Quarterlytics / Industrials / Manufacturing - Miscellaneous / Proto Labs, Inc.

Proto Labs, Inc.

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FY2015 Annual Report · Proto Labs, Inc.
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UNITED STATES 
 SECURITIES AND EXCHANGE COMMISSION 
Washington, D.C. 20549 
________________ 
 FORM 10-K 

(Mark One) 

☑ 

  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 
  For the fiscal year ended December 31, 2015 

or  

☐ 

  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 
  For the transition period from                      to                      

Commission File Number: 001-35435  
Proto Labs, Inc. 
(Exact name of Registrant as specified in its charter) 

Minnesota 
(State or other jurisdiction of incorporation or organization) 

41-1939628 
(I.R.S. Employer Identification No.) 

5540 Pioneer Creek Drive 
Maple Plain, Minnesota 
(Address of principal executive offices) 

55359 
(Zip Code) 

(763) 479-3680 
(Registrant’s telephone number, including area code) 
Securities registered pursuant to Section 12(b) of the Act: 

Title of Each Class 
Common Stock, Par Value $0.001 Per Share 

Name of Each Exchange on Which Registered 
New York Stock Exchange 

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 ☐ 

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 ☒ 

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 ☒  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 during the preceding 12 months (or for such shorter 
period that the Registrant was required to submit and post such files).  Yes  ☒  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.  ☒ 

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. 

Large accelerated filer ☒ 
Non-accelerated filer ☐ 
(Do not check if a smaller reporting company) 

Accelerated filer ☐ 
Smaller reporting company ☐ 

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Act).  Yes ☐  No ☒ 

As of June 30, 2015 (the last business day of the Registrant’s most recently completed second fiscal quarter), the aggregate market value 
of voting stock held by non-affiliates of the Registrant was approximately $1.6 billion. 

As of February 17, 2016, there were 26,201,818 shares of the Registrant’s common stock outstanding. 

DOCUMENTS INCORPORATED BY REFERENCE 
Portions of the Registrant’s Proxy Statement for its 2016 Annual Meeting of Shareholders are incorporated by reference to Part III of this 
Annual Report on Form 10-K. 

  
  
  
  
  
  
  
  
  
  
  
  
  
  
Table of Contents 

PART I 

Page 

Item 1. 
Business .......................................................................................................................................................  5 
Item 1A.  Risk Factors ..................................................................................................................................................  12 
Item 1B.  Unresolved Staff Comments ........................................................................................................................  26 
Properties .....................................................................................................................................................  26 
Item 2. 
Legal Proceedings ........................................................................................................................................  27 
Item 3. 
Mine Safety Disclosures ...............................................................................................................................  27 
Item 4. 

PART II 

Item 5. 

Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity 
Securities ......................................................................................................................................................  28 
Selected Financial Data ................................................................................................................................  29 
Item 6. 
Management's Discussion and Analysis of Financial Condition and Results of Operations ........................  32 
Item 7. 
Item 7A.  Quantitative and Qualitative Disclosures About Market Risk .....................................................................  46 
Financial Statements and Supplementary Data ............................................................................................  47 
Item 8. 
Item 9. 
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure .......................  75 
Item 9A.  Controls and Procedures ...............................................................................................................................  75 
Item 9B.  Other Information .........................................................................................................................................  75 

Item 10. 
Item 11. 
Item 12. 
Item 13. 
Item 14. 

Directors, Executive Officers and Corporate Governance ...........................................................................  76 
Executive Compensation ..............................................................................................................................  76 
Security Ownership of Certain Beneficial Owners and Management ..........................................................  76 
Certain Relationships and Related Transactions, and Director Independence .............................................  76 
Principal Accountant Fees and Services.......................................................................................................  76 

PART III 

Item 15. 

Exhibits and Financial Statement Schedules ................................................................................................  77 

PART IV 

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Special Note Regarding Forward Looking Statements 

Statements contained in this Annual Report on Form 10-K regarding matters that are not historical or current facts are 
“forward-looking statements” within the meaning of The Private Securities Litigation Reform Act of 1995. In some cases, 
you can identify forward-looking statements by the following words: “may,” “will,” “could,” “would,” “should,” “expect,” 
“intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “potential,” “continue,” “ongoing” or the negative 
of these terms or other comparable terminology, although not all forward-looking statements contain these words. These 
statements involve known and unknown risks, uncertainties and other factors which may cause our results to be materially 
different than those expressed or implied in such statements. In particular, some of the risks associated with our business 
include: 

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the level of competition in our industry and our ability to compete; 

our ability to respond to changes in our industry; 

our ability to effectively grow our business and manage our growth; 

our ability to continue to sell to existing and new customers; 

our ability to meet product developers’ and engineers’ needs and expectations regarding quick turnaround time, price
and specifications for quality; 

the adoption rate of e-commerce and 3D CAD software by product developers and engineers; 

our ability to process a large volume of designs and identify significant opportunities in our business; 

our ability to maintain and enhance our brand; 

our ability to successfully identify, complete and integrate acquisitions or other strategic transactions; 

the loss of key personnel or failure to attract and retain additional personnel; 

system interruptions at our operating facilities; 

possible unauthorized access to customers’ confidential information stored in our systems; and 

our ability to protect our intellectual property and not infringe on others’ intellectual property. 

       Certain of these factors and others are described in the discussion on risk factors that appear in Part I, Item 1A. “Risk 
Factors” of this Annual Report on Form 10-K and uncertainties detailed in this and other reports and filings with the Securities 
and Exchange Commission (SEC). Other unknown or unpredictable factors also could have material adverse effects on our 
future results. We cannot guarantee future results, levels of activity, performance or achievements. Accordingly, you should 
not  place  undue  reliance  on  these  forward-looking  statements.  Finally,  we  expressly disclaim  any  intent  or  obligation  to 
update any forward-looking statements to reflect subsequent events or circumstances. 

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Item 1. Business 

Overview 

PART I 

Proto Labs, Inc. was incorporated in Minnesota in 1999. The terms “Proto Labs,” the “Company,” “we,” “us,” and 
“our” as used herein refer to the business and operations of Proto Labs, Inc. and its subsidiaries. We are a leading online and 
technology-enabled,  quick-turn,  on-demand  manufacturer  of  custom  parts  for  prototyping  and  short-run  production.  We 
manufacture parts for product developers and engineers worldwide, who are under increasing pressure to bring their finished 
products to market faster than their competition. We utilize injection molding, computer numerical control (CNC) machining 
and 3D printing to manufacture custom parts for our customers. Our proprietary technology eliminates most of the time-
consuming and expensive skilled labor conventionally required to quote and manufacture parts. Our customers conduct nearly 
all of their business with us over the Internet. We target our products to the millions of product developers and engineers who 
use three-dimensional computer-aided design (3D CAD) software to design products across a diverse range of end-markets. 
We  have  established  our  operations  in  the  United  States,  Europe  and  Japan,  which  we  believe  are  three  of  the  largest 
geographic markets where these product developers and engineers are located. We believe our use of advanced technology 
enables us to offer significant advantages at competitive prices to many product developers and engineers and is the primary 
reason we have become a leading supplier of custom parts. 

We believe custom parts manufacturing has historically been an underserved market due to the inefficiencies inherent 
in the quotation, equipment set-up and non-recurring engineering processes required to produce custom parts. Our customers 
typically order low volumes of custom parts for a variety of reasons, including: 

● 

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they need a prototype to confirm the form, fit and function of one or more components of a product under 
development;  
they need an initial supply of parts to support pilot production for testing of a product;  
they need an initial supply of parts to support production while their high-volume production mold is being
prepared; 
they need on-demand manufacturing due to disruptions in their manufacturing process; 
their product will only be released in a limited quantity; or 
they need end-of-life production support.  

In  each  of  these  instances,  we  believe  our  solution  provides  product  developers  and  engineers  with  an  exceptional 
combination of speed, competitive pricing, ease of use and reliability that they typically cannot find among conventional 
custom parts manufacturers. Our technology enables us to ship parts as soon as the same day after receipt of a customer’s 
design submission. 

Our manufacturing product lines currently include injection molding (Protomold), CNC machining (Firstcut) and 3D 
printing (Fineline). We continually seek to expand the range of size and geometric complexity of the parts we can make with 
these processes, to extend the variety of materials we are able to support and to identify additional manufacturing processes 
to which we can apply our technology in order to better serve the evolving preferences and needs of product developers and 
engineers.  

We have experienced significant growth since our inception in 1999. We have grown our total revenue from $98.9 
million in 2011 to $264.1 million in 2015. We have grown our income from operations from $26.9 million in 2011 to $67.1 
million in 2015. 

Our increases in revenue and income from operations are due to our expansion of product lines offered. Product lines 

have expanded over the years by the introduction of: 

●  plastic injection molding in 1999; 
●  CNC machining in 2007; 
● 
liquid silicon rubber (LSR) that expanded the breadth and scope of our injection molding product line in 2014;
●  3D printing, including stereolithography (SL), selective laser sintering (SLS), and direct metal laser sintering 
(DMLS), through our acquisition of FineLine Prototyping, Inc. (FineLine) in 2014 and expanded through our
acquisition of certain assets, including shares of select subsidiaries, of Alphaform AG (Alphaform) in 2015;
and 

●  Lathe-turned parts that expanded the breadth and scope of our CNC product line in 2015. 

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Industry Overview 

Our Industry  

We  serve  product  developers  and  engineers  worldwide  who  bring  new  ideas  to  market  in  the  form  of  products 
containing one or more custom parts. Many of these product developers and engineers use 3D CAD software to create digital 
models representing their custom part designs that are then used to create physical parts for concept modeling, prototyping, 
functional testing, market evaluation or production. Custom prototype parts play a critical role in the product development 
process, as they provide product developers and engineers with the ability to test and confirm their intended performance 
requirements and explore design alternatives.  

Early  in  the  product  development  process,  3D  printing  processes  such  as  stereolithography  can  be  used  to  quickly 
produce an approximate physical representation of a part, but these representations may not meet product developers’ and 
engineers’ requirements for dimensional accuracy, cosmetics or material properties. As an alternative, 3D printing processes 
such as selective laser sintering and direct metal laser sintering or CNC machining can be used to produce low volumes of 
high-quality custom parts in either metal or plastic. For follow-on functional testing, market evaluation and production runs, 
parts are typically manufactured using injection molding.  

Our Solution 

We have developed proprietary software and advanced manufacturing processes that automate much of the skilled labor 
conventionally required in quoting, production engineering and manufacturing of custom parts. We believe our interactive 
web-based interface and highly automated processes address the desires of many product developers and engineers for a fast, 
efficient and cost-effective means to obtain custom parts and are the primary reasons we have become a leading supplier of 
custom parts. 

Key elements of our solution include: 

Sophisticated Technology that Reduces Turnaround Time 

Our  web-based  interface  and  proprietary  software  automate  many  of  the  manual  and  time-consuming  processes 
typically required to obtain custom 3D-printed, CNC-machined or injection-molded parts from conventional suppliers. Our 
platform  automates  many  aspects  of  the  entire  process  from  design  submission  through  manufacturability  analysis  and 
feedback,  quotation,  order  submission,  mold  design,  tool  path  generation  and  mold  or  part  manufacture.  To  utilize  our 
platform, a prospective customer uploads a 3D CAD file of their required part through our website. Often within minutes of 
design submission, our software analyzes the manufacturability of the part, assesses our ability to make the part, and returns 
a  firm  price  quotation  with  any  recommendations  for  design  modifications.  In  the  case  of  CNC  machining,  this 
manufacturability analysis identifies features that may be too fragile to be machined and areas that cannot be machined at all. 
For  injection  molding,  problematic  features  such  as  undercuts,  thin  areas,  thick  areas  and  areas  requiring  geometry 
adjustments to allow the part to be ejected from the mold are identified. Many of our customers find this analysis particularly 
helpful,  as  it  diagnoses  and  prevents  potential  problems  prior  to  manufacturing.  We  can  also  provide  a  flow  analysis  to 
identify  parts  that  may  be  so  thin  and  large  that  plastic  will  solidify  before  the  mold  can  be  completely  filled.  Our 
manufacturability analysis plays a significant role in our automated pricing algorithms. 

Our quoting system is highly interactive, enabling our prospective customers to change the material, finish, quantity or 
shipping schedule of orders, and to instantly receive an updated quotation. Once an order is received, our software automates 
much of the manual engineering and skilled labor that is normally required to manufacture parts. As a result, in many cases 
we are able to quote orders in minutes and ship parts as soon as the same day ordered. 

Scale to Process Large Numbers of Unique Part Designs 

Our  proprietary,  highly  scalable  quoting  technology  addresses  the  manual  processes  conventionally  involved  in 
submitting  a  design,  analyzing  its  manufacturability,  making  design  revision  recommendations  and  generating  price 
quotations. This enables us to quickly analyze high volumes of 3D CAD part design submissions and provide feedback to 
our prospective product developer and engineer customers. In 2015 alone, we generated quotations for over 550,000 design 
submissions.  Our  proprietary  manufacturing  automation  technology  is  also  highly  scalable,  enabling  us  to  process  large 
numbers of unique designs and, combined with our manufacturing processes, efficiently and effectively manufacture high 
volumes of parts to meet the needs of product developers and engineers. 

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Enhanced Customer Experience 

Our  web-based  customer  interface  provides  a  straightforward  means  of  submitting  3D  CAD  part  designs.  Our 
proprietary  manufacturability  analysis  then  quickly  analyzes  whether  a  part  design  falls  within  our  manufacturing 
capabilities.  In  many  cases,  our  software  provides  suggested  design  modifications  to  enhance  manufacturability,  which 
is presented to the product developer or engineer in an interactive quotation containing a color-coded 3D representation of 
the part. This allows product developers and engineers to quickly determine the manufacturability of their parts, understand 
the cost and when they can be shipped. Our interactive quotations provide instant visibility into the impact of changing an 
order’s various parameters such as material, finish, quantity or shipping schedule. As a result, we provide product developers 
and engineers with an easy-to-use and consistent means to obtain custom parts. 

Attractive Custom Pricing 

         Based on internal market research, we believe we generally have competitive pricing on custom orders. We believe this 
is a direct result of our technology and the efficiency of our operations, both of which were designed specifically for custom 
parts production. By limiting these costs, we can typically offer attractive pricing not normally possible in the custom parts 
market, and as a result, we can typically offer product developers and engineers competitive prices on custom manufactured 
parts.  

Monitoring and Control 

We have developed a proprietary, intranet-based monitoring and control system that allows us to monitor key aspects 
of our entire worldwide operations in real time using an easy-to-understand management dashboard. This system provides us 
with the ability to quickly react to new information across our organization. 

Our Product Lines 

Our 3D Printing (Fineline), CNC Machining (Firstcut) and Injection Molding (Protomold) product lines offer many 
product developers and engineers the ability to quickly and efficiently outsource their quick-turn custom parts manufacturing. 
See Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” for the historical 
revenue generated by each of 3D Printing (Fineline), CNC Machining (Firstcut) and Injection Molding (Protomold). 

3D Printing (Fineline) 

Our 3D Printing (Fineline) product line includes SL, SLS and DMLS processes, which offers customers a wide-variety 
of high-quality, precision rapid prototyping and low volume production. These processes create parts with a high level of 
accuracy, detail, strength and durability. 3D Printing is well suited to produce small quantities, typically in the range of one 
to 50 parts. 

CNC Machining (Firstcut) 

Our CNC Machining (Firstcut) product line uses commercially available CNC machines to cut plastic or metal blocks 
into one or more custom parts based on the 3D CAD model uploaded by the product developer or engineer. Our efficiencies 
derive from the automation of the programming of these machines and a proprietary fixturing process. The CNC Machining 
(Firstcut) product line is well suited to produce small quantities, typically in the range of one to 200 parts. 

Injection Molding (Protomold) 

Our Injection Molding (Protomold) product line uses our 3D CAD-to-CNC machining technology for the automated 
design and manufacture of thermoplastic, metal or liquid silicone injection molds, which are then used to produce custom 
injection-molded parts on commercially available equipment. Our Injection Molding (Protomold) product line is used for 
prototype, on-demand and short-run production. Prototype quantities typically range from 25 to 100 parts. Because we retain 
possession of the molds, customers who need short-run production often come back to Proto Labs’ Injection Molding product 
line for additional quantities typically ranging up to 10,000 parts or more. They do so to support pilot production for product 
testing or while their tooling for high-volume production is being prepared, because they need on-demand manufacturing due 
to disruptions in their manufacturing process, because their product will only be released in a limited quantity or because 
they need end-of-life production support. These additional part orders typically occur on approximately half of the molds that 
we make, typically accounting for approximately half of our total Injection Molding (Protomold) revenue. 

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Our Process 

The process for 3D Printing (Fineline), CNC Machining (Firstcut) and Injection Molding (Protomold) begins when the 
product developer or engineer uploads one or more 3D CAD models representing the desired part geometry. Our proprietary 
software uses complex algorithms to analyze the 3D CAD geometry, analyze its manufacturability and support the creation 
of an interactive, web-based quotation containing pricing and manufacturability information. A link to the quotation is then 
e-mailed  to  the  product  developer  or  engineer,  who  can  access  the  quotation,  change  a  variety  of  order  parameters  and 
instantly  see  the  effect  on  price  before  finalizing  the  order.  For  3D  Printing  (Fineline),  the  quote  is  reviewed  and  then 
scheduled for production. For CNC Machining (Firstcut), the tool paths are then reviewed and routed to our high-speed CNC 
machining centers for execution. In the case of Injection Molding (Protomold), our proprietary software supports the creation 
of  the  mold design  and  the  tool  paths  required  to  manufacture  the  mold  components, which  are  then  routed  to  our CNC 
machining centers for execution. Once the mold is assembled, it is placed in one of our injection molding presses to create 
the required parts. For our CNC Machining (Firstcut) product line, we ship parts as soon as the same day as the order is 
received. For our Injection Molding (Protomold) and 3D Printing (Fineline) product lines, we ship parts in as little as one 
business day from design submission. We ship our parts via small parcel common carriers on standard terms and conditions.  

 Our Growth Strategy 

The principal elements of our growth strategy are to: 

Expand the Customer Base 

We plan to expand our customer base to serve more product developers and engineers within the companies that have 
already used our product lines. Individual product developers and engineers typically make or influence the choice of vendor 
when sourcing custom parts. We believe a significant opportunity exists for us to leverage highly satisfied product developers 
and engineers to encourage others within the same organization to utilize our product lines. We have historically generated a 
significant number of new customers through word-of-mouth referrals from other product developers and engineers, and 
combine  these  referrals  with  the  efforts of  our  marketing  and  sales  force  to  identify  and  market  our  product  lines  to  the 
colleagues of our existing customers. 

We also plan to use our marketing and sales capabilities to continue to pursue product developers and engineers within 
companies who have not yet used our products. Our presence in geographic regions that have high populations of 3D CAD 
users provides us with a broad universe of potential new customer companies on which to focus our marketing and sales 
efforts. 

We believe there may be opportunities to grow by identifying and expanding into select additional geographic markets. 
We currently operate in the United States, Europe and Japan, where we believe a substantial portion of the world’s product 
developers and engineers are located. We entered the European market in 2005 and launched operations in Japan in 2009. 
For 2015, revenue earned in these markets represents approximately 21% of our total revenue. While we currently do not 
have specific plans to expand into any particular geographic markets, we believe opportunities exist to serve the needs of 
product developers and engineers in select new geographic regions and we will continue to evaluate such opportunities if and 
when they arise.  

We  plan  to  further  enhance  the  functionality  and  ease  of  use  of  our  platform  and  expand  the  capabilities  of  our 
technology  in  order  to  further  increase  automation  and  meet  the  evolving  needs  of  product  developers  and  engineers 
worldwide.  We  believe  product  developers  and  engineers  have  come  to  expect  advanced  web-based  tools  and  a  fully 
integrated  Internet  platform  from  their  vendors.  We  will  continue  to  use  the  Internet  to  provide  product  developers  and 
engineers with a standardized interface through which they can upload their 3D CAD models and obtain firm, interactive 
quotations quickly and efficiently. 

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Add Manufacturing Processes 

We seek to identify additional manufacturing processes to which we can apply our technology and expertise to meet a 
greater range of product developers’ and engineers’ needs. Introducing new manufacturing processes can both attract new 
customers and provide us with a significant opportunity to cross-sell our existing product lines to our existing customer base. 
We  regularly  evaluate  new  manufacturing  processes  to  offer  product  developers  and  engineers  and  introduce  such  new 
processes  when  we  are  confident  that  a  sufficient  market  demand  exists  and  that  we  can  offer  the  same  advantages  our 
customers have come to expect from us. See Item 6. “Selected Financial Data” for disclosure of our historical research and 
development expenses. 

Examples of new manufacturing processes we have added include CNC Machining (Firstcut), 3D printing through the 
acquisitions of FineLine and Alphaform and the launch of liquid silicone rubber injection molding and lathe-turned parts. 
Our CNC Machining (Firstcut) product line was first introduced in the United States in 2007 and has grown to represent 28% 
of our total revenue in the year ended December 31, 2015. In April 2014, we added 3D-printing technologies through our 
acquisition  of  FineLine  and  further  expanded  our  3D  printing  capabilities  in  October  2015  through  our  acquisition  of 
Alphaform. During 2014, we introduced liquid silicone rubber injection molding and in February 2015, we introduced lathe-
turned products to further expand our product offerings.  

Broaden the Parts Envelope 

We regularly analyze the universe of customer design submissions that we are currently unable to manufacture and 
focus a portion of our research and development efforts to expand the range of parts that we can produce. Since we first 
introduced  our  Injection  Molding  (Protomold)  product  line  in  1999,  we  have  steadily  expanded  the  size  and  geometric 
complexity of the injection-molded parts we are able to manufacture, and we continue to extend the diversity of materials we 
are able to support. Similarly, since first introducing our CNC Machining (Firstcut) product line in 2007, we have expanded 
the range of part sizes, design geometries and materials we can support. As we continue to expand the range of our existing 
process capabilities, we believe we will meet the needs of a broader set of product developers and engineers and consequently 
convert a higher number of quotation requests into orders. 

Marketing 

Our international marketing effort generates prospects for our sales teams and seeks to strengthen our reputation as an 
industry  leader  in  rapid  custom  prototyping  and  low-volume  manufacturing.  Since  we  are  an  agile,  technology-based 
company, much of our marketing activities occur online. We use marketing automation software to enhance the productivity 
of our marketing and sales teams and continuously track the results of every campaign to ensure our return on investment. 

We  maintain  top-of-mind  brand  awareness  with  product  developers  and  engineers  through  regular  publication  of 
technical information including design guidelines and helpful tips, engineering white papers, educational webinars, quick 
videos, and a quarterly journal focused on important industry topics. We also provide complimentary physical design aids to 
designers and engineers — as well as teachers and students — that highlight technical aspects of injection molding to help 
create efficient, well-designed parts. We believe these educational materials are key aspects of our lead generation efforts. 

In our Cool Idea! Award program, we grant up to $250,000 in manufacturing services annually to entrepreneurs with 
innovative ideas. In addition to supporting entrepreneurs and creative product development, we feel this program generates 
good will, press coverage and word-of-mouth brand awareness. 

Marketing represents the face of Proto Labs, so it is our goal to actively and intelligently engage designers and engineers 
across multiple mediums — whether print, online, social media or in person. By doing this, we gain new customers, drive 
sales and build brand equity. 

Sales and Customer Service 

We maintain an internal sales team trained in the basics of part design and the capabilities of our manufacturing product 
lines, as well as the key advantages of our product lines over alternate methods of custom parts manufacturing. We organize 
our sales team into complementary roles: business development, account management and strategic account management, 
with the former focused on selling to new customer companies and the latter two focused on expanding sales within existing 
customer companies. We believe our sales staff is adept at researching customer companies and networking to find additional 
product developers and engineers who may have a need for our products. We also have a team of customer service engineers 
who can support highly technical engineering discussions with product developers and engineers as required during the sales 

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process. Our revenue is generated from a diverse customer base, with no single customer company representing more than 
2% of our total revenue in 2015. 

Competition 

The  market  for  custom  parts  manufacturing  is  fragmented,  highly  competitive  and  subject  to  rapid  and  significant 

technological change. Our potential competitors include: 

•  Captive in-house product manufacturing. Many larger companies undertaking product development have established
additive  rapid  prototyping,  CNC  machining  or  injection  molding  capabilities  internally  to  support  prototyping  or
manufacturing requirements of their product developers and engineers. 

•  Other custom parts manufacturers. There are thousands of alternative manufacturing machine shops, injection molding
suppliers, 3D printing service bureaus and vendors worldwide. The size and scale of these businesses range from very
small specialty shops to large, high-volume production manufacturers. 

We believe that the key competitive factors in our industry include: 

•  Speed: turnaround time for quotations and parts; 

•  Price: mold and part pricing; 

•  Service: overall customer experience, from web interface to post-sales support; 

•  Capability: range of part sizes and dimensional complexities supported, variety of manufacturing processes offered,

materials supported and post-processing provided; 

•  Quality: dimensional accuracy, surface finish, material properties, color and cleanliness; 

•  Scale: ability to support multiple part designs in parallel; and 

•  Capacity: ability to manage peaks in demand. 

We believe that we have competitive strengths that position us favorably and have enabled us to become a leader in our 
markets.  We  also  believe  that  substantially  all  of  our  current  direct  competitors  are  relatively  small  in  terms  of  size  of 
operations,  revenue,  number  of  customers  and  volume  of  parts  sold,  and  generally  lack  our  technological  capabilities. 
However, our industry is evolving rapidly and other companies, including potentially larger and more established companies 
with developed technological capabilities, may begin to focus on custom parts manufacturing. These companies could more 
directly compete with us, along with our existing competitors, and could also launch new products and product lines that we 
do  not  offer  that  may  quickly  gain  market  acceptance.  Any  of  the  foregoing  could  adversely  affect  our  ability  to  attract 
customers. 

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Intellectual Property 

We  regard  our  patents,  trademarks,  service  marks,  trade  dress,  trade  secrets,  copyrights,  domain  names  and  other 
intellectual property as valuable to our business and rely on patent, trademark and copyright law, trade secret protection and 
confidentiality and/or license agreements with our employees, customers, vendors and others to protect our proprietary rights. 
We register our patents, trademarks and service marks in the United States and other jurisdictions as we deem appropriate. 
As of December 31, 2015, we owned and had applications pending for patents relating to various aspects of our quoting and 
manufacturing processes as follows: 

Jurisdiction 
United States ............................................................................................     
United Kindgom .......................................................................................     
Germany ...................................................................................................     

Issued Patents 
16  
2  
0  

     Applications Pending   

3  
0  
2  

Our  patents  have  expiration  dates  ranging  from  2022  to  2032.  We  also  owned  approximately  13  registered  and  2 
pending United States trademarks or service marks as of December 31, 2015, with corresponding registered protection in 
Europe  and  Japan  for  the  most  important  of  these  marks  such  as  PROTO  LABS,  PROTOMOLD,  FIRSTCUT, 
PROTOQUOTE, FIRSTQUOTE, PROTOFLOW and FINELINE, corresponding approved protection in Canada for PROTO 
LABS,  FIRSTCUT  and  FINELINE,  and  corresponding  registered  protection  in  Australia,  Canada  and  Mexico  for 
PROTOMOLD. There can be no assurance that the steps we take to protect our proprietary rights will be adequate or that 
third parties will not infringe or misappropriate such rights. We have been subject to claims and expect to be subject to legal 
proceedings and claims from time to time in the ordinary course of our business. In particular, we may face claims from third 
parties  that  we  have  infringed  their  patents,  trademarks  or  other  intellectual  property  rights.  Such  claims,  even  if  not 
meritorious, could result in the expenditure of significant financial and managerial resources. Any unauthorized disclosure 
or use of our intellectual property could make it more expensive to do business and harm our operating results. 

Employees 

As of December 31, 2015, we had 1,549 full-time employees. We consider our current relationship with our employees 
to be good. We also regularly use independent contractors and other temporary employees across the organization to augment 
our regular staff. We believe that our future success will depend in part on our continued ability to attract, hire and retain 
qualified personnel. 

Available Information 

Our  principal  executive  offices  are  located  at  5540  Pioneer  Creek  Drive,  Maple  Plain,  Minnesota  55359  and  our 
telephone  number  is  (763)  479-3680.  Our  website  address  is  www.protolabs.com.  Information  on  our  website  does  not 
constitute part of this Annual Report on Form 10-K or any other report we file or furnish with the SEC. We provide free 
access to various reports that we file with or furnish to the SEC through our website as soon as reasonably practicable after 
they have been filed or furnished. These reports include, but are not limited to, our Annual Reports on Form 10-K, Quarterly 
Reports on Form 10-Q, Current Reports on Form 8-K and any amendments to these reports. Our SEC reports can be accessed 
through the investor relations section of our website or through the SEC’s website at www.sec.gov.  

