UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 20132014

OR

For the transition period from                 to                

Commission file number 001-35806

The ExOne Company

(Exact Name of Registrant as Specified in its Charter)

127 Industry Boulevard North Huntingdon, PA 15642 (Address of Principal Executive Offices) (Zip Code)

(724) 863-9663 (Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  ¨    No  x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ¨    No  x

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  x¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Securities Exchange Act of 1934).    Yes  ¨    No  x

The aggregate market value of common stock held by non-affiliates for the last business day of the registrant’s most recently completed second fiscal quarter was approximately $455.8$414.6 million.

As of March 20, 2014, 14,425,1082015, 14,521,137 shares of common stock, par value $0.01 were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement to be filed pursuant to Regulation 14A of the general rules and regulations under the Securities Exchange Act of 1934, as amended, for its 20142015 Annual Meeting of Stockholders (“Proxy Statement”) are incorporated by reference into Part III of this Annual Report on Form 10-K.

TABLE OF CONTENTS

i

GLOSSARY OF DEFINED TERMS AND ABBREVIATIONS

“3D” means three dimensional.

“AM” means additive manufacturing.

“Amended MIT License Agreement” means the amendment to the Amended and Restated Exclusive Patent License Agreement by and between MIT and ExOne, dated January 22, 2013.

“Company” means The ExOne Company.

“ExMAL” means ExOne Materials Application Laboratory.

“ExOne Americas” means ExOne Americas LLC, a Delaware limited liability company and wholly-owned subsidiary of the Company. ExOne Americas was formerly known as ProMetal.

“ExTEC” means ExOne Training and Education Center.

“IPO” means the initial public offering of the common stock of the Company, which was completed on February 12, 2013.

“Lone Star” means Lone Star Metal Fabrication, LLC.

“Majority Member” means affiliates of S. Kent Rockwell, our Chairman and Chief Executive Officer, who is the indirect, sole shareholder of RHI and RFP.

“MAM” means Machin-A-Mation, a specialty machine shop located in Chesterfield, Michigan, which ExOne Americas acquired on March 3, 2014.

“MWT” means MWT-Gesellschaft für Industrielle Mikrowellentechnik mbH, a leading designer and manufacturer of industrial grade microwaves based in Elz, Germany, which ExOne GmbH acquired on March 6, 2014.

“MIT” means Massachusetts Institute of Technology.

“Plan” means the 2013 Equity Incentive Plan.

“ProMetal” means ProMetal RCT, LLC, a Delaware limited liability company and wholly-owned subsidiary of the Company. The Company is the sole member of ProMetal. ProMetal’s name was changed to ExOne Americas LLC on March 28, 2013.

“PSCs” means Production Service Centers.

“Reorganization” means on January 1, 2013, The Ex One Company, LLC, a Delaware limited liability company, merged with and into a Delaware corporation, which survived and changed its name to The ExOne Company.

“RFP” mean Rockwell Forest Products, Inc.

“RHI” means Rockwell Holdings, Inc.

“TMF” means Troy Metal Fabricating, LLC.

“TRUST” means the S. Kent Rockwell 1997 Irrevocable Trust.

“Variable Interest Entities” means Lone Star and TMF prior to March 27, 2013.

EXPLANATORY NOTE

On January 1, 2013, The Ex One Company, LLC, a Delaware limited liability company, merged with and into a Delaware corporation, which survived and changed its name to The ExOne Company. We refer to this as the Reorganization.“Reorganization.” As a result of the Reorganization, The Ex One Company, LLC became the Company, a Delaware corporation, the common and preferred interest holders of The Ex One Company, LLC became holders of common stock and preferred stock, respectively, of the Company and the subsidiaries of The Ex One Company, LLC became the subsidiaries of the Company. The preferred stock of the Company was converted into common stock on a 9.5 to 1 basis (1,998,275 shares of common stock) immediately prior to the IPO.our initial public offering (“IPO”).

On February 6, 2013, the Company’s Registration Statement on Form S-1, as amended (File No. 333-185933) was declared effective for the Company’s IPO, pursuant to which the Company registered the offering and sale of 6,095,000 shares of our common stock at a public offering price of $18.00 per share for an aggregate offering price of $109.7 million. The IPO closed on February 12, 2013.

On September 9, 2013, we commenced a secondary public offering of 3,054,400 shares of our common stock at a price to the public of $62.00 per share, of which 1,106,000 shares were sold by us and 1,948,400 were sold by selling stockholders (including consideration of the exercise of the underwriters’ over-allotment option). The secondary offering closed on September 13, 2013.

All consolidated financial information in this Annual Report on Form 10-Kreport includes Thethe accounts of ExOne, Company and its wholly-owned subsidiaries, ExOne Americas LLC (United States), ExOne GmbH (Germany), ExOne KK (Japan); effective in August 2013, ExOne Property GmbH (formerly(Germany); effective in March 2014, MWT—Gesellschaft für Industrielle Mikrowellentechnik mbH (Germany); effective in May 2014, ExOne Holding Deutschland GmbH) (Germany)Italy S.r.l (Italy) and through March 27, 2013 (see further description below), two variable interest entities (“VIEs”) in which ExOne KK (Japan)was identified as the primary beneficiary, Lone Star Metal Fabrication, LLC (“Lone Star”) and Troy Metal Fabricating, LLC (“TMF”).

All financial information for periods prior to January 1, 2013 is of The Ex One Company, LLC, our predecessor company, and its subsidiaries, and all financial information for periods prior to March 27, 2013, include Troy Metal Fabricating, LLCTMF and Lone Star, Metal Fabrication, LLC, two variable interest entitiesVIEs in which ExOne was identified as the primary beneficiary.

As used in this Annual Report on Form 10-K, unless the context otherwise requires or indicates, the terms “ExOne,” “our Company,” “the Company,” “we,” “our,” “ours,” and “us” refer to The ExOne Company and its wholly-owned subsidiaries.

IMPLICATIONS OF BEING AN EMERGING GROWTH COMPANY

As a company with less than $1.0 billion in revenue during our last fiscal year, we qualify as an “emerging growth company” as defined in the Jumpstart our Business Startups Act of 2012 (the “JOBS Act”). An emerging growth company may take advantage of specified reduced reporting requirements and is relieved of certain other significant requirements that are otherwise generally applicable to public companies.

As an emerging growth company:

We will continue to operate under these provisions for up to five years or such earlier time that we are no longer an emerging growth company. We would cease to be an emerging growth company if we have more than $1.0 billion in annual revenues, qualify as a “large accelerated filer” under the Securities Exchange Act of 1934, as amended (which(the “Exchange Act”), which requires us to have more than $700 million in market value of our common stock held by non-affiliates),non-affiliates, or issue more than $1.0 billion of non-convertible debt over a three-year period. We may choose to take advantage of some, but not all, of these reduced burdens.

TRADEMARKS, SERVICE MARKS AND TRADE NAMES

We have registrations in the United States for X1.the following trademarks: EXONE, EXTEC, LUXCELIS,M-FLEX, ORION, PROFILEVIEW, and S MAX. We also have applications for registration pending for the following trademarks: EXCAST, EXERIAL, EXMAL, X1 ExOne Digital Part Materialization (plus design), INNOVENT, M-PRINT, S-MAX, S-MAX+, S-PRINT, X1, and X1-LAB. We also have registrations for EXONE in China, Europe (Community Trade Mark), Japan, and South Korea, and an application for registration pending in Canada for that trademark. We have filedregistrations for trademark registrationsX1 ExOne Digital Part Materialization (plus design) in the United StatesChina, Europe (Community Trade Mark), and in Canada, Europe, Japan, China,South Korea, and applications for registration pending in Brazil and Canada for ExOne andthat mark. We have a registration for the mark X1 pending in Europe (Community Trade Mark). We have a registration for the mark EX-1 in Europe (Community Trade Mark). We have registrations for a stylized form of X1 ExOne DIGITAL PART MATERIALIZATION.in Europe (Community Trade Mark) and South Korea. We have filed for trademark registrations in Canada and Japan for DIGITAL PART MATERIALIZATION.MATERIALIZATION in Japan and South Korea. We have an application for registration in Germany for the trademark S-MAX. We have applications for registration pending in Europe (Community Trade Mark) for the trademarks M-FLEX, EXERIAL, and INNOVENT. We also filedhave a registration in Canada for the trademark registrations in the United States for ExCAST, ExMAL, ExTEC, and M-Flex.LUXCELIS. Additionally, in March 2014 we acquired the trade names for MAMMachin-A-Mation Corporation (“MAM”) and MWT.MWT — Gesellschaft für Industrielle Mikrowellentechnik mbH (“MWT”). This prospectusAnnual Report on Form 10-K also contains trademarks, service marks and trade names’ of other companies, which are the property of their respective owners. Solely for convenience, marks and trade names referred to in this prospectusAnnual Report on Form 10-K may appear without the^® or TM symbols, but such references are not intended to indicate, in any way, that we will not assert, to the fullest extent under applicable law, our rights or the right of the applicable licensor to these marks and trade names. Third-party marks and trade names used herein are for nominative informational purposes only and their use herein in no way constituteconstitutes or areis intended to be a commercial use of such names and marks. The use of such third-party names and marks in no way constitutes or should be construed to be an approval, endorsement or sponsorship of us, or our products or services, by the owners of such third-party names and marks.

CAUTIONARY STATEMENT CONCERNING FORWARD LOOKING STATEMENTS

This Annual Report on Form 10-K may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act with respect to our future financial or business performance, strategies, or expectations. Forward-looking statements typically are identified by words or phrases such as “trend,” “potential,” “opportunity,” “pipeline,” “believe,” “comfortable,” “expect,” “anticipate,” “current,” “intention,” “estimate,” “position,” “assume,” “outlook,” “continue,” “remain,” “maintain,” “sustain,” “seek,” “achieve,” as well as similar expressions, or future or conditional verbs such as “will,” “would,” “should,” “could” and “may.”

We caution that forward-looking statements are subject to numerous assumptions, risks and uncertainties, which change over time. Forward-looking statements speak only as of the date they are made and we assume no duty to and do not undertake to update forward-looking statements. Actual results could differ materially from those anticipated in forward-looking statements and future results could differ materially from historical performance.

In addition to risk factors previously disclosed in our reports and those identified elsewhere in this report, the following factors, among others, could cause results to differ materially from forward-looking statements or historical performance: timing and length of sales of machines; risks related to global operations including effects of foreign currency and risks related to the situation in the Ukraine; our ability to qualify more industrial materials in which we can print; the availability of skilled personnel; the impact of increased operating expenses and expenses relating to proposed acquisitions, investments and alliances; our strategy, including the expansion and growth of our operations; the impact of loss of key management; our plans regarding increased international operations in additional international locations; sufficiency of funds for required capital expenditures, working capital, and debt service; the adequacy of sources of liquidity; expectations regarding demand for our industrial products, operating revenues, operating and maintenance expenses, insurance expenses and deductibles, interest expenses, debt levels, and other matters with regard to outlook; demand for aerospace, automotive, heavy equipment, energy/oil/gas and other industrial products; the scope, nature or impact of acquisitions, alliances and strategic investments and our ability to integrate acquisitions and strategic investments; liabilities under laws and regulations protecting the environment; the impact of governmental laws and regulations; operating hazards, war, terrorism and cancellation or unavailability of insurance coverage; the effect of litigation and contingencies; the impact of

disruption of our manufacturing facilities or PSCs;production service centers (“PSCs”); the adequacy of our protection of our intellectual property; and material weaknesses in our internal control over financial reporting.

These and other important factors, including those discussed under “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this Annual Report on Form 10-K, may cause our actual results of operations to differ materially from any future results of operations expressed or implied by the forward looking statements contained in this Annual Report on Form 10-K. Before making a decision to purchase our common stock, you should carefully consider all of the factors identified in this Annual Report on Form 10-K that could cause actual results to differ from these forward looking statements.

PART I

Item 1. Business.

The Company

We are a global provider of 3Dthree dimensional (“3D”) printing machines and 3D printed and other products, materials and other services to industrial customers. Our business primarily consists of manufacturing and selling 3D printing machines and printing products to specification for our customers using our installed base of 3D printing machines. We offer pre-production collaboration and print products for customers through our seveneight PSCs, which are located in the United States, Germany, Italy and Japan. We build 3D printing machines at our facilities in the United States and Germany. We also supply the associated materials, including consumables and replacement parts, and other services, including training and technical support that is necessary for purchasers of our machines to print products. We believe that our ability to print in a variety of industrial materials, as well as our industry-leading printing capacity (as measured by build box size and printheadprint head speed) uniquely position us to serve the needs of industrial customers.

Our 3D printing machines use our binder jetting technology, powdered materials, chemical binding agents and integrated software to print 3D products directly from computer models by repeatedly depositing very thin layers of powdered materials and selectively placing chemical binding agents to form the printed product. One of our key industry advantages is that our machines are able to print products in materials which we believe are desired by industrial customers. Currently, our 3D printing machines are able to manufacture casting molds and cores from specialty silica sand and ceramics, which are the traditional materials for these casting products. Of equal importance, our 3D printing machines are capable of direct product materialization by printing in industrial metals, including stainless steel, bronze, iron, bonded tungsten, IN Alloy 625 and bonded tungsten.glass. We are in varying stages of qualifying additional industrial materials, for printing, such as titanium and tungsten carbide, aluminum, and magnesium.carbide. We have also undertaken an analysis of safety precautions for printing reactive materials, including possible facility and machine modifications. Our current material development plan calls for the implementation of such modifications as soon as practicable.in the beginning of the third quarter of 2015. Our continued goal is to qualify an additional indirect or directly printed industrial material every six months.

We believe that we are a leader in providing 3D printing machines, 3D printed and other products, materials and other services to industrial customers in the aerospace, automotive, heavy equipment, energy/oil/gas and other industries. In an effort to further solidify this position, the net proceeds from our IPOwe have been earmarked or spent in order to (i) expandexpanded our PSC network to fifteeneight global locations, by the end of 2015, (ii) increaseincreased capacity and upgradeupgraded technology in our production facilities in Germany, including consolidating our operations from five buildings located throughout the district of Augsburg to one purpose-builtmulti-purpose manufacturing, research and development, sales and administrative facility, (iii) expandexpanded our materials development initiatives, (iv) selected and achieve our goalare in the process of one new industrial material qualified every six months, (iv) select and deploydeploying an Enterprise Resource Planning (“ERP”) system to promote operational efficiency and financial controls, globally, (v) paypaid off existingpre-existing debt, and (vi) deploydeployed working capital to support growth. These uses of proceeds and priorities are consistent with the plan outlined by us during our IPO and communicated to our stockholders thereafter.

Our revenue growth is driven by increasing customer acceptance of our 3D printing technology. We believe that we can accelerate customer adoption of our technology by delivering turnkey 3D printing services and products, from design through product completion. In developing our next generation 3D printing machine platforms, we successfully focused on achieving the volumetric output rate demanded by our industrial customers. Our refined strategic focus emphasizes all phases of the production cycle, notably enhancements to pre-print, such as Computer Aided Design (“CAD”), simulation, and design optimization, as well as post-print processing, including metal finishing technologies and precision casting capabilities. We are exploring a combination of acquisitions, strategic investments, and/or alliances, some of which we believe will promote advances in pre-print and post-print processing. We intend to use part or all of the proceeds from our September 2013 secondary offering to achieve these and other objectives to maximize and attain our growth potential.

We conduct a significant portion of our business with a limited number of customers. Our top five customers represented approximately 23.1%, 25.5%, 31.7% and 40.9%31.7% of total revenue for 2014, 2013 2012 and 2011,2012, respectively. There were no customers for 2014, 2013 or 2012 that individually represented 10.0% or greater of

our total revenue. During 2011, we had one customer that individually represented 10.0% or greater of total revenue (Ryoyu Systems, a 3D printing machine customer). Sales of 3D printing machines are low volume, but generate significant revenue based on their per-unit pricing. Generally, sales of 3D printers are to different customers in each respective period, with the timing of such sales dependent on the customer’s capital budgeting cycle, which may vary from period to period. The nature of the revenue from 3D printing machines does not leave us dependent upon a single or a limited number of customers. Sales of 3D printed and other products, materials and other services are high volume, but generally result in a significantly lower aggregate price per order as compared to 3D printing machine sales. The nature of the revenue from 3D printed and other products, materials and other services does not leave us dependent upon a single or a limited number of customers.

The Company manages its business globally in a single operating segment in which it develops, manufactures and markets 3D printing machines, 3D printed and micromachinery, printedother products, materials and other services. Geographically, the Company conducts its business through wholly-owned subsidiaries in the United States, Germany, Italy and Japan.

Our History

Our business began as the advanced manufacturing business of the Extrude Hone Corporation, which manufactured its first 3D printing machine in 2003 using licensed technology developed by researchers at MIT.the Massachusetts Institute of Technology (“MIT”). In 2005, our business assets were transferred to The Ex One Company, LLC, a Delaware limited liability company, when Extrude Hone Corp. was purchased by another company. In 2007, we were acquired by S. Kent Rockwell through his wholly-owned company RFP.Rockwell Forest Products, Inc. On January 1, 2013, our Reorganization was completed when The Ex One Company, LLC was merged with and into a newly created Delaware corporation, which changed its name to The ExOne Company. On February 12, 2013, we completed our IPO, raising approximately $90.4 million in net proceeds after expenses to us. On September 13, 2013 we completed a secondary public offering, raising an additional $64.9 million in net proceeds after expenses to us.

