Nucor Corporation was incorporated in Delaware in 1958. The business of Nucor Corporation and its subsidiaries is the manufacture and sale of steel and steel products, which accounted for all of the sales and the majority of the earnings in 2006, 2005 and 2004. The earnings in 2005 include other income of $9.2 million in settlement of claims against third parties related to environmental matters. The earnings in 2004 include other income of $1.6 million related to pre-tax gains on the sale of equipment.

Nucor is the nation’s largest recycler, using scrap steel as the primary material in producing our products. In 2006, we recycled over 21 million tons of scrap steel.

Segments

Nucor reports its results in two segments: steel mills and steel products. Net sales to external customers, intercompany sales, depreciation expense, earnings before income taxes, assets and capital expenditures by segment for each of the three years in the period ended December 31, 2006, are set forth in Note 18 of Notes to Consolidated Financial Statements of the 2006 Annual Report, which note is hereby incorporated by reference.

Principal Products Produced

Principal products from the steel mills segment are hot-rolled steel (angles, rounds, flats, channels, rebar, sheet, wide-flange beams, pilings, billets, blooms, beam blanks and plate) and cold-rolled steel. Principal products from the steel products segment are steel joists and joist girders, steel deck, cold finished steel, steel fasteners, metal building systems and light gauge steel framing. Hot-rolled steel is manufactured principally from scrap, utilizing electric arc furnaces, continuous casting and automated rolling mills. Cold-rolled steel, cold finished steel, steel joists and joist girders, and steel fasteners are manufactured by further processing of hot-rolled steel. Steel deck is manufactured from cold-rolled steel.

Markets and Marketing

In the steel mills segment, hot-rolled and cold-rolled sheet steel are produced to customer orders. In addition, other hot-rolled and cold-rolled steel are manufactured in standard sizes and inventories are maintained. In 2006, approximately 92% of the steel mills segment production was sold to non-affiliated customers; the remainder was used internally by the steel products segment. Hot-rolled steel and cold-rolled steel are sold primarily to steel service centers, fabricators and manufacturers throughout the United States. In 2006, approximately 75% of our sheet steel sales were made to contract customers with the balance of sales made in the spot market at prevailing prices at the time of sale. These contracts permit price adjustments to reflect changes in prevailing raw material costs and typically have terms ranging from six to twelve months.

In the steel products segment, steel joists and joist girders, and steel deck are sold to general contractors and fabricators throughout the United States. Substantially all work is to order and no unsold inventories of finished products are maintained. All sales contracts are firm fixed-price contracts and are normally competitively bid against other suppliers. Cold finished steel and steel fasteners are manufactured in standard sizes and inventories are maintained. Cold finished steel and steel fasteners are sold primarily to distributors and manufacturers throughout the United States.

Products from both segments are marketed mainly through in-house sales forces. The principal competitive factors are price and service. The markets that Nucor serves are tied to capital and durable goods spending and are affected by changes in economic conditions. Considerable competition exists from numerous domestic

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manufacturers and foreign imports. Unfairly traded steel imports have devastated the U.S. steel industry and its workers. We have continued the aggressive trade case work in which we have engaged over the years with our participation in the current statutory five-year sunset reviews of existing duties for coated sheet and carbon plate products. In late 2006, the International Trade Commission chose to remove the duties that were in place on many of the countries involved in dumping these products into our country. As a result, more foreign steel may continue to enter our borders with negative effects on our business. We are currently evaluating these decisions to begin our work in appeal, and we will continue to fight illegally dumped foreign steel in support of free and fair trade through the legal process. In February 2007, the United States requested World Trade Organization dispute settlement consultations with China regarding China’s provision of prohibited subsidies to its manufacturing exports. We are optimistic that this request is an important first step in strengthening and enforcing existing U.S. trade laws and represents the President’s commitment to achieving a long-term solution to illegal dumping and other unfair trade practices. There can be no assurance that such solutions will be achieved. Nucor actively supports several organizations that promote free and fair trade and that oppose currency manipulation.

Backlog

In the steel mills segment, Nucor’s backlog of orders was approximately $2.52 billion and $2.87 billion at December 31, 2006 and 2005, respectively. Nucor’s backlog of orders in the steel products segment was approximately $572.4 million and $473.7 million at December 31, 2006 and 2005, respectively. These orders are normally filled within one year.

