RISK FACTORS

An investment in shares of our Class A common stock involves risks. You should carefully consider the following information about these risks, together with the other information contained in this prospectus, before investing in shares of our Class A common stock.

Risks Related to Our Industry and Our Business

Industry Risks

Our business depends on activity within the construction industry and the strength of the local economies in which we operate.

We sell most of our construction materials and products and provide all of our paving and related services to the construction industry, so our results are significantly affected by the strength of the construction industry. Demand for our products, particularly in the residential and nonresidential construction markets, could decline if companies and consumers cannot obtain credit for construction projects or if the slow pace of economic activity results in delays or cancellations of capital projects. In addition, federal and state budget issues may continue to hurt the funding available for infrastructure spending, particularly highway construction, which constitutes a significant portion of our business.

Our earnings depend on the strength of the local economies in which we operate because of the high cost to transport our products relative to their price. In recent years, many states have reduced their construction spending due to budget shortfalls resulting from lower tax revenue as well as uncertainty relating to long-term federal highway funding. As a result, there has been a reduction in many states’ investment in infrastructure spending. If economic and construction activity diminishes in one or more areas, particularly in our top revenue-generating markets of Texas, Kansas, Kentucky, Missouri and Utah, our results of operations and liquidity may be materially adversely affected, and there is no assurance that reduced levels of construction activity will not continue to affect our business in the future.

Our business is cyclical and requires significant working capital to fund operations.

Our business is cyclical and requires that we maintain significant working capital to fund our operations. Our ability to generate sufficient cash flow depends on future performance, which will be subject to general economic conditions, industry cycles and financial, business and other factors affecting our operations, many of which are beyond our control. If we are unable to generate sufficient cash to operate our business and service our outstanding debt and other obligations, we may be required, among other things, to further reduce or delay planned capital or operating expenditures, sell assets or take other measures, including the restructuring of all or a portion of our debt, which may only be available, if at all, on unsatisfactory terms.

Weather can materially affect our business, and we are subject to seasonality.

Nearly all of the products we sell and the services we provide are used or performed outdoors. Therefore, seasonal changes and other weather-related conditions can adversely affect our business and operations through a decline in both the use and production of our products and demand for our services. Adverse weather conditions such as extended rainy and cold weather in the spring and fall can reduce demand for our products and reduce sales or render our contracting operations less efficient. Major weather events such as hurricanes, tornadoes, tropical storms and heavy snows with quick rainy melts adversely could affect sales in the near term.

Heavy-side construction materials production and shipment levels follow activity in the construction industry, which typically occurs in the spring, summer and fall. Warmer and drier weather during the second and third quarters of our fiscal year typically result in higher activity and revenue levels during those quarters. The first quarter of our fiscal year has typically lower levels of activity due to the weather conditions. Our second quarter varies greatly with spring rains and wide temperature variations. A cool wet spring increases drying time on projects, which can delay sales in the second quarter, while a warm dry spring may enable earlier project startup.

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Our industry is capital intensive and we have significant fixed and semi-fixed costs. Therefore, our earnings are sensitive to changes in volume.

The property and machinery needed to produce our products can be very expensive. Therefore, we need to spend a substantial amount of capital to purchase and maintain the equipment necessary to operate our business. Although we believe that our current cash balance, along with our projected internal cash flows and our available financing resources, will provide sufficient cash to support our currently anticipated operating and capital needs, if we are unable to generate sufficient cash to purchase and maintain the property and machinery necessary to operate our business, we may be required to reduce or delay planned capital expenditures or incur additional debt. In addition, given the level of fixed and semi-fixed costs within our business, particularly at our cement production facility, decreases in volumes can negatively affect our financial position, results of operations and liquidity.

Within our local markets, we operate in a highly competitive industry.

The U.S. construction aggregates industry is highly fragmented with a large number of independent local producers in a number of our markets. Additionally, in most markets, we compete against large private and public infrastructure companies, some of which are also vertically-integrated. Therefore, there is intense competition in a number of the markets in which we operate. This significant competition could lead to lower prices, lower sales volumes and higher costs in some markets, negatively affecting our financial position, results of operations and liquidity. Further, the lack of availability of skilled labor, such as truck drivers, may require us to increase compensation or reduce deliveries, which could negatively affect our financial position, results of operations and liquidity.

Growth Risks

The success of our business depends, in part, on our ability to execute on our acquisition strategy, to successfully integrate acquisitions and to retain key employees of our acquired businesses.

A significant portion of our historical growth has occurred through acquisitions and we will likely enter into acquisitions in the future. We have evaluated and expect to continue to evaluate possible acquisition transactions on an ongoing basis. At any time we may be engaged in discussions or negotiations with respect to several possible acquisitions. From time to time we enter into letters of intent to allow us to conduct due diligence on a confidential basis. At any given time, we may be in preliminary discussions with several potential acquisition targets. There can be no assurance that we will enter into definitive agreements with respect to any contemplated transactions or that they will be completed. Our growth has placed, and will continue to place, significant demands on our management and operational and financial resources. Acquisitions involve risks that the businesses acquired will not perform as expected and that business judgments concerning the value, strengths and weaknesses of businesses acquired will prove incorrect.

Acquisitions may require integration of the acquired companies’ sales and marketing, distribution, engineering, purchasing, finance and administrative organizations. We may not be able to integrate successfully any business we may acquire or have acquired into our existing business and any acquired businesses may not be profitable or as profitable as we had expected. Our inability to complete the integration of new businesses in a timely and orderly manner could increase costs and lower profits. Factors affecting the successful integration of acquired businesses include, but are not limited to, the following:

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We cannot assure you that we will achieve synergies and cost savings in connection with acquisitions. In addition, many of the businesses that we have acquired and will acquire have unaudited financial statements that have been prepared by the management of such companies and have not been independently reviewed or audited. We cannot assure you that the financial statements of companies we have acquired or will acquire would not be materially different if such statements were audited. Finally, we cannot assure you that we will continue to acquire businesses at valuations consistent with our prior acquisitions or that we will complete future acquisitions at all. We cannot assure you that there will be attractive acquisition opportunities at reasonable prices, that financing will be available or that we can successfully integrate such acquired businesses into our existing operations. In addition, our results of operations from these acquisitions could, in the future, result in impairment charges for any of our intangible assets, including goodwill, or other long-lived assets, particularly if economic conditions worsen unexpectedly. These changes could materially negatively affect our results of operations, financial condition or liquidity.