The Additive Manufacturing Industry and 3D Printing

3D printing is the most common type of an emerging manufacturing technology that is broadly referred to as additive manufacturing.manufacturing (“AM”). In general, AM is a term used to describe a manufacturing process that produces 3D objects directly from digital or computer models through the repeated deposit of very thin layers of material. 3D printing is the process of joining materials from a digital 3D model, usually layer by layer, to make objects using a printhead,print head, nozzle, or other printing technology. The terms “AM” and “3D printing” are increasingly being used interchangeably, as the media and marketplace have popularized the term 3D printing rather than AM, which is the industry term.

AM represents a transformational shift from traditional forms of manufacturing (e.g.(e.g., machining or tooling), which are sometimes referred to as subtractive manufacturing. We believe that AM and 3D printing are poised to displace traditional manufacturing methodologies in a growing range of industrial applications. Our 3D printing process differs from other forms of 3D printing processes, in that we use a chemical binding agent and focus on industrial products and materials.

ExOne and 3D Printing

We provide 3D printed and other products, materials and other services primarily to industrial customers and other end-market users. We believe that we are an early entrant into the AM industrial products market and are one of the few providers of 3D printing solutions to industrial customers in the aerospace, automotive, heavy equipment and energy/oil/gas industries.

Our binder jetting 3D printing technology was developed over 15 years ago by researchers at MIT. Our machines build or print products from CAD by depositing successive thin layers of particles of materials such as silica sand or metal powder in a “build box.” A moveable printheadprint head passes over each layer and deposits a

chemical binding agent in the selected areas where the finished product will be materialized. Each layer can be unique.

Depending on the industrial material used in printing, printed products may need post-production processing. We generally use silica sand or foundry sand for casting, both of which typically require no additional processing. Products printed in other materials, such as glass or metals, or for use in specific applications, may need varying amounts of heat treating, drying or other post-processing.

Pre-Print.We believe that our customers have the opportunity to take greater advantage of the design freedom that our 3D printing technology provides. While we collaborate with our customers to develop and refine CAD designs that meet our customers’ specifications and can be read and processed by our 3D printing machines, we believe that additional pre-print capabilities would empower our customers to fully exploit the design freedom of 3D printing. As a result, we are exploring ways to develop, through a combination of acquisitions, strategic investments, and/or alliances, advanced CAD, simulation and design optimization tools. With these enhanced pre-print capabilities, our customers will be able to imagine, design, optimize and produce their ideal products, unconstrained by the limitations imposed by traditional manufacturing technologies.

Industrial Materials.As we experience increased demand for our products globally, it is essential that the material supply chain and distribution channels match and be in close proximity to our current and prospective customers. To ensure that such a supply chain exists or quickly develops, we may vertically integrate the supply of our print media. In addition, for the highest quality printed products, the sand grains and metal particles used in the 3D printing process must be uniform in size and meet very specific tolerances. Vertically integrating would have the additional advantage of ensuring that our PSCs and machine customers have certainty of access to the highest quality print media, meeting the exact specifications of our 3D printing machines.

Our Machines.Our 3D printing machines consist of a build box that includes a machine platform and a computer processor controlling the printheadsprint heads for applying layers of industrial materials and binding agents. We currently build our 3D printing machines in both Germany and the United States. Our machines are used to produce molds for castings, products for end users and prototypes. In some situations, we can make prototypes in metal rather than resin polymer, or make a part from a mold for the casting of a newly designed part, which we then cast at a qualified foundry. As a result, the prototype can be made from the same material as the final production part, which allows for more accurate testing of the prototype. We provide a broad spectrum of qualified materials for direct product materialization and are continuing to qualify additional materials for use in our printing process.

Our machines are used primarily to manufacture industrial products that are ordered in relatively low volumes, are highly complex and have a high value to the customer. For example, the manufacture of an aircraft

requires several complex parts, such as transmission housings (also known as gear-casings), which are needed in relatively low volume and have a high performance value in the aircraft. There are also a variety of machine parts made in traditional machining processes that can be made more cheaply using those processes. Over time, we may be able to manufacture some of those parts more cost effectively. Our technology is not appropriate for the mass production of simple parts, such as injection molded parts or parts made in metal stamping machines. Traditional manufacturing technology is more economical in making those parts. While we expect over time to be able to increase the kinds of parts that we can make more economically than using subtractive manufacturing, we do not ever expect to use our technology to make simple, low-cost, mass-produced parts.

The bulk of our machines are used to make complex sand molds, which are used to cast these kinds of parts for several industries; although, in some cases, we make the end part directly. We intend to expand the direct part production segment of our business as we grow. In addition, as our technologies advance and our unit cost of production decreases, we believe that we can increase the type and number of products that our 3D printing machines can manufacture in a cost-effective manner, expanding our addressable market. The latest generation in our machine portfolio allows customers to engage with our binder jetting technology for industrial series production, beyond the rapid prototyping and small batch production for which our other systems are being used.

Post-Print Processing.After a product is printed, the bound and unbound powder in the build box requires curing of the chemical binding agent. In the case of molds and cores, curing generally occurs at room temperature and the printed product is complete after the binder is cured. For certain applications, a drying process (utilizing an industrial microwave or other means) may be necessary. The mold or core is then poured at a foundry, yielding the finished metal product. We have identified and work with high quality foundries, and we are exploring ways to enhance the quality of precision castings in order to drive additional demand for our molds and cores and the machine platforms that print them. In conjunction with precision foundry capabilities, we believe that our casting technology offers a number of advantages over traditional casting methods, including increased yield, weight reduction and improved thermal range.

For other materials, such as stainless steel, bronze, iron and bonded tungsten, the product needs to be sintered, or sintered and infiltrated. With sintering, the product is placed into a vacuum furnace in an inert atmosphere to sinter the bonded particles and form a strong bonded porous structure. The porous structure can be further infiltrated with another material to fill the voids. After the sintering and infiltration, the product can be polished and finished with a variety of standard industrial methods and coatings. We believe that our direct materialization capabilities enable customers to develop the ideal design for products, free of the design constraints inherent in traditional manufacturing, in the industrial metal of choice and in a more efficient manner than traditional manufacturing methods.

Customers and Sales

Educating Our Customers.

Educating our customers and raising awareness in our target markets about the many uses and benefits of our 3D printing technology is an important part of our sales process. We believe that customers who experience the efficiency gains, decreased lead-time, increased design flexibility, and decreased cost potential of 3D printing, as compared to subtractive manufacturing, are more likely to purchase our machines and be repeat customers of our products. We educate our customers on the design freedom, speed, and other benefits of 3D printing by providing printing and design services and support through our growing number of PSCs. We also seek to expose key potential users to our products through our PSCs, installed machines at customers’ locations, university programs, and sales and marketing efforts.

Production Service Centers.

We have established a network of seveneight PSCs in North Huntingdon, Pennsylvania; Troy, Michigan; Houston, Texas; Auburn, Washington; North Las Vegas, Nevada; Augsburg, Germany;Gersthofen, Germany, Desenzano del Garda, Italy; and Kanagawa, Japan. Our five PSCs located in the United States were certified to ISO 9001:2008 as

Industrial Additive Manufacturers. Through our PSCs, we provide sales and marketing and delivery of support and printing services to our

customers. At our PSCs, our customers see our printing machines in operation and can evaluate their production capabilities before ordering a machine or a printed product. The PSCs are scalable and have a well-defined footprint that can be easily replicated to serve additional regional markets. As described below, placing our PSCs in strategic locations around the world is an important part of our business strategy.

For all customers, we offer the following support and services through our PSCs:

Our Competitive Strengths

We believe that our competitive strengths include:

•

Industrial MaterialMaterials. Currently, our 3D printing machines are able to manufacture casting molds and cores from specialty silica sand and ceramics, which are the traditional materials for these casting products. Of equal importance, our 3D printing machines are also capable of direct product materialization by printing in industrial metals, including stainless steel, bronze, iron, bonded tungsten, IN Alloy 625 and bonded tungsten.glass. We are in varying stages of qualifying additional industrial materials, for printing, such as titanium and tungsten carbide, aluminum, and magnesium.carbide. We have also undertaken an analysis of safety precautions for printing reactive materials, including possible facility and machine modifications. Our current material development plan calls for the implementation of such modifications as soon as practicable.in the beginning of the third quarter of 2015. Our continued goal is to qualify an additional indirect or directly printed industrial material every six months.

Our Business Strategy

The principal elements of our growth strategy include:

qualifying additional industrial materials, for printing, such as titanium and tungsten carbide, aluminum, and magnesium.carbide. We have also undertaken an analysis of safety precautions for printing reactive materials, including possible facility and machine modifications. Our current material development plan calls for the implementation of such modifications as soon as practicable.in the beginning of the third quarter of 2015. Our continued goal is to qualify an additional indirect or directly printed industrial material every six months. These qualified materials are distinguishable from printable materials in that they are commercially available for sale in industrial densities or for finished products printed at our PSCs. Our 3D printing machines are used for both development and commercial printing. We believe certain of our customers are interested in printing materials for their own development or other interests without regard to utilizing our post-processing methods. Additional materials printable in our printing systems include cobalt-chrome, IN Alloy 718, iron-chrome-aluminum, 17-4 stainless steel, 316 stainless steel and tungsten carbide. By expanding into these otherboth qualified and printable materials, we believe we can expand our market share and better serve our industrial customer base. WeDuring 2013, we established ExMAL,our ExOne Materials Application Laboratory (“ExMAL”), which focuses principally on materials testing. We believe ExMAL will assist us in increasing the rate at which we are able to qualify new materials. ExMAL is led by our Chief Technology Officer, Rick Lucas, whose background includes experience in materials testing and certification.

•

Increase the Efficiency of Our Machines to Expand the Addressable Market. We intend to invest in further developing our machine technology so as to increase the volume output per unit of time that our machines can produce. In 2011, we began selling a new second generation mid-sized platform, theS-Print machine. In 2013, we began selling our new M-Flex machine. In both cases,2014, we began selling ourS-Max+ and M-Print machines. In 2015, we announced the Innovent and Exerial and expect to deliver our first machines to customers during the year. In each case, the new machines are designed to increase the volume output per unit of time through advances in printheadprint head speed and build box size. AchievingThe Exerial machine is unique compared to ExOne’s predecessor systems in that it contains multiple industrial stations that allow for continuous production and simultaneous processing and is targeted at larger scale production achieving improved production speed and efficiency will expand our potential market for our machines and for products made in our PSCs.

Our Machines and Machine Platforms

We produce a variety of machines in order to enable designers and engineers to rapidly, efficiently, and cost-effectively design and produce industrial prototypes and production parts. The models of our machines differ based on the materials in which they print, build box size, and production speeds, but all utilize our advanced technology and designs. The variation in the models of machines that we produce allows for flexibility of use based on the needs of our customers.

We have created machine platformsExerial. The Exerial is our newest indirect printing machine. It is unique compared to our other indirect printing systems in that it contains multiple industrial stations that allow for continuous production and simultaneous processing. The Exerial is distinctly equipped with two job boxes, each 1.5 times larger than the single job box in our next largest model, the S-Max. Notably, the Exerial system offers a total build platform of 3,168 liters and is expected to be capable of printing output rates nearly four size ranges in order to cater to the job sizes at the machine prices that the market demands. Our two largest platforms, the “Max” size platform and the “Print” size platform, are differentiated from those of our competitors in their ability to print on an industrial size and scale.

We further differentiate our model name by a prefix of either “M” or “S” before the platform name. The S prefix indicates that the machine is largely used for printing molds and cores for castings. The M prefix indicates that the machine is largely used for the direct printing of objects. The largest platform, the Max size, is generally used for castings, and therefore the current model in this platform istimes faster than the S-Max. The Print size platform is broadly applicable inExerial utilizes a varietynew recoater system, multiple print heads and automation controls. As part of industrial uses, and therefore,the development of the Exerial, we have introducedfiled five patents related to machine design elements. We will formally debut this machine at the platform with bothM-PrintGIFA International Foundry Trade Fair in Dusseldorf, Germany in June 2015 and S-Print machines. We are currently offering the new Flex platformexpect to begin selling this machine in an M-Flex machine. The Lab size platform is primarily sold and used as the X1-Lab machine (a direct printing machine).2015.

Our machines come in a variety of sizes and are named for the size of print job they are able to produce. In descending order by capacity are our Max, Print, Flex, and Lab machines.

S-Max.S-Max/S-Max+.The S-Max machine theis our largest of our machines, has a build box size of 1.8 meters x 1 meter x 0.7 meters and sells for approximately $1.4 million (based upon average model options and exchange rates). The total time to produce an entire build box on the S-Max is approximately 24 hours.indirect printing machine presently available. We introduced theS-Max machine in 2010 to provide improved size and speed over the predecessor model, the S-15. Our PSCs eachThe S-Max has a build box size of 1,800 x 1,000 x 700mm. The S-Max machine is generally have at least one S-Max or S-15 machine installed on-site, which provides ourused by customers with the ability to print castinginterested in printing complex molds and cores on an industrial scale.scale for casting applications. Each of our global PSCs has at least one S-Max machine installed on-site. In addition to our traditionalS-Max machine, during 2014 we introduced an S-Max+ configuration designed for easier post-processing of the build box for certain applications which require phenolic or sodium silicate binder for printing.

S-Print/M-Print.Our Print machine platform has been completely redesigned and is our current mid-sized machine platform. The S-Print machine provides(indirect) and M-Print (direct) machines are our mid-sized printing machines presently available. Both the same cutting edge technology available in theS-Max platform, with an average price pointS-Print and M-Print have a build box size of approximately $0.8 million (based upon average model options and exchange rates). 800 x 500 x 400mm.

The S-Print machine is generally used by customers interested in printing objects made from silica sand and ceramics, with a particular focus on industrial applications for smaller casting cores that are often required for the aerospace industry, especially in hydraulic applications. The build box size also permits the use of exotic and expensive print materials, such as ceramics, that are required for high heat/high strength applications. The S-PrintM-Print machine build box is approximately 125 liters. This same basic platform is used in the M-Print, which isgenerally used by customers interested in direct printing of objects made from metals and glass. The average price point of the M-Print is approximately $0.9 million (based upon average model options and exchange rates). We have installed both S-Print and M-Print machines in certain of our PSCs to complement theour S-Max and S-15 machines currently in use.

M-Flex. The M-Flex machine is our most flexible direct printing machine presently available. We introduced ourthe M-Flex machine platform in 2013. We expect the M-Flex2013 to satisfy the demand for a large range of industrial customers that are interested in directly printing metals, ceramic and glass products. The average price point of approximately $0.4 million (based upon average model options and exchange rates) is designed to satisfy demand from industrial production houses. We have further developed a collaborative process for assisting the users in production implementation through theour ExTEC and ExMAL organizational efforts. The M-Flex has a build box size of 400 x 250 x 250mm.

X1-Lab.Innovent.The X1-LabInnovent is the smallest of our direct printing machines presently available. We introduced the Innovent machine in 2014 to provide improved size and speed over the predecessor model, the X1-Lab. As an industrial-grade, laboratory-sized machine, Innovent allows for testing material properties, specifically in educational institutions, research laboratories, and research and development departments at commercial organizations. Innovent is uniquely designed in that it balances a specific build platforms. Atbox for the technical qualification of materials with a smaller overall lab machine platform size, when compared to other industrial-grade 3D printers. Innovent offers a build volume that is eight times larger than the previous X1-Lab model – measuring at 65 x 160 x 65mm.

MWT Microwave. We offer industrial grade microwaves to be used in conjunction with our 3D printing systems for thermally processing certain sand molds or cores that are 3D printed using binders, such as phenolic binder, that require a drying process. Our microwave technology improves casting quality and reduces production costs for customers in specific industries, such as magnesium parts for aviation and steel alloy parts for hydraulic components. Our microwaves are customized designs and work with various of our systems, including Exerial, S-Max+ and S-Print.

Orion.The Orion is our laser micromachine. Micromachining is an average price pointintegrated process that combines the use of approximately $0.1 million (based upon average model optionsa short pulse laser with a patented trepanning (which is a type of laser drilling) head to capture and exchange rates), it is primarily used asmanipulate a development platform, as well as a teachinglaser beam. By controlling and manipulating the beam, the Orion machine can remove microns of material from precise locations with thousands of pulses per second. The beam manipulation capability allows for shape design features like tapers, making the Orion machine an effective tool for production of automotive and aerospace components. We elected to discontinue this product line effective at the end of 2014 in an engineering environment. There are over 20 X1-Lab machines installed at universities and research institutions in the United States and Europe.effort to focus our attention on our core 3D printing technologies.

Binding

We use liquid chemical binding agents during the printing process. We believe that our unique chemical binding agent technology can more readily achieve efficiency gains over time than other AM technologies such as laser-fusing technologies. For instance, in order to increase the print speed of laser-based technologies, another expensive industrial laser must be added to the manufacturing process, raising the unit cost of production.

We also announced in July 2013 that we have added(including phenolic and sodium silicate to our suite of binders for use in oursilicate) during the 3D printing process.

Phenolic binder, used with ceramic sand in the 3D printing of molds and cores, offers customers three benefits: (i) casting higher heat alloys; (ii) creating a higher strength mold or core; and (iii) improving the quality of the casting due to reduced expansion of the mold or core. These capabilities address challenges faced by the automotive, aerospace, heavy equipment and energy/oil/gas industries. We believe that the use of sodium

Sodium silicate will reducereduces or eliminateeliminates the release of fumes and gas in the casting process, helping to reduce costs associated with air ventilation and electrical and maintenance equipment, which we believe will appeal to casting houses that are in search of cleaner environmental processes.

