received a B.A. from Princeton University and an M.B.A. from Harvard Business School. Mr. Altschuler was awarded a Fulbright Scholarship and studied at the University of Vienna in Austria. We believe that Mr. Altschuler is qualified to serve on the Board because of his experience building and leading our business since inception.

Deborah Bial has served as a member of our board of directors since October 2020. Ms. Bial is the founder and president of the Posse Foundation, a diversity, leadership development and college success organization, a

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The table below provides additional diversity information regarding our board of directors as of April 28, 2023.2024. Each of the categories listed in the below table has the meaning as it is used in Nasdaq Listing Rule 5605(f).

Our Board Diversity Matrix as of May 2, 2022April 28, 2023 can be found in our proxy statement for the 20222023 Annual Meeting, filed with the SEC on May 2, 2022.April 28, 2023.

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INFORMATION REGARDING THE BOARD AND CORPORATE GOVERNANCE

Board Independence

As required under The Nasdaq Stock Market (“Nasdaq”) listing standards, a majority of the members of a listed company’s Board must qualify as “independent,” as affirmatively determined by the Board. The Board consults with our counsel to ensure that the Board’s determinations are consistent with relevant securities and other laws and regulations regarding the definition of “independent,” including those set forth in pertinent listing standards of Nasdaq, as in effect from time to time.

Based on information provided by each director concerning such director’s background, employment, affiliations, all relevant identified transactions or relationships between each director or any of such director’s family members, and Xometry, our senior management and our independent auditors, the Board has affirmatively determined that Mses. Bial, Clark, Rollins and Weymouth and Mr. Rosati are “independent” in accordance with the Nasdaq listing standards applicable to boards of directors in general, and George Hornig, who left our board in December 2023 was “independent” during the period he served on the Board during 2023. The Board also determined that each member of our Audit, Compensation and Nominating and Corporate Governance Committees satisfies the independence standards for such committees established by the SEC and the Nasdaq listing standards, as applicable.

In making this determination, the Board found that none of ourthese current directors or former directors who served on our Board in 2022, other than Mr. Altschuler and Mr. Zuriff, by virtue of their respective positions as Chief Executive Officer and Managing Director of our Donor Advised Fund and shared status as our co-founders, has or had any relationships that would interfere with the exercise of independent judgment in carrying out the responsibilities of a director, and that each of these directors is “independent” as that term is defined under the Nasdaq listing standards. In making these determinations, our Board consideredtaking into account the current and prior relationships that each non-employee director has with us and all other facts and circumstances our Board deemed relevant in determining their independence, including the beneficial ownership of our shares by each non-employee director and the transactions described in the section titled “Transactions with Related Persons.” The Board also determined that each memberMessrs. Altschuler and Zuriff, by virtue of their respective positions as Chief Executive Officer and Managing Director of our Audit, CompensationDonor Advised Fund and Nominating and Corporate Governance Committees satisfies the independence standards for such committees established by the SEC andshared status as our co-founders, are not “independent” under the Nasdaq listing standards, as applicable.standards.

Board Leadership Structure

The Board has an independent chair, Mr. Rosati (and Mr. Hornig before he left the Board in December 2023), who has authority, among other things, to call and preside over Board meetings, including meetings of the independent directors, to set meeting agendas and to determine materials to be distributed to the Board. Accordingly, the Board chair has substantial ability to shape the work of the Board. We believe that separation of the positions of Board chair and Chief Executive Officer reinforces the independence of the Board in its oversight of our business and affairs. In addition, we believe that having an independent Board chair creates an environment that is more conducive to objective evaluation and oversight of management’s performance, increasing management accountability and improving the ability of the Board to monitor whether management’s actions are in the best interests of Xometry and our stockholders. As a result, we believe that having an independent Board chair can enhance the effectiveness of the Board as a whole.

Our Corporate Governance Guidelines specify that the Board will select our Chief Executive Officer and chairperson of the Board in the manner that it determines to be in the best interests of our stockholders and in accordance with any stockholder agreements. The Board does not believe there should be a fixed rule regarding the positions of Chief Executive Officer and chairperson being held by different individuals, or whether the chairperson should be a Xometry employee or should be elected from among the non-employee directors. The needs of Xometry and the individuals available to assume these roles may require different outcomes at different times, and the Board believes that retaining flexibility in these decisions is in the best interests of Xometry.

Role of the Board in Risk Oversight

One of the Board’s key functions is informed oversight of our risk management process. The Board does not have a standing risk management committee, but rather administers this oversight function directly through the

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Board as a whole, as well as through various Board standing committees that address risks inherent in their respective areas of oversight. In particular, our Board is responsible for monitoring and assessing strategic risk exposure, including a determination of the nature and level of risk appropriate for our company.