Our long-term success is dependent upon securing and permitting aggregate reserves in strategically located areas. The inability to secure and permit such reserves could negatively affect our earnings in the future.

Aggregates are bulky and heavy and therefore difficult to transport efficiently. Because of the nature of the products, the freight costs can quickly surpass production costs. Therefore, except for geographic regions that do not possess commercially viable deposits of aggregates and are served by rail, barge or ship, the markets for our products tend to be very localized around our quarry sites and are served by truck. New quarry sites often take a number of years to develop. Our strategic planning and new site development must stay ahead of actual growth. Additionally, in a number of urban and suburban areas in which we operate, it is increasingly difficult to permit new sites or expand existing sites due to community resistance. Therefore, our future success is dependent, in part, on our ability to accurately forecast future areas of high growth in order to locate optimal facility sites and on our ability to either acquire existing quarries or secure operating and environmental permits to open new quarries. If we are unable to accurately forecast areas of future growth, acquire existing quarries or secure the necessary permits to open new quarries, our financial condition, results of operations and liquidity may be materially adversely affected.

Economic Risks

Our business relies on private investment in infrastructure, and a slower than expected recovery may adversely affect our results.

A significant portion of our sales are for projects with non-public owners. Construction spending is affected by developers’ ability to finance projects. The credit environment has negatively affected the U.S. economy and demand for our products in recent years. Residential and nonresidential construction could decline if companies and consumers are unable to finance construction projects or if an economic recovery is stalled, which could result in delays or cancellations of capital projects. If housing starts and nonresidential projects do not rise steadily with the economic recovery as they historically have when recessions end, sale of our construction materials, downstream products and paving and related services may decline and our financial position, results of operations and liquidity may be materially adversely affected.

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A decline in public infrastructure construction and reductions in governmental funding could adversely affect our operations and results.

A significant portion of our revenue is generated from publicly-funded construction projects. As a result, if publicly-funded construction decreases due to reduced federal or state funding or otherwise, our results of operations and liquidity could be negatively affected.

In January 2011, the U.S. House of Representatives passed a new rules package that repealed a transportation law dating back to 1998, which protected annual funding levels from amendments that could reduce such funding. This rule change subjects funding for highways to yearly appropriation reviews. The change in the funding mechanism increases the uncertainty of many state departments of transportation regarding funds for highway projects. This uncertainty could result in states being reluctant to undertake large multi-year highway projects which could, in turn, negatively affect our sales. Moving Ahead for Progress in the 21st Century (“MAP-21”), the existing federal transportation funding program, expired on September 30, 2014, and we are uncertain as to the size and term of the transportation funding program that will follow.

As a result of the foregoing and other factors, we cannot be assured of the existence, amount and timing of appropriations for spending on federal, state or local projects. Federal support for the cost of highway maintenance and construction is dependent on congressional action. In addition, each state funds its infrastructure spending from specially allocated amounts collected from various taxes, typically gasoline taxes and vehicle fees, along with voter-approved bond programs. Shortages in state tax revenues can reduce the amounts spent on state infrastructure projects, even below amounts awarded under legislative bills. In recent years, nearly all states have experienced state-level funding pressures caused by lower tax revenues and an inability to finance approved projects. Delays or cancellations of state infrastructure spending could negatively affect our financial position, results of operations and liquidity because a significant portion of our business is dependent on state infrastructure spending.

Environmental, health and safety laws and regulations and any changes to, or liabilities arising under, such laws and regulations could have a material adverse effect on our business, financial condition, results of operations and liquidity.

We are subject to a variety of federal, state and local laws and regulations relating to, among other things: (i) the release or discharge of materials into the environment; (ii) the management, use, generation, treatment, processing, handling, storage, transport or disposal of hazardous materials, including the management of hazardous waste used as a fuel substitute at our cement kiln in Hannibal, Missouri; and (iii) the protection of public and employee health and safety and the environment. These laws and regulations impose strict liability in some cases without regard to negligence or fault and expose us to liability for the environmental condition of our currently or formerly owned or operated facilities or third-party waste disposal sites, and may expose us to liability for the conduct of others or for our actions, even if such actions complied with all applicable laws at the time these actions were taken. In particular, we may incur remediation costs and other related expenses because our facilities were constructed and operated before the adoption of current environmental laws and the institution of compliance practices or because certain of our processes are regulated. These laws and regulations may also expose us to liability for claims of personal injury or property or natural resource damage related to alleged exposure to, or releases of, regulated or hazardous materials. The existence of contamination at properties we own, lease or operate could also result in increased operational costs or restrictions on our ability to use those properties as intended, including for purposes of mining.

Despite our compliance efforts, there is an inherent risk of liability in the operation of our business, especially from an environmental standpoint, or from time to time, we may be in noncompliance with environmental, health and safety laws and regulations. These potential liabilities or noncompliances could have an adverse effect on our operations and profitability. In many instances, we must have government approvals, certificates, permits or licenses in order to conduct our business, which often require us to make significant capital, operating and maintenance expenditures to comply with environmental, health and safety laws and

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regulations. Our failure to obtain and maintain required approvals, certificates, permits or licenses or to comply with applicable governmental requirements could result in sanctions, including substantial fines or possible revocation of our authority to conduct some or all of our operations. Governmental requirements that affect our operations also include those relating to air and water quality, waste management, asset reclamation, the operation and closure of municipal waste and construction and demolition debris landfills, remediation of contaminated sites and worker health and safety. These requirements are complex and subject to frequent change. Stricter laws and regulations, more stringent interpretations of existing laws or regulations or the future discovery of environmental conditions may impose new liabilities on us, reduce operating hours, require additional investment by us in pollution control equipment or impede our opening new or expanding existing plants or facilities. We have incurred, and may in the future incur, significant capital and operating expenditures to comply with such laws and regulations. The cost of complying with such laws could have a material adverse effect on our business, financial condition, results of operations and liquidity. In addition, we have recorded liabilities in connection with our reclamation and landfill closure obligations, but there can be no assurances that the costs of our obligations will not exceed our accruals.