Laser MicromachiningWe believe that our unique chemical binding agent technology can more readily achieve efficiency gains over time than other AM technologies such as laser-fusing technologies. For instance, in order to increase the print speed of laser-based technologies, another expensive industrial laser must be added to the manufacturing process, raising the unit cost of production.

In addition to manufacturing our 3D printing machines, we also manufacture the ExMicro Orion (“Orion”) machine, which is used for both conventional and exotic materials. Micromachining is an integrated process that combines the use of a short pulse laser with a patented trepanning (which is a type of laser drilling) head to capture and manipulate a laser beam. By controlling and manipulating the beam, the Orion machine, which we build in the United States, can remove microns of material from precise locations with thousands of pulses per second.

The beam manipulation capability allows us to shape design features like tapers, making the Orion machine an effective tool for production of automotive and aerospace components. The Orion machine sells for approximately $1.0 million, the first of which was sold to a production customer in 2013.

Marketing and Sales

We market our products under the ExOne brand name in our three major geographic regions — the Americas, Europe and Asia. Our sales are made primarily by our global sales force. Our sales force is augmented, in certain territories, by representatives with specific industry or territorial expertise. Even where we are supported by a representative, all of our product and service offerings provided by our PSCs are sold directly to customers by us.

We believe that our direct selling relationship helps to create one of the building blocks for our business — the creation of true collaboration between us and industrial customers who are interested in 3D printing. Increasingly, industrial producers are considering shifting from subtractive manufacturing techniques to 3D printing. Our marketing efforts include educating potential customers about 3D printing technology through collaboration starting with pre-production services and continuing with production and technical support at our PSCs. Currently, members of our sales peoplesalesforce are basedlocated in North Huntingdon, Pennsylvania; Troy, Michigan; Houston, Texas; Auburn, Washington; North Las Vegas, Nevada; Augsburg,Gersthofen, Germany; Desenzano del Garda, Italy; and Kanagawa, Japan. In addition, in 2013 and 2014 we have opened international sales offices or appointed individual sales representatives in each of China, Brazil, Italy, Russia, United Kingdom, Spain, Portugal, France, Slovenia, Turkey, India, South Korea, Taiwan and PortugalSingapore, expanding our machines sales efforts for the full range of ExOne products and laying the groundwork for future PSCs in these markets in the process.services.

2014 Acquisitions

On March 3, 2014, ExOne Americas purchased (i) substantially all the assets of Machin-A-Mation Corporation,MAM, a specialty machine shop located in Chesterfield, Michigan, and (ii) the real property on which Machin-A-Mation’sMAM’s business is located for an aggregate purchase price of approximately $5.0$4.9 million. The Machin-A-MationMAM business will remainremains in its current Michigan location, complementing our nearby PSC in Troy,

Michigan. This PSC focuses on advanced 3D printed cores and molds for the aerospace and shipbuilding industries. In addition, we expect to continue to serve and expand the existing Machin-A-MationMAM industrial customer base. We believe that Machin-A-Mation’sMAM’s specialty precision machining expertise helps us address the finishing requirements for complex parts which are cast from our 3D printed sand molds.

On March 6, 2014, ExOne GmbH acquired all of the shares of MWT-Gesellschaft für Industrielle Mikrowellentechnik mbH,MWT, a pioneer in industrial grade microwaves with leading design and manufacturing experience based in Elz, Germany, for approximately $4.8 million. We believe that this acquisition enhances our position as the market leader of 3D sand production systems for industry. Industrial grade microwaves are used for thermally processing certain sand molds or cores that are 3D printed using binders, such as phenolic binder, that require a drying process. Importantly, microwave technology improves casting quality and reduces production costs for customers in specific industries, such as magnesium parts for aviation and steel alloy parts for hydraulic components. MWT designs and manufactures equipment that is currently employed in our PSC operations. We also plan to offer this technology to customers in future system sales. MWT’sThe MWT microwave operation will be operationally integrated with our Augsburg,Gersthofen, Germany manufacturing operations.operations in 2015.

Our Customers

Our customers are located primarily in the Americas, Europe and Asia. We are a party to non-disclosure agreements with many of our customers, and therefore, are often prohibited from disclosing many of our customers’ identities. Our customers include several Fortune 500 companies that are leaders in their respective markets. The primary marketsindustries that we currently serve are:

We conduct a significant portion of our business with a limited number of customers. Our top five customers represented approximately 23.1%, 25.5%, 31.7% and 40.9%31.7% of total revenue for 2014, 2013 2012 and 2011,2012, respectively. There were no customers for 2014, 2013 or 2012 that individually represented 10.0% or greater of total revenue. During 2011, we had one customer that individually represented 10.0% or greater of total revenue (Ryoyu Systems, a 3D printing machine customer). Sales of 3D printing machines are low volume, but generate significant revenue based on their per-unit pricing. Generally, sales of 3D printers are to different customers in each respective period, with the timing of such sales dependent on the customer’s capital budgeting cycle, which may vary from period to period. The nature of the revenue from 3D printing machines does not leave us dependent upon a single or a limited number of customers. Sales of 3D printed and other products, materials and other services are high volume, but generally result in a significantly lower aggregate price per order as compared to 3D printing machine sales. The nature of the revenue from 3D printed and other products, materials and other services does not leave us dependent upon a single or a limited number of customers.

For 3D printing machines, our terms of sale vary by transaction. To reduce credit risk in connection with 3D printing machine sales, we may, depending upon the circumstances, require certain amounts be prepaid. In some circumstances, we may require payment in full and may require international customers to furnish letters of credit. For 3D printed and other products and materials, our terms of sale generally require payment within 30 to 60 days after delivery, although we also recognize that longer payment periods are customary in some countries where we transact business. Services arrangements are generally billed in accordance with specific contract terms which typically correspond to performance of the related services.

Services and Warranty

We have fully trained service technicians to perform machine installations in the Americas, Europe and Asia. We generally provide an industry standard one-year warranty on installed machines. Customers can purchase additional service contracts for maintenance and service. Finally, weWe also sell sparereplacement parts which we maintain in stock worldwide to assist in providing service expeditiously to our customers.

Our terms of sale generally require payment within 30 to 60 days after shipment of a product, although we also recognize longer payment periods are customary in some countries where we transact business.

Suppliers

Our largest suppliers in 2013,2014, based upon dollar volume of purchases, were Bauer GmbH & Co KG, Erhardt & Leimer GmbH, Bosch Rexroth AG, MWT GmbH, Fuji Film Dimatix, Sciullo Machine, Intek Systems and T&S Materials.

We buy our industrial materials from several suppliers and, except as set forth below, the loss of any one would not materially adversely affect our business. We currently have a single supplier of printheadsprint heads for our 3D printing machines. While we believe that our printheadprint head supplier is replaceable, in the event of the loss of that supplier, we could experience delays and interruptions that might adversely affect the financial performance of our business. Additionally, we obtain certain preproductionpre-production services through design and data capture providers, and certain post-production services though vendors with whom we have existing and good relationships. The loss of any one of these providers or vendors would not materially adversely affect our business.

Research and Development

We spent approximately $8.2 million, $5.1 million, $1.9 million and $1.5$1.9 million on research and development during 2014, 2013 2012 and 2011,2012, respectively. We expect to continue to invest significantly in research and development in the future.

A significant portion of our research and development expenditures have been focused upon the:

Intellectual Property

Patents and MIT Licenses.Our technology is covered by a variety of patents or licenses for use of patents. We are the worldwide licensee of certain patents of MIT for certain AM printing processes (the “MIT Patents”), with exclusive rights to practice the patents in certain fields including the application of the printing processes to metals (with sublicensing rights), and non-exclusive rights to practice the patents in certain fields including the application of the printing processes to certain non-metals (without sublicensing rights). Additionally, we hold patents solely or as majority owner as a result of our own technological developments and from the acquisition of ExOne GmbH (formerly known as Prometal RCT GmbH (subsequently renamed ExOne GmbH). Our patents are issued in the United States and in various foreign jurisdictions, including Germany and Japan. As a result of our commitment to research and development, we also hold process patents and have applied for other patents for equipment, processes, materials and 3D printing applications. The expiration dates of our patents range from 2015 to 2031. No current MIT Patents are scheduled to expire in the United States during 2014. The next MIT Patents scheduled to expire are in October 2015 and are directed to certain methods for removing powder from internal passages, certain mold configurations and making tools with internal passages. We believe that the expiration of patents in the near term will not impact our business.

The remaining MIT Patents under which we are licensed have expiration dates ranging from 20152017 to 2021 in the United States. We believe that the expiration of these licenses will not impact our business; however, the expiration may allow our competitors that were previously prevented from doing so to utilize binder jetting 3D printing. Nonetheless, we have developed know-how and trade secrets relative to our 3D printing technology and believe that our early entrance into the industrial market provides us with a timing and experience advantage.

Through our investment in our technology, we have been able to qualify industrial materials for use in our 3D printing machines, and we intend to continue such efforts. In addition, we have taken steps to protect much of our technology as a trade secret. Given the significant steps that we have taken to establish our experience in AM for industrial applications, as well as our ongoing commitment to research and development, we intend to maintain our preeminent position in the AM industry market.

We entered into an Amended and Restated Exclusive Patent License Agreement with MIT in June 2011. The terms of the amended agreement required that we remit both license fees and royalties to MIT based upon net sales of licensed products, processes and consumables. The term of the agreement commenced on January 1, 2011, and was to remain in force until the expiration or abandonment of all issued patent rights.

On January 22, 2013, we agreed with MIT to an amendment of its exclusive patent license agreement. The Amended MIT License Agreement provides for, among other things, (i) a reduction in the term of the agreement between us and MIT from the date of expiration or abandonment of all issued patent rights to December 31, 2016, (ii) an increase in the annual license maintenance fees due for the years ended December 31, 2013 through December 31, 2016 from $50,000 annually to $100,000 annually, with amounts related to 2013 through 2016 guaranteed by us, (iii) a settlement of all past and future royalties on net sales of licensed products, processes and consumables for a one-time payment of $200,000 (paid in March 2013), and (iv) a provision for optional extension of the term of the arrangement between the parties for an annual license maintenance fee of $100,000 for each subsequent year beyond 2016.

Trademarks.We have registrations in the United States for X1.the following trademarks: EXONE, EXTEC, LUXCELIS, M-FLEX, ORION, PROFILEVIEW, and S MAX. We also have applications for registration pending for the following trademarks: EXCAST, EXERIAL, EXMAL, X1 ExOne Digital Part Materialization (plus design), INNOVENT, M-PRINT, S-MAX, S-MAX+, S-PRINT, X1, and X1-LAB. We also have registrations for EXONE in China, Europe (Community Trade Mark), Japan, and South Korea, and an application for registration pending in Canada for that trademark. We have filedregistrations for trademark registrationsX1 ExOne Digital

Part Materialization (plus design) in the United StatesChina, Europe (Community Trade Mark), and in Canada, Europe, Japan, China,South Korea, and applications for registration pending in Brazil and Canada for ExOne andthat mark. We have a registration for the mark X1 pending in Europe (Community Trade Mark). We have a registration for the mark EX-1 in Europe (Community Trade Mark). We have registrations for a stylized form of “X1 ExOne DIGITAL PART MATERIALIZATION.”X1 in Europe (Community Trade Mark) and South Korea. We have also filed for trademark registrations in Canada and Japan for DIGITAL PART MATERIALIZATION.MATERIALIZATION in Japan and South Korea. We have an application for registration in Germany for the trademark S-MAX. We have applications for registration pending in Europe (Community Trade Mark) for the trademarks M-FLEX, EXERIAL, and INNOVENT. We also filedhave a registration in Canada for the trademark registrations in the United States for ExCAST, ExMAL, ExTEC, and M-Flex.LUXCELIS.

Trade Secrets. The development of our products, processes and materials has involved a considerable amount of experience, manufacturing and processing know-how and research and development techniques that are not easily duplicated. We protect this knowledge as a trade secret through the confidentiality and nondisclosure agreements which all employees, customers and consultants are required to sign at the time they are employed or engaged by us. Additional information related to the risks associated with our intellectual property rights are described withinItem 1A – Risk Factors of this Annual Report on Form 10-K.

Competition

Other companies are active in the market for 3D printing products and services. These companies use a variety of AM technologies, including:

Some of the companies that have developed and employ one or more AM technologies include: 3D Systems Corporation, Stratasys Inc., Voxeljet AG, EOS Optronics GmbH, EnvisionTEC GmbH and Solid Model Ltd.

Some of these processes and companies compete with some of the products and services that we provide. Despite the challenging competitive landscape, we believe that we are the only AM printing solutions provider that focuses primarily on industrial applications on a production scale. Our competitive advantages, including the size of our build platforms, the speed of our printing heads, the variety of materials used by industrial manufacturers in which we can print, the industry qualification of many of the materials we print in, our robust market capabilities, and our suite of machine system families offering scale and flexibility, also serve to differentiate us from the other competitors in the AM market.

We also compete with established subtractive manufacturers in the industrial products market. These companies often provide large-scale, highly capitalized facilities that are designed or built to fill specific production purposes, usually mass production. However, we believe that we are well positioned to expand our share of the industrial products market from these manufacturers as AM gains recognition. As our technologies improve and our unit cost of production decreases, we expect to be able to compete with subtractive manufacturing on a wide range of products, thereby expanding our addressable market.

Seasonality

Purchases of our 3D printing machines often follow a seasonal pattern owing to the capital budgeting cycles of our customers. Generally, 3D printing machine sales are higher in our third and fourth quarters than in our first and second quarters.

Backlog

At December 31, 2013,2014, our backlog was approximately $10.9$13.2 million. We expect to fulfill our December 31, 20132014 backlog during the next twelve months. This is compared to a backlog of $5.1$10.9 million at December 31, 2012.2013.

Environmental Matters

Compliance with federal, state and local laws and regulations relating to the discharge of materials into the environment or otherwise relating to the protection of the environment has not had a material impact on capital expenditures, earnings or the competitive position of us and our subsidiaries. We are not the subject of any legal or administrative proceeding relating to the environmental laws of the United States or any country in which we have an office. We have not received any notices of any violations of any such environmental laws.

Employees

As of December 31, 2013,2014, we employed a total of 229 (190304 (254 full time) employees at our seveneight locations. None of these employees is a party to a collective bargaining agreement, and we believe our relations with them are good.

Product and Geographic Information

Geographic information for revenue (based upon the country where the sale originated) for 2013 was United States 37.0%, Germany 37.3% and Japan 25.7%. Geographic information for revenue for 2012 was United States 27.2%, Germany 48.7% and Japan 24.1%. Geographic information for revenue for 2011 was United States 30.0%, Germany 37.1% and Japan 32.9%.

Refer to Note 18 to the consolidated financial statements included in Part II Item 8 of this Annual Report on Form 10-K for product and geographic information related to our revenues (based on the country where the sale originated) and geographic information related to our long-lived assets (based on the physical location of assets). For information on risks related to our international operations refer toItem 1A – Risk Factors.

Executive Offices

Our principal executive offices are located at 127 Industry Boulevard, North Huntingdon, Pennsylvania 15642 and our telephone number is (724) 863-9663.

Available Information

Our website address ishttp://www.exone.com. Information contained on our website is not incorporated by reference into this Annual Report on Form 10-K unless expressly noted.

We file reports with the Securities and Exchange Commission (the “SEC”), which we make available on our website free of charge at http://www.exone.com/financials.cfm. These reports include quarterly reportsAnnual Reports on Form 10-K, Quarterly Reports on Form 10-Q and current reportsCurrent Reports on Form 8-K, each of which is provided on our website as soon as reasonably practicable after we electronically file such materials with or furnish them to the SEC. We also make, or will make, available through our website other reports filed with or furnished to the SEC under the Exchange Act, including our Proxy Statements and reports filed by officers and directors under Section 16(a) of that Act. You can also read and copy any materials we file with the SEC at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, DC 20549. You can obtain additional information about the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330. In addition;addition, the SEC maintains a website (http://www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, including us.

You can obtain copies of exhibits to our filings electronically at the SEC’s website atwww.sec.gov or by mail from the Public Reference Section of the SEC at 100 F Street, N.E., Washington, D.C. 20549 at prescribed rates. The exhibits are also available as part of the Annual Report on Form 10-K for the year ended December 31, 2013,2014, which is available on ExOne’sour corporate website atwww.exone.com. Stockholders may also obtain copies of exhibits without charge by contacting our Chief Legal Officer and Corporate Secretary at (724) 863-9663.

Item 1A. Risk Factors.

RISK FACTORS

You should carefully consider the following risks, together with all of the other information in this annual report,Annual Report on Form 10-K, including our consolidated financial statements and related notes, in evaluating our business, future prospects and an investment in our common stock. If any of the following risks and uncertainties develops into actual events, our business, financial condition, results of operations and cash flows could be materially adversely affected. In that case, the price of our common stock could decline and you may lose all or part of your investment.

Risks Related to Our Business and Industry

We may not be able to significantly increase the number of materials in which we can print products fast enough to meet our business plan.