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Board Committees

Our Board has established an Audit Committee, a Compensation Committee, and a Nominating and Corporate Governance Committee, and an Environmental and Social Governance Committee. The following table provides committee membership as of the date of this proxy statement and meeting information for 2022 for each of the committees:standing committees of the Board:

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Report of the Audit Committee

The primary purpose of the Audit Committee is to oversee Xometry’s financial reporting processes on behalf of the Board. The Audit Committee’s functions are more fully described in its charter, which is available in the Corporate Governance section of Xometry’s website. Management has the primary responsibility for Xometry’s financial statements and reporting processes, including Xometry’s systems of internal controls.

The Audit Committee has reviewed and discussed the audited financial statements as of and for the fiscal year ended December 31, 20222023 with management of Xometry. The Audit Committee has discussed with the independent registered public accounting firm the matters required to be discussed by the applicable requirements of the Public Company Accounting Oversight Board (“PCAOB”) and the SEC. The Audit Committee has also received the written disclosures and the letter from the independent registered public accounting firm required by

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Compensation Committee Processes and Procedures

Typically, the Compensation Committee meets quarterly and with greater frequency if necessary. The agenda for each meeting is usually developed by the Chair of the Compensation Committee, in consultation with our Chief Executive Officer and our Chief People Officer. The Compensation Committee meets regularly in executive session. However, from time to time, various members of management and other employees as well as outside advisers or consultants may be invited by the Compensation Committee to make presentations, to provide financial or other background information or advice or to otherwise participate in Compensation Committee meetings. The Chief Executive Officer may not participate in, or be present during, any deliberations or determinations of the Compensation Committee regarding his compensation or individual performance objectives. The charter of the Compensation Committee grants the Compensation Committee full access to all

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Nominating and Corporate Governance Committee

Our Nominating and Corporate Governance Committee consists of Deborah Bial, Ranjana Clark, Fabio Rosati and Katharine Weymouth, with Ms. Weymouth serving as Chair of the committee.

The primary purpose of the Nominating and Corporate Governance Committee is to discharge the responsibilities of our board of directors with respect to our corporate governance functions and to identify, communicate with, evaluate and recommend candidates for our Board. Specific responsibilities of our Nominating and Corporate Governance Committee include:

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after considering the function and needs of the Board. The Nominating and Corporate Governance Committee meets to discuss and consider the candidates’ qualifications and then selects a nominee for recommendation to the Board by majority vote. The Nominating and Corporate Governance Committee may gather information about the candidates through interviews, questionnaires, background checks or any other means that the Nominating and Corporate Governance Committee deems to be appropriate in the evaluation process. We have no formal policy regarding board diversity. Our Nominating and Corporate Governance Committee’s priority in selecting board members is identification of persons who will further the interests of our CompanyXometry through his or her established record of professional accomplishment, the ability to contribute positively to the collaborative culture among board members, professional and personal experiences and expertise relevant to our growth strategy.

The Nominating and Corporate Governance Committee will consider director candidates recommended by stockholders. The Nominating and Corporate Governance Committee does not intend to alter the manner in which it evaluates candidates, including the minimum criteria set forth above, based on whether or not the

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that exempt any principal executive officer, principal financial officer, principal accounting officer or controller, persons performing similar functions or our directors from provisions in the Code of Business Conduct and Ethics. Information contained on, or that can be accessed through, our website is not incorporated by reference into this proxy statement, and you should not consider information on our website to be part of this proxy statement.

Corporate Governance Guidelines

The Board has adopted Corporate Governance Guidelines to assure that the Board will have the necessary authority and practices in place to review and evaluate our business operations as needed and to make decisions that are independent of our management. The guidelines are also intended to align the interests of directors and management with those of our stockholders. The Corporate Governance Guidelines set forth the practices the Board intends to follow with respect to, among other things, board composition and selection including diversity, board meetings and involvement of senior management, Chief Executive Officer performance evaluation and succession planning, and board committees and compensation. The Corporate Governance Guidelines are available in the “Investors–Corporate Governance” section of our website at www.xometry.com.

Stockholder Communications with the Board

Stockholders wishing to communicate with the Board or an individual director may send a written communication to the Board or such director c/o Xometry, Inc., 6116 Executive Boulevard, Suite 800, North Bethesda, Maryland 20852, Attn: Secretary. The Secretary will review each communication and will forward such communication to the Board or to any individual director to whom the communication is addressed unless the communication contains advertisements or solicitations or is unduly hostile, threatening or similarly inappropriate, in which case the Secretary shall discard the communication or inform the proper authorities, as may be appropriate.

Hedging Policy

Our Board has adopted an insider trading policy that, among other things, prohibits our employees, directors, other applicable members of management and designated consultants from engaging in “hedging” or other monetization transactions with respect to our common stock, including through the use of financial instruments such as prepaid variable forwards, equity swaps, collars and exchange funds. In addition, our insider trading policy prohibits trading in derivative securities related to our common stock, which include publicly traded call and put options, engaging in short selling of our common stock, purchasing our common stock on margin or holding it in a margin account and pledging our common stock as collateral for a loan.