Financial Risks

Difficult and volatile conditions in the credit markets could affect our financial position, results of operations and liquidity.

Demand for our products is primarily dependent on the overall health of the economy, and federal, state and local public infrastructure funding levels. A stagnant or declining economy tends to produce less tax revenue for public infrastructure agencies, thereby decreasing a source of funds available for spending on public infrastructure improvements, which constitute a significant part of our business.

With the slow pace of economic recovery, there is also a likelihood that we will not be able to collect on certain of our accounts receivable from our customers. Although we are protected in part by payment bonds posted by some of our customers, we have experienced payment delays and defaults from some of our customers during the recent economic downturn and subsequent slow recovery. Such delays and defaults could have a material effect on our financial position, results of operations or liquidity.

If we are unable to accurately estimate the overall risks, requirements or costs when we bid on or negotiate contracts that are ultimately awarded to us, we may achieve lower than anticipated profits or incur contract losses.

Even though the majority of our governmental contracts contain certain raw material escalators to protect us from certain price increases, a portion or all of the contracts are often on a fixed cost basis. Pricing on a contract with a fixed unit price is based on approved quantities irrespective of our actual costs and contracts with a fixed total price require that the total amount of work be performed for a single price irrespective of our actual costs. We realize a profit on our contracts only if our revenue exceeds actual costs, which requires that we successfully estimate our costs and then successfully control actual costs and avoid cost overruns. If our cost estimates for a contract are inadequate, or if we do not execute the contract within our cost estimates, then cost overruns may cause us to incur a loss or cause the contract not to be as profitable as we expected. The costs incurred and gross profit realized, if any, on our contracts can vary, sometimes substantially, from our original projections due to a variety of factors, including, but not limited to:

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These factors, as well as others, may cause us to incur losses, which could negatively affect our financial position, results of operations and liquidity.

We may incur material costs and losses as a result of claims that our products do not meet regulatory requirements or contractual specifications.

We provide our customers with products designed to meet building code or other regulatory requirements and contractual specifications for measurements such as durability, compressive strength, weight-bearing capacity and other characteristics. If we fail or are unable to provide products meeting these requirements and specifications, material claims may arise against us and our reputation could be damaged. Additionally, if a significant uninsured, non-indemnified or product-related claim is resolved against us in the future, that resolution could have a material adverse effect on our financial condition, results of operations and liquidity.

The cancellation of a significant number of contracts or our disqualification from bidding for new contracts could have a material adverse effect on our financial position, results of operations and liquidity.

Contracts that we enter into with governmental entities can usually be canceled at any time by them with payment only for the work already completed. In addition, we could be prohibited from bidding on certain governmental contracts if we fail to maintain qualifications required by those entities. A cancellation of an unfinished contract or our disqualification from the bidding process could result in lost revenue and cause our equipment to be idled for a significant period of time until other comparable work becomes available, which could have a material adverse effect on our financial condition, results of operations and liquidity.

Our operations are subject to special hazards that may cause personal injury or property damage, subjecting us to liabilities and possible losses which may not be covered by insurance.

Operating hazards inherent in our business, some of which may be outside our control, can cause personal injury and loss of life, damage to or destruction of property, plant and equipment and environmental damage. We maintain insurance coverage in amounts and against the risks we believe are consistent with industry practice, but this insurance may not be adequate or available to cover all losses or liabilities we may incur in our operations. Our insurance policies are subject to varying levels of deductibles. Losses up to our deductible amounts are accrued based upon our estimates of the ultimate liability for claims incurred and an estimate of

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claims incurred but not reported. However, liabilities subject to insurance are difficult to assess and estimate due to unknown factors, including the severity of an injury, the determination of our liability in proportion to other parties, the number of incidents not reported and the effectiveness of our safety programs. If we were to experience insurance claims or costs above our estimates, we might also be required to use working capital to satisfy these claims rather than using working capital to maintain or expand our operations.

Unexpected factors affecting self-insurance claims and reserve estimates could adversely affect our business.

We use a combination of third-party insurance and self-insurance to provide for potential liabilities for workers’ compensation, general liability, vehicle accident, property and medical benefit claims. Although we believe we have minimized our exposure on individual claims, for the benefit of costs savings we have accepted the risk of a large amount of independent multiple material claims arising, which could have a significant effect on our earnings. We estimate the projected losses and liabilities associated with the risks retained by us, in part, by considering historical claims experience, demographic and severity factors and other actuarial assumptions which, by their nature, are subject to a high degree of variability. Among the causes of this variability are unpredictable external factors affecting future inflation rates, discount rates, litigation trends, legal interpretations, benefit level changes and claim settlement patterns. Any such matters could have a material adverse effect on our financial condition, results of operations and liquidity.

Risks Related to Our Indebtedness

Our substantial leverage could adversely affect our financial condition, our ability to raise additional capital to fund our operations, our ability to operate our business, our ability to react to changes in the economy or our industry and pay our debts and could divert our cash flow from operations to debt payments.

We are highly leveraged. As of September 27, 2014 our total debt was approximately $1,091.1 million. Our high degree of leverage could have important consequences, including:

We are a holding company, and our consolidated assets are owned by, and our business is conducted through, our subsidiaries. Revenues from these subsidiaries are our primary source of funds for debt payments and operating expenses. If our subsidiaries are restricted from making distributions to us, that may impair our ability to meet our debt service obligations or otherwise fund our operations. Moreover, there may be restrictions on payments by subsidiaries to their parent companies under applicable laws, including laws that require companies to maintain minimum amounts of capital and to make payments to stockholders only from profits. As a result, although a subsidiary of ours may have cash, we may not be able to obtain that cash to satisfy our obligation to service our outstanding debt or fund our operations.

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Certain of our debt agreements impose significant operating and financial restrictions on us and our subsidiaries, which may prevent us from capitalizing on business opportunities.

The indenture that governs our senior notes and the credit agreement that governs our senior secured credit facilities impose significant operating and financial restrictions on us. These restrictions will limit our ability and/or the ability of our subsidiaries to, among other things:

As a result of these restrictions, we are limited as to how we conduct our business and we may be unable to raise additional debt or equity financing to compete effectively or to take advantage of new business opportunities. The terms of any future indebtedness we may incur could include more restrictive covenants. We cannot assure you that we will be able to maintain compliance with these covenants in the future and, if we fail to do so, that we will be able to obtain waivers from the lenders and/or amend the covenants.