Our business plan is heavily dependent upon our ability to steadily increase the number of qualified materials in which our machines can print products, because this will increase our addressable market, both as to customersproducts. Our 3D printing machines are capable of direct product materialization by printing in industrial metals, including stainless steel, bronze, iron, bonded tungsten, IN Alloy 625 and products for customers.glass. We are in varying stages of qualifying additional industrial materials, for printing, such as titanium and tungsten carbide, aluminum, and magnesium.carbide. We have also undertaken an analysis of safety precautions for printing reactive materials, including possible facility and machine modifications. Our current material development plan calls for the implementation of such modifications as soon as practicable.in the beginning of the third quarter of 2015. Our continued goal is to qualify an additional indirect or directly printed industrial material every six months. However, qualifyingBy expanding into these other materials, we believe we can expand our market share and better serve our industrial customer base. Qualifying new materials is a complicated engineering task, and there is no way to predict whether, or when, any given material will be qualified. If we cannot hire people with sufficient technical skills to work on qualifying new materials for printing, or if we lack the resources necessary to create a steady flow of new materials, we will not be able to meet our business plan goals and a competitor may emerge that is better at qualifying new materials, either of which would have an adverse effect on our business results.

OurAny future success in qualifying new materials for printing may attract more competitors into our markets, some of which may be much largerincluding competitors with greater financial, technical, marketing, and other resources than we are.have.

If we succeed in qualifying a growing number of materials for use in our 3D printing machines, that will increase our addressable market. However, as we create a larger addressable market, our market may become more attractive to other 3D printing companies or large companies that are not 3D printing companies, but which may see an economic opportunity in the markets we have created. Because we are a supplier of 3D printed products to industrial companies, an increase in the number of competitors for our addressable market is likely to adversely affect our business and financial results.

We may not be able to adequately increase demand for our products.

Our business plan is built around a steady increase in the demand for our products. However, only a relatively small number of our potential customers know of the existence of AM and are familiar with its capabilities, and even fewer understand the potential benefits of using AM to manufacture products. If we do not develop effective strategies to raise awareness among potential customers of the benefits of AM and 3D printing, we may be unable to achieve our planned rate of growth, which could adversely affect our results of operations.

We may not be able to hire the number of skilled employees that we need to achieve our business plan.

For our business to grow in accordance with our business plan, we will need to recruit, hire, integrate and retain additional employees with the technical competence and engineering skills to operate our machines,

improve our technology and processes and expand our technological capability to print using an increasing variety of

materials. People with these skills are in short supply and may not be available in sufficient numbers to allow us to meet the goals of our business plan. In addition, new employees often require significant training and, in many cases, take significant time before they achieve full productivity. As a result, we may incur significant costs to attract and retain employees, including significant expenditures related to salaries and benefits, and we may lose new employees to our competitors or other companies before we realize the benefit of our investment in recruiting and training them. Moreover, new employees may not be or become as productive as we expect, as we may face challenges in adequately or appropriately integrating them into our workforce and culture. In addition, as we move into new geographic areas, we will need to recruit skilled employees in those areas. If we cannot obtain the services of a sufficient number of technically skilled employees, we may not be able to achieve our planned rate of growth, which could adversely affect our results of operations.

Our revenues and operating results may fluctuate.

Our revenues and operating results may fluctuatehave fluctuated in the past from quarter-to-quarter and year-to-year and are likely to continue to vary due to a number of factors, many of which are not within our control. Because our business is changing and evolving rapidly, our historical operating results may not be useful in predicting our future operating results. A significant portion of our machine orders are typically received during the third or fourth quarter of the fiscal year as a result of the timing of capital expenditures of our customers. Thus, revenues and operating results for any future period are not predictable with any significant degree of certainty. We also typically experience weaker demand for our machines in the first and second quarters. For these reasons, comparing our operating results on a period-to-period basis may not be meaningful. You should not rely on our past results as an indication of our future performance.

Fluctuations in our operating results and financial condition may occur due to a number of factors, including, but not limited to, those listed below and those identified throughout this “Risk Factors” section:

Due to the foregoing factors, you should not rely on quarter-to-quarter or year-to-year comparisons of our operating results as an indicator of future performance.

We may not be able to generate operating profits.

Since our inception, we have not generated operating profits. In the event that we are unable to execute on our business plan, we may be unable to generate profits in the future.

Our operating expenses (which include research and development and selling, general and administrative expenses) were approximately $32.2 million, $21.2 million $20.2 and $8.8$20.2 million for 2014, 2013, 2012 and 2011,2012, respectively. Increases in our research and development expenses are due primarily to continued investment in our 3D printing machine and micromachinery technology and increased costs associated with our materials qualification activities, including additional research and development headcount. Increases in our selling, general and administrative expenses are due primarily to increased expenses in professional service fees (including legal, audit and other consulting expenses) and increased personnel costs associated with an increased headcount (including salaries and related benefits) in making the transition from a private company to a publicly traded company. We expect that our operating expenses will continue to increase in future periods as we pursue our growth strategies. Any future increases in our research and development expenses and selling, general and administrative expenses will directly affect our future results of operations and may have an effect on our financial condition.

We may not be able to introduce new machines and related industrial materials acceptable to the market or to improve the technology and industrial materials used in our current machines.

Our revenues are derived from the sale of machines for, and products manufactured using, AM. OurWe have encountered and will continue to encounter risks and difficulties frequently experienced by growing companies in a market is subject to innovation and technological change.rapidly developing and changing technology. A variety of technologies have the capacity to compete against one another in our market, which is, in part, driven by technological advances and end-user requirements and preferences, as well as the emergence of new standards and practices. Our ability to compete in the industrial AM market depends, in large part, on our success in enhancing and developing new machines, in enhancing our current machines, in enhancing and adding to our technology, and in developing and qualifying new industrial materials in which we can print. We believe that to remain competitive we must continuously enhance and expand the functionality and features of our products and technologies. However, we may not be able to:

If the market does not develop as we expect, our revenues may stagnate or decline.

The marketplace for industrial manufacturing is dominated by conventional manufacturing methods that do not involve AM technology. If AM technology does not gain market acceptance as an alternative for industrial

manufacturing, or if the marketplace adopts AM based on a technology other than our technology, we may not be able to increase or sustain the level of sales of our products and machines and our results of operations would be adversely affected as a result.

Loss of key management or sales or customer service personnel could adversely affect our results of operations.

Our future success depends to a significant extent on the skills, experience and efforts of our management and other key personnel. We must continue to develop and retain a core group of management individuals if we are to realize our goal of continued expansion and growth. While we have not previously experienced significant problems attracting and retaining members of our management team and other key personnel, there can be no

assurance that we will be able to continue to retain these individuals and the loss of any or all of these individuals could materially and adversely affect our business. We do not carry key-man insurance on any member of management.

Our business is subject to risks associated with doing business globally.

Sales outside of the United States were 51.9%, 63.0% and 72.8% for 2014, 2013 and 2012, respectively. In addition, one of our growth strategies is to pursue additional opportunities for our business in several areas of the world outside of the United States, any or all of which could be adversely affected by the risks set forth below. Our operations outside of the United States are subject to risks associated with the political, regulatory and economic conditions of the countries in which we operate, such as:

Any of these factors could materially adversely affect sales of our products to global customers or harm our reputation, which could adversely affect our results of operations. In addition, the consequences of terrorism or armed conflicts are unpredictable, and we may not be able to foresee events that could have an adverse effect on our market opportunities or our business.

Continuing political instability in the Ukraine, sanctions against Russia, and Russia’s response to those sanctions, could materially adversely affect our business, results of operations and financial condition.

In March 2014, the Crimea region of the Ukraine was annexed by Russia. In response to this annexation and subsequent hostilities aimed at the Ukraine, other nations, including the United States and the European Union,

imposed evolving economic sanctions against Russia. United States and European concerns related to the political and military conditions in the region have prompted increasing levels of economic sanctions, targeting certain Russian companies in the finance, energy and defense industries and named Russian nationals that have been deemed to have direct involvement in destabilizing the situation in the Ukraine, as well as imposing restrictions on trading and access to capital markets (“Russian Sanctions”). In response, Russia announced its own trading sanctions against nations that implemented or supported the Russian Sanctions, including the United States and some European Union nations.

One of our growth strategies is to pursue opportunities for our business in several areas of the world outside of the United States. This strategy includes pursuing opportunities in Russia through our German subsidiary, ExOne GmbH, which has sold products and services (including 3D printing machines) to customers located in Russia.

Our German subsidiary, ExOne GmbH, is subject to the Russian Sanctions, primarily those imposed by the European Union, specifically Germany, related to doing business in Russia. The Russian Sanctions may delay or prevent ExOne GmbH’s ability to collect on existing or future accounts receivable from customers in Russia, to make future sales and to service existing ExOne equipment in Russia or to sell and deliver spare parts and consumables for our machines located in Russia.

In the event that the United States’ and the European Union’s political relationships with Russia further deteriorate, it is possible that additional and even more severe sanctions could be imposed by the United States or European Union against Russia or that Russia could impose additional retaliatory measures in response to current or future Russian Sanctions. These possible additional sanctions and measures could further disrupt or prevent our ability to do any business in Russia, may further increase the economic uncertainty in the affected regions and lead to further fluctuation in the value of foreign currencies, such as the Euro, used in these regions.

Our international operations pose currency risks, which may adversely affect our operating results.

Our operating results may be affected by volatility in currency exchange rates and our ability to effectively manage our currency transaction and translation risks. In general, we conduct our business, earn revenue and incur costs in the local currency of the countries in which we operate. As a result, our international operations present risks from currency exchange rate fluctuations. The financial condition and results of operations of each of our foreign operating subsidiaries are reported in the relevant local currency and then translated to U.S. dollars at the applicable currency exchange rate for inclusion in our combined consolidated financial statements. We do not manage our foreign currency exposure in a manner that would eliminate the effects of changes in foreign exchange rates. Therefore, changes in exchange rates between these foreign currencies and the U.S. dollar will affect the recorded levels of our foreign assets and liabilities, as well as our revenues, cost of sales, and operating margins, and could result in exchange losses in any given reporting period.

In the future, we may not benefit from favorable exchange rate translation effects, and unfavorable exchange rate translation effects may harm our operating results. In addition to currency translation risks, we incur currency transaction risks whenever we enter into either a purchase or a sale transaction using a different currency from the currency in which we receive revenues. In such cases we may suffer an exchange loss because we do not currently engage in currency swaps or other currency hedging strategies to address this risk.

Given the volatility of exchange rates, we can give no assurance that we will be able to effectively manage our currency transaction and/or translation risks or that any volatility in currency exchange rates will not have an adverse effect on our results of operations.

One of our principal stockholders is able to exert substantial influence.influence in determining the outcome of matters which require the approval of our stockholders.

S. Kent Rockwell, our Chairman and Chief Executive Officer, beneficially owns approximately 22.0%21.8% of our outstanding shares of common stock and may have effective control over the election of our Board of

Directors and the direction of our affairs. As a result, he could exert considerable influence over the outcome of any corporate matter submitted to our stockholders for approval, including the election of directors and any transaction that might cause a change in control, such as a merger or acquisition. Any stockholders in favor of a matter that is opposed by Mr. Rockwell would have to obtain a significant number of votes to overrule the votes of Mr. Rockwell.

We may need to raise additional capital from time to time if we are going to meet our growth strategy and may be unable to do so on attractive terms.

Expanding our business to meet the growth strategy may require additional investments of capital from time to time, and our existing sources of cash and any funds generated from operations may not provide us with sufficient capital. For various reasons, including any current noncompliance with existing or future lending arrangements, additional financing may not be available when needed, or may not be available on terms favorable to us. If we fail to obtain adequate capital on a timely basis or if capital cannot be obtained at reasonable costs, we willmay not be able to achieve our planned rate of growth, which will adversely affect our results of operations. Equity financing may result in ownership and economic dilution to our existing stockholders and/or require us to grant certain rights and preferences to new investors.

We are highly dependent upon sales to certain industries.

For 2013, ourOur revenues of machines and products werehave historically been concentrated to companies in the aerospace, automotive, , heavy equipment, and energy/oil/gas industries and those industries’ respective suppliers. To the extent any of these industries experience a downturn, our results of operations may be adversely affected.

For example, the energy/oil/gas industry is highly cyclical and demand for our products and services in such industry is substantially dependent on the level of expenditures by the industry for the exploration, development and production of crude oil and natural gas reserves, which are sensitive to oil and natural gas prices and generally dependent on the industry’s view of future oil and gas prices. Crude oil prices declined by nearly 50% during the fourth quarter of 2014 and have continued to decline into the first quarter of 2015. As oil and gas companies reduce planned capital spending in light of the decline in commodity prices, our results of operations may be adversely affected.

Additionally, if any of these industries or their respective suppliers or other providers of manufacturing services develop new technologies or alternatives to manufacture the products that are currently manufactured using our machines, it may adversely affect our results of operations.

We are currently dependent on a single supplier of printheads.print heads.

We currently rely on a single source to supply the printheadsprint heads used by our machines. While we believe that there are other suppliers of printheadsprint heads upon which we could rely, we could experience delays and interruptions if our supply is interrupted that might temporarily impact the financial performance of our business.

We may not be able to manage the expansion of our operations effectively in order to achieve our projected levels of growth.

We have expanded our operations significantly in recent periods, and our business plan calls for further expansion over the next several years. We anticipate that further development of our infrastructure and an increase in the number of our employees will be required to achieve our planned broadening of our product offerings and clientcustomer base, improvements in our machines and materials used in our machines, and our planned international growth. In particular, we must increase our marketing and services staff to support new marketing and service activities and to meet the needs of both new and existing customers. Our future success will depend in part upon the ability of our management to manage our growth effectively. If our management is unsuccessful in meeting these challenges, we may not be able to achieve our anticipated level of growth which would adversely affect our results of operations.

We may not be able to consummate and/or effectively integrate strategic acquisitions.

We may from time to time engage in strategic acquisitions and partnerships with third parties if we determine that they will likely provide future financial and operational benefits. Successful completion of any strategic transaction depends on a number of factors that are not entirely within our control, including our ability to negotiate acceptable terms, conclude satisfactory agreements and obtain all necessary regulatory approvals. In addition, our ability to effectively integrate an acquisition into our existing business and culture may not be successful, which could jeopardize future operational performance for the combined businesses.

We completed two acquisitions in the first quarter of 2014 and are currently exploring a combination of acquisitions, strategic investments, and/or alliances, some of which we believe will promote advances in pre-print and post-print process.processes. With respect to acquisitions, strategic investments, and/or alliances we are currently pursuing, there is no guarantee that we will complete such transactions on favorable terms or at all. The exploration, negotiation, and consummation of acquisitions, strategic investments and/or alliances may involve significant expenditures by us, which may adversely affect our results of operations at the time such expenses are incurred. We may not be able to successfully negotiate and complete a specific acquisition, investment, or alliance. In addition, any acquisition, investmentalliance on favorable terms. If we do complete acquisitions, they may not ultimately strengthen our competitive position or alliance may not be accretive to ExOne for a period of time which may be significant following the completion of such acquisition, investment or alliance.

Our planned expansionWe may be required to pay cash, incur debt and/or issue equity securities to pay for any such acquisition, each of our international sales is subject to various risks, and failure to manage these risks could adversely affect our results of operations.

Our business is subject to certain risks associated with doing business globally. Sales outside of the United States were 63.0%, 72.8% and 70.0%, for 2013, 2012 and 2011, respectively. One of our growth strategies is to pursue opportunities for our business in several areas of the world outside of the United States, any or all of which could be adversely affected by the risks set forth below. Our operations outside of the United States are subject to risks associated with the political, regulatory and economic conditions of the countries in which we operate, such as:

Any of these factors could materially adversely affect sales of our products to global customers or harm our reputation, which could adversely affect our resultsfinancial condition and the value of our common stock. Our use of cash to pay for acquisitions would limit other potential uses of our cash, including investments in our sales and marketing and product development organizations, and in infrastructure. The issuance or sale of equity or convertible debt securities to finance any such acquisitions would result in dilution to our stockholders. If we incur debt, it could result in increased fixed obligations and could also impose covenants or other restrictions that could impede our ability to manage our operations.

Global economic, political and social conditions have adversely impacted our sales and may continue to do so.

The uncertain direction and relative strength of the global economy, difficulties in the financial services sector and credit markets, continuing geopolitical uncertainties and other macroeconomic factors all affect spending behavior of potential end-users of our products. The prospects for economic growth in the United States and other countries remain uncertain and may cause end-users to further delay or reduce technology purchases. In particular, a substantial portion of our sales are made to customers in countries in Europe, which continues to experience a significant economic crisis. If global economic conditions remain volatile for a prolonged period, or if European economies experience further disruptions, our results of operations could be adversely affected. The global financial crisis affecting the banking system and financial markets has resulted in a tightening of credit markets, lower levels of liquidity in many financial markets and extreme volatility in fixed income, credit, currency and equity markets. These conditions may make it more difficult for our end-users to obtain financing.

Due to our plan to increase ourAs a global business activities,company, we may be adversely affected by violations of the FCPA, similar anti-bribery laws in other jurisdictions in which we currently or may in the future operate, or various international trade and export laws.

Our business plan envisions that we will conduct increasing amounts of business outside of the United States, which will create various domestic and foreign regulatory challenges. The Foreign Corrupt Practices Act of 1977, as amended (the “FCPA”), and similar anti-bribery laws in other jurisdictions generally prohibit U.S.-based companies and their intermediaries from making improper payments to non-U.S. officials for the purpose of obtaining or retaining business. We have policies and controls in place designed to ensure internal and external compliance with these and other anti-bribery laws. To ensure compliance, our anti-bribery policy and training on a global basis provides our employees with procedures, guidelines and information about anti-bribery obligations and compliance. Further, we require our partners, subcontractors, agents and others who work for us or on our

behalf to comply with anti-bribery laws. We also have procedures and controls in place designed to ensure internal and external compliance. However, such anti-bribery policy, training, internal controls, and procedures will not always protect us from reckless, criminal or unintentional acts committed by our employees, agents or other persons associated with us. If we are found to be in violation of the FCPA or other anti-bribery laws (either due to the intentional or inadvertent acts of our employees, or due to the intentional or inadvertent acts of others), we could suffer criminal or civil penalties, including monetary damages or other sanctions, which could have a material adverse effect on our business. In addition, actual or alleged violations could damage our reputation and adversely affect our results of operations.