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PROPOSAL 2: ADVISORY VOTE ON EXECUTIVE COMPENSATION

Under the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”) and Section 14A of the Exchange Act, our stockholders are entitled to vote to approve, on an advisory basis, the compensation of our named executive officers as disclosed in this proxy statement under “Executive Compensation—Compensation Discussion and Analysis,” the tables included under the heading “Executive Compensation” and the accompanying narrative discussion.

This vote is not intended to address any specific item of compensation, but rather the overall compensation of our named executive officers and the philosophy, policies and practices described in this proxy statement. The compensation of our named executive officers subject to the vote is disclosed in the compensation tables and the related narrative disclosures that accompany the compensation tables contained in the “Executive Compensation” section in this proxy statement. As discussed in those disclosures, we believe that our compensation policies and decisions are strongly aligned with our stockholders’ interests and consistent with current market practices. Compensation of our named executive officers is designed to enable us to attract and retain talented and experienced executives to lead us successfully in a competitive environment.

Accordingly, the Board is asking the stockholders to indicate their support for the compensation of our named executive officers as described in this proxy statement by casting a non-binding advisory vote “FOR” the following resolution:

“RESOLVED, that the compensation paid to the named executive officers of Xometry, Inc., as disclosed pursuant to Item 402 of Regulation S-K, including the Compensation Discussion and Analysis, compensation tables and narrative discussion, is hereby APPROVED.”

Because the vote is advisory, it is not binding on the Board or the Compensation Committee. Nevertheless, the views expressed by the stockholders, whether through this vote or otherwise, are important to management and the Board and, accordingly, the Board and the Compensation Committee intend to consider the results of this vote in making determinations in the future regarding executive compensation arrangements.

Vote Required

Advisory approval of this proposal requires the vote of the holders of a majority of the voting power of the shares present in person, by remote communication, if applicable, or represented by proxy duly authorized at the meeting and voting affirmatively or negatively (excluding abstentions and broker non-votes) on such matter at the Annual Meeting.

Our Recommendation

THE BOARD UNANIMOUSLY RECOMMENDS A VOTE “FOR” THE APPROVAL OF THE NON-BINDING RESOLUTION ON NAMED EXECUTIVE OFFICER COMPENSATION.

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EXECUTIVE OFFICERS

The following table sets forth, for our executive officers, their ages and positions held with us as of the date of this proxy statement:

Biographical information for Mr. Altschuler is included above with the director biographies under the caption “Information about Our Director Nominees and Current Directors.”

Bill Cronin has served as our Chief Revenue Office since September 2018, and served as our Senior Vice President of Sales and Marketing since February 2016. Prior to joining Xometry, Mr. Cronin served as the Vice President of Marketing for WeddingWire, a global marketplace for wedding professionals, from November 2013 to January 2016. Mr. Cronin previously was the Vice President of Marketing for USA Today and held a range of roles at Mastercard over 12 years including Vice President of Global Brand Building. Mr. Cronin received a B.A. from Dartmouth College.

Peter Goguen has served as our Chief Operating Officer since March 2018. Prior to joining Xometry, Mr. Goguen served as the Executive Director of New Business Development and Launch for Detroit Manufacturing Systems LLC, a provider of high-quality vehicle interior components, from April 2015 to October 2018. Prior to that position, Mr. Goguen spent 28 years at Magna International, a Canadian mobility technology company, including most recently as Vice President of Operation from October 2010 to January 2014. Mr. Goguen received a B.S. in Mechanical Engineering from Queen’s University in Canada.

Matthew Leibel has served as our Chief Technology Officer since September 2022. Mr. Leibel initially joined Xometry in June 2019, serving as our Senior Vice President of Technology until his promotion to Chief Technology Officer. Prior to Xometry, Mr. Leibel served as Senior Director of Engineering at Vistaprint from December 2014 to June 2019, and earlier held roles in product, design and software development for various technology companies, including Resonate Networks, Plateau Systems, TechTrader and Electronic Data Systems among others. Mr. Leibel received a B.A. in History from George Mason University and an M.I.T.M.S. in Information Technology from Virginia Polytechnic Institute and State University.

Kathy Mayerhofer has served as our Chief Sales Officer since February 2020, and previously served as our Senior Vice President of Sales from March 2017 to February 2020. Prior to joining Xometry, Ms. Mayerhofer served as the Director of Sales for Protolabs, a provider of rapid manufacturing of low-volume 3D printing, from April 2011 to May 2016. Ms. Mayerhofer received a B.A. in Business and Communications from St. Cloud State University.

