Item 1A. RISK FACTORS

In addition to the other information in this Form 10-K, the following factors should be considered in evaluating our business. Our operating results depend upon many factors and are subject to various risks and uncertainties. The most significant risks and uncertainties known to us which may cause our operating results to vary from anticipated results or which may negatively affect our operating results and profitability are as follows:

Company Risks

Products that we sell may expose us to potential material liability for property damage, environmental damage, personal injury, or death linked to the use of those products by our customers. Some of our customers operate in challenging industries where there is a material risk of catastrophic events. We are actively seeking to expand our sales to certain categories of customers, some of whose businesses may entail heightened levels of such risk. If any of these events are linked to the use by our customers of any of our products, claims could be brought against us by those customers, by governmental authorities, and by third parties who are injured or damaged as a result of such events. In addition, our reputation could be adversely affected by negative publicity surrounding such events regardless of whether or not claims against us are successful. While we maintain insurance coverage to mitigate a portion of this risk and may have recourse against our suppliers for losses arising out of defects in products procured from them, we could experience significant losses as a result of claims made against us to the extent adequate insurance is not in place, the products are manufactured by us or legal recourse against our suppliers is otherwise not available, or our insurers or suppliers are unwilling or unable to satisfy their obligations to us.

We may be unable to meet our goals regarding the growth drivers of our business. Our sales growth is dependent primarily on our ability to attract new customers and increase our activity with existing customers. Historically, the most effective way to attract new customers has been opening new stores. In recent years, however, we have devoted increased resources to other growth drivers, including our industrial vending business (which is discussed in more detail below), our Onsite business, and our national accounts team. While we have taken steps to build momentum in the growth drivers of our business, we cannot assure you those steps will lead to additional sales growth. Failure to achieve any of our goals regarding industrial vending, Onsite locations, national accounts signings, our CSP 16 (Customer Service Project 2016) initiative, or other growth drivers could negatively impact our long-term sales growth.

Changes in customer or product mix, downward pressure on sales prices, and changes in volume of orders could cause our gross profit percentage to fluctuate or decline in the future. Changes in our customer or product mix could cause our gross profit percentage to fluctuate or decline. For example, the portion of our sales attributable to fasteners has been decreasing in recent years. That has adversely affected our gross profit percentage as our non-fastener products generally carry lower gross profit margins than our fastener products. Also, as noted below, our strategy of growing our pre-tax profit margin by increasing our average annual sales per store has contributed to a drop in our gross profit percentage due to resulting changes in our customer mix. If our customer or product mix continues to change, our gross profit percentage may decline further. Downward pressure on sales prices and changes in the volume of our orders could also cause our gross profit percentage to fluctuate or decline. We can experience downward pressure on sales prices as a result of deflation, pressure from customers to reduce costs, or increased competition. Reductions in our volume of purchases can adversely impact gross profit by reducing supplier volume allowances. During 2016 and 2015, our gross profit continued to be adversely impacted by changes in customer and product mix. The decrease in 2015 was amplified by a reduction in our customers' discretionary spending in the fourth quarter.

Our 'pathway-to-profit' strategy, the goal of which is to improve our pre-tax profit margins by growing the average annual sales of our stores, may prove unsuccessful on a long-term basis. In April 2007, we introduced our 'pathway-to-profit' strategy. That strategy involved slowing our annual new store openings and investing the funds saved by opening fewer stores in additional sales and sales leadership personnel. Under the 'pathway-to-profit' strategy, our goal is to increase our average annual sales per store, which would allow us to capture earnings leverage (by spreading operating and administrative expenses over higher sales) and grow our pre-tax profit margin. Our gross profit margin generally decreases as our average per store sales increase, as larger stores sell to larger customers whose more focused buying patterns merit more competitive pricing. However, our operating and administrative expenses, expressed as a percentage of net sales, typically improve as average per store sales grow. In most years the net effect is an increase in our pre-tax profit margin, as the relative improvement in operating and administrative expenses offsets the decrease in gross profit margin. A downturn in the economy or in the principle markets served by us or difficulty in attracting and retaining qualified sales and sales leadership personnel could adversely impact our ability to continue to grow our average per store sales. In addition, greater than expected decreases in our gross profit margin resulting from changes in customer mix or other factors noted above, or the failure to control operating and administrative expenses to the degree necessary to offset expected decreases in our gross profit margin, could adversely impact our pre-tax profit margin even as average per store sales increase.