We rely on our information technology systems to manage numerous aspects of our business and customer and supplier relationships, and a disruption or failure of these systems could adversely affect our results of operations.

We depend on our information technology or “IT,”(“IT”) systems to manage numerous aspects of our business and provide analytical information to management. We may incur significant costs in order to implement the security measures that we feel are necessary to protect our IT systems. However, our IT systems may remain vulnerable to damage despite our implementation of security measures that we deem to be appropriate. Our IT systems allow us to efficiently purchase products from our suppliers, provide procurement and logistic services, ship products to our customers on a timely basis, maintain cost-effective operations and provide superior service to our customers. Our IT systems are an essential component of our business and growth strategies, and a disruption to or failure of our IT systems could significantly limit our ability to manage and operate our business efficiently. These systems are vulnerable to, among other things, damage and interruption from power loss, including as a result of natural disasters, computer system and network failures, loss of telecommunication services, operator negligence, loss of data, security breaches and computer viruses. If our systems for protecting against cyber security risks prove not to be sufficient, we could be adversely affected by loss or damage of intellectual property, proprietary information, or client data, interruption of business operations, or additional costs to prevent, respond to, or mitigate cyber security attacks. Any such disruption or loss of business information could materially and adversely affect our results of operations. ExOne has not experienced a material impact as a result of cybersecurity issues.

New regulationsRegulations related to conflict-free minerals may cause us to incur additional expenses and may create challenges with our customers.

The Dodd-Frank Wall Street Reform and Consumer Protection Act contains provisions to improve transparency and accountability regarding the use of “conflict” minerals mined from the Democratic Republic of Congo (the “DRC”) and adjoining countries. These conflict minerals include tantalum, tin, gold or tungsten. The SEC has established new annual disclosure and reporting requirements for those companies who use “conflict”conflict minerals sourced from the DRC and adjoining countries in their products. We are currently conducting due diligence efforts in order to adhere to the initial disclosure requirements beginning in May 2014. These new requirements could adversely affect the sourcing, supply and pricing of materialstantalum, tin, gold or tungsten used in our products. As there may be only a limited number of suppliers offering conflict-free minerals, we cannot ensure that we will be able to obtain these conflict-free minerals in sufficient quantities or at competitive prices. Compliance with these new requirements may also increase our costs, including costs that may be incurred in conducting due diligence procedures to determine the sources of certain minerals used in our products and other potential changes to products, processes or sources of supply as a consequence of such verification activities. In addition, we may face challenges with our customers if we are unable to sufficiently verify the origins of the minerals used in our products.

We could be subject to personal injury, property damage, product liability, warranty and other claims involving allegedly defective products that we supply.

The products we supply are sometimes used in potentially hazardous applications, such as the assembled parts of an aircraft or automobile, that could result in death, personal injury, property damage, loss of production, punitive damages and consequential damages. While we have not experienced any such claims to date, actual or claimed defects in the products we supply could result in our being named as a defendant in lawsuits asserting potentially large claims.

We attempt to include provisions in our agreements with customers that are designed to limit our exposure to potential liability for damages arising from defects or errors in our products. However, it is possible that these limitations may not be effective as a result of unfavorable judicial decisions or laws enacted in the future.

Any such lawsuit, regardless of merit, could result in material expense, diversion of management time and efforts, and damage to our reputation, and could cause us to fail to retain or attract customers, which could adversely affect our results of operations.

We may not have adequate insurance for potential liabilities.

In the ordinary course of business, we may be subject to various product and non-product related claims, lawsuits and administrative proceedings seeking damages or other remedies arising out of our commercial operations. We maintain insurance to cover our potential exposure for most claims and losses. However, our insurance coverage is subject to various exclusions, self-retentions and deductibles, may be inadequate or unavailable to protect us fully, and may be cancelled or otherwise terminated by the insurer. Furthermore, we face the following additional risks under our insurance coverage:

Even a partially uninsured claim of significant size, if successful, could materially adversely affect our business, financial condition, results of operations and liquidity. However, even if we successfully defend ourselves against any such claim, we could be forced to spend a substantial amount of money in litigation expenses, our management could be required to spend valuable time in the defense against these claims and our reputation could suffer, any of which could adversely affect our results of operations.

If any of our manufacturing facilities or PSCs are disrupted, sales of our products may be disrupted, which could result in loss of revenues and an increase in unforeseen costs.

We manufacture our machines at our facilities in Augsburg,Gersthofen, Germany and North Huntingdon, Pennsylvania. Our PSCs are located in North Huntingdon, Pennsylvania; Houston, Texas; Troy, Michigan; Auburn, Washington; North Las Vegas, Nevada; Augsburg,Gersthofen, Germany; Desenzano del Garda, Italy and Kanagawa, Japan.

If the operations of these facilities are materially disrupted, we would be unable to fulfill customer orders for the period of the disruption, we would not be able to recognize revenue on orders, and we might need to modify our standard sales terms to secure the commitment of new customers during the period of the disruption and perhaps longer. Depending on the cause of the disruption, we could incur significant costs to remedy the disruption and resume product shipments. Such a disruption could have an adverse effect on our results of operations.

Under applicable employment laws, we may not be able to enforce covenants not to compete and therefore may be unable to prevent our competitors from benefiting from the expertise of some of our former employees.

We generally enter into non-competition agreements with our employees. These agreements prohibit our employees, if they cease working for us, from competing directly with us or working for our competitors or clients

customers for a limited period. We may be unable to enforce these agreements under the laws of the jurisdictions in which our employees work, including Germany, Italy and Japan, and it may be difficult for us to restrict our competitors from benefitting from the expertise of our former employees or consultants developed while working for us. If we cannot demonstrate that our legally protectable interests will be harmed, we may be unable to prevent our competitors from benefiting from the expertise of our former employees or consultants and our ability to remain competitive may be diminished.

Risks Related to Our Intellectual Property

We may not be able to protect our trade secrets and intellectual property.

While some of our technology is licensed under patents belonging to others or is covered by process patents which are owned or applied for by us, much of our key technology is not protected by patents. Since we cannot legally prevent one or more other companies from developing similar or identical technology to our unpatented technology, it is likely that, over time, one or more other companies may be able to replicate our technology, thereby reducing our technological advantages. If we do not protect our technology or are unable to develop new technology that can be protected by patents or as trade secrets, we may face increased competition from other companies, which may adversely affect our results of operations. We generally enter into confidentiality and/or license agreements with our employees, consultants, vendors and advertisers, and generally limit access to and distribution of our proprietary information. However, we cannot provide assurance that any steps taken by us will prevent misappropriation of our trade secrets and intellectual property.

We enjoy license rights and exclusivity of certain patents and intellectual property and cannot adequately estimate the effects of their expiration upon the entrance or advancement of competitors into the AM industrial market.

We have exclusive license and non-exclusive license rights to certain patents that we utilize in the industrial market. Some of these patents expired in 20132014 and others are scheduled to expire in 2015.future periods. The expiration of these patents could reduce barriers to entry into the AM industrial market, which could result in the reduction of our market share and earnings potential. We cannot adequately estimate the effect that the expiration of these patents will have upon the entrance or advancement of other AM manufacturers into the industrial market.

We may not be able to obtain patent protection or otherwise adequately protect or enforce our intellectual property rights, which could impair our competitive position.

Our success and future revenue growth will depend, in part, on our ability to protect our intellectual property. We rely primarily on patents, trademarks, and trade secrets, as well as non-disclosure agreements and other methods, to protect our proprietary technologies and processes globally. Despite our efforts to protect our proprietary technologies and processes, it is possible that competitors or other unauthorized third parties may obtain, copy, use, or disclose our technologies and processes. We cannot assure you that any of our existing or future patents or other intellectual property rights will not be challenged, invalidated, or circumvented or will otherwise provide us with meaningful protection. We may not be able to obtain foreign patents corresponding to our U.S. or foreign patent applications. Even if foreign patents are granted, effective enforcement in foreign countries may not be available. If our patents and other intellectual property protections do not adequately protect our technology, our competitors may be able to offer products similar to ours. We may not be able to detect the unauthorized use of our proprietary technology and processes or take appropriate steps to prevent such use. Our competitors may also be able to develop similar technology independently or design around our patents. Any of the foregoing events would lead to increased competition and lower revenue or gross profits, which would adversely affect our results of operations.

We may be subject to alleged infringement claims.

We may be subject to intellectual property infringement claims from individuals, vendors, and other companies who have acquired or developed patents in the field of AM for purposes of developing competing products or for the sole purpose of asserting claims against us. Any claims that our products or processes infringe on the intellectual property rights of others, regardless of the merit or resolution of such claims, could cause us to incur significant costs in responding to, defending, and resolving such claims, and may prohibit or otherwise impair our ability to commercialize new or existing products. If we are unable to effectively defend our technologies and processes, our market share, sales and profitability could suffer, which could adversely affect our results of operations.

Certain of our employees and patents are subject to German law.

Many of our employees work in Germany and are subject to German employment law. Ideas, developments, discoveries and inventions made by such employees and consultants are subject to the provisions of the German Act on Employees’ Inventions (Gesetz über Arbeitnehmererfindungen), which regulates the ownership of, and compensation for, inventions made by employees. We face the risk that disputes can occur between us and our employees or ex-employees pertaining to alleged non-adherence to the provisions of this act that may be costly to defend and take up our management’s time and efforts whether we prevail or fail in such dispute. In addition, under the German Act on Employees’ Inventions, certain employees retained rights to patents they invented or co-invented prior to 2009. Although most of these employees have subsequently assigned their interest in these patents to us, there is a risk that the compensation we provided to them may be deemed to be insufficient in the future and we may be required under German law to increase the compensation due to such employee for the use of their patent. In those cases where employees have not assigned their interests to us, we may need to pay compensation for the use of those patents. If we are required to pay additional compensation or face other disputes under the German Act on Employees’ Inventions, our results of operations could be adversely affected.

Risks Related to the Securities Markets and Ownership of Our Common Stock

We have broad discretion as to the use of the net proceeds from our February 2013 IPO and September 2013 secondary public offeringsecurities offerings and may not use them effectively.

We cannot specify with certainty how we will use the net proceeds that we have received or will receive from our February 2013 IPO and September 2013 secondary public offering.securities offerings. Our management has broad discretion in the application of the net proceeds, and we may use these proceeds in ways with which you may disagree or for purposes other than those contemplated at the time of the offering. The failure by our management to apply these funds effectively could have a material adverse effect on our business, financial condition and results of operations. Pending their use, we may invest the net proceeds from our IPO and secondarya securities offering in a manner that does not produce income or that loses value.

The market price of our common stock may fluctuate significantly.

The market price and liquidity of the market for shares of our common stock may fluctuatehas been and is expected to continue to be highly volatile and may be significantly affected by numerous factors, some ofincluding the risk factors described in this report and other factors which are beyond our control and may not be directly related to our operating performance. These factors include:

If equity research analysts do not publish research or reports about our business, or if they issue unfavorable commentary or downgrade our shares, the price of our shares could decline.

The trading market for our shares will rely in part on the research and reports that equity research analysts publish about us and our business. We do not have control over these analysts, and we do not have commitments from them to write research reports about us. The price of our shares could decline if one or more equity research analysts downgrades our shares, issues other unfavorable commentary, or ceases publishing reports about us or our business.

Future sales of our shares could reduce the market price of our shares.

The price of our shares could decline if there are substantial sales of our common stock, particularly by our directors, their affiliates or our executive officers, or when there is a large number of shares of our common stock available for sale. The perception in the public market that our stockholders might sell our shares also could depress the market price of our shares. From time to time, we may conduct offerings of our securities and our executive officers, directors and selling stockholders would be subject to lock-up agreements that restrict their ability to transfer their shares following the offering. The market price of our shares may drop significantly when the restrictions on resale by our existing stockholders lapse and these stockholders are able to sell their shares into the market. If this occurs, it could impair our ability to raise additional capital through the sale of securities, should we desire to do so.

We are incurring increased costs as a result of operating as a public company, and our management is required to devote substantial time to new compliance initiatives.

As a public company whose shares are listed on The NASDAQ Global Market, we incur significant accounting, legal and other expenses that we did not incur as a private company, and these expenses will increase even more after we are no longer an “emerging growth company” (as described below). We incur significant

costs associated with our compliance with the public company reporting requirements of the Securities and Exchange Act, of 1934, as amended (the “Exchange Act”), requirements imposed by the Sarbanes-Oxley Act (most notably Section 404), the Dodd Frank Wall Street Reform and Protection Act, and other rules adopted, and to be adopted, by the SEC and the NASDAQ Global Select Market. Compliance with these rules and regulations have increased our legal and financial compliance costs, introduced new costs (including stock exchange listing fees and costs related to investor relations and stockholder reporting), and made certain activities more time-consuming and costly. They also make it more difficult for us to obtain director and officer liability insurance, and we may incur substantial costs to maintain sufficient coverage.

In addition, changing laws, regulations and standards relating to corporate governance and public disclosure are creatingcreate uncertainty for public companies generally, increasing legal and financial compliance costs and making some activities more time consuming. These laws, regulations and standards are subject to varying interpretations, in many cases due to their lack of specificity, and, as a result, their application in practice may evolve over time as new guidance is provided by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices. We have invested resources to comply with evolving laws, regulations and standards, and this investment may result in increased general and administrative expenses and a diversion of management’s time and attention from revenue-generating activities to compliance activities. If our efforts to comply with new laws, regulations and standards differ from the activities intended by regulatory or governing bodies due to ambiguities related to their application and practice, regulatory authorities may initiate legal proceedings against us and our business may be adversely affected. We cannot predict or estimate the amount or timing of additional costs we may incur in the future to respond to these constantly evolving requirements. The impact of these requirements could also make it more difficult for us to attract and retain qualified persons to serve on our Board of Directors, our board committees or as executive officers.

As long as we remain an “emerging growth company” as defined in the JOBS Act, we may take advantage of certain exemptions from various reporting requirements that are applicable to other public companies that are not “emerging growth companies”. These exemptions include, but are not limited to, not being required to comply with the auditor attestation requirements of Section 404(b) of the Sarbanes-Oxley Act, less extensive disclosure obligations regarding executive compensation in our periodic reports and proxy statements, exemptions from the requirements to hold a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved and an extended transition period for complying with new or revised accounting standards. We will continue to operate under these provisions for up to five years or such earlier time that we are no longer an emerging growth company. We would cease to be an emerging growth company if we have more than $1.0 billion in annual revenues, qualify as

a “large accelerated filer” under the Securities Exchange Act, of 1934, as amended (whichwhich requires us to have more than $700 million in market value of our common stock held by non-affiliates at the end of our second fiscal quarter),quarter, or issue more than $1.0 billion of non-convertible debt over a three-year period.

We have never paid cash dividends on our common stock, and we do not anticipate paying any cash dividends in the foreseeable future. Therefore, if our share price does not appreciate, our investors may not gain and could potentially lose on their investment in our shares.

We have never declared or paid cash dividends on our common stock, nor do we anticipate paying any cash dividends on our share capital in the foreseeable future. We currently intend to retain all available funds and any future earnings to fund the development and growth of our business. As a result, capital appreciation, if any, of our shares will be investors’ sole source of gain for the foreseeable future.

As an emerging“emerging growth company,company” under the JOBS Act, we intend to follow certain permitted corporate governance practices instead of the otherwise applicable SEC and NASDAQ requirements, which may result in less protection than is accorded to investors in a non-emerging growth company.

As an emerging growth company, we will be permitted, and intend to follow, certain corporate governance practices instead of those otherwise required by the SEC and under the listing requirements of the NASDAQ Global Market. Following our emerging growth company governance practices, as opposed to the requirements that would otherwise apply to a company listed on the NASDAQ Global Market, may provide less protection to you than what is accorded to investors under the Listing Rules of the NASDAQ Global Market applicable to non-emerging growth company issuers.issuers and could make our common stock less attractive to investors.

As an emerging growth company, we will delay adoption of new or revised accounting standards, which may make our stock less attractive to investors and our trading price more volatile.

Pursuant to the JOBS Act, as an emerging growth company, we have elected to take advantage of an extended transition period for any new or revised accounting standards that may be issued by the Financial Accounting Standards Board (“FASB”) or the SEC, which means that when a standard is issued or revised and it has different application dates for public or private companies, we, as an emerging growth company, will delay adoption of the standard until it applies to private companies. This may make a comparison of our financial statements with any other public company that is either not an emerging growth company or is an emerging growth company that has opted out of using the extended transition period difficult, as different or revised standards may be used. If some investors find our common stock less attractive as a result, there may be a less active trading market for our common stock and our stock price may be more volatile and could decline.

If we fail to maintain an effective system of internal control over financial reporting in the future, we may not be able to accurately report our financial condition, results of operations or cash flows, which may adversely affect investor confidence in us and, as a result, the value of our common stock.

The Sarbanes-Oxley Act requires, among other things, that we maintain effective internal controls for financial reporting and disclosure controls and procedures. The term “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, means controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to the company’s management, including its principal executive and principal financial officers, as appropriate to allow timely decisions regarding required disclosure. Beginning with our Annual Report on Form 10-K for the year ending

December 31, 2013, weWe are now required under Section 404(a) of the Sarbanes-Oxley Act to furnish a report by management on, among other things, the effectiveness of our internal control over financial reporting. This assessment includes disclosure of any material weaknesses identified by our management in our internal control over financial reporting.