Our failure to comply with the restrictive covenants described above as well as other terms of our other indebtedness and/or the terms of any future indebtedness from time to time could result in an event of default, which, if not cured or waived, could result in our being required to repay these borrowings before their due date. If we are forced to refinance these borrowings on less favorable terms or are unable to refinance these borrowings, our results of operations and financial condition could be adversely affected.

Servicing our indebtedness will require a significant amount of cash. Our ability to generate sufficient cash depends on many factors, some of which are not within our control.

Our ability to make payments on our indebtedness and to fund planned capital expenditures will depend on our ability to generate cash in the future. To a certain extent, this is subject to general economic, financial, competitive, legislative, regulatory and other factors that are beyond our control. If we are unable to generate sufficient cash flow to service our debt and meet our other commitments, we may need to restructure or refinance all or a portion of our debt, sell material assets or operations or raise additional debt or equity capital. We may not be able to effect any of these actions on a timely basis, on commercially reasonable terms or at all, and these actions may not be sufficient to meet our capital requirements. In addition, the terms of our existing or future debt arrangements may restrict us from effecting any of these alternatives.

Despite our current level of indebtedness, we may still be able to incur substantially more debt. This could further exacerbate the risks to our financial condition described above.

We may be able to incur significant additional indebtedness in the future. Although the indenture governing our senior notes and the credit agreement governing our senior secured credit facilities contain restrictions on the incurrence of additional indebtedness, these restrictions are subject to a number of qualifications and exceptions, and we could incur substantial additional indebtedness in compliance with these restrictions. If we incur any

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additional indebtedness that ranks equally with the notes, subject to collateral arrangements, the holders of that debt will be entitled to share ratably with you in any proceeds distributed in connection with any insolvency, liquidation, reorganization, dissolution or other winding up of our company. These restrictions also will not prevent us from incurring obligations that do not constitute indebtedness. Our senior secured credit facilities include an uncommitted incremental facility that will allow us the option to increase the amount available under the term loan facility and/or the senior secured revolving credit facility by (i) $135.0 million plus (ii) an additional amount so long as we are in pro forma compliance with a consolidated first lien net leverage ratio. Availability of such incremental facilities will be subject to, among other conditions, the absence of an event of default and pro forma compliance with the financial covenants under our credit agreement and the receipt of commitments by existing or additional financial institutions.

Other Risks

Our success is dependent on our Chief Executive Officer and other key personnel.

Our success depends on the continuing services of our Chief Executive Officer, Mr. Tom Hill, and other key personnel. We believe that Mr. Hill possesses valuable knowledge and skills that are crucial to our success and would be very difficult to replicate. Our senior management team was assembled under the leadership of Mr. Hill. The team was assembled with a view towards substantial growth, and the size and aggregate compensation of the team increased substantially. The associated significant increase in overhead expense could decrease our margins if we fail to grow substantially. Not all of our senior management team resides near or works at our headquarters. The geographic distance of the members of our senior management team may impede the team’s ability to work together effectively. Our success will depend, in part, on the efforts and abilities of our senior management and their ability to work together. We cannot assure you that they will be able to do so.

Over time, our success will depend on attracting and retaining qualified personnel. Competition for senior management is intense, and we may not be able to retain our management team or attract additional qualified personnel. The loss of a member of senior management would require our remaining senior officers to divert immediate attention, which could be substantial or require costly external resources in the short term to fulfilling. The inability to adequately fill vacancies in our senior executive positions on a timely basis could negatively affect our ability to implement our business strategy, which could adversely affect our results of operations and prospects.

We use large amounts of electricity, diesel fuel, liquid asphalt and other petroleum-based resources that are subject to potential reliability issues, supply constraints and significant price fluctuation, which could affect our financial position, operating results and liquidity.

In our production and distribution processes, we consume significant amounts of electricity, diesel fuel, liquid asphalt and other petroleum-based resources. The availability and pricing of these resources are subject to market forces that are beyond our control. Furthermore, we are vulnerable to any reliability issues experienced by our suppliers, which also are beyond our control. Our suppliers contract separately for the purchase of such resources and our sources of supply could be interrupted should our suppliers not be able to obtain these materials due to higher demand or other factors that interrupt their availability. Variability in the supply and prices of these resources could materially affect our financial position, results of operations and liquidity from period to period.

Climate change and climate change legislation or regulations may adversely affect our business.

A number of governmental bodies have introduced or are contemplating legislative and regulatory changes in response to the potential effects of climate change. Such legislation or regulation has and potentially could include provisions for a “cap and trade” system of allowances and credits, among other provisions. The EPA promulgated a mandatory reporting rule covering greenhouse gas emissions from sources considered to be large emitters. The EPA has also promulgated a greenhouse gas emissions permitting rule, referred to as the “Tailoring

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Rule” which sets forth criteria for determining which facilities are required to obtain permits for greenhouse gas (“GHG”) emissions pursuant to the U.S. Clean Air Act’s Prevention of Significant Deterioration (“PSD”) and Title V operating permit programs. The U.S. Supreme Court ruled in June 2014 that the EPA exceeded its statutory authority in issuing the Tailoring Rule but upheld the Best Available Control Technology (“BACT”) requirements for GHGs emitted by sources already subject to PSD requirements for other pollutants. Our cement plant and one of our landfills hold Title V Permits. If future modifications to our facilities require PSD review for other pollutants, GHG BACT requirements may also be triggered, which could require significant additional costs.

Other potential effects of climate change include physical effects such as disruption in production and product distribution as a result of major storm events and shifts in regional weather patterns and intensities. There is also a potential for climate change legislation and regulation to adversely affect the cost of purchased energy and electricity.

The effects of climate change on our operations are highly uncertain and difficult to estimate. However, because a chemical reaction inherent to the manufacture of Portland cement releases carbon dioxide, a GHG, cement kiln operations may be disproportionately affected by future regulation of GHGs. Climate change and legislation and regulation concerning GHGs could have a material adverse effect on our financial condition, results of operations and liquidity.