James RalloMiln has served as our Chief Financial Officer since April 2020.March 2024. Prior to joining Xometry, Mr. RalloMiln served in various roles at Yelp Inc. (“Yelp”) from February 2019 to February 2024, including most recently as its Senior Vice President, Finance and Investor Relations from January 2021 to February 2024. Mr. Miln also served as theYelp’s Vice President, Financial Planning and Analysis, from February 2019 to January 2021, and as Yelp’s Interim Chief Financial Officer of Liquidity Services, a network of e-commerce marketplaces, from September 2019 to February 20052020. Prior to April 2019. Between roles at Liquidity Services and Xometry,joining Yelp, Mr. Rallo brieflyMiln served as Chief Financial Officer of Stimwave Technologies LLC, a medical device company.Senior Director, Investor Relations at eBay Inc. from August 2017 to January 2019. From May 2011 to July 2017, Mr. RalloMiln held various positions at Yahoo Inc., including Senior Finance Director, Global Product Group (May 2011 to May 2012); Senior Finance Director, Global Revenue Planning, Reporting & Analysis (June 2012 to June 2014); and Senior Director, Investor Relations (July 2014 to July 2017, serving as department head from October 2016 to July 2017). Mr. Miln also served in various roles in Yahoo Inc.’s European business from 2007 until April 2011. Mr. Miln is a Certified PublicChartered Management Accountant (ACMA, CGMA), holds the Investor Relations Charter and receivedearned a B.S.B.A. in Business and AccountingClassics from Washington and LeeCambridge University, and an M.B.A. from the University of Maryland College Park.England.

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EXECUTIVE COMPENSATION

Compensation Discussion and Analysis

Overview

We became a public company in July 2021, and we ceased to be an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act, as of December 31, 2022. This proxy statement, therefore, includes detail regarding executive compensation that would not have been required had we continued to be an emerging growth company, including (i) this Compensation Discussion and Analysis, (ii) the additional compensation tables titled “Grants of Plan-Based Awards,” “Option Exercises and Stock Vested,” and “Potential Payments upon Termination or Change in Control,” and (iii) advisory votes on the compensation of our named executive officers and the preferred frequency of future advisory votes on the compensation of our named executive officers, which are included as Proposals 2 and 3 in this proxy statement.

This Compensation Discussion and Analysis section discusses our executive compensation policies and how and why the Compensation Committee arrived at specific compensation decisions for the year ended December 31, 20222023 for the individuals who served as our principal executive officer and principal financial officer and our three other most highly-compensated executive officers as of December 31, 2022,2023, collectively referred to as our “named executive officers”:

Mr. Rallo retired as our Chief Financial Officer, effective as of March 1, 2024. The Board appointed James Miln to serve as our Chief Financial Officer, principal financial officer and principal accounting officer, effective as of March 1, 2024. Mr. Rallo will continue serving as an employee for a period of up to 60 days following the effective date of his cessation of service as Chief Financial Officer to assist in the transition to Mr. Miln. Such cessation of service is considered a severance-eligible termination under Mr. Rallo’s employment agreement, and following the conclusion of the transition period, Mr. Rallo will receive severance benefits in accordance with his employment agreement; please see “Potential Payments Upon Termination or Change in Control” below for more information.

Business Highlights

Our Business

We are a global online marketplace connecting buyers with suppliers of manufacturing services, transforming one of the largest industries in the world. We use our proprietary technology to create a marketplace that enables buyers to efficiently source manufactured parts and assemblies, and empower suppliers of manufacturing services to grow their businesses.

Our AI-enabled technology platform is powered by proprietary machine learning algorithms and a dataset, resulting in a sophisticated marketplace for manufacturing. As a result, buyers can procure the products they want on demand and suppliers can source new manufacturing opportunities that match their specific processes and capacity. Interactions on our platform provide rich data insights that allow us to continuously improve our AI models and innovate new products and services, fueling powerful network effects as we scale.

20222023 Financial Highlights

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To supplement our consolidated financial statements, which are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”), we provide investors with certain non-GAAP financial measures, including Adjusted EBITDA. For a full reconciliation of Adjusted EBITDA to net loss, the most directly comparable financial measure stated in accordance with GAAP, please see the section titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Key Operational and Business Metrics” in our Annual Report on Form 10-K filed with the SEC on March 16, 2023.February 29, 2024.

Compensation Program Objectives, Philosophy and Elements of Compensation

The main objectives of our executive compensation program are to:

We believe that our executive compensation program accomplishes the following:

interests of Xometry and our stockholders. To achieve our compensation objectives, we have historically provided our executive officers, including our named executive officers, with a compensation package consisting of the following elements:

In evaluating our executive compensation policies and programs, as well as the short- and long-term value of our executive compensation plans, the Compensation Committee considers both the performance and skills of each of our executives, as well as the compensation paid to executives in similar companies with similar responsibilities. We focus on providing a competitive compensation package which provides significant short- and long-term incentives for the achievement of measurable corporate objectives. We believe that this approach provides an appropriate blend of short- and long-term incentives to maximize stockholder value.