In connection with the preparation of our consolidated financial statements for the year ended December 31, 2013,2014, we concluded that there are material weaknesses in the design and operating effectiveness of our internal control over financial reporting as defined in SEC Regulation S-X. A material weakness is a control deficiency, or combination of deficiencies, in internal control over financial reporting such that there is a reasonable possibility that a material misstatement of annual or interim financial statements will not be prevented or detected on a timely basis. A description of the identified material weaknesses in internal control over financial reporting areis as follows:

did not maintain adequate control with respect to the application of accounting principles generally accepted in the United States of America (“GAAP”). This was principally due to a lack of personnel with adequate knowledge and experience in GAAP. As a result, we record certain manual, post-close adjustments in order to prepare our consolidated financial statements.

With the oversight of senior management and our audit committee, we have put into place a comprehensive plan to remediate the underlying causes of the identified material weaknesses. Our plan throughout 2014 and into 2015 is to continue to take additional steps and additionalimplement measures to remediate the underlying causes of the identified material weaknesses including (i) enhancing our global accounting and reporting process by designing and strengthening the operating effectiveness of internal controls over financial reporting, (ii) evaluating our information technology systems to further integrate existing systems or invest in improvements to our technology sufficient to generate accurate and timely financial information, and (iii) addingincluding:

These ongoing efforts, collectively, give us the opportunity to remediate the material weaknesses in internal controls when we report our results for the 2015 fiscal year.

We documented and evaluated our internal control over financial reporting in order to report on the effectiveness of our internal controls as of December 31, 20132014 and, as described inItem 9A – Controls and Procedures, management has determined that our internal control over financial reporting was ineffective as of December 31, 2013.2014. Furthermore, as our business continues to grow internationally, our internal controls will become more complex and will require significantly more resources and attention to remediate existing control deficiencies and improve the effectiveness of our internal controls over financial reporting. If our management cannot favorably assess the effectiveness of our internal controls over financial reporting, investor confidence in our financial results may weaken, and our share price may suffer.

Notwithstanding the identified material weaknesses, management believes the consolidated financial statements included in this Annual Report on Form 10-K fairly present in all material respects our financial condition, results of operations and cash flows as of and for the periods presented in accordance with GAAP.

Additionally, Section 404(b) of the Sarbanes-Oxley Act requires an attestation from our independent registered public accounting firm on the effectiveness of our internal control over financial reporting. As an emerging growth company, we will not be required to comply with Section 404(b) until we file our Annual Report on Form 10-K for the year ended December 31, 2018 with the SEC, provided we maintain our status as an emerging growth company for the full five-year period.

The additional measures necessary to remediate the underlying causes of our identified material weaknesses and our future compliance with Section 404(b) will require that we incur substantial accounting expense and expend significant management efforts. We currently do not have an internal audit group, and we will need to hire additional accounting and financial staff with appropriate public company experience and technical accounting knowledge. We cannot assure you that there will not be material weaknesses or significant deficiencies in our internal control over financial reporting in the future. Any failure to maintain internal control over financial reporting could severely inhibit our ability to accurately report our financial condition, results of operations or cash flows. If we are unable to conclude that our internal control over financial reporting is effective, or if our independent registered public accounting firm determines we have a material weakness or significant deficiency in our internal control over financial reporting once that firm begins its Section 404(b) attestations, we could lose investor confidence in the accuracy and completeness of our financial reports, the market price of our common stock could decline, investor groups like Institutional Shareholder Services could initiate a withhold vote campaign with respect to the re-election of the members of our audit committee, and we could be subject to sanctions or investigations by NASDAQ, the SEC or other regulatory authorities. Failure to remedy any material weakness in our internal control over financial reporting, or to implement or maintain other effective control systems required of public companies, could also restrict our future access to the capital markets.

Provisions in our charter documents or Delaware law may inhibit a takeover or make it more difficult to effect a change in control, which could adversely affect the value of our common stock.

Our certificate of incorporation and bylaws contain, and Delaware corporate law contains, provisions that could delay or prevent a change of control or changes in our management. These provisions will apply even if some of our stockholders consider the offer to be beneficial or favorable. If a change of control or change in management is delayed or prevented, the market price of our common stock could decline.

Raising additional capital by issuing securities may cause dilution to our stockholders.

We may need or desire to raise substantial additional capital in the future. Our future capital requirements will depend on many factors, including, among others:

If we raise additional funds by issuing equity or convertible debt securities, we will reduce the percentage ownership of our then-existing stockholders, and the holders of those newly-issued equity or convertible debt

securities may have rights, preferences, or privileges senior to those possessed by our then-existing stockholders. Additionally, future sales of a substantial number of shares of our common stock or other equity-related securities in the public market could depress the market price of our common stock and impair our ability to raise capital through the sale of additional equity or equity-linked securities. We cannot predict the effect that future sales of our common stock or other equity-related securities would have on the market price of our common stock.

Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

We have eight locations. Note the following with respect to these locations:

On August 1, 2013, we entered into an agreement for purchase of land in Gersthofen, Germany, in the district of Augsburg to build a new multi-use facility. The facility will comprise approximately 150,700 square feet of production, warehouse, service and research and development space as well as approximately 27,600 square feet for offices. We intend to consolidate our five existing leased facilities in Augsburg, which currently occupy an aggregate of approximately 77,500 square feet, into the new facility, providing expansion capacity to support its global growth strategy. We estimate that we will complete construction of the new facility in the fourth quarter of 2014. We plan to fully exit our leased facilities in Augsburg, Germany by the first quarter of 2015.

Item 3. Legal Proceedings.

ExOne and its subsidiaries are subject to various litigation, claims, and proceedings which have been or may be instituted or asserted from time to time in the ordinary course of business. Management does not believe that the outcome of any pending or threatened matters will have a material adverse effect, individually or in the aggregate, on our financial position, results of operations or cash flows.

Item 4. Mine Safety Disclosures.

Not applicable.

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Market Information

Our common stock has been listed on the NASDAQ Global Market since February 7, 2013 under the symbol “XONE.” Prior to that date, there was no public market for our common stock. Shares sold in our IPO were priced at $18.00 per share. The following table sets forth the ranges of high and low sales prices per share of our common stock as reported on the NASDAQ Global Market for the periods indicated. Such quotations represent inter-dealer prices without retail markup, markdown or commission and may not necessarily represent actual transactions.

Stockholders

As of March 7, 2014,6, 2015, there were 1620 stockholders of record, which excludes stockholders whose shares were held in nominee or street name by brokers. The actual number of common stockholders is greater than the number of record holders, and includes stockholders who are beneficial owners and whose shares are held in street name by brokers and other nominees. This number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

Dividend Policy

We do not anticipate that we will declare or pay regular dividends on our common stock in the foreseeable future, as we generally intend to invest any future earnings in the development and growth of our business. Future dividends, if any, will be at the discretion of our Board of Directors and will depend on many factors, including general economic and business conditions, our strategic plans, our financial results and conditions, legal requirements, any contractual obligations or limitations, and other factors that our Board of Directors deems relevant.

Securities Authorized for Issuance Under Equity Compensation Plans

Our 2013 Equity Incentive Plan (the “Plan”) was adopted on January 24, 2013 and approved by our stockholders on August 19, 2013. The table below sets forth information with regard to securities authorized for issuance under the Plan as of December 31, 2013.2014.

Stock Performance Graph

The following graph compares the performance of ExOne’sour common stock with (i) the NASDAQ Composite Index and (ii) the S&P 1500 Industrial Machinery Index. Such information shall not be deemed to be “filed.”

Company/Index		February 7, 2013				March 31, 2013				June 30, 2013				September 30, 2013				December 31, 2013				March 31, 2014				June 30, 2014				September 30, 2014				December 31, 2014
The ExOne Company		$	100			$	126			$	233			$	161			$	228			$	135			$	149			$	79			$	63
NASDAQ Composite Index		$	100			$	103			$	108			$	120			$	134			$	133			$	139			$	142			$	150
S&P 1500 Industrial Machinery Index		$	100			$	103			$	106			$	121			$	134			$	132			$	139			$	130			$	137

Source: S&P Capital IQ

Unregistered Sales of Equity Securities

On January 1, 2013, we merged our predecessor company, The Ex One Company, LLC, a Delaware limited liability company (the “LLC”), with and into a Delaware corporation (the “Corporation”), which changed its name to The ExOne Company. At the time the Reorganization became effective, by operation of the Delaware corporation law and in accordance with the Agreement and Plan of Merger by and between the LLC and the Corporation, each common unit of LLC membership interest was converted into 0.58 shares of our common stock for a total of 5,800,000 shares of common stock and each preferred unit of LLC membership interest was converted into 1 share of our Class A preferred stock or a total of 18,984,000 shares of Class A preferred stock. There were no underwriters. The persons who acquired shares of our common stock and our Class A preferred stock were those persons who were the owners of the equivalent class of LLC membership interests in our predecessor company prior to the Reorganization. The shares of common stock and Class A preferred stock were

not sold for cash, and we received no consideration in the transaction. The conversion of securities in the Reorganization was exempt from registration under Section 4(2) of the Securities Act as a private placement.

On February 6, 2013, we issued 2,500 shares of our common stock to each of Ms. Wachtel and Messrs. Semple, Sellier and Kilmer in connection with their appointment to our Board of Directors and their future service to us. These shares are subject to certain restrictions until certain vesting requirements are met. These shares vest, and the restrictions on transfer lapse, in one-third increments on the first, second and third anniversaries of the grant date, respectively. The issuance of these shares was exempt from registration under Section 4(2) of the Securities Act as a private placement.

Use of Proceeds from IPO

On February 6, 2013, our Registration Statement on Form S-1 (File No. 333-185933) was declared effective for our IPO, pursuant to which we offered and sold 5,483,333 shares of common stock at a public offering price of $18.00 per share; and RHI also offered and sold 611,667 shares of common stock at a public offering price of $18.00 per share. S. Kent Rockwell, our Chairman and Chief Executive Officer, is the beneficiary of the S. Kent Rockwell Revocable Trust, which is the indirect, sole stockholder of RHI. Accordingly, S. Kent Rockwell is deemed to have beneficial ownership of our common stock owned by RHI. The managing underwriter was FBR Capital Markets & Co. and the co-managers were BB&T Capital Markets and Stephens Inc.

As a result of the completion of our IPO on February 12, 2013, we received net proceeds of approximately $92.0 million, after deducting underwriting discounts and commissions. We did not receive any proceeds from the sale of 611,667 shares of common stock by RHI, although we bore the costs, other than underwriting discounts and commissions, associated with the sale of these shares. We incurred approximately $1.6 million in total associated offering costs in connection with the IPO of which $0.7 million were previously paid and deferred by us at December 31, 2012.

Except as described below, none of such payments were direct or indirect payments to any of our directors or officers or their associates or to persons owning 10.0 percent or more of our common stock or direct or indirect payments to others.

Rockwell Line of Credit (Demand Note Payable to Member)

On February 14, 2013, we paid approximately $9.9 million of the net proceeds from the IPO to repay a revolving line of credit that we had with RFP for working capital (the “Rockwell Line of Credit”). The Rockwell Line of Credit provided for borrowing, repayment and reborrowing from time to time. While no limit was specified, borrowings were subject to RFP’s approval. Borrowings under the Rockwell Line of Credit bore interest at the rate of 8.0% per annum and were repayable, in whole or part, upon demand of RFP. As of February 14, 2013, we had approximately $9.9 million in borrowings and accrued interest outstanding under the Rockwell Line of Credit. S. Kent Rockwell, our Chairman and Chief Executive Officer, is the beneficiary of the S. Kent Rockwell Revocable Trust, which is the indirect, sole stockholder of RFP. The Company no longer maintains the Rockwell Line of Credit.

Acquisition of Net Assets of Variable Interest Entities

On March 27, 2013, our wholly-owned subsidiary, ExOne Americas LLC, acquired certain assets, including property and equipment (principally land, buildings and machinery and equipment) held by our two variable interest entities, TMF and Lone Star and assumed all outstanding debt of the VIEs. Payment of approximately $1.9 million and $0.2 million was made to TMF and Lone Star, respectively, including a return of capital to these entities of approximately $1.4 million. These payments were made using a portion of the net proceeds from the IPO. Simultaneous with the completion of this transaction, we also repaid all of the outstanding debt assumed from the VIEs, resulting in a payment of approximately $4.7 million using net proceeds from the IPO.

Other

On February 14, 2013, we paid approximately $0.3 million of the net proceeds from the IPO to retire our building note payable to an unrelated third party with respect to our facility in North Huntingdon, Pennsylvania. There were no prepayment penalties or gains or losses associated with this early retirement of debt.

On April 4, 2013, we paid approximately $1.4 million of the net proceeds from the IPO to settle a financing lease obligation (including accrued interest) for a 3D printing machine with a related party. There were no prepayment penalties or gains or losses associated with this settlement.

On August 1, 2013, ExOne Property GmbH entered into an agreement with the Municipality of Gersthofen, Germany to purchase certain real property from the Municipality. We paid approximately $4.0 million (€3.0 million) of the net proceeds from the IPO to acquire this property.

On August 14, 2013, ExOne Property GmbH entered into a construction services contract with a turnkey provider of construction services for the design and construction of a new manufacturing facility to be located in the Municipality of Gersthofen, Germany. At December 31, 2013, we have used approximately $10.3 million (€7.5 million) of net proceeds from the IPO to fund this project. We expect to spend an additional $11.2 million (€8.1 million) of the net proceeds from the IPO in 2014 on this project.

On August 15, 2013, we entered into a purchase agreement for approximately one acre of land and a 17,240 square foot manufacturing facility in North Las Vegas, Nevada. We paid approximately $1.4 million of the net proceeds from the IPO to acquire this property for a total purchase price of approximately $1.4 million. This amount was subsequently paid in-full by us in September 2013 with net proceeds from the IPO.

In addition to the amounts identified above, we have used approximately $23.5 million in net proceeds from the IPO during 2013 for general corporate purposes, principally to support working capital and our operations (including expected capital expenditures and long-term debt and capital and financing lease repayments).

We had previously disclosed in our IPO an intention to assume the liabilities of our VIEs. Other than our payment of such liabilities described above, rather than the assumption of their debt, there has been no material change in the planned use of the net proceeds from our IPO as described in our final prospectus filed with the SEC pursuant to Rule 424(b). As of December 31, 2013, we held the remainder of the net proceeds from the IPO as cash and cash equivalents.

Item 6. Selected Financial Data.

The data presented in the Selected Financial Data table should be read in conjunction with the information required to be provided in Management’s Discussion and Analysis of Financial Condition and Results of Operations in Part II Item 7 and the consolidated financial statements and related notes thereto in Part II Item 8 of this Annual Report on Form 10-K. As the Company qualifies as an emerging growth company per the JOBS Act, certain selected financial data as ordinarily required under SEC Regulation S-K Item 301 for 2009 has been omitted. (See “Explanatory Note — Implications of Being an Emerging Growth Company” of this Annual Report on Form10-K for further information.)

Item 7.

Management’s Discussion and Analysis of Financial Condition and Results of Operations.

(dollars in thousands, except per-share amounts)

The following discussion and analysis should be read in conjunction with the Selected Financial Data in Part II Item 6 and our consolidated financial statements and related notes thereto in Part II Item 8 of this Annual Report on Form 10-K. Certain statements contained in this discussion may constitute forward looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, (the “Securities Act”) and, Section 21E of the Securities Exchange Act of 1934, as amended.Act. These statements involve a number of risks, uncertainties and other factors that could cause actual results to differ materially from those reflected in any forward looking statements, as a result of a variety of risks and uncertainties, including those described under “Cautionary Statements Concerning Forward Looking Statements” and “Risk Factors.”

Overview

Business and StrategyOur History

We are a global provider of 3D printing machines and printed products, materials and other services to industrial customers. Our business primarily consists of manufacturing and selling 3D printing machines and printing products to specification for our customers using our installed base of 3D printing machines. We offer pre-production collaboration and print products for customers through our seven production PSCs, which are located in the United States, Germany and Japan. We build 3D printing machines at our facilities in the United States and Germany. We also supply the associated materials, including consumables and replacement parts, and other services, including training and technical support, necessary for purchasers of our machines to print products. We believe that our ability to print in a variety of industrial materials, as well as our industry-leading printing capacity (as measured by build box size and printhead speed) uniquely position us to serve the needs of industrial customers.

As an additive manufacturer, we are an early entrant into an evolving manufacturing technology and marketplace. Our strategy has been to position our manufacturing assets, both in terms of our ability and capacity, to prepare for an anticipated increase of customer acceptance of this form of manufacturing. We have made financial support of this growth strategy a priority. We have invested in both our research and development and infrastructure, including capital investment in 3D printing machines, and hiring key personnel.

As our infrastructure grows, we intend to shift our strategic focus to opening additional PSCs in order to broaden our potential global customer base and to expand our 3D printing capability in an increasing variety of industrial materials. Our growth strategy focuses on growing our PSCs in order to print more products for our existing customers and gain new customers. By the end of 2015, we plan to expand our PSC network from the current seven locations to fifteen locations. Like our current PSCs, we plan to locate the additional PSCs in major industrial centers near existing and potential customers. While we may adjust based upon market considerations, our current plan includes opening two or more additional PSC locations in the first half of 2014.