As an “emerging growth company” under the JOBS Act, we are permitted to, and intend to, rely on exemptions from certain disclosure requirements.

As an “emerging growth company” under the JOBS Act, we are permitted to, and intend to, rely on exemptions from certain disclosure requirements. We will cease to be an emerging growth company upon the earliest of: (1) the end of the fiscal year following the fifth anniversary of this offering; (2) the last day of the first fiscal year during which our annual gross revenues were $1.0 billion or more; (3) the date on which we have, during the previous three-year period, issued more than $1.0 billion in non-convertible debt securities; or (4) the end of any fiscal year in which the market value of our common stock held by non-affiliates exceeded $700 million as of the end of the second quarter of that fiscal year.

For so long as we remain an “emerging growth company,” we will not be required to, among other things:

We have not taken advantage of all of these reduced reporting burdens in this prospectus, although we may do so in future filings with the SEC. The specific implications for us of the JOBS Act are still subject to interpretations and guidance by the SEC and other regulatory agencies. In addition, as our business grows, we may cease to satisfy the conditions of an “emerging growth company.” We are currently evaluating and monitoring developments with respect to these new rules and we cannot assure you that we will be able to take advantage of all of the benefits from the JOBS Act.

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In addition, as an “emerging growth company,” we may elect to delay adoption of new or revised accounting standards applicable to public companies until such standards are made applicable to private companies. As a result, our financial statements may not be comparable to the financial statements of issuers who are required to comply with the effective dates for new or revised accounting standards that are applicable to public companies.

We are dependent on information technology. Our systems and infrastructure face certain risks, including cyber security risks and data leakage risks.

We are dependent on information technology systems and infrastructure. Any significant breakdown, invasion, destruction or interruption of these systems by employees, others with authorized access to our systems, or unauthorized persons could negatively affect operations. There is also a risk that we could experience a business interruption, theft of information or reputational damage as a result of a cyber attack, such as an infiltration of a data center, or data leakage of confidential information either internally or at our third-party providers. While we have invested in the protection of our data and information technology to reduce these risks and periodically test the security of our information systems network, there can be no assurance that our efforts will prevent breakdowns or breaches in our systems that could adversely affect our financial condition, results of operations and liquidity.

Labor disputes could disrupt operations of our businesses.

As of September 27, 2014, labor unions represented approximately 5.5% of our total employees, substantially all at Continental Cement. Our collective bargaining agreements for employees generally expire between 2015 and 2018. Although we believe we have good relations with our employees and unions, disputes with our trade unions, or the inability to renew our labor agreements, could lead to strikes or other actions that could disrupt our operations, raise costs, and reduce revenue and earnings in the affected locations.

Risks Related to Our Organizational Structure

Summit Materials, Inc.’s only material asset after completion of this offering will be its interest in Summit Holdings, and it is accordingly dependent upon distributions from Summit Holdings to pay taxes, make payments under the tax receivable agreement and pay dividends.

Summit Materials, Inc. will be a holding company and will have no material assets other than its ownership of LP Units. Summit Materials has no independent means of generating revenue. Summit Materials, Inc. intends to cause Summit Holdings to make distributions to holders of LP Units in an amount sufficient to cover all applicable taxes at assumed tax rates, payments under the tax receivable agreement and dividends, if any, declared by it. Deterioration in the financial condition, earnings or cash flow of Summit Holdings and its subsidiaries for any reason could limit or impair their ability to pay such distributions. Additionally, to the extent that Summit Materials, Inc. needs funds, and Summit Holdings is restricted from making such distributions under applicable law or regulation or under the terms of our financing arrangements, or is otherwise unable to provide such funds, it could materially adversely affect our liquidity and financial condition.

Payments of dividends, if any, will be at the discretion of our board of directors after taking into account various factors, including our business, operating results and financial condition, current and anticipated cash needs, plans for expansion and any legal or contractual limitations on our ability to pay dividends. Any financing arrangement that we enter into in the future may include restrictive covenants that limit our ability to pay dividends. In addition, Summit Holdings is generally prohibited under Delaware law from making a distribution to a limited partner to the extent that, at the time of the distribution, after giving effect to the distribution, liabilities of Summit Holdings (with certain exceptions) exceed the fair value of its assets. Subsidiaries of Summit Holdings are generally subject to similar legal limitations on their ability to make distributions to Summit Holdings.

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Summit Materials, Inc. will be required to pay exchanging holders of LP Units and certain other indirect pre-IPO owners for most of the benefits relating to any additional tax depreciation or amortization deductions that we may claim as a result of the tax basis step-up we receive in connection with sales or exchanges of LP Units and related transactions and our utilization of certain net operating losses of the Investor Entities.

Holders of LP Units (other than Summit Materials, Inc.) may, subject to the vesting and minimum retained ownership requirements and transfer restrictions applicable to such holders as set forth in the limited partnership agreement of Summit Holdings, from and after the first anniversary of the date of the completion of this offering (subject to the terms of the exchange agreement), exchange their LP Units for Class A common stock on a one-for-one basis. Notwithstanding the foregoing, Blackstone is generally permitted to exchange LP Units at any time. The exchanges are expected to result in increases in the tax basis of the tangible and intangible assets of Summit Holdings. These increases in tax basis may increase (for tax purposes) depreciation and amortization deductions and therefore reduce the amount of tax that Summit Materials, Inc. would otherwise be required to pay in the future, although the Internal Revenue Service (the “IRS”) may challenge all or part of the tax basis increase, and a court could sustain such a challenge.

Prior to the completion of this offering, we will enter into a tax receivable agreement with the holders of LP Units that provides for the payment by Summit Materials, Inc. to exchanging holders of LP Units and certain other indirect pre-IPO owners of 85% of the benefits, if any, that Summit Materials, Inc. is deemed to realize as a result of (i) the increases in tax basis described above and (ii) our utilization of certain net operating losses of the Investor Entities and certain other tax benefits related to entering into the tax receivable agreement, including tax benefits attributable to payments under the tax receivable agreement. This payment obligation is an obligation of Summit Materials, Inc. and not of Summit Holdings. While the actual increase in tax basis and the actual amount and utilization of net operating losses, as well as the amount and timing of any payments under the tax receivable agreement, will vary depending upon a number of factors, including the timing of exchanges, the price of shares of our Class A common stock at the time of the exchange, the extent to which such exchanges are taxable and the amount and timing of our income, we expect that as a result of the size of the transfers and increases in the tax basis of the tangible and intangible assets of Summit Holdings and our possible utilization of net operating losses, the payments that Summit Materials, Inc. may make under the tax receivable agreement will be substantial. The payments under the tax receivable agreement are not conditioned upon continued ownership of us by the holders of LP Units. See “Certain Relationships and Related Person Transactions—Tax Receivable Agreement.”

In certain cases, payments under the tax receivable agreement may be accelerated and/or significantly exceed the actual benefits Summit Materials, Inc. realizes in respect of the tax attributes subject to the tax receivable agreement.

The tax receivable agreement provides that upon certain changes of control, or if, at any time, Summit Materials, Inc. elects an early termination of the tax receivable agreement, Summit Materials, Inc.’s obligations under the tax receivable agreement would be calculated by reference to the present value (at a discount rate equal to one year LIBOR plus 100 basis points) of all future payments that holders of LP Units or other recipients would have been entitled to receive under the tax receivable agreement using certain valuation assumptions, including that Summit Materials, Inc. will have sufficient taxable income to fully utilize the deductions arising from the tax deductions, tax basis and other tax attributes subject to the tax receivable agreement and sufficient taxable income to fully utilize any remaining net operating losses subject to the tax receivable agreement on a straight line basis over the shorter of the statutory expiration period for such net operating losses or the five-year period after the early termination or change of control. In the case of an early termination election by Summit Materials, Inc., such payments will be calculated assuming that all unexchanged LP units were exchanged at the time of such election. Our obligations under the tax receivable agreement in such circumstance, in the case of a change of control, applies to previously exchanged or acquired LP Units and in the case of an early termination election, to all LP Units. In addition, holders of LP Units will not reimburse us for any payments previously made under the tax receivable agreement if such tax basis increase and our utilization of certain net operating

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losses is successfully challenged by the IRS (although any such detriment would be taken into account in calculating future payments under the tax receivable agreement). Summit Materials, Inc.’s ability to achieve benefits from any tax basis increase or net operating losses, and the payments to be made under the tax receivable agreement, will depend upon a number of factors, including the timing and amount of our future income. As a result, even in the absence of a change of control or an election to terminate the tax receivable agreement payments under the tax receivable agreement could be in excess of 85% of Summit Materials, Inc.’s actual cash tax savings.

Accordingly, it is possible that, with respect to a particular year, the actual cash tax savings realized by Summit Materials, Inc. may be less than the corresponding tax receivable agreement payments or that payments under the tax receivable agreement may be made years in advance of the actual realization, if any, of the anticipated future tax benefits. Depending on our ability to take such detriments into account in making future payments, there may be a material negative effect on our liquidity if the payments under the tax receivable agreement exceed the actual cash tax savings that Summit Materials realizes in respect of the tax attributes subject to the tax receivable agreement and/or distributions to Summit Materials, Inc. by Summit Holdings are not sufficient to permit Summit Materials, Inc. to make payments under the tax receivable agreement after it has paid taxes and other expenses. Based upon certain assumptions described in greater detail below under “Certain Relationships and Related Person Transactions—Tax Receivable Agreement,” we estimate that if Summit Materials, Inc. were to exercise its termination right immediately following this offering, the aggregate amount of these termination payments would be approximately $         million. The foregoing number is merely an estimate and the actual payments could differ materially. We may need to incur debt to finance payments under the tax receivable agreement to the extent our cash resources are insufficient to meet our obligations under the tax receivable agreement as a result of timing discrepancies or otherwise.

Risks Related to this Offering and Ownership of Our Class A Common Stock

Blackstone and its affiliates control us and their interests may conflict with ours or yours in the future.

Immediately following this offering, Blackstone and its affiliates will hold         % of the combined voting power of our Class A and Class B common stock (or         % if the underwriters exercise in full their option to purchase additional shares of Class A common stock). Moreover, under our bylaws and the stockholders’ agreement with Blackstone and its affiliates that will be in effect by the completion of this offering, for so long as our existing owners and their affiliates retain significant ownership of us, we will agree to nominate to our board individuals designated by Blackstone, whom we refer to as the “Sponsor Directors.” Even when Blackstone and its affiliates cease to own shares of our stock representing a majority of the total voting power, for so long as Blackstone continues to own a significant percentage of our stock Blackstone will still be able to significantly influence the composition of our board of directors and the approval of actions requiring stockholder approval through its voting power. Accordingly, for such period of time, Blackstone will have significant influence with respect to our management, business plans and policies, including the appointment and removal of our officers. In particular, for so long as Blackstone continues to own a significant percentage of our stock, Blackstone will be able to cause or prevent a change of control of our company or a change in the composition of our board of directors and could preclude any unsolicited acquisition of our company. The concentration of ownership could deprive you of an opportunity to receive a premium for your shares of Class A common stock as part of a sale of our company and ultimately might affect the market price of our Class A common stock.

Blackstone and its affiliates engage in a broad spectrum of activities. In the ordinary course of their business activities, Blackstone and its affiliates may engage in activities where their interests conflict with our interests or those of our stockholders. Our amended and restated certificate of incorporation will provide that none of Blackstone, any of its affiliates or any director who is not employed by us (including any non-employee director who serves as one of our officers in both his director and officer capacities) or his or her affiliates will have any duty to refrain from engaging, directly or indirectly, in the same business activities or similar business activities or lines of business in which we operate. Blackstone also may pursue acquisition opportunities that may be complementary to our business, and, as a result, those acquisition opportunities may not be available to us. In

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addition, Blackstone may have an interest in us pursuing acquisitions, divestitures and other transactions that, in its judgment, could enhance its investment, even though such transactions might involve risks to you.

Upon the listing of our shares of Class A common stock on the NYSE, we will be a “controlled company” within the meaning of NYSE rules and, as a result, will qualify for, and intend to rely on, exemptions from certain corporate governance requirements. You will not have the same protections afforded to stockholders of companies that are subject to such requirements.

After completion of this offering, affiliates of Blackstone will continue to control a majority of the combined voting power of all classes of our stock entitled to vote generally in the election of directors. As a result, we will be a “controlled company” within the meaning of the corporate governance standards of the NYSE. Under these rules, a company of which more than 50% of the voting power in the election of directors is held by an individual, group or another company is a “controlled company” and may elect not to comply with certain corporate governance requirements, including the requirements that, within one year of the date of the listing of our Class A common stock:

Following this offering, we intend to utilize these exemptions. As a result, we do not expect that a majority of the directors on our board will be independent upon completion of this offering. In addition, we do not expect that any of the committees of the board will consist entirely of independent directors. Accordingly, you will not have the same protections afforded to stockholders of companies that are subject to all of the corporate governance requirements of the NYSE.

We will incur increased costs and become subject to additional regulations and requirements as a result of becoming a public company, which could lower our profits or make it more difficult to run our business.

As a public company, we will incur significant legal, accounting and other expenses that we have not incurred as a private company, including costs associated with public company reporting requirements. We also have incurred and will incur costs associated with the Sarbanes-Oxley Act of 2002 (“Sarbanes-Oxley Act”), and related rules implemented by the SEC and the NYSE. The expenses incurred by public companies generally for reporting and corporate governance purposes have been increasing. We expect these rules and regulations to increase our legal and financial compliance costs and to make some activities more time-consuming and costly, although we are currently unable to estimate these costs with any degree of certainty. These laws and regulations also could make it more difficult or costly for us to obtain certain types of insurance, including director and officer liability insurance, and we may be forced to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. These laws and regulations could also make it more difficult for us to attract and retain qualified persons to serve on our board of directors, our board committees or as our executive officers. Furthermore, if we are unable to satisfy our obligations as a public company, we could be subject to delisting of our Class A common stock, fines, sanctions and other regulatory action and potentially civil litigation.

If we are unable to implement and maintain effective internal control over financial reporting in the future, investors may lose confidence in the accuracy and completeness of our financial reports and the market price of our Class A common stock may be negatively affected.

As a public company, we will be required to maintain internal controls over financial reporting and to report any material weaknesses in such internal controls. In addition, beginning with our second annual report on

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Form 10-K, we expect we will be required to furnish a report by management on the effectiveness of our internal control over financial reporting, pursuant to Section 404 of the Sarbanes-Oxley Act. Our independent registered public accounting firm is not required to express an opinion as to the effectiveness of our internal control over financial reporting until after we are no longer an “emerging growth company,” as defined in the JOBS Act. At such time, however, our independent registered public accounting firm may issue a report that is adverse in the event it is not satisfied with the level at which our internal control over financial reporting is documented, designed or operating.

The process of designing, implementing, and testing the internal control over financial reporting required to comply with this obligation is time consuming, costly, and complicated. If we identify material weaknesses in our internal control over financial reporting, if we are unable to comply with the requirements of Section 404 of the Sarbanes-Oxley Act in a timely manner or to assert that our internal control over financial reporting is effective, or if our independent registered public accounting firm is unable to express an opinion as to the effectiveness of our internal control over financial reporting once we are no longer an “emerging growth company,” investors may lose confidence in the accuracy and completeness of our financial reports and the market price of our Class A common stock could be negatively affected, and we could become subject to investigations by the stock exchange on which our securities are listed, the SEC, or other regulatory authorities, which could require additional financial and management resources.

There may not be an active trading market for shares of our Class A common stock, which may cause shares of our Class A common stock to trade at a discount from the initial offering price and make it difficult to sell the shares of Class A common stock you purchase.

Prior to this offering, there has not been a public trading market for shares of our Class A common stock. It is possible that after this offering, an active trading market will not develop or continue or, if developed, that any market will not be sustained, which would make it difficult for you to sell your shares of Class A common stock at an attractive price or at all. The initial public offering price per share of Class A common stock was determined by agreement among us and the representatives of the underwriters, and may not be indicative of the price at which shares of our Class A common stock will trade in the public market after this offering.

The market price of shares of our Class A common stock may be volatile, which could cause the value of your investment to decline.

Even if a trading market develops, the market price of our Class A common stock may be highly volatile and could be subject to wide fluctuations. Securities markets worldwide experience significant price and volume fluctuations. This market volatility, as well as general economic, market or political conditions, could reduce the market price of shares of our Class A common stock regardless of our operating performance. In addition, our operating results could be below the expectations of public market analysts and investors due to a number of potential factors, including variations in our quarterly operating results or dividends, if any, to stockholders, additions or departures of key management personnel, failure to meet analysts’ earnings estimates, publication of research reports about our industry, litigation and government investigations, changes or proposed changes in laws or regulations or differing interpretations or enforcement thereof affecting our business, adverse market reaction to any indebtedness we may incur or securities we may issue in the future, changes in market valuations of similar companies or speculation in the press or investment community, announcements by our competitors of significant contracts, acquisitions, dispositions, strategic partnerships, joint ventures or capital commitments, adverse publicity about the industries we participate in or individual scandals, and in response the market price of shares of our Class A common stock could decrease significantly. You may be unable to resell your shares of Class A common stock at or above the initial public offering price.

In the past few years, stock markets have experienced extreme price and volume fluctuations. In the past, following periods of volatility in the overall market and the market price of a company’s securities, securities class action litigation has often been instituted against these companies. Such litigation, if instituted against us, could result in substantial costs and a diversion of our management’s attention and resources.

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Because we have no current plans to pay cash dividends on our Class A common stock, you may not receive any return on investment unless you sell your Class A common stock for a price greater than that which you paid for it.

We have no current plans to pay any cash dividends. The declaration, amount and payment of any future dividends on shares of Class A common stock will be at the sole discretion of our board of directors. Our board of directors may take into account general and economic conditions, our financial condition and results of operations, our available cash and current and anticipated cash needs, capital requirements, contractual, legal, tax and regulatory restrictions and implications on the payment of dividends by us to our stockholders or by our subsidiaries to us and such other factors as our board of directors may deem relevant. In addition, our ability to pay dividends is limited by our senior secured credit facility and our senior notes and may be limited by covenants of other indebtedness we or our subsidiaries incur in the future. As a result, you may not receive any return on an investment in our Class A common stock unless you sell our Class A common stock for a price greater than that which you paid for it.

Investors in this offering will experience immediate and substantial dilution.

The initial public offering price per share of Class A common stock will be substantially higher than our pro forma net tangible book deficit per share immediately after this offering. As a result, you will pay a price per share of Class A common stock that substantially exceeds the per share book value of our tangible assets after subtracting our liabilities. In addition, you will pay more for your shares of Class A common stock than the amounts paid for the LP Units by our pre-IPO owners. Assuming an offering price of $         per share of Class A common stock, which is the midpoint of the range on the front cover of this prospectus, you will incur immediate and substantial dilution in an amount of $         per share of Class A common stock. See “Dilution.”

You may be diluted by the future issuance of additional Class A common stock in connection with our incentive plans, acquisitions or otherwise.

After this offering we will have approximately             shares of Class A common stock authorized but unissued, including approximately             shares of Class A common stock issuance upon exchange of LP units that will be held by limited partners of Summit Holdings. Our amended and restated certificate of incorporation to become effective immediately prior to the consummation of this offering authorizes us to issue these shares of Class A common stock and options, rights, warrants and appreciation rights relating to Class A common stock for the consideration and on the terms and conditions established by our board of directors in its sole discretion, whether in connection with acquisitions or otherwise. Similarly, the limited partnership agreement of Summit Holdings permits Summit Holdings to issue an unlimited number of additional limited partnership interests of Summit Holdings with designations, preferences, rights, powers and duties that are different from, and may be senior to, those applicable to the LP Units, and which may be exchangeable for shares of our Class A common stock. Additionally, we have reserved an aggregate of             shares of Class A common stock and LP Units for issuance under our Omnibus Incentive Plan. See “Executive and Director Compensation—Summit Materials, Inc. 2015 Omnibus Incentive Plan.” Any Class A common stock that we issue, including under our Omnibus Incentive Plan or other equity incentive plans that we may adopt in the future, would dilute the percentage ownership held by the investors who purchase Class A common stock in this offering.

If we or our existing investors sell additional shares of our Class A common stock after this offering, the market price of our Class A common stock could decline.

The sale of substantial amounts of shares of our Class A common stock in the public market, or the perception that such sales could occur, could harm the prevailing market price of shares of our Class A common stock. These sales, or the possibility that these sales may occur, also might make it more difficult for us to sell equity securities in the future at a time and at a price that we deem appropriate. Upon completion of this offering we will have a total of             shares of our Class A common stock outstanding. Of the outstanding shares,

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the             shares sold in this offering (or             shares if the underwriters exercise in full their option to purchase additional shares) will be freely tradable without restriction or further registration under the Securities Act, except that any shares held by our affiliates, as that term is defined under Rule 144 of the Securities Act, may be sold only in compliance with the limitations described in “Shares Eligible for Future Sale.”

The remaining outstanding             shares of Class A common stock held by our existing owners and management after this offering (or             shares if the underwriters exercise in full their option to purchase additional shares) will be subject to certain restrictions on resale. We, our officers, directors and holders of certain of our outstanding shares of Class A common stock immediately prior to this offering, including Blackstone, that collectively will own             shares of Class A common stock following this offering (or             shares of Class A common stock if the underwriters exercise their option to purchase additional shares in full), will sign lock-up agreements with the underwriters that will, subject to certain customary exceptions, restrict the sale of the shares of our common stock held by them for 180 days following the date of this prospectus, subject to extension in the case of an earnings release or material news or a material event relating to us. The representatives of the underwriters may, in their sole discretion, release all or any portion of the shares of Class A common stock subject to lock-up agreements. Participants in the directed share program, which provides for the sale of up to 5% of the shares of Class A common stock offered by this prospectus, have agreed to similar restrictions for 180 days following the date of this prospectus, which restrictions may be waived with the prior written consent of the representatives of the underwriters. See “Underwriting (Conflicts of Interest)—Directed Share Program.” See “Underwriting (Conflicts of Interest)” for a description of these lock-up agreements. Upon the expiration of the lock-up agreements, all of such shares will be eligible for resale in a public market, subject, in the case of shares held by our affiliates, to volume, manner of sale and other limitations under Rule 144. We expect that Blackstone will be considered an affiliate 180 days after this offering based on their expected share ownership, as well as their board nomination rights. Certain other of our stockholders may also be considered affiliates at that time. However, commencing 180 days following this offering, the holders of these shares of Class A common stock will have the right, subject to certain exceptions and conditions, to require us to register their shares of Class A common stock under the Securities Act, and they will have the right to participate in future registrations of securities by us. Registration of any of these outstanding shares of Class A common stock would result in such shares becoming freely tradable without compliance with Rule 144 upon effectiveness of the registration statement. See “Shares Eligible for Future Sale.”

We intend to file one or more registration statements on Form S-8 under the Securities Act to register shares of our Class A common stock or securities convertible into or exchangeable for shares of our Class A common stock issued pursuant to our Omnibus Incentive Plan. Any such Form S-8 registration statements will automatically become effective upon filing. Accordingly, shares registered under such registration statements will be available for sale in the open market. We expect that the initial registration statement on Form S-8 will cover             shares of our Class A common stock.

As restrictions on resale end, the market price of our shares of Class A common stock could drop significantly if the holders of these restricted shares sell them or are perceived by the market as intending to sell them. These factors could also make it more difficult for us to raise additional funds through future offerings of our shares of Class A common stock or other securities.

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

Our amended and restated certificate of incorporation and amended and restated bylaws to become effective immediately prior to the consummation of this offering will contain provisions that may make the merger or acquisition of our company more difficult without the approval of our board of directors. Among other things, these provisions:

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Further, as a Delaware corporation, we are also subject to provisions of Delaware law, which may impair a takeover attempt that our stockholders may find beneficial. These anti-takeover provisions and other provisions under Delaware law could discourage, delay or prevent a transaction involving a change in control of our company, including actions that our stockholders may deem advantageous, or negatively affect the trading price of our Class A common stock. These provisions could also discourage proxy contests and make it more difficult for you and other stockholders to elect directors of your choosing and to cause us to take other corporate actions you desire.

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