Executive Officers of the Registrant  

Set forth below are the names of our current executive officers, their ages, titles, the year first appointed as an executive 

officer, and employment for the past five years:  

Victoria M. Holt ..............  58  President, Chief Executive Officer and Director 
Robert Bodor ...................  43  Vice President/General Manager – Americas 
John A. Way ....................  43  Chief Financial Officer and Executive Vice President of Development 
Donald G. Krantz ............  60  Executive Vice President and Technology Officer 
Jacqueline D. Schneider ..  51  Vice President of Global Sales 
John B. Tumelty ..............  45  Vice President/General Manager and Managing Director – Europe, Middle East and Africa 

Executive officers of the Company are elected at the discretion of the board of directors with no fixed terms. There are 

no family relationships between or among any of the executive officers or directors of the Company.  

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Victoria M. Holt. Ms. Holt has been our President and Chief Executive Officer since February 2014. Prior to joining 
Proto Labs, Ms. Holt served as President and Chief Executive Officer of Spartech Corporation, a leading producer of plastic 
sheet, compounds and packaging products, from September 2010 until Spartech was purchased by PolyOne Corporation in 
March 2013. Ms. Holt also is a member of the Board of Directors of Waste Management, Inc.  

Robert Bodor. Dr. Bodor has served as our Vice President/General Manager - Americas since January 2015. From July 
2013 to January 2015, Dr. Bodor served as our Chief Technology Officer. From December 2012 to June 2013, Dr. Bodor 
served as our Director of Business Development. Prior to joining Proto Labs, from January 2011 to December 2012, Dr. 
Bodor held several roles at Honeywell, most recently leading SaaS business offerings for Honeywell’s Life Safety Division.. 

John A. Way. Mr. Way has served as our Chief Financial Officer and Executive Vice President of Development since 
December 2014. From October 2013 to September 2014, Mr. Way served as Chief Financial Officer of Univita Health Inc., 
a privately held home healthcare service provider. From September 2012 to July 2013, Mr. Way served as Chief Financial 
Officer of Virtual Radiologic, a global telemedicine company. From October 2002 to November 2012, Mr. Way worked in 
senior  financial  positions  at  several  divisions  within  UnitedHealth  Group,  including  Chief  Financial  Officer  of  Optum 
Collaborative Care, SecureHorizons and OptumHealth.  

Donald G. Krantz. Dr. Krantz has served as our Executive Vice President and Technology Officer since January 2015. 
From January 2007 to January 2015, Dr. Krantz served as our Chief Operating Officer. From November 2005 to January 
2007, Dr. Krantz served as our Vice President of Development. Dr. Krantz was an Engineering Fellow at Alliant Techsystems 
and  Honeywell,  Inc.,  and  was  named  the  2005  Distinguished  Alumnus  of  the  Department  of  Computer  Science  and 
Engineering at the University of Minnesota.  

Jacqueline D. Schneider. Ms. Schneider has served as our Vice President of Global Sales since January 2015. From 

February 2007 to January 2015, Ms. Schneider served as our Vice President of Sales and Customer Service.  

John B. Tumelty. Mr. Tumelty has served as the Vice President/General Manager and Managing Director – Europe, 
Middle East and Africa since January 2015. Mr. Tumelty served as the Managing Director of Proto Labs, Limited from its 
inception in July 2005 to January 2015. Mr. Tumelty leads our company’s operations in Europe.  

Item 1A. Risk Factors 

The  following  are  the  significant  factors  that  could  materially  adversely  affect  our  business,  financial  condition,  or 

operating results, as well as adversely affect the value of an investment in our common stock. 

Risks Relating to Our Business 

We face significant competition and expect to face increasing competition in many aspects of our business, which could 
cause our operating results to suffer. 

The market for custom parts manufacturing is fragmented and highly competitive. We compete for customers with a 
wide variety of custom parts manufacturers and methods. Some of our current and potential competitors include captive in-
house  product  lines,  other  custom  parts  manufacturers  and  alternative  manufacturing  vendors  such  as  those  utilizing  3D 
printing processes including stereolithography (SL), selective laser sintering (SLS) and direct metal laser sintering (DMLS). 
Moreover, some of our existing and potential competitors are researching, designing, developing and marketing other types 
of products and product lines. We also expect that future competition may arise from the development of allied or related 
techniques for custom parts manufacturing that are not encompassed by our patents, from the issuance of patents to other 
companies  that  may  inhibit  our  ability  to  develop  certain  products  and  from  improvements  to  existing  technologies. 
Furthermore,  our  competitors  may  attempt  to  adopt  and  improve  upon  key  aspects  of  our  business  model,  such  as 
development  of  technology  that  automates  much  of  the  manual  labor  conventionally  required  to  quote  and  manufacture 
custom parts, implementation of interactive web-based and automated user interface and quoting systems and/or building 
scalable operating models specifically designed for efficient custom production. Third-party CAD software companies may 
develop  software  that  mold-makers,  injection  molders  and  CNC  machine  shops  could  use  to  compete  with  our  business 
model. Additive manufacturers may develop stronger, higher temperature resins or introduce other improvements that could 
more effectively compete with us on part quality. We may also, from time to time, establish alliances or relationships with 
other competitors or potential competitors. To the extent companies terminate such relationships and establish alliances and 
relationships with our competitors, our business could be harmed. 

Existing  and  potential  competitors  may  have  substantially  greater  financial,  technical,  marketing  and  sales, 
manufacturing,  distribution  and  other  resources  and  name  recognition  than  us,  as  well  as  experience  and  expertise  in 
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intellectual property rights and operating within certain international locations, any of which may enable them to compete 
effectively against us. 

Though we plan to continue to expend resources to develop new technologies, processes and product lines, we cannot 
assure you that we will be able to maintain our current position or continue to compete successfully against current and future 
sources of competition. Our challenge in developing new products is finding product lines for which our automated quotation 
and manufacturing processes offer an attractive value proposition, and we may not be able to find any new product lines with 
potential economies of scale similar to our molding and machining product lines. If we do not keep pace with technological 
change and introduce new technologies, processes and product lines, the demand for our products and product lines may 
decline and our operating results may suffer. 

Our success depends on our ability to deliver products and product lines that meet the needs of product developers and 
engineers and to effectively respond to changes in our industry. 

We derive almost all of our revenue from the manufacture and sale to product developers and engineers of quick-turn 
low volumes of custom parts for prototyping, support of internal manufacturing and limited quantity product release. Our 
business  has  been,  and,  we  believe,  will  continue  to  be,  affected  by  changes  in  product  developer  and  engineering 
requirements and preferences, rapid technological change, new product and product line introductions and the emergence of 
new  standards  and  practices,  any  of  which  could  render  our  technology,  products  and  product  lines  less  attractive, 
uneconomical or obsolete. To the extent that our customers’ need for quick-turn parts decreases significantly for any reason, 
it would likely have a material adverse effect on our business and operating results and harm our competitive position. In 
addition, CAD simulation and other technologies may reduce the demand for physical prototype parts. Therefore, we believe 
that to remain competitive, we must continually expend resources to enhance and improve our technology, product offerings 
and product lines. 

In particular, we plan to increase our research and development efforts and to continue to focus a significant portion of 
those efforts to further develop our technology in areas such as our interactive user interface and manufacturing processes, 
potentially introduce new manufacturing processes within the research and development initiative we refer to as Protoworks, 
and broaden the range of parts that we are able to manufacture. We believe successful execution of this part of our business 
plan is critical for our ability to compete in our industry and grow our business, and there are no guarantees we will be able 
to do so in a timely fashion, or at all. Broadening the range of parts we offer is of particular importance since limitations in 
manufacturability are the primary reason we are not able to fulfill many quotation requests. There are no guarantees that the 
resources devoted to executing on this aspect of our business plan will improve our business and operating results or result 
in increased demand for our products and product lines. Failures in this area could adversely impact our operating results and 
harm our reputation and brand. Even if we are successful in executing in these areas, our industry is subject to rapid and 
significant technological change, and our competitors may develop new technologies, processes and product lines that are 
superior to ours. Our research and development costs were approximately $18.4 million, $16.6 million and $11.9 million for 
the years ended December 31, 2015, 2014 and 2013, respectively, and there is no guarantee that these costs will enable us to 
maintain or grow our revenue profitability. Refer to Item 7. “Management’s Discussion and Analysis of Financial Condition 
and Results of Operations” in this Annual Report on Form 10-K for additional discussion related to research and development 
costs. 

Any failure to properly meet the needs of product developers and engineers or respond to changes in our industry on a 
cost-effective and timely basis, or at all, would likely have a material adverse effect on our business and operating results 
and harm our competitive position. 

Our failure to meet our product developers’ and engineers’ expectations regarding quick turnaround time would adversely 
affect our business and results of operations. 

We believe many product developers and engineers are facing increased pressure from global competitors to be first to 
market with their finished products, often resulting in a need for quick turnaround of custom parts. We believe our ability to 
quickly quote, manufacture and ship custom parts has been an important factor in our results to date. There are no guarantees 
we  will  be  able  to  meet  product  developers’  and  engineers’  increasing  expectations  regarding  quick  turnaround  time, 
especially as we increase the scope of our operations. If we fail to meet our customers’ expectations regarding turnaround 
time in any given period, our business and results of operations will likely suffer. 

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Our failure to meet our product developers’ and engineers’ price expectations would adversely affect our business and 
results of operations. 

Demand for our product lines is sensitive to price. We believe our competitive pricing has been an important factor in 
our results to date. Therefore, changes in our pricing strategies can have a significant impact on our business and ability to 
generate revenue. Many factors, including our production and personnel costs and our competitors’ pricing and marketing 
strategies, can significantly impact our pricing strategies. If we fail to meet our customers’ price expectations in any given 
period, demand for our products and product lines could be negatively impacted and our business and results of operations 
could suffer. 

Our failure to meet our product developers’ and engineers’ quality specifications would adversely affect our business and 
results of operations. 

We believe many product developers and engineers have a need for specific quality of quick-turn, on-demand custom 
parts. We believe our ability to create parts with the specifications of the product developers and engineers is an important 
factor in our results to date. If we fail to meet our customers’ specifications in any given period, demand for our products and 
product lines could be negatively impacted and our business and results of operations could suffer. 

The strength of our brand is important to our business, and any failure to maintain and enhance our brand would hurt 
our ability to retain and expand our customer base as well as further penetrate existing customers. 

Since our products and product lines are sold primarily through our websites, the success of our business depends upon 
our ability to attract new and repeat customers to our websites in order to increase business and grow our revenue. Customer 
awareness and the perceived value of our brand will depend largely on the success of our marketing efforts, as well as our 
ability to consistently provide quality custom parts within the required timeframes and positive customer experiences, which 
we may not do successfully. A primary component of our business strategy is the continued promotion and strengthening of 
our brand, and we have incurred and plan to continue to incur substantial expense related to advertising and other marketing 
efforts directed toward enhancing our brand. We have initiated marketing efforts through social media, but this method of 
marketing may not be successful and subjects us to a greater risk of inconsistent messaging and bad publicity. We may choose 
to increase our branding expense materially, but we cannot be sure that this investment will be profitable. If we are unable to 
successfully  maintain  and  enhance  our  brand,  this  could  have  a  negative  impact  on  our  business  and  ability  to  generate 
revenue. 

Our business depends in part on our ability to process a large volume of new part designs from a diverse group of product 
developers and engineers and successfully identify significant opportunities for our business based on those submissions. 

We believe the volume of new part designs we process and the size and diversity of our customer base give us valuable 
insight into the needs of our prospective customers. We utilize this industry knowledge to determine where we should focus 
our development resources. If the number of new part designs we process or the size and diversity of our customer base 
decrease,  our  ability  to  successfully  identify  significant  opportunities  for  our  business  and  meet  the  needs  of  product 
developers and engineers could be negatively impacted. In addition, even if we do continue to process a large number of new 
part designs and work with a significant and diverse customer base, there are no guarantees that any industry knowledge we 
extract from those interactions will be successfully utilized to help us identify significant business opportunities or better 
understand the needs of product developers and engineers. 

The loss of one or more key members of our management team or personnel, or our failure to attract, integrate and retain 
additional personnel in the future, could harm our business and negatively affect our ability to successfully grow our 
business. 

We are highly dependent upon the continued service and performance of the key members of our management team 
and other personnel. The loss of any of these individuals, each of whom is “at will” and may terminate his or her employment 
relationship  with  us  at  any  time,  could  disrupt  our  operations  and  significantly  delay  or  prevent  the  achievement  of  our 
business objectives. We believe that our future success will also depend in part on our continued ability to identify, hire, train 
and motivate qualified personnel. A possible shortage of qualified individuals in the regions where we operate might require 
us  to pay  increased  compensation  to  attract  and retain key  employees,  thereby  increasing our  costs. In  addition, we  face 
intense competition for qualified individuals from numerous companies, many of whom have substantially greater financial 
and other resources and name recognition than us. We may be unable to attract and retain suitably qualified individuals who 
are capable of meeting our growing operational, managerial and other requirements, or we may be required to pay increased 
compensation in order to do so. Our failure to attract, hire, integrate and retain qualified personnel could impair our ability 
to achieve our business objectives. 

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If we fail to grow our business as anticipated, our net sales, gross margin and operating margin will be adversely affected. 

We  are  attempting  to  grow  our  business  substantially.  To  this  end,  we  have  made  and  expect  to  continue  to  make 
significant  investments  in  our  business,  including  investments  in  our  infrastructure,  technology,  and  marketing  and  sales 
efforts. These investments include dedicated facilities expansion and increased staffing, both domestic and international. If 
our business does not generate the level of revenue required to support our investment, our net sales and profitability will be 
adversely affected. 

If  we  are  unable  to  manage  our  growth  and  expand  our  operations  successfully,  our  reputation  and  brand  may  be 
damaged, and our business and results of operations may be harmed. 

Over  the  past  several  years,  we  have  experienced  rapid  growth.  For  example,  we  have  grown  from  511  full-time 
employees as of January 1, 2012 to 1,549 full-time employees as of December 31, 2015. We have expanded internationally, 
including  establishing  manufacturing  operations  in  Europe  in 2005  and  through  the  acquisition of Alphaform  in October 
2015, as well as Japan in late 2009. In 2014, we expanded our product lines with 3D printing through our acquisition of 
FineLine. We expect this growth to continue and the number of countries and facilities from which we operate to increase in 
the future. Our ability to effectively manage our anticipated growth and expansion of our operations will require us to do, 
among other things, the following: 

• 

• 

• 

• 

enhance our operational, financial and management controls and infrastructure, human resource policies, and reporting 
systems and procedures, in particular as we continue to operate as a global organization; 

effectively  scale  our  operations,  including  accurately  predicting  the  need  for  floor  space,  equipment,  and
additional staffing; 

successfully identify, recruit, hire, train, maintain, motivate and integrate additional employees; and 

expand our international resources. 

These  enhancements  and  improvements  will  require  significant  capital  expenditures  and  allocation  of  valuable 
management and employee resources. Furthermore, our growth, combined with the geographical dispersion of our operations, 
has  placed,  and  will  continue  to  place,  a  strain  on  our  operational,  financial  and  management  infrastructure.  Our  future 
financial performance and our ability to execute on our business plan will depend, in part, on our ability to effectively manage 
any future growth and expansion. There are no guarantees we will be able to do so in an efficient or timely manner, or at all. 
Our  failure  to effectively  manage growth  and  expansion could  have  a material  adverse  effect  on our business,  results  of 
operations,  financial  condition,  prospects,  and  reputation  and  brand,  including  impairing  our  ability  to  perform  to  our 
customers’ expectations. 

We may not timely and effectively scale and adapt our existing technology, processes and infrastructure to meet the needs 
of our business. 

A key element to our continued growth is the ability to quickly and efficiently quote an increasing number of product 
developer and engineer submissions across geographic regions and to manufacture the related parts. This will require us to 
timely and effectively scale and adapt our existing technology, processes and infrastructure to meet the needs of our business. 
With respect to our websites and quoting technology, it may become increasingly difficult to maintain and improve their 
performance,  especially  during  periods  of  heavy  usage  and  as  our  solutions  become  more  complex  and  our  user  traffic 
increases across geographic regions. Similarly, our manufacturing automation technology may not enable us to process the 
large numbers of unique designs and efficiently manufacture the related parts in a timely fashion to meet the needs of product 
developers and engineers as our business continues to grow. Any failure in our ability to timely and effectively scale and 
adapt our existing technology, processes and infrastructure could negatively impact our ability to retain existing customers 
and attract new customers, damage our reputation and brand, result in lost revenue, and otherwise substantially harm our 
business and results of operations. 

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Numerous factors may cause us not to maintain the revenue growth that we have historically experienced. 

Although our revenue has grown from $98.9 million for the year ended December 31, 2011 to $264.1 million for the 
year ended December 31, 2015, we may not be able to maintain our historical rate of revenue growth. We believe that our 
continued revenue growth will depend on many factors, a number of which are out of our control, including among others, 
our ability to: 

• 

retain and further penetrate existing customer companies, as well as attract new customer companies; 

•  consistently execute on custom part orders in a manner that satisfies product developers’ and engineers’ needs and 

provides them with a superior experience; 

•  develop new technologies or manufacturing processes and broaden the range of parts we offer; 

• 

successfully execute on our international strategy and expand into new geographic markets; 

•  capitalize  on  product  developer  and  engineer  expectations  for  access  to  comprehensive,  user-friendly  e-commerce 

capabilities 24 hours per day, 7 days per week; 

• 

• 

• 

increase the strength and awareness of our brand across geographic regions; 

respond to changes in product developer and engineer needs, technology and our industry; and 

react to challenges from existing and new competitors. 

We cannot assure you that we will be successful in addressing the factors above and continuing to grow our business 

and revenue. 

Our operating results and financial condition may fluctuate on a quarterly and annual basis. 

Our operating results and financial condition may fluctuate from quarter to quarter and year to year, and are likely to 
continue to vary due to a number of factors, some of which are outside of our control. In addition, our actual or projected 
operating results may fail to match our past performance. These events could in turn cause the market price of our common 
stock to fluctuate. If our operating results do not meet the expectations of securities analysts or investors, who may derive 
their expectations by extrapolating data from recent historical operating results, the market price of our common stock will 
likely decline. 

Our operating results and financial condition may fluctuate due to a number of factors, including those listed below and 

those identified throughout this “Risk Factors” section: 

• 

• 

the development of new competitive systems or processes by others; 

the entry of new competitors into our market, whether by established companies or by new companies; 

•  changes in the size and complexity of our organization, including our international operations; 

• 

• 

levels of sales of our products and product lines to new and existing customers; 

the geographic distribution of our sales; 

•  changes in product developer and engineer preferences or needs; 

•  changes in the amount that we invest to develop, acquire or license new technologies and processes, which we anticipate

will generally increase and may fluctuate in the future; 

•  delays between our expenditures to develop, acquire or license new technologies and processes, and the generation of

sales related thereto; 

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•  our ability to timely and effectively scale our business during periods of sequential quarterly or annual growth; 

• 

limitations or delays in our ability to reduce our expenses during periods of declining sequential quarterly or annual
revenue; 

•  changes in our pricing policies or those of our competitors, including our responses to price competition; 

•  changes in the amount we spend in our marketing and other efforts; 

•  unexpected increases in expenses as compared to our related accounting accruals or operating plan; 

• 

the volatile global economy; 

•  general economic and industry conditions that affect customer demand and product development trends; 

• 

interruptions to or other problems with our website and interactive user interface, information technology systems, 
manufacturing processes or other operations; 

•  changes in accounting rules and tax and other laws; and 

•  plant shutdowns due to a health pandemic or weather conditions. 

Due to all of the foregoing factors and the other risks discussed in this “Risk Factors” section, you should not rely on 

quarter-to-quarter or year-to-year comparisons of our operating results as an indicator of future performance. 

Interruptions  to  or  other  problems  with  our  website  and  interactive  user  interface,  information  technology  systems, 
manufacturing processes or other operations could damage our reputation and brand and substantially harm our business 
and results of operations. 

The  satisfactory  performance,  reliability,  consistency,  security  and  availability  of  our  websites  and  interactive  user 
interface, information technology systems, manufacturing processes and other operations are critical to our reputation and 
brand, and to our ability to effectively service product developers and engineers. Any interruptions or other problems that 
cause any of our websites, interactive user interface or information technology systems to malfunction or be unavailable, or 
negatively  impact  our  manufacturing  processes  or  other  operations,  may  damage  our  reputation  and  brand,  result  in  lost 
revenue, cause us to incur significant costs seeking to remedy the problem and otherwise substantially harm our business and 
results of operations. 

A number of factors or events could cause such interruptions or problems, including among others: human and software 
errors,  design  faults,  challenges  associated  with  upgrades,  changes  or  new  facets  of  our  business,  power  loss, 
telecommunication failures, fire, flood, extreme weather, political instability, acts of terrorism, war, break-ins and security 
breaches, contract disputes, labor strikes and other workforce-related issues, capacity constraints due to an unusually large 
number of product developers and engineers accessing our websites or ordering parts at the same time, and other similar 
events.  These  risks  are  augmented  by  the  fact  that  our  customers  come  to  us  largely  for  our  quick-turn  manufacturing 
capabilities  and  that  accessibility  and  turnaround  speed  are  often  of  critical  importance  to  these  product  developers  and 
engineers. We are dependent upon our facilities through which we satisfy all of our production demands and in which we 
house all of the computer hardware necessary to operate our websites and systems as well as managerial, customer service, 
sales, marketing and other similar functions, and we have not identified alternatives to these facilities or established fully 
redundant  systems  in  multiple  locations.  However,  we  have  back-up  computing  systems  for  each  of  our  United  States, 
European  and  Japanese  operations.  In  addition,  we  are  dependent  in  part  on  third  parties  for  the  implementation  and 
maintenance of certain aspects of our communications and production systems, and therefore preventing, identifying and 
rectifying problems with these aspects of our systems is to a large extent outside of our control. 

Moreover, the business interruption insurance that we carry may not be sufficient to compensate us for the potentially 
significant losses, including the potential harm to the future growth of our business that may result from interruptions in our 
product lines as a result of system failures. 

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We depend on the continued growth of product developers’ and engineers’ e-commerce expectations when working with 
their custom parts manufacturers and their migration from 2D to 3D CAD software. 

The business of selling custom parts over the Internet via an interactive web-based and automated user interface and 
quoting system is not widespread in our industry. Moreover, many product developers and engineers still utilize 2D CAD 
software.  Concerns  about  privacy  and  technological  and  other  problems  may  discourage  some  product  developers  and 
engineers  from  adopting  the  Internet  as  the  medium  for  procuring  their  custom  parts  or  adopting  3D  CAD  software, 
particularly in countries where e-commerce and 3D CAD software are not as prevalent as they are in our current markets or 
with product developers and engineers in industries not well suited to utilize our product lines, such as architecture. In order 
to expand our customer base, we must appeal to and procure customers who historically have used more traditional means of 
commerce and/or 2D CAD drawings to purchase their customer parts. If product developers and engineers are not sufficiently 
attracted to the value proposition of or satisfied with our web-based interface and quotation system, or product developers 
and engineers do not continue to migrate to 3D CAD software as we currently anticipate, our business could be adversely 
impacted. 

Our business depends on the development and maintenance of the Internet infrastructure. 

The success of our product lines will depend largely on the development and maintenance of the Internet infrastructure. 
This includes maintenance of a reliable network backbone with the necessary speed, data capacity, and security, as well as 
timely  development  of  complementary  products,  for  providing  reliable  Internet  access  and  services.  The  Internet  has 
experienced, and is likely to continue to experience, significant growth in the numbers of users and amount of traffic. The 
Internet  infrastructure  may  be  unable  to  support  such  demands.  In  addition,  increasing  numbers  of  users,  increasing 
bandwidth  requirements,  or  problems  caused  by  “viruses,”  “worms,”  malware  and  similar  programs  may  harm  the 
performance of the Internet. The Internet has experienced a variety of outages and other delays as a result of damage to 
portions of its infrastructure, and it could face outages and delays in the future. These outages and delays could reduce the 
level of Internet usage generally as well as the level of usage of our product lines, which could adversely impact our business. 

If  the  security  of our  customers’  confidential  information  stored  in our  systems  is breached or  otherwise  subjected  to 
unauthorized access, our reputation or brand may be harmed, and we may be exposed to liability. 

Our system stores, processes and transmits our customers’ confidential information, including the intellectual property 
in  their  part  designs,  credit  card  information  and  other  sensitive  data.  We  rely  on  encryption,  authentication  and  other 
technologies  licensed  from  third  parties,  as  well  as  administrative  and  physical  safeguards,  to  secure  such  confidential 
information. Any compromise of our information security could damage our reputation and brand and expose us to a risk of 
loss,  costly  litigation  and  liability  that  would  substantially  harm  our  business  and  operating  results.  We  may  not  have 
adequately assessed the internal and external risks posed to the security of our company’s systems and information and may 
not have  implemented  adequate  preventative  safeguards or  take  adequate  reactionary  measures  in  the event of  a  security 
incident. In addition, most states have enacted laws requiring companies to notify individuals and often state authorities of 
data security breaches involving their personal data. These mandatory disclosures regarding a security breach often lead to 
widespread  negative  publicity,  which  may  cause  our  existing  and  prospective  customers  to  lose  confidence  in  the 
effectiveness of our data security measures. Any security breach, whether successful or not, would harm our reputation and 
brand and could cause the loss of customers. 

Global economic conditions may harm our ability to do business, increase our costs and negatively affect our stock price. 

The  prospects  for  economic  growth  in  the  United  States  and  other  countries  remain  uncertain  and  could  worsen. 
Economic  concerns  and  other  issues  such  as  reduced  access to  capital  for  businesses  may  cause  product  developers  and 
engineers  to  further  delay  or  reduce  the  product  development  projects  that  our  business  supports.  Given  the  continued 
uncertainty  concerning  the  global  economy,  we  face  risks  that  may  arise  from  financial  difficulties  experienced  by  our 
suppliers, product developers and engineers and other related risks to our business. 

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We operate a global business that exposes us to additional risks. 

We  have  established  our  operations  in  the  United  States,  Europe  and  Japan  and  are  seeking  to  further  expand  our 
international operations. As of December 31, 2015, we had sold products into approximately 60 countries. In addition to 
English, our website is available in British English, French, German, Italian, Japanese and Spanish. Our international revenue 
accounted for approximately 27%, 26% and 27% of our total revenue in the years ended December 31, 2015, 2014 and 2013, 
respectively. The future growth and profitability of our international business is subject to a variety of risks and uncertainties. 
Many of the following factors have adversely affected our international operations and sales to customers located outside of 
the United States and may again in the future: 

•  difficulties in staffing and managing foreign operations, particularly in new geographic locations; 

•  challenges in providing solutions across a significant distance, in different languages and among different cultures; 

• 

rapid changes in government, economic and political policies and conditions, political or civil unrest or instability, 
terrorism or epidemics, and other similar outbreaks or events; 

• 

fluctuations in foreign currency exchange rates; 

•  differences in product developer and engineer preferences and means of procuring parts; 

•  compliance  with  and  changes  in  foreign  laws  and  regulations,  as  well  as  U.S.  laws  affecting  the  activities  of  U.S.
companies abroad, including those associated with export controls, tariffs and embargoes, other trade restrictions and
antitrust and data privacy concerns; 

•  different, complex and changing laws governing intellectual property rights, sometimes affording companies lesser

protection in certain areas; 

•  differing levels of use of the Internet or 3D CAD software; 

• 

seasonal reductions in business activity in certain parts of the world, particularly during the summer months in Europe;

•  higher costs of doing business internationally; 

• 

interruptions resulting from any events affecting raw material supply or manufacturing capabilities abroad; 

•  protectionist laws and business practices that favor local producers and service providers; 

• 

taxation; 

•  energy costs; 

• 

restrictions imposed by local labor practices and laws on our business and operations; 

•  workforce uncertainty in countries where labor unrest is more common than in the United States; 

• 

• 

transportation delays; and 

increased payment risk and higher levels of payment fraud. 

Our business depends on product developers’ and engineers’ demand for our product lines, the general economic health 
of current and prospective customers, and companies’ desire or ability to make investments in new products. A deterioration 
of  global,  regional  or  local  political,  economic  or  social  conditions  could  affect  potential  customers  in  ways  that  reduce 
demand  for  our  product  lines,  disrupt  our  manufacturing  and  sales  plans  and  efforts  or  otherwise  negatively  impact  our 
business. Acts of terrorism, wars, public health issues and increased energy costs could disrupt commerce in ways that could 
impair our ability to get products to our customers and increase our manufacturing and delivery costs. We have not undertaken 
hedging transactions to cover our foreign currency exposure, and changes in foreign currency exchange rates may negatively 
impact reported revenue and expenses. In addition, our sales are often made on unsecured credit terms, and a deterioration of 
political, economic or social conditions in a given country or region could reduce or eliminate our ability to collect accounts 

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receivable  in  that  country  or  region.  In  any  of  these  events,  our  results  of  operations  could  be  materially  and  adversely 
affected. 

If  a  natural  or  man-made  disaster  strikes  any  of  our  manufacturing  facilities,  we  will  be  unable  to  manufacture  our 
products for a substantial amount of time and our sales will decline. 