Raw Materials

The primary raw material for the steel mills segment is ferrous scrap, which is acquired from numerous sources throughout the country. Following the escalation of scrap steel prices in 2003 and 2004, years in which prices increased 25% and 74%, respectively, Nucor successfully implemented a raw material sales price surcharge in 2004. This surcharge has helped offset the impact of significantly more volatile scrap prices and has ensured that we were able to purchase the scrap needed to fill our customers’ orders. The average scrap and scrap substitute cost per ton remained at historically high levels in 2005 and 2006, increasing 3% from $238 per ton in 2004 to $244 per ton in 2005 and increasing slightly to $246 in 2006. The primary raw material for the steel products segment is steel, which is almost entirely purchased from the steel mills segment.

The steel mills are also large consumers of electricity and natural gas. Nucor uses cash flow hedges and natural gas purchase contracts to partially manage its exposure to price risk of natural gas that is used during the manufacturing process. Historically, U.S.-based manufacturers have enjoyed competitive energy costs that have allowed competition on equal footing in what is becoming more and more a global market. In recent decades, our government has allowed a growing over-reliance on natural gas for the generation of electricity, while at the same time preventing access to some of the most promising areas for natural gas exploration. As a result, natural gas prices have increased from less than $2.00 per mmbtu in the 1990’s (NYMEX Henry-Hub pricing) to a peak of more than $15.00 per mmbtu in December 2005 and to a calendar 2007 average price currently approaching $8.00 per mmbtu. Since an increasing share of electricity is now generated using natural gas, higher natural gas prices are also increasing costs for consumers of electricity. Nucor actively supports several organizations that are promoting a more rational energy policy. We believe this is critical for not only our future business success, but also for the future of the U.S. economy. Supplies of raw materials and energy have been, and are expected to be, adequate to operate our facilities.

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Strategy

Nucor has historically focused on greenfield growth and on optimizing existing operations in order to keep them state-of-the-art and globally competitive. Capital expenditures are currently projected to be approximately $940 million in 2007, more than two-and-a-half times our capital expenditures in 2006. While approximately $500 million of the 2007 capital spending is allocated to our greenfield projects, the remainder is an estimate of what we will spend to maintain the productivity and efficiency of our existing facilities. In recent years, our focus has expanded to include growing profitably through acquisitions and through joint ventures that leverage new technologies.

Recent Acquisitions, Greenfield Projects and Joint Ventures

In July 2004, Nucor’s wholly owned subsidiary, Nucor Steel Tuscaloosa, Inc., purchased substantially all of the steelmaking assets of Corus Tuscaloosa for a cash price of approximately $89.4 million. The facility is a coiled plate mill that manufactures pressure vessel steel coil, discrete plate and cut-to-length plate products. Although this plant had an initial annual capacity of approximately 800,000 tons, our minimal investments in this facility combined with the benefits of our incentive pay program have increased the capacity to 1,200,000 tons currently. This acquisition was immediately accretive to earnings and made significant operating contributions through 2006.

In August 2004, Nucor’s wholly owned subsidiary, Nucor Steel Decatur, LLC, purchased certain assets of Worthington Industries, Inc.’s cold rolling mill located adjacent to our steel mill in Decatur, Alabama, for a cash purchase price of approximately $80.3 million. The assets purchased include all of the buildings, the pickle line, four-stand tandem cold mill, temper mill and annealing furnaces. This 1,000,000-ton cold mill facility has 600,000 tons of annealing capacity and provides expanded value-added products to our customers in the Southeast.

In February 2005, Nucor purchased the assets of Fort Howard Steel, Inc.’s operations in Oak Creek, Wisconsin, for a cash purchase price of approximately $44.1 million. This facility produces cold finished bar product and has approximately 140,000 tons of annual capacity.

In June 2005, Nucor’s wholly owned subsidiary, Nucor Steel Marion, Inc., purchased substantially all of the assets of Marion Steel Company for a cash purchase price of approximately $110.7 million. This facility produces angles, flats, rebar, rounds and signposts. This facility has grown its capacity from 400,000 tons to 450,000 tons largely as a result of our incentive-based compensation program.

In May 2006, Nucor’s wholly owned subsidiary, Nucor Steel Connecticut, Inc., purchased substantially all of the assets of Connecticut Steel Corporation for a cash purchase price of approximately $43.9 million. This facility produces wire rod, rebar, wire mesh and structural mesh. Located in Wallingford, Connecticut, the bar mill has an annual capacity of approximately 300,000 tons of wire rod and approximately 85,000 tons of wire mesh fabrication and structural mesh fabrication.

In November 2006, Nucor’s wholly owned subsidiary, Verco Decking, Inc., purchased substantially all of the assets of Verco Manufacturing Company, a producer of steel floor and roof decking in three locations in the western United States, for a cash purchase price of approximately $180.0 million. These facilities have an annual capacity of approximately 100,000 tons.