Our growth strategy includes using our printed products as an introduction of our technology to facilitate 3D printing machine sales. An important part of reaching these goals is to increase our capability to print in a growing number of industrial materials and increase the job box sizes and production speeds (volumetric output) available to our potential customers, which will increase the efficiency and usefulness of our technology. In addition, we use our regional PSCs to educate our potential customers and the marketplace about the advantages of 3D printing.

We also believe expanding the location of our PSCs to high-growth economies and geographic regions that are readily accessible by a significant number of potential customers will help us to increase sales. To better balance our business, we intend to develop our customer base so that revenue is not dependent on any one region

(North America, South America and Latin America (collectively, “the Americas”), Europe and Asia). Likewise, we intend to balance revenue between our 3D printing machines and 3D printed products, materials and other services.

Our next generation 3D printing machine platforms have achieved the volumetric output rate and quality necessary to serve industrial markets on a production scale. We believe that there is an opportunity to similarly advance the pre-print and post-print processing phases of product materialization to more fully exploit the transformative power of our 3D printing machines and drive growth. These opportunities relate to both direct and indirect part materialization. For direct metal production, we believe that enhancing pre-print processes, notably design optimization tools and suitable print material availability, can greatly accelerate our capture of market share in the near-term. Additionally, enhancements to post-print processing will increase the applications for printed parts. Through ExMAL, we are developing post-print processing technologies to achieve fully dense metal product materialization without the need for infiltration, and we are exploring technology-sharing partnerships to further this initiative. In indirect production utilizing 3D printed molds and cores, advanced performance casting technologies can be leveraged to increase yields and reduce weight of casted products. To address the market opportunity and fill the execution gap, we have developed a suite of processes, many of which are proprietary, for producing high-quality castings through a process that we call ExCAST. ExCAST provides industry guidance and support through all stages of production, from CAD at the design stage, through the 3D materialization of molds and cores, metal casting of the end product and rapid delivery to the end-user.

Finally, we intend to opportunistically identify and, through acquisitions, alliances and/or strategic investment, integrate and advance complementary businesses, technologies and capabilities. Our goal is to expand the functionality of our products, provide access to new customers and markets, and increase our production capacity.

2013 Developments

Several important corporate developments occurred in 2013 that have had a significant impact on the presentation of our consolidated financial results.

ExOne was formed on January 1, 2013, when The Ex One Company, LLC, a Delaware limited liability company, merged with and into a Delaware corporation, which survived and changed its name to The ExOne Company. As a result of our Reorganization on January 1, 2013, The Ex One Company, LLC became ExOne, the common and preferred interest holders of The Ex One Company, LLC became holders of common stock and preferred stock, respectively, of ExOne, and the subsidiaries of The Ex One Company, LLC became the subsidiaries of ExOne.

The consolidated financial statements include the accounts of ExOne, its wholly-owned subsidiaries, ExOne Americas LLC (United States), ExOne GmbH (Germany), effective in August 2013, ExOne Property GmbH (formerly ExOne Holding Deutschland GmbH) (Germany), ExOne KK (Japan) and through March 27, 2013 two variable interest entities in which ExOne was identified as the primary beneficiary, Lone Star Metal Fabrication, LLC and Troy Metal Fabricating, LLC. On March 27, 2013, ExOne Americas LLC acquired certain assets, including property and equipment (principally land, buildings and machinery and equipment) held by the two VIEs, and assumed all outstanding debt of such VIEs. Following this transaction, neither of the entities continued to meet the definition of a VIE with respect to ExOne, and as a result, the remaining assets and liabilities of both entities were deconsolidated following the transaction.

On February 6, 2013, we commenced an initial public offering of 6,095,000 shares of our common stock at a price to the public of $18.00 per share, of which 5,483,333 shares were sold by us and 611,667 were sold by a selling stockholder (including consideration of the exercise of the underwriters’ over-allotment option). Following completion of the offering on February 12, 2013, we receivedcompleted our IPO, raising approximately $90.4 million in net proceeds of approximately $91,996 (net of underwriting commissions). In addition, we incurred associated offering costs of approximately $1,625, including approximately $712 in offering costs previously paid and deferred by us at December 31, 2012.

after expenses to us. On September 9,13, 2013, we commencedcompleted a secondary public offering, raising an additional $64.9 million in net proceeds after expenses to us.

Our Business

We are a global provider of 3,054,400 shares3D printing machines and 3D printed and other products, materials and services to industrial customers. Our business primarily consists of manufacturing and selling 3D printing machines and printing products to specification for our customers using our installed base of 3D printing machines. We offer pre-production collaboration and printed products for customers through our eight production PSCs, which are located in the United States, Germany, Italy and Japan. We build 3D printing machines at our facilities in the United States and Germany. We also supply the associated materials, including consumables and replacement parts, and other services, including training and technical support, necessary for purchasers of our common stock atmachines to print products. We believe that our ability to print in a pricevariety of industrial materials, as well as our industry-leading printing capacity (as measured by build box size and print head speed) uniquely position us to serve the publicneeds of $62.00 per share, of which 1,106,000 shares were sold by us and 1,948,400 were sold by selling stockholders (including consideration of the exercise of the underwriters’ over-allotment option). Following completion of the offering on September 13, 2013, we received net proceeds of approximately $65,315 (net of underwriting commissions). In addition, associated offering costs of approximately $1,012 were incurred in connection with this offering. Associated offering costs incurred by us in connection with the secondary public offering ($367) were based on our pro-rata sale of shares as compared to selling stockholders, who were responsible for their pro-rata portion ($645).industrial customers.

2014 Developments and 2015 Outlook

On March 3,Our results of operations for 2014 ExOne Americas purchased (i)were negatively affected by lower than expected sales of 3D printing machines as a result of longer than expected sales cycles for certain customers, as well as increased costs for production, research and development and selling, general and administrative activities, principally in the form of expanded facilities and personnel costs (consistent with our plan for 2014). Offsetting these negative effects, were increases in revenues associated with 3D printed and other products, materials and services, mostly due to increased customer acceptance and demand for our additive manufacturing technologies. Note the following operations highlights for 2014:

With our facilities expansion substantially behind us, and our new machine platforms gaining market attention, we plan to focus our attention in 2015 on the operational effectiveness of our business with the primary goal being the continued global adoption of our binder jetting technologies. This includes further expanding our business focus from predominantly prototyping activities and short-run production to series production, principally through our introduction of the Exerial machine platform. We plan to complete an extensive strategic review of our businesses which will consider the markets we serve, our customers and our geographic footprint. We intend to place a firm emphasis of maximizing revenues from our 3D printed sand molds.

On March 6, 2014, ExOne GmbH acquired all of the shares of MWT-Gesellschaft für Industrielle Mikrowellentechnik mbH, a pioneer in industrial grade microwaves with leading designprinting machines and manufacturing experience based in Elz, Germany, for approximately $4.8 million. We believe that this acquisition enhancescontinuing to grow our position as the market leader of 3D sand production systems for industry. Industrial grade microwaves are used for thermally processing certain sand molds or cores that arerevenues from 3D printed using binders, such as phenolic binder, that require a drying process. Importantly, microwave technology improves casting quality and reduces production costs for customers in specific industries, such as magnesium parts for aviationother products, materials and steel alloy parts for hydraulic components. MWT designs and manufactures equipment that is currently employed in our PSC operations.services. We also plan to offer this technologycontinue to customers in future system sales. MWT’s microwave operation will be operationally integratedeffectively manage our costs of production and operating expenses such that we align our spending plans with the anticipated growth of our Augsburg, Germany manufacturing operations.

On March 6, 2014, we entered into an agreement with proALPHA Consulting GmbH to deploy an ERP system to promote operational efficiency and financial controls globally, including the supply of standard and individual software, customized programming and related services.business.

How We Measure Our Business

We use several financial and operating metrics to measure our business. We use these metrics to assess the progress of our business, make decisions on where to allocate capital, time and technology investments, and assess longer-term performance within our marketplace. The key metrics are as follows:

Revenue. Our revenue consists primarily of sales of our 3D printing machines and micromachinery3D printed and 3D printedother products, materials and other services.

3D printing machines and micromachinery.machines. 3D printing machine revenues consist of machine sales and micromachineryequipment under leasing arrangements. 3D printing machine sales generally include ancillary equipment, materials, installation and training services, the value of a warranty and other optional products and/or services. 3D printing machine sales are influenced by a number of factors including, among other things, (i) the adoption rate of our 3D printing technology, (ii) end-user product design and manufacturing activity, (iii) the capital expenditure budgets of end-users and potential end-users and (iv) the mix of products sold, all of which may be significantly influenced byother macroeconomic factors. Purchases of our 3D printing machines, and micromachinery, especiallyparticularly our higher-end, higher-priced systems, typically involve long sales cycles. Our 3D printing machine and micromachinery prices generally include machine installation, training, maintenance and the value of a

warranty. Several factors can significantly affect revenue reported for our 3D printing machines and micromachinery for a given period including, among others, (i) the overall low unit volume of 3D printing machine and micromachinery sales, (ii) the long lead timessales mix of our customers’ purchasing decisionsmachines for a given period and (iii) the customer-driven acceleration or delay of orders and shipments of a small number of machines.

3D printed and other products, materials and other services. 3D printed and other products, revenue is derived frommaterials and services consist of sales of (i) products printed in our global PSC network or manufactured through our ExCast strategy, (ii) consumable materials and replacement parts for our global installed base of PSCs located in the United States (5), Germany (1)3D printing machines and Japan (1). The(iii) services for maintenance and certain research and development activities. Our PSCs utilize our 3D printing machine technology to print products.products to the specifications of customers. In addition, our PSCs are also full-service operations that provide support and services such as pre-production collaboration prior to printing products for a customer. Revenue of materials depends upon the volume of consumables that we sell. Sales of our consumablesconsumable materials, replacement parts and service maintenance contracts are linked to the number of our 3D printing machines that are installed globally. Other research and active worldwide. Sales of consumablesdevelopment contracts are also driven by our customers’ machine usage, which is generally a function of the size of the particular machine and the habits and budget of the particular end-user. Larger machines generally use larger amounts of consumables due to their greater capacity and the higher levels of design andcustomer-specific needs in applying our additive manufacturing activity that are typical of an end-user who utilizes a larger machine.technologies.

Cost of Sales and Gross Profit. Our cost of sales consists primarily of labor (including service labor)(related to our global workforce), materials (including consumables)(for both the manufacture of 3D printing machines and for our PSC operations) and overhead to produce 3D printing machines and 3D printed and other products, materials and other services. Also included in cost of sales are license fees (based upon a percentage of revenue of qualifying products and processes) for the use of intellectual properties, warranty costs and other overhead associated with our production processes. Our 3D printing machines and micromachinery are manufactured at our facilities in Germany and the United States. The cost to manufacture machines consists of component parts, labor and production overhead. The cost of 3D printed products, materials and other services consist primarily of the material cost of our printed products, labor and overhead (including facilities expense and other conversion costs).

Our gross profit is influenced by a number of factors, the most important of which is the volume and mix of our 3D printing machinesmachine and micromachinery,3D printed and other products, materials and other services sold.

As 3D printing machine and micromachinery sales are cyclical, we will seek to achieve an equal balance in revenue from 3D printing machines and micromachinery3D printed and 3D printedother products, materials and other services in order to maximize gross profit while managing business risk. In addition, we expect to reduce our cost of sales over time by continued research and development activities directed towards achieving increased efficiencies in the production of 3D printing machines and micromachinery.machines. Our PSCs will also seek to achieve lower material cost and improve throughput.

We are continuously analyzing our supply chain to identify opportunities for better management, in partnership with our customers, in order to reduce the overall cost as a percentage of revenue in this area.

Operating Expenses.Our operating expenses consist of research and development expenses and selling, general and administrative expenses.

Research and development expenses. Our research and development expenses consist primarily of salaries and related personnel expenses aimed at developing new machinery and materials. Additional costs include the related software and materials, laboratory supplies, and costs for facilities and equipment. Research and development expenses are charged to operations as they are incurred. We capitalize the cost of materials, equipment and facilities that have future alternative uses in research and development projects or otherwise.

Selling, general and administrative expenses. Our selling, general and administrative expenses consist primarily of employee-related costs (salaries and benefits) of our executive officers, and sales and marketing (including sales commissions), finance, accounting, information technology and human resources personnel. Other significant general and administrative costs include the facility costs related to our United States and European headquarters in North Huntingdon, Pennsylvania and external costs for legal, accounting, consulting and other professional services.

Interest Expense. Interest expense consists of the interest cost associated with outstanding long-term debt and capital and financing lease arrangements. We expect our interest expense to continue to decrease as our outstanding debt is lowered over time. Included in our business strategy is the consideration of early retirement of debt (where practicable).

Provision for Income Taxes. Prior to our Reorganization, we were organized as a limited liability company. Under the provisions of the Internal Revenue Code and similar state provisions, we were taxed as a partnership and were not liable for income taxes. Instead, earnings and losses were included in the tax returns of our members. Therefore, for periods prior to Reorganization, theour consolidated financial statements do not reflect a provision for U.S. federal or state income taxes.

Following our Reorganization, we are taxed as a corporation for U.S. federal, state, local and foreign income tax purposes. Current statutory tax rates in the jurisdictions in which we operate, the United States, Germany, Italy and Japan, are approximately 39.0%40.0% (including state taxes), 29.5%31.1%, 31.4% and 38.0%35.6%, respectively.

Results of Operations

Summary

Net loss attributable to ExOne for 2014 was $21,843 or $1.52 per basic and diluted share, compared with a net loss attributable to ExOne of $6,455 or $0.51 per basic and diluted share for 2013. The increase in our net loss was principally due to (i) a decrease in our gross profit attributed to an unfavorable mix of sales and increases in production costs associated with the expansion of our global facilities and (ii) an increase in operating expenses attributed to increased spending in research and development activities (for materials qualification and machine development) and selling, general and administrative expense (due to increased personnel costs and an increase in provisions for bad debts).

Net loss attributable to ExOne for 2013 was $6,455 or $0.51 per basic and diluted share, compared with a net loss attributable to ExOne of $10,168 for 2012. The decrease in our net loss was principally due to an increase in our revenue and gross profit as a result of a significant increase in 3D printing machine and micromachinery sales for 2013 compared to 2012.

Net loss attributable to ExOne for 2012 was $10,168 compared with a net loss attributable to ExOne of $8,037 in 2011. The increase in our net loss was due to an increase in our operating expenses from 2012 compared to 2011, principally due to a non-recurring equity-based compensation charge and professional service fees incurred in preparation for our initial public offering. Offsetting the impact of the increase in operating expenses were (i) increases in our revenue and gross profit as a result of a significant increase in 3D printing machine sales for 2012 compared to 2011 and a reduction in license fee expense as a result of the amendment to our agreement with MIT and (ii) a decrease in interest expense as a result of a lower average outstanding debt balance.

Revenue

The following table summarizes revenue by product line for each of the years ending December 31:

Revenue for 2014 was $43,900 compared with revenue of $39,480 for 2013, an increase of $4,420, or 11.2%. This increase was principally due to an increase in revenues from 3D printed and other products, materials and services driven by (i) an overall continued increase in customer acceptance and demand for our additive manufacturing technologies, resulting in higher PSC volumes, (ii) an increase in revenues associated with our ExCast activities, (iii) an increase in the number of our 3D printing machines that are installed globally (resulting in higher materials and service revenues) and (iv) revenues attributable to MAM and MWT. Offsetting this increase was a decrease in revenues from 3D printing machines as a result of a reduction in volumes (one fewer unit sold as compared to 2013) and an unfavorable mix of sales of machines (based on the average selling price of machines sold) for 2014 as compared to 2013.

The following table summarizes the significant components of the change in revenue by product line for 2014 compared to 2013:

Revenue for 2013 was $39,480 compared with revenue of $28,657 for 2012, an increase of $10,823, or 37.8%. This increase was due principally to a higher volume of sales of 3D printing machines and micromachinery (29 for 2013 as compared to 13 for 2012), as well as 3D printed and other products, materials and other services based on a continued

increase in customer acceptance ofand demand for our additive manufacturing technologies. Offsetting increases in volume were decreases attributed to (i) an unfavorable mix of sales mix of machines, as a higher percentage of machines sold for the 2012 period were S-Max units, our highest price point machine, and (ii) net negative foreign currency movements associated with the devaluation of the Japanese Yen.

The following table summarizes the significant components of the change in revenue by product line for 2013 compared to 2012:

Revenue for 2012 was $28,657 compared with revenue of $15,290 in 2011, an increase of $13,367, or 87.4%. This increase was principally due to a higher volume of sales of 3D printing machines (13 in 2012 as compared to 5 in 2011) as well as 3D printed products, materials and other services.

The following table summarizes the significant components of the change in revenue by product line for 2012 compared to 2011:

The following table summarizes 3D printing machines sold by type for each of the years ending December 31 (please refer to the Our Machines and Machine Platforms section of Part I Item 1 of this Annual Report onForm 10-K for a description of 3D printing machines by type):

Cost of Sales and Gross Profit

Cost of sales for 2014 was $33,443 compared with cost of sales of $23,907 for 2013, an increase of $9,536, or 39.9%. Cost of sales as a percentage of revenue was 76.2% for 2014 compared with 60.6% for 2013.

Gross profit for 2014 was $10,457 compared with gross profit of $15,573 for 2013, a decrease of $5,116, or 32.9%. Gross profit percentage was 23.8% for 2014, compared with 39.4% for 2013. This decrease was principally as a result of (i) an unfavorable mix of sales of 3D printing machines versus sales of 3D printed and other products, materials and services, (ii) an increase in our production costs associated with the expansion of our global facilities (including increased personnel costs), (iii) costs incurred in connection with the development of our ExCast strategy and (iv) costs associated with our decision to discontinue our laser micromachining product line.