We manufacture all of our products in 11 manufacturing facilities, two of which are located in each of Maple Plain, 
Minnesota and Raleigh, North Carolina, and one of which is located in each of Rosemount, Minnesota; Plymouth, Minnesota; 
Telford, United Kingdom; Feldkirchen, Germany; Eschenlohe, Germany; Rusko, Finland and Yamato-Shi, Kanagawa, Japan. 
These facilities and the manufacturing equipment we use would be costly to replace and could require substantial lead time 
to  repair  or  replace.  Our  facilities  may  be  harmed  by  natural  or  man-made  disasters,  including,  without  limitation, 
earthquakes, floods, tornadoes, fires, hurricanes, tsunamis and nuclear disasters.  

In the event any of our facilities are affected by a disaster, we may: 

•  be unable to meet the shipping deadlines of our customers; 

• 

experience  disruptions  in  our  ability  to  process  submissions  and  generate  quotations,  manufacture  and  ship  parts,
provide marketing and sales support and customer service, and otherwise operate our business, any of which could
negatively impact our business; 

•  be forced to rely on third-party manufacturers; 

•  need to expend significant capital and other resources to address any damage caused by the disaster; and 

• 

lose customers and be unable to regain those customers. 

Although we possess  insurance for  damage  to  our property  and  the disruption of our business  from  casualties,  this 
insurance may not be sufficient to cover all of our potential losses and may not continue to be available to us on acceptable 
terms, or at all. 

If our present single or limited source suppliers become unavailable or inadequate, our customer relationships, results of 
operations and financial condition may be adversely affected. 

We acquire substantially all of the manufacturing equipment and certain of our materials that are critical to the ongoing 
operation and future growth of our business from just a few third parties. We do not have long-term supply contracts with 
any  of  our  suppliers  and  operate  on  a  purchase-order  basis.  While  most  manufacturing  equipment  and  materials  for  our 
products are available from multiple suppliers, certain of those items are only available from single or limited sources. Should 
any  of  our  present  single  or  limited  source  suppliers  for  manufacturing  equipment  or  materials  become  unavailable  or 
inadequate, or impose terms unacceptable to us such as increased pricing terms, we could be required to spend a significant 
amount  of  time  and  expense  to develop  alternate sources  of  supply,  and we  may  not be  successful  in doing  so on terms 
acceptable to us, or at all. Natural disasters, such as hurricanes, may affect our supply of materials, particularly resins, from 
time to time, and we may purchase larger amounts of certain materials in anticipation of future shortages or increases in 
pricing. In addition, if we were unable to find a suitable supplier for a particular type of manufacturing equipment or material, 
we could be required to modify our existing business processes and offerings to accommodate the situation. As a result, the 
loss  of  a  single  or  limited  source  supplier  could  adversely  affect  our  relationship  with  our  customers  and  our  results  of 
operations and financial condition. 

We may not be able to 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,  licenses,  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  will  not  be  challenged,  invalidated  or 
circumvented. As such, any rights granted under these patents may not provide us with meaningful protection. We may not 
be able to obtain foreign patents corresponding to our United States patents. Even if foreign patents are granted, effective 
enforcement in foreign countries may not be available. If our patents and other intellectual property do not adequately protect 
our  technology,  our  competitors  may  be  able  to offer  product  lines  similar  to  ours. Our  competitors may  also  be  able  to 
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develop similar technology independently or design around our patents. Any of the foregoing events would lead to increased 
competition and lower revenue or gross margin, which would adversely affect our net income. 

We may be subject to 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 fields of CNC machining, injection molding or part production for purposes of 
developing  competing  products  or  for  the  sole  purpose  of  asserting  claims  against  us.  Any  claims  that  our  products  or 
processes infringe 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 processes, our market share, 
sales and profitability could be adversely impacted. 

Our failure to expand our intellectual property portfolio could adversely affect the growth of our business and results of 
operations. 

Expansion of our intellectual property portfolio is one of the available methods of growing our revenue and our profits. 
This  involves  a  complex  and  costly  set  of  activities  with  uncertain  outcomes.  Our  ability  to  obtain  patents  and  other 
intellectual  property  can be  adversely  affected by  insufficient  inventiveness  of our  employees,  by  changes  in  intellectual 
property  laws,  treaties,  and  regulations,  and  by  judicial  and  administrative  interpretations  of  those  laws  treaties  and 
regulations. Our ability to expand our intellectual property portfolio could also be adversely affected by the lack of valuable 
intellectual property for sale or license at affordable prices. There is no assurance that we will be able to obtain valuable 
intellectual property in the jurisdictions where we and our competitors operate or that we will be able to use or license that 
intellectual property. 

We may be subject to product liability claims, which could result in material expense, diversion of management time and 
attention and damage to our business and reputation and brand. 

The prototype parts we manufacture and the parts we manufacture in low volumes may contain undetected defects or 
errors that are not discovered until after the products have been installed and used by customers. This could result in claims 
from customers or others, damage to our business and reputation and brand, or significant costs to correct the defect or error. 

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. 

The sale and support of our products entails the risk of product liability claims. Any product liability claim brought 
against us, regardless of its merit, could result in material expense, diversion of management time and attention, damage to 
our business and reputation and brand, and cause us to fail to retain existing customers or to fail to attract new customers. 

Government regulation of the Internet and e-commerce is evolving, and unfavorable changes or failure by us to comply 
with these regulations could substantially harm our business and results of operations. 

We  are  subject  to  general  business  regulations  and  laws  as  well  as  regulations  and  laws  specifically  governing  the 
Internet and e-commerce. Existing and future laws and regulations may impede the growth of the Internet or other online 
services. These regulations and laws may cover taxation, restrictions on imports and exports, customs, tariffs, user privacy, 
data  protection,  pricing,  content,  copyrights,  distribution,  electronic  contracts  and  other  communications,  consumer 
protection, the provision of online payment services, broadband residential Internet access and the characteristics and quality 
of products and product lines. It is not clear how existing laws governing issues such as property use and ownership, sales 
and other taxes, fraud, libel and personal privacy apply to the Internet and e-commerce, especially where these laws were 
adopted prior to the advent of the Internet and do not contemplate or address the unique issues raised by the Internet or e-
commerce. Those laws that do reference the Internet are being interpreted by the courts and their applicability and reach are 
therefore uncertain. The costs of compliance with these regulations may increase in the future as a result of changes in the 
regulations or the interpretation of them. Further, any failures on our part to comply with these regulations may subject us to 
significant  liabilities.  Those  current  and  future  laws  and  regulations  or  unfavorable  resolution  of  these  issues  may 
substantially harm our business and results of operations. 

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Changes in, or interpretation of, tax rules and regulations may impact our effective tax rate and future profitability. 

We are a multinational company based in the United States and subject to tax in multiple tax jurisdictions, both domestic 
and abroad. Our future effective tax rates could be adversely affected by changes in statutory tax rates or interpretation of tax 
rules and regulations in jurisdictions in which we do business, changes in the amount of revenue or earnings in the countries 
with varying statutory tax rates, or by changes in the valuation of deferred tax assets and liabilities. 

In addition, we are subject to audits and examinations of previously filed income tax returns by the Internal Revenue 
Service, or IRS, and other domestic and foreign tax authorities. We regularly assess the potential impact of such examinations 
to determine the adequacy of our provision for income taxes and have reserved for potential adjustments that may result from 
the  current  examinations.  We  believe  such  estimates  to  be  reasonable;  however,  there  is  no  assurance  that  the  final 
determination of any examination will not have an adverse effect on our operating results and financial position. 

We may require additional capital to support business growth, and this capital might not be available on acceptable terms, 
if at all. 

We intend to continue to make investments to support our business growth and may require additional funds to respond 
to business challenges, including the need to complement our growth strategy, increase market share in our current markets 
or expand into other markets, or broaden our technology, intellectual property or product line capabilities. Accordingly, we 
may  need  to  engage  in  equity  or  debt  financings  to  secure  additional  funds.  If  we  raise  additional  funds  through  future 
issuances of equity or convertible debt securities, our existing shareholders could suffer significant dilution, and any new 
equity securities we issue could have rights, preferences and privileges superior to those of holders of our common stock. 
Any debt financing we secure in the future could involve restrictive covenants relating to our capital raising activities and 
other financial and operational matters, which may make it more difficult for us to obtain additional capital and to pursue 
business opportunities, including potential acquisitions. We may not be able to obtain additional financing on terms favorable 
to us, if at all. If we are unable to obtain adequate financing or financing on terms satisfactory to us when we require it, our 
ability to continue to support our business growth and to respond to business challenges could be significantly impaired, and 
our business may be harmed. 

Any acquisition, strategic relationship, joint venture or investment could disrupt our business and harm our operating 
results and financial condition. 

Our business and our customer base have been built primarily through organic growth. However, from time to time, we 
may selectively pursue acquisitions, strategic relationships, joint ventures or investments that we believe may allow us to 
complement our growth strategy, increase market share in our current markets or expand into other markets, or broaden our 
technology, intellectual property or product line capabilities. For example, in April 2014, we acquired FineLine to enable us 
to offer our customers 3D printing manufacturing processes and in October 2015, we acquired Alphaform to enable us to 
expand our 3D printing capabilities in Europe. We cannot forecast the number, timing or size of any future acquisitions or 
other similar strategic transactions, or the effect that any such transactions might have on our operating or financial results. 
We have limited experience engaging in these types of transactions. Such transactions may be complex, time consuming and 
expensive, and may present numerous challenges and risks including: 

•  an acquired company, asset or technology not furthering our business strategy as anticipated; 

•  difficulties entering and competing in new product or geographic markets and increased competition, including price 

competition; 

• 

integration challenges; 

•  challenges in working with strategic partners and resolving any related disagreements or disputes; 

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•  high valuation for a company, asset or technology, or changes in the economic or market conditions or assumptions 

underlying our decision to make an acquisition; 

• 

significant problems or liabilities, including increased intellectual property and employment related litigation exposure,
associated with acquired businesses, assets or technologies; 

•  acquisition of a significant amount of goodwill, which could result in future impairment charges that would reduce our

earnings; and 

• 

requirements  to  record  substantial  charges  and  amortization  expense  related  to  certain  purchased  intangible  assets, 
deferred stock compensation and other items, as well as other charges or expenses. 

Any one of these challenges or risks could impair our ability to realize any benefit from our acquisitions, strategic 
relationships, joint ventures or investments after we have expended resources on them, as well as divert our management’s 
attention. Any failure to successfully address these challenges or risks could disrupt our business and harm our operating 
results and financial condition. Moreover, any such transaction may not be viewed favorably by investors or stakeholders. 

In  addition,  from  time  to  time  we  may  enter  into  negotiations  for  acquisitions,  relationships,  joint  ventures  or 
investments that are not ultimately consummated. These negotiations could result in significant diversion of management 
time, as well as substantial out-of-pocket costs. 

We depend in part on licenses of technologies from third parties in order to deliver our solutions, and, as a result, our 
business is dependent in part on the availability of such licenses on commercially reasonable terms. 

We currently, and will continue to, license certain technologies from third parties. While these licenses are not material 
to our financial results, their function in our business is integral to our operations. We cannot be certain that these third-party 
content licenses will be available to us on commercially reasonable terms or that we will be able to successfully integrate the 
technology into our solutions. These third-party licenses may expose us to increased risk, including risks associated with the 
assimilation of new technology sufficient to offset associated acquisition and maintenance costs. The inability to obtain any 
of these licenses could result in delays in solution development until equivalent technology can be identified and integrated. 
Any such delays in services could cause our business, operating results and financial condition to suffer. 

Our business involves the use of hazardous materials, and we and our suppliers must comply with environmental laws 
and regulations, which can be expensive and restrict how we do business. 

Our business involves the controlled storage, use and disposal of hazardous materials. We and our suppliers are subject 
to  federal,  state  and  local  as  well  as  foreign  laws  and  regulations  governing  the  use,  manufacture,  storage,  handling  and 
disposal of these hazardous materials. Although we believe that the safety procedures utilized by us and our suppliers for 
handling and disposing of these materials comply with the standards prescribed by these laws and regulations, we cannot 
eliminate the risk of accidental contamination or injury from these materials. In the event of an accident, state, federal or 
foreign authorities may curtail the use of these materials and interrupt our business operations. We do not currently maintain 
hazardous  materials  insurance  coverage.  If  we  are  subject  to  any  liability  as  a  result  of  activities  involving  hazardous 
materials, our business and financial condition may be adversely affected and our reputation and brand may be harmed. 

If we are unable to meet regulatory quality standards applicable to our manufacturing and quality processes for the parts 
we manufacture, our business, financial condition or operating results could be harmed. 

As a manufacturer of CNC-machined and injection-molded custom parts, we are required to meet certain regulatory 
standards, including International Organization for Standardization, or ISO, 9001:2008 for our manufacturing facilities in 
Minnesota. In North Carolina, we are required to meet ISO 9001:2008 standards for our plastics manufacturing and AS9100 
standards for our metals manufacturing. We are also able to meet regulatory standards ISO 9001:2008 at our manufacturing 
facilities in Feldkirchen, Germany, Eschenlohe, Germany and Rusko, Finland. We also meet regulatory standard ISO 13485 
at our manufacturing facility in Eschenlohe, Germany. If any regulatory inspection reveals that we are not in compliance with 
applicable standards, regulators may take action against us, including issuing a warning letter, imposing fines on us, requiring 
a recall of the parts we manufactured or closing our manufacturing facilities. If any of these actions were to occur, it could 
harm our reputation as well as our business, financial condition and operating results. In addition, we may need to obtain 
additional  certifications  in  the  future  and  there  are  no  guarantees  we  would  be  able  to  do  so  on  a  timely  basis,  if  at  all. 
Moreover, obtaining and maintaining required regulatory certifications can be costly and divert management’s attention. 

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We are subject to payment-related risks. 

We accept payments using a variety of methods, including credit card, customer invoicing, physical bank check and 
payment upon delivery. As we offer new payment options to our customers, we may be subject to additional regulations, 
compliance requirements and fraud risk. For certain payment methods, including credit and debit cards, we pay interchange 
and other fees, which may increase over time and raise our operating costs and lower profitability. We rely on third parties 
to provide payment processing services, including the processing of credit cards, debit cards or electronic checks, and it could 
disrupt our business if these companies become unwilling or unable to provide these services to us. We are also subject to 
payment card association operating rules, certification requirements and rules governing electronic funds transfers, which 
could change or be reinterpreted to make it difficult or impossible for us to comply. If we fail to comply with these rules or 
requirements, we  may  be  subject  to  fines and  higher  transaction  fees  and  lose our  ability  to  accept credit  and debit  card 
payments from our customers, process electronic funds transfers, or facilitate other types of online payments, and our business 
and operating results could be adversely affected. 

Risks Relating to Ownership of Our Common Stock 

Our stock price has been and may continue to be volatile. 

In the year ended December 31, 2015, our common stock traded as high as $79.95 and as low as $57.30. The market 
for our common stock may become less active, liquid or orderly, which could depress the trading price of our common stock. 
Some of the factors, many of which are outside of our control, that may cause the market price of our common stock to 
fluctuate include: 

• 

fluctuations in our financial condition and operating results; 

•  our ability to retain and attract customers and increase net sales; 

•  pricing pressures due to competition or otherwise and changes in gross margins; 

•  changes in general economic and market conditions, economic uncertainty and changes in product development activity

levels; 

•  announcements by us or our competitors of technological innovations or new product or product lines offerings or

significant acquisitions; 

• 

timing, effectiveness, and costs of expansion and upgrades of our offerings, systems and infrastructure; 

•  changes in key personnel; 

• 

• 

• 

• 

success in entry into new markets and expansion efforts; 

the public’s response to press releases or other public announcements by us or third parties, including our filings with
the Securities and Exchange Commission, or SEC, and announcements relating to litigation; 

the projections we may provide to the public, any changes in these projections or our failure to meet these projections;

the issuance of new or updated research or reports by any securities or industry analysts who follow our common stock,
changes in analysts’ financial estimates or ratings, and failure of securities analysts to initiate or maintain coverage of
our common stock; 

•  changes in the market valuations of similar companies; 

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• 

significant lawsuits, including patent or shareholder litigation; 

•  changes in laws or regulations applicable to us; 

•  changes in accounting principles; 

• 

• 

• 

• 

the sustainability of an active trading market for our common stock; 

future sales of our common stock by us or our shareholders, including sales by our officers, directors and significant
shareholders; 

share price and volume fluctuations attributable to inconsistent trading levels of our shares; 

the expiration of contractual lock-up agreements; and 

•  other events or factors, including those resulting from war, acts of terrorism, natural disasters or responses to these

events. 

In addition, the stock markets have experienced extreme price and volume fluctuations that have affected and continue 
to affect the market prices of equity securities of many companies. In the past, shareholders have instituted securities class 
action litigation following periods of market volatility. If we were to become involved in securities litigation, we could incur 
substantial costs and our resources and the attention of management could be diverted from our business. 

If securities or industry analysts publish inaccurate or unfavorable research or reports about our business, our stock price 
and trading volume could decline. 

The  trading  market  for  our  common  stock  depends,  in  part,  on  the  research  and  reports  that  securities  or  industry 
analysts publish about us or our business. We do not have any control over these analysts. If one or more of the analysts who 
covers us downgrades our common stock, changes their opinion of our shares or publishes inaccurate or unfavorable research 
about our business, our stock price would likely decline. If one or more of these analysts ceases coverage of us or fails to 
publish reports on us regularly, demand for our common stock could decrease and we could lose visibility in the financial 
markets, which could cause our stock price and trading volume to decline. 

Our  failure  to  maintain  proper  and  effective  internal  controls  over  financial  reporting  and  otherwise  comply  with 
Section 404 of the Sarbanes-Oxley Act or prevent or detect misstatements in our financial statements in the future could 
harm our business and cause a decrease in our stock price. 

Ensuring that we have internal financial and accounting controls and procedures adequate to produce accurate financial 
statements on a timely basis is a costly and time-consuming effort that needs to be re-evaluated frequently. The Sarbanes-
Oxley Act requires, among other things, that we maintain effective internal control over financial reporting and disclosure 
controls and procedures. In particular, we are required to perform annual system and process evaluation and testing of our 
internal control over financial reporting to allow management and our independent registered public accounting firm to report 
on the effectiveness of our internal control over financial reporting, as required by Section 404 of the Sarbanes-Oxley Act. If 
we are not able to comply with the requirements of Section 404 in the future, or if we fail to prevent or detect misstatements 
in the financial statements we include in our reports filed with the SEC, our business could be harmed and the market price 
of our common stock could decline. 

Anti-takeover provisions in our charter documents and Minnesota law might discourage or delay acquisition attempts for 
us that you might consider favorable. 

Our Third Amended and Restated Articles of Incorporation, as amended, and Amended and Restated By-Laws contain 
provisions that may make the acquisition of our company more difficult without the approval of our board of directors. These 
provisions: 

•  permit  our  board  of  directors  to  issue  up  to  10,000,000  shares  of  preferred  stock,  with  any  rights,  preferences  and
privileges as our board may designate, including the right to approve an acquisition or other change in our control; 

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•  provide that the authorized number of directors may be changed by resolution of the board of directors; 

•  provide that all vacancies, including newly created directorships, may, except as otherwise required by law, be filled

by the affirmative vote of a majority of directors then in office, even if less than a quorum; 

•  provide that shareholders seeking to present proposals before a meeting of shareholders or to nominate candidates for 
election as directors at a meeting of shareholders must provide notice in writing in a timely manner, and also specify
requirements as to the form and content of a shareholder’s notice; and 

•  do not provide for cumulative voting rights. 

We are subject to the provisions of Section 302A.673 of the Minnesota Statutes, which regulates business combinations. 
Section 302A.673 generally prohibits any business combination by an issuing public corporation, or any of its subsidiaries, 
with an interested shareholder, which means any shareholder that purchases 10% or more of the corporation’s voting shares 
within four years following the date the person became an interested shareholder, unless the business combination is approved 
by a committee composed solely of one or more disinterested members of the corporation’s board of directors before the date 
the person became an interested shareholder. 

These anti-takeover provisions could discourage, delay or prevent a transaction involving a change in control of our 
company, even if doing so would benefit our shareholders. These provisions could also discourage proxy contests and make 
it more difficult for you and other shareholders to elect directors of your choosing and to cause us to take other corporate 
actions you desire. 

We do not expect to pay any cash dividends for the foreseeable future. 

We have never declared or paid any cash dividends on our common stock, and we do not anticipate that we will pay 
any such cash dividends for the foreseeable future. We anticipate that we will retain all of our future earnings for use in the 
business and for general corporate purposes. Any determination to pay dividends in the future will be at the discretion of our 
board  of  directors  and  will  depend  upon  results  of  operations,  financial  condition,  contractual  restrictions,  restrictions 
imposed by applicable law and other factors our board of directors deems relevant.  

Item 1B. Unresolved Staff Comments 

None. 

Item 2. Properties 

We believe that our facilities are well maintained and of sufficient capacity to support our current operations. We have 

facilities in the following regions: 

United States 

Our corporate headquarters are located in Maple Plain, Minnesota in a facility we own encompassing approximately 
95,000  square  feet  of  office  space.  We  also  own  a  nearby  facility  encompassing  approximately  35,000  square  feet  of 
manufacturing  space.  We  lease  an  additional  facility  on  a  property  adjacent  to  our  headquarters  that  encompasses 
approximately 40,000 square feet of manufacturing space. The lease for this facility expires in 2017, subject to our option to 
renew for up to two additional five-year terms. We own a facility in Rosemount, Minnesota that encompasses approximately 
130,000 square feet of manufacturing and office space. We also own a facility in Plymouth, Minnesota that encompasses 
approximately 170,000 square feet of manufacturing and office space.  

In April 2014, we purchased FineLine Prototyping, Inc. (FineLine) and assumed the leases of two facilities in Raleigh, 
North Carolina. The two facilities we lease are approximately 10,000 square feet each, with both leases expiring in 2018 
and one of the leases having the option to extend the lease for three successive periods of five years each. We also purchased 
a facility in Cary, North Carolina in 2015, that encompasses approximately 77,000 square feet of manufacturing and office 
space.  

26 

 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
   
 
 
Europe 

Our  European  operations  are  headquartered  in  Telford,  United  Kingdom  in  a  facility  we  own  encompassing 

approximately 126,000 square feet of office and manufacturing space.  

We also lease office space in Mosbach, Germany, Le Bourget du Lac, France and Novara, Italy, for sales, customer 
service and technical support staff. In October 2015, we purchased certain assets, including shares of select subsidiaries, of 
Alphaform  AG  (Alphaform),  headquarted  in  Feldkirchen  (Munich),  Germany.  As  a  result  of  the  acquisition,  we  lease 
manufacturing and office facilities encompassing approximately 85,000 square feet in Feldkirchen, Germany, approximately 
21,000 square feet in Eschenlohe, Germany and approximately 17,000 square feet in Rusko, Finland. 

Japan 

Our Japan operations are headquartered in Yamato-Shi, Kanagawa, Japan (southwest of Tokyo) in a leased facility 
encompassing approximately 30,000 square feet of office and manufacturing space. The lease expires in November 2021 and 
has a cancellation clause with six months’ prior notice without penalty. Our operations have grown in Japan and we have 
initiated the search for a facility to support our growth in the region. 

Item 3. Legal Proceedings 

From  time  to  time,  we  are  subject  to  various  legal  proceedings  and  claims  that  arise  in  the  ordinary  course  of  our 
business activities. Although the results of litigation and claims cannot be predicted with certainty, as of the date of this 
Annual Report on Form 10-K, we do not believe we are party to any litigation the outcome of which, if determined adversely 
to us, would individually or in the aggregate be reasonably expected to have a material adverse effect on our business. 

Item 4. Mine Safety Disclosures 

Not applicable. 

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PART II 

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

Our common stock has traded on the New York Stock Exchange (NYSE) under the symbol “PRLB” since February 24, 
2012. Prior to that date, there was no public market for our common stock. The following table sets forth, for the periods 
indicated, the high and low intraday sales prices for our common stock as reported on the NYSE: 

Fiscal 2015 

Fiscal 2014 

High 

Low 

High 

Low 

First Quarter ..................................................  $ 
Second Quarter ..............................................  $ 
Third Quarter ................................................  $ 
Fourth Quarter ...............................................  $ 

74.82    $ 
79.00    $ 
79.95    $ 
69.48    $ 

57.30     $ 
65.84     $ 
65.82     $ 
58.84     $ 

84.00    $ 
83.06    $ 
94.23    $ 
73.46    $ 

62.09   
58.06   
68.88   
54.97   

On February 17, 2016, the last reported sale price of our common stock on the NYSE was $63.56 per share. As of 
February 17, 2016, we had 11 holders of record of our common stock. The actual number of shareholders is greater than this 
number of record holders, and includes shareholders who are beneficial owners, but whose shares are held in street name by 
brokers and other nominees. 

We have never declared or paid any cash dividends on our capital stock. We currently intend to retain all available 
funds and any future earnings to support our operations and finance the growth and development of our business. We do not 
intend to pay cash dividends on our common stock for the foreseeable future. Any future determination related to our dividend 
policy will be made at the discretion of our board of directors and will depend on then-existing conditions, including our 
financial condition, operating results, contractual restrictions, capital requirements, business prospects and other factors our 
board of directors may deem relevant. 

Outstanding Equity Awards 

The following table summarizes, as of December 31, 2015, information about shares of our common stock that may be 

issued under equity compensation plans approved by shareholders and plans not approved by shareholders: 

Number of 
shares to 
be issued upon 
exercise of 
outstanding 
options, 
warrants and 
rights 

Weighted-
average 
exercise price 
of outstanding 
options, 
warrants and 
rights 

Number of 
shares 
remaining 
available 
for future 
issuance 
under equity 
compensation 
plans 
(excluding 
shares in 
first column) 

Plan Category 

Equity compensation plans approved by shareholders(1) ....................     
Equity compensation plans not approved by shareholders .................   

890,435  
None 

    $ 

31.41  
N/A 

       6,981,372(2) 

None 

(1) 
(2) 

Includes the 2000 Stock Option Plan, the 2012 Long-Term Incentive Plan and our Employee Stock Purchase Plan 
Includes  1,325,792  shares  remaining  available  for  issuance  as  of  December  31,  2015  under  our  Employee  Stock
Purchase Plan. 

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Performance Graph 

The following graph shows a comparison from February 24, 2012 (the date our common stock commenced trading on 
the NYSE) through December 31, 2015 of the cumulative total return for our common stock, the S&P 500 Index and the 
Russell 2000 Index. We have selected the Russell 2000 Index because the Russell 2000 Index measures the performance of 
the small market capitalization segment of U.S. equity instruments and we are a member company included in the Russell 
2000 Index. Such returns are based on historical results and are not intended to suggest future performance. Data for the S&P 
500 Index and the Russell 2000 Index assume reinvestment of dividends. 

Period Ending 
Index 
   02/23/12      06/30/12      12/31/12      06/30/13      12/31/13      06/30/14      12/31/14      06/30/15      12/31/15  
Proto Labs, Inc.      100.00       179.75       246.38       406.06       444.88       512.00       419.75       421.75       398.06 
99.90       104.60       117.81       135.56       143.77       151.01       151.31       149.91 
S&P 500 ...........     100.00      
96.29       102.43       117.88       140.33       143.86       145.28       151.22       136.98 
Russell 2000 .....     100.00      

Unregistered Sales of Equity Securities and Issuer Purchases of Equity Securities 

We did not sell any unregistered equity securities or purchase any of our securities during the year ended December 31, 

2015. 

Item 6. Selected Financial Data 

The following tables set forth selected consolidated financial data for the periods and at the dates indicated. The selected 
consolidated statements of comprehensive income data for the years ended December 31, 2015, 2014 and 2013 and selected 
consolidated balance  sheets data  as of December 31,  2015  and  2014  are  derived  from  our  audited  consolidated financial 
statements included in Item 8. “Financial Statements and Supplementary Data” of this Annual Report on Form 10-K. The 
selected consolidated statements of comprehensive income data for the years ended December 31, 2012 and 2011 and selected 
consolidated balance sheet data as of December 31, 2013, 2012 and 2011 are derived from our audited consolidated financial 
statements not included in this report. 

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The historical results presented below are not necessarily indicative of the results to be expected for any future period. 
You should read this selected consolidated financial data in conjunction with Item 7. “Management’s Discussion and Analysis 
of Financial Condition and Results of Operations,” and the consolidated financial statements and related notes appearing in 
Item 8. “Financial Statements and Supplementary Data” of this Annual Report on Form 10-K.  

(in thousands, except share and per share amounts) 

2015 

Year Ended December 31, 
2013 

2012 

2014 

Consolidated Statements of Comprehensive 

Income Data 

Revenue ................................................................   $
Cost of revenue ....................................................     
Gross profit ..........................................................     
Operating expenses: 

Marketing and sales ..........................................     
Research and development ...............................     
General and administrative ...............................     
Total operating expenses ...............................     
Income from operations .......................................     
Other income (expense), net .................................     
Income before income taxes .................................     
Provision for income taxes ...................................     
Net income ...........................................................     
Less: dividends on redeemable preferred stock ....     
Less: undistributed earnings allocated to 
preferred shareholders ..........................................     
Net income attributable to common 
shareholders(1) ......................................................   $

Net income per share(1) 

2011 

98,939   
39,324   
59,615   

15,752   
5,222   
11,772   
32,746   
26,869   
(114) 
26,755   
8,783   
17,972   
(4,179) 

264,106    $
109,703      
154,403      

209,583     $
81,182       
128,401       

163,112     $
61,410       
101,702       

125,991     $
49,853       
76,138       

39,188      
18,350      
29,716      
87,254      
67,149      
712      
67,861      
21,347      
46,514      
-      

29,144       
16,607       
22,122       
67,873       
60,528       
3       
60,531       
18,896       
41,635       
-      

22,386       
11,863       
16,154       
50,403       
51,299       
279       
51,578       
16,301       
35,277       
-      

18,098       
9,137       
13,957       
41,192       
34,946       
23       
34,969       
10,944       
24,025       
-      

-      

-      

-      

-      

(4,507) 

46,514    $

41,635     $

35,277     $

24,025     $

9,286   

Basic .................................................................   $
Diluted ..............................................................   $

1.79    $
1.77    $

1.62     $
1.60     $

1.40     $
1.36     $

1.03     $
0.98     $

0.75   
0.67   

Weighted average shares outstanding(1) 

Basic .................................................................     26,005,858      25,692,699      25,198,556      23,373,593      12,352,004  
Diluted ..............................................................     26,320,284      26,100,320      25,859,741      24,443,665      13,939,072  

Other Comprehensive Loss, net of tax 
Foreign currency translation adjustments .............   $
Comprehensive income ........................................   $

(2,283)   $
44,231    $

(1,838)   $
39,797     $

(163)   $
35,114     $

(190)   $
23,835     $

(280) 
17,692   

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Stock-based compensation expense included in the statements of comprehensive income data above is as follows: 

(in thousands) 

2015 

Year Ended December 31, 
2013 

2012 

2014 

2011 

Stock options and grants ......................................   $
Employee stock purchase plan .............................     
Total stock-based compensation expense .............   $

5,580    $ 
502      
6,082    $ 

4,386     $
423       
4,809     $

3,084     $
377       
3,461     $

2,539     $
500       
3,039     $

1,130   
-  
1,130   

Cost of revenue ....................................................   $
Operating expenses: 

Marketing and sales ..........................................     
Research and development ...............................     
General and administrative ...............................     
Total stock-based compensation expense .............   $

513    $ 

386     $

316     $

335     $

78   

1,074      
1,285      
3,210      
6,082    $ 

927       
1,048       
2,448       
4,809     $

610       
754       
1,781       
3,461     $

418       
486       
1,800       
3,039     $

215   
274   
563   
1,130   

(in thousands) 
Consolidated Balance Sheets Data 
Cash and cash equivalents ....................................   $
Working capital ....................................................     
Total assets ...........................................................     
Total liabilities .....................................................     
Redeemable convertible preferred stock and 

2015 

Year Ended December 31, 
2013 

2012 

2014 

2011 

47,653    $ 
111,740      
361,036      
33,391      

43,329     $
89,102       
287,031       
21,492       

43,039     $
96,132       
230,175       
18,532       

36,759     $
78,617       
172,722       
16,023       

8,135   
18,138   
62,326   
15,675   

redeemable common stock .................................     
Total shareholders' equity (deficit) .......................   $

-      

-      
327,645    $  265,539     $

-      
211,643     $

-      
156,699     $

66,894   
(20,243) 

(1)  See Note 3 of Notes to Consolidated Financial Statements for an explanation of the method used to calculate net income 
per basic and diluted share attributable to common shareholders and weighted average shares outstanding for the years
ended December 31, 2015, 2014 and 2013, respectively. 

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations 

The following discussion and analysis of our financial condition and results of operations should be read in conjunction 
with the consolidated financial statements and related notes included elsewhere in this Annual Report on Form 10-K. This 
discussion and analysis contains forward-looking statements that involve risks and uncertainties. Our actual results may 
differ materially from those anticipated in these forward- looking statements as a result of various factors, including those 
set forth under “Risk Factors” and elsewhere in this Annual Report on Form 10-K. 

Overview 

We are a leading online and technology-enabled manufacturer of quick-turn, on-demand 3D printed, CNC-machined 
and injection-molded custom parts for prototyping and short-run production. We provide “Real Parts, Really Fast” to product 
developers and engineers worldwide, who are under increasing pressure to bring their finished products to market faster than 
their  competition.  We  believe  custom  parts  manufacturing  has  historically  been  an  underserved  market  due  to  the 
inefficiencies  inherent  in  the  quotation,  equipment  set-up  and  non-recurring  engineering  processes  required  to  produce 
custom parts. Our proprietary technology eliminates most of the time-consuming and expensive skilled labor conventionally 
required to quote and manufacture parts in low volumes, and our customers conduct nearly all of their business with us over 
the Internet. We target our product lines to the millions of product developers and engineers who use 3D CAD software to 
design products across a diverse range of end-markets. Our primary manufacturing product lines currently include Injection 
Molding (Protomold), CNC Machining (Firstcut) and 3D Printing (Fineline). 

We  have  experienced  significant  growth  since  our  inception.  Since  we  first  introduced  our  Injection  Molding 
(Protomold) product line in 1999, we have steadily expanded the size and geometric complexity of the injection-molded parts 
we are able to manufacture, and we continue to extend the diversity of materials we are able to support. Similarly, since first 
introducing our CNC Machining (Firstcut) product line in 2007, we have expanded the range of part sizes, design geometries 
and materials we can support. In 2014, we acquired FineLine to expand the number of process types we offer to include 
stereolithography (SL), selective laser sintering (SLS) and direct metal laser sintering (DMLS). We also continually seek to 
enhance other aspects of our technology and manufacturing processes, including our interactive web-based and automated 
user interface and quoting system. We intend to continue to invest significantly to enhance our technology and manufacturing 
processes and expand the range of our existing capabilities with the aim of meeting the needs of a broader set of product 
developers and engineers. As a result of the factors described above, many of our customers tend to return to Proto Labs to 
meet their ongoing needs, with approximately 85%, 87% and 86% of our revenue in 2015, 2014 and 2013, respectively, 
derived from existing customers. 

We have established our operations in the United States, Europe and Japan, which we believe are three of the largest 
geographic markets where product developers and engineers are located. We entered the European market in 2005, launched 
operations  in  Japan  in  late  2009  and  further  expanded  into  Europe  through our  acquisition  of  Alphaform  in  2015. As of 
December  31,  2015,  we  had  sold  products  into  approximately  60  countries.  Our  revenue  outside  of  the  United  States 
accounted for approximately 27%, 26% and 27% of our consolidated revenue in the years ended December 31, 2015, 2014 
and 2013, respectively. We intend to continue to expand our international sales efforts and believe opportunities exist to serve 
the needs of product developers and engineers in select new geographic regions. 

We  have  grown  our  total  revenue  from  $98.9  million  in  2011  to  $264.1  million  in  2015.  During  this  period,  our 
operating  expenses  increased  from  $32.7  million  in  2011  to  $87.3  million  in  2015.  We  have  grown  our  income  from 
operations from $26.9 million in 2011 to $67.1 million in 2015. Our recent growth in revenue and income from operations 
has  been  accompanied  by  increased  cost  of  revenues  and  operating  expenses.  We  expect  to  increasingly  invest  in  our 
operations to support anticipated future growth as discussed more fully below. 

In addition, we believe that a number of trends affecting our industry have affected our results of operations and may 
continue to do so. For example, we believe that many of our target product developer and engineer customers have increasing 
e-commerce expectations, are facing increased pressure to accelerate the time to market for their products and continue to 
migrate from using 2D CAD to using 3D CAD for their design needs. We believe we continue to be well positioned to benefit 
from  these  trends,  given  our  proprietary  technology  that  enables  us  to  automate  and  integrate  the  majority  of  activities 
involved in procuring custom parts, starting with our elegant web interface through which a product developer or engineer 
submits  a  3D  CAD  part  design.  While  our  business  may  be  positively  affected  by  these  trends,  our  results  may  also  be 
favorably or unfavorably impacted by other trends that affect product developer and engineer orders for custom parts in low 
volumes, including, among others, changes in product developer and engineer preferences or needs, developments in our 
industry and among our competitors, and factors impacting new product development volume such as economic conditions. 
For a more complete discussion of the risks facing our business, see Part 1 Item 1A. “Risk Factors.” 

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Key Financial Measures and Trends 

Revenue 

Our operations are comprised of three geographic business units in the United States, Europe and Japan. Revenue is 
derived  from  our  Injection  Molding  (Protomold),  CNC  Machining  (Firstcut)  and  3D  Printing  (Fineline)  product  lines. 
Injection  Molding  (Protomold)  revenue  consists  of  sales  of  custom  injection  molds  and  injection-molded  parts.  CNC 
Machining (Firstcut) revenue consists of sales of CNC-machined custom parts. 3D Printing (Fineline) revenue consists of 
sales  of  3D-printed  parts.  Our  revenue  is  generated  from  a  diverse  customer  base,  with  no  single  customer  company 
representing more than 2% of our total revenue in 2015. Our historical and current efforts to increase revenue have been 
directed at gaining new customers and selling to our existing customer base by increasing marketing and selling activities, 
offering  additional  product  lines  such  as  the  introduction  of  our  CNC  Machining  (Firstcut)  product  line  in  2007  and  3D 
Printing (Fineline) through our acquisition of FineLine Prototyping, Inc. (FineLine) in 2014, expanding internationally such 
as the opening of our Japanese office in 2009 and through our acquisition of Alphaform in October 2015, improving the 
usability of our product lines such as our web-centric applications, and expanding the breadth and scope of our products such 
as by adding more sizes and materials to our offerings.  

During 2015, we served 27,235 unique product developers and engineers, an increase of 26% over the same period in 
2014. Of those product developers and engineers served in 2015, 13,504 were existing product developers and engineers who 
had ordered from  us  in  the  past,  an  increase  of 37%  over  the  comparable  period  in 2014,  and 13,731  were  new product 
developers and engineers who ordered from us for the first time in 2015, an increase of 17% over the comparable period in 
2014. 

During 2014, we served 21,552 unique product developers and engineers, an increase of 34% over the same period in 
2013. Of those product developers and engineers served in 2014, 9,839 were existing product developers and engineers who 
had ordered from  us  in  the  past,  an  increase  of 26%  over  the  comparable  period  in 2013,  and 11,713  were  new product 
developers and engineers who ordered from us for the first time in 2014, an increase of 41% over the comparable period in 
2013. We experienced strong growth in the number of unique product developers and engineers served in 2014, partially as 
a result of our acquisition of FineLine in April, 2014. 

During 2013, we served 16,128 unique product developers and engineers, an increase of 20% over the same period in 
2012. Of those product developers and engineers served in 2013, 7,826 were existing product developers and engineers who 
had ordered from us in the past, an increase of 30% over the comparable period in 2012, and 8,302 new product developers 
and engineers who ordered from us for the first time in 2013, an increase of 12% over the comparable period in 2012. 

Cost of Revenue, Gross Profit and Gross Margin 

Cost of revenue consists primarily of raw materials, equipment depreciation, employee compensation, benefits, stock-
based  compensation,  facilities  costs  and  overhead  allocations  associated  with  the  manufacturing  process  for  molds  and 
custom parts. We expect cost of revenue to increase in absolute dollars, but remain relatively constant as a percentage of total 
revenue. 

Our business model requires that we invest in our capacity well in advance of demand to ensure we can fulfill the 
expectations  for  quick  delivery  of  our  products  to  our  customers.  Therefore,  during  each  of  2015  and  2014  we  made 
significant investments in additional factory space and infrastructure in the United States. We expect to continue to grow in 
future periods, which will result in the need for additional investments in factory space and equipment. We expect that these 
additional costs for factory and equipment expansion can be absorbed by revenue growth, and allow gross margins to remain 
relatively consistent over time. 

We define gross profit as our revenue less our cost of revenue, and we define gross margin as gross profit expressed as 
a percentage of revenue. Our gross profit and gross margin are affected by many factors, including our pricing, sales volume 
and manufacturing costs, the costs associated with increasing production capacity, the mix between domestic and foreign 
revenue sources and foreign exchange rates. 

Our gross margins vary between geographic markets due primarily to the costs associated with starting new factories, 
available capacity and our operating maturity in these markets. We believe that over time and with growth and maturity of 
our international business, gross margins will be generally consistent through all our markets. 

Operating Expenses 

Operating expenses consist of marketing and sales, research and development and general and administrative expenses. 

Personnel-related costs are the most significant component in each of these categories. 

33 

 
  
Our recent growth in operating expenses is mainly due to higher headcounts to support our growth and expansion, and 
we  expect  that  trend  to  continue.  Our  business  strategy  is  to  continue  to  be  a  leading  online  and  technology-enabled 
manufacturer of quick-turn, on-demand 3D printing, CNC-machined and injection-molded custom parts for prototyping and 
short-run  production.  For  us  to  achieve  our  goals,  we  anticipate  continued  substantial  investments  in  technology  and 
personnel, resulting in increased operating expenses. 

Marketing  and  sales.  Marketing  and  sales  expense  consists  primarily  of  employee  compensation,  benefits, 
commissions, stock-based compensation, marketing programs such as print and pay-per-click advertising, trade shows, direct 
mail and other related overhead. We expect sales and marketing expense to increase in the future as we increase the number 
of marketing and sales professionals and marketing programs targeted to increase our customer base. 

Research and development. Research and development expense consists primarily of employee compensation, benefits, 
stock-based compensation, depreciation on equipment and other related overhead. All of our research and development costs 
have been expensed as incurred. We expect research and development expense to increase in the future as we seek to enhance 
and expand our product line offerings. 

General  and  administrative.  General  and  administrative  expense  consists  primarily  of  employee  compensation, 
benefits, stock-based compensation, professional service fees related to accounting, tax and legal, and other related overhead. 
We  expect  general  and  administrative  expense  to  increase  in  the  future  as  we  continue  to  grow  and  expand  as  a  global 
organization. 

Other Income (Expense), Net 

Other income (expense), net primarily consists of foreign currency-related gains and losses, interest income on cash 
balances  and  investments,  and  interest  expense  on  borrowings.  Our  foreign  currency-related  gains  and  losses  will  vary 
depending  upon  movements  in  underlying  exchange  rates.  Our  interest  income  will  vary  depending on our  average  cash 
balances during the period, composition of our marketable security portfolio and the current level of interest rates. Our interest 
expense will vary based on borrowings and interest rates. 

Provision for Income Taxes 

Provision for income taxes is comprised of federal, state, local and foreign taxes based on pre-tax income. We expect 

income taxes to increase as our taxable income increases and our effective tax rate to remain relatively constant. 

Results of Operations 

The following table sets forth a summary of our results of operations and the related changes for the periods indicated. 

The results below are not necessarily indicative of the results for future periods. 

(dollars in thousands) 

2015 

2014 

Year Ended 
December 31, 

      Change 
$ 

     %       

Year Ended 
December 31, 

2014 

2013 

      Change 
$ 

     %    

Revenue ................................   $  264,106       100.0%   $  209,583       100.0%   $  54,523      26.0%   $  209,583       100.0%   $  163,112       100.0%   $  46,471       28.5% 
Cost of revenue .....................      109,703        41.5         81,182        38.7         28,521      35.1        81,182        38.7         61,410        37.6         19,772       32.2  
Gross profit ...........................      154,403        58.5         128,401        61.3         26,002      20.3        128,401        61.3         101,702        62.4         26,699       26.3  
Operating expenses: 

Marketing and sales .........      39,188        14.8         29,144        13.9         10,044      34.5        29,144        13.9         22,386        13.7         6,758       30.2  
Research and 

development ..................      18,350       

6.9         16,607       

7.9         1,743      10.5        16,607       

7.9         11,863       

7.3         4,744       40.0  

General and 

administrative ................      29,716        11.3         22,122        10.6         7,594      34.3        22,122        10.6         16,154       
Total operating 

9.9         5,968       36.9  

expenses ....................      87,254        33.0         67,873        32.4        19,381      28.6        67,873        32.4         50,403        30.9         17,470       34.7  
Income from operations .......      67,149        25.5         60,528        28.9         6,621      10.9        60,528        28.9         51,299        31.5         9,229       18.0  
Other income, net .................     
*  
Income before income taxes .      67,861        25.7         60,531        28.9         7,330      12.1        60,531        28.9         51,578        31.6         8,953       17.4  
9.0         16,301        10.0         2,595       15.9  
Provision for income taxes ...      21,347       
Net income ............................   $  46,514        17.6%   $  41,635       19.9%   $  4,879      11.7%   $  41,635       19.9%   $  35,277       21.6%   $  6,358      18.0% 

9.0         2,451      13.0        18,896       

8.1         18,896       

0.1        

(276)     

0.0        

0.0        

0.2        

279       

712       

709       

*       

3       

3       

* 

Percentage change not meaningful 

34 

 
  
  
  
  
  
  
  
  
  
  
  
       
  
      
  
     
       
  
      
  
  
  
  
     
  
  
     
     
     
     
  
    
        
        
       
        
       
        
       
        
       
        
       
   
      
        
         
        
         
        
         
        
         
        
         
        
  
  
Stock-based compensation expense included in the statements of comprehensive income data above is as follows: 

(dollars in thousands) 

Stock options and grants ............................................    $ 
Employee stock purchase plan ...................................      
Total stock-based compensation expense ..................    $ 

Cost of revenue ..........................................................    $ 
Operating expenses: 

Marketing and sales ................................................     
Research and development .....................................     
General and administrative .....................................     
Total stock-based compensation expense ..................    $ 

2015 

Year Ended December 31, 
2014 

2013 

5,580    $ 
502      
6,082    $ 

513    $ 

1,074      
1,285      
3,210      
6,082    $ 

4,386     $ 
423       
4,809     $ 

386     $ 

927       
1,048       
2,448       
4,809     $ 

3,084   
377   
3,461   

316   

610   
754   
1,781   
3,461   

Comparison of Years Ended December 31, 2015 and 2014 

Revenue 

Revenue and the related changes for 2015 and 2014 were as follows: 

Year Ended December 31, 

2015 

2014 

Change 

$ 

% of Total 
Revenue       

$ 

% of Total 
Revenue       

$ 

     % 

(dollars in thousands) 

Revenue 

Injection Molding (Protomold) ..  $
CNC Machining (Firstcut) .........    
3D Printing (Fineline) ................    
Other  .........................................    
Total revenue .................................  $

163,387      
74,368       
25,132       
1,219       
264,106      

61.8 %   $
28.2        
9.5        
0.5        
100.0 %   $

140,282       
59,914       
9,387       
-      
209,583       

66.9%  $
28.6        
4.5        
-       
100.0%  $

23,105       
14,454       
15,745       
1,219       
54,523       

16.5 %
24.1   
167.7   
100.0   
26.0 %

Revenue by geographic region, based on the billing location of the end user customer, is summarized as follows: 

Year Ended December 31, 

2015 

2014 

Change 

$ 

% of Total 
Revenue       

$ 

% of Total 
Revenue       

$ 

     % 

(dollars in thousands) 

Revenue 

United States ..............................  $  194,065      
70,041       
International ...............................    
Total revenue .................................  $  264,106      

73.5%   $  156,033       
26.5       
53,550       
100.0%   $  209,583       

74.4%   $ 
25.6        
100.0%   $ 

38,032       
16,491       
54,523       

24.4% 
30.8   
26.0% 

35 

 
  
  
  
  
    
    
  
  
       
         
         
  
  
       
         
         
  
       
         
         
  
  
  
  
  
        
      
  
  
  
  
     
     
  
  
    
    
  
  
      
        
         
        
         
        
  
      
        
         
        
         
        
  
  
  
       
  
      
  
  
  
  
     
     
  
  
    
    
  
  
      
        
         
        
         
        
  
      
        
         
        
         
        
  
  
 
 
Our revenue  increased  $54.5  million, or 26.0%, for  2015 compared  with  2014.  By  geographic  region,  this  revenue 
growth was driven by a 24.4% increase in United States revenue and a 30.8% increase in international revenue. By product 
line, this revenue growth was driven by a 16.5% increase in Injection Molding (Protomold) revenue and a 24.1% increase in 
CNC Machining (Firstcut) revenue, in each case for 2015 compared with 2014, as well as a $15.7 million increase in revenue 
from 3D Printing (Fineline) and $1.2 million in Other revenue through our acquisition of Alphaform. 

Our revenue growth in 2015 was the result of increased volume of the product developers and engineers we served. 
During 2015, we served 27,235 unique product developers and engineers, an increase of 26% over 2014. Average revenue 
per product developer or engineer remained consistent during 2015 as compared to 2014. 

Our  revenue  increases  were  primarily  driven  by  increases  in  sales  personnel  and  marketing  activities.  Our  sales 
personnel focus on gaining new customer accounts and expanding the depth and breadth into existing customer accounts. 
Our marketing personnel focus on marketing activities that have proven to result in the greatest number of customer leads to 
support  sales  activity.  International  revenue  was  negatively  impacted  by  $7.5  million  in  2015  compared  to  2014  due  to 
strengthening of the United States dollar relative to the British Pound and Japanese Yen, as well as the strengthening of the 
British Pound relative to the Euro. The effect of pricing changes on revenue was immaterial for 2015 compared to 2014. 

Cost of Revenue, Gross Profit and Gross Margin 

Cost of Revenue. Cost of revenue increased $28.5 million, or 35.1%, for 2015 compared to 2014, which was greater 
than the rate of revenue increase of 26.0% for 2015 compared to 2014. The increase in cost of revenue was due to raw material 
and  production  cost  increases  of  $10.8  million  to  support  increased  sales  volumes,  equipment  and  facility-related  cost 
increases of $3.1 million and an increase in direct labor headcount resulting in personnel and related cost increases of $14.6 
million. 

Gross Profit and Gross Margin. Gross profit increased from $128.4 million, or 61.3% of revenues, in 2014 to $154.4 
million, or 58.5% of revenues, in 2015 primarily due to increasing revenue growth as noted above. Gross margin decreased 
primarily  as  a  result  of  our  3D  Printing  (Fineline)  product  line  having  a  lower  gross  margin  than  our  CNC  Machining 
(Firstcut)  and  Injection  Molding  (Protomold)  product  lines,  revenue  earned  through  our  acquistion  of  Alphaform  having 
lower gross margins than our legacy operations, the cost of increased capacity, which has not been fully leveraged, and the 
impact of fluctuations in foreign currency exchange rates. 

Operating Expenses, Other Income (Expense), Net and Provision for Income Taxes 

Marketing and Sales. Marketing and sales expense increased $10.0 million, or 34.5%, for 2015 compared to 2014 due 
to an increase in headcount resulting in personnel and related cost increases of $8.2 million and marketing program cost 
increases of $1.8 million. The increase in marketing program costs is the result of our focus and concentration on funding 
those programs which have proven to be the most effective in growing our business.  

Research  and  Development.  Our  research  and  development  expense  increased  $1.7  million,  or  10.5%,  for  2015 
compared to 2014 due to an increase in headcount resulting in personnel and related cost increases of $3.4 million and other 
operating cost increases of $0.2 million, which were partially offset by decreases in professional service costs of $1.9 million. 

General  and  Administrative.  Our  general  and  administrative  expense  increased  $7.6  million,  or  34.3%,  for  2015 
compared to 2014 due to an increase in headcount resulting in personnel and related cost increases of $4.4 million, facility 
and administrative cost increases of $1.5 million, professional service cost increases of $0.7 million for outside legal and 
accounting services, stock-based compensation cost increases of $0.8 and intangible amortization expense of $0.2 million.  

Other  Income  (Expense),  Net.  Other  income,  net  increased  $0.7  million  for  2015  compared  with  2014  due  to  $0.3 
million gain on the bargain purchase of Alphaform, $0.2 million increase in interest income and $0.2 million in other non-
operating activity.  

Provision  for  Income  Taxes.  Our  income  tax  provision  increased  $2.4  million  for  2015  compared  to  2014  due  an 
increase of taxable income. Our effective tax rate increased marginally to 31.5% in 2015 from 31.2% in 2014 due primarily 
to the mix of revenue earned in domestic and foreign tax jurisdictions and deductions for which we qualify in the current 
year. 

36 

 
  
  
  
  
  
  
  
  
  
  
  
   
 
 
Comparison of Years Ended December 31, 2014 and 2013 

Revenue 

Revenue and the related changes for 2014 and 2013 were as follows: 

Year Ended December 31, 

2014 

2013 

Change 

$ 

% of Total 
Revenue       

$ 

% of Total 
Revenue       

$ 

     % 

(dollars in thousands) 

Revenue 

Injection Molding (Protomold) ..  $
CNC Machining (Firstcut) .........    
3D Printing (Fineline) ................    
Total revenue .................................  $

140,282      
59,914       
9,387       
209,583      

66.9 %   $
28.6        
4.5        
100.0 %   $

115,069       
48,043       
-      
163,112       

70.5%  $
29.5        
-       
100.0%  $

25,213       
11,871       
9,387       
46,471       

21.9 %
24.7   
100.0   
28.5 %

Revenue by geographic region, based on the billing location of the end customer, is summarized as follows: 

Year Ended December 31, 

2014 

2013 

Change 

$ 

% of Total 
Revenue       

$ 

% of Total 
Revenue       

$ 

     % 

(dollars in thousands) 

Revenue 

United States ..............................  $  156,033      
53,550       
International ...............................    
Total revenue .................................  $  209,583      

74.4%   $  119,870       
43,242       
25.6       
100.0%   $  163,112       

73.5%   $ 
26.5        
100.0%   $ 

36,163       
10,308       
46,471       

30.2% 
23.8   
28.5% 

Our revenue  increased  $46.5  million, or 28.5%, for  2014 compared  with  2013.  By  geographic  region,  this  revenue 
growth was driven by a 30.2% increase in United States revenue and a 23.8% increase in international revenue. By product 
line, this revenue growth was driven by a 21.9% increase in Injection Molding (Protomold) revenue and a 24.7% increase in 
CNC Machining (Firstcut) revenue, in each case for 2014 compared with 2013, as well as $9.4 million in revenue from the 
FineLine acquisition. 

Our revenue growth in 2014 was the result of increased volume of the product developers and engineers we served. 
During 2014, we served 21,552 unique product developers and engineers, an increase of 34% over 2013. Average revenue 
per product developer or engineer decreased 4% during 2014 as compared to 2013. 

In  addition  to  revenue  gained  through  the  acquisition  of  FineLine,  our  revenue  increases  were  primarily  driven  by 
increases  in  sales  personnel  and  marketing  activities.  Our  sales  personnel  focus  on  gaining  new  customer  accounts  and 
expanding the depth and breadth into existing customer accounts. Our marketing personnel focus on marketing activities that 
have proven to result in the greatest number of customer leads to support sales activity. International revenue was negatively 
impacted by $0.1 million in 2014 compared to 2013 due to strengthening of the United States dollar relative to certain foreign 
currencies. The effect of pricing changes on revenue was immaterial for 2014 compared to 2013. 

Cost of Revenue, Gross Profit and Gross Margin 

Cost of Revenue. Cost of revenue increased $19.8 million, or 32.2%, for 2014 compared to 2013, which was greater 
than the rate of revenue increase of 28.5% for 2014 compared to 2013. The increase in cost of revenue was due to raw material 
and production cost increases of $5.8 million to support increased sales volumes, equipment and facility-related cost increases 
of $3.5 million and an increase in direct labor headcount resulting in personnel and related cost increases of $10.5 million. 

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Gross Profit and Gross Margin. Gross profit increased from $101.7 million, or 62.4% of revenues, in 2013 to $128.4 
million, or 61.3% of revenues, in 2014 primarily due to increasing revenue growth as noted above. Gross margin decreased 
primarily as a result of our 3D Printing (Fineline) product line having a lower gross margin than our legacy CNC Machining 
(Firstcut)  and  Injection  Molding  (Protomold)  product  lines  and  the  cost  of  increased  capacity,  which  has  not  been  fully 
leveraged. 

Operating Expenses, Other Expense, Net and Provision for Income Taxes 

Marketing and Sales. Marketing and sales expense increased $6.8 million, or 30.2%, for 2014 compared to 2013 due 
to an increase in headcount resulting in personnel and related cost increases of $4.9 million and marketing program cost 
increases of $1.9 million. The increase in marketing program costs is the result of our focus and concentration on funding 
those programs which have proven to be the most effective in growing our business.  

Research  and  Development.  Our  research  and  development  expense  increased  $4.7  million,  or  40.0%,  for  2014 
compared to 2013 due to an increase in headcount resulting in personnel and related cost increases of $4.0 million and other 
operating cost increases of $0.7 million. 

General  and  Administrative.  Our  general  and  administrative  expense  increased  $6.0  million,  or  36.9%,  for  2014 
compared to 2013 due to an increase in headcount resulting in personnel and related cost increases of $2.1 million, facility 
and administrative cost increases of $1.4 million, professional service cost increases of $1.3 million for outside legal and 
accounting services, stock-based compensation cost increases of $0.7 million and intangible amortization expenses of $0.5 
million.  

Other Income,  Net.  Other  income,  net  decreased $0.3  million  for 2014 compared with  2013 due  to $0.4  million  in 

unfavorable changes in foreign currency rates partially offset by $0.1 million increase in interest income. 

Provision for Income Taxes. Our income tax provision increased $2.6 million for 2014 compared to 2013 due to an 
increase of taxable income. Our effective tax rate decreased marginally to 31.2% in 2014 from 31.6% in 2013 due primarily 
to the mix of revenue earned in domestic and foreign tax jurisdictions and deductions for which we qualify in the current 
year. 

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Selected Quarterly Results of Operations Data 

The following tables set forth selected unaudited quarterly results of operations data for 2015 and 2014. This unaudited 
quarterly information has been prepared on the same basis as our annual audited consolidated financial statements appearing 
elsewhere in this Annual Report on Form 10-K and includes all adjustments, consisting only of normal recurring adjustments, 
that we consider necessary to present fairly the financial information for the fiscal quarters presented. The quarterly data 
should be read in conjunction with our selected financial data and consolidated financial statements and the related notes 
appearing elsewhere in this Annual Report on Form 10-K. Operating results for any quarter are not necessarily indicative of 
results for a full-year period, and the historical results presented below are not necessarily indicative of the results to be 
expected in any future period. 

(in thousands, except 
share and per share 
amounts) 

Dec. 31, 2015 

Sep. 30, 2015 

Jun. 30, 2015 

Mar. 31, 2015 

Dec. 31, 2014 

Sep. 30, 2014 

Jun. 30, 2014 

Mar. 31, 2014 

(unaudited) 

Three Months Ended 

Consolidated 

Statements of 
Comprehensive 
Income Data: 

Revenue .......................   $ 
Cost of revenue ............     
Gross profit ..................     
Operating expenses: 

Marketing and sales     
Research and 

development ........     

General and 

administrative ......     
Total operating 
expenses ............     

Income from 

73,759     $ 
32,485       
41,274       

67,842     $ 
27,517       
40,325       

63,969    $ 
26,419      
37,550      

58,536     $ 
23,282       
35,254       

56,069     $ 
22,457       
33,612       

54,574     $ 
21,492       
33,082       

52,866     $ 
20,183       
32,683       

10,805       

10,027       

9,502      

8,854       

8,115       

7,351       

7,261       

4,879       

4,760       

4,397      

4,314       

4,682       

4,555       

3,914       

9,033       

8,134       

6,304      

6,245       

6,152       

5,733       

5,534       

46,074   
17,050   
29,024   

6,417   

3,456   

4,703   

24,717       

22,921       

20,203      

19,413       

18,949       

17,639       

16,709       

14,576   

operations .................     

16,557       

17,404       

17,347      

15,841       

14,663       

15,443       

15,974       

14,448   

Other income 

(expense), net ...........     

Income before income 

taxes..........................     

Provision for income 

taxes..........................     
Net income ...................   $ 

Net income per share:         
Basic .......................   $ 
Diluted ....................   $ 

Shares used to 

compute net income 
per share: 
Basic .......................     
Diluted ....................     

612       

593       

(36)     

(457 )     

22       

(56)     

(66)     

103   

17,169       

17,997       

17,311      

15,384       

14,685       

15,387       

15,908       

14,551   

5,176       
11,993     $ 

5,615       
12,382     $ 

5,625      
11,686    $ 

4,931       
10,453     $ 

4,492       
10,193     $ 

5,003       
10,384     $ 

4,952       
10,956     $ 

4,449   
10,102   

0.46     $ 
0.45     $ 

0.47     $ 
0.47     $ 

0.45     $ 
0.44     $ 

0.40     $ 
0.40     $ 

0.39     $ 
0.39     $ 

0.40     $ 
0.40     $ 

0.43     $ 
0.42     $ 

0.40   
0.39   

26,164,340       
26,465,043       

26,083,405       
26,381,313       

25,921,111      
26,277,503      

25,850,274       
26,214,204       

25,815,973       
26,152,891       

25,757,593       
26,200,741       

25,620,005       
26,146,848       

25,573,851   
26,091,069   

 Liquidity and Capital Resources 

Cash Flows 

The following table summarizes our cash flows for the years ended December 31, 2015, 2014 and 2013: 

(dollars in thousands) 

Year Ended December 31, 
2014 

2013 

2015 

Net cash provided by operating activities ..........................................   $ 
Net cash used in investing activities...................................................     
Net cash provided by financing activities ..........................................     
Effect of exchange rates on cash and cash equivalents ......................     
Net increase in cash and cash equivalents ..........................................   $ 

58,557     $ 
(63,594)     
10,238       
(877)     
4,324     $ 

57,210     $ 
(63,499 )     
7,036       
(457 )     
290     $ 

48,441   
(58,481) 
16,111   
209   
6,280   

39 

 
  
  
  
  
  
    
    
    
    
    
    
    
  
  
  
  
       
         
         
         
         
         
         
         
  
       
         
         
         
         
         
         
         
  
  
       
         
         
         
         
         
         
         
  
         
         
         
         
         
         
         
  
  
       
         
         
         
         
         
         
         
  
       
         
         
         
         
         
         
         
  
  
  
  
  
  
  
    
    
  
  
      
        
        
  
 
 
Sources of Liquidity 

Historically, we have financed our operations and capital expenditures primarily through cash flow from operations 

and, to a lesser extent, lease financing. 

We had cash and cash equivalents of $47.7 million as of December 31, 2015, an increase of $4.3 million from December 
31, 2014. The increase in our cash was due primarily to cash generated through operations and exercises of stock options, 
which were partially reduced by investment activity. We had cash and cash equivalents of $43.3 million as of December 31, 
2014, an increase of $0.3 million from December 31, 2013. The increase in our cash was due primarily to cash generated 
through operations and exercises of stock options, which were partially reduced by investment activity. We had cash and 
cash equivalents of $43.0 million as of December 31, 2013, an increase of $6.3 million from December 31, 2012. The increase 
in  our  cash was  due primarily  to  cash generated  through operations  and  exercises of  stock options, which were  partially 
reduced by investment activity. 

As of December 31, 2015, the amount of cash and cash equivalents held by foreign subsidiaries was $16.8 million. If 
these funds are needed for our domestic operations, we would be required to accrue and pay U.S. taxes to repatriate these 
funds. However, our intent is to permanently reinvest these funds outside the U.S. and our current plans do not demonstrate 
a need to repatriate them to fund our domestic operations. We believe that our existing cash and cash equivalents together 
with cash generated from operations will be sufficient to meet our working capital expenditure requirements for at least the 
next 12 months. 

Cash Flows from Operating Activities 

Cash flow from operating activities during 2015 primarily consisted of net income of $46.5 million, adjusted for certain 
non-cash items, including depreciation and amortization of $14.1 million and stock-based compensation expense of $6.1 
million, partially offset by excess tax benefit from stock-based compensation expense of $5.5 million. The cash flow from 
operating activities during 2015 compared to 2014 increased $1.3 million due to increases in net income of $4.9 million, 
depreciation and amortization of $3.0 million, deferred taxes of $4.7 million and stock-based compensation expense of $1.3 
million, which were partially offset by a gain on acquisition of $0.3 million, an increase in excess tax benefit from stock-
based compensation of $1.1 million, and decreases in amortization of held-to-maturity securities of $0.3 million and changes 
in operating assets and liabilities of $10.9 million. 

Cash flow from operating activities during 2014 primarily consisted of net income of $41.6 million, adjusted for certain 
non-cash items, including depreciation and amortization of $11.1 million and stock-based compensation expense of $4.8 
million, partially offset by excess tax benefit from stock-based compensation expense of $4.5 million. The cash flow from 
operating activities during 2014 compared to 2013 increased $8.8 million due to increases in net income of $6.4 million, 
depreciation and amortization of $3.5 million, stock-based compensation expense of $1.3 million and a decrease in excess 
tax benefit from stock-based compensation of $5.4 million, which were partially offset by decreases in deferred taxes of $2.3 
million and changes in operating assets and liabilities of $5.5 million. 

Cash flow from operating activities during 2013 primarily consisted of net income of $35.3 million, adjusted for certain 
non-cash  items,  including  depreciation  and  amortization  of  $7.6  million  and  stock-based  compensation  expense  of  $3.5 
million, partially offset by excess tax benefit from stock-based compensation expense of $9.9 million. 

Cash Flows from Investing Activities 

Cash used in investing activities was $63.6 million for the year ended December 31, 2015, consisting of $44.4 million 
for the purchase of property and equipment primarily to expand our production capacity, $5.0 million for the payments on 
business acquisitions and $66.4 million for the purchase of marketable securities, which were partially offset by $52.2 million 
in proceeds from maturities and call redemption of marketable securities.  

Cash used in investing activities was $63.5 million for the year ended December 31, 2014, consisting of $43.5 million 
for  the purchase  of property and  equipment  primarily  to  expand  our  production  capacity,  $33.9  million for payments  on 
business  acquisitions  and  $60.2  million  for  the  purchases  of  marketable  securities,  which  were  partially  offset  by  $74.1 
million in proceeds from maturities and call redemption of marketable securities.  

Cash used in investing activities was $58.5 million for the year ended December 31, 2013, consisting of $18.8 million 
for the purchase of property and equipment primarily to expand our production capacity and $106.3 million for the purchases 
of marketable securities, which were partially offset by $66.6 million in proceeds from maturities and call redemption of 
marketable securities.  

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 Cash Flows from Financing Activities 

Cash provided by financing activities was $10.2 million for the year ended December 31, 2015, consisting of excess 
tax benefit on stock-based compensation of $5.5 million and $6.3 million in proceeds from exercises of stock options, partially 
offset by $0.2 million for payments of debt and $1.4 million for payments of acquisition-related contingent consideration. 

Cash provided by financing activities was $7.0 million for the year ended December 31, 2014, consisting of excess tax 
benefit on stock-based compensation of $4.5 million and $4.8 million in proceeds from exercises of stock options, partially 
offset by $1.1 million for payments of debt and $1.2 million for payments of acquisition-related contingent consideration. 

Cash provided by financing activities was $16.1 million for the year ended December 31, 2013, consisting of excess 
tax benefit on stock-based compensation of $9.9 million and $6.5 million in proceeds from exercises of stock options, partially 
offset by $0.3 million for payments of debt.  

Operating and Capital Expenditure Requirements 

We believe, based on our current operating plan, that our cash balances and cash generated through operations and 
interest income will be sufficient to meet our anticipated cash requirements through at least the next 12 months. From time 
to time we may seek to sell equity or convertible debt securities or enter into credit facilities. The sale of equity and convertible 
debt securities may result in dilution to our shareholders. If we raise additional funds through the issuance of convertible debt 
securities or enter into credit facilities, these securities and debt holders could have rights senior to those of our common 
stock, and this debt could contain covenants that would restrict our operations. We may require additional capital beyond our 
currently forecasted amounts. Any such required additional capital may not be available on terms acceptable to us, or at all. 

Our future capital requirements will depend on many factors, including the following: 

• 

the revenue growth in Injection Molding (Protomold), CNC Machining (Firstcut) and 3D Printing (Fineline) product 
lines; 

•  costs of operations, including costs relating to expansion and growth; 

• 

• 

• 

the emergence of competing or complementary technological developments; 

the  costs  of  filing,  prosecuting,  defending  and  enforcing  any  patent  claims  and  other  intellectual  product  rights,  or
participating in litigation-related activities; and 

the acquisition of businesses, products and technologies, although we currently have no commitments or agreements
relating to any of these types of transactions. 

Our annual capital expenditures generally have varied between approximately 8% and 19% of annual revenue. We 
believe  future  growth  capital  expenditures,  excluding  any  expenditures  for  buildings  and  maintenance  capital  we  might 
purchase for our operations, are likely to vary between approximately 8% and 12% of annual revenue. 

Contractual Obligations 

As  of  December  31,  2015,  our  contractual  obligations  and  the  effect  such  obligations  are  expected  to  have  on  our 

liquidity and cash flows in future periods were as follows: 

(in thousands) 

Total 

Less than  
1 Year 

     1-3 Years 

     3-5 Years 

More than  
5 Years 

Payment Due by Period 

Operating leases ................................   $ 
Total ..................................................   $ 

5,717     $ 
5,717     $ 

2,041     $ 
2,041     $ 

2,021     $ 
2,511     $ 

952    $ 
462     $ 

703   
703   

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The table above reflects only payment obligations that are fixed and determinable. Our commitments for operating 
leases relate to three of our United States manufacturing facilities, our European sales, customer service and technical support 
offices,  three  Alphaform  manufacturing  and  office  facilities  located  in  Germany  and  Finland  and  our  Japan  facility. 
Subsequent to the acquisition of Alphaform, we entered into lease agreements for facilities located in Germany and Finland 
as referenced above. These obligations are included in the table above. 

Financing Arrangements 

The following table summarizes our financing arrangements as of December 31, 2015 and 2014: 

(in thousands) 

December 31,  

2015 

2014 

Various obligations under capital leases, with interest rates from 6.8% to 7.4%, due in 

various monthly installments, including interest, through various dates through 
January 2016, secured by equipment ............................................................................   $ 
Less current portion ..........................................................................................................     
Long-term obligation .......................................................................................................   $ 

-    $ 
-      
-    $ 

149   
139   
10   

Inflation 

We believe that inflation and changing prices have not had a material effect on our financial condition during the three 

most recent fiscal years.  

Off-Balance Sheet Arrangements 

Since our inception, we have not engaged in any off-balance sheet arrangements, including the use of structured finance, 

special purpose entities or variable interest entities. 

Critical Accounting Policies and Use of Estimates 

The discussion and analysis of our financial condition and results of operations is based upon our consolidated financial 
statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The 
preparation of these financial statements requires us to make estimates, judgments and assumptions that affect the reported 
amount  of  assets,  liabilities,  revenue,  expenses  and  related  disclosures.  On  an  ongoing  basis,  we  evaluate  our  estimates, 
including  those  related  to  revenue  recognition,  goodwill,  other  intangible  assets,  stock-based  compensation,  and  income 
taxes. We base our estimates of the carrying value of certain assets and liabilities on historical experience and on various 
other assumptions that we believe to be reasonable under the circumstances. In many cases, we could reasonably have used 
different accounting policies and estimates. In some cases, changes in the accounting estimates are reasonably likely to occur 
from period to period. Management has discussed the development, selection and disclosure of these estimates with the audit 
committee  of  our  board  of  directors.  Our  actual  results  may  differ  significantly  from  these  estimates  under  different 
assumptions or conditions. 

We believe the following critical accounting policies affect our more significant judgments used in the preparation of 
our consolidated financial statements. See the Notes to Consolidated Financial Statements included in Item 8. “Financial 
Statements and Supplementary Data” in this Annual Report on Form 10-K for additional information about these critical 
accounting policies, as well as a description of our other accounting policies. 

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Revenue Recognition 

We  recognize revenue  in  accordance  with ASC  605,  Revenue Recognition,  which states  that  revenue  is  realized  or 
realizable and earned when all of the following criteria are met: (1) persuasive evidence of an arrangement exists, (2) delivery 
has occurred  or  services  have  been rendered, (3)  the price  to  the buyer is  fixed or determinable,  and  (4)  collectability  is 
reasonably assured. 

Revenue  is  recognized  upon  transfer  of  title  and  risk  of  loss,  which  is  generally  upon  the  shipment  of  parts  in  our 

Injection Molding (Protomold), CNC Machining (Firstcut), 3D Printing (Fineline) and Other product lines. 

Goodwill 

We recognize goodwill in accordance with ASC 350, Intangibles—Goodwill and Other. Goodwill is the excess of cost 
of an acquired entity over the amounts assigned to assets acquired and liabilities assumed in a business combination. Goodwill 
is not amortized. Goodwill is tested for impairment annually in the fourth quarter of each year, and is tested for impairment 
between annual tests if an event occurs or circumstances change that would indicate the carrying amount may be impaired. 
An impairment charge for goodwill is recognized only when the estimated fair value of a reporting unit, including goodwill, 
is less than its carrying amount. As of December 31, 2015 no impairment charges for goodwill have been recognized. 

Other Intangible Assets 

We recognize other intangibles assets in accordance with ASC 350, Intangibles—Goodwill and Other. Other intangible 
assets include internally developed software, customer relationships and other intangible assets acquired from an independent 
party. Other intangible assets with a definite life are amortized over a period ranging from two to 10 years on a straight line 
basis. Other intangible assets with a definite life are tested for impairment whenever events or circumstances indicate that the 
carrying  amount  of  an  asset  (asset  group)  may  not  be  recoverable.  An  impairment  loss  is  recognized  when  the  carrying 
amount of an asset exceeds the estimated undiscounted cash flows used in determining the fair value of the asset. As of 
December 31, 2015 no impairment charges for intangible assets have been recognized. 

Stock-Based Compensation 

We determine our stock-based compensation in accordance with ASC 718, Compensation—Stock Compensation (ASC 
718), which requires the measurement and recognition of compensation expense for all share-based payment awards made 
to employees and non-employee directors based on the grant date fair value of the award. 

Determining the appropriate fair value model and calculating the fair value of stock option grants requires the input of 
subjective  assumptions.  We  use  the  Black-Scholes  option  pricing  model  to  value  our  stock  option  awards.  Stock-based 
compensation expense is significant to our consolidated financial statements and is calculated using our best estimates, which 
involve inherent uncertainties and the application of management’s judgment. Significant estimates include our expected 
term, stock price volatility and forfeiture rates. If different estimates and assumptions had been used, our common stock 
valuations could be significantly different and related stock-based compensation expense may be materially impacted. 

The  Black-Scholes option pricing  model  requires  inputs  such  as  the risk-free  interest  rate,  expected  term,  expected 
volatility and expected dividend yield. We base the risk-free interest rate that we use in the Black-Scholes option pricing 
model on zero coupon U.S. Treasury instruments with maturities similar to the expected term of the award being valued. The 
expected term represents the weighted average period that our stock options are expected to be outstanding. The expected 
term is based on the observed and expected time to post-vesting exercise of options by employees and non-employee directors 
and considers the impact of post-vesting award forfeitures. As we operated as a private company with a limited market for 
our stock from our inception to the completion of our initial public offering on February 29, 2012, we have estimated the 
volatility of stock price using outside valuation services and an estimate of the volatility of our common stock based on 
volatility of a peer group of comparable publicly traded companies for which historical information is available. We have 
never  paid  and  do  not  anticipate  paying  any  cash  dividends  in  the  foreseeable  future  and,  therefore,  we  use  an  expected 
dividend yield of zero in the option pricing model. In order to properly attribute compensation expense, we are required to 
estimate pre-vesting forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ 
from those estimates. We use historical data to estimate pre-vesting forfeitures and record stock-based compensation expense 
only for those awards that are expected to vest. If our actual forfeiture rate is materially different from our estimate, stock-
based compensation expense could be significantly different from what has been recorded. 

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The fair value of each new employee and non-employee director option awarded was estimated on the date of grant for 

the periods below using the Black-Scholes option pricing model with the following assumptions: 

Year Ended December 31, 
2014 

2013 

2015 

Risk-free interest rate ...............................................................   1.69 
Expected life (years) ................................................................   5.50 
Expected volatility ...................................................................  46.80 
Expected dividend yield ...........................................................    
Weighted average grant date fair value ....................................  

    2.00 -  6.50 

-  1.77%      0.43 -  2.14%       1.03 -  1.98%   
-  6.50 
-  47.23%    47.29 -  49.30%     49.36 -  53.54%  
0%    
$ 32.42 

     5.50 -  6.50 

0%    
$32.65 

0%    
$25.86 

Our 2012 Employee Stock Purchase Plan (ESPP) allows eligible employees to purchase shares of our common stock at 
a discount through payroll deductions of up to 15 percent of their eligible compensation, subject to plan limitations. The 
ESPP provides for six-month offering periods, and at the end of each offering period, employees are able to purchase shares 
at 85 percent of the lower of the fair market value of our common stock on the first trading day of the offering period or on 
the last trading day of the offering period.  

The fair value of each offering period was estimated using the Black-Scholes option pricing model with the following 

assumptions: 

Year ended December 31, 
2014 

2015 

2013 

Risk-free interest rate ..................................................................    0.08 -  0.39%       0.01 -  0.11%       0.11 -  0.13%   
Expected life (months) ................................................................     
Expected volatility ......................................................................    29.41 -  37.64%     37.64 -  39.80%     39.80 -  53.32%  
Expected dividend yield ..............................................................     

0%   

0%   

0%   

6.00 

6.00 

6.00 

There are significant differences among option valuation models, and this may result in a lack of comparability with 
other companies that use different models, methods and assumptions. If factors change and we employ different assumptions 
in the application of ASC 718 in future periods, or if we decide to use a different valuation model, such as a lattice model, 
the stock-based compensation expense that we record in the future under ASC 718 may differ significantly from what we 
have recorded using the Black-Scholes option pricing model and could materially affect our operating results. 

We recognize stock-based compensation expense on a straight-line basis over the requisite service period. We recorded 
stock-based compensation expense of $6.1 million, $4.8 million and $3.5 million during the years ended December 31, 2015, 
2014 and 2013, respectively. As of December 31, 2015, we had $7.0 million of unrecognized stock-based compensation costs 
related to unvested stock options, net of estimated forfeitures, that are expected to be recognized over a weighted average 
period of 3.1 years. We issued options to purchase 110,335, 116,050 and 187,615 shares of our common stock in 2015, 2014 
and 2013, respectively. 

In future periods, our stock-based compensation expense is expected to increase due to our existing unrecognized stock-
based compensation and the issuance of additional stock-based awards to continue to attract and retain employees and non-
employee directors.  

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Income Taxes 

We account for income taxes in accordance with ASC 740, Income Taxes (ASC 740). Under this method, we determine 
tax assets and liabilities based upon the differences between the financial statement carrying amounts and the tax basis of 
assets  and  liabilities  using  enacted  tax  rates  in  effect for  the year  in  which  the differences  are  expected  to  affect  taxable 
income.  The  tax  consequences  of  most  events  recognized  in  the  current  year’s  financial  statements  are  included  in 
determining income taxes currently payable. However, because tax laws and financial accounting standards differ in their 
recognition and measurement of assets, liabilities and equity, revenues, expenses, gains and losses, differences arise between 
the amount of taxable income and pretax financial income for a year and between the tax basis of assets or liabilities and their 
reported amounts in the financial statements. Because we assume that the reported amounts of assets and liabilities will be 
recovered and settled, respectively, a difference between the tax basis of an asset or liability and its reported amount in the 
balance sheet will result in a taxable or a deductible amount in some future years when the related liabilities are settled or the 
reported amounts of the assets are recovered, giving rise to a deferred tax asset or liability. We establish a valuation allowance 
for any portion of our deferred tax assets that we believe will not be recognized. 

ASC 740 also clarifies the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements 
by defining a criterion that an individual tax position must meet for any part of the benefit of that position to be recognized 
in  an  enterprise’s  financial  statements.  Additionally,  ASC  740  provides  guidance  on  measurement,  de-recognition, 
classification, interest and penalties, accounting in interim periods, disclosure and transition. Including interest and penalties, 
we have established a liability for uncertain tax positions of $2.9 million as of December 31, 2015. 

Recent Accounting Pronouncements 

         In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) No. 2014-
09, Revenue from Contracts with Customers. This ASU is a comprehensive new revenue recognition model that requires a 
company to recognize revenue from the transfer of goods or services to customers in an amount that reflects the consideration 
that  the  entity  expects  to  receive  in  exchange  for  those  goods  or  services.  The  Company  is  required  to  adopt  the  new 
pronouncement using one of two retrospective application methods.  

         On July 9, 2015, the (FASB) voted to approve a deferral of the effective date of ASU 2014-09 by one year to December 
15, 2017 for annual reporting periods beginning after that date. The Company is evaluating the application method and the 
impact of this new standard on our financial statements, but does not expect the impact to be material. 

In April 2015, the FASB issued ASU No. 2015-05, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 
350-40): Customer's Accounting for Fees Paid in a Cloud Computing Arrangement. Under this standard, if a cloud computing 
arrangement includes a software license, the software license element of the arrangement should be accounted for consistent 
with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the 
arrangement should be accounted for as a service contract. The Company is required to adopt the new standard on January 
1, 2016. The adoption of this standard is not expected to have a material impact on the Company’s financial position or results 
of operations. 

In July 2015, the FASB issued ASU No. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory. 
The new standard applies only to inventory for which cost is determined by methods other than last-in, first-out and the retail 
inventory method, which includes inventory that is measured using first-in, first-out or average cost. Inventory within the 
scope of this standard is required to be measured at the lower of cost and net realizable value. Net realizable value is the 
estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and 
transportation. The Company is required to adopt the new standard on January 1, 2017. The adoption of this standard is not 
expected to have an impact on the Company’s financial position or results of operations. 

In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805): Simplifying the Accounting 
for  Measurement-Period  Adjustments  (ASU  2015-16).  ASU  2015-16  eliminates  the  requirement  to  restate  prior  period 
financial  statements  for  measurement  period  adjustments.  The  new  guidance  requires  that  the  cumulative  impact  of  a 
measurement period adjustment (including the impact on prior periods) be recognized in the reporting period in which the 
adjustment is identified. In addition, separate presentation on the face of the income statement or disclosure in the notes is 
required regarding the portion of the adjustment recorded in the current period earnings, by line item, that would have been 
recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition 
date. ASU 2015-16 is to be applied prospectively for measurement period adjustments that occur after the effective date. 
ASU 2015-16 is effective for annual reporting periods, including interim reporting periods within those periods, beginning 
after December 15, 2015, and early adoption is permitted. The Company elected to early adopt this standard as of December 

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31, 2105. Since it is prospective, the impact of ASU 2015-16 on the Company's financial condition and earnings will depend 
upon the nature of any measurement period adjustments identified in future periods. 

On  November  20, 2015,  the FASB  issued ASU  No.  2015-17,  Balance Sheet  Classification  of Deferred  Taxes.  The 
standard  amends  the  current  requirement  for  organizations  to  present  deferred  tax  assets  and  liabilities  as  current  and 
noncurrent in a classified balance sheet. Instead, organizations will now be required to classify all deferred tax assets and 
liabilities  as  noncurrent.  The  ASU  is  effective  for  fiscal  years,  and  interim  periods  within  those  years,  beginning  after 
December 15, 2016, with early adoption permitted. The Company early adopted this standard during fourth quarter 2015, 
utilizing retrospective application as permitted. As such, certain prior period amounts have been reclassified to conform to 
the current presentation. In the Consolidated Balance Sheet as of December 31, 2014, the Company reclassified $0.5 million 
from current deferred income tax assets to reduce deferred income taxes within non-current liabilities.  

Item 7A. Quantitative and Qualitative Disclosures About Market Risk 

Quantitative and Qualitative Disclosure of Market Risks 

Our exposure to market risk is confined to our cash and cash equivalent balances and investments. The primary goals 
of our investment policy are preservation of capital, fulfillment of liquidity needs and fiduciary control of cash and cash 
equivalent balances. We also seek to maximize income from our investments without assuming significant risk. To achieve 
our goals, we maintain a portfolio of debt securities with various maturities ranging from one to three years. Due to the nature 
of our investment portfolio, we are subject to interest rate risks, which we mitigate by holding our investments to maturity. 
In future periods, we will continue to evaluate our investment policy in order to continue our overall goals. 

Foreign Currency Risk 

As a result of our foreign operations, we have revenue, expenses, assets and liabilities that are denominated in foreign 
currencies. We generate revenue and incur production costs and operating expenses in British Pound, Euro and Japanese 
Yen.  

Our operating results and cash flows are adversely impacted when the United States dollar appreciates relative to other 
foreign  currencies.  Additionally,  our  operating  results  and  cash  flows  are  adversely  impacted  when  the  British  Pound 
appreciates  relative  to  the  Euro.  As  we  expand  internationally,  our  results  of  operations  and  cash  flows  will  become 
increasingly subject to changes in foreign exchange rates.  

We have not used forward contracts or currency borrowings to hedge our exposure to foreign currency risk. Foreign 
currency  risk  can  be  quantified  by  estimating  the  change  in  results  of  operations  or  financial  position  resulting  from  a 
hypothetical 10% adverse change in foreign exchange rates. We believe such a change would not have a material impact on 
our financial position, but could have a material impact on our results of operations. We recognized foreign currency losses 
for the three years ended December 31, 2015, 2014 and 2013 of $0.5 million, $0.4 million and 0.1 million, respectively. 

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Item 8. Financial Statements and Supplementary Data 

Proto Labs, Inc. 
Index to Consolidated Financial Statements 

Report of Independent Registered Public Accounting Firm on Consolidated Financial Statements ......................  
Report of Independent Registered Public Accounting Firm ....................................................................................  
Consolidated Balance Sheets at December 31, 2015 and 2014 ...............................................................................  
Consolidated Statements of Comprehensive Income for the years ended December 31, 2015, 2014 and 2013 .....  
Consolidated Statements of Shareholders' Equity for the years ended December 31, 2015, 2014 and 2013 ..........  
Consolidated Statements of Cash Flows for the years ended December 31, 2015, 2014 and 2013 ........................  
Notes to Consolidated Financial Statements ...........................................................................................................  

Page 
48 
49 
50 
51 
52 
53 
54 

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Report of Independent Registered Public Accounting Firm  

The Board of Directors and Shareholders 
Proto Labs, Inc. 

We have audited the accompanying consolidated balance sheets of Proto Labs, Inc. as of December 31, 2015 and 2014, and 
the related consolidated statements of comprehensive income, shareholders' equity and cash flows for each of the three years 
in the period ended December 31, 2015. These financial statements are the responsibility of the Company's management. Our 
responsibility is to express an opinion on these financial statements based on our audits. 

We  conducted  our  audits  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board  (United 
States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial 
statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts 
and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant 
estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits 
provide a reasonable basis for our opinion. 

In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial 
position of Proto Labs, Inc. at December 31, 2015 and 2014, and the consolidated results of its operations and its cash flows 
for each of the three years in the period ended December 31, 2015, in conformity with U.S. generally accepted accounting 
principles. 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), 
Proto Labs, Inc.’s internal control over financial reporting as of December 31, 2015, based on criteria established in Internal 
Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 
framework) and our report dated February 26, 2016 expressed an unqualified opinion thereon. 

 /s/ Ernst & Young LLP 

Minneapolis, Minnesota  
February 26, 2016       

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Report of Independent Registered Public Accounting Firm 

The Board of Directors and Shareholders  
Proto Labs, Inc.  

We  have  audited  Proto  Labs,  Inc.’s  internal  control  over  financial  reporting  as  of  December  31,  2015,  based  on  criteria 
established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway 
Commission (2013 framework) (the COSO criteria). Proto Labs, Inc.’s management is responsible for maintaining effective 
internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting 
included  in  the  accompanying  Management’s  Annual  Report  on  Internal  Control  Over  Financial  Reporting.  Our 
responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. 

We  conducted  our  audit  in  accordance  with  the  standards  of  the  Public  Company  Accounting  Oversight  Board  (United 
States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective 
internal  control  over  financial  reporting  was  maintained  in  all  material  respects.  Our  audit  included  obtaining  an 
understanding  of  internal  control  over  financial  reporting,  assessing  the  risk  that  a  material  weakness  exists,  testing  and 
evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other 
procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our 
opinion. 

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the 
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally 
accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures 
that  (1) pertain  to  the  maintenance  of  records  that,  in reasonable detail,  accurately  and  fairly  reflect  the  transactions  and 
dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to 
permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and 
expenditures of the company are being made only in accordance with authorizations of management and directors of the 
company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or 
disposition of the company’s assets that could have a material effect on the financial statements. 

Because  of  inherent  limitations,  internal  control  over  financial  reporting  may  not  prevent  or  detect  misstatements.  Also, 
projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate 
because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. 

As  indicated  in  the  accompanying  Management’s  Annual  Report  on  Internal  Control  Over  Financial  Reporting, 
management’s assessment of and conclusion on the effectiveness of internal control over financial reporting did not include 
the internal controls of Alphaform AG., the results of which are included in the 2015 consolidated financial statements of 
Proto Labs, Inc. and constituted approximately 6% of total assets as of December 31, 2015, and 2% of total revenues for the 
year then ended. Our audit of internal control over financial reporting of Proto Labs, Inc. also did not include an evaluation 
of the internal control over financial reporting of Alphaform AG. 

In our opinion, Proto Labs, Inc. maintained, in all material respects, effective internal control over financial reporting as of 
December 31, 2015, based on the COSO criteria. 

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), 
the consolidated balance sheets of Proto Labs, Inc. as of December 31, 2015 and 2014, and the related consolidated statements 
of comprehensive income, shareholders’ equity, and cash flows for each of the three years in the period ended December 31, 
2015, and our report dated February 26, 2016, expressed an unqualified opinion thereon. 

 /s/ Ernst & Young LLP 

Minneapolis, Minnesota 
February 26, 2016 

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Proto Labs, Inc. 
Consolidated Balance Sheets 
(In thousands, except share and per share amounts) 

Assets 
Current assets 

Cash and cash equivalents ............................................................................................   $
Short-term marketable securities ..................................................................................     
Accounts receivable, net of allowance for doubtful accounts of $330 and $198 as of 

December 31, 2015 and December 31, 2014, respectively .......................................     
Inventory .......................................................................................................................     
Prepaid expenses and other current assets ....................................................................     
Income taxes receivable ................................................................................................     
Total current assets ....................................................................................................     
Property and equipment, net .............................................................................................     
Goodwill ...........................................................................................................................     
Other intangible assets, net ...............................................................................................     
Long-term marketable securities ......................................................................................     
Other long-term assets ......................................................................................................     
Total assets ................................................................................................................   $

Liabilities and shareholders' equity 
Current liabilities 

Accounts payable ..........................................................................................................   $
Accrued compensation..................................................................................................     
Accrued liabilities and other .........................................................................................     
Income taxes payable ....................................................................................................     
Current portion of long-term debt obligations ..............................................................     
Total current liabilities ..............................................................................................     
Long-term deferred tax liabilities .....................................................................................     
Long-term debt obligations ..............................................................................................     
Other long-term liabilities ................................................................................................     
Total liabilities ..........................................................................................................     

Shareholders' equity 

Preferred stock, $0.001 par value, authorized 10,000,000 shares; issued and 
outstanding 0 shares as of December 31, 2015 and December 31, 2014, 
respectively  .............................................................................................................. 

Common stock, $0.001 par value, authorized 150,000,000 shares; issued and 

outstanding 26,200,718 and 25,838,110 shares as of December 31, 2015 and 
December 31, 2014, respectively  .............................................................................     
Additional paid-in capital .............................................................................................     
Retained earnings .........................................................................................................     
Accumulated other comprehensive loss .......................................................................     
Total shareholders' equity .........................................................................................     
Total liabilities and shareholders' equity ...................................................................   $

December 31, 

2015 

2014 

47,653     $
33,201       

36,125       
9,771       
5,224       
6,028       
138,002       
125,475       
28,916       
3,337       
64,789       
517       
361,036     $

13,643     $
9,993       
2,626       
-       
-       
26,262       
4,240       
-       
2,889       
33,391       

43,329   
30,706   

24,226   
6,194   
3,406   
-  
107,861   
91,626   
28,916   
4,083   
54,318   
227   
287,031   

7,882   
6,067   
2,718   
1,953   
139   
18,759   
1,363   
10   
1,360   
21,492   

 -       

 -

26       
198,835       
133,996       
(5,212 )     
327,645       
361,036     $

26   
180,960   
87,482   
(2,929) 
265,539   
287,031   

The accompanying notes are an integral part of these consolidated financial statements. 

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Proto Labs, Inc. 
Consolidated Statements of Comprehensive Income 
(In thousands, except share and per share amounts) 

Year Ended December 31, 
2014 

2015 

2013 

Statements of Operations: 
Revenue ..............................................................................................   $ 
Cost of revenue ..................................................................................     
Gross profit ........................................................................................     
Operating expenses ............................................................................       
Marketing and sales ........................................................................     
Research and development .............................................................     
General and administrative .............................................................     
Total operating expenses .............................................................     
Income from operations .....................................................................     
Other income, net ...............................................................................     
Income before income taxes ...............................................................     
Provision for income taxes .................................................................     
Net income .........................................................................................   $ 

264,106     $
109,703       
154,403       

209,583     $
81,182       
128,401       

163,112   
61,410   
101,702   

39,188       
18,350       
29,716       
87,254       
67,149       
712       
67,861       
21,347       
46,514     $

29,144       
16,607       
22,122       
67,873       
60,528       
3       
60,531       
18,896       
41,635     $

22,386   
11,863   
16,154   
50,403   
51,299   
279   
51,578   
16,301   
35,277   

Net income per share: 

Basic ...............................................................................................   $ 
Diluted ............................................................................................   $ 

1.79     $
1.77     $

1.62     $
1.60     $

1.40   
1.36   

Shares used to compute net income per share: 

Basic ...............................................................................................     
Diluted ............................................................................................     

26,005,858       
26,320,284       

25,692,699       
26,100,320       

25,198,556   
25,859,741   

Other Comprehensive Loss, net of tax 
Foreign currency translation adjustments ...........................................   $ 
Comprehensive income ......................................................................   $ 

(2,283)   $
44,231     $

(1,838 )   $
39,797     $

(163 ) 
35,114   

The accompanying notes are an integral part of these consolidated financial statements. 

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Proto Labs, Inc. 
Consolidated Statements of Shareholders' Equity 
(In thousands, except share and per share amounts) 

Common Stock 

Shares 

Amount 

Additional 
Paid-In 
Capital 

Retained 
Earnings 

Accumulated 
Other  
Comprehensive
Loss 

Total 

Balance at January 1, 2013 ........     24,803,640      

25      

147,032      

10,570       

(928)     

156,699   

Common shares issued on 

exercise of options and other .     

742,467      

1      

6,495       

-      

-      

-      

9,873       

-      
-      

3,461       
-      

-      
35,277       

-      

-      

-      

-      

) 

(163

-      

6,496   

-      

9,873   

-      
-      

3,461   
35,277   

) 

(163
35,114   
211,643   

4,809   
41,635   

) 

(1,838
39,797   
265,539   

6,082   
46,514   

) 

(2,283
44,231   
327,645   

Excess tax benefit from stock 

option exercises .....................     

Stock-based compensation 

expense ..................................     
Net income ................................     
Other comprehensive income 

Foreign currency translation 

adjustment .........................     
Comprehensive income ............     

Excess tax benefit from stock 

option exercises .....................     

Stock-based compensation 

expense ..................................     
Net income ................................     
Other comprehensive income 

Foreign currency translation 

adjustment .........................     
Comprehensive income ............     

Excess tax benefit from stock 

option exercises .....................     

Stock-based compensation 

expense ..................................     
Net income ................................     
Other comprehensive income 

Foreign currency translation 

adjustment .........................     
Comprehensive income ............     

-      

-      
-      

-      

-      
-      

-      

-      
-      

Balance at December 31, 2013 ...     25,546,107      

26      

166,861      

45,847       

(1,091)     

Common shares issued on 

exercise of options and other .     

292,003      

-      

4,820       

-      

4,470       

-      

-      

-      

4,820   

-      

4,470   

-      
-      

4,809       
-      

-      
41,635       

-      
-      

) 

-      

-      

-      

-      

(1,838

Balance at December 31, 2014 ...     25,838,110    $ 

26    $  180,960    $ 

87,482     $ 

(2,929)   $

Common shares issued on 

exercise of options and other .     

362,608      

-      

6,254       

-      

5,539       

-      

-      

-      

6,254   

-      

5,539   

-      
-      

6,082       
-      

-      
46,514       

-      
-      

) 

-      

-      

-      

-      

(2,283

Balance at December 31, 2015 ...     26,200,718    $ 

26    $  198,835    $  133,996     $ 

(5,212)   $

The accompanying notes are an integral part of these consolidated financial statements. 

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Proto Labs, Inc. 
Consolidated Statements of Cash Flows 
(In thousands) 

Operating activities 

Net income ......................................................................................   $ 
Adjustments to reconcile net income to net cash provided by 

operating activities: 
Depreciation and amortization ....................................................     
Stock-based compensation expense ............................................     
Deferred taxes .............................................................................     
Excess tax benefit from stock-based compensation ....................     
Loss on disposal of property and equipment ...............................     
Gain on acquisition .....................................................................     
Amortization of held-to-maturity securities ................................     
Changes in operating assets and liabilities, net of acquisitions:        
Accounts receivable .................................................................     
Inventories ...............................................................................     
Prepaid expenses and other......................................................     
Income taxes ............................................................................     
Accounts payable ....................................................................     
Accrued liabilities and other ....................................................     
Net cash provided by operating activities .......................................     

Investing activities 

Purchases of property and equipment .............................................     
Cash used for acquisitions, net of cash acquired ............................     
Purchases of marketable securities .................................................     
Proceeds from maturities of marketable securities .........................     
Net cash used in investing activities ...............................................     

Financing activities 

Payments on debt ............................................................................     
Acquisition-related contingent consideration .................................     
Proceeds from exercises of stock options and other .......................     
Excess tax benefit from stock-based compensation ........................     
Net cash provided by financing activities .......................................     
Effect of exchange rate changes on cash and cash equivalents ..........     
Net increase in cash and cash equivalents ......................................     
Cash and cash equivalents, beginning of period ............................     
Cash and cash equivalents, end of period ......................................   $ 

Year Ended December 31, 
2014 

2015 

2013 

46,514     $

41,635     $

35,277   

14,126       
6,082       
2,837       
(5,539)     
-      
(344)     
1,234       

(11,371)     
(2,097)     
(2,047)     
(2,310)     
5,781       
5,691       
58,557       

(44,362)     
(5,032)     
(66,393)     
52,193       
(63,594)     

(152)     
(1,400)     
6,251       
5,539       
10,238       
(877)     
4,324       
43,329       
47,653     $

11,138       
4,809       
(1,875 )     
(4,470 )     
-       
-       
1,517       

(5,304 )     
(896 )     
107       
9,373       
1,435       
(259 )     
57,210       

7,569   
3,461   
467   
(9,873 ) 
110   
-   
1,468   

(2,470 ) 
(579 ) 
1,630   
8,845   
1,651   
885   
48,441   

(43,507 )     
(33,864 )     
(60,186 )     
74,058       
(63,499 )     

(18,753 ) 
-   
(106,298 ) 
66,570   
(58,481 ) 

(1,054 )     
(1,200 )     
4,820       
4,470       
7,036       
(457 )     
290       
43,039       
43,329     $

(258 ) 
-   
6,496   
9,873   
16,111   
209   
6,280   
36,759   
43,039   

Supplemental cash flow disclosure 

Cash paid for interest ......................................................................   $ 
Cash paid for taxes .........................................................................   $ 

5     $
20,330     $

19     $
11,549     $

35   
6,593   

The accompanying notes are an integral part of these consolidated financial statements. 

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Note 1 — Nature of Business 

Organization and business 

Proto Labs, Inc. and its subsidiaries (Proto Labs, the Company, we, us, or our) is an online and technology-enabled 
manufacturer  of  quick-turn,  on-demand  3D-printed,  computer  numerical  control  (CNC)  machined  and  injection-molded 
custom  parts  for  prototyping  and  short-run  production.  The  Company’s  customers  are  product  developers  and  engineers 
throughout the world who require a faster and less expensive way to obtain low volumes of parts. The Company’s proprietary 
technology  eliminates  most  of  the  time-consuming  and  expensive  skilled  labor  conventionally  required  to  quote  and 
manufacture parts in low volumes, and its customers conduct nearly all of their business with the Company over the Internet. 
The  Company  targets  its  product  lines  to  the  millions  of  product  developers  and  engineers  who  use  three-dimensional 
(3D) computer-aided design (CAD) software to design products across a diverse range of end-markets. The Company has 
established operations in the United States, Europe and Japan, which the Company believes are among the largest geographic 
markets where these product developers and engineers are located. The Company’s primary manufacturing product lines 
currently include 3D Printing (Fineline), CNC Machining (Firstcut) and Injection Molding (Protomold). Proto Labs, Inc. is 
located in Maple Plain, Minnesota. The Company’s subsidiaries are: 

Name 

PL-US International LLC .................................................................................................................. 
Proto Labs Ltd. .................................................................................................................................. 
PL Euro Services Ltd. ....................................................................................................................... 
PL International UK LLP .................................................................................................................. 
PL International Holding UK Ltd. .................................................................................................... 
PLJ Ltd. ............................................................................................................................................. 
Alphaform Ltd. ................................................................................................................................. 
PL DE Holding GmbH ...................................................................................................................... 
Proto Labs GmbH ............................................................................................................................. 
Proto Labs Eschenlohe GmbH .......................................................................................................... 
Alphaform RPI Oy ............................................................................................................................ 
Alphaform Sweden AB ..................................................................................................................... 
Proto Labs, G.K. ............................................................................................................................... 

Location 

United States 
United Kingdom 
United Kingdom 
United Kingdom 
United Kingdom 
United Kingdom  
United Kingdom  
Germany  
Germany  
Germany  
Finland  
Sweden  
Japan 

Note 2 — Summary of Significant Accounting Policies 

Principles of consolidation 

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, as listed 
within  organization  and  business  above.  All  significant  intercompany  accounts  and  transactions  have  been  eliminated  in 
consolidation. 

Comprehensive income 

Components  of  comprehensive  income  include  net  income  and  foreign  currency  translation  adjustments. 
Comprehensive income is disclosed in the accompanying consolidated statements of comprehensive income and consolidated 
statements of shareholders’ equity. 

Accounting estimates 

The preparation of financial statements in conformity with accounting principles generally accepted in the United States 
of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets 
and liabilities and related disclosures at the date of the financial statements and the reported amounts of revenues and expenses 
during the reporting period. Actual results could differ from those estimates. 

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Cash and cash equivalents 

Cash and cash equivalents include cash and other investments, including marketable securities, with maturities of three 
months or less at the date of purchase. The Company maintains its cash in bank deposit accounts, which, at times, may exceed 
federally insured limits. The Company has not experienced any losses on such accounts. 

Marketable securities 

Marketable securities include held-to-maturity debt securities recorded at amortized cost. Management determines the 
appropriate classification of debt securities at the time of purchase and reevaluates such designation as of each balance sheet 
date.  Debt  securities  are  classified  as  held-to-maturity  when  the  Company  has  the  positive  intent  and  ability  to  hold  the 
securities to maturity. Held-to-maturity securities are stated at amortized cost, adjusted for amortization of premiums and 
accretion  of  discounts  to  maturity  computed  under  the  effective  interest  method.  Such  amortization  is  included  in  other 
income,  net.  Interest  on  securities  classified  as  held  to  maturity  is  included  in  other  income,  net.  The  classification  of 
marketable securities as current or non-current is dependent upon the security’s maturity date. Securities with maturities of 
three months or less at the time of purchase are categorized as cash equivalents as described above. The Company reviews 
impairments associated with its marketable securities in accordance with the measurement guidance provided by Accounting 
Standards  Codification  (ASC)  320,  Investments  –  Debt  and  Equity  Securities,  when  determining  the  classification  of 
impairment as “temporary” or “other-than-temporary.” The factors used to differentiate between temporary and other-than-
temporary include assessment of the quality of the security, credit ratings actions and management’s intent to hold the security 
to maturity as well as other factors. 

Accounts receivable and allowance for doubtful accounts 

Accounts receivable are reported at the invoiced amount less an allowance for doubtful accounts. On a periodic basis, 
the Company evaluates its accounts receivable and establishes an allowance for doubtful accounts based on a combination 
of  specific  customer  circumstances  and  credit  conditions  taking  into  account  the  history  of  write-offs  and  collections.  A 
receivable is considered past due if payment has not been received within the period agreed upon in the invoice. Accounts 
receivable are written off after all collection efforts have been exhausted. Recoveries of trade receivables previously written 
off are recorded when received. 

Inventory 

Inventory consists primarily of raw materials, which are recorded at the lower of cost or market, using the average-cost 
method, which approximates first-in, first-out (FIFO) cost. The Company periodically reviews its inventory for slow-moving, 
damaged and discontinued items and provides allowances to reduce such items identified to their recoverable amounts. 

Property, equipment and leasehold improvements 

Property, equipment and leasehold improvements are stated at cost. Major improvements that substantially extend an 
asset’s  useful  life  are  capitalized.  Repairs,  maintenance  and  minor  improvements  are  charged  to  operations  as  incurred. 
Depreciation, including amortization of leasehold improvements and assets recorded under capital leases, is calculated using 
the straight-line method over the estimated useful lives of the individual assets and ranges from 3 to 39 years. Manufacturing 
equipment  is  depreciated  over  3  to 15  years,  office furniture  and  equipment  are  depreciated  over 3  to 7  years,  computer 
hardware and software are depreciated over 3 to 5 years, building costs are depreciated over 39 years, leasehold improvements 
are depreciated over the estimated lives of the related assets or the life of the lease, whichever is shorter, and building and 
land improvements are depreciated over 10 to 39 years. Assets not in service are not depreciated until the related asset is put 
into use. 

In August 2015, the Company adjusted the useful lives of its primary production equipment based on experience and 
condition of current equipment. This change in accounting estimate  is  accounted for prospectively, and therefore had no 
effect on property and equipment, net as previously reported. This change was not material. 

Goodwill 

The Company recognizes goodwill in accordance with ASC 350, Intangibles—Goodwill and Other. Goodwill is the 
excess  of  cost  of  an  acquired  entity  over  the  amounts  assigned  to  assets  acquired  and  liabilities  assumed  in  a  business 
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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

combination. Goodwill is not amortized. Goodwill is tested for impairment annually in the fourth quarter of each year, and 
is tested for impairment between annual tests if an event occurs or circumstances change that would indicate the carrying 
amount may be impaired. An impairment charge for goodwill is recognized only when the estimated fair value of a reporting 
unit, including goodwill, is less than its carrying amount. 

Other Intangible Assets 

Other  intangible  assets  include  internally  developed  software,  customer  relationships  and  other  intangible  assets 
acquired from an independent party. Other intangible assets with a definite life are amortized over a period ranging from two 
to 10 years on a straight line basis. Other intangible assets with a definite life are tested for impairment whenever events or 
circumstances indicate that the carrying amount of an asset (asset group) may not be recoverable. An impairment loss is 
recognized when the carrying amount of an asset exceeds the estimated undiscounted cash flows used in determining the fair 
value of the asset. The amount of the impairment loss recorded is calculated by the excess of the asset’s carrying value over 
its fair value. 

Accounting for long-lived assets 

The  Company  periodically  reviews  the  carrying  amount  of  its  property,  equipment  and  leasehold  improvements  to 
determine  if  circumstances  exist  indicating  an  impairment  or  if  depreciation  periods  should  be  modified.  If  facts  or 
circumstances support the possibility of impairment, the Company will prepare a projection of the undiscounted future cash 
flows of the specific assets to determine if the assets are recoverable. If impairment exists based on these projections, an 
adjustment will be made to reduce the carrying amount of the specific assets to fair value. 

Revenue recognition 

The Company recognizes revenue when it is realized or realizable and earned when all of the following criteria are met: 
persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the price to the buyer is 
fixed or determinable and collectability is reasonably assured. Revenue is recognized upon transfer of title and risk of loss, 
which is generally upon the shipment of parts in our 3D Printing (Fineline), CNC Machining (Firstcut) and Injection Molding 
(Protomold) product lines. Freight billed to customers is included in revenues, and all freight expenses paid by the Company 
are included in cost of revenue.  

Income taxes 

The Company accounts for income taxes in accordance with ASC 740, Income Taxes (ASC 740). Under this method, 
the  Company  determines  tax  assets  and  liabilities  based  upon  the  differences  between  the  financial  statement  carrying 
amounts and the tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are 
expected to affect taxable income. The tax consequences of most events recognized in the current year’s financial statements 
are included in determining income taxes currently payable. However, because tax laws and financial accounting standards 
differ in their recognition and measurement of assets, liabilities and equity, revenues, expenses, gains and losses, differences 
arise between the amount of taxable income and pretax financial income for a year and between the tax basis of assets or 
liabilities and their reported amounts in the financial statements. Because the Company assumes that the reported amounts of 
assets and liabilities will be recovered and settled, respectively, a difference between the tax basis of an asset or liability and 
its reported amount in the balance sheet will result in a taxable or a deductible amount in some future years when the related 
liabilities are settled or the reported amounts of the assets are recovered, giving rise to a deferred tax asset or liability. The 
Company establishes a valuation allowance for any portion of its deferred tax assets that the Company believes will not be 
recognized. 

ASC 740 also clarifies the accounting for uncertainty in income taxes recognized in an enterprise’s financial statements 
by requiring that individual tax positions are recorded only when they meet a more-likely-than-not criterion. Additionally, 
ASC  740  provides  guidance  on  measurement,  de-recognition,  classification,  interest  and  penalties,  accounting  in  interim 
periods, disclosure and transition. 

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Stock-based compensation 

The  Company  accounts  for  stock-based  compensation  in  accordance  with  ASC  718,  Compensation—Stock 
Compensation  (ASC  718).  Under  the  fair  value  recognition  provisions  of  ASC  718,  the  Company  measures  stock-based 
compensation cost at the grant date fair value and recognizes the compensation expense over the requisite service period, 
which  is  the  vesting  period,  using  a  straight-line  attribution  method.  The  amount  of  stock-based  compensation  expense 
recognized during a period is based on the portion of the awards that are ultimately expected to vest. The Company estimates 
pre-vesting award forfeitures at the time of grant by analyzing historical data and revises those estimates in subsequent periods 
if actual forfeitures differ from those estimates. Ultimately, the total expense recognized over the vesting period will only be 
for  those  awards  that vest.  The  Company’s  awards  are  not  eligible  to vest  early  in  the event  of  retirement,  however,  the 
awards vest early in the event of a change in control. 

In determining the compensation cost of the options granted, the fair value of options granted has been estimated on the 

date of grant using the Black-Scholes option-pricing model. 

Advertising costs 

Advertising is expensed as incurred and was approximately $10.0 million, $8.5 million and $6.8 million for the years 

ended December 31, 2015, 2014 and 2013, respectively. 

Research and development 

Research and development expenses consist primarily of personnel and outside service costs related to the development 
of  new  processes  and  product  lines,  enhancement  of  existing  product  lines,  quality  assurance  and  testing.  The  Company 
follows ASC 350-40, Internal-Use Software, in accounting for internally developed software. As of December 31, 2015, 
2014 and 2013, all internal use software projects were in the post-implementation/operation stage and therefore, no software 
development costs were capitalized. Research and development costs were approximately $18.4 million, $16.6 million and 
$11.9 million for the years ended December 31, 2015, 2014 and 2013, respectively. 

Foreign currency translation/transactions 

The  Company  translated  the  balance  sheets  of  its  foreign  subsidiaries  at  period-end  exchange rates and  the  income 
statement at the average exchange rates in effect throughout the period. The Company has recorded the translation adjustment 
as a separate component of consolidated shareholders’ equity. Foreign currency transaction gains and losses are recognized 
in the consolidated statements of comprehensive income. 

Recent accounting pronouncements 

         In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standard Update (ASU) No. 2014-
09, Revenue from Contracts with Customers. This ASU is a comprehensive new revenue recognition model that requires a 
company to recognize revenue from the transfer of goods or services to customers in an amount that reflects the consideration 
that  the  entity  expects  to  receive  in  exchange  for  those  goods  or  services.  The  Company  is  required  to  adopt  the  new 
pronouncement using one of two retrospective application methods.  

         On July 9, 2015, the FASB voted to approve a deferral of the effective date of ASU 2014-09 by one year to December 
15, 2017 for annual reporting periods beginning after that date. The Company is evaluating the application method and the 
impact of this new standard on our financial statements, but does not expect the impact to be material. 

In April 2015, the FASB issued ASU No. 2015-05, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 
350-40): Customer's Accounting for Fees Paid in a Cloud Computing Arrangement. Under this standard, if a cloud computing 
arrangement includes a software license, the software license element of the arrangement should be accounted for consistent 
with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the 
arrangement should be accounted for as a service contract. The Company is required to adopt the new standard on January 
1, 2016. The adoption of this standard is not expected to have a material impact on the Company’s financial position or results 
of operations. 

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

In July 2015, the FASB issued ASU No. 2015-11, Inventory (Topic 330): Simplifying the Measurement of Inventory. 
The new standard applies only to inventory for which cost is determined by methods other than last-in, first-out and the retail 
inventory method, which includes inventory that is measured using first-in, first-out or average cost. Inventory within the 
scope of this standard is required to be measured at the lower of cost and net realizable value. Net realizable value is the 
estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and 
transportation. The Company is required to adopt the new standard on January 1, 2017. The adoption of this standard is not 
expected to have an impact on the Company’s financial position or results of operations. 

In  September  2015,  the  FASB  issued  ASU  No.  2015-16,  Business  Combinations  (Topic  805):  Simplifying  the 
Accounting for Measurement-Period Adjustments (ASU 2015-16). ASU 2015-16 eliminates the requirement to restate prior 
period financial statements for measurement period adjustments. The new guidance requires that the cumulative impact of a 
measurement period adjustment (including the impact on prior periods) be recognized in the reporting period in which the 
adjustment is identified. In addition, separate presentation on the face of the income statement or disclosure in the notes is 
required regarding the portion of the adjustment recorded in the current period earnings, by line item, that would have been 
recorded in previous reporting periods if the adjustment to the provisional amounts had been recognized as of the acquisition 
date. ASU 2015-16 is to be applied prospectively for measurement period adjustments that occur after the effective date. 
ASU 2015-16 is effective for annual reporting periods, including interim reporting periods within those periods, beginning 
after December 15, 2015, and early adoption is permitted. The Company elected to early adopt this standard as of December 
31, 2015. Since it is prospective, the impact of ASU 2015-16 on the Company's financial condition and earnings will depend 
upon the nature of any measurement period adjustments identified in future periods. 

On  November  20, 2015,  the FASB  issued ASU No. 2015-17,  Balance Sheet  Classification  of  Deferred Taxes.  The 
standard  amends  the  current  requirement  for  organizations  to  present  deferred  tax  assets  and  liabilities  as  current  and 
noncurrent in a classified balance sheet. Instead, organizations will now be required to classify all deferred tax assets and 
liabilities  as  noncurrent.  The  ASU  is  effective  for  fiscal  years,  and  interim  periods  within  those  years,  beginning  after 
December 15, 2016, with early adoption permitted. The Company early adopted this standard during fourth quarter 2015, 
utilizing retrospective application as permitted. As such, certain prior period amounts have been reclassified to conform to 
the current presentation. In the Consolidated Balance Sheet as of December 31, 2014, the Company reclassified $0.5 million 
from current deferred income tax assets to reduce deferred income taxes within non-current liabilities.  

Note 3 – Net Income Per Common Share 

Basic net income per share is computed based on the weighted average number of common shares outstanding. Diluted 
net income per share is computed based on the weighted average number of common shares outstanding, increased by the 
number of additional shares that would have been outstanding had the potentially dilutive common shares been issued and 
reduced by the number of shares the Company could have repurchased from the proceeds from issuance of the potentially 
dilutive shares. Potentially dilutive shares of common stock include stock options and other stock-based awards granted under 
stock-based compensation plans and shares committed to be purchased under the employee stock purchase plan. 

The  following  table  presents  the  calculation  of  net  income  per  basic  and  diluted  share  attributable  to  common 

shareholders: 

(in thousands, except share and per share amounts) 

Year Ended December 31, 
2014 

2013 

2015 

Net Income .........................................................................................   $ 

46,514     $ 

41,635     $ 

35,277   

Basic - weighted-average shares outstanding: ....................................     
Effect of dilutive securities: 

Employee stock options and other ..................................................     
Diluted - weighted-average shares outstanding: .................................     
Net income per share attributable to common shareholders: 

Basic ...............................................................................................   $ 
Diluted ............................................................................................   $ 

26,005,858       

25,692,699       

25,198,556   

314,426       
26,320,284       

407,621       
26,100,320       

661,185   
25,859,741   

1.79     $ 
1.77     $ 

1.62     $ 
1.60     $ 

1.40   
1.36   

58 

 
 
  
  
   
  
  
  
  
  
  
    
    
  
  
      
        
        
  
  
      
        
        
  
      
        
        
  
      
        
        
  
  
Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Note 4 – Business Combinations 

On October 1, 2015, the Company acquired certain assets, including shares of select subsidiaries, of Alphaform AG 
(Alphaform) through insolvency proceedings administered through the Insolvency Court of Munich, Germany. Included in 
the  acquisition  were  select  assets  of  Alphaform  AG  and  Alphaform  Claho  GmbH  and  shares  of  Alphaform  RPI  Oy  and 
Alphaform  Ltd.,  for  $5.0  million  net  cash  consideration,  which  was  funded  with  cash  available  in  the  United  States  and 
Europe. The operations of Alphaform will be integrated into the operations of the Company.  

Alphaform  is  a  leading  service  bureau  headquartered  in  Feldkirchen  (Munich),  Germany  and  also  has  locations  in 
Eschenlohe, Germany; Rusko, Finland and Reading, UK. Alphaform produces high-quality parts using stereolithography 
(SL),  selective  laser  sintering  (SLS)  and  direct  metal  laser  sintering  (DMLS)  technologies  as  well  as  injection  molding 
capabilities  and  other  production  processes.  The  revenue  associated  with  these  processes  will  be  reported  under  the  3D 
Printing, Injection Molding and Other product lines. 

The  results  of  Alphaform  since  the  date  of  acquisition  and  pro  forma  disclosures  of  the  consolidated  results  of  the 
Company  with  the  full  year effects of  Alphaform  have  not  been  separately  presented since  the  impact  to  the  Company's 
results of operations was not material. 

The  acquisition  has  been  accounted  for  under  the  acquisition  method  of  accounting  in  accordance  with  ASC  805. 
Because Alphaform was insolvent, the fair value of the assets purchased and liabilities assumed exceeded the fair value of 
consideration paid, which resulted in a bargain purchase gain of $0.3 million. The bargain purchase gain has been recorded 
in Other Income, Net in the Consolidated Statement of Comprehensive Income for the year ended December 31, 2015. As of 
December 31, 2015, this allocation for Alphaform is final as it relates to the valuation of certain working capital accounts, 
intangible assets and taxes. The final allocation of the purchase price to assets acquired and liabilities assumed is as follows: 

(in thousands) 
Assets acquired: 
Current assets ................................................................................................................................................   $ 
Other long-term assets ...................................................................................................................................     
Total assets acquired ..................................................................................................................................     

Liabilities assumed: 
Current liabilities ...........................................................................................................................................     
Total liabilities assumed ............................................................................................................................     
Net assets acquired ....................................................................................................................................   $ 

Cash paid .......................................................................................................................................................   $ 
Cash acquired ................................................................................................................................................     
Total purchase consideration .....................................................................................................................   $ 
Gain recognized on bargain purchase ...........................................................................................................   $ 

2,766   
3,876   
6,642   

1,266   
1,266   
5,376   

5,570   
(538) 
5,032   
344   

On April 23, 2014, the Company acquired 100% of the outstanding shares of FineLine Prototyping, Inc. (FineLine) for 
$33.9 million net cash consideration, which was funded with cash available in the United States and the sale of $15.5 million 
of held-to-maturity securities. The shares of FineLine acquired through the Stock Purchase Agreement (the Agreement) were 
purchased in a private transaction exempt from registration under the Securities Act of 1933 and the operations of FineLine 
will be integrated into the operations of the Company. Under the terms of the Agreement, the Company is obligated to make 
additional cash payments totaling up to $3.0 million, contingent upon both the achievement of 2014 revenue goals and certain 
milestones relating to the integration of FineLine’s operations with the Company. As of December 31, 2015, the Company 
had made payments of $2.6 million related to the attainment of milestones and as of December 31, 2015, the contingent 
consideration  balance  totaled  $0.4  million,  which  is  classified  under  Accrued  Liabilities  and  Other  on  the  Consolidated 
Balance Sheet.  

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

FineLine  is  based  in  Raleigh,  North  Carolina  and  is  a  leading  producer  of  parts  using  additive  manufacturing 
technologies, often times referred to as 3D printing. FineLine produces high-quality parts using stereolithography (SLA), 
selective  laser  sintering  (SLS)  and  direct  metal  laser  sintering  (DMLS)  technologies  to  customers  in  a  wide  variety  of 
industries, including medical, aerospace, computer/electronics, consumer products and industrial machinery, among others.  

Consistent with the provisions of ASC 805, Business Combinations (ASC 805), the Company accrued the contingent 
payment  on  the  date  of  acquisition  after  determining  its  fair  value  of  $3.0  million  in  arriving  at  $36.9  million  of  total 
consideration, net of cash acquired. The fair value of the contingent consideration was determined by using Level 3 inputs 
based  on  the  present  value  of  various  payout  scenarios,  weighted  on  the  basis  of  probability.  The  contingent  payment 
continues to be remeasured to fair value at each reporting period with changes in fair value reflected in the Consolidated 
Statements of Comprehensive Income.  

The fair value of the consideration paid for this acquisition was allocated to the assets purchased and liabilities assumed 
based on their estimated fair values as of the acquisition date, with any excess recorded as goodwill. The goodwill associated 
with the acquisition is deductible for tax purposes and represents the strategic and growth opportunities from strengthening 
the Company’s portfolio of rapid prototyping product offerings. The addition of additive manufacturing expands Proto Labs’ 
products to address a wider spectrum of needs for the product developer and engineer. From concept models, to form and fit 
testing, to functional testing and short-run production, the acquisition of FineLine allows the Company to offer a broader 
range of quick-turn, on-demand custom parts with speed, reliability and consistency. 

The  results  of  FineLine  since  the  date  of  acquisition  and  pro  forma  disclosures  of  the  consolidated  results  of  the 
Company with the full year effects of FineLine have not been separately presented since the impact to the Company's results 
of operations was not material. 

60 

 
 
  
  
  
  
  
  
 
 
Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

The FineLine acquisition was accounted for under the acquisition method of accounting in accordance with ASC 805. 

The final allocation of the purchase price to assets acquired and liabilities assumed is as follows: 

(in thousands) 
Assets acquired: 
Current assets ................................................................................................................................................   $ 
Intangible assets ............................................................................................................................................     
Goodwill .......................................................................................................................................................     
Other long-term assets ...................................................................................................................................     
Total assets acquired ..................................................................................................................................     

Liabilities assumed: 
Current liabilities ...........................................................................................................................................     
Total liabilities assumed ............................................................................................................................     
Net assets acquired ....................................................................................................................................     

Cash paid .......................................................................................................................................................     
Cash acquired ................................................................................................................................................     
Net cash consideration ...............................................................................................................................     
Contingent consideration ..............................................................................................................................     
Total purchase consideration .....................................................................................................................   $ 

1,248   
4,580   
28,916   
3,849   
38,593   

1,729   
1,729   
36,864   

34,468   
(604) 
33,864   
3,000   
36,864   

Note 5 – Goodwill and Other Intangible Assets 

The changes in the carrying amount of goodwill for the year ended December 31, 2015 and 2014 were as follows: 

(in thousands) 

December 31,  

2015 

2014 

Balance as of the beginning of the period ....................................................................   $ 
Goodwill acquired during the period ...........................................................................     
Balance as of the end of the period ..............................................................................   $ 

28,916     $ 
-      
28,916     $ 

-  
28,916  
28,916   

Intangible assets other than goodwill for the years ended December 31, 2015 and 2014 were as follows: 

Year Ended December 31, 2015 

Year Ended December 31, 2014 

(in thousands) 
Intangible Assets with 

Gross 

   Accumulated  
Amortization 

Net 

Gross 

   Accumulated  
Amortization 

Net 

   Useful Life  
(in years) 

   Weighted  

Average Useful 
Life Remaining 
(in years) 

finite lives: 
Marketing assets .....   $ 
Non-compete 

agreement .............     
Trade secrets ...........     
Internally developed 

930   

  $ 

(155)    $ 

775   

  $ 

930  

  $ 

(62)    $ 

868   

     10.0  

     8.3  

190   
250   

(158)      
(83)      

32   
167   

190  
250  

680  

(63)    $ 
(33)    $ 

127   
217   

(151)    $ 

529   

software ................     

680   

(378)      

302   

Customer 

relationships .........     

2,530   
Total intangible assets .   $  4,580   

  $ 

(469)      

2,061  
(1,243)    $  3,337  

2,530  
  $  4,580  

  $ 

(188)    $  2,342   
(497)    $  4,083   

2.0  
5.0  

3.0  

9.0  

     0.3  
     3.3  

     1.3  

     7.3  

Amortization expense for intangible assets was $0.7 million and $0.5 million for the years ended December 31, 2015 

and 2014, respectively. 

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Estimated aggregated amortization expense based on the current carrying value of the amortizable intangible assets is 

as follows: 

(in thousands) 
2016 ...............................................................................................................................................................   $ 
2017 ...............................................................................................................................................................     
2018 ...............................................................................................................................................................     
2019 ...............................................................................................................................................................     
2020 ...............................................................................................................................................................     
Thereafter ......................................................................................................................................................     
Total estimated amortization expense ...........................................................................................................   $ 

Estimated 
Amortization 
Expense 

682   
500   
424   
391   
374   
966   
3,337   

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Note 6 – Fair Value Measurements 

ASC 820, Fair Value Measurement (ASC 820), defines fair value as the exchange price that would be received for an 
asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an 
orderly transaction between market participants on the measurement date. ASC 820 also establishes a fair value hierarchy 
which requires classification based on observable and unobservable inputs when measuring fair value. There are three levels 
of inputs that may be used to measure fair value: 

Level 1—Quoted prices in active markets for identical assets or liabilities. 

Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted 
prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market 
data for substantially the full term of the assets or liabilities. 

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair 
value of the assets or liabilities. 

The Company’s cash equivalents measured at fair value as of December 31, 2015 and 2014, respectively, consist of 

money market mutual funds. The Company determines the fair value of these financial assets using Level I inputs. 

A summary of financial assets measured at fair value on a recurring basis is as follows: 

(in thousands)  

   Level 1 

     Level 2 

     Level 3 

     Level 1 

     Level 2 

     Level 3 

December 31, 2015 

December 31, 2014 

Financial Assets: 
Cash and cash equivalents 

Money market mutual fund .......   $ 
Total ...........................................   $ 

11,896     $ 
11,896     $ 

-    $ 
-    $ 

-    $ 
-    $ 

6,129     $ 
6,129     $ 

-     $ 
-     $ 

-  
-  

Note 7 – Marketable Securities 

The  Company  invests  in  short-term  and  long-term  agency,  municipal,  corporate,  commercial  paper  and  other  debt 
securities. The securities are categorized as held-to-maturity and are recorded at amortized cost. Categorization as held-to-
maturity  is  based  on  the  Company’s  ability  and  intent  to  hold  these  securities  to  maturity.  Information  regarding  the 
Company’s short-term and long-term marketable securities as of December 31, 2015 and 2014 is as follows: 

(in thousands) 

December 31, 2015 

Amortized 
Cost 

Unrealized 
Gains 

Unrealized 
Losses 

Fair Value 

U.S. government agency securities ..............................................    $ 
Corporate debt securities ..............................................................      
Commercial paper ........................................................................      
U.S. municipal securities ..............................................................      
Certificates of deposit/time deposits ............................................      
Total marketable securities ...........................................................    $ 

26,784     $ 
28,133       
1,497       
35,667       
5,909       
97,990     $ 

2     $ 
-      
-      
8       
2       
12     $ 

(99)   $ 
(114)     
(2)     
(56)     
(11)     
(282)   $ 

26,687   
28,019   
1,495   
35,619   
5,900   
97,720   

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

(in thousands) 

December 31, 2014 

Amortized 
Cost 

Unrealized 
Gains 

Unrealized 
Losses 

Fair Value 

U.S. government agency securities ..............................................    $ 
Corporate debt securities ..............................................................      
U.S. municipal securities ..............................................................      
Certificates of deposit/time deposits ............................................      
Total marketable securities ...........................................................    $ 

20,048     $ 
29,316       
30,004       
5,656       
85,024     $ 

-    $ 
7       
32       
5       
44     $ 

(71)   $ 
(79)     
(18)     
(15)     
(183)   $ 

19,977   
29,244   
30,018   
5,646   
84,885   

Fair values for the corporate debt securities are primarily determined based on quoted market prices (Level 1). Fair 
values  for  the  U.S.  municipal  securities,  U.S.  government  agency  securities  and  certificates  of  deposit  are  primarily 
determined using dealer quotes or quoted market prices for similar securities (Level 2). 

The  Company  tests  for  other  than  temporary  losses  on  a  quarterly  basis  and  has  considered  the  unrealized  losses 
indicated above to be temporary in nature. The investment policy adopted by the Company dictates that only investments in 
quality, highly rated debt securities are permitted. Those unrealized losses displayed above are the result of macroeconomic 
factors and are indicative of neither the quality of the underlying security nor the issuer’s ability to pay its debt. The Company 
intends, and has the ability, to hold the investments to maturity and recover the full principal. 

Classification of marketable securities as current or non-current is based upon the security’s maturity date as of the date 

of these financial statements. 

The December 31, 2015 balance of held-to-maturity debt securities by contractual maturity is shown in the following 
table at amortized cost. Actual maturities may differ from contractual maturities because the issuers of the securities may 
have the right to prepay obligations without prepayment penalties. 

(in thousands) 

   December 31,    
2015 

Due in one year or less ................................................................................................................................   $ 
Due after one year through five years .........................................................................................................     
Total marketable securities ..........................................................................................................................   $ 

33,201   
64,789   
97,990   

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Note 8 – Property and Equipment 

Property and equipment consists of the following: 

(in thousands) 

December 31,  

2015 

2014 

Land .............................................................................................................................   $ 
Buildings and improvements ........................................................................................     
Machinery and equipment ............................................................................................     
Computer hardware and software .................................................................................     
Leasehold improvements ..............................................................................................     
Construction in progress...............................................................................................     
Capital leases - machinery and equipment ...................................................................     
Total .............................................................................................................................     
Accumulated depreciation and amortization ................................................................     
Property and equipment, net .........................................................................................   $ 

8,301     $ 
37,297       
103,205       
13,273       
3,404       
6,712       
-      
172,192       
(46,717)     
125,475     $ 

6,825   
29,995   
72,891   
10,738   
3,501   
4,004   
1,167   
129,121   
(37,495) 
91,626   

Depreciation expense for the years ended December 31, 2015, 2014 and 2013 was $13.4 million, $10.6 million and 

$7.6 million, respectively. 

Note 9 – Inventory 

Inventory consists primarily of raw materials, which are recorded at the lower of cost or market using the average-cost 
method, which approximates first-in, first-out (FIFO) cost. The Company periodically reviews its inventory for slow-moving, 
damaged and discontinued items and provides allowances to reduce such items identified to their recoverable amounts. 

The Company’s inventory consists of the following: 

(in thousands) 

December 31,  

2015 

2014 

Raw materials ...................................................................................................................   $ 
Work in process ...............................................................................................................     
Total inventory .................................................................................................................     
Allowance for obsolescence .............................................................................................     
Inventory, net of allowance ..............................................................................................   $ 

8,589     $ 
1,529       
10,118       
(347)     
9,771     $ 

5,728   
653   
6,381   
(187) 
6,194   

Note 10 – Financing Obligations 

The Company’s debt consists of the following: 

(in thousands) 

December 31,  

2015 

2014 

Various obligations under capital leases, with interest rates from 6.8% to 7.4%, due in 

various monthly installments, including interest, through various dates through 
January 2016, secured by equipment ............................................................................   $ 
Less current portion ..........................................................................................................     
Long-term obligation .......................................................................................................   $ 

-    $ 
-      
-    $ 

149   
139   
10   

The Company paid the remaining debt balance to be due in January 2016, in December 2015. 

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Note 11 – Employee Benefit Plans 

The Company maintains a 401(k) retirement plan that covers most of its employees. Under the plan, a full-time or 
regular  part-time  (over  20  hours/week)  employee  becomes  a  participant  after  completing  three  months  of  employment. 
Employees may elect to contribute up to 50 percent of regular gross pay, subject to federal law limits on the dollar amount 
that participants may contribute to the plan, each calendar year. The Company matches part of the employee contributions 
and may make a discretionary contribution to the plan. Total employer contributions were approximately $1.2 million, $0.8 
million and $0.6 million for the years ended December 31, 2015, 2014 and 2013, respectively. 

The Company also sponsors a defined contribution retirement plan that covers the employees of Proto Labs Limited. 
Total employer contributions were approximately $0.2 million for the year ended December 31, 2015, and immaterial for 
each of the years ended December 31, 2014 and 2013. 

Note 12 – Stock-Based Compensation 

The  Company  has  two  equity  incentive  plans:  the  2000  Stock  Option  Plan  (2000  Plan)  and  the  2012  Long-Term 
Incentive Plan (2012 Plan). Upon the adoption of the 2012 Plan on February 21, 2012, all shares that were reserved under 
the 2000 Plan but not issued were assumed by the 2012 Plan. No additional shares will be issued under the 2000 Plan. Under 
the 2012 Plan, the Company has the ability to grant stock options, stock appreciation rights (SARs), restricted stock, stock 
units, other stock-based awards and cash incentive awards. Awards under the 2012 Plan have a maximum term of ten years 
from the date of grant. The compensation committee of the board of directors may provide that the vesting or payment of any 
award will be subject to the attainment of specified performance measures in addition to the satisfaction of any continued 
service requirements, and the compensation committee will determine whether such measures have been achieved. The per 
share exercise price of stock options and SARs granted under the 2012 Plan generally may not be less than the fair market 
value of a share of our common stock on the date of the grant. 

The  Company’s  2012  Employee  Stock  Purchase  Plan  (ESPP)  allows  eligible  employees  to  purchase  shares  of  the 
Company’s common stock at a discount through payroll deductions of up to 15 percent of their eligible compensation, subject 
to plan limitations. The ESPP provides for six-month offering periods, and at the end of each offering period, employees are 
able to purchase shares at 85 percent of the lower of the fair market value of the Company’s common stock on the first trading 
day of the offering period or on the last trading day of the offering period.  

Employees purchased 31,905 and 25,393 shares of common stock at an average exercise price of $53.64 and $52.22 
during 2015 and 2014, respectively. As of December 31, 2015, 1,325,792 shares remained available for future issuance under 
the ESPP. 

The Company determines its stock-based compensation in accordance with ASC 718, which requires the measurement 
and recognition of compensation expense for all share-based payment awards made to employees and non-employee directors 
based on fair value. 

Determining the appropriate fair value model and calculating the fair value of stock option grants requires the input of 
subjective assumptions. The Company uses the Black-Scholes option pricing model to value its stock option awards. Stock-
based compensation expense is calculated using the Company’s best estimates, which involve inherent uncertainties and the 
application  of  management’s  judgment.  Significant  estimates  include  its  expected  term,  fair  value  of  Company  common 
stock, stock price volatility and forfeiture rates. 

The  expected  term  represents  the  weighted  average  period  that  the  Company’s  stock  options  are  expected  to  be 
outstanding. The expected term is based on the observed and expected time to post-vesting exercise of options by employees 
and  non-employee  directors  and  considers  the  impact  of  post-vesting  award  forfeitures.  Prior  to  its  IPO,  the  Company 
estimated the fair value of its common stock using the assistance of an independent third-party valuation specialist using the 
income and market approach. As the Company operated as a private company with a limited market for its stock from the 
Company’s inception to the completion of its IPO on February 29, 2012, the Company estimates its stock price volatility 
based on the volatility of a peer group of comparable publicly traded companies for which historical information is available. 
The  Company  bases  the  risk-free  interest  rate  that  it  uses  in  the  Black-Scholes  option  pricing  model  on  U.S.  Treasury 
instruments with maturities similar to the expected term of the award being valued. The Company has never paid and does 
not anticipate paying, any cash dividends in the foreseeable future and, therefore, the Company uses an expected dividend 
yield of zero in the option pricing model. In order to properly attribute compensation expense, the Company is required to 
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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

estimate pre-vesting forfeitures at the time of grant and revise those estimates in subsequent periods if actual forfeitures differ 
from  those  estimates.  The  Company  uses  historical  data  to  estimate  pre-vesting  forfeitures  and  record  stock-based 
compensation expense for those awards that are expected to vest. If the Company’s actual forfeiture rate is materially different 
from  its  estimate,  stock-based  compensation  expense  could  be  significantly  different  from  what  has  been  recorded.  The 
Company allocates stock-based compensation expense on a straight-line basis over the requisite service period. 

The following table summarizes stock-based compensation expense for the years ended December 31, 2015, 2014 and 

2013, respectively: 

(in thousands) 

Year Ended December 31, 
2014 

2015 

2013 

Stock options and other ......................................................................   $ 
Employee stock purchase plan ...........................................................     
Total stock-based compensation expense ...........................................   $ 

5,580    $ 
502      
6,082    $ 

4,386     $ 
423       
4,809     $ 

3,084  
377  
3,461  

Cost of revenue ..................................................................................   $ 
Operating expenses: 

Marketing and sales ........................................................................     
Research and development .............................................................     
General and administrative .............................................................     
Total stock-based compensation expense ...........................................   $ 
Income tax benefits ............................................................................     
Total stock-based compensation expense, net of tax ..........................   $ 

513    $ 

386     $ 

316  

1,074      
1,285      
3,210      
6,082    $ 
(1,859)     
4,223    $ 

927       
1,048       
2,448       
4,809     $ 
(1,524)     
3,285     $ 

610  
754  
1,781  
3,461  
(847) 
2,614  

Stock Options 

The  following  table  provides  the  assumptions  used  in  the  Black-Scholes  option  pricing  model  for  the  years  ended 

December 31, 2015, 2014 and 2013: 

2015 

Year Ended December 31, 
2014 

2013 

Risk-free interest rate ............................................................     1.69 -  1.77%         0.43 -  2.14%         1.03 -  1.98%   
Expected life (years) .............................................................     5.50 -  6.50 
Expected volatility ................................................................     46.80 -  47.23%       47.29 -  49.30%       49.36 -  53.54%  
Expected dividend yield ........................................................    
Weighted average grant date fair value .................................    

       5.50 -  6.50 

       2.00 -  6.50 

  0%    
$32.42 

  0%    
$32.65 

  0%    
$25.86 

67 

 
 
  
  
  
  
  
    
    
  
  
      
        
        
  
  
      
        
        
  
      
        
        
  
  
  
  
  
 
  
  
    
    
 
  
     
  
  
        
  
  
        
  
  
 
 
      
      
 
       
       
  
  
  
 
 
Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

The  following  table  summarizes  stock  option  activity  and  the  weighted  average  exercise  price  for  the  years  ended 

December 31, 2015, 2014 and 2013: 

     Weighted- 
Average 

   Stock Options      Exercise Price   

Options outstanding at January 1, 2013 ...........................................................................     
Granted .........................................................................................................................     
Exercised ......................................................................................................................     
Cancelled ......................................................................................................................     
Options outstanding at December 31, 2013 .....................................................................     
Granted .........................................................................................................................     
Exercised ......................................................................................................................     
Cancelled ......................................................................................................................     
Options outstanding at December 31, 2014 .....................................................................     
Granted .........................................................................................................................     
Exercised ......................................................................................................................     
Cancelled ......................................................................................................................     
Options outstanding at December 31, 2015 .....................................................................     

1,691,357     $ 
187,615       
(695,777)     
(39,945)     
1,143,250       
116,050       
(253,544)     
(6,769)     
998,987       
110,335       
(316,761)     
(26,519)     
766,042     $ 

11.11   
49.69   
7.79   
23.48   
19.03   
72.17   
13.77   
26.23   
26.49   
67.36   
14.36   
51.72   
36.52   

Exercisable at December 31, 2015 ...................................................................................     

409,301     $ 

19.28   

The outstanding options generally have a term of 10 years. For employees, options that have been granted become 
exercisable ratably over the vesting period, which is generally a five-year period, beginning on the first anniversary of the 
grant date, subject to the employee’s continuing service to the Company. For directors, options generally become exercisable 
in full on the first anniversary of the grant date. 

The total intrinsic value of options exercised during the years ended December 31, 2015, 2014 and 2013, was $18.6 
million, $16.3 million and $33.2 million, respectively. The aggregate intrinsic value represents the cumulative difference 
between the fair market value of the underlying common stock and the option exercise prices. 

For options outstanding at December 31, 2015, the weighted-average remaining contractual term was 6.5 years and the 
aggregate intrinsic value was $22.2 million. For options exercisable at December 31, 2015, the weighted-average remaining 
contractual term was 5.3 years and the aggregate intrinsic value was $18.4 million. Refer to the table below for additional 
information. 

The following table summarizes information about stock options outstanding at December 31, 2015: 

Range of Exercise 
Prices 

Options Outstanding, Vested and 
Expected to Vest 
Weighted 
Average 
Remaining 
Contractual 
Life 

Weighted 
Average 
Exercise 
Price ($) 

Number 
Outstanding 

Options Exercisable 

Weighted 
Average 
Exercise 
Price ($) 

Number 
Exercisable 

$0.00 to $7.85 
$7.86 
$7.87 to $31.43 
$31.44 to $47.15 
$47.16 to $66.87 
$66.88 to $78.59 

  ....................................     
  ....................................     
  ....................................     
  ....................................     
  ....................................     
  ....................................     

59,441      
206,955      
138,831      
88,146      
96,474      
176,195      

2.76     $ 
4.98       
6.15       
7.10       
7.87       
8.75       

5.03       
7.86       
28.19       
45.14       
57.52       
71.54       

59,441    $ 
206,955       
72,495       
19,504       
36,934       
13,972       

5.03   
7.86   
27.22   
42.70   
55.87   
78.53   

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

The  fair  value  of  share-based  payment  transactions  is  recognized  in  the  consolidated  statements  of  comprehensive 
income. As of December 31, 2015, there was $7.0 million of total unrecognized compensation cost related to unvested stock 
options, which is expected to be recognized over a weighted average period of 3.1 years. The total fair value of options vested 
was $2.8 million, $3.2 million and $2.4 million for the years ended December 31, 2015, 2014 and 2013, respectively. 

Restricted Stock 

The 2012 Plan provides for the award of restricted stock or restricted stock units. Restricted stock awards are share 
settled and restrictions lapse ratably over the vesting period, which is generally a five-year period, beginning on the first 
anniversary  of  the  grant  date,  subject  to  the  employee’s  continuing  service  to  the  Company.  For  directors,  restrictions 
generally lapse in full on the first anniversary of the grant date. 

The following table summarizes restricted stock activity for the years ended December 31, 2015 and 2014:  

     Weighted- 
Average 

     Grant Date 
   Restricted 
     Fair Value 
   Stock Awards      Per Share 

Restricted stock at January 1, 2014 ..................................................................................     
Granted .........................................................................................................................     
Restrictions lapsed ........................................................................................................     
Forfeited .......................................................................................................................     
Restricted stock at December 31, 2014 ............................................................................     
Granted .........................................................................................................................     
Restrictions lapsed ........................................................................................................     
Forfeited .......................................................................................................................     
Restricted stock at December 31, 2015 ............................................................................     

-    $ 
77,647       
(798)     
(275)     
76,574       
68,580       
(16,863)     
(3,898)     
124,393     $ 

-  
69.18   
62.68   
62.68   
69.27   
68.89   
69.25   
72.14   
68.97   

As of December 31, 2015, there was $6.6 million of unrecognized compensation expense related to non-vested restricted 

stock, which is expected to be recognized over a weighted-average period of 3.7 years. 

Employee Stock Purchase Plan 

The  following  table  presents  the  assumptions  used  to  estimate  the  fair  value  of  the  ESPP  during  the  years  ended 

December 31, 2015, 2014 and 2013: 

2015 

Year ended December 31, 
2014 

2013 

Risk-free interest rate ..................................................................    0.08 -  0.39%       0.01 -  0.11%       0.11 -  0.13%   
Expected life (months) ................................................................     
Expected volatility ......................................................................    29.41 -  37.64%     37.64 -  39.80%     39.80 -  53.32%  
Expected dividend yield ..............................................................     

0%   

0%   

0%   

6.00 

6.00 

6.00

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Note 13 – Commitments 

The Company leases property from third parties. The Company leases a portion of its U.S. facilities, and the lease terms 
expire between July 2017 and May 2018. The Company also leases office space in France, Germany and Italy with terms 
expiring at various times from 2015 to 2023. The Company leases an office and manufacturing space in Japan, and the initial 
term expires in November 2021. The Company has the ability to terminate this lease, with no penalty, upon six months’ 
notice. The Company also leases office and manufacturing space for Alphaform in Germany and Finland with terms expiring 
at various times from 2016 to 2018. 

Future minimum commitments under non-cancelable leases at December 31, 2015, are as follows: 

Operating 
Leases 

(in thousands) 
Years Ending December 31, 
2016...............................................................................................................................................................   $ 
2017...............................................................................................................................................................     
2018...............................................................................................................................................................     
2019...............................................................................................................................................................     
2020...............................................................................................................................................................     
After 2020 .....................................................................................................................................................     
Total future minimum lease payments ..........................................................................................................   $ 

2,041   
1,196   
825   
490   
462   
703   
5,717   

Rental expense was approximately $1.4 million, $1.0 million and $1.2 million for the years ended December 31, 2015, 

2014 and 2013, respectively. 

Note 14 – Accumulated Other Comprehensive Income 

Other comprehensive income is comprised entirely of foreign currency translation adjustments. The following table 
presents the changes in accumulated other comprehensive income balances for the years ending December 31, 2015, 2014 
and 2013, respectively: 

(in thousands) 

Foreign currency translation adjustments 

Year Ended December 31, 
2014 

2013 

2015 

Balance at beginning of period .......................................................   $ 
Other comprehensive loss before reclassifications .....................     
Amounts reclassified from accumulated other comprehensive 

income (loss).............................................................................     
Net current-period other comprehensive loss .................................     
Balance at end of period .................................................................   $ 

(2,929)   $ 
(2,283)     

-      
(2,283)     
(5,212)   $ 

(1,091 )   $ 
(1,838 )     

-       
(1,838 )     
(2,929 )   $ 

(928) 
(163) 

-  
(163) 
(1,091) 

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Note 15 – Income Taxes 

The Company is subject to income tax in multiple jurisdictions and the use of estimates is required to determine the 
provision for income taxes. For the years ended December 31, 2015, 2014 and 2013, the Company recorded an income tax 
provision of $21.3 million, $18.9 million and $16.3 million, respectively. The effective income tax rate for the years ended 
December 31, 2015, 2014 and 2013 was 31.5 percent, 31.2 percent and 31.6 percent, respectively. 

The provision for income taxes is based on income before income taxes reported for financial statement purposes. The 

components of income before income taxes are as follows: 

(in thousands) 

Year Ended December 31, 
2014 

2013 

2015 

Domestic ............................................................................................   $ 
Foreign ...............................................................................................     
Total ...................................................................................................   $ 

59,421     $ 
8,440       
67,861     $ 

51,052     $ 
9,479       
60,531     $ 

45,659   
5,919   
51,578   

Significant components of the provision for income taxes for the following periods are as follows: 

(in thousands) 

Current: 

Year Ended December 31, 
2014 

2013 

2015 

Federal ............................................................................................   $ 
State ................................................................................................     
Foreign ............................................................................................     

Deferred 

Federal ............................................................................................     
State ................................................................................................     
Foreign ............................................................................................     
Valuation Allowance ..........................................................................     
Total ...................................................................................................   $ 

15,845    $ 
1,074       
1,591       

2,798      
(38)     
294       
(217)     
21,347     $ 

17,413     $ 
1,185       
2,149       

(1,821 )     
(17 )     
130       
(143 )     
18,896     $ 

13,934   
379   
1,762   

168   
(39) 
(335) 
432   
16,301   

A reconciliation of the federal statutory income tax rate to the effective tax rate is as follows: 

Year Ended December 31, 
2014 

2013 

2015 

Federal tax statutory rate ...................................................................      
State tax (net of federal benefit) ........................................................      
Qualified subsidiary election .............................................................      
Valuation allowance against deferred tax assets ...............................      
Research and development credit ......................................................      
Foreign rate differential .....................................................................      
Tax reserves ......................................................................................      
Domestic manufacturing deduction...................................................      
Miscellaneous ....................................................................................      
Total ..................................................................................................      

35.0%     
0.5       
0.6       
(0.3)      
(2.9)      
(1.8)      
1.5       
(1.4)      
0.3       
31.5%     

35.0%     
0.5        
0.2        
(0.2)      
(0.8)      
(2.1)      
0.4        
(2.1)      
0.3        
31.2%     

35.0% 
0.6   
(0.8) 
0.8   
(1.8) 
(1.6) 
0.6   
(1.1) 
(0.1) 
31.6% 

On January 2, 2013, the American Taxpayer Relief Act of 2012 (the Act) was signed into law. Included in the Act 
was the extension of the research and development credit for years 2012 and 2013. As the Act was enacted during 2013, the 

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

federal portion of the 2012 research and development credit was recognized in the first quarter of 2013. The Company 
recorded a tax benefit of $0.5 million for the 2012 federal research credit, which translated to an effective income tax rate 
reduction of 0.9 percent for the year ended December 31, 2013.  

Significant components of deferred tax assets and liabilities are as follows: 

(in thousands) 

Deferred tax assets: 

December 31, 

2015 

2014 

Accrued expenses .........................................................................................................   $ 
Warrants and stock options ...........................................................................................     
Intangibles ....................................................................................................................     
Inventories ....................................................................................................................     
Other assets ...................................................................................................................     
Net operating loss .........................................................................................................     
Less valuation allowance ..........................................................................................     
Total deferred tax assets ...................................................................................................     
Deferred tax liabilities: 

Depreciation .................................................................................................................     
Goodwill .......................................................................................................................     
Total deferred tax liabilities .............................................................................................     
Net deferred tax liability ..................................................................................................   $ 

628     $ 
2,828       
499       
177       
856       
2,409       
(2,625)     
4,772       

(7,945)     
(1,067)     
(9,012)     
(4,240)   $ 

378  
2,152  
319  
172  
527  
2,842  
(3,048) 
3,342  

(4,246) 
(430) 
(4,676) 
(1,334) 

The Company has recorded no U.S. deferred taxes related to the undistributed earnings of its non-U.S. subsidiaries as 
of  December  31,  2015.  Such  amounts  are  intended  to  be  reinvested  outside  of  the  United  States  indefinitely.  It  is  not 
practicable to estimate the amount of additional tax that might be payable on the foreign earnings. As of December 31, 2015, 
the Company had accumulated undistributed earnings in non-U.S. subsidiaries of $25.8 million. 

As of December 31, 2015, the Company had estimated net operating loss carry forwards of $2.4 million for tax purposes. 
The net operating losses primarily relate to Japan operations and can be carried forward for ten years but are limited to 65 
percent of taxable income. The net operating losses begin to expire at various dates between 2018 and 2023. The Company’s 
Japan operations are taxed both by local authorities and in the U.S. Accordingly, a portion of Japan’s net operating losses has 
been recognized as a benefit in the U.S. 

The  Company  establishes valuation  allowances  for  deferred tax  assets when,  after  consideration  of all  positive  and 
negative evidence, it is considered more-likely-than-not that a portion of the deferred tax assets will not be realized. The 
Company's valuation allowances of $2.6 million and $3.0 million at December 31, 2015 and December 31, 2014, respectively, 
reduce the carrying value of deferred tax assets associated with certain net operating loss carry forwards and other assets with 
insufficient positive evidence for recognition. The decrease in the valuation allowance is primarily attributable to fluctuations 
in foreign currency and the recognition of net operating losses against Japan’s 2015 taxable income. 

The Company files a U.S. federal income tax return and income tax returns in various states and foreign jurisdictions. 
With a few exceptions, the Company is no longer subject to U.S. federal, state, or foreign income tax examinations by tax 
authorities for years before 2011. 

The Company has liabilities related to unrecognized tax benefits totaling $2.8 million and $1.3 million at December 31, 
2015 and 2014, respectively, that if recognized would result in a reduction of the Company’s effective tax rate. The liabilities 
are  classified  as  other  long-term  liabilities  in  the  accompanying  consolidated  balance  sheets.  The  Company  does  not 
anticipate that total unrecognized tax benefits will materially change in the next twelve months. The Company recognizes 
interest and penalties related to income tax matters in income tax expense and reports the liability in current or long-term 
income taxes payable as appropriate. Interest and penalties were immaterial for each of the years ended December 31, 2015, 
2014 and 2013.  

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Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows: 

December 31, 

2015 

2014 

Balance at beginning of period.........................................................................................   $ 
Additions for tax positions of current year .......................................................................     
Additions for tax positions of prior years .........................................................................     
Decrease related to expiration of statutes of limitations...................................................     
Balance at period end .......................................................................................................   $ 

1,295     $ 
919       
555       
-      
2,769     $ 

695  
632  
344  
(376) 
1,295  

Note 16 – Litigation 

From time to time, the Company may be subject to various legal proceedings and claims that arise in the ordinary course 
of its business. Although the results of litigation and claims cannot be predicted with certainty, the Company does not believe 
it  is  a  party  to  any  litigation  the  outcome  of  which,  if  determined  adversely,  would  individually  or  in  the  aggregate  be 
reasonably expected to have a material adverse effect on its business. 

Note 17 – Segment and Geographic Information 

The Company’s CEO, who is the Company’s chief operating decision maker, makes decisions to operate the business 
and allocate resources based on review of operating results at the consolidated level. As a result, the Company has determined 
that it has only one operating segment, and therefore, one reportable segment. 

The Company’s revenue is derived from its Injection Molding (Protomold), CNC Machining (Firstcut) and 3D Printing 

(Fineline) product lines. Total revenue by product lines is as follows: 

(in thousands) 

Revenue: 

Year Ended December 31, 
2014 

2015 

2013 

Injection Molding (Protomold) .......................................................   $ 
CNC Machining (Firstcut) ..............................................................     
3D Printing (Fineline) .....................................................................     
Other ...............................................................................................     
Total revenue ..................................................................................   $ 

163,387     $
74,368       
25,132       
1,219       
264,106     $

140,282     $
59,914       
9,387       
-       
209,583     $

115,069   
48,043   
-   
-   
163,112   

73 

 
 
  
  
  
  
  
    
  
  
      
        
  
  
  
  
  
  
  
  
  
  
    
    
  
  
      
        
        
  
      
        
        
  
  
  
 
 
Proto Labs, Inc. 
Notes to Consolidated Financial Statements 

Revenue  from  external  customers  based  on  the  billing  location  of  the  end  user  customer  and  long-lived  assets  by 

geographic region are as follows: 

(in thousands) 

Revenue: 

Year Ended December 31, 
2014 

2015 

2013 

United States ...................................................................................   $ 
International ....................................................................................     
Total revenue ..................................................................................   $ 

194,065     $
70,041       
264,106     $

156,033     $
53,550       
209,583     $

119,870   
43,242   
163,112   

(in thousands) 

Long-lived assets: 

December 31, 

2015 

2014 

United States .................................................................................................................   $
International ..................................................................................................................     
Total long-lived assets ..................................................................................................   $

98,633     $
26,842       
125,475     $

76,923   
14,703   
91,626   

74 

 
 
   
  
  
  
  
    
    
  
  
      
        
        
  
      
        
        
  
  
  
  
  
    
  
  
      
        
  
      
        
  
  
  
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure 

Not applicable. 

Item 9A. Controls and Procedures 

Evaluation of Disclosure Controls and Procedures 

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, has evaluated the 
effectiveness of the design and operation of our disclosure controls and procedures (as defined in Rule 13a-15(e) under the 
Securities  Exchange  Act  of  1934  (Exchange  Act))  as  of  the  end  of  the  period  covered  by  this  report.  Based  upon  that 
evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of the period covered 
by  this  Annual  Report  on  Form  10-K,  our  disclosure  controls  and  procedures  were  effective  and  provided  reasonable 
assurance that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is 
recorded, processed, summarized and reported accurately and within the time frames specified in the SEC’s rules and forms 
and accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, 
as appropriate to allow timely decisions regarding required disclosure. 

Management’s Annual Report on Internal Control Over Financial Reporting 

The Company’s management is responsible for establishing and maintaining an adequate system of internal control 
over  financial  reporting,  as  defined  in  the  Exchange  Act  Rule  13a-15(f).  Management  conducted  an  assessment  of  the 
Company’s internal control over financial reporting based on the framework established by the Committee of Sponsoring 
Organizations of the Treadway Commission in Internal Control – Integrated Framework (2013 framework). Based on the 
assessment, management concluded that, as of December 31, 2015, the Company’s internal control over financial reporting 
is effective. The Company’s registered public accounting firm’s attestation report on the Company’s internal control over 
financial reporting is provided in Part II, Item 8 of this Annual Report on Form 10-K. 

Management excluded the internal controls of Alphaform from its assessment of internal control over financial reporting 
as of December 31, 2015 given its acquisition date of Alphaform in October 2015. The operations acquired from Alphaform 
reside  in  wholly-owned  subsidiaries  of  the  Company  whose  combined  total  assets  and  total  revenues  excluded  from 
management's assessment represent approximately 6% and 2%, respectively, of the related consolidated financial statements 
amounts as of the year ended December 31, 2015. 

Changes in Internal Control over Financial Reporting 

There have been no changes in our internal control over financial reporting (as such term is defined in Rule 13a-15(f) 
under the Exchange Act) during the period covered by this report that have materially affected, or are reasonably likely to 
materially affect, our internal control over financial reporting.  

Item 9B. Other Information 

None. 

75 

 
  
  
  
  
  
  
  
  
  
  
  
  
  
   
 
 
Item 10. Directors, Executive Officers and Corporate Governance 

PART III 

The information required by this item with respect to Item 401 relating to executive officers is contained in Item 1 of 
this  Annual  Report  on  Form  10-K  under  the  heading  “Executive  Officers  of  the  Registrant”  and  with  respect  to  other 
information relating to our directors will be set forth in our 2016 Proxy Statement under the caption “Proposal 1 — Election 
of Directors,” which will be filed no later than 120 days after the end of the fiscal year covered by this Annual Report on 
Form 10-K, and is incorporated herein by reference.  

The information required by this item under Item 405 of Regulation S-K is incorporated herein by reference to the 
section  titled  “Corporate  Governance  —  Section  16(a)  Beneficial  Ownership  Reporting  Compliance”  of  our  2016  Proxy 
Statement, which will be filed no later than 120 days after the end of the fiscal year covered by this Annual Report on Form 
10-K. The information required by this item under Items 407 (c)(3), (d)(4) and (d)(5) of Regulation S-K is incorporated herein 
by reference to the section titled “Corporate Governance” of our 2015 Proxy Statement, which will be filed no later than 120 
days after the end of the fiscal year covered by this Annual Report on Form 10-K. 

We have adopted a Code of Ethics and Business Conduct that applies to all of our directors, officers and employees, 
including our principal executive officer and principal financial officer. The Code of Ethics and Business Conduct is available 
on our website at www.protolabs.com under the Investors Relations section. We plan to post to our website at the address 
described above any future amendments or waivers of our Code of Ethics and Business Conduct. 

Item 11. Executive Compensation 

Information related to this item is incorporated herein by reference to the sections titled “Compensation Discussion and 
Analysis,” “Corporate Governance — Compensation Committee Interlocks and Insider Participation,” and “Compensation 
Committee Report” of our 2016 Proxy Statement, which will be filed no later than 120 days after the end of the fiscal year 
covered by this Annual Report on Form 10-K. 

Item 12. Security Ownership of Certain Beneficial Owners and Management  

Information related to security ownership required by this item is incorporated herein by reference to the section titled 
“Security Ownership of Certain Beneficial Owners and Management” of our 2016 Proxy Statement, which will be filed no 
later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K. Information related to our 
equity  compensation  plans  required  by  this  item  is  incorporated  herein  by  reference  to  the  section  titled  “Compensation 
Discussion and Analysis – Information Regarding Equity-Based Compensation Plans” of our 2016 Proxy Statement, which 
will be filed no later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K. 

Item 13. Certain Relationships and Related Transactions, and Director Independence 

Information required by this item is incorporated herein by reference to the sections titled “Corporate Governance — 
Certain Relationships and Related Party Transactions,” and “Corporate Governance — Director Independence” of our 2016 
Proxy Statement, which will be filed no later than 120 days after the end of the fiscal year covered by this Annual Report on 
Form 10-K. 

Item 14. Principal Accountant Fees and Services 

Information required by this item is incorporated herein by reference to the section titled “Fees Paid to Independent 
Registered Public Accounting Firm” of our 2016 Proxy Statement, which will be filed no later than 120 days after the end of 
the fiscal year covered by this Annual Report on Form 10-K. 

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PART IV 

Item 15. Exhibits and Financial Statement Schedules 

(a) The following documents are filed as part of this report: 

1. Consolidated Financial Statements  

See Index to Consolidated Financial Statement at Item 8 herein. 

2. Financial Statement Schedules 

Schedules not listed above have been omitted because the information required to be set forth therein is not 
applicable or is shown in the financial statement or notes herein. 

3. Exhibits 

See the Exhibit Index immediately following the signature page of this Annual Report on Form 10-K.      

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SIGNATURE 

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly 

caused this report to be signed on its behalf by the undersigned thereunto duly authorized. 

Date: February 26, 2016 

Date: February 26, 2016 

Proto Labs, Inc. 

/s/ Victoria M. Holt 
Victoria M. Holt 
President and Chief Executive Officer 
(Principal Executive Officer) 

/s/ John A. Way 
John A. Way 
Chief Financial Officer 
(Principal Financial and Accounting Officer) 

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following 

persons on behalf of the Registrant in the capacities and on the dates indicated.  

Date: February 26, 2016 

Date: February 26, 2016 

/s/ Victoria M. Holt 
Victoria M. Holt 
President and Chief Executive Officer and Director 
(Principal Executive Officer) 

/s/ John A. Way 
John A Way 
Chief Financial Officer 
(Principal Financial and Accounting Officer) 

Chairman of the Board of Directors: 
Lawrence J. Lukis* 

Directors: 
Rainer Gawlick* 
John B. Goodman* 
Douglas W. Kohrs* 
Brian K. Smith* 
Sven A. Wehrwein* 

*Victoria M. Holt, by signing her name hereto, does hereby sign this document on behalf of each of the above named 
officers and directors of the registrant pursuant to powers of attorney duly executed by such persons and filed as an exhibit 
hereto.  

Date: February 26, 2016 

/s/ Victoria M. Holt 
Victoria M. Holt 
President and Chief Executive Officer 
(Principal Executive Officer) 

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EXHIBIT INDEX 

Exhibit 
Number 
3.1(1) 

3.2(27) 

Description of Exhibit 

  Third Amended and Restated Articles of Incorporation of Proto Labs, Inc. 
Articles of Amendment to Third Amended and Restated Articles of Incorporation of Proto Labs, Inc. dated May
20, 2015 
  Amended and Restated By-Laws of Proto Labs, Inc. 
  Form of certificate representing common shares of Proto Labs, Inc. 
  2012 Long-Term Incentive Plan, as amended as of August 5, 2015 
  Form of Incentive Stock Option Agreement under 2012 Long-Term Incentive Plan 
  Form of Non-Statutory Stock Option Agreement (Directors) under 2012 Long-Term Incentive Plan 
  Form of Non-Statutory Stock Option Agreement (U.S. Employees) under 2012 Long-Term Incentive Plan 
  Form of Non-Statutory Stock Option Agreement (U.K. Employees) under 2012 Long-Term Incentive Plan 
  Employee Stock Purchase Plan 
  Stock Subscription Warrant issued to John B. Tumelty 
  2000 Stock Option Plan, as amended 
  Form of Incentive Stock Option Agreement under 2000 Stock Option Plan 

3.3(2) 
4.1(3) 
10.1(4)# 
10.2(5)# 
10.3(6)# 
10.4(7)# 
10.5(8)# 
10.6(9)# 
10.7(10) 
10.8(11)# 
10.9(12)# 
10.10(13)#    Form of Non-Statutory Stock Option Agreement (Directors) under 2000 Stock Option Plan 
10.11(14)#    Form of Non-Statutory Stock Option Agreement (U.S. Employees) under 2000 Stock Option Plan 
10.12(15)#    Form of Non-Statutory Stock Option Agreement (U.S. Employees) under 2000 Stock Option Plan 
10.13(16)#    Form of Non-Statutory Stock Option Agreement (U.K. Employees) under 2000 Stock Option Plan 

10.14(17)#    

Amended and Restated Credit Agreement, dated as of September 30, 2011, between Proto Labs, Inc. and Wells
Fargo Bank, N.A. 

10.15(18)#    Letter Agreement, dated as of September 9, 2010, between Proto Labs, Inc., and Thomas Pang 
10.16(19)#    Form of U.S. Severance Agreement 
10.17(20)#    Form of UK Severance Agreement 

10.18(21)#    

10.19(22)#    

Executive Employment Agreement, dated February 6, 2014, by and between Proto Labs, Inc. and Victoria M.
Holt 
Form of Restricted Stock Agreement under 2012 Long-Term Incentive Plan for the initial grant to Victoria M.
Holt 

10.20(23)#    Form of Restricted Stock Unit Agreement under 2012 Long-Term Incentive Plan (U.S. Employees) 
10.21(24)#    Form of Restricted Stock Unit Agreement under 2012 Long-Term Incentive Plan (U.K. Employees) 
10.22(25)#    Form of Restricted Stock United Agreement under 2012 Long-Term Incentive Plan (Directors) 
10.23(26)#    Severance Agreement, dated December 18, 2014, by and between Proto Labs, Inc. and John A. Way 
10.24(28)#    Form of Severance Agreement with Executive Officers 

21.1 
23.1 
24.1 
31.1 
31.2 

32.1* 

  Subsidiaries of Proto Labs, Inc. 
  Consent of Ernst & Young LLP 
  Powers of Attorney 
  Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act 
  Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act 
Certification  of  the  Chief  Executive  Officer  and  the  Chief  Financial  Officer  pursuant  to  Section  906  of  the
Sarbanes-Oxley Act 
  XBRL Instance Document 

101.INS 
101.SCH    XBRL Taxonomy Extension Schema Document 
101.CAL    XBRL Taxonomy Extension Calculation Linkbase Document 
101.DEF    XBRL Taxonomy Extension Definition Linkbase Document 
101.LAB    XBRL Taxonomy Extension Label Linkbase Document 
101.PRE    XBRL Taxonomy Extension Presentation Linkbase Document 

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(1)

(2)

(3)

Incorporated by reference to Exhibit 3.2 to the Company’s Registration Statement on Form S-1/A (File No. 333-175745), 
filed with the Commission on February 13, 2012. 
Incorporated by reference to Exhibit 3.4 to the Company’s Registration Statement on Form S-1/A (File No. 333-175745), 
filed with the Commission on February 13, 2012. 
Incorporated by reference to Exhibit 4.1 to the Company’s Registration Statement on Form S-1/A (File No. 333-175745), 
filed with the Commission on February 13, 2012. 

(10)

(9)

(7)

(8)

(6)

(4)  Incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q, filed with the Commission on November 3, 2015.
(5)
Incorporated  by  reference  to  Exhibit  10.14  to  the  Company’s  Registration  Statement  on  Form  S-1/A  (File  No.  333-
175745), filed with the Commission on February 13, 2012.  
Incorporated  by  reference  to  Exhibit  10.15  to  the  Company’s  Registration  Statement  on  Form  S-1/A  (File  No.  333-
175745), filed with the Commission on February 13, 2012.  
Incorporated  by  reference  to  Exhibit  10.16  to  the  Company’s  Registration  Statement  on  Form  S-1/A  (File  No.  333-
175745), filed with the Commission on February 13, 2012.  
Incorporated  by  reference  to  Exhibit  10.17  to  the  Company’s  Registration  Statement  on  Form  S-1/A  (File  No.  333-
175745), filed with the Commission on February 13, 2012.  
Incorporated  by  reference  to  Exhibit  10.18  to  the  Company’s  Registration  Statement  on  Form  S-1/A  (File  No.  333-
175745), filed with the Commission on February 13, 2012. 
Incorporated by reference to Exhibit 99.7 to the Company’s Registration Statement on Form S-8 (File No. 333-179651), 
filed with the Commission on February 23, 2012. 
Incorporated by reference to Exhibit 10.7 to the Company’s Registration Statement on Form S-1 (File No. 333-175745), 
filed with the Commission on July 25, 2011.  
Incorporated by reference to Exhibit 10.8 to the Company’s Registration Statement on Form S-1 (File No. 333-175745), 
filed with the Commission on July 25, 2011. 
Incorporated by reference to Exhibit 10.9 to the Company’s Registration Statement on Form S-1 (File No. 333-175745), 
filed with the Commission on July 25, 2011. 
Incorporated by reference to Exhibit 10.10 to the Company’s Registration Statement on Form S-1 (File No. 333-175745), 
filed with the Commission on July 25, 2011. 
Incorporated by reference to Exhibit 10.11 to the Company’s Registration Statement on Form S-1 (File No. 333-175745), 
filed with the Commission on July 25, 2011. 
Incorporated by reference to Exhibit 10.12 to the Company’s Registration Statement on Form S-1 (File No. 333-175745), 
filed with the Commission on July 25, 2011. 
Incorporated  by  reference  to  Exhibit  10.19  to  the  Company’s  Registration  Statement  on  Form  S-1/A  (File  No.  333-
175745), filed with the Commission on October 26, 2011. 
Incorporated  by  reference  to  Exhibit  10.21  to  the  Company’s  Registration  Statement  on  Form  S-1/A  (File  No.  333-
175745), filed with the Commission on February 13, 2012. 

(13)  

(14)  

(15)  

(11)  

(12)  

(16)  

(17)

(18)

(19)  Incorporated by reference to Exhibit 99.1 to the Company’s Form 8-K, filed with the Commission on March 1, 2013. 
(20)  Incorporated by reference to Exhibit 10.2 to the Company’s Form 10-Q, filed with the Commission on May 8, 2013. 
(21)  Incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K, filed with the Commission on February 6, 2014. 
(22)  Incorporated by reference to Exhibit 10.2 to the Company’s Form 8-K, filed with the Commission on February 6, 2014. 
(23)  Incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K, filed with the Commission on February 12, 2014.
(24)  Incorporated by reference to Exhibit 10.2 to the Company’s Form 8-K, filed with the Commission on February 12, 2014.
Incorporated by reference to Exhibit 99.6 to the Company's Registration Statement on Form S-8 (file No. 333-194272), 
filed with the Commission on March 3, 2014. 

(25)  

(26)  Incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K, filed with the Commission on December 19, 2014.
(27)  Incorporated by reference to Exhibit 3.1 to the Company’s Form 8-K, filed with the Commission on May 21, 2015. 
(28)  Incorporated by reference to Exhibit 3.1 to the Company’s Form 8-K, filed with the Commission on April 6, 2015. 

#  Indicates management contract or compensatory plan or arrangement. 
*

The certifications furnished in Exhibit 32.1 hereto are deemed to accompany this Annual Report on Form 10-K and will 
not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended. Such certifications
will not be deemed to be incorporated by reference into any filings under the Securities Act of 1933, as amended, or the
Securities  Exchange  Act  of  1934,  as  amended,  except  to  the  extent  that  the  registrant  specifically  incorporates  it  by
reference. 

80