Nucor is also growing through “greenfield” projects using new technologies and growing globally through joint ventures.

Nucor began operations of its 100% owned Castrip ® facility in Crawfordsville, Indiana, in 2002. This facility uses the breakthrough technology of strip casting, to which Nucor holds exclusive rights in the United

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States and Brazil. Strip casting involves the direct casting of molten steel into final shape and thickness without further hot or cold rolling, allowing lower investment and operating costs, reduced energy consumption and smaller scale plants than can be economically built with current technology. This process also reduces the overall environmental impact of producing steel by generating significantly lower emissions. In 2006, the Castrip facility in Indiana set monthly shipping records and began serving our first contract customers for Castrip products. In 2005, we selected Blytheville, Arkansas, as the location for our second Castrip production facility. The Blytheville, Arkansas, Castrip facility is under construction and is expected to begin operating in the second half of 2008. We also plan to establish at least one joint venture with a partner overseas in 2007 to utilize the Castrip technology.

Nucor established several joint ventures in the past few years, forming partnerships to grow in the light gauge steel framing industry and reinforcing steel construction market.

In March 2006, Nucor formed NEXFRAME, LP, a joint venture with Lennar Corporation. This joint venture was established to provide comprehensive light gauge steel framing solutions for residential construction markets across the nation.

In February 2004, Nucor purchased a one-half interest in Harris Steel, Inc., a wholly owned subsidiary of Harris Steel Group, Inc. (“Harris Steel”), to serve the western and northeastern United States rebar fabrication markets. In January 2007, Nucor made a cash tender offer for all of the shares of Harris Steel at Cdn$46.25 per share. The offer places an approximate value of Cdn$1.25 billion (US$1.07 billion) on the equity of Harris Steel. The acquisition, which will be Nucor’s largest to date, is expected to close in the first quarter, upon acceptance by the shareholders of Harris Steel and satisfactory resolution of regulatory approvals.

Raw Materials Projects

Nucor’s raw materials strategy includes the goal of controlling approximately 6,000,000 to 7,000,000 tons per year of high quality scrap substitutes for consumption by the steel mills.

In 2002, Nucor entered a joint venture with The Rio Tinto Group, Mitsubishi Corporation and Chinese steelmaker, Shougang Corporation, to construct a commercial HIsmelt ® plant in Kwinana, Western Australia. The HIsmelt process converts iron ore fines and coal fines directly to liquid metal, eliminating the need for a blast furnace, sinter/pellet plants and coke ovens. Additionally, the HIsmelt technology offers an alternative supply of high-quality iron units as a scrap substitute. Nucor has a 25% interest in the joint venture that owns the HIsmelt commercial plant. Construction was completed and the start-up of operations began in 2005. The facility operated continuously through most of the second half of 2006. This plant has an initial annual capacity of 800,000 metric tons, which is expandable to over 1,500,000 metric tons.

In April 2003, Nucor entered a joint venture with Companhia Vale do Rio Doce (“CVRD”) to construct and operate an environmentally friendly pig iron project in northern Brazil. The project, named Ferro Gusa Carajás S.A. (“FGC”), utilizes two conventional mini-blast furnaces to produce about 380,000 metric tons of pig iron per year, using iron ore from CVRD’s Carajás mine in northern Brazil. The charcoal source is exclusively from eucalyptus trees grown in a cultivated forest of about 80,000 acres with the total project encompassing approximately 175,000 acres in northern Brazil. The cultivated forest removes more carbon dioxide from the atmosphere than the blast furnace emits. Production of pig iron began in the fourth quarter of 2005. Nucor is purchasing all of the production of the plant.

In September 2004, Nucor acquired the idled assets of a direct reduced iron (“DRI”) plant located in Louisiana and subsequently relocated these assets to Trinidad. Construction is complete and heat-up commenced in December 2006. In January 2007, Nucor announced successful ramp up to full production capacity of about

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2,000,000 tons per year at Nu-Iron Unlimited. The Trinidad site benefits from a low cost supply of natural gas under a long-term contract and from favorable logistics for receipt of Brazilian iron ore and shipment of DRI to the United States.

Environmental Matters

Nucor is subject to environmental laws and regulations established by federal, state and local authorities. In December 2000, Nucor entered into a consent decree with the United States Environmental Protection Agency and certain states in order to resolve alleged environmental violations. Under the terms of this decree, Nucor is conducting tests at some of its facilities, performing corrective action where necessary, and piloting certain pollution control technologies.