Our competitive advantage in our industrial vending business could be eliminated and the loss of key suppliers of equipment and services for that business could be disruptive. We believe we have a competitive advantage in industrial vending due to our vending hardware and software, our local store presence (allowing us to service machines more rapidly), our 'vendible'

product depth, and in North America, our distribution strength. These advantages have developed over time; however, other competitors could respond to our expanding industrial vending business with highly competitive platforms of their own. Such competition could negatively impact our ability to expand our industrial vending business or negatively impact the economics of that business. In addition, we currently rely on a limited number of suppliers for the vending machines used in, and certain software and services needed to operate, our industrial vending business. While these machines, software, and services can be obtained from other sources, loss of our current suppliers or difficulties transitioning our industrial vending hosting services could be disruptive.

The ability to identify new products and product lines, and integrate them into our selling locations and distribution network, may impact our ability to compete and our sales and profit margins. Our success depends in part on our ability to develop product expertise at the store level and identify future products and product lines that complement existing products and product lines and that respond to our customers' needs. We may not be able to compete effectively unless our product selection keeps up with trends in the markets in which we compete or trends in new products. In addition, our ability to integrate new products and product lines into our stores and distribution network could impact sales and profit margins.

Our ability to successfully attract and retain qualified personnel to staff our selling locations could impact labor costs, sales at existing selling locations, and the successful execution of our growth drivers. Our success depends in part on our ability to attract, motivate, and retain a sufficient number of qualified employees, including store managers, outside sales personnel, and other store associates, who understand and appreciate our culture and are able to adequately represent this culture to our customers. Qualified individuals of the requisite caliber and number needed to fill these positions may be in short supply in some areas, and the turnover rate in the industry is high. If we are unable to hire and retain personnel capable of consistently providing a high level of customer service, as demonstrated by their enthusiasm for our culture and product knowledge, our sales could be materially adversely affected. Additionally, competition for qualified employees could require us to pay higher wages to attract a sufficient number of employees. An inability to recruit and retain a sufficient number of qualified individuals in the future may also delay the planned openings of new stores and planned expansion of our other selling channels.

Our inability to transition key executive officers may divert the attention of other members of our senior management from our existing operations. Our success depends on the efforts and abilities of our senior management and we have had some transition in our executive officers over the last few years. Difficulties in smoothly implementing that transition, or of recruiting suitable replacements in the event of unsuccessful transitions, could divert the attention of other members of our senior management team from our existing operations.

We may not be able to compete effectively against our competitors, which could cause us to lose market share or erode our operating income. The industrial, construction, and maintenance supply industry, although consolidating, still remains a large, fragmented industry that is highly competitive. Our current or future competitors may include companies with similar or greater market presence, name recognition, and financial, marketing, and other resources, and we believe they will continue to challenge us with their product selection, financial resources, and services. Increased competition from brick and mortar retailers in markets in which we have stores or from on-line retailers (particularly those major internet providers who can offer a wide range of products and rapid delivery), and the adoption by competitors of aggressive pricing strategies and sales methods, could cause us to lose market share or reduce our prices or increase our spending, thus eroding our operating income.

Interruptions in the proper functioning of information systems could disrupt operations and cause unanticipated increases in costs and/or decreases in revenues. The proper functioning of our information systems is critical to the successful operation of our business. Although our information systems are protected with robust backup systems, including physical and software safeguards and remote processing capabilities, information systems are still vulnerable to natural disasters, power losses, unauthorized access, telecommunication failures, and other problems. In addition, certain software used by us is licensed from, and certain services related to our information systems are provided by, third parties who could choose to discontinue their relationship with us. If critical information systems fail or these systems or related software or services are otherwise unavailable, our ability to process orders, maintain proper levels of inventories, collect accounts receivable, pay expenses, and maintain the security of Company and customer data could be adversely affected.

In the event of a cyber security incident, we could experience certain operational interruptions, incur substantial additional costs, become subject to legal or regulatory proceedings, or suffer damage to our reputation in the marketplace. The nature of our business requires us to receive, retain, and transmit certain personally identifying information that our customers provide to purchase products or services, register on our websites, or otherwise communicate and interact with us. While we have taken and continue to undertake significant steps to protect our customer and confidential information, a compromise of our data security systems or those of businesses we interact with could result in information related to our customers or business being obtained by unauthorized persons. We develop and update processes and maintain systems in an effort to try to prevent this from occurring, but the development and maintenance of these processes and systems are costly and require ongoing monitoring and updating as technologies change and efforts to overcome security measures become more sophisticated. Consequently, despite our efforts, the possibility of cyber security incidents cannot be eliminated entirely. While we also seek to obtain assurances that third parties we interact with will protect confidential information, there is a risk the confidentiality of

data held or accessed by third parties may be compromised. If a compromise of our data security were to occur, it could interrupt our operations, subject us to additional legal, regulatory, and operating costs, and damage our reputation in the marketplace.

Our business is subject to a wide array of laws and regulations in every jurisdiction where we operate. Compliance with these laws and regulations increases the cost of doing business and failure to comply could result in the imposition of fines or penalties and the termination of contracts. We are subject to a variety of laws and regulations including without limitation; import and export requirements, anti-bribery and corruption laws, tax laws (including U.S. taxes on foreign subsidiaries), product compliance laws, environmental laws, foreign exchange controls and cash repatriation restrictions, advertising regulations, data privacy and cyber security requirements, regulations on suppliers regarding the sources of supplies or products, labor and employment laws, and anti-competition regulations. In addition, as a supplier to federal, state, and local government agencies, we must comply with certain laws and regulations relating specifically to the formation, administration, and performance of our governmental contracts. We are also subject to governmental audits and inquiries in the normal course of business. Ongoing audit activity and changes to the legal and regulatory environments could increase the cost of doing business, and such costs may increase in the future as a result of changes in these laws and regulations or in their interpretation. While we have implemented policies and procedures designed to facilitate compliance with these laws and regulations, there can be no assurance that our employees, contractors, or agents will not violate such laws and regulations, or our policies. Any such violations could result in the imposition of fines and penalties, damage to our reputation, and, in the case of laws and regulations relating specifically to governmental contracts, the loss of those contracts.

We may not be successful in integrating acquisitions and achieving intended benefits and synergies. We have completed several acquisitions of businesses in recent years. We expect to continue to pursue strategic acquisitions that we believe will either expand or complement our business in new or existing markets or further enhance the value and offerings we are able to provide to our existing or future potential customers. Acquisitions involve numerous risks and challenges, including, among others, a risk of potential loss of key employees of an acquired business, inability to achieve identified operating and financial synergies anticipated to result from an acquisition, diversion of our capital and our management's attention from other business issues, and risks related to the integration of the acquired business including unanticipated changes in our business, our industry, or general economic conditions that affect the assumptions underlying the acquisition. Any one or more of these factors could cause us to not realize the benefits anticipated to result from the acquisitions.

Industry and General Economic Risks

A downturn in the economy or in the principal markets served by us and other factors may affect customer spending, which could harm our operating results. In general, our sales represent spending on discretionary items or consumption needs by our customers. This spending is affected by many factors, including, among others:

A downturn in either the national or local economy where our stores operate, or in the principal markets served by us, or changes in any of the other factors described above, could negatively impact sales at our stores, sales through our other selling channels, and the level of profitability of those stores and other selling channels.

This risk was demonstrated in 2015 and 2016. We have significant exposure to companies involved in the manufacture of capital goods and heavy equipment. In 2015, our business was impacted by lower commodity prices, including oil, lower corporate capital spending, and a strong U.S. dollar. These variables resulted in our manufacturing customers making less money, and when that happens they tend to cut back on spending which yields a slowdown in our business to those customers. These same dynamics carried into 2016.

Products manufactured in foreign countries may cease to be available, which could adversely affect our inventory levels and operating results. We obtain certain of our products, and our suppliers obtain certain of their products, from China, Taiwan, South Korea, Mexico, and other foreign countries. Our suppliers could discontinue selling products manufactured in foreign countries at any time for reasons that may or may not be in our control or our suppliers' control, including foreign government

regulations, domestic government regulations, political unrest, war, disruption or delays in shipments, changes in local economic conditions, or trade issues. Additionally, the shipment of goods from foreign countries could be delayed by container shipping companies encountering financial or other difficulties. Our operating results and inventory levels could suffer if we are unable to promptly replace a supplier or shipper who is unwilling or unable to satisfy our requirements with another supplier or shipper providing equally appealing products and services.

New trade policies could make sourcing product from overseas more difficult and/or more costly. We source a significant amount of the products we sell from outside of the United States, primarily Asia. This sourcing is both direct (through our wholly-owned, Asia-based subsidiary, FASTCO Trading Co., Ltd.) and indirect (from vendors that themselves procure product from international sources). Considerable political uncertainty has arisen in the United States that may result in changes in the trade policies that companies, such as Fastenal, have built their sourcing operations around. Should this occur, it may be difficult in light of: (1) the significant structural investments made over time, and (2) the absence of significant domestic fastener production for us to adjust our capabilities to the new policies in the short term, which could increase the difficulty and/or cost of sourcing foreign products. Such changes could adversely affect our ability to secure sufficient product to service our customers and/or adversely affect our cost of operating in a way that hurts our financial results.

Changes in energy costs and the cost of raw materials used in our products could impact our net sales, cost of sales, gross profit percentage, distribution expenses, and occupancy expenses, which may result in lower operating income. Costs of raw materials used in our products (e.g., steel) and energy costs have fluctuated during the last several years. Increases in these costs result in increased production costs for our suppliers. These suppliers typically look to pass their increased costs along to us through price increases. The fuel costs of our distribution and store operations have fluctuated as well. While we typically try to pass increased supplier prices and fuel costs through to our customers or to modify our activities to mitigate the impact, we may not be successful, particularly if supplier prices or fuel costs rise rapidly. Failure to fully pass any such increased prices and costs through to our customers or to modify our activities to mitigate the impact would have an adverse effect on our operating income. While increases in the cost of fuel or raw materials could be damaging to us, decreases in those costs, particularly if severe, could also adversely impact us by creating deflation in selling prices, which could cause our gross profit to deteriorate, or by negatively impacting customers in certain industries, which could cause our sales to those customers to decline.

The industrial, construction, and maintenance supply industry is consolidating, which could cause it to become more competitive and could negatively impact our market share, gross profit, and operating income. The industrial, construction, and maintenance supply industry in North America is consolidating. This consolidation is being driven by customer needs and supplier capabilities, which could cause the industry to become more competitive as greater economies of scale are achieved by suppliers, or as competitors with new business models are willing and able to operate with lower gross profit on select products. Customers are increasingly aware of the total costs of fulfillment and of the need to have consistent sources of supply at multiple locations. We believe these customer needs could result in fewer suppliers as the remaining suppliers become larger and capable of being a consistent source of supply.

There can be no assurance we will be able in the future to take advantage effectively of the trend toward consolidation. The trend in our industry toward consolidation could make it more difficult for us to maintain our current gross profit and operating income. Furthermore, as our industrial customers face increased foreign competition, and potentially lose business to foreign competitors or shift their operations overseas in an effort to reduce expenses, we may face increased difficulty in growing and maintaining our market share.

Inclement weather and other disruptions to the transportation network could adversely impact our distribution system and demand for our products. Our ability to provide efficient distribution of core business products to our store network is an integral component of our overall business strategy. Disruptions at distribution centers or shipping ports may affect our ability to both maintain core products in inventory and deliver products to our customers on a timely basis, which may in turn adversely affect our results of operations. In addition, severe weather conditions could adversely affect demand for our products in particularly hard hit regions.

Our current estimates of the market potential of our business strategies could be incorrect. Our strategies to grow our business include the opening of stores in new and existing markets and the expansion of our industrial vending business and Onsite locations. We currently estimate there is potential market opportunity in North America to support approximately 3,500 stores and that the potential market opportunity for industrial vending is approximately 1.7 million machines. We have also identified over 15,000 customer locations with the potential to implement our Onsite service model. These estimates are based on our business model today, and the introduction or expansion of other business strategies, such as on-line retailing, could cause them to change. In addition, the market potential of a particular business strategy may vary from expectations because of a change in the marketplace (such as changes in customer concentration or needs), a change in the nature of that business strategy, or weaker than anticipated acceptance by customers of that business strategy. We cannot guarantee that our market potential estimates are accurate or that we will decide to open stores or expand our industrial vending or Onsite service models to reach the full market opportunity. In particular, while we estimate we have the potential in North America for approximately

1,000 more stores than we have today, we have slowed our store openings in recent years and have focused instead on other growth drivers of our business.

We are exposed to foreign currency exchange rate risk, and changes in foreign exchange rates could increase our costs to procure products and impact our foreign sales. Because the functional currency related to most of our foreign operations is the applicable local currency, we are exposed to foreign currency exchange rate risk arising from transactions in the normal course of business. Fluctuations in the relative strength of foreign economies and their related currencies could adversely impact our ability to procure products overseas at competitive prices and our foreign sales. Historically, our primary exchange rate exposure has been with the Canadian dollar.

Tight credit markets could impact our ability to obtain financing on reasonable terms or increase the cost of existing or future financing. As of December 31, 2016, we had $390 million of outstanding debt obligations, including loans outstanding under our revolving credit facility (the 'Credit Facility') of $305 million and senior unsecured promissory notes issued under our master note agreement (the 'Master Note Agreement') in the aggregate principal amount of $75 million. Loans under the Credit Facility bear interest at a rate per annum based on the London Interbank Offered Rate ('LIBOR') and mature on March 1, 2018. The notes issued under our Master Note Agreement consist of two series. The first is in an aggregate principal amount of $40 million, bears interest at a fixed rate of 2.00% per annum, and is due and payable on July 20, 2021. The second is in an aggregate principal amount of $35 million, bears interest at a fixed rate of 2.45% per annum, and is due and payable on July 20, 2022. Our aggregate borrowing capacity under the Credit Facility is $700 million. Our aggregate borrowing capacity under the Master Note Agreement is $200 million; however none of the institutional investors party to that agreement are committed to purchase notes thereunder.

During periods of volatility and disruption in the United States credit markets, financing may become more costly and more difficult to obtain. Although the credit market turmoil of 2008 and 2009 did not have a significant adverse impact on our liquidity or borrowing costs given our low level of indebtedness at that time, the availability of funds tightened and credit spreads on corporate debt increased. Our indebtedness has increased significantly since 2009 and we have the capacity under our Credit Facility and Master Note Agreement to substantially increase borrowings in the future. If credit market volatility were to return, the cost of servicing our existing debt could increase due to the LIBOR-based interest rate provided for under our Credit Facility. In addition, borrowing additional amounts to finance stock purchases, dividends, capital expenditures, and other liquidity needs or to refinance our existing indebtedness could be difficult and the cost of doing so could be high.

For more information relating to borrowing and interest rates, see the following sections below: Cash Flow Impact Items – Liquidity and Capital Resources – Debt under the heading 'Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations', 'Item 7A. Quantitative and Qualitative Disclosures about Market Risks', and Note 9 of the Notes to Consolidated Financial Statements.

Investment Risk

We cannot provide any guaranty of future dividend payments or that we will continue to purchase shares of our common stock pursuant to our stock purchase program. Although our board of directors has historically authorized the payment of quarterly cash dividends on our common stock and indicated an intention to do so in the future, there are no assurances that we will continue to pay dividends in the future or continue to increase dividends at historic rates. In addition, although our board of directors has authorized share purchase programs and we purchased shares in 2016, 2015, and prior years through these programs, we may discontinue doing so at any time. Any decision to continue to pay quarterly dividends on our common stock, to increase those dividends, or to purchase our common stock in the future will be based upon our financial condition and results of operations, the price of our common stock, credit conditions, and such other factors as are deemed relevant by our board of directors.