We do not have any formal policies for allocating compensation among salary, performanceannual performance-based cash bonus awards and equity grants, short- and long-term compensation, or among cash and non-cash compensation. Instead, the Compensation Committee uses market benchmarks as a starting point to establish a total compensation program for each executive that isconsists of a mix of current, short-term incentive and long-term incentive compensation and cash and non-cash compensation that it believes appropriate to achieve the goalsobjectives of our executive compensation program and our corporate objectives. However,program. Further, a significant portion of each executive’s total target compensation consists of company performance-based bonus opportunities and long-term equity awards in order to align our executive officers’ incentives with the interests of our stockholders and the achievement of our corporate goals.

In making executive compensation decisions, the Compensation Committee generally considers each executive officer’s total target direct compensation, which consists of base salary, target bonus opportunity (which, together with base salary, we refer to as target cash compensation) and long-term equity awards (valued based on an approximation of grant date fair value).

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How We Determine Executive Compensation

Role of Our Compensation Committee, Management and the Board

Our Compensation Committee is appointed by the Board to assist with the Board’s oversight responsibilities with respect to our compensation and benefit plans, policies and programs, administration of our equity plans and the Board’s responsibilities related to the compensation of our executive officers, directors and senior management, as appropriate.

The Compensation Committee is primarily responsible for establishing and reviewing our general compensation strategy. The Compensation Committee generally meets quarterly, and with greater frequency if necessary, to, among other responsibilities, manage and evaluate our executive compensation program, and generally determines, which may be subject to final Board approval, the principal components of compensation (base salary, performanceannual performance-based cash bonus awards and equity awards) for our executive officers on an annual basis. However, decisions may occur at other times for new hires, promotions or other special circumstances as the Compensation Committee determines appropriate. The Compensation Committee does not delegate authority to approve executive officer compensation. The Compensation Committee generally reviews and determines equity-based incentive awards annually at the beginning of the fiscal year or as appropriate during the year for new hires, promotions, or other special circumstances, such as retention. The Compensation Committee will continue to evaluate its equity grant policies as we continue to evolve and grow as a public company.

The Compensation Committee works with and receives information and analyses from our Chief Executive Officer and other members of management, including within our legal, finance and human resources departments,department, and considers such information and analyses in determining the structure and amount of compensation to be paid to our executive officers, including our named executive officers. Our Chief Executive Officer evaluates and discusses with the Compensation Committee executive officer performance assessments and management’s recommendations and proposals regarding executive officer compensation programs and decisions affecting base salaries, equity compensation and other compensation-related matters outside of the presence of any other named executive officer. However,Our Chief People Officer discusses with the Compensation Committee role levels and compensation benchmarking. However, the Board retains the final authority to make all compensation decisions. While our Chief Executive Officer discusses his recommendations with the Compensation Committee for executive officers other than himself, he does not participate in the deliberations concerning, or the determination of, his own compensation.

From time to time, various other members of management and other employees, as well as outside advisors or consultants, may be invited by the Compensation Committee to make presentations, provide financial or other background information or advice or otherwise participate in Compensation Committee or Board meetings.

Members of management, including our Chief Executive Officer, may attend portions of the Compensation Committee’s meetings. However, our Chief Executive Officer is not present during decisions regarding his compensation.

Role of Compensation Consultant

The Compensation Committee has retained Meridian as its independent compensation consultant since 2021 due to its extensive analytical and compensation expertise relating to technology companies. Meridian reports directly to the Compensation Committee and does not provide any services to our company other than data and advice related to executive and director compensation matters. The Compensation Committee has analyzed whether the work of Meridian as the compensation consultant raised any conflict of interest, after taking into consideration the six factors prescribed by the SEC and Nasdaq. Based on its analysis, the Compensation Committee determined that the work of Meridian and the individual compensation advisors have conformed to the independence factors and guidance provided by the Dodd-Frank Wall Street Reform and Consumer Protection Act of 2010, the SEC and the Nasdaq listing standards.

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The Compensation Committee has the sole authority to engage and terminate Meridian’s services, as well as to approve its compensation. Meridian makes recommendations to the Compensation Committee, but has no authority to make compensation decisions on behalf of the Compensation Committee or Xometry. Meridian reports to the Compensation Committee and has direct access to the chairperson and the other members of the Compensation Committee.

Use of Competitive Market Compensation Data

The Compensation Committee believes that it is important when making compensation decisions to be informed as to the current practices of comparable public companies with which we may compete for top talent. To this end, the Compensation Committee works annually with Meridian to review and amend the list of our peer group companies to be used in connection with assessing compensation practices and pay levels. The Compensation Committee believes that the peer and market data provided by Meridian, along with other factors, is an important reference point when setting compensation for our named executive officers because competition for executive management is intense in our industry and the retention of our talented leadership team is critical to our success. WhileThe Compensation Committee generally targets setting our executive officers’ annual base salaries near the 50^th percentile of our peer group, annual performance-based cash bonuses near the 50^th percentile and equity compensation slightly above the 25^th percentile, but compensation relative to our peer group companies can and does vary by executive officer as a result of individual performance, tenure, scope of responsibility and other factors deemed relevant by the Compensation Committee, theCommittee. The Compensation Committee generally targetsreviews these criteria collectively but does not assign a weight to any particular criterion when setting base salary of our executive officers between the 25th and 50th percentiles of our peer group, annual performance-based cash bonuses near the 50th percentile and equity compensation between the 50th and 65th percentiles.levels. As a result, the Compensation Committee seeks to align total compensation with executive and corporate performance, such that executive compensation willmay exceed the median level of our peer group when our company exceeds its performance goals and demonstrates strong stockholder value over time.

20222023 Peer Group

In JanuaryNovember 2022, Meridian proposed, and the Compensation Committee approved, a group of publicly traded companies that would be appropriate peers for 2022to serve as a reference point when making 2023 compensation decisions, based ondecisions. In selecting the peer group, the following criteria:criteria were considered:

Our 2021 Revenue was $218.3 million and our market capitalization as of December 31, 2021 was approximately $2.275 billion.

Using the above criteria, the following 19 companies were identified as appropriately sized for our peer group by the Compensation Committee selected the following group of companies for the purpose of informing executive pay decisions for 2022:2023 (the “2023 Peer Group”):

•  3D Systems Corporation		LivePerson, Inc. •  Kornit Digital Ltd.		•  Poshmark, Inc.		Stratasys Ltd. •  SPS Commerce, Inc.
•  BTRS Holdings Inc.		Manhattan Associates, •  LivePerson, Inc.		PubMatic, •  Proto Labs, Inc.		The RealReal, Inc. •  Stratasys Ltd.
•  C3.ai, Inc.		MicroStrategy Incorporated •  Manhattan Associates, Inc.		Proto Labs, •  PubMatic, Inc.		•  Upwork Inc.
•  E2open Parent Holdings, Inc.		•  nCino, Inc.		•  Shutterstock, Inc.		•  Zuora, Inc.
•  Fiverr International Ltd.		nCino, inc.		Shutterstock, •  Payoneer Global Inc.		Vroom, Inc.
Kornit Digital Ltd.		Payoneer Global •  Sprinklr, Inc.		SPS Commerce, Inc.

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At the time of selection, the consensus estimate for our next twelve months’ revenue (as reported by S&P Global Market Intelligence) approximated the 40^th percentile of the 2023 Peer Group while our market capitalization approximated the 55^th percentile. For 2023, three companies were removed from the 2022 peer group (the “2022 Peer Group”)—MicroStrategy Incorporated, The RealReal, Inc., and Vroom, Inc.—because of business model disruptions that make them inappropriate peers at this time. Three new companies were added to form the 2023 Peer Group as shown above.

Stockholder Say-on-Pay2023 Advisory Vote on Executive Compensation

As of December 31, 2022, we became a “large accelerated filer” pursuant to SEC rules and exited “emerging growth company” status. As such, our stockholders will have their firstStockholders are provided the opportunity to cast aan annual non-binding“say-on-pay” advisory vote to approve the compensation of our named executive officers at the Annual Meeting. We intend to consider the outcome of the say-on-pay votes when making compensation decisions regarding our named executive officers. Our Board is recommending that we hold future say-on-pay votes on the compensation of our named executive officersofficers. At last year’s annual meeting of stockholders, approximately 99% of votes cast approved the say-on-pay proposal regarding the compensation awarded to our named executive officers. We take the views of our stockholders seriously and view this result as an indication that the principles of our executive compensation program are supported by our stockholders and that no significant changes to the structure of our executive compensation program were necessary.

At last year’s annual meeting, our stockholders also indicated their approval of the recommendation that we solicit a say-on-pay vote on an annual rather than a biennial or triennial, basis. Accordingly, following thewe are holding a say-on-pay vote at the upcoming Annual Meeting ourand intend to hold a next say-on-pay vote vote on an annual basis hereafter. A “say-on-frequency” vote is expected to occur atrequired every six years, and as such, our 2024 Annual Meeting of Stockholders.next say-on-frequency vote will be in 2029.

Elements of Our Fiscal Year 20222023 Executive Compensation Program

Narrative to the Summary Compensation Table

Base Salary

Our named executive officers receive a base salary to compensate them for services rendered to us. The base salary payable to each named executive officer is intended to provide aBase salaries represent an annual fixed component of compensation reflecting the executive’s skill set, experience, role and responsibilities. See “—Employment Arrangements” for additional information. TheEach named executive officer’s base salary of each named executive officer is adjusted based on a number of factors (including the value of current equity awards; scope and complexity of role; past performance; the Chief Executive Officer’s recommendations;recommendations for executive officers other than himself; and experience, qualifications and skills) and with reference to an analysis of competitive market data prepared by Meridian. In the first quarter of 2022,2023, the Compensation Committee reviewed the base salaries of our named executive officers and recommended that the Board approve increases to base salaries in amounts ranging from approximately 5%2% to 11%17% for each of the named executive officers to align with target market and internal positioning. The 20222023 base salaries of our named executive officers subsequently approved by the Board are shown below.

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Non-Equity Incentive Plan CompensationAnnual Cash Bonus Awards

Our named executive officers are eligible for annual bonusescash bonus awards based on company performance and individual performance, with payment amounts determined by the Compensation Committee based on the Compensation Committee’s assessment of performance for the applicable year. The annual incentive plan is intended to focus the entire organization on meeting or exceeding the annual performance goals that are set during the early part of each year and approved by the Compensation Committee or the Board, while also providing significant opportunity to reward individual contributions.

Each named executive officer is assigned an annual target bonus opportunity, for an annual bonuswhich is expressed as a percentage of such executive’s base salary. Each executive’s annual target annual incentive percentagebonus opportunity generally increases as such executive’s ability to affect our company’s performance increases. Consequently, as an

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In consideration of the foregoing, in March 2024, the Board approved an annual cash bonus payout for each named executive officer, as reflected in the table below.

Equity-Based Incentive Awards

Equity-based compensation is an important foundation in executive compensation packages, as we believe it is important to maintain a strong link between executive incentives and the creation of stockholder value. We believe that performance and equity-based compensation can be an important component of the total executive compensation package for maximizing stockholder value while, at the same time, attracting, motivating and retaining high-quality executives. Prior to our IPO, all of the equity awards we granted were made pursuant to our 2016 Incentive Plan (the “2016 Plan”). Following our IPO, all of the equity incentive awards have been and will be granted under the terms of our 2021 Equity Incentive Plan (the “2021 Plan”), under which we may grant equity incentive awards to our directors, employees and consultants, and our affiliates, to enable us to obtain and retain services of these individuals, which we believe is essential to our long-term success.

Individual grants are determined by the Compensation Committee based on a number of factors, including current corporate and individual performance, the Chief Executive Officer’s recommendations for executive officers other than himself, outstanding equity holdings and their retention value and total ownership, historical value of our stock, the value of current equity awards of executives, and with reference to an analysis of competitive market data prepared by Meridian. Following this, the Compensation Committee recommends to the Board the size of individual grants to our executive officers.

We have historically used stock options as an incentive for long-term compensation to our named executive officers. In 2022,2023, as part of its annual process, the Compensation Committee reviewed our executive compensation program with Meridian to ensure it continues to achieve the goals of the program and remains competitive. Based

on its review, the Compensation Committee approved a change in the relative mixtureuse of equity awards to the Company’s executive officers to a mixture of 50% stock options and 50%

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restricted stock units (“RSUs”), which change became effective beginningconsistent with the grants made in 2022. In connection with its general review of our equity program, the Compensation Committee determined that the change to includesuch a mix of RSU and stock option awards as part of our executive officer’s equity compensation package would continue to have the effect of better attracting, retaining and incentivizing our executive officers to grow the business in a way that increases stockholder value.

In March 2022,2023, the Compensation Committee recommended, and the Board approved, equity awards to our named executive officers using a mixture of stock options and RSUs. The number of stock options and RSUs received by each named executive officer was based on an aggregate grant value approved by the Board, split 50% in the form of stock options and 50% in the form of RSUs.

The following table sets forth the annual equity incentive awards granted to our named executive officers in 2022:2023:

In March 2023, the Compensation Committee recommended, and the Board approved, a special one-time equity award for Mr. Goguen, our Chief Operating Officer, using a mixture of stock options and RSUs, for retention purposes. Mr. Goguen is a highly skilled executive in our industry and the Compensation Committee and the Board were concerned that the total value of Mr. Goguen’s equity holdings in Xometry prior to the grant of the special equity awards were below a level that was adequate for his retention. The aggregate grant value approved by the Board was split 50% in the form of stock options and 50% in the form of RSUs. The following table sets forth the special equity awards granted to Mr. Goguen in 2023:

In March 2024, the Compensation Committee introduced performance restricted stock units (“PSUs”) into our long-term incentive compensation program for 2024. PSUs are intended to further our pay-for-performance philosophy by incentivizing long-term value creation and strong financial performance, and further aligning the interests of our named executive officers with those of our stockholders. The PSUs are eligible to be earned upon achievement of certain corporate and financial performance metrics, to be measured as of the end of fiscal 2024, and, once earned based on performance, are subject to an additional time-based vesting period. One-third of the

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PSUs that are earned based on performance will vest when the Compensation Committee certifies achievement of the performance goals, and the remainder of the PSUs will vest in equal annual installments on the first and second anniversaries of the performance certification date, subject to the recipient’s continued service. For 2024, the Board did not issue stock options to our named executive officers; rather, the number of RSUs and PSUs received by each named executive officer was based on an aggregate grant value approved by the Board, split 50% in the form of RSUs and 50% in the form of PSUs.

Other Features of Our Compensation Program

Employment Offer Letters

We have entered into offer letters with each of our named executive officers. Each of these agreements established the named executive officer’s starting base salary, initial target annual bonus opportunity and initial equity grant. These individuals’ base salaries, annual bonus opportunities and any equity awards are reviewed annually by the Compensation Committee. The amounts effective for 20222023 are described above in this Compensation Discussion and Analysis.

Severance and Change in Control Benefits

Pursuant to the employment agreements we have entered into with each of our named executive officers (other than Mr. Leibel), each executive will be entitled to certain payments and benefits upon a qualifying termination of employment or a change in control. The agreements provide that if the executive resigns for Good Reason or we terminate such executive’s employment without Cause (each as defined in his employment agreement) not in connection with a Change in Control (as defined in the 2021 Plan), then hethe executive will be eligible to receive the following severance benefits: (1) twelve months (with respect to Mr.Messrs. Altschuler and Mr. Rallo) or six months (with respect to Mr. CroninGoguen and Mr. Goguen)Ms. Mayerhofer) of base salary, less applicable tax withholdings and paid in accordance with our regular payroll practices; (2) an amount equal to the executive’s prorated annual performance bonus for the calendar year in which the termination occurs, calculated based on the number of days the executive was employed during the applicable calendar year, less applicable tax withholdings; and (3) up to twelve months (with respect to Mr.Messrs. Altschuler and Mr. Rallo) or six months (with respect to Mr. CroninGoguen and Mr. Goguen)Ms. Mayerhofer) of the employer portion of COBRA premiums paid by us. In addition, if the executive resigns for Good Reason or we terminate such executive’s employment without Cause within three months prior to or twelve months following the effective date of a Change in Control, then hethe executive will also be eligible to receive the following severance benefits: (1) an amount equal to 100% (with respect to Mr.Messrs. Altschuler and Mr. Rallo) or 50% (with respect to Mr. CroninGoguen and Mr. Goguen)Ms. Mayerhofer) of the executive’s target annual performance bonus for the calendar year in which the termination occurs, less applicable tax withholdings; and (2) all of the outstanding and unvested time-based equity awards the executive held immediately prior to the termination date will become fully vested and immediately exercisable. As a condition to receiving the severance benefits set forth above, the executive must sign and comply with a separation agreement in a form presented by us, containing among other terms a general release of claims.

Mr. Leibel is subject to our corporate severance program (the “Severance Program”), which provides for specified payments and benefits to eligible employees whose positions are eliminated or whose employment is terminated other than for performance-related issues, misconduct or other for-cause reasons. If Mr. Leibel is terminated in accordance with a reduction in the number of employees due to a reduction in force or downsizing, change in strategy or job elimination (as determined by Xometry) then he will be eligible to receive the following severance benefits: (1) equivalent to 1.5 week’sweeks’ base pay for each year of continuous service to Xometry, not to exceed the lesser of (i) 16 weeks’ base pay, or (ii) the limit under Section 401(a)(17) of the Internal Revenue Code for the year in which termination occurs. The minimum severance pay for Mr. Leibel is 6 weeks’ base payoccurs; and (2) if COBRA is elected, for tenure of zero to three years or less, COBRA premiums for two months; tenure of four to seven years, COBRA premiums for three months; and tenure of eight or more years, COBRA premiums for four months. As a condition to receiving the severance benefits set forth above, Mr. Leibel must sign and comply with a separation agreement in a form presented by us, containing among other terms a general release of claims.

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A more detailed description of each of our named executive officer’s payment and benefits upon a termination or change in control is provided below under “Potential Payments upon Termination or Change in Control.”

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Summary Compensation Table

The following table sets forth information for each of the last three completed fiscal years regarding compensation awarded to or earned by our named executive officers during the years indicated:

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Grants of Plan-Based Awards

The following table shows for the fiscal year ended December 31, 20222023 certain information regarding grants of plan-based awards to the Named Executive Officersnamed executive officers.

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Outstanding Equity Awards at Fiscal Year-End

The following table provides information regarding equity awards held by the named executive officers that were outstanding as of December 31, 2022:2023.