Employees

Nucor has a simple, streamlined organizational structure to allow our employees to make quick decisions and to be innovative. Our organization is highly decentralized, with most day-to-day operating decisions made by our division general managers and their staff. Only 70 employees are located in our executive offices. All of Nucor’s 11,900 employees are engaged in its steel mills and steel products businesses. None of our employees are represented by labor unions.

Additional Information Incorporated by Reference

Additional information on Nucor’s business is incorporated by reference to Nucor’s 2006 Annual Report, pages 10 through 19.

Available Information

Nucor’s annual report on Form 10-K, quarterly reports on Form 10-Q, Current Reports on Form 8-K, and all amendments to these reports, are available on our website at www.nucor.com , as soon as reasonably practicable after Nucor files these reports electronically with, or furnishes them to, the Securities and Exchange Commission (“SEC”). Except as otherwise stated in these reports, the information contained on our website or available by hyperlink from our website is not incorporated into this Annual Report on Form 10-K or other documents we file with, or furnish to, the SEC.

Item 1A. Risk Factors

Many of the factors that affect our business and operations involve risk and uncertainty. The factors described below are some of the risks that could materially negatively affect our business, financial condition and results of operations.

Our industry is cyclical and prolonged economic declines could have a material adverse effect on our business.

Demand for most of our products is cyclical in nature and sensitive to general economic conditions. Our business supports cyclical industries such as the commercial construction, energy, appliance and automotive industries. As a result, downturns in the United States economy or any of these industries could materially adversely affect our results of operations and cash flows. Because steel producers generally have high fixed costs, reduced volumes result in operating inefficiencies. Over the five-year period ended December 31, 2006, our net earnings have varied from a high of $1.76 billion in 2006 to a low of $62.8 million in 2003. Future economic downturns or a prolonged stagnant economy could materially adversely affect our business, results of operations, financial condition and cash flows.

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Overcapacity in the global steel industry could increase the level of steel imports, which may negatively affect our business, results of operations and cash flows.

Global steel-making capacity exceeds global consumption of steel products. This excess capacity results in manufacturers in certain countries exporting significant amounts of steel at prices below their cost of production. These imports, which are also affected by demand in the domestic market, international currency conversion rates and domestic and international government actions, can result in downward pressure on steel prices, which could materially adversely affect our business, results of operations, financial condition and cash flows.

Overcapacity in China, the world’s largest producer and consumer of steel, has the potential to result in a further increase in imports of low-priced, unfairly traded steel to the United States. In recent years, capacity growth in China has significantly exceeded the growth in Chinese market demand. A continuation of this unbalanced growth trend or a significant decrease in China’s rate of economic expansion could result in China increasing steel exports.

The results of our operations are sensitive to volatility in steel prices and changes in the cost of raw materials, particularly scrap steel.

We rely to a substantial extent on outside vendors to supply us with raw materials that are critical to the manufacture of our products. We acquire our primary raw material, steel scrap, from numerous sources throughout the country. Although we believe that the supply of scrap is adequate to operate our facilities, purchase prices of these critical raw materials are subject to volatility and growing scrap exports to satisfy the scrap demand of global competitors. At any given time, we may be unable to obtain an adequate supply of these critical raw materials with price and other terms acceptable to us.

If our suppliers increase the prices of our critical raw materials, we may not have alternative sources of supply. In addition, to the extent that we have quoted prices to our customers and accepted customer orders for our products prior to purchasing necessary raw materials, we may be unable to raise the price of our products to cover all or part of the increased cost of the raw materials, although we have successfully used a raw material surcharge in the steel mills segment since 2004. Also, if we are unable to obtain adequate and timely deliveries of our required raw materials, we may be unable to timely manufacture sufficient quantities of our products. This could cause us to lose sales, incur additional costs, delay new product introductions and suffer harm to our reputation.

Changes in the availability and cost of electricity and natural gas are subject to volatile market conditions that could adversely affect our business.

Our steel mills are large consumers of electricity and natural gas. We rely upon third parties for our supply of energy resources consumed in the manufacture of our products. The prices for and availability of electricity, natural gas, oil and other energy resources are subject to volatile market conditions. These market conditions often are affected by weather, political and economic factors beyond our control. Disruptions in the supply of our energy resources could temporarily impair our ability to manufacture our products for our customers. Increases in our energy costs could materially adversely affect our business, results of operations, financial condition and cash flows.

Our steel making processes, and the manufacturing processes of many of our customers, are energy intensive and generate carbon dioxide and other “greenhouse gasses” (GHG’s).

The U.S. House of Representatives has recently created a Select Committee on Energy Independence and Global Warming. The Speaker of the House has also asked other committees in the House that have jurisdiction over energy, environment and technology policy to report legislation on these issues by June 2007. We expect the

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legislation, when adopted, will increase our energy and other operating costs. Unless this legislation addresses GHG’s globally, these increased costs would hurt our ability to compete with foreign steel producers who would not be subject to this legislation. These increased costs could also encourage more of our customers to relocate their manufacturing facilities to foreign countries that do not restrict GHG emissions and where Nucor is not positioned to sell or distribute our products. This legislation is also likely to increase energy costs for all U.S. consumers resulting in a weaker domestic economy.

We plan to continue to implement acquisition strategies and may encounter difficulties in integrating businesses we acquire.

We plan to continue to seek attractive opportunities to acquire businesses, enter into joint ventures and make other investments that are complementary to our existing strengths. Realization of the anticipated benefits of acquisitions or other transactions will depend on our ability to integrate these transactions with our operations and to cooperate with our strategic partners. Our business, results of operations, financial condition and cash flows could be materially and adversely affected if we are unable to successfully integrate these businesses.

In addition, we may enter into joint ventures or acquisitions located outside the U.S., which may be adversely affected by foreign currency fluctuations, changes in economic conditions and changes in local government regulations and policies.

Some of our competitors who have emerged from bankruptcy have been able to significantly reduce their operating costs, which could negatively impact our competitive position.

Over the past few years, many domestic steel companies have sought protection under Chapter 11 of the United States Bankruptcy Code and have continued to operate. Some have reduced prices to maintain volumes and cash flows and obtained concessions from their labor unions and suppliers. In some cases, they have even expanded and modernized while in bankruptcy. Upon emergence from bankruptcy, these companies, or new entities that purchase their facilities through the bankruptcy process, may be relieved of certain environmental, retiree and other obligations. Additionally, some of our competitors may grow by acquiring less expensive capacity out of bankruptcy. As a result, they may be able to operate with lower costs, a primary competitive factor in the steel industry, which could negatively affect our competitive position.

Competition from other materials may materially adversely affect our business.

In many applications, steel competes with other materials, such as aluminum, cement, composites, glass, plastic and wood. Increased use of these materials in substitution for steel products could materially adversely affect prices and demand for our steel products.

Our operations are subject to business interruptions and casualty losses.

The steel-making business is subject to numerous inherent risks, particularly unplanned events such as explosions, fires, other accidents, inclement weather and transportation interruptions. While our insurance coverage could offset losses relating to some of those types of events, our results of operations and cash flows could be adversely impacted to the extent any such losses are not covered by our insurance.

Our business requires substantial capital investment and maintenance expenditures, and our capital resources may not be adequate to provide for all of our cash requirements.

Our operations are capital intensive. For the five-year period ended December 31, 2006, our total capital expenditures, excluding acquisitions, were approximately $1.41 billion. Our business also requires substantial

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expenditures for routine maintenance. Although we expect requirements for our business needs, including the funding of capital expenditures, debt service for financings and any contingencies to be financed by internally generated funds or from borrowings under our $700 million unsecured revolving credit facility, we cannot assure you that this will be the case. Any future significant acquisitions could require additional financing from external sources.

Environmental compliance and remediation could result in substantially increased costs and materially adversely impact our competitive position.

Our operations are subject to numerous federal, state and local laws and regulations relating to protection of the environment, and we, accordingly, make provision in our financial statements for the estimated costs of compliance. These laws are becoming increasingly stringent, resulting in inherent uncertainties in these estimates.

In 2000, we agreed to a comprehensive consent decree with the United States Environmental Protection Agency and certain states to resolve disputes about alleged past environmental violations. Under the terms of the consent decree, we are continuing to conduct tests at some of our facilities, perform corrective action where necessary and pilot various pollution control technologies. Our accrued environmental costs include the expenses we expect to incur as a result of our ongoing compliance with the terms of this consent decree.

Our competitors in the United States and in some western European and other countries with advanced industrial economies are subject to similar environmental laws and regulations. The specific impact on each competitor may vary, however, depending upon a number of factors, including the age and location of operating facilities, production processes (such as a electric-arc based versus an integrated producer) and the specific products and services it provides. To the extent that competitors, particularly foreign steel producers and manufacturers of competitive products, are not required to incur equivalent costs, our competitive position could be materially adversely impacted.

Item 1B. Unresolved Staff Comments

None.