Cost of sales for 2013 was $23,907 compared with cost of sales of $16,514 for 2012, an increase of $7,393, or 44.8%. Cost of sales as a percentage of revenue was 60.6% for 2013 compared with 57.6% for 2012, an increase of 3.0%.2012.

Cost of sales for 2012 was $16,514 compared with cost of sales of $11,647 in 2011, an increase of $4,867, or 41.8%. Cost of sales as a percentage of revenue was 57.6% for 2012 compared with 76.2% in 2011, a decrease of 18.6%.

Gross profit for 2013 was $15,573 compared with gross profit of $12,143 for 2012, an increase of $3,430, or 28.2%. Gross profit percentage was 39.4% for 2013, compared with 42.4% for 2012, a decrease of 3.0%.2012. This decrease was due principally to our salesan unfavorable mix of sales of 3D printing machines versus sales of 3D printed and other products, in 2013 compared to 2012,materials and services, as well as an overall increase in our fixed overhead costs (as a result of opening two new production service centersPSCs and a general increaseincreases in our productive workforcepersonnel costs in anticipation of future increased volume output).

Gross profit for 2012 was $12,143 compared with gross profit of $3,643 in 2011, an increase of $8,500, or 233.4%. Gross profit percentage was 42.4% for 2012 compared with 23.8% in 2011, an increase of 18.6%. This increase was principally due to the increase in 3D printing machine volume for 2012 compared with 2011 (see table above) and a reduction in our license fees of $625 mostly due to the amendment to our agreement with MIT.

Operating Expenses

The following table summarizes the significant components of operating expenses for each of the years ending December 31:

Operating expenses for 2014 were $32,207 compared with operating expenses of $21,246 for 2013, an increase of $10,961, or 51.6%. Operating expenses as a percentage of revenue were 73.4% for 2014, compared with 53.8% for 2013.

Research and development expenses for 2014 were $8,178 compared with research and development expenses of $5,127 for 2013, an increase of $3,051, or 59.5%. This increase was due primarily to (i) increased costs associated with our materials qualification activities, including materials usage, professional fees and facilities costs associated with our materials development laboratory in the United States, (ii) continued investment in enhancing our 3D printing machine technology, including new machine development, for both direct and indirect printing and (iii) personnel costs associated with an increased headcount (including salaries, related benefits, travel expenses and equity-based compensation).

Selling, general and administrative expenses for 2014 were $24,029 compared with selling, general and administrative expenses of $16,119 for 2013, an increase of $7,910, or 49.1%. This increase was principally due to (i) personnel costs associated with an increased headcount (including salaries, related benefits, travel expenses and equity-based compensation), (ii) an increase in provisions for bad debts as a result of certain receivables experiencing deteriorating credit quality based on either customer-specific or macroeconomic factors, (iii) other growth-related expenses (consulting and professional fees), (iv) higher selling expenses (including higher sales commissions expense and increased trade show expenses), and (v) the impact of the MAM and MWT acquisitions (acquired in March 2014), principally amortization of identified intangible assets.

Operating expenses for 2013 were $21,246 compared with operating expenses of $20,215 for 2012, an increase of $1,031, or 5.1%. Operating expenses as a percentage of revenue were 53.8% for 2013, compared with 70.5% for 2012, a decrease of 16.7%.2012.

Research and development expenses for 2013 were $5,127 compared with research and development expenses of $1,930 for 2012, an increase of $3,197, or 165.6%. This increase was due primarily to (i) increased costs associated with our materials qualification activities, including additional research and development headcount, materials usage and facilities costs associated with our new materials development laboratory in the United States and (ii) continued investment in enhancing our 3D printing machine and micromachinery technology for both direct (metal) and indirect (sand) printing.

Selling, general and administrative expenses for 2013 were $16,119 compared with selling, general and administrative expenses of $18,285 for 2012, a decrease of $2,166, or 11.8%. This decrease was due principally to a net decrease in equity-based compensation expense for 2013 compared to 2012. The net decrease in equity-basedequity-

based compensation expense is as a result of the absence of $7,735 in expense for 2012 related to the sale of common units by the majority member of the former limited liability company to another member and two executives of the former limited liability company. Offsetting the net decrease in equity-based compensation were increases in selling, general and administrative expenses in 2013 compared to 2012 associated with (i) merger and acquisition related activities (approximately $400) following our secondary public offering of common stock in September 2013, (ii) increased professional service fees (including legal, audit and other consulting expenses), (iii) increased personnel costs associated with an increased headcount (including salaries and related benefits) in making the transition from a private company to a publicly traded company and (iv) increased selling costs (principally selling commissions for machine sale transactions).

Operating expenses for 2012 were $20,215 compared with operating expenses of $8,817 in 2011, an increase of $11,398, or 129.3%. Operating expenses as a percentage of revenue were 70.5% for 2012 compared with 57.7% in 2011, an increase of 12.8%.

Research and development expenses for 2012 were $1,930 compared with research and development expenses of $1,531 in 2011, an increase of $399, or 26.1%. This increase was mostly due to (i) continued investment in our 3D printing machine technology and (ii) increased costs associated with our materials qualification activities.

Selling, general and administrative expenses for 2012 were $18,285 compared with selling, general and administrative expenses of $7,286 in 2011, an increase of $10,999, or 150.1%. This increase was principally due to the aforementioned equity-based compensation expense of $7,735 associated with the sale of common units of the former limited liability company to another member and two executives of the former limited liability company during 2012. In addition, we incurred professional service fees (including legal, audit and other consulting expenses) of $2,328 in 2012 as compared to $469 in 2011. This increase is mostly attributable to costs incurred in preparation for our initial public offering, finalized in February 2013.

Interest Expense

Interest expense for 2014 was $144 compared with interest expense of $372 in 2013, a decrease of $228, or 61.3%. This decrease was due principally to a lower average outstanding debt balance for 2014, as compared to 2013, mostly due to (i) the retirement of the demand note payable to a member in February 2013 and (ii) the settlement of debt held by variable interest entities in connection with our acquisition of certain related assets of those entities in March 2013.

Interest expense for 2013 was $372 compared with interest expense of $842 in 2012, a decrease of $470, or 55.8%. This decrease was due principally to a lower average outstanding debt balance for 2013, as compared to 2012, mostly due to (i) the retirement of the demand note payable to a member in February 2013 and (ii) the settlement of debt held by variable interest entities in connection with our acquisition of certain related assets of those entities in March 2013.

Interest expense for 2012 was $842 compared with interest expense of $1,570 in 2011, a decrease of $728, or 46.4%. This decrease was principally due to a lower average outstanding debt balance in 2012 as compared to 2011, mostly due to the conversion of amounts payable on our demand note payable to member to redeemable preferred units in December 2011.

Other Income — Net

Other income — net for 20132014 was $98$210 compared with other income — net of $221$98 for 20122013 and other income — net of $158$221 for 2011.2012. Amounts for all periods consist principally of interest income on cash deposits and other financing activity benefits.

Provision for Income Taxes

The provision for income taxes for 2014, 2013 and 2012 was $159, $370 and 2011 was $370, $995, and $1,031, respectively, and in each of the respective years related entirely to the taxable income of ExOne GmbH.respectively. The effective tax rate for 2014, 2013 and 2012 was 0.7%, 6.2% and 2011 was 106.2%, 111.5% and 115.7%11.5% (provision on a loss), respectively. For 2014 and 2013, the effective tax rate differed from the U.S. federal statutory rate of 34.0% primarily due to net changes in valuation allowances for the period. For 2012, and 2011, the effective tax rate differed from the U.S. federal statutory rate of 34.0% primarily due to the effects of (i) limited liability company losses not subject to tax and (ii) net changes in valuation allowances for the period.

We have provided a valuation allowance for our net deferred tax assets as a result of our inability to generate consistent net operating profits in jurisdictions in which we operate. As such, any benefit from deferred taxes in any of the periods presented in our consolidated financial statements has been fully offset by changes in the valuation allowance for net deferred tax assets. We continue to assess our future taxable income by jurisdiction based on (i) our recent historical operating results, (ii) the expected timing of reversal of temporary differences, (iii) various tax planning strategies that we may be able to enact in future periods, (iv) the impact of potential operating changes on our business and (v) our forecast results from operations in future periods based

on available information at the end of each reporting period. To the extent that we are able to reach the conclusion that deferred tax assets are realizable based on any combination of the above factors, a reversal of existing valuation allowances may occur.

Noncontrolling Interests

There was no net income attributable to noncontrolling interests for 2014. Net income attributable to noncontrolling interests for 2013 was $138 compared with net income attributable to noncontrolling interests of $480 in 2012, a decrease of $342, or 71.3%. There was noChanges in net income attributable to noncontrolling interests for 2013 followingall periods are as a result of the acquisition of net assets in the related variable interest entities described immediately below, which was completed during the quarter ended March 31, 2013.

Net income attributable to noncontrolling interests for 2012 was $480 compared with net income attributable to noncontrolling interests of $420 in 2011, an increase of $60, or 14.3%. This increase was principally due to additional rental income (rental expense for ExOne) associated with 3D printing machines purchased by our variable interest entities, Lone Star and TMF.

Impact of Inflation

Our results of operations and financial condition are presented based on historical cost. While it is difficult to accurately measure the impact of inflation due to the imprecise nature of the estimates required, we believe the effects of inflation, if any, on our results of operations and financial condition are not significant.

Liquidity and Capital Resources

We incurred net losses of approximately $21,843, $6,317 and $9,688 for 2014, 2013 and $7,617 for 2013, 2012, and 2011, respectively. Prior to our Reorganization, we operated as a limited liability company and were substantially supported by the continued financial support provided by our majority member. In connection with the completion of our initial public offering in February 2013 and our secondary public offering in September 2013, we received total unrestricted net proceeds from the sale of our common stock of approximately $157,311. We believe that the unrestricted net proceeds obtained through these transactionsour existing capital resources will be sufficient to support our operations through January 1, 2015.2016.

The following table summarizes the significant components of cash flows for each of the years ending December 31:

Operating Activities

Cash used for operating activities for 2014 was $28,932 compared with $20,192 for 2013. The increase of $8,740, or 43.3%, was mostly attributed to an increase in our net loss and cash outflows associated with accounts receivable (based on the timing of sales and payments by customers) and inventories (based on an increase in manufacturing capacity). These amounts were offset by lower cash outflows associated with prepaid expenses and other current assets (based on a reduction in increases of prepayments to vendors) and deferred revenue and customer prepayments (mostly due to the timing and amount of prepayments by customers).

Cash used for operating activities for 2013 was $20,192 compared with $9,677 for 2012. The increase of $10,525,$10,515, or 108.8%108.7%, was mostly attributed to an increase in our net loss less depreciation and amortization expense and equity-based compensation of $2,964 mostly due to increased operating expenses following our public offering in February 2013 and net changes in assets and liabilities as a result of (i) an increase in outflows associated with inventories

(as (as a result of increases in global machine manufacturing activities), (ii) an increase in outflows associated with prepaid expenses and other current assets (attributed mostly to an increase in value-added taxes paid (refundable) and an increase in supplier prepayments), (iii) a decrease in inflows associated with accounts payable and accrued expenses and other liabilities (based on increased purchasing

activity and the timing of payment) and (iv) an increase in outflows associated with deferred revenue and customer prepayments (mostly due to the timing and amount of prepayments by customers). These amounts were offset by increased collections activity on accounts receivable.

Cash used for operating activities in 2012 was $9,677 compared with $2,436 in 2011. The increase of $7,241, or 297.2%, was attributed to increases in net working capital of $13,418 (mostly increases in accounts receivable and inventories as a result of increased selling and production activity) slightly offset by increases to accounts payable and accrued expenses, also linked to selling and production activity. The increase in net working capital was offset by an increase of cash earnings in 2012 of $6,177 (net income less non-cash items).

Investing Activities

Cash used for investing activities for 2014, was $32,236 compared with $21,638 for 2013. The increase of $10,598, or 49.0%, was primarily attributed to increased capital expenditures, mostly due to spending associated with (i) the expansion of our facilities in Germany and the United States to increase our 3D printing machine manufacturing, PSC, research and development and administrative facilities and (ii) the acquisition of the land and building associated with our Japanese subsidiary and cash paid for acquisitions (MAM and MWT).

Our 2015 capital expenditures plan includes approximately $5,000 to $7,000 in spending associated with continued facilities expansions and our ERP system deployment.

Cash used for investing activities for 2013, was $21,638 compared with $1,858 for 2012. The increase of $19,780, or 1064.6%, was primarily attributed to increased capital expenditures in 2013, mostly due to spending associated with (i) the expansion of our facilities in Germany to increase our 3D printing machine manufacturing, PSCs and other administrative facilities located there and (ii) costs associated with expanding our global PSC network, including the purchase of land and a manufacturing facility in North Las Vegas, Nevada. In addition, the cash flow effect of deconsolidating certain variable interest entities previously under our control also increased outflows from investing activities.

Our 2014 capital expenditures plan includes (i) completion of our new multi-use facility in Germany (estimated total costs of approximately $11,000 for 2014), (ii) the anticipated purchase and expansion of our existing Japanese facilities (estimated total costs of $7,300 for 2014), (iii) an expansion and further investment in our facilities in the United States (including our planned facility expansion for our direct metal printing operations in North Huntingdon, Pennsylvania), including capital expenditures associated with our materials qualification activities (ExMAL) (total estimated costs of approximately $4,000 for 2014), (iv) an increase in our global installed base of 3D printing machines and related equipment (estimated total costs of approximately $8,000 for 2014), (v) deployment of a global ERP system to support our business activities (estimated total costs of approximately $2,000 for 2014), and (vi) additional sustaining capital expenditures (estimated total costs of less than $1,000 for 2014).

In addition, on March 3, 2014 and March 6, 2014, respectively, we acquired two businesses (MAM and MWT) as part of our strategy to enhance our pre-print and post-print capabilities for a combined cost of approximately $9,800.

Cash used for investing activities for the year ended December 31, 2012 was $1,858 compared with $1,080 for the year ended December 31, 2011. The use of cash for each of the three years was attributed to capital expenditures, principally to support the construction of 3D printing machines at our facilities in the United States and Germany.

Financing Activities

Cash used for financing activities for 2014 was $677. Cash provided by financing activities for 2013 2012 and 20112012 was $137,512 and $11,011, respectively.

At December 31, 2014, we identified that we were not in compliance with the annual cash flow-to-debt service ratio covenant associated with our building note payable to a bank. We requested and $5,931, respectively.were granted a waiver related to compliance with this annual covenant through December 31, 2015. Related to our 2014 noncompliance, there were no cross default provisions or related impacts on other lending agreements.

At December 31, 2014, we identified that we were not in compliance with the annual equity ratio covenant associated with our line of credit agreement with a German bank. We did not obtain a waiver related to compliance with this annual covenant and believe our borrowing abilities to be restricted on the basis of an event of default under the agreement. At December 31, 2014 and 2013, there were no outstanding short-term borrowings or cash advances on the line of credit. Based on the cancellable nature of the agreement, any future requests for short-term borrowings or cash advances under this arrangement are subject to approval by the bank. Related to our 2014 noncompliance, there were no cross default provisions or related impacts on other lending agreements.

The principal use of cash for 2014 was $1,010 associated with principal payments on outstanding debt (including the payoff of debt assumed in connection with the MAM acquisition) and capital and financing leases offset by $333 in cash proceeds from the exercise of employee stock options.

The principal sources of cash for 2013 were (i) net proceeds from our initial public offering of $91,083 and (ii) net proceeds from our secondary public offering of $64,948. Offsetting these sources of cash were outflows of (i) $528 associated with the repayment of amounts outstanding on our German line of credit, (ii) $9,885 associated with the repayment of amounts outstanding on the demand note payable to member (which was

subsequently retired by us), (iii) $7,650 associated with the repayment of other outstanding debt and principal payments on financing leases, including repayment of all of the debt assumed from our VIEs in connection with the acquisition of net assets on March 27, 2013 and settlement of our financing lease obligation with a related party for a cash payment of approximately $1,372 during the quarter ended June 30, 2013, and (iv) $456 in preferred stock dividends paid prior to conversion of preferred stock to common stock upon closing of our initial public offering.

At December 31, 2013, we identified that we were not in compliance with the annual cash flow-to-debt service ratio covenant associated with our ExOne building note payable to a bank. We requested and were granted a waiver related to compliance with this covenant through December 31, 2014. Related to our 2013 noncompliance, there were no cross default provisions or related impacts on other lending agreements.

The principal sources of cash in 2012 were (i) net borrowings on our line of credit of $528 to support operations, (ii) net borrowings on the demand note payable to member of $8,629 to support operations, and (iii) proceeds from long-term debt and financing leases of $4,707 used to finance 3D printing machine production. Offsetting these sources of cash were long-term debt and financing lease repayments of $2,063.

The principal sources of cash in 2011 were (i) net borrowings on the demand note payable to member of $3,939 to support operations, (ii) proceeds from long-term debt of $2,398 used to finance 3D printing machine production and (iii) contributions from noncontrolling interests of $402. Offsetting these sources of cash were long-term debt repayments of $808.

Contractual Obligations

We are required to make future payments under various contracts, including operating lease and license agreements, construction services agreements,capital expenditure contracts, long-term debt agreements and capital and financing lease agreements. At December 31, 2013,2014, a summary of our outstanding contractual obligations is as follows: