Form 10-K

Large accelerated filer ü

Accelerated filer

Non-accelerated filer

Smaller reporting company

(Do not check if a smaller reporting company)

(Address, including zip code, of principal executive offices and Registrant’s telephone number, including area code)

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

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

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

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

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [ ]

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

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

As of April 2, 2011, 37,928,077 shares of common stock were outstanding, and the aggregate market value of the shares of common stock (based upon the $34.80 closing sale price on that date, as reported on the NASDAQ Global Select Market) held by non-affiliates (excludes 349,975 shares reported as beneficially owned by directors and executive officers – does not constitute an admission as to affiliate status) was approximately $1,307.7million.

As of November 11, 2011, there were 34,620,493 shares of common stock outstanding.

“SAFE HARBOR” CAUTIONARY STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995:

The statements contained in this Form 10-K that provide guidance or are not historical facts (such as statements in the future tense and statements including “believe,” “expect,” “intend,” “plan,” “anticipate,” “goal,” “target” and similar terms and concepts), including all discussions of periods which are not yet completed, are forward-looking statements that involve risks and uncertainties, including, but not limited to:

In addition, see Risk Factors in Part I, Item 1A and Management’s Discussion and Analysis of Financial Condition and Results of Operations in Part II, Item 7 for a further discussion of some of the factors that could affect future results.

Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) participate in the Electronic Manufacturing Services (“EMS”) industry. We deliver optimized Product Realization solutions through a unique Product Realization Value Stream services model. This customer focused services model seamlessly integrates innovative product conceptualization, design, commercialization, manufacturing, fulfillment and sustaining services to deliver comprehensive end-to-end solutions for customers in the Americas (“AMER”), European (“EMEA”) and Asia-Pacific (“APAC”) regions. Award-winning customer service is provided to over 130 branded product companies in the Wireline/Networking, Wireless Infrastructure, Medical, Industrial/Commercial and Defense/Security/Aerospace market sectors. Our customers’ products typically require exceptional production and supply-chain flexibility, necessitating an optimized demand-pull-based manufacturing and supply chain solution across an integrated global platform. Many of our customers’ products require complex configuration management and direct order fulfillment to their customers across the globe. In such cases we provide global logistics management and after-market service and repair. Our customers’ products may have stringent requirements for quality, reliability and regulatory compliance. We offer our customers the ability to outsource all phases of product realization, including product specifications; development, design and design verification; regulatory compliance support; prototyping and new product introduction; manufacturing test equipment development; materials sourcing, procurement and supply-chain management; product assembly/manufacturing, configuration and test; order fulfillment, logistics and service/repair.

Plexus is passionate about its goal to be the leading EMS company in the world at servicing mid-to-low volume, higher complexity customer programs characterized by unique flexibility, technology, quality and regulatory requirements. We have aligned our business operations, processes, workforce and financial metrics to support this strategy.

We operate flexible manufacturing facilities and processes designed to accommodate customers with multiple product-lines and configurations. Each of our customers are supported by a multi-disciplinary customer team and one or more uniquely configured “focus factories” supported by a supply-chain and logistics solution specifically designed to meet the flexibility and responsiveness required to support that customer’s fulfillment requirements.

Our go-to-market strategy is also tailored to our target market sectors and business strategy, with business development and customer management teams dedicated to each of the five sectors we serve. These teams are accountable to understand sector participants, technology, unique quality and regulatory requirements and longer-term trends in these sectors. These teams also help set our strategy for growth in these sectors with a particular focus on expanding the services and value-add that we provide customers.

In addition, our financial model is aligned with our business strategy, with our primary focus to earn a return on invested capital (“ROIC”) 500 basis points in excess of our weighted average cost of capital (“WACC”). We review our internal calculation of WACC annually, and at the end of fiscal 2011 reduced our estimated WACC to 12.5%. Lower manufacturing volumes, flexibility and fulfillment requirements, our sector-based go-to-market strategy, and complex quality and regulatory compliance requirements typically result in higher investments in inventory and selling and administrative costs relative to our competitors, particularly those that provide EMS services for high-volume, less complex products with less stringent requirements (such as consumer electronics). By exercising discipline to generate a ROIC in excess of our WACC, our goal is to ensure that Plexus creates value for our shareholders.

Our customers include both industry-leading original equipment manufacturers (“OEMs”) and other technology companies that have never manufactured products internally. As a result of our focus on serving market sectors that rely on advanced electronics technology, our business is influenced by technological trends such as the level and rate of development of telecommunications infrastructure, the expansion of networks and use of the Internet. In addition, the federal Food and Drug Administration’s approval of new medical devices, defense procurement practices and other governmental approval and regulatory processes can affect our business. Our business has also benefited from the trend to increased outsourcing by OEMs.

product assembly. Turnkey services require material procurement and warehousing, in addition to manufacturing, and involve greater resource investments than consignment services. Other than certain test equipment and software used for internal operations, we do not design or manufacture our own proprietary products.

Established in 1979 as a Wisconsin corporation, we have approximately 9,000 full-time employees, including approximately 1,700 engineers and technologists dedicated to product development and design, test equipment development and design, and manufacturing process development and control, all of whom operate from 24 active facilities in 15 locations, totaling approximately 2.6 million square feet. These facilities are strategically located to support the global supply chain, manufacturing and engineering needs of customers in our targeted market sectors.

We maintain a website at www.plexus.com. We make available through that website, free of charge, copies of our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Reports on Form 8-K, and amendments to those reports, as soon as reasonably practical after we electronically file those materials with, or furnish them to, the Securities and Exchange Commission (“SEC”). Our Code of Conduct and Business Ethics is also posted on our website. You may access these SEC reports and the Code of Conduct and Business Ethics by following the links under “Investor Relations” at our website.

Plexus offers a broad range of integrated services as more fully described below; our customers may utilize any, or all, of the following services and tend to use more of these services as their outsourcing strategies mature:

Product development and design. We provide comprehensive conceptual design and value-engineering services. These product design services include program management, feasibility studies, product conceptualization, specification development for product features and functionality, circuit design (including digital, microprocessor, power, analog, radio frequency (RF), optical and micro-electronics), field programmable gate array design (FPGA), printed circuit board layout, embedded software design, mechanical design (including thermal analysis, fluidics, robotics, plastic components, sheet metal enclosures, and castings), development of test specifications and product verification testing. We invest in the latest design automation tools and technology. We also provide comprehensive value-engineering services for our customers that extend the life cycles of their products. These value-added services include engineering change-order management, cost reduction redesign, component obsolescence management, product feature expansion, test enhancement and component re-sourcing.

Prototyping and new product introduction services. We provide assembly of prototype products within our operating sites. We supplement our prototype assembly services with other value-added services, including materials management, analysis of the manufacturability and testability of a design, test implementation and pilot production runs leading to volume production. These services link our engineering and our customers’ engineering to our volume manufacturing facilities. These links facilitate an efficient transition from engineering to manufacturing. We believe that these services provide significant value to our customers by accelerating their products’ time-to-market schedule, reducing change activity and providing a robust product set.

Test equipment development. Enhanced product functionality has led to increasingly complex components and assembly techniques; consequently, there is a need to design and assemble increasingly complex in-circuit and functional test equipment for electronic products and assemblies. Our internal development of this test equipment allows us to rapidly specify, implement, maintain and enhance test solutions that efficiently test printed circuit assemblies, subassemblies, system assemblies and finished products. We also develop specialized equipment that allows us to environmentally stress-test products during functional testing to assure reliability. We believe that the internal design and production of test equipment is an important factor in our ability to provide technology-driven products of consistently high quality.

Material sourcing and procurement. We provide contract manufacturing services on either a “turnkey” basis, which means we source and procure the materials required for product assembly, or on a “consignment” basis, which means the customer supplies the materials necessary for product assembly. Turnkey services include materials procurement and warehousing in addition to manufacturing and involve greater resource investment and potential inventory risk than consignment services. Substantially all of our manufacturing services are currently on a turnkey basis.

Agile manufacturing services. We have the manufacturing services expertise required to assemble very complex electronic products that utilize multiple printed circuit boards and subassemblies. These manufacturing services, which we endeavor to provide on an agile and rapid basis, are typically configured to fulfill unique end-customer

requirements and many are shipped directly to our customers’ end users. We provide a range of higher level assembly services to our customers; these products typically fall into one of the following categories in our assembly spectrum:

System integration and mechatronic integration products can be very large and could include products such as kiosks, finished medical products and complex electro-mechanical assemblies. These products often combine many of the other integrated services we provide and may require more unique facility configurations as well as supply chain solutions than we typically employ.

Fulfillment and logistic services. We provide fulfillment and logistic services to many of our customers. Direct Order Fulfillment (“DOF”) entails receiving orders from our customers that provide the final specifications required by the end-customer. We then Build to Order (“BTO”) and Configure to Order (“CTO”) and deliver the product directly to the end-customer. The DOF process relies on Enterprise Resource Planning (“ERP”) systems integrated with those of our customers to manage the overall supply chain from parts procurement through manufacturing and logistics.

After-market support. We provide service support for manufactured products requiring repair and/or upgrades, which may or may not be under a customer’s warranty. In support of certain customers, we provide these services for some products which we did not originally manufacture. We provide in and out bound logistics required to support fulfillment and service.

Regulatory requirements. In addition, we have developed certain processes and tools to meet industry-specific requirements. Among these are the tools and processes to assemble finished medical devices that meet U.S. Food and Drug Administration Quality Systems Regulation requirements and similar regulatory requirements in other countries.

Our manufacturing and engineering facilities are ISO certified to 9001:2008 standards. We have additional certifications and/or registrations held by certain of our facilities in the following regions:

We provide services to a wide variety of customers, ranging from large multinational companies to smaller emerging technology companies. During fiscal 2011, we served approximately 130 customers. For many customers, we provide design and production capabilities, thereby allowing these customers to concentrate on research and development, concept development, distribution, marketing and sales. This helps accelerate their time to market, reduce their investment in engineering and manufacturing capacity and optimize total product cost.

Juniper Networks, Inc. (“Juniper”) accounted for 17 percent of our net sales in fiscal 2011, 16 percent in fiscal 2010 and 20 percent in fiscal 2009. No other customer accounted for 10 percent or more of our net sales in fiscal 2011, 2010 or 2009. The loss of any of our major customers could have a significant negative impact on our financial results.

Many of our large customers contract with us through independent multiple divisions, subsidiaries, production facilities or locations. We believe that in most cases our sales to any one such division, subsidiary, facility or location are not dependent on sales to others.

The distribution of our net sales by market sectors is shown in the following table:

Although our current business development focus is based on the end-market sectors noted above, we evaluate our financial performance and allocate our resources on a geographic basis (see Note 13 in Notes to Consolidated Financial Statements regarding our reportable segments). Our array of services for customers in each of these end markets is essentially the same and we do not dedicate operational equipment, personnel, facilities or other resources to particular end markets, nor do we internally track our costs and resources on this basis.

We typically purchase raw materials, including printed circuit boards and electronic components, from manufacturers and distributors. In addition, under certain circumstances, we will purchase components from brokers, customers or competitors. The key electronic components we purchase include specialized components such as application-specific integrated circuits, semiconductors, interconnect products, electronic subassemblies (including memory modules, power supply modules and cable and wire harnesses), inductors, resistors and capacitors. Along with these electronic components, we also purchase components used in manufacturing and higher-level assembly. These components include molded/formed plastics, sheet metal fabrications, aluminum extrusions, robotics, motors, vision sensors, motion/actuation, fluidics, displays, die castings and various other hardware and fastener components. All of these components range from standard to highly customized and vary widely in terms of market availability and price.

Occasional component shortages and subsequent allocations by suppliers are an inherent risk of the electronics industry. Components shortages have been an issue for the industry and for us in fiscal 2011 and fiscal 2010; these shortages are discussed more fully in “Risk Factors” in Part I, Item 1A herein. We actively manage our business to try to minimize our exposure to material and component shortages. We have a corporate sourcing and procurement organization whose primary purpose is to develop supply-chain sources and create strong supplier alliances to ensure, as much as possible, a steady flow of components at competitive prices. We also have a global expediting and escalation process that we believe provides Plexus the ability to effectively track and manage component shortages. Since we design products and therefore can influence the selection of components used in some new products, component manufacturers often provide us with priority access to materials and components, even during times of shortages. We have undertaken a series of initiatives, including the use of advanced supply chain solutions to improve continuity of supply and supply chain flexibility.

Our new business development is organized around end markets, or market sectors. Each market sector has a team of dedicated resources including a business development vice president, a customer management vice president, sales account executives, customer directors, customer managers, engineering and manufacturing subject matter experts, and market sector analysts. Our sales and marketing efforts focus on both targeting new customers and expanding business with existing customers. We believe our ability to provide a full range of product realization services is a marketing advantage; our sector teams participate in marketing through direct customer contact and participation in industry events and seminars.

The market for the services we provide is highly competitive. We compete primarily on the basis of meeting the unique needs of our customers, and providing flexible solutions, timely order fulfillment and strong engineering, testing and production capabilities. We have many competitors in the EMS industry. Larger and more geographically diverse competitors have substantially more resources than we do. Other, smaller competitors primarily compete only in specific sectors, typically within limited geographical areas. We also compete against companies that design or manufacture items in-house. In addition, we compete against foreign, low-labor cost manufacturers. This foreign, low-labor cost competition tends to focus on commodity and consumer-related products, which is not our focus.

We own various service marks that we use in our business; these marks are registered in the trademark offices of the United States and other countries. Although we own certain patents, they are not currently material to our business. We do not have any material copyrights.

Our integrated ERP platform serves all of our manufacturing sites. This ERP platform augments our other management information systems and includes various software systems to enhance and standardize our ability to translate information from multiple production facilities into operational and financial information as well as create a consistent set of core business applications at our facilities worldwide. We believe the related software licenses are of a general commercial character on terms customary for these types of agreements.

We are subject to a variety of environmental regulations relating to air emission standards and the use, storage, discharge and disposal of hazardous chemicals used during our manufacturing process. We believe that we are in compliance with all federal, state and foreign environmental laws and do not anticipate any significant expenditures in maintaining our compliance; however, there can be no assurance that violations will not occur which could have a material adverse effect on our financial results.

Our employees are one of our primary strengths, and we make a considerable effort to maintain a well-qualified and motivated work force. We have been able to offer enhanced career opportunities to many of our employees. Our human resources department identifies career objectives and monitors specific skill developments for employees with potential for advancement. We invest at all levels of the organization to ensure that employees are well trained. We have a policy of involvement and consultation with employees at every facility and strive for continuous improvement at all levels.

We employ approximately 9,000 full-time employees. Given the quick response times required by our customers, we seek to maintain flexibility to scale our operations as necessary to maximize efficiency. To do so, we use skilled temporary labor in addition to our full-time employees. In the United Kingdom, approximately 140 of our employees are covered by union agreements. These union agreements are typically renewed at the beginning of each year, although in a few cases these agreements may last two or more years. Our employees in the United States, Romania, Germany, Malaysia, China and Mexico are not covered by union agreements. We have no history of labor disputes at any of our facilities. We believe that our employee relationships are good.

Our net sales and operating results may vary significantly from period to period.

Our quarterly and annual results may vary significantly depending on various factors, many of which are beyond our control. These factors include:

The majority of our net sales come from a relatively small number of customers and a limited number of market sectors; if we lose any of these customers or if there are problems in those market sectors, our net sales and operating results could decline significantly.

Net sales to our ten largest customers have represented a majority of our net sales in recent periods. Our ten largest customers accounted for approximately 55 percent of our net sales for the fiscal year ended October 1, 2011, and 57 percent of our net sales for the fiscal year ended October 2, 2010. For the fiscal year ended October 1, 2011, there was one customer that represented 10 percent or more of our net sales. Our principal customers may vary from period to period, and our principal customers may not continue to purchase services from us at current levels, or at all. Especially given our discrete number of customers, significant reductions in net sales to any of these customers, the loss of major customers or our failure to make appropriate choices as to the customers we serve could seriously harm our business.

In addition, we focus our net sales to customers in only a few market sectors, and we endeavor to carefully choose those sectors. Each of these sectors is subject to macroeconomic conditions as well as trends and conditions that are sector specific. Shifts in the performance of a sector served by Plexus, as well as the economic and business conditions that affect the sector, or our failure to choose appropriate sectors can particularly impact Plexus. For instance, sales in the medical sector are substantially affected by trends in that industry, such as government reimbursement rates and uncertainties relating to the financial health of, and pending changes in the structure of, the U.S. health care sector generally. Further, potential reductions in U.S. defense spending could substantially affect our opportunities in our Defense/Security/Aerospace sector. Any weakness in the market sectors in which our customers are concentrated could affect our business and results of operations.

In the current economic environment, we are seeing increased merger and acquisition activity that has already affected, and may continue to impact, our customers. Specifically, two of our significant customers were acquired in the first quarter of fiscal 2010 and substantially disengaged in fiscal 2011.

Instability in the global credit markets and continuing economic weakness may adversely affect our earnings, liquidity and financial condition.

Global financial and credit markets have been, and continue to be, unstable and unpredictable. Worldwide economic conditions have been weak and may deteriorate further. For example, substantial credit issues have arisen in the European Union as a result of the sovereign debt crisis and other factors affecting economies worldwide. The instability of the markets and weakness of the economy could continue to affect the demand for our customers’ products, the amount, timing and stability of their product demand from us, the financial strength of our customers and suppliers, their ability or willingness to do business with us, our willingness to do business with them, and/or our suppliers’ and customers’ ability to fulfill their obligations to us and/or the ability of us, our customers or our suppliers to obtain credit. Further, global credit market and economic challenges may affect the ability of counterparties to our agreements, including our credit agreement and interest rate swap agreements, to perform their obligations under those

agreements. These factors could adversely affect our operations, earnings and financial condition.

We may experience raw material and component parts shortages and price fluctuations.

We do not have any long-term supply agreements. At various times, including fiscal 2011, we have experienced raw material and component parts shortages due to supplier capacity constraints or their failure to deliver. Part shortages were prevalent during portions of fiscal 2011 and fiscal 2010 across the EMS industry, based on the relatively quick recovery of the demand for technological equipment and the resulting capacity constraints at suppliers; shortages have continued into, and are expected to persist in the future. Such constraints can also be caused by world events, such as government policies, terrorism, armed conflict and economic recession. In addition, the March 2011 earthquake and tsunami in Japan disrupted the global supply chain for certain components manufactured in Japan that are incorporated in the products we manufacture and the flooding in Thailand during our fiscal fourth quarter of 2011 had a similar impact. While we have yet to experience material adverse effects resulting from these events, the magnitude and duration of the impact on us resulting from these events are not yet known. We rely on a limited number of suppliers for many of the raw materials and component parts used in the assembly process and, in some cases, may be required to use suppliers that are the sole provider of a particular raw material or component part. Such suppliers may encounter quality problems or financial difficulties which could preclude them from delivering raw materials or component parts timely or at all. Some suppliers have ceased doing business due to economic or other circumstances, and more may do so in the future. Supply shortages and delays in deliveries of raw materials or component parts have in some cases resulted in delayed production of assemblies, which have increased our inventory levels and adversely affected our operating results in certain periods. An inability to obtain sufficient inventory on a timely basis could also harm relationships with our customers.

In addition, raw material and component parts that are delivered to us may not meet our specifications or other quality criteria. Certain materials provided to us may be counterfeit or violate the intellectual property rights of others. The need to obtain replacement materials and parts may negatively affect our manufacturing operations. The inadvertent use of any such parts or products may also give rise to liability claims.

Raw material and component part supply shortages and delays in deliveries can also result in increased pricing. While many of our customers permit quarterly or other periodic adjustments to pricing based on changes in raw material or component part prices and other factors, we typically bear the risk of price increases that occur between any such repricing or, if such repricing is not permitted, during the balance of the term of the particular customer contract. Conversely, raw material and component part price reductions have contributed positively to our operating results in the past. Our inability to continue to benefit from such reductions in the future could adversely affect our operating results.

Plexus is a multinational corporation and operating in multiple countries exposes us to increased risks, including adverse local developments and currency risks.

We have operations in many countries; operations outside of the U.S. in the aggregate now represent a majority of our revenues. We also purchase a significant number of components manufactured in various countries. These international aspects of our operations, which are likely to increase over time, subject us to the following risks that could materially impact our operations and operating results:

We continue to monitor our risk associated with foreign currency translation and have entered into limited forward contracts to address this risk. As our international operations expand, our failure to adequately hedge foreign currency transactions and/or the currency exposures associated with assets and liabilities denominated in non-functional currencies could adversely affect our consolidated financial condition, results of operations and cash flows.

In addition, changes in policies by the U.S. or other governments could negatively affect our operating results due to changes in duties, tariffs, taxes or limitations on currency or fund transfers. For example, our facility in Mexico

operates under the Mexican Maquiladora program, which provides for reduced tariffs and eased import regulations; we could be adversely affected by changes in that program or our failure to comply with its requirements.

Our customers do not make long-term commitments and may cancel or change their production requirements.

EMS companies must respond quickly to the requirements of their customers. We generally do not obtain firm, long-term purchase commitments from our customers, and frequently do not have visibility as to their future demand. Customers also cancel requirements, change production quantities, delay production or revise their forecasts for a number of reasons that are beyond our control. The success of our customers’ products in the market and the strength of the markets themselves affect our business. Cancellations, reductions or delays by a significant customer, or by a group of customers, could seriously harm our operating results and negatively affect our working capital levels. Such cancellations, reductions or delays have occurred and may continue to occur.

In addition, we make significant decisions based on our estimates of customers’ requirements, including determining the levels of business that we will seek and accept, production schedules, component procurement commitments, working capital management, facility requirements, personnel needs and other resource requirements. The short-term nature of our customers’ commitments and the possibility of rapid changes in demand for their products reduce our ability to accurately estimate the future requirements of those customers. Since many of our operating expenses are fixed, a reduction in customer demand can harm our operating results. Moreover, since our margins vary across customers and specific programs, a reduction in demand with higher margin customers or programs will have a more significant adverse effect on our operating results.

Rapid increases in customer requirements may stress personnel and other capacity resources. We may not have sufficient resources at any given time to meet all of our customers’ demands or to meet the requirements of a specific program.

Defense contracting can be subject to extensive procurement processes and other factors that can affect the timing and duration of contracts as well as product demand. For example, defense procurement is subject to continued Congressional appropriations for these programs, as well as continued determinations by the Department of Defense regarding whether to continue them. Products for the military are also subject to continued testing of their operations in the field and changing military operational needs, which could affect the possibility and timing of future orders. While those arrangements may result in a significant amount of net sales in a short period of time, they may or may not result in continuing long-term programs or relationships. Even in the case of continuing long-term programs or relationships, orders in the defense sector can be episodic, can vary significantly from period to period, and are subject to termination.

We have a complex business model, and our failure to properly manage that model could affect our operations and financial results.

Our business model focuses on products and services in the mid-to-lower-volume, higher-mix segment of the EMS market. Our customers’ products typically require significant production and supply-chain flexibility, necessitating optimized demand-pull-based manufacturing and supply chain solutions across an integrated global platform. The products we manufacture are also typically complex, highly regulated, and require complicated configuration management and direct order fulfillment capabilities to global end customers. Relative to many of our competitors that manufacture more standardized products with larger production runs, our business model requires a greater degree of attention and resources, including working capital, management and technical personnel, and the development and maintenance of systems and procedures to manage diverse manufacturing, regulatory, and service requirements. If we fail to effectively manage our business model, we may lose customer confidence and our reputation may suffer. The Company’s reputation is the foundation of our relationships with key stakeholders. If we are unable to effectively manage real or perceived issues, which could negatively impact sentiments toward the Company, our ability to maintain or expand business opportunities could be impaired and our financial results could suffer on a going-forward basis.

In addition, the complexity of our service model often results in complex and challenging contractual obligations as well as commitments from us to our customers. If we fail to meet those obligations, it could affect our reputation and our ability to obtain future business, as well as impair our ability to enforce our rights (including those related to payment) under those contracts.

Challenges associated with the engagement of new customers or programs could affect our operations and financial results.

Our engagement with new customers, as well as the addition of new work for existing customers, can present challenges in addition to opportunities. We must initially determine whether it would be in our interests from a business perspective to pursue a particular potential new customer or program, including evaluating the customer’s

and/or program’s fit with our value proposition as well as their end market success. If we make the decision to proceed, we need to ensure that our terms of engagement, including our pricing and other contractual provisions, appropriately reflect the anticipated costs, risks, and rewards of an opportunity. The failure to make prudent engagement decisions and/or to establish appropriate terms of engagement could adversely affect our profitability and margins.

Also, there are inherent risks associated with the timing and ultimate realization of a new program’s anticipated revenue; these factors can sometimes extend for a significant period. Some new programs require us to devote significant capital and personnel resources to new technologies and competencies. We may not meet customer expectations, which could damage our relationships with the affected customers and impact our ability to deliver conforming product on a timely basis. Further, the success of new programs may depend heavily on factors such as product reliability, market acceptance, regulatory approvals and/or economic conditions. The failure of a new program to meet expectations on these factors, or our inability to effectively execute on a new program’s requirements, could result in lost financial opportunities and adversely affect our results of operations.

Most of our contract manufacturing services are provided on a turnkey basis, under which we purchase some, or all, of the required raw materials and component parts. Excess or obsolete inventory, or other failures to manage our working capital, could adversely affect our operating results, including our return on invested capital.

In our turnkey operations, we order materials and components based on customer forecasts and/or orders. Suppliers may require us to purchase materials and components in minimum order quantities that may exceed customer requirements. A customer’s cancellation, delay or reduction of forecasts or orders can also result in excess inventory or additional expense to us. Engineering changes by a customer may result in obsolete raw materials or component parts. While we attempt to cancel, return or otherwise mitigate excess and obsolete materials and components and require customers to reimburse us for excess and obsolete inventory, we may not actually be reimbursed timely or be able to collect on these obligations.

In addition, we provide managed inventory programs for some of our customers under which we hold and manage finished goods or work-in-process inventories. These managed inventory programs result in higher inventory levels, further reduce our inventory turns and increase our financial exposure with such customers. Even though our customers generally have contractual obligations to purchase such inventories from us, we remain subject to the risk of enforcing those obligations.

Failure to manage periods of growth or contraction, if any, may seriously harm our business.

Our industry frequently sees periods of expansion and contraction to adjust to customers’ needs and market demands. Plexus regularly contends with these issues and must carefully manage its business to meet customer and market requirements. If we fail to manage these growth and contraction decisions effectively, we can find ourselves with either excess or insufficient resources and our business, as well as our profitability, may suffer.

Expansion can inherently include additional costs and start-up inefficiencies. We expect to open a new manufacturing facility in Malaysia (Penang) during the first quarter of fiscal 2012 and anticipate completing a new manufacturing facility in China (Xiamen) in the second half of fiscal 2012. We have also announced our intention to construct a facility in Romania (Oradea) to replace a leased facility and further expand employment in Germany (Darmstadt). If we are unable to effectively manage our currently anticipated growth, or related anticipated net sales are not realized, our operating results could be adversely affected. In addition, we may expand our operations in new geographical areas where currently we do not operate. Other risks of current or future expansion include:

Periods of contraction or reduced net sales, or other factors affecting particular sites, create other challenges. We must determine whether facilities remain viable, whether staffing levels need to be reduced, and how to respond to changing levels of customer demand. While maintaining multiple facilities or higher levels of employment entail short-term costs, reductions in facilities and/or employment could impair our ability to respond to market improvements or to maintain customer relationships. Our decisions to reduce costs and capacity can affect our short-term and long-term results. When we make decisions to reduce capacity or to close facilities, we frequently incur restructuring charges.

In addition, to meet our customers’ needs, or to achieve increased efficiencies, we sometimes require additional capacity in one location while reducing capacity in another. For example, in early fiscal 2009 we ceased operations at our former Ayer, Massachusetts facility and reduced headcount in Juarez, Mexico and other North American facilities, even though we continued to expand in other areas. Since customers’ needs and market conditions can vary and change rapidly, we may find ourselves in a situation where we simultaneously experience the effects of contraction in one location and expansion in another location, such as those noted above.

The Company has been granted tax holidays for its Malaysian and Xiamen, China subsidiaries. These tax holidays expire in 2024 and 2013, respectively, and are subject to certain conditions with which the Company expects to comply and would risk adverse tax consequences if we do not. The Malaysian Investment Development Authority granted approval to extend our tax holiday in Malaysia for a period of five years through December 31, 2024, subject to certain conditions. Mexico adopted tax reform legislation that took effect on January 1, 2010, and provides for a temporary increase in its income tax and value added tax rates from 28% to 30% and 15% to 16%, respectively, along with certain other changes. While we continue to analyze the impact of this legislation, we do not currently believe it will have a material impact on our effective income tax rate in future periods. Given the scope of our international operations and our international tax arrangements, proposed changes to the manner in which U.S. based multinational companies are taxed in the U.S. could have a material impact on our operating results and competitiveness.

The Company reviews the probability of the realization of our net deferred tax assets each period based on forecasts of taxable income in both the U.S. and foreign jurisdictions. This review uses historical results, projected future operating results based upon approved business plans, eligible carryforward periods, tax planning opportunities and other relevant considerations. Adverse changes in the profitability and financial outlook in the U.S. or foreign jurisdictions may require the creation of a valuation allowance to reduce our net deferred tax assets. Such changes could result in material non-cash expenses in the period in which the changes are made.

We and our customers are subject to increasingly extensive government regulations and third party certification requirements.

We are subject to extensive government regulation relating to the products we design and manufacture and as to how we conduct our business. These regulations affect the sectors we serve and every aspect of our, and our customers’, business, including our labor, employment, workplace safety, environmental and import/export practices, as well as many other facets of our operations. In addition, as a result of customer requirements and the need to enhance our competitive position, we seek to obtain and maintain various certifications from third parties relating to our quality systems and standards. The regulatory climate in the U.S. and other countries has become increasingly complex and regulatory activity has increased in recent periods, which can affect both our operations as well as the opportunities in the markets we serve due to the effects on our customers and their end users. The regulatory climate can itself affect the demand for our services, and our failure to comply with regulations and certifications could seriously affect our operations, customer relationships, reputation and profitability.

Our medical sector business is subject to substantial government regulation, primarily from the federal Food and Drug Administration (“FDA”) and similar regulatory bodies in other countries. We must comply with statutes and regulations covering the design, development, testing, manufacturing and labeling of medical devices and the reporting of certain information regarding their safety. Failure to comply with these regulations can result in, among other things, fines, injunctions, civil penalties, criminal prosecution, recall or seizure of devices, or total or partial suspension of production. The FDA also has the authority to require repair or replacement of equipment, or the refund of the cost of a device manufactured or distributed by our customers. Violations may lead to penalties or shutdowns of a program or a facility. Failure or noncompliance could have an adverse effect on our reputation as well as our results of operations. In addition, government reimbursement rates and other regulations, as well as the financial health of health care providers, and pending changes in how health care in the U.S. is structured and how medical devices are taxed, could affect the willingness and ability of end customers to purchase the products of our customers in the medical sector.

We also design and manufacture products for customers in the defense and aerospace industries. Companies that design and manufacture products for these industries face significant regulation by the Department of Defense, Department of State, Federal Aviation Authority, and other governmental agencies in the U.S. as well as in other countries. Failure to comply with related requirements and regulations, including the International Traffic in Arms Regulation, could result in fines, penalties, injunctions, criminal prosecution, and an inability to participate in contracts with the government or their contractors, any of which could materially affect our financial condition and results of operations.

The end markets for most of our customers in the wireline/networking and wireless infrastructure sectors are subject to regulation by the Federal Communications Commission, as well as by various governmental agencies. The policies of these agencies can directly affect both the near-term and long-term demand and profitability of the sector and therefore directly impact the demand for products that we manufacture.

At the corporate level, as a publicly-held company, we are subject to increasingly stringent laws, regulation and other requirements, including the Dodd-Frank Wall Street Reform and Consumer Protection Act, affecting, among other areas, our accounting, corporate governance practices and securities disclosures. Our failure to comply with these requirements could materially affect our financial condition and results of operations.

Governments worldwide are becoming increasingly aggressive in enforcing and adopting anti-corruption laws. The U.S. Foreign Corrupt Practices Act, the U.K. Anti-Bribery Act, and the China Anti-Unfair Competition Law, among others, apply to us and our operations. These requirements result in compliance costs, and the failure to comply with these requirements could result in substantial further costs to us as well as affect our reputation.

The growth and changing requirements of our business are imposing a heightened level of activity involving import and export compliance requirements on us. We were notified in April 2009 by U.S. Customs and Border Protection (“CBP”) of its intention to conduct a customary Focused Assessment of our import activities during fiscal 2008 and of our processes and procedures to comply with U.S. Customs laws and regulations. During September 2010 the Company reported errors relating to import trade activity from July 2004 to the date of Plexus’ report. CBP has indicated that on-site fieldwork for the audit was completed as of June 2011 and the Company is currently awaiting final determination of CBP duties and fees. Plexus has agreed that it will implement improved processes and procedures and review these corrective measures with CBP. We recorded an accrual in other current accrued liabilities in the first quarter of fiscal 2010 when the amount became estimable and probable, which was not material to the financial statements. At this time, we do not believe that any deficiencies in processes or controls or unanticipated costs, unpaid duties or penalties associated with this matter will have a material adverse effect on Plexus or the Company’s consolidated financial position, results of operations or cash flows.

Our operations are subject to federal, state, and local environmental regulations pertaining to air, water, and hazardous waste and the health and safety of our workplace. If we fail to comply with present and future regulations, we could be subject to liabilities or the suspension of business. These regulations could restrict our ability to expand our facilities or require us to acquire costly equipment or incur significant expense associated with the ongoing operation of our business or remediation efforts.

Our customers are also required to comply with various government regulations, legal requirements, and certification requirements, including many of the industry-specific regulations discussed above. Our customers’ failure to comply could affect their businesses, which in turn would affect our sales to them. In addition, if our customers are required by regulation or other requirements to make changes in their product lines, these changes could significantly disrupt particular programs for these customers and create inefficiencies in our business.

If we are unable to maintain our engineering, technological and manufacturing process expertise, our results may be adversely affected.

The markets for our manufacturing, engineering and other services are characterized by rapidly changing technology and evolving process developments. Our internal processes are also subject to these factors. The continued success of our business will depend upon our continued ability to:

Although we believe that our operations utilize the assembly and testing technologies, equipment and processes that are currently required by our customers, we cannot be certain that we will develop the capabilities

required by our customers in the future. The emergence of new technology, industry standards or customer requirements may render our equipment, inventory or processes obsolete or noncompetitive. In addition, we may have to acquire new design, assembly and testing technologies and equipment to remain competitive. The acquisition and implementation of new technologies and equipment may require significant expense or capital investment that could reduce our liquidity and negatively affect our operating results. Our failure to anticipate and adapt to our customers’ changing technological needs and requirements could have an adverse effect on our business.

An inability to successfully manage the procurement, development, implementation, or execution of information systems, or to adequately maintain these systems and their security, may adversely affect our business.

As a global company with a complex business model, we heavily depend on our information systems to support our customers’ requirements and to successfully manage our business. Any inability to successfully manage the procurement, development, implementation, execution or maintenance of our information systems, including matters related to system security, reliability, performance and access, as well as any inability of these systems to fulfill their intended purpose within our business, could have an adverse effect on our business. In addition, our failure to maintain adequate data security for both our and our customers’ financial, product and other information, could substantially affect our business, compliance with regulations and reputation in the industry.

Start-up costs and inefficiencies related to new, recent or transferred programs can adversely affect our operating results.

The management of labor and production capacity in connection with the establishment of new or recent programs and customer relationships, such as our arrangements with The Coca-Cola Company, and the need to estimate required resources in advance of production can adversely affect our gross and operating margins. These factors are particularly evident in the early stages of the life-cycle of new products and programs, which lack a track record of order volume and timing, as well as in program transfers between facilities. We are managing a number of new programs at any given time. Consequently, we are exposed to these factors. In addition, if any of these programs or customer relationships were terminated, our operating results could worsen, particularly in the short term.

The effects of these start-up costs and inefficiencies can also occur when we transfer programs between locations. We conduct these transfers on a regular basis to address factors such as meeting customer needs, seeking long-term efficiencies or responding to market conditions, as well as due to facility openings and closures. Although we try to minimize the potential losses arising from transitioning customer programs between Plexus facilities, there are inherent risks that such transitions can result in operational inefficiencies and the disruption of programs and customer relationships.

There may be problems with the products we design or manufacture that could result in liability claims against us and reduced demand for our services.

The products that we design and/or manufacture may be subject to liability or claims in the event that defects are discovered or alleged. We design and manufacture products to our customers’ specifications, many of which are highly complex. Despite our quality control and quality assurance efforts, problems may occur, or may be alleged, in the design and/or manufacturing of these products. Problems in the products we manufacture, whether real or alleged, whether caused by faulty customer specifications or in the design or manufacturing processes or by a component defect, and whether or not we are responsible, may result in delayed shipments to customers and/or reduced or cancelled customer orders. If these problems were to occur in large quantities or too frequently, our business reputation may also be tarnished. In addition, problems may result in liability claims against us, whether or not we are responsible. These potential claims may include damages for the recall of a product and/or injury to person or property.

Even if customers or third parties, such as component suppliers, are responsible for defects, they may not, or may not be able to, assume responsibility for any such costs or required payments to us. While we seek to insure against many of these risks, insurance coverage may be either inadequate or unavailable, either in general or for particular types of products. We occasionally incur costs defending claims, and any such disputes could affect our business relationships.

Intellectual property infringement claims against our customers or us could harm our business.

Our design and manufacturing services and the products offered by our customers involve the creation and use of intellectual property rights, which subject us and our customers to the risk of claims of intellectual property infringement from third parties. In addition, our customers may require that we indemnify them against the risk of intellectual property infringement. If any claims are brought against us or our customers for infringement, whether or not these have merit, we could be required to expend significant resources in defense of those claims. In the event of an infringement claim, we may be required to spend a significant amount of money to develop non-infringing alternatives

or obtain licenses. We may not be successful in developing alternatives or obtaining licenses on reasonable terms or at all. Infringement by our customers could cause them to discontinue production of some of their products, potentially with little or no notice, which may reduce our net sales to them and disrupt our production.

Additionally, if third parties on whom we rely for products or services, such as component suppliers, are responsible for an infringement (including through the supply of counterfeit parts), we may or may not be able to hold them responsible and we may incur costs in defending claims or providing remedies. Such infringements may also cause our customers to abruptly discontinue selling the impacted products, which would adversely affect our net sales of those products, and could affect our customer relationships more broadly. Similarly, claims affecting our suppliers could cause those suppliers to discontinue selling materials and components upon which we rely.

Our products are for end markets that require technologically advanced products with relatively short life-cycles.

Factors affecting the technology-dependent end markets that we serve, in particular short product life-cycles, could seriously affect our customers and, as a result, Plexus. These factors include:

Even if our customers successfully respond to these market challenges, their responses, including any consequential changes we must make in our business relationships with them and our production for them, can affect our production cycles, inventory management and results of operations.

Increased competition may result in reduced demand or reduced prices for our services.

The EMS industry is highly competitive and has become more so as a result of excess capacity in the industry. We compete against numerous EMS providers with global operations, as well as those which operate on only a local or regional basis. In addition, current and prospective customers continually evaluate the merits of manufacturing products internally and may choose to manufacture products themselves rather than outsource that process. Consolidations and other changes in the EMS industry result in a changing competitive landscape.

Some of our competitors have substantially greater managerial, manufacturing, engineering, technical, financial, systems, sales and marketing resources than ourselves. These competitors may:

We may operate at a cost disadvantage compared to other EMS providers that have lower internal cost structures or greater direct buying power with component suppliers, distributors and raw material suppliers. Our manufacturing processes are generally not subject to significant proprietary protection, and companies with greater resources or a greater market presence may enter our market or become increasingly competitive. Increased competition could result in significant price reductions, reduced sales and margins, or loss of market share.

We depend on our workforce, including certain key personnel, and the loss of key personnel or other personnel disruptions may harm our business.

Our success depends in large part on the continued services of our key technical and management personnel, and on our ability to attract, develop and retain qualified employees, particularly highly skilled design, process and test engineers involved in the development of new products and processes and the manufacture of products. The competition for these individuals is significant, and the loss of key employees could harm our business.

From time to time, there are changes and developments, such as retirements, disability, death and other terminations of service that affect our executive officers and other key employees. Transitions of responsibilities among officers and key employees, particularly those that are unplanned, inherently can cause disruptions to our business and operations, which could have an effect on our results.

We also depend on good relationships with our workforce generally. Any disruption in our relationships with our personnel, including as a result of potential union organizing activities, work actions or other labor issues, could substantially affect our operations and results.

In addition, when we expand operations in either existing areas or new locations, we need to retain the services of sufficient qualified personnel to conduct those operations. If we fail to retain and maintain sufficient qualified personnel, the operations at those locations, and consequently our financial results, could be adversely affected. In new or existing facilities we may be subject to local labor practices or union activities, differing employment laws and regulations in various countries, and other issues affecting our workforce, all of which could affect operations at particular locations, which also could have adverse effects on our operational results.

Natural disasters and other events outside our control, and the ineffective management of such events, may harm our business.

Some of our facilities are located in areas that may be impacted by natural disasters, including hurricanes, earthquakes, water shortages, tsunamis and floods. All facilities are subject to other natural or man-made disasters such as those related to global climate change, fires, acts of terrorism, breaches of security and failures of utilities. If such an event was to occur, our business could be harmed due to the event itself or due to our inability to effectively manage the effects of the particular event; potential harms include the loss of business continuity, the loss of business data and damage to infrastructure.

In addition, some of our facilities possess certifications necessary to work on specialized products that our other locations lack. If work is disrupted at one of these facilities, it may be impractical or we may be unable to transfer such specialized work to another facility without significant costs and delays. Thus, any disruption in operations at a facility possessing specialized certifications could adversely affect our ability to provide products and services to our customers, and thus negatively affect our relationships and financial results.

We have increased our borrowings, and we may fail to secure or maintain necessary financing.

Under our credit agreement (the “Credit Facility”) and Note Purchase Agreement , over the past several years we have borrowed $325 million in term loans and notes, of which $273 million was outstanding at October 1, 2011, and can borrow up to $200 million in revolving loans, of which $100 million is currently available, depending upon compliance with its defined covenants and conditions. The Credit Facility may be increased by an additional $100 million to a total of $200 million if we have not previously terminated all or any portion of the Credit Facility, there is no event of default existing under the Credit Facility and both we and the administrative agent consent to the increase. However, we cannot be certain that the credit facilities will provide all of the financing capacity that we will need in the future or that we will be able to change the credit facilities or revise covenants, if necessary or appropriate in the future, to accommodate changes or developments in our business and operations. In addition, as a consequence of the turmoil in the global financial markets and banking systems, it is possible that counterparties to our financial agreements, including our credit agreement and our interest rate swap agreements, may not be willing or able to meet their obligations.

Our future success may depend on our ability to obtain additional financing and capital to support possible future growth and future initiatives. For example, in fiscal 2011 we issued $175 million in principal amount of 5.20% senior notes, due in 2018, to support our share repurchase program. We may seek to raise capital by issuing additional common stock, other equity securities or debt securities, modifying our existing credit facilities or obtaining new credit facilities or a combination of these methods.

We may not be able to obtain capital when we want or need it, and capital may not be available on satisfactory terms. If we issue additional equity securities or convertible securities to raise capital, it may be dilutive to shareholders’ ownership interests. Furthermore, any additional financing may have terms and conditions that adversely affect our business, such as restrictive financial or operating covenants, and our ability to meet any financing covenants will largely depend on our financial performance, which in turn will be subject to general economic conditions and financial, business and other factors.

We may fail to successfully complete future acquisitions and may not successfully integrate acquired businesses, which could adversely affect our operating results.

We have previously grown, in part, through acquisitions. If we were to pursue future growth through acquisitions, this would involve significant risks that could have a material adverse effect on us. These risks include:

If we are unable to maintain effective internal control over our financial reporting investors could lose confidence in the reliability of our financial statements, which could result in a reduction in the value of our common stock.

As required by Section 404 of the Sarbanes-Oxley Act, the SEC adopted rules requiring public companies to include a report of management on the company’s internal control over financial reporting in their annual reports on Form 10-K; that report must contain an assessment by management of the effectiveness of our internal control over financial reporting. In addition, the independent registered public accounting firm auditing a company’s financial statements must attest to and report on the effectiveness of the company’s internal control over financial reporting.

We are continuing our comprehensive efforts to comply with Section 404 of the Sarbanes-Oxley Act. If we are unable to maintain effective internal control over financial reporting, this could lead to a failure to meet our reporting obligations to the SEC, which in turn could result in an adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements.

Our stock price has fluctuated significantly in recent periods. The price of our common stock may fluctuate in response to a number of events and factors relating to us, our competitors and the market for our services, many of which are beyond our control.

In addition, the stock market in general, and share prices for technology companies in particular, have from time to time experienced extreme volatility, including weakness, that sometimes has been unrelated to the operating performance of these companies. These broad market and industry fluctuations, and concerns affecting the economy generally, may adversely affect the market price of our common stock, regardless of our operating results.

Among other things, volatility and weakness in our stock price could mean that investors may not be able to sell their shares at or above the prices that they paid. Volatility and weakness could also impair our ability in the future to offer common stock or convertible securities as a source of additional capital and/or as consideration in the acquisition of other businesses.

Our facilities comprise an integrated network of engineering and manufacturing centers with our corporate headquarters located in Neenah, Wisconsin. We own or lease facilities with approximately 2.8 million square feet of capacity. This includes approximately 1.8 million square feet in the Americas region (“AMER”), approximately 0.9 million square feet in the Asia-Pacific region (“APAC”) and approximately 0.1 million square feet in the Europe, Middle East, and Africa region (“EMEA”). Approximately 0.2 million square feet of this capacity is subleased. Our facilities as of October 1, 2011, are described in the following table:

In fiscal 2011, we purchased land in Xiamen, China and began construction of an additional manufacturing facility, which is expected to be complete during the second half of fiscal 2012.

The Company began construction of an additional manufacturing facility in Penang, Malaysia during early fiscal 2011 and anticipates completing the facility in the first quarter of fiscal 2012.

During the first half of fiscal 2012, we anticipate announcing the construction of a larger facility in Oradea, Romania to replace the leased buildings.

We were notified in April 2009 by U.S. Customs and Border Protection (“CBP”) of its intention to conduct a customary Focused Assessment of our import activities during fiscal 2008 and of our processes and procedures to comply with U.S. Customs laws and regulations. During September 2010 the Company reported errors relating to import trade activity from July 2004 to the date of Plexus’ report. CBP has indicated that on-site fieldwork for the audit was completed as of June 2011 and the Company is currently awaiting final determination of CBP duties and fees. Plexus has agreed that it will implement improved processes and procedures and review these corrective measures with CBP. We recorded an accrual in other current accrued liabilities in the first quarter of fiscal 2010 when the amount became estimable and probable, which was not material to the financial statements. At this time, we do not believe that any deficiencies in processes or controls or unanticipated costs, unpaid duties or penalties associated with this matter will have a material adverse effect on Plexus or the Company’s consolidated financial position, results of operations or cash flows.

The Company is party to certain other lawsuits in the ordinary course of business. Management does not believe that these proceedings, individually or in the aggregate, will have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows.

The following table sets forth our executive officers, their ages and the positions currently held by each person:

Dean A. Foate joined Plexus in 1984 and has served as President and Chief Executive Officer since 2002, and as a director since 2000.

Ginger M. Jones has served as Plexus’ Vice President and Chief Financial Officer since 2007, and became a Senior Vice President in 2011. Prior to joining Plexus, Ms. Jones served as the Vice President and Corporate Controller for Banta Corporation from 2002 to 2007.

Michael D. Buseman joined Plexus in 2006 and began serving as Senior Vice President – Global Manufacturing Operations in 2007 and became Executive Vice President in 2011. Previously, he held various management roles in the Company including Vice President for Plexus Electronic Assembly – North American Operations and Vice President Manufacturing Technology and Quality.

Steven J. Frisch joined Plexus in 1990 and began serving as Regional President – Plexus EMEA in October 2010, while retaining his responsibilities as Senior Vice President – Global Engineering Solutions, which began in 2007. Previously, Mr. Frisch served as Vice President of Plexus Technology Group’s Raleigh and Livingston Design Centers from 2002 to 2007.

Todd P. Kelsey joined Plexus in 1994 and began serving as Senior Vice President – Global Customer Services in 2007 and was named Executive Vice President in 2011. Previously, Mr. Kelsey served as Vice President and then Senior Vice President of Plexus Technology Group from 2001 to 2007.

Yong Jin Lim joined Plexus in 2002 and began serving as Regional President – Plexus APAC in 2007. From 2003 to 2007 he served as Vice President of Operations – Asia.

Joseph E. Mauthe joined Plexus in 2007, began serving as Vice President – Global Human Resources in 2008 and was named a Senior Vice President in 2011. Prior to joining Plexus, Mr. Mauthe served as Senior Director, Human Resources and various other positions for Kimberly-Clark Corporation from 1985 to 2007.

Angelo M. Ninivaggi joined Plexus in 2002 and has served as Vice President, General Counsel and Secretary since 2006. Since 2007, Mr. Ninivaggi has also served as Corporate Compliance Officer and was named a Senior Vice President in 2011.

Michael T. Verstegen joined Plexus in 1983, serving in various engineering positions, and has served as Senior Vice President, Global Market Development since 2006. Prior thereto, Mr. Verstegen served as Vice President from 2002 to 2006.

For the fiscal years ended October 1, 2011 and October 2, 2010, the Company’s common stock has traded on the Nasdaq Stock Market, in the Nasdaq Global Select Market tier. The price information below represents high and low sale prices of our common stock for each quarterly period.

The following graph compares the cumulative total return on Plexus common stock with the Nasdaq Stock Market Index for U.S. Companies and the Nasdaq Stock Market Index for Electronic Components Companies, both of which include Plexus. The values on the graph show the relative performance of an investment of $100 made on September 29, 2006, in Plexus common stock and in each of the indices as of the last business day of the respective fiscal year.

As of November 11, 2011, there were approximately 630 shareholders of record. We have not paid any cash dividends. We currently anticipate that the majority of earnings in the foreseeable future will be retained to finance the development of our business. However, the Company evaluates from time to time potential uses of excess cash, which in the future may include share repurchases, a special dividend or recurring dividends. See also Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital Resources”, for a discussion of the Company’s intentions regarding dividends, and loan covenants which could restrict dividend payments.

The following table provides the specified information about the repurchases of shares by the Company during the three months ended October 1, 2011.

* On February 16, 2011 the Company’s Board of Directors approved a share repurchase program that authorized the Company to repurchase up to $200 million of common stock. The share purchases made during the fourth quarter of fiscal 2011 completed the repurchase program; a total of 6.3 million shares were purchased during fiscal 2011 at a volume-weighted average of $31.69 per share.

We have not paid cash dividends in the past and do not currently anticipate paying them in the future. However, the Company evaluates from time to time potential uses of excess cash, which in the future may include share repurchases, a special dividend or recurring dividends.

Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) participate in the Electronic Manufacturing Services (“EMS”) industry. We deliver optimized Product Realization solutions through a unique Product Realization Value Stream services model. This customer focused services model seamlessly integrates innovative product conceptualization, design, commercialization, manufacturing, fulfillment and sustaining services to deliver comprehensive end-to-end solutions for customers in the Americas, European and Asia-Pacific regions. Customer service is provided to over 130 branded product companies in the Wireline/Networking, Wireless Infrastructure, Medical, Industrial/Commercial and Defense/Security/Aerospace market sectors. Our customers’ products typically require exceptional production and supply-chain flexibility, necessitating an optimized demand-pull-based manufacturing and supply chain solution across an integrated global platform. Many of our customers’ products require complex configuration management and direct order fulfillment to their customers across the globe. In such cases we provide global logistics management and after-market service and repair. Our customers’ products may have stringent requirements for quality, reliability and regulatory compliance. We offer our customers the ability to outsource all phases of product realization, including product specifications; development, design and design verification; regulatory compliance support; prototyping and new product introduction; manufacturing test equipment development; materials sourcing, procurement and supply-chain management; product assembly/manufacturing, configuration and test; order fulfillment, logistics and service/repair.

We provide most of our contract manufacturing services on a turnkey basis, which means that we procure some or all of the materials required for product assembly. We provide some services on a consignment basis, which means that the customer supplies the necessary materials, and we provide the labor and other services required for product assembly. Turnkey services require material procurement and warehousing, in addition to manufacturing, and involve greater resource investments than consignment services. Other than certain test equipment and software used for internal operations, we do not design or manufacture our own proprietary products.

In response to the evolving markets and to better reflect our customers’ end markets, we have decided to combine our Wireline/Networking and Wireless Infrastructure market sectors and rename them as our Networking/Communications market sector, beginning with our fiscal 2012 reporting.

The following information should be read in conjunction with our consolidated financial statements included herein and “Risk Factors” included in Part I, Item 1A herein.

Fiscal 2011. Net sales for fiscal 2011 increased by $217.8 million, or 10.8 percent, from fiscal year 2010 to $2,231.2 million. Net sales increased in all of our market sectors during fiscal 2011, except for a decrease in the wireless infrastructure sector. The overall higher net sales were from both new and existing customers, such as the ramp of production for our newer industrial commercial sector customer, as well as an increase in net sales to Juniper Networks, Inc. (“Juniper”), our largest customer, as a result of improved end-market demand for the mix of Juniper products we produce as well as new product launches. We also experienced strong demand from a medical customer and a defense/security/aerospace customer during the year as a result of increased end market demand for the products they produce. These increases were partially offset by decreased net sales to two significant customers, one in the wireline/networking sector and one in the wireless infrastructure sector, related to previously announced disengagements as a result of acquisitions, and decreased sales from one additional wireless infrastructure customer as a result of a drop in end-market demand for the mix of its products that we produce.

Gross margin was 9.6 percent for fiscal 2011, which compared unfavorably to 10.3 percent for fiscal 2010. Gross margins in fiscal 2011 were lower as a result changes in our customer mix, higher fixed expenses related to higher headcount to support the revenue growth and increased depreciation expense. The prior year also included proceeds from a litigation settlement (see Note 12).

Selling and administrative expenses were $113.6 million for fiscal 2011, an increase of $6.3 million, or 5.9 percent, from the $107.3 million for fiscal 2010. The majority of the increase was due to higher employee compensation and relocation expense as a result of higher headcount to support revenue growth as well as higher stock based compensation expense. This was partially offset by lower variable incentive compensation in fiscal 2011 as

compared to fiscal 2010. Selling and administrative expenses were 5.1 percent of sales for fiscal 2011, as compared to 5.3 percent in fiscal 2010.

Other expense for fiscal 2011 decreased slightly from 2010, driven primarily by the favorable fluctuation in foreign currency translation, partially offset by increased interest expense.

Net income for fiscal 2011 was $89.3 million and diluted earnings per share were $2.30, which compared to net income of $89.5 million, or $2.19 per diluted share, for fiscal 2010. Net income decreased slightly from the prior year period due to changes in customer mix and higher fixed and selling and administrative expenses, partially offset by increased sales. Diluted earnings per share increased from the prior year period due to lower average shares outstanding related to our share repurchase program. The effective tax rate in the current year period was approximately 3 percent, which compares unfavorably to the 1 percent tax rate in the prior year period primarily due to the mix of the Company’s fiscal 2011 pre-tax income.

Fiscal 2010. Net sales for fiscal 2010 increased by $396.8 million, or 24.5 percent, from fiscal year 2009 to $2,013.4 million. Net sales increased in all of our market sectors during fiscal 2010, except for a slight decrease in the defense/security/aerospace sector. The overall higher net sales were driven primarily by stronger end-market conditions, as well as the ramp of production for new customer programs in the wireless infrastructure, wireline/networking, industrial/commercial, and medical sectors. These increases were partially offset by decreased net sales from two defense/security/aerospace sector customers, as well as decreased net sales to Juniper. Net sales to Juniper declined slightly as a result of decreased end-market demand for the mix of Juniper products produced by us.

Gross margin was 10.3 percent for fiscal 2010, which compared favorably to 9.6 percent for fiscal 2009. Gross margins in fiscal 2010 were higher due to the increased net sales, changes in customer mix and proceeds from a litigation settlement (see Note 12), partially offset by increases in variable incentive compensation expense due to strong financial performance as well as fixed expenses as a result of higher headcount.

Selling and administrative expenses were $107.3 million for fiscal 2010, an increase of $14.2 million, or 15.3 percent, from the $93.1 million for fiscal 2009. Sixty percent of the increase was due to higher variable incentive compensation in fiscal 2010 as compared to fiscal 2009. The remainder of the increase was driven primarily by increased employee compensation expense as a result of higher headcount to support revenue growth.

For fiscal 2010, the Company did not incur any restructuring or impairment charges as compared to charges of $8.6 million in fiscal 2009.

Net income for fiscal 2010 was $89.5 million and diluted earnings per share were $2.19, which compared favorably to net income of $46.3 million, or $1.17 per diluted share, for fiscal 2009. Net income increased from fiscal 2009 due to overall increased sales and higher gross margins and the absence of restructuring charges, offset by increased fixed expenses and selling and administrative expenses. The effective tax rate in fiscal 2010 was 1 percent, which compares unfavorably to the 2 percent tax benefit in fiscal 2009. The increase in effective tax rate from fiscal 2009 was primarily due to the mix of the Company’s fiscal 2010 pre-tax income and the absence in 2010 of a net $1.4 million tax benefit resulting from a discrete event that occurred in fiscal 2009.

Other. The effective income tax rates (benefits) for fiscal 2011, 2010 and 2009 were 3 percent, 1 percent and (2) percent, respectively. The increase in effective tax rate from fiscal 2009 to fiscal 2010 was primarily due to the mix of the Company’s fiscal 2010 pre-tax income and the absence in 2010 of a net $1.4 million tax benefit resulting from a discrete event that occurred in fiscal 2009. The change in our effective tax rate from fiscal 2010 to fiscal 2011 is primarily due to changes in the mix of income in the tax jurisdictions in which we operate.

ROIC. One of our metrics for measuring financial performance is after-tax ROIC. We define after-tax ROIC as tax-effected operating income, excluding unusual charges, divided by average capital employed over a rolling five quarter period. Capital employed is defined as equity plus debt, less cash and cash equivalents and short-term investments. ROIC was 15.6 percent, 19.5 percent and 13.2 percent for fiscal 2011, 2010 and 2009, respectively. See the table below for our calculation of ROIC (dollars in millions):


	Fiscal years ended
	October 1, 2011		October 2, 2010		October 3, 2009
Operating income (tax effected), excluding unusual charges		$ 98.1		$ 98.7		$ 59.9

Average invested capital		627.6		506.6		453.6

After-tax ROIC		15.6%		19.5%		13.2%

ROIC is a non-GAAP financial measure which should be considered in addition to, not as a substitute for, measures of the Company’s financial performance prepared in accordance with United States generally accepted accounting principles (“GAAP”). Non-GAAP financial measures, including ROIC, are used for internal management assessments because such measures provide additional insight into ongoing financial performance. In particular, we provide ROIC because we believe it offers insight into the metrics that are driving management decisions as well as management’s performance under the tests which it sets for itself.

For a reconciliation of ROIC to our financial statements that were prepared using GAAP, see Exhibit 99.1 to this annual report on Form 10-K, which exhibit is incorporated herein by reference.

Net sales. Net sales for the indicated periods were as follows (dollars in millions):

Net sales for fiscal 2011 increased $217.8 million, or 10.8 percent, as compared to fiscal 2010. The net sales increase resulted from higher net sales in all of our market sectors, except for a decrease in the wireless infrastructure sector. The net sales increase primarily related to the ramp of production for a newer industrial commercial sector customer. Net sales to Juniper increased as a result of improved end-market demand for the mix of Juniper products we produce as well as new product launches. Overall, we had net sales increases spread across new and existing customers in both the industrial commercial and medical sectors during fiscal 2011, which were partially offset by the two previously announced disengagements as a result of acquisitions (with one each in the wireline/networking and the wireless infrastructure market sectors), as well as decreased sales from one additional wireless infrastructure customer as a result of a drop in end-market demand for the mix of its products that we produce.

Net sales for fiscal 2010 increased $396.8 million, or 24.5 percent, as compared to fiscal 2009. The net sales increase resulted from higher net sales in all of our market sectors, except for the defense/security/aerospace sector. The overall higher net sales were driven primarily by strong end-market conditions, as well as the addition of new customers in the wireless infrastructure, wireline/networking, industrial/commercial and medical sectors. These net sales increases were offset in part by decreased net sales to two defense/security/aerospace customers, as well as lower net sales to Juniper as a result of a decline in end-market demand for the mix of Juniper products produced by us.

Our net sales percentages by market sector for the indicated periods were as follows:


	Fiscal years ended
	October 1, 2011		October 2, 2010		October 3, 2009
Wireline/Networking		39%		43%		44%
Wireless Infrastructure		7%		12%		11%
Medical		21%		20%		22%
Industrial/Commercial		24%		18%		13%
Defense/Security/Aerospace		9%		7%		10%

		100%		100%		100%

The percentages of net sales to customers representing 10 percent or more of net sales and net sales to our ten largest customers for the indicated periods were as follows:


	Fiscal years ended
	October 1, 2011		October 2, 2010		October 3, 2009
Juniper		17%		16%		20%
Top 10 customers		55%		57%		57%

Net sales to our largest customers may vary from time to time depending on the size and timing of customer program commencements, terminations, delays, modifications and transitions. We remain dependent on continued net sales to our significant customers, and our customer concentration with our top 10 customers remained at or above 53 percent during the year. We generally do not obtain firm, long-term purchase commitments from our customers. Customers’ forecasts can and do change as a result of changes in their end-market demand and other factors, including global economic conditions. Any material change in forecasts or orders from these major accounts, or other customers, could materially affect our results of operations. In addition, as our percentage of net sales to customers in a specific sector becomes larger relative to other sectors, we will become increasingly dependent upon the economic and business conditions affecting that sector.

In the current economic environment, we are seeing increased merger and acquisition activity that has impacted our customers. Specifically, we previously announced that two of our customers were acquired in the first quarter of fiscal 2010. The customer in the Wireline/Networking sector began to reduce orders to us at the end of fiscal 2010 and substantially disengaged in fiscal 2011. The customer in the Wireless Infrastructure sector began disengagement in fiscal 2011 and also substantially disengaged in fiscal 2011.

Gross profit. Gross profit and gross margin for the indicated periods were as follows (dollars in millions):

For fiscal 2011, gross profit and gross margin were impacted by the following factors:

For fiscal 2010, gross profit and gross margin were impacted by the following factors:

Design work performed by the Company is not the proprietary property of Plexus and substantially all costs incurred with this work are considered reimbursable by our customers. We do not track research and development costs that are not reimbursed by our customers and we consider these amounts immaterial.

Operating expenses. Selling and administrative (“S&A”) expenses for the indicated periods were as follows (dollars in millions):

For fiscal 2011, the increase in S&A expenses was due to increased employee compensation and relocation expense of approximately $8.1 million as a result of higher headcount to support revenue growth, as well as higher stock-based compensation expense of approximately $1.1 million. This was partially offset by lower variable incentive compensation in fiscal 2011 as compared to fiscal 2010 of approximately $4.1 million. S&A expenses as a percentage of net sales decreased during fiscal 2011 as a result of net sales expanding more quickly than these cost increases.

For fiscal 2010, sixty percent of the increase in S&A expenses was due to higher variable incentive compensation expense as a result of strong financial performance. The remainder of the increase was driven primarily by an increase in headcount to support our revenue growth. S&A expenses as a percentage of net sales decreased during fiscal 2010 as a result of net sales expanding more quickly than these cost increases.

Restructuring and asset impairment charges. For both fiscal 2011 and fiscal 2010, we did not incur any restructuring or asset impairment charges. Our restructuring and asset impairment costs for fiscal 2009 were as follows (dollars in millions):

The restructuring and asset impairment charges for fiscal 2009 were associated with various reportable segments. Management excludes such charges when analyzing the performance of the reportable segments. See Note 13 in Notes to Consolidated Financial Statements for certain financial information regarding our reportable segments, including a summary of restructuring and asset impairment charges by reportable segment.

Other income (expense). Other income (expense) for the indicated periods were as follows (dollars in millions):

Other income (expense) for fiscal 2011 decreased $0.1 million, to $9.1 million of expense from $9.2 million of expense in fiscal 2010. This change was driven by the favorable fluctuation in foreign currency translation and transaction adjustments of $2.4 million, partially offset by increased interest expense of $2.1 million, primarily related to our private placement debt, which we entered into during the third quarter of fiscal 2011 as discussed in “Liquidity and Capital Resources” below.

Other income (expense) for fiscal 2010 increased $1.5 million, to $9.2 million of expense from $7.7 million of expense in fiscal 2009. This change was driven by the unfavorable fluctuation in foreign currency translation and transaction adjustments of $2.1 million and reduced interest income of $0.9 million due to lower effective interest rates, partially offset by decreased interest expense of $1.3 million, primarily related to servicing the $150 million term loan drawn in April 2008.

Income taxes. Income taxes for the indicated periods were as follows (dollars in millions):

The change in our effective tax rate from fiscal 2009 to fiscal 2011 is primarily due to change in mix in the tax jurisdictions in which we operate.

As a result of using the with-and-without method under the requirements for accounting for stock-based compensation, the Company recorded a valuation allowance for federal and state taxes against the amount of net operating loss and credit carryforwards related to tax deductions in excess of compensation expense for stock options until such time as the related deductions actually reduce income taxes payable. As of the end of fiscal 2010 there was a valuation allowance of $1.0 million for federal and state taxes against the amount of net operating loss and credit carryforwards related to tax deductions in excess of compensation expense for stock options. During fiscal 2011 the Company recorded an additional valuation allowance $1.3 million. As a result, we had a remaining valuation allowance of approximately $2.3 million related to tax deductions associated with stock-based compensation as of October 1, 2011.

During the preparation of the Company’s fiscal 2011 consolidated financial statements, the Company performed an analysis of all available evidence, both positive and negative, regarding the need for a valuation allowance against our deferred tax assets, consistent with the provisions of ASC Topic 740, “Income Taxes.” The Company’s U.S. operations generated losses during the fiscal 2009, 2010 and 2011 years. While we believe these losses could be a significant factor in establishing such an allowance, we believe that based on the weight of all the evidence, both positive and negative, it is more likely than not that the Company will be able to utilize its U.S. net deferred tax assets of approximately $21.7 million. See Note 6 – Income Taxes for further details.

In addition, there was a remaining valuation allowance of $1.6 million as of October 2, 2010, related to various state deferred income tax assets for which utilization was uncertain due to a lack of sustained profitability and limited carryforward periods in those states. There was no change in the valuation allowance during fiscal 2011. If the U.S. operations continue to generate losses, there may be a need to provide a valuation allowance on our net U.S. deferred tax assets, which totaled $21.7 million as of October 1, 2011.

During fiscal 2011 the Company added a valuation allowance of $0.3 million and $0.9 million in the United Kingdom and Romania, respectively, to offset the increase in net deferred tax assets in those jurisdictions which more likely than not will not be realized.

We currently expect the annual effective tax rate for fiscal 2012 to be approximately 8 to 10 percent. The rate increase is due mainly to the increase in projected income in the United States and lower projected income in low tax Malaysia and China jurisdictions.

The Company has been granted tax holidays for its Malaysian and Xiamen, China subsidiaries. These tax holidays expire in 2024 and 2013, respectively, and are subject to certain conditions with which the Company expects to comply. In fiscal 2011, 2010 and 2009, these subsidiaries generated income, which resulted in tax reductions of approximately $21.7 million ($0.57 per basic share), $23.0 million ($0.58 per basic share) and $15.2 million ($0.38 per basic share), respectively.

Net Income. As a result of the above factors, our net income decreased by $0.3 million, or (0.3) percent, in fiscal 2011 as compared to fiscal 2010. Diluted earnings per share increased by 5.0 percent due to the effects of our fiscal 2011 stock repurchases. Net income increased by $43.2 million, or 93.3 percent, in fiscal 2010 compared to fiscal 2009; diluted earnings per share increased 87.2 percent.

In the first quarter of fiscal 2011, we completed our migration to a regional reporting structure, and as a result, modified our reportable segments. See Note 1 – Description of Business and Significant Accounting Policies for further information.

A further discussion of our fiscal 2011 and 2010 financial performance by reportable segment is presented below (dollars in millions):

Net sales for fiscal 2011 increased $60.2 million, or 4.8 percent, from fiscal 2010, which reflected the ramp of production for our newer industrial commercial sector customer. Net sales to Juniper also increased as a result

of improved end-market demand for the mix of Juniper products we produce in the region as well as new product launches. These increases were offset by reduced net sales to two significant wireless infrastructure customers, one as a result of a previously announced disengagement and the other as a result of a drop in end-market demand for the mix of products we produce for that customer. Operating income for fiscal 2011 decreased $5.7 million from fiscal 2010 due to the prior year period benefitting from a $3.2 million litigation settlement, as well as changes in customer mix in the current year.

Net sales for fiscal 2010 increased $160.4 million, or 14.8 percent, from fiscal 2009. This increase reflected higher end-market demand from numerous existing customers in each of our market sectors and the ramp of production for new customers in the wireline/networking, wireless infrastructure, industrial/commercial and medical sectors. These increases were partially offset by reduced net sales to our largest customer, Juniper, due to the transfer of manufacturing of some products to our APAC reportable segment, as well as decreased end-market demand for the mix of Juniper products produced by us. Operating income for fiscal 2010 increased $13.2 million from fiscal 2009 primarily as a result of higher revenues from the customers noted above, improved operating efficiencies resulting from higher production levels and proceeds received from a litigation settlement.

Net sales for fiscal 2011 increased $137.7 million, or 14.9 percent, over fiscal 2010. This growth reflected higher net sales to multiple customers across our market sectors as well as increased demand from a new customer in the industrial/commercial sector. These increases were partially offset by decreases in net sales from the previously announced disengagement of one customer in the wireline/networking sector as well as a drop in end-market demand for the mix of products we produce for a wireless infrastructure customer. Operating income improved $3.3 million in fiscal 2011 as compared to fiscal 2010, primarily as a result of the net sales growth, partially offset by changes in customer mix and higher fixed expenses.

Net sales for fiscal 2010 increased $337.3 million, or 57.4 percent, over fiscal 2009. This growth reflected higher net sales to multiple customers across our market sectors, increased demand from a new customer in the industrial/commercial sector and the transfer of the manufacturing of some Juniper products to the APAC reportable segment from the AMER reportable segment, partially offset by the decrease in demand from Juniper described above. Operating income improved $51.1 million in fiscal 2010 as compared to fiscal 2009, primarily as a result of the net sales growth and operating efficiencies resulting from higher production levels.

Net sales for fiscal 2011 increased $19.7 million, or 27.2 percent, from fiscal 2010. The change in net sales was driven by higher demand from two existing customer programs as well as the ramp of production for two new customers. Operating results were lower in the current year as compared to the prior year due to increased operating costs from our Romania facility and our new engineering facility in Darmstadt, Germany.

Net sales for fiscal 2010 increased $16.9 million, or 30.4 percent, from fiscal 2009. The change in net sales can be attributed to higher demand from the ramp of production for two existing customer programs in the industrial/commercial sector. Operating results were lower in the current year as compared to the prior year due to operating costs from our new Romania facility.

For our significant customers, we generally manufacture products in more than one location. For example, sales to Juniper occur in AMER and APAC. See Note 13 in Notes to Consolidated Financial Statements for certain financial information regarding our reportable segments, including a detail of net sales by reportable segment.

Cash flows provided by operating activities were $161.7 million for fiscal 2011, compared to cash flows provided by operating activities of $2.0 million and $170.3 million for fiscal 2010 and 2009, respectively. During fiscal 2011, the increase in cash flows provided by operating activities was primarily the result of improvements in working capital.

Inventory decreased by $36.6 million during fiscal 2011 as compared to fiscal 2010. Inventory turns increased to 4.3 turns in fiscal 2011 from 4.1 turns in fiscal 2010. Days in inventory changed favorably as of October 1, 2011 to 85 days as compared to 90 days at October 2, 2010. The decrease in inventory, both in dollars and days of cash cycle,

was the result of our efforts to actively manage our inventory levels down with the assistance of our customers, while continuing to meet our customers’ needs for flexibility and agility. As part of our continued efforts to mitigate inventory risk, we have collected approximately $29.8 million in cash deposits from our customers, which are classified as customer deposits on the Consolidated Balance Sheets, and have also continued to work with customers that have excess inventory issues in accordance with contractual obligations.

The overall decrease in accounts receivable of $27.2 million during fiscal 2011 as compared to fiscal 2010 was mainly due to two customers, one in each of the industrial/commercial and the wireline/networking sectors, prepaying their respective accounts in fiscal 2011. Our annualized days sales outstanding in accounts receivable for fiscal 2011 decreased favorably from 51 days in fiscal 2010 to 48 days in fiscal 2011.

Cash flows used in investing activities totaled $71.9 million for fiscal 2011. The primary investments included $74.1 million for purchases of property, plant and equipment, mainly in our APAC region, partially offset by proceeds from the sale of property, plant, and equipment. Investments were for new equipment to support customer demand in all of our regions as well as investments in new facilities in Penang, Malaysia and Xiamen, China to increase capacity. We expect our fourth Penang, Malaysia facility to be operational in our first quarter of fiscal 2012 and our second Xiamen, China facility to be operational in the second half of fiscal 2012. See Note 13 in Notes to Consolidated Financial Statements for further information regarding our capital expenditures by reportable segment. Fiscal 2011 purchases of property, plant and equipment included $48.1 million, $15.7 million, and $10.3 million related to our APAC, AMER, and EMEA reportable segments, respectively.

We utilized available cash and operating cash flows as the principal sources for funding our operating requirements during fiscal 2011. We currently estimate capital expenditures for fiscal 2012 to be approximately $90-95 million. A significant portion of the fiscal 2012 capital expenditures is anticipated to be used for the completion of the two facilities mentioned above (Penang, Malaysia and Xiamen, China). We also anticipate announcing, during the first half of fiscal 2012, the construction of a larger facility in Oradea, Romania to replace leased buildings that served as our start-up solution in lower-cost Europe.

Cash flows used in financing activities totaled $37.0 million for fiscal 2011, primarily due to purchases of common stock related to our stock repurchase program as well as payments on our term note and capital leases, offset by proceeds from our private placement debt issuance and proceeds from the exercise of stock options.

On February 16, 2011 the Company’s Board of Directors approved a share repurchase program that authorized the Company to repurchase up to $200 million of common stock. On August 15, 2011, the Company completed its share repurchase program with a total of 6.3 million shares purchased at a volume-weighted average of $31.69 per share. The Company did not repurchase any shares in fiscal 2010.

To support our new share repurchase program, we entered into a Note Purchase Agreement (the “Agreement”) for $175 million in principal amount of 5.20% Senior Notes, due June 15, 2018 (the “Notes”) during the third quarter of fiscal 2011. We issued $100 million in principal amount of the Notes on April 21, 2011, and the remaining $75 million on June 15, 2011. The Agreement includes operational and financial covenants which include a maximum total leverage ratio, a minimum interest coverage ratio and restrictions on additional indebtedness, liens and dispositions, all as defined in the Agreement. We are currently in compliance with all such covenants. Origination fees and expenses associated with the private placement totaled approximately $0.9 million and have been deferred. These origination fees and expenses are being amortized over the seven-year term of the Notes. Semi-annual interest payments began on June 15, 2011 and end on June 15, 2018 with full repayment of the total principal of the Notes.

During the second quarter of fiscal 2011, we entered into two separate treasury rate lock hedge contracts to hedge the variability of the fixed interest rate on the then forecasted issuance of $175 million of fixed rate debt using a treasury lock transaction. The fixed interest rates for each of these contracts are 2.77% and 2.72%, respectively, with a notional value of $150 million. On April 4, 2011, we entered into a final treasury rate lock hedge transaction for the remaining $25 million of exposure at a rate of 2.88%. On April 8, 2011, when the fixed interest rate for the debt issuance was determined, all three treasury rate lock contracts were settled and we received proceeds of $2.3 million, which is being amortized over the seven year term of the related debt.

On April 4, 2008, we entered into our credit agreement (the “Credit Facility”) with a group of banks which allows us to borrow $150 million in term loans and $100 million in revolving loans. The $150 million in term loans was immediately funded and the $100 million revolving credit facility is currently available. The Credit Facility is unsecured and may be increased by an additional $100 million to a total of $200 million (the “accordion feature”). This is possible if we have not previously terminated all or any portion of the Credit Facility, there is no event of default

existing under the credit agreement and both we and the administrative agent consent to the increase. The Credit Facility expires on April 4, 2013. Borrowings under the Credit Facility may be either through term loans or revolving or swing loans or letter of credit obligations. As of October 1, 2011, we had term loan borrowings of $97.5 million outstanding and no revolving borrowings under the Credit Facility.

The Credit Facility contains certain financial covenants, which include a maximum total leverage ratio, maximum value of fixed rentals and operating lease obligations, a minimum interest coverage ratio and a minimum net worth test, all as defined in the agreement. As of October 1, 2011, we were in compliance with all debt covenants. If we incur an event of default, as defined in the Credit Facility (including any failure to comply with a financial covenant), the group of banks has the right to terminate the Credit Facility and all other obligations, and demand immediate repayment of all outstanding sums (principal and accrued interest). The interest rate on the borrowing varies depending upon our then-current total leverage ratio; as of October 1, 2011, the Company could elect to pay interest at a defined base rate or the LIBOR rate plus 1.50%. Rates would increase upon negative changes in specified Company financial metrics and would decrease upon reduction in the current total leverage ratio to no less than LIBOR plus 1.00%. We are also required to pay an annual commitment fee on the unused credit commitment based on our leverage ratio; the current fee is 0.375%. Unless the accordion feature is exercised, this fee applies only to the initial $100 million of availability (excluding the $150 million of term borrowings). Origination fees and expenses associated with the Credit Facility totaled approximately $1.3 million and have been deferred. These origination fees and expenses will be amortized over the five-year term of the Credit Facility. Quarterly principal repayments on the term loan of $3.75 million each began June 30, 2008, and end on April 4, 2013, with a final balloon repayment of $75.0 million.

The Credit Facility allows for the future payment of cash dividends or the future repurchases of shares provided that no event of default (including any failure to comply with a financial covenant) exists at the time of, or would be caused by, the dividend payment or the share repurchases.

Additionally, the Company enters interest rate swaps and foreign currency derivatives to hedge against variable cash flows. All derivatives are recognized on the balance sheet at their estimated fair value. On the date a derivative contract is entered into, the Company designates the derivative as a hedge of a recognized asset or liability (a “fair value” hedge), a hedge of a forecasted transaction or of the variability of cash flows to be received or paid related to a recognized asset or liability (a “cash flow” hedge), or a hedge of the net investment in a foreign operation. The Company does not enter into derivatives for speculative purposes. Changes in the fair value of a derivative that qualify as a fair value hedge are recorded in earnings along with the gain or loss on the hedged asset or liability. Changes in the fair value of a derivative that qualifies as a cash flow hedge are recorded in “Accumulated other comprehensive income”, until earnings are affected by the variability of cash flows. Changes in the fair value of a derivative used to hedge the net investment in a foreign operation are recorded in the “Accumulated other comprehensive income” accounts within shareholders’ equity. See Note 5 – Derivatives and Fair Value Measurements for further details.

In February 2010, the Company negotiated the settlement of a capital lease in Kelso, Scotland. The termination of this capital lease obligation and acquisition of the property was effected through a cash payment by Plexus of $3.9 million.

Based on current expectations, we believe that our projected cash flows from operations, available cash and short-term investments, the Credit Facility, and our leasing capabilities should be sufficient to meet our working capital and fixed capital requirements for the next twelve months. $100 million of committed credit is currently available under the Credit Facility, with another $100 million available in an “accordion” facility, which is contingent upon compliance with the Credit Agreement and lender approval. If our future financing needs increase, we may need to arrange additional debt or equity financing. Accordingly, we evaluate and consider from time to time various financing alternatives to supplement our financial resources. However, particularly due to the current instability of the credit and financial markets, we cannot be certain that we will be able to make any such arrangements on acceptable terms.

Our disclosures regarding contractual obligations and commercial commitments are located in various parts of our regulatory filings. Information in the following table provides a summary of our contractual obligations and commercial commitments as of October 1, 2011 (dollars in millions):

Our accounting policies are disclosed in Note 1 of Notes to the Consolidated Financial Statements. During fiscal 2011, there were no material changes to these policies. Our more critical accounting policies are noted below:

Stock-Based Compensation – The Financial Accounting Standard Board (“FASB”) requires all share-based payments to employees, including grants of employee stock options, to be measured at fair value and expensed in the consolidated statements of operations over the service period (generally the vesting period) of the grant. We used the modified prospective application, under which compensation expense is only recognized in the consolidated statements of operations beginning with the first period that we adopted the FASB regulation and continuing to be expensed thereafter. We continue to use the Black-Scholes valuation model to value stock options. See Note 1 in Notes to Consolidated Financial Statements for further information.

Impairment of Long-Lived Assets – We review property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of property, plant and equipment is measured by comparing its carrying value to the projected cash flows the property, plant and equipment are expected to generate. If such assets are considered to be impaired, the impairment to be recognized is measured as the amount by which the carrying value of the property exceeds its fair market value. The impairment analysis is based on management’s assumptions, including future revenue and cash flow projections. Circumstances that may lead to impairment of property, plant and equipment include reduced expectations for future performance or industry demand and possible further restructurings.

Intangible Assets – During the second quarter of fiscal 2009, we recorded a goodwill impairment charge of $5.7 million, related to the Company’s sole goodwill asset. The impairment wrote off the entire carrying value of our goodwill related to our Kelso facility, which was the sole reporting unit in the EMEA reportable segment. The impairment charge was driven by adverse macroeconomic conditions that contributed to an overall reduction in demand for the Company’s offerings from the Kelso facility. These conditions led to an “interim triggering event”, leading management to perform an interim goodwill impairment test. This test resulted in the determination that the carrying value of the goodwill relating to Kelso was fully impaired and therefore an impairment charge of $5.7 million was taken.

Should we have goodwill and intangible assets with indefinite useful lives in the future, we would test those assets for impairment, at least annually, and recognize any related losses when incurred.

Revenue – Net sales from manufacturing services are recognized when the product has been shipped, the risk of ownership has transferred to the customer, the price to the buyer is fixed or determinable, and recoverability is reasonably assured. This point depends on contractual terms and generally occurs upon shipment of the goods from Plexus. Generally, there are no formal customer acceptance requirements or further obligations related to manufacturing services; if such requirements or obligations exist, then a sale is recognized at the time when such requirements are completed and such obligations fulfilled.

Net sales from engineering design and development services, which are generally performed under contracts with durations of twelve months or less, are typically recognized as costs are incurred utilizing the proportional performance model. The completed performance model is used if certain customer acceptance criteria exist. Any losses are recognized when anticipated.

Sales are recorded net of estimated returns of manufactured product based on management’s analysis of historical rates of returns, current economic trends and changes in customer demand. Net sales also include amounts billed to customers for shipping and handling, if applicable. The corresponding shipping and handling costs are included in cost of sales.

Derivatives and Hedging Activities – All derivatives are recognized on the balance sheet at their estimated fair value. On the date a derivative contract is entered into, the Company designates the derivative as a hedge of a recognized asset or liability (a “fair value” hedge), a hedge of a forecasted transaction or of the variability of cash flows to be received or paid related to a recognized asset or liability (a “cash flow” hedge), or a hedge of the net investment in a foreign operation. The Company does not enter into derivatives for speculative purposes. Changes in the fair value of a derivative that qualify as a fair value hedge are recorded in earnings along with the gain or loss on the hedged asset or liability. Changes in the fair value of a derivative that qualifies as a cash flow hedge are recorded in “Accumulated other comprehensive income”, until earnings are affected by the variability of cash flows. Changes in the fair value of a derivative used to hedge the net investment in a foreign operation are recorded in the “Accumulated other comprehensive income” accounts within shareholders’ equity. See Note 5 – Derivatives and Fair Value Measurements for further details.

Income Taxes – The Company accounts for income taxes in accordance with ASC Topic 740, “Income Taxes.” Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. Accordingly, the Company does not currently provide for additional U.S. and foreign income taxes which would become payable upon repatriation of undistributed earnings of certain foreign subsidiaries. The Company maintains valuation allowances when it is more likely than not that all or a portion of a deferred tax asset will not be realized. In determining whether a valuation allowance is required, the Company takes into account such factors as prior earnings history, expected future earnings, carryback and carryforward periods, and tax strategies that could

potentially enhance the likelihood of realization of a deferred tax asset. . If the U.S. operations continue to generate losses, there may be a need to provide a valuation allowance on our net U.S. deferred tax assets, which totaled $21.7 million as of October 1, 2011.

See Note 1 in Notes to Consolidated Financial Statements regarding recent accounting pronouncements.

We are exposed to market risk from changes in foreign exchange and interest rates. We selectively use financial instruments to reduce such risks.

We do not use derivative financial instruments for speculative purposes. Our policy is to selectively hedge our foreign currency denominated transactions in a manner that partially offsets the effects of changes in foreign currency exchange rates. We typically use foreign currency contracts to hedge only those currency exposures associated with certain assets and liabilities denominated in non-functional currencies. Corresponding gains and losses on the underlying transaction generally offset the gains and losses on these foreign currency hedges. Our international operations create potential foreign exchange risk. Beginning in July 2009, we entered into forward contracts to hedge a portion of our foreign currency denominated transactions in our APAC reportable segment and beginning in July 2011, we entered into forward contracts to hedge a portion of our foreign currency denominated transactions in Mexico, as described in Note 5 to Notes to Consolidated Financial Statements.

Our percentages of transactions denominated in currencies other than the U.S. dollar for the indicated periods were as follows:

The Company has evaluated the potential foreign currency exchange rate risk on transactions denominated in currencies other than the U.S. dollar for the periods presented above. Based on the Company’s overall currency exposure, as of October 1, 2011, a 10 percent change in the value of the U.S. dollar relative to our other transactional currencies would not have a material effect on the Company’s financial position, results of operations, or cash flows.

We have financial instruments, including cash equivalents and short-term investments as well as debt, which are sensitive to changes in interest rates. We consider the use of interest-rate swaps and treasury rate locks based on existing market conditions. We have entered into interest rate swaps for $97.5 million in term loans, as described in Note 5 in Notes to Consolidated Financial Statements. As is common with these types of agreements, our interest rate swap and treasury rate lock agreements are subject to the further risk that the counterparties to these agreements may fail to comply with their obligations thereunder.

The primary objective of our investment activities is to preserve principal, while maximizing yields without significantly increasing market risk. To achieve this, we maintain our portfolio of cash equivalents and short-term investments in a variety of highly rated securities, money market funds and certificates of deposit and limit the amount of principal exposure to any one issuer.

Our only material interest rate risk as of October 1, 2011, is associated with our Credit Facility under which we borrowed $150 million. Through the use of interest rate swaps, as described above, we have fixed the basis on which we pay interest, thus eliminating much of our interest rate risk. A 10 percent change in the weighted average interest rate on our average long-term borrowings would have had only a nominal impact on interest expense.

Disclosure Controls and Procedures: The Company maintains disclosure controls and procedures designed to ensure that the information the Company must disclose in its filings with the Securities and Exchange Commission (“SEC”) is recorded, processed, summarized and reported on a timely basis. The Company’s principal executive officer and principal financial officer have reviewed and evaluated, with the participation of the Company’s management, the Company’s disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) as of the end of the period covered by this report (the “Evaluation Date”). Based on such evaluation, the chief executive officer and chief financial officer have concluded that, as of the Evaluation Date, the Company’s disclosure controls and procedures are effective (a) in recording, processing, summarizing and reporting, on a timely basis, information required to be disclosed by the Company in the reports the Company files or submits under the Exchange Act, and (b) in assuring that information is accumulated and communicated to the Company’s management, including the chief executive officer and chief financial officer, as appropriate to allow timely decisions regarding required disclosure.

Management’s Annual Report on Internal Control Over Financial Reporting: Management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Management of the Company, including its chief executive officer and chief financial officer, has assessed the effectiveness of its internal control over financial reporting as of October 1, 2011, based on the criteria established in “Internal Control – Integrated Framework” issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”). Based on its assessment and those criteria, management of the Company has concluded that, as of October 1, 2011, the Company’s internal control over financial reporting was effective.

The independent registered public accounting firm of PricewaterhouseCoopers LLP has audited the Company’s internal control over financial reporting as of October 1, 2011, as stated in their report included herein on page 41.

Changes in Internal Control Over Financial Reporting: There have been no changes in the Company’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the Company’s most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

Limitations on the Effectiveness of Controls: Our management, including our chief executive officer and chief financial officer, does not expect that our disclosure controls and internal controls will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple errors or mistakes. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, a control may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

Notwithstanding the foregoing limitations on the effectiveness of controls, we have nonetheless reached the conclusion that our disclosure controls and procedures and our internal control over financial reporting are effective at the reasonable assurance level.

Information in response to this item is incorporated herein by reference to “Election of Directors” and “Corporate Governance” in the Company’s Proxy Statement for its 2012 Annual Meeting of Shareholders (“2012 Proxy Statement”) and “Executive Officers of the Registrant” in Part I hereof.

Our Code of Conduct and Business Ethics is posted on our website at www.plexus.com. You may access the Code of Conduct and Business Ethics by following the links under “Investor Relations, Corporate Governance” at our website. Plexus’ Code of Conduct and Business Ethics applies to all members of the board of directors, officers and employees.

Incorporated herein by reference to “Corporate Governance – Board Committees – Compensation and Leadership Development Committee,” “Corporate Governance – Directors’ Compensation,” “Compensation Discussion and Analysis,” “Executive Compensation” and “Compensation Committee Report” in the 2012 Proxy Statement.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

Incorporated herein by reference to “Security Ownership of Certain Beneficial Owners and Management” in the 2012 Proxy Statement.

The following table chart gives aggregate information regarding grants under all Plexus equity compensation plans through October 1, 2011:

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

Incorporated herein by reference to “Corporate Governance – Director Independence” and “Certain Transactions” in the 2012 Proxy Statement.

Incorporated herein by reference to the subheading “Auditors - Fees and Services” in the 2012 Proxy Statement.

NOTE: All other financial statement schedules are omitted because they are not applicable or the required information is included in the Consolidated Financial Statements or notes thereto.

In our opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of Plexus Corp. and its subsidiaries at October 1, 2011 and October 2, 2010, and the results of their operations and their cash flows for each of the three years in the period ended October 1, 2011 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the accompanying index presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of October 1, 2011, based on criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is responsible for these financial statements and financial statement schedule, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Annual Report on Internal Control Over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on these financial statements, on the financial statement schedule, and on the Company’s internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

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

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

for the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009

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

for the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009 (in thousands)

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

for the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009

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

Description of Business: Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) participate in the Electronic Manufacturing Services (“EMS”) industry. We deliver optimized Product Realization solutions through a unique Product Realization Value Stream services model. This customer focused services model seamlessly integrates innovative product conceptualization, design, commercialization, manufacturing, fulfillment and sustaining services to deliver comprehensive end-to-end solutions for customers in the Americas, European, and Asia-Pacific regions. Customer service is provided to over 130 branded product companies in the Wireline/Networking, Wireless Infrastructure, Medical, Industrial/Commercial and Defense/Security/Aerospace market sectors. Our customers’ products typically require exceptional production and supply-chain flexibility, necessitating an optimized demand-pull-based manufacturing and supply chain solution across an integrated global platform. Many of our customers’ products require complex configuration management and direct order fulfillment to their customers across the globe. In such cases we provide global logistics management and after-market service and repair. Our customers’ products may have stringent requirements for quality, reliability and regulatory compliance. We offer our customers the ability to outsource all phases of product realization, including product specifications; development, design and design verification; regulatory compliance support; prototyping and new product introduction; manufacturing test equipment development; materials sourcing, procurement and supply-chain management; product assembly/manufacturing, configuration and test; order fulfillment, logistics and service/repair.

Consolidation Principles and Basis of Presentation: The consolidated financial statements have been prepared in accordance with generally accepted accounting principles and include the accounts of Plexus Corp. and its subsidiaries. All intercompany transactions have been eliminated.

The Company’s fiscal year ends on the Saturday closest to September 30. The Company also uses a “4-4-5” weekly accounting system for the interim periods in each quarter. Each quarter, therefore, ends on a Saturday at the end of the 4-4-5 period. Periodically, an additional week must be added to the fiscal year to re-align with the Saturday closest to September 30. Fiscal 2009 included this additional week and the fiscal year ended on October 3, 2009. Therefore fiscal 2009 included 371 days. The additional week was added to the first fiscal quarter, ended January 3, 2009, which included 98 days. The accounting years for fiscal 2011 and 2010 each included 364 days.

In the first quarter of fiscal 2011, as previously announced, we completed our migration to a regional reporting structure. This change included establishing regional targets for various financial metrics, delegating additional authority to the regions to manage their business, and changing our related internal reporting. Given this change to regional reporting and management, as well as in the information used by management for assessing performance and allocating Company resources, we modified our reporting segments. Prior to fiscal 2011, the Company’s reportable segments consisted of the United States, Asia, Europe and Mexico. During the first quarter of fiscal 2011, we combined our United States and Mexico segments into the “Americas” (“AMER”) segment and renamed our Asia segment “Asia-Pacific” (“APAC”) and our Europe segment “Europe, Middle East and Africa” (“EMEA”) to better represent our long-range regional focus. As a result, we have conformed all prior period segment presentations to be consistent with our current reportable segments. See Note 13 - Reportable Segments, Geographic Information and Major Customers for further information.

Cash and Cash Equivalents: Cash equivalents are highly liquid investments purchased with an original maturity of less than three months.

Inventories: Inventories are valued at the lower of cost or market. Cost is determined by the first-in, first-out (“FIFO”) method. Valuing inventories at the lower of cost or market requires the use of estimates and judgment. Customers may cancel their orders, change production quantities or delay production for a number of reasons that are beyond the Company’s control. Any of these, or certain additional actions, could impact the valuation of inventory. Any actions taken by the Company’s customers that could impact the value of its inventory are considered when determining the lower of cost or market valuations.

Per contractual terms, customer deposits are received by the Company to offset obsolete and excess inventory risks.

Property, Plant and Equipment and Depreciation: These assets are stated at cost. Depreciation, determined on the straight-line method, is based on lives assigned to the major classes of depreciable assets as follows:

Certain facilities and equipment held under capital leases are classified as property, plant and equipment and amortized using the straight-line method over the lease terms and the related obligations are recorded as liabilities. Lease amortization is included in depreciation expense (see Note 3) and the financing component of the lease payments is classified as interest expense.

For the capitalization of software costs, the Company capitalizes significant costs incurred in the acquisition or development of software for internal use, including the costs of the software, consultants as well as payroll and payroll-related costs for employees directly involved in developing internal use computer software once the final selection of the software is made. Costs incurred prior to the final selection of software and costs not qualifying for capitalization are expensed as incurred.

Goodwill and Other Intangible Assets: During fiscal 2009, the Company recorded a goodwill impairment charge of $5.7 million, writing off the entire carrying value of its goodwill related to its Kelso, Scotland (“Kelso”) facility. The impairment charge was driven by macroeconomic conditions that contributed to an overall reduction in demand for the Company’s offerings from the Kelso facility. These conditions led to an “interim triggering event,” leading management to perform an interim goodwill impairment test. This test resulted in the determination that the carrying value of the goodwill relating to Kelso, the Company’s sole remaining goodwill asset, was fully impaired and therefore an impairment charge of $5.7 million was recorded.

Should the Company have goodwill and intangible assets with indefinite useful lives in the future, the Company would test those assets for impairment at least annually, and recognize any related losses when incurred. Recoverability of goodwill would be measured at the reporting unit level. The Company would measure the recoverability of goodwill under the annual impairment test by comparing the reporting unit’s carrying amount, including goodwill, to the reporting unit’s estimated fair market value, which would be primarily estimated using the present value of expected future cash flows, although market valuations may also be employed. If the carrying amount of the reporting unit exceeds its fair value, goodwill would be

considered impaired and a second test is performed to measure the amount of impairment. Circumstances that may lead to impairment of goodwill include, but are not limited to, the loss of a significant customer or customers and unforeseen reductions in customer demand, future operating performance or industry demand.

Impairment of Long-Lived Assets: Long-lived assets, including property, plant and equipment and intangible assets with finite lives are reviewed for impairment and written down to fair value when facts and circumstances indicate that the carrying value of long-lived assets may not be recoverable through estimated future undiscounted cash flows. If an impairment has occurred, a write-down to estimated fair value is made and the impairment loss is recognized as a charge against current operations. The impairment analysis is based on management’s assumptions, including future revenue and cash flow projections. Circumstances that may lead to impairment of property, plant and equipment include reduced expectations for future performance or industry demand and possible further restructurings, among others.

Revenue Recognition: Net sales from manufacturing services are recognized when the product has been shipped, the risk of ownership has transferred to the customer, the price to the buyer is fixed or determinable, and recoverability is reasonably assured. This point depends on contractual terms and generally occurs upon shipment of the goods from Plexus. Generally, there are no formal customer acceptance requirements or further obligations related to manufacturing services; if such requirements or obligations exist, then a sale is recognized at the time when such requirements are completed and such obligations are fulfilled.

Net sales from engineering design and development services, which are generally performed under contracts with a duration of twelve months or less, are typically recognized as program costs are incurred utilizing the proportional performance model. The completed performance model is used if certain customer acceptance criteria exist. Any losses are recognized when anticipated. Net sales from engineering design and development services were less than five percent of total sales in fiscal 2011, 2010 and 2009.

Sales are recorded net of estimated returns of manufactured products based on management’s analysis of historical returns, current economic trends and changes in customer demand. Net sales also include amounts billed to customers for shipping and handling. The corresponding shipping and handling costs are included in cost of sales.

Income Taxes: Deferred income taxes are provided for the difference between the financial statement balance of assets and liabilities and their respective tax basis. The Company records a valuation allowance against deferred income tax assets when management believes it is more likely than not that some portion or all of the deferred income tax assets will not be realized (see Note 6). Realization of deferred income tax assets is dependent on the Company’s ability to generate future taxable income. Recognition of deferred income tax assets is evaluated and tax reserves are recorded to address potential exposures related to income tax positions taken by the Company. These reserves are based on the assumptions and past experiences of the Company and provide for the uncertainty surrounding the application of statutes, rules, regulations, and interpretations to its income tax filings. It is possible that the actual costs or benefits relating to these matters may be materially more or less than the amount the Company estimated.

Foreign Currency Translation: We translate assets and liabilities of subsidiaries operating outside of the U.S. with a functional currency other than the U.S. dollar into U.S. dollars using exchange rates in effect at year-end. We translate net sales, expenses and cash flows at the average monthly exchange rates during the respective periods. Adjustments resulting from translation of the financial statements are recorded as a component of “Accumulated other comprehensive income”. Exchange gains and losses arising from transactions denominated in a currency other than the functional currency of the entity involved and remeasurement adjustments for foreign operations where the U.S. dollar is the functional currency are included in our Statements of Operations as a component of miscellaneous income (expense). Exchange gains (losses) on foreign currency transactions were $1.0 million, $(1.5) million, and $0.7 million for the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009, respectively.

Derivatives: The Company periodically enters into derivative contracts such as foreign currency forwards and interest rate swaps, which are designated as cash flow hedges. All derivatives are recognized on the balance sheet at their estimated fair value. On the date a derivative contract is entered into, the Company designates the derivative as a hedge of a recognized asset or liability (a “fair value” hedge), a hedge of a forecasted transaction or of the variability of cash flows to be received or paid related to a recognized asset or liability (a “cash flow” hedge), or a hedge of the net investment in a foreign operation. The Company

does not enter into derivatives for speculative purposes. Changes in the fair value of a derivative that qualifies as a fair value hedge are recorded in earnings along with the gain or loss on the hedged asset or liability. Changes in the fair value of a derivative that qualifies as a cash flow hedge are recorded in “Accumulated other comprehensive income” within shareholders’ equity, until earnings are affected by the variability of cash flows. Changes in the fair value of a derivative used to hedge the net investment in a foreign operation are recorded in “Accumulated other comprehensive income” within shareholders’ equity. Our interest rate swaps and forward contracts are treated as cash flow hedges and, therefore, $(0.4) million, $2.0 million and $(3.2) million were recorded in “Accumulated other comprehensive income” for fiscal 2011, 2010 and 2009, respectively.

Earnings Per Share: The computation of basic earnings per common share is based upon the weighted average number of common shares outstanding and net income. The computation of diluted earnings per common share reflects additional dilution from stock options and restricted stock, excluding any with an antidilutive effect.

Stock-based Compensation: The Company measures all share-based payments to employees, including grants of employee stock options, at fair value and expenses them in the Consolidated Statements of Operations over the service period (generally the vesting period) of the grant.

Comprehensive Income: The Company follows the established standards for reporting comprehensive income, which is defined as the changes in equity of an enterprise except those resulting from shareholder transactions.

Accumulated other comprehensive income consists of the following as of October 1, 2011 and October 2, 2010 (in thousands):

The change in fair market value of derivative instruments, net of tax adjustment that is recorded to “Accumulated other comprehensive income” is more fully explained in Note 5 – Derivatives and Fair Value Measurements.

Conditional Asset Retirement Obligations: We recognize a liability for the fair value of a conditional asset retirement obligation if the fair value can be reasonably estimated even though uncertainty exists about the timing and/or method of settlement. The liability is adjusted for any additions or deletions of related property, plant and equipment.

Use of Estimates: The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Fair Value of Financial Instruments: Accounts payable and accrued liabilities are reflected in the consolidated financial statements at cost because of the short-term duration of these instruments. Accounts receivable are reflected at net realizable value based on anticipated losses due to potentially uncollectible balances. Anticipated losses were based on management’s analysis of historical losses and changes in customers’ credit status. The fair value of capital lease obligations was approximately $15.8 million and $18.3 million as of October 1, 2011 and October 2, 2010, respectively. The fair value of the Company’s long-term debt was $274.3 million and $105.2 million as of October 1, 2011 and October 2, 2010, respectively. The fair values of the Company’s derivatives are disclosed in Note 5. The Company uses quoted market prices when available or discounted cash flows to calculate fair value.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (or exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The accounting guidance establishes a fair value hierarchy based on three levels of inputs that may be used to measure fair value. The input levels are:

Level 1: Quoted (observable) market prices in active markets for identical assets or liabilities.

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

Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the asset or liability.

Business and Credit Concentrations: Financial instruments that potentially subject the Company to concentrations of credit risk consist of cash, cash equivalents, trade accounts receivable and derivative instruments, specifically related to counterparties. In accordance with the Company’s investment policy, the Company’s cash, cash equivalents and derivative instruments were placed with recognized financial institutions. The Company’s investment policy limits the amount of credit exposure in any one issue and the maturity date of the investment securities that typically comprise investment grade short-term debt instruments. Concentrations of credit risk in accounts receivable resulting from sales to major customers are discussed in Note 13. The Company, at times, requires advanced cash deposits for services performed. The Company also closely monitors extensions of credit.

New Accounting Pronouncements: In June 2011, the Financial Accounting Standards Board (“FASB”) issued an amendment to comprehensive income guidance, which eliminates the option to present other comprehensive income (“OCI”) and its components in the statement of shareholders’ equity. The Company can elect to report components of comprehensive income in either (1) a continuous statement of comprehensive income or (2) two separate but consecutive statements. Under the two-statement approach, the first statement would include the components of net income, and the second statement would include the components of OCI. This guidance is effective for financial statements issued for fiscal years, and interim periods within those years, beginning after December 15, 2011. The adoption of this guidance is not anticipated to have a material impact on our consolidated results of operations, financial position and cash flows.

In May 2011, the FASB issued an amendment regarding common fair value measurement and disclosure requirements in U.S. GAAP and international financial reporting standards (“IFRS”). The amendments change the wording used to describe many of the requirements in U.S. GAAP for measuring fair value and for disclosing information about fair value measurements. To improve consistency in application across jurisdictions some changes in wording are necessary to ensure that U.S. GAAP and IFRS fair value measurement and disclosure requirements are described in the same way. The amendment also provides for additional accounting guidance and disclosures related to fair value measurements. This guidance is effective for financial statements issued for fiscal years, and interim periods within those years, beginning after December 15, 2011. The adoption of this guidance is not anticipated to have a material impact on our consolidated financial position, results of operations and cash flows.

In October 2009, the FASB issued new accounting guidance for Multiple-Deliverable Revenue Arrangements, which establishes a selling price hierarchy for determining the selling price of a deliverable, replaces the term “fair value” in the revenue allocation guidance with “selling price,” eliminates the residual method of allocation by requiring that arrangement consideration be allocated at the inception of the arrangement to all deliverables using the relative selling price method and requires that a vendor determine its best estimate of selling price in a manner that is consistent with that used to determine the price to sell the deliverable on a stand-alone basis. This guidance is effective for financial statements issued for fiscal years beginning after June 15, 2010. The Company adopted this guidance beginning October 3, 2010, and the

adoption did not have a material effect on the Company’s consolidated results of operations, financial position, and cash flows.

Inventories as of October 1, 2011 and October 2, 2010 consisted of (in thousands):

Per contractual terms, customer deposits are received by the Company to offset obsolete and excess inventory risks. The total amount of deposits related to inventory and included within current liabilities on the accompanying Consolidated Balance Sheets as of October 1, 2011 and October 2, 2010 were $29.8 million and $25.8 million, respectively.

Property, plant and equipment as of October 1, 2011 and October 2, 2010, consisted of (in thousands):

Assets held under capital leases and included in property, plant and equipment as of October 1, 2011 and October 2, 2010 consisted of (in thousands):

The building and improvements category in the above table includes a manufacturing facility in San Diego, California, which was closed during fiscal 2003 and is no longer used by the Company. The Company has subleased the facility. The San Diego facility is recorded at the net present value of the sublease income, net of cash outflows for broker commissions and building improvements associated with the subleases. The net book value of the San Diego facility is reduced on a monthly basis by the amortization of the sublease cash receipts, net of certain cash outflows associated with the subleases. The net book value of the San Diego facility is approximately $10.2 million as of October 1, 2011.

Amortization of assets held under capital leases totaled $0.9 million, $1.0 million, and $0.9 million for fiscal 2011, 2010 and 2009, respectively. There were no capital lease additions in fiscal 2011; additions were $0.9 million and $0.3 million for fiscal 2010 and 2009, respectively.

As of October 1, 2011 and October 2, 2010, accounts payable included approximately $12.3 million and $6.3 million, respectively, related to the purchase of property, plant and equipment, which have been treated as non-cash transactions for purposes of the Consolidated Statements of Cash Flows.

Debt and capital lease obligations as of October 1, 2011 and October 2, 2010, consisted of (in thousands):

The aggregate scheduled maturities of the Company’s debt obligations as of October 1, 2011, are as follows (in thousands):

The aggregate scheduled maturities of the Company’s obligations under capital leases as of October 1, 2011, are as follows (in thousands):

On April 4, 2008, the Company entered into its Credit Facility with a group of banks which allows the Company to borrow $150 million in term loans and $100 million in revolving loans. The $150 million in term loans was immediately funded and the $100 million revolving credit facility is currently available. The Credit Facility is unsecured and may be increased by an additional $100 million to a total of $200 million (the “accordion feature”). This is possible if the Company has not previously terminated all or any portion of the Credit Facility, there is no event of default existing under the credit agreement and both the Company and the administrative agent consent to the increase. The Credit Facility expires on April 4, 2013. Borrowings under the Credit Facility may be either through term loans, revolving or swing loans or letter of credit obligations. As of October 1, 2011, the Company has term loan borrowings of $97.5 million outstanding and no revolving borrowings under the Credit Facility. Average outstanding revolving borrowings for the fiscal year ended October 1, 2011 were $6.6 million, and there were no draws against the revolving credit facility during the fiscal year ended October 2, 2010.

The Credit Facility contains certain financial covenants, which include a maximum total leverage ratio, maximum value of fixed rentals and operating lease obligations, a minimum interest coverage ratio and a minimum net worth test, all as defined in the agreement. As of October 1, 2011, the Company was in compliance with all debt covenants. If the Company incurs an event of default, as defined in the Credit Facility (including any failure to comply with a financial covenant), the group of banks has the right to terminate the remaining Credit Facility and all other obligations, and demand immediate repayment of all outstanding sums (principal and accrued interest). The interest rate on borrowing varies depending upon the Company’s then-current total leverage ratio; as of October 1, 2011, the Company could elect to pay interest at a defined base rate or the LIBOR rate plus 1.50%. Rates would increase upon negative changes in specified Company financial metrics and would decrease upon reduction in the current total leverage ratio to no less than LIBOR plus 1.00%. The Company is also required to pay an annual commitment fee on the unused credit commitment based on its leverage ratio; the current fee is 0.375%. Unless the accordion feature is exercised, this fee applies only to the initial $100 million of availability (excluding the $150 million of term borrowings). Origination fees and expenses associated with the Credit Facility totaled approximately $1.3 million and have been deferred. These origination fees and expenses will be amortized over the five-year term of the Credit Facility. Quarterly principal repayments of the term loan of $3.75 million per quarter began June 30, 2008 and end on April 4, 2013 with a balloon repayment of $75.0 million.

The Credit Facility allows for the future payment of cash dividends or the future repurchases of shares provided that no event of default (including any failure to comply with a financial covenant) is existing at the time of, or would be caused by, a dividend payment or a share repurchase.

On April 21, 2011, the Company entered into a Note Purchase Agreement (the “Agreement”) with certain institutional investors related to $175 million in principal amount of 5.20% Senior Notes, due on June 15, 2018 (the “Notes”). The Company issued $100 million in principal amount of the Notes on April 21, 2011, and the remaining $75 million on June 15, 2011. The Agreement includes operational and financial covenants which include a maximum total leverage ratio, a minimum interest coverage ratio and restrictions on additional indebtedness, liens and dispositions, all as defined in the Agreement. As of October 1, 2011, the Company was in compliance with all debt covenants. The Notes are unsecured and rank at least equally and ratably in point and security with the other unsecured and unsubordinated financing facilities of the Company.

Our effective interest rate on the Notes after the treasury rate lock agreement discussed in Note 5 – Derivatives and Fair Value Measurements is 4.97%. Origination fees and expenses associated with the Agreement totaled approximately $0.9 million and have been deferred. These origination fees and expenses are being amortized over the seven-year term of the Notes. Semi-annual interest payments began on June 15, 2011, and end on June 15, 2018, with full repayment of the total principal of the Notes.

Interest expense related to the commitment fee and amortization of the deferred origination fees and expenses for the Credit Facility and Agreement totaled approximately $0.7 million in each of fiscal 2011, 2010 and 2009.

Cash paid for interest in fiscal 2011, 2010 and 2009 was $8.6 million, $9.2 million and $10.5 million, respectively.

All derivatives are recognized in the accompanying Consolidated Balance Sheets at their estimated fair values. On the date a derivative contract is entered into, the Company designates the derivative as a hedge of a recognized asset or liability (a “fair value” hedge), a hedge of a forecasted transaction or of the variability of cash flows to be received or paid related to a recognized asset or liability (a “cash flow” hedge), or a hedge of the net investment in a foreign operation. The Company currently has cash flow hedges related to variable rate debt and forecasted foreign currency payments. The Company does not enter into derivatives for speculative purposes. Changes in the fair value of the derivatives that qualify as cash flow hedges are recorded in “Accumulated other comprehensive income” in the accompanying Consolidated Balance Sheets until earnings are affected by the variability of the cash flows.

During the fourth quarter of fiscal 2011, the Company’s Mexican operations entered into forward exchange contracts on a rolling basis with a total notional value of $5.9 million as of October 1, 2011. These forward contracts will fix the exchange rates on foreign currency cash used to pay a portion of local currency expenses. The total fair value of these forward contracts was a $1.0 million liability as of October 1, 2011.

During the second quarter of fiscal 2011, the Company entered into forward exchange contracts to fix the exchange rates on foreign currency cash used to pay for capital expenditures related to the construction of our fourth facility in Malaysia. As of October 1, 2011, the total notional value of the forward contracts was $2.5 million and the total fair value of these forward contracts was a $0.1 million liability.

The Company’s Malaysian operations have also entered into forward exchange contracts on a rolling basis with a total notional value of $57.2 million as of October 1, 2011. These forward contracts will fix the exchange rates on foreign currency cash used to pay a portion of local currency expenses. The total fair value of these forward contracts was a $1.5 million liability as of October 1, 2011 and a $2.6 million asset as of October 2, 2010.

During the second quarter of fiscal 2011, the Company entered into two separate treasury rate lock contracts to hedge the variability of the fixed interest rate on the then forecasted issuance of $175 million of fixed rate debt using a treasury lock transaction. The fixed interest rates for each of these contracts were 2.77% and 2.72%, respectively, with a combined notional value of $150 million. On April 4, 2011, the Company entered into a final treasury rate lock transaction for the remaining $25 million of exposure at a rate of 2.88%. On April 8, 2011, when the fixed interest rate for the debt issuance was determined, all three treasury rate lock contracts were settled and the Company received proceeds of $2.3 million, which is being amortized over the seven year term of the related debt.

In June 2008, the Company entered into three interest rate swap contracts related to the $150 million in term loans under the Credit Facility that had an initial total notional value of $150 million and mature on April 4, 2013. These interest rate swap contracts will pay the Company variable interest at the three month LIBOR rate, and the Company will pay the counterparties a fixed interest rate. The fixed interest rates for each of these contracts are 4.415%, 4.490% and 4.435%, respectively. These interest rate swap contracts were entered into to convert $150 million of the variable rate term loan under the Credit Facility into fixed

rate debt. Based on the terms of the interest rate swap contracts and the underlying debt, these interest rate contracts were determined to be effective, and thus qualify as a cash flow hedge. The total fair value of these interest rate swap contracts was a $5.2 million liability as of October 1, 2011 and a $9.0 million liability as of October 2, 2010. As of October 1, 2011, the total remaining combined notional amount of the Company’s three interest rate swaps was $97.5 million.

The tables below present information regarding the fair values of derivative instruments (as defined in Note 1 – Basis of Presentation and Accounting Policies) and the effects of derivative instruments on the Company’s Consolidated Financial Statements:

The following table lists the fair values of the Company’s derivatives as of October 1, 2011, by input level as defined in Note 1 – Basis of Presentation and Accounting Policies:

The fair value of interest rate swaps and foreign currency forward contracts is determined using a market approach, which includes obtaining directly or indirectly observable values from third parties active in the relevant markets. The primary input in the fair value of the interest rate swaps is the relevant LIBOR forward curve. Inputs in the fair value of the foreign currency forward contracts include prevailing forward and spot prices for currency and interest rate forward curves.

The domestic and foreign components of income (loss) before income taxes for fiscal 2011, 2010 and 2009 consisted of (in thousands):

Income tax expense (benefit) for fiscal 2011, 2010 and 2009 consisted of (in thousands):

The following is a reconciliation of the federal statutory income tax rate to the effective income tax rates reflected in the Consolidated Statements of Operations for fiscal 2011, 2010 and 2009:

The Company recorded income tax expense of $2.8 million and $0.9 million for fiscal 2011 and fiscal 2010, respectively. The Company recorded income tax benefit of $(0.9) million for fiscal 2009. The increase to the income tax expense recorded in fiscal 2011 as compared to fiscal 2010 and fiscal 2009 is primarily due to the change in the mix of income in the tax jurisdictions in which we operate. The difference in our effective income tax rate as compared to our normal statutory rate is primarily due to the effect of pre-tax income in Malaysia and Xiamen, China, where we benefit from reduced effective tax rates due to tax holidays.

The components of the net deferred income tax asset as of October 1, 2011 and October 2, 2010, consisted of (in thousands):

The positive evidence relied upon is as follows: 1) orders for a new large U.S. industrial/commercial customer are currently projected to significantly increase in fiscal 2012, which we believe would result in income for the Company’s U.S. operations in fiscal 2012 and beyond; 2) the effect of the deep U.S. recession during this period was considered atypical; 3) the Company’s U.S. operations created cumulative pretax income for fiscal years 2006 through 2008 of more than $150

million; 4) the federal tax losses in fiscal 2009 and 2010 were able to be fully utilized through loss carrybacks to prior years; and 5) the federal loss carryforward at the end of fiscal 2011 has a 20 year carryforward period.

As a result of using the with-and-without method under the requirements for accounting for stock-based compensation, the Company recorded a valuation allowance for state taxes against the amount of net operating loss and credit carryforwards related to tax deductions in excess of compensation expense for stock options until such time as the related deductions actually reduce income taxes payable. The Company reversed approximately $0.1 million of this valuation allowance with corresponding credits to additional paid-in capital in fiscal 2009. As of the end of fiscal 2010 there was a valuation allowance of $1.0 million for federal and state taxes against the amount of net operating loss and credit carryforwards related to tax deductions in excess of compensation expense for stock options. During fiscal 2011 the Company recorded an additional valuation allowance of $1.3 million. As a result, we had a remaining valuation allowance of

approximately $2.3 million related to tax deductions associated with stock-based compensation as of October 1, 2011.

In addition, there is a remaining valuation allowance of $1.6 million as of October 1, 2011, related to various state deferred income tax assets where it is more likely than not that the asset will not be realized due to a lack of sustained profitability and limited carryforward periods in these states.

During fiscal 2011 the Company added a valuation allowance of $0.3 million and $0.9 million in the United Kingdom and Romania, respectively to offset the increase in net deferred tax assets in those jurisdictions which, more likely than not, will not be realized.

On November 1, 2009, Mexico adopted tax reform legislation that took effect January 1, 2010, and provides for a temporary increase in its income tax and value added tax rates from 28% to 30% and 15% to 16%, respectively, along with certain other changes. These laws did not have a material impact on our effective income tax rate in fiscal 2011, 2010 or 2009; however, they could have a material effect on future periods. On November 5, 2009, the United States adopted the “Worker, Homeownership, and Business Assistance Act of 2009”, which provides for an increase in the net operating loss carryback period from two years to five years for tax periods beginning or ending in calendar years 2008 and 2009, along with certain other tax law changes. This law did not have a material impact on our effective tax rate in fiscal 2011, 2010 or 2009 and we do not currently believe that it will create a material impact on our effective income tax rate in future periods.

In March 2007, the Chinese government made significant changes to its tax law with a bias toward a unified tax rate for domestic and foreign enterprises of 25 percent. The law was effective on January 1, 2008. The effect of the law on enterprises with agreed-upon incentives requires that their China federal taxes will be increased to the new unified tax rate over a five-year period that began in calendar 2008. This law did not have a material effect on our income taxes for our fiscal 2011, 2010 or 2009 tax years. However, depending upon the relative amount of income earned in China in the future, the increased tax rates on our China income could have a material effect.

On July 19, 2011, the United Kingdom enacted The Finance (No. 3) Act 2011, which reduced its corporate income tax rate from 28% to 26% effective April 1, 2011 and to 25% effective April 1, 2012. This law did not have a material impact on our effective income tax rate in fiscal 2011; however, it could have a material effect on future periods. In July 2005, the United Kingdom enacted the Finance Act (the “Finance Act”), which limits the deduction of interest expense incurred in the United Kingdom when the corresponding interest income earned by the other party is not taxable to such party. The Company currently extends loans from a U.S. subsidiary to a United Kingdom subsidiary, which is affected by the Finance Act. For fiscal years 2011, 2010 and 2009, management provided income tax expense for the effect of the Finance Act on the non-deductibility of this interest expense based on the current agreement with the tax authorities in the United Kingdom regarding the application of the Finance Act to the Company’s circumstances.

The Company has been granted tax holidays for its Malaysian and Xiamen, China subsidiaries. These tax holidays expire in 2024 and 2013, respectively, and are subject to certain conditions with which the Company expects to comply. In fiscal 2011, 2010 and 2009, these subsidiaries generated income, which resulted in tax reductions of approximately $21.7 million ($0.57 per basic share), $23.0 million ($0.58 per basic share) and $15.2 million ($0.38 per basic share), respectively.

The Company does not provide for taxes that would be payable if undistributed earnings of foreign subsidiaries were remitted because the Company considers these earnings to be invested for an indefinite period. The aggregate undistributed earnings of the Company’s foreign subsidiaries for which a deferred income tax liability has not been recorded was approximately $406.8 million as of October 1, 2011. If such earnings were repatriated, additional tax expense may result, although the calculation of such additional taxes is not practicable at this time.

As of October 1, 2011, the Company had approximately $75.6 million of state net operating loss carryforwards that expire between fiscal 2012 and 2029.

Cash refund for income taxes in fiscal 2011 was $2.2 million, and cash paid for income taxes in fiscal 2010 and 2009 was $3.5 million and $2.9 million, respectively.

The Company has approximately $7.4 million of uncertain tax benefits as of October 1, 2011. The Company has classified these amounts in the Consolidated Balance Sheets as “Other liabilities” (noncurrent) to the extent that payment is not anticipated within one year. Presented below is a reconciliation of the beginning and ending amounts of unrecognized income tax benefits (in thousands):

Approximately $6.3 million and $4.8 million, respectively of the balance as of October 1, 2011, and October 2, 2010 would reduce the Company’s effective tax rate if recognized.

The Company recognizes accrued interest and penalties related to unrecognized tax benefits in income tax expense. The total accrued penalties and net accrued interest with respect to income taxes was approximately $0.7 million, $0.5 million and $0.3 million as of October 1, 2011, October 2, 2010 and October 3, 2009, respectively. The Company recognized $0.2 million of expense for accrued penalties and net accrued interest in the Consolidated Statements of Operations for the fiscal year ended October 1, 2011.

During the second quarter of fiscal 2009, tax expense decreased by approximately $1.4 million, consisting of approximately $1.6 million, including interest, related to the conclusion of federal and state audits, which resulted in a reduction of the liability related to uncertainty in income taxes, offset by an additional provision of $0.2 million for changes in state tax laws.

It is reasonably possible that a number of uncertain tax positions related to federal and state tax positions may be settled within the next 12 months. Settlement of these matters is not expected to have a material effect on the Company’s consolidated results of operations, financial position and cash flows.

The Company files income tax returns, including returns for its subsidiaries, with federal, state, local and foreign taxing jurisdictions. The following tax years remain subject to examination by the respective major tax jurisdictions:

On February 16, 2011 the Company’s Board of Directors approved a share repurchase program that authorized the Company to repurchase up to $200 million of common stock. On August 15, 2011, the Company completed its share repurchase program; a total of 6.3 million shares were purchased at a volume-weighted average of $31.69 per share.

Pursuant to the Company’s Rights Agreement, each preferred share purchase right (a “Right”) entitles the registered holder to purchase from the Company one one-hundredth of a share of the Company’s Series B Junior Participating Preferred Stock, $0.01 par value per share (“Preferred Share”), at a price of $125.00 per one one-hundredth of a Preferred Share, subject to adjustment. The Rights are exercisable only if a person or group acquires beneficial ownership of more than 20% of the Company’s outstanding common stock or commences, or announces an intention to make, a tender offer or exchange offer that would result in such person or group acquiring the beneficial ownership of more than 20% of the Company’s common stock. The Rights expire on August 28, 2018, subject to extension.

The following is a reconciliation of the amounts utilized in the computation of basic and diluted earnings per share (in thousands, except per share amounts):


	Fiscal Years Ended
	October 1, 2011		October 2, 2010		October 3, 2009
Earnings:
Net income	$	89,256	$	89,533	$	46,327


Basic weighted average common shares outstanding		38,063		40,051		39,411
Dilutive effect of stock options		737		780		243

Diluted weighted average shares outstanding		38,800		40,831		39,654


Earnings per share:
Basic	$	2.34	$	2.24	$	1.18

Diluted	$	2.30	$	2.19	$	1.17

In fiscal 2011, 2010 and 2009, stock options and stock-settled stock appreciation rights (‘SARs”) to purchase approximately 1.3 million, 1.2 million and 2.7 million shares, respectively, were outstanding but were not included in the computation of diluted earnings per share because the options’ and SARs’ exercise prices were greater than the average market price of our common shares and, therefore, their effect would be

antidilutive. In fiscal 2009, restricted stock units (“RSUs”) of approximately 20,000 were outstanding but were not included in the computation of diluted earnings per share because their effect would have been anti-dilutive. In fiscal 2011 and fiscal 2010 there were no anti-dilutive RSUs outstanding.

The Company has a number of operating lease agreements primarily involving manufacturing facilities, manufacturing equipment and computerized design equipment. These leases are non-cancelable and expire on various dates through 2021. Rent expense under all operating leases for fiscal 2011, 2010 and 2009 was approximately $12.8 million, $11.8 million and $11.9 million, respectively. Renewal and purchase options are available on certain of these leases.

Future minimum annual payments on operating leases are as follows (in thousands):

Fiscal 2011 and fiscal 2010 restructuring and asset impairment charges: For fiscal 2011 and fiscal 2010, the Company did not incur any restructuring or impairment charges.

Fiscal 2009 restructuring and asset impairment charges: For fiscal 2009, we recorded pre-tax restructuring and asset impairment charges of $8.6 million, related to goodwill impairment in our EMEA reportable segment, the closure of our Ayer, Massachusetts (“Ayer”) facility and the reduction of our workforce across our facilities in the United States and Juarez, Mexico (“Juarez”). The details of these fiscal 2009 restructuring actions are listed below:

Goodwill Impairment: During the second quarter of fiscal 2009, the Company recorded a goodwill impairment charge of $5.7 million, writing off the entire carrying value of our goodwill related to our Kelso, Scotland (“Kelso”) facility. The impairment charge was driven by macroeconomic conditions that contributed to an overall reduction in demand for the Company’s offerings from the Kelso facility. These conditions led to an “interim triggering event”, leading management to perform an interim goodwill impairment test. This test resulted in the determination that the carrying value of the goodwill relating to Kelso was fully impaired and therefore an impairment charge of $5.7 million was recorded.

Ayer Facility Closure: During the third quarter of fiscal 2009, we closed our Ayer facility. In fiscal 2009, we recorded pre-tax restructuring charges of $0.4 million, related to the disposal of certain assets and costs to exit this leased facility.

Other Restructuring Charges. In fiscal 2009, we recorded pre-tax restructuring charges of $2.0 million related to severance at facilities in the United States as well as Juarez. These workforce reductions affected approximately 450 employees. We also recorded approximately $0.5 million of asset impairment charges at Corporate.

A detail of restructuring and asset impairment charges are provided below (in thousands):


	Employee Termination and Severance Costs				Lease Obligations and Other Exit Costs				Non-cash Asset Impairments				Total

Accrued balance, September 27, 2008		$	2,038			$	-			$	-			$	2,038

Restructuring and asset impairments charges			2,196				876				5,748				8,820
Adjustment to provisions			(249	)			-				-				(249	)
Amount utilized			(3,941	)			(790	)			(5,748	)			(10,479	)

Accrued balance, October 3, 2009		$	44			$	86			$	-			$	130

The remaining balance as of October 3, 2009 of $0.1 million was utilized in fiscal 2010 and no further accruals were recorded in fiscal 2011 or 2010.

For a detail of restructuring and asset impairment charges by reportable segment, see Note 13 – Reportable Segments, Geographic Information and Major Customers.

401(k) Savings Plan: The Company’s 401(k) Savings Plan covers all eligible U.S. employees. Effective January 1, 2010, the Company began matching employee contributions up to 4 percent of eligible earnings. Previously, the Company matched employee contributions up to 2.5 percent of eligible earnings. The Company’s contributions for fiscal 2011, 2010 and 2009 totaled $5.8 million, $4.9 million and $2.9 million, respectively.

Stock-based Compensation Plans: The Company’s shareholders approved the Plexus Corp. 2008 Long-Term Incentive Plan (the “2008 Plan”), which was last approved by shareholders in February 2011, is a stock-based incentive plan for officers, key employees and directors; the 2008 Plan includes provisions by which the Company may grant stock-based awards, including stock options, stock-settled stock appreciation rights (“SARs”), restricted stock, restricted stock units (“RSUs”), unrestricted stock awards (“SAs”) and performance stock awards, in addition to cash incentive awards, to directors, executive officers and other officers and key employees. The maximum number of shares of Plexus common stock which may be issued pursuant to the 2008 Plan is 5,500,000 shares; in addition, cash incentive awards of up to $4.0 million may be granted annually. The exercise price of each stock option and SAR granted must not be less than the fair market value on the date of grant. The Compensation and Leadership Development Committee (the “Committee”) of the Board of Directors may establish a term and vesting period for stock options, SARs, RSUs and other awards under the 2008 Plan as well as accelerate the vesting of such awards. Generally, stock options vest in two annual installments and have a term of ten years, SARs vest in two annual installments and have a term of seven years, and RSUs fully vest on the third anniversary of the grant date (assuming continued employment), which is also the date as of which the underlying shares will be issued.

The 2008 Plan replaced the shareholder-approved 2005 Equity Incentive Plan (the “2005 Plan”). The 2005 Plan constituted a stock-based incentive plan for the Company and included provisions by which the Company could grant stock-based awards to directors, executive officers and other officers and key employees. The exercise price of each stock option granted must not have been less than the fair market value on the date of grant. The 2005 Plan terminated upon the approval of the 2008 Plan, except that outstanding awards continue until expiration.

Individual stock option and SARs grants are determined annually, but granted on a quarterly basis. However, grants of RSUs are generally made only on an annual basis. Beginning in fiscal 2011, the Company discontinued the use of long-term cash awards and increased the number of RSUs to provide equivalent value. In fiscal 2009, the Company made a special grant consisting solely of RSUs to certain key

employees (excluding our Chief Executive Officer) to encourage retention, but did not make similar special grants in fiscal 2011 or fiscal 2010.

For options issued to the members of the Board of Directors in fiscal 2009, 50 percent of their stock options vested immediately at the date of grant and their remaining stock options vested on the first anniversary of the grant date. Options issued to the members of the Board of Directors in fiscal 2011 and 2010 vested immediately on the date of grant. In fiscal 2011 and fiscal 2010, the Company granted members of the board of directors SAs, which vested immediately on grant.

In fiscal 2011, under the 2008 Plan, the Company granted options, which had a term of ten years, to purchase 0.3 million shares of the Company’s common stock and 0.3 million stock-settled SARs, which had a term of seven years. Additionally, the Committee made awards of RSUs for 0.1 million shares of common stock, all of which vest on the third anniversary of grant, and the Committee granted SAs for 0.1 million shares of common stock.

In fiscal 2010, under the 2008 Plan, the Company granted options, which had a term of ten years, to purchase 0.3 million shares of the Company’s common stock and 0.3 million stock-settled SARs, which had a term of seven years. Additionally, the Committee made awards of RSUs for 0.1 million shares of common stock and long-term cash awards that totaled $0.9 million, all of which vest on the third anniversary of grant. In addition, in fiscal 2010, the Committee granted SAs for 0.1 million shares of common stock.

In fiscal 2009, under the 2008 Plan, the Company granted options, which had a term of ten years, to purchase 0.3 million shares of the Company’s common stock and 0.3 million stock-settled SARs, which had a term of seven years. Additionally, the Committee made awards of RSUs for 0.2 million shares of common stock and long-term cash awards that totaled $1.0 million, all of which vest on the third anniversary of grant.

The Company recognized $11.0 million, $9.5 million, and $9.4 million of compensation expense associated with stock options, SARs, RSUs and SAs for the fiscal years ended October 1, 2011, October 2, 2010 and October 3, 2009, respectively. The related deferred tax benefit recognized was $3.7 million, $3.2 million, and $2.4 million for the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009, respectively.


	Number of Options/SARs (in thousands)			Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)

Outstanding as of September 27, 2008		3,393			$ 25.88

Granted		614			19.71
Cancelled		(166	)		28.75
Exercised		(223	)		15.43
Outstanding as of October 3, 2009		3,618			$ 25.34

Granted		603			32.29
Cancelled		(122	)		34.18
Exercised		(910	)		25.80
Outstanding as of October 2, 2010		3,189			$ 26.18

Granted		641			31.01
Cancelled		(110	)		34.87
Exercised		(501	)		20.78
Outstanding as of October 1, 2011		3,219			$ 27.69		$ 5,637

Number of

Options/SARs

(in thousands)

Weighted

Average Exercise

Price

Aggregate

Intrinsic Value

(in thousands)

Exercisable as of:

October 3, 2009

2,815

$ 26.36

October 2, 2010

2,365

$ 25.37

October 1, 2011

2,383

$ 26.38

$ 5,637

Included in the table above are 344,920, 335,022, and 310,071 SARs, which were granted in fiscal 2011, 2010 and 2009, respectively.

The following table summarizes outstanding stock option and SAR information as of October 1, 2011 (Options/SARs in thousands):


Range of Exercise Prices		Number of Options/SARs Outstanding		Weighted Average Exercise Price		Weighted Average Remaining Life		Number of Options/SARs Exercisable		Weighted Average Exercise Price
	$8.97 - $14.63		372		$ 13.34		4.0		372		$ 13.34
	$14.64 - $20.95		362		$ 18.06		4.7		362		$ 18.06
	$20.96 - $29.84		1,231		$ 25.68		5.6		891		$ 24.84
	$29.85 - $42.52		1,254		$ 36.69		6.3		758		$ 38.56
	$ 8.97 - $42.52		3,219		$ 27.69		5.6		2,383		$ 26.38

The Company continues to use the Black-Scholes valuation model to value options and SARs. The Company used its historical stock prices as the basis for its volatility assumptions. The assumed risk-free rates were based on U.S. Treasury rates in effect at the time of grant with a term consistent with the expected option and SAR lives. The expected option and SAR lives represent the period of time that the options and SARs granted are expected to be outstanding and were based on historical experience.

The weighted average fair value per share of options and SARs issued for the fiscal years ended October 1, 2011, October 2, 2010 and October 3, 2009 were $13.40, $14.25 and $8.72, respectively. The fair value of each option and SAR grant was estimated at the date of grant using the Black-Scholes option-pricing model based on the assumption ranges below:

The fair value of options and SARs vested for fiscal years ended October 1, 2011, October 2, 2010 and October 3, 2009 were $3.6 million, $3.1 million and $6.3 million, respectively.

For the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009, the total intrinsic value of options and SARs exercised was $6.5 million, $8.5 million and $1.2 million, respectively.

As of October 1, 2011, there was $7.7 million of unrecognized compensation cost related to non-vested options and SARs that is expected to be recognized over a weighted average period of 1.29 years.


	Number of Shares (in thousands)			Weighted Average Fair Value at Date of Grant			Aggregate Intrinsic Value (in thousands)

Units outstanding as of September 27, 2008		99			$	30.54

Granted		210				21.73
Cancelled		(11	)			24.86
Vested		-				-

Units outstanding as of October 2, 2009		298			$	24.54

Granted		115				33.99
Cancelled		(12	)			26.95
Vested		(16	)			33.99

Units outstanding as of October 2, 2010		385			$	26.90

Granted		155				27.14
Cancelled		(18	)			25.92
Vested		(98	)			31.27

Units outstanding as of October 1, 2011		424			$	26.02		$	9,749

The Company uses the fair value at the date of grant to value RSUs and SAs. The fair value of RSUs and SAs that vested for the fiscal year ended October 1, 2011 was $0.6 million. There was 88,112 RSUs and 10,000 SAs that vested during the fiscal year ended October 1, 2011. There were not any RSUs and 16,000 SAs that vested during the fiscal year ended October 2, 2010 and there were not any RSUs or SAs that vested during the fiscal year ended October 3, 2009.

As of October 1, 2011, there was $5.1 million of unrecognized compensation cost related to RSU awards that is expected to be recognized over a weighted average period of 1.8 years.

Deferred Compensation Arrangements: The Company has agreements with certain of its former executive officers to provide nonqualified deferred compensation. Under those agreements, the Company agreed to pay to these former executives, or their designated beneficiaries upon such executives’ deaths, certain amounts annually for the first 15 years subsequent to their retirements. In August 2009, amendments were entered into in order to align the provisions regarding the determination of payment amounts to a fixed 15-year annual installment payment stream. The amendments were consistent with the intent of the original agreements and with the manner in which the agreements had operated in practice.

The Company has a supplemental executive retirement plan (the “SERP”) as an additional deferred compensation plan for executive officers and other key employees. Under the SERP, a covered executive may elect to defer some or all of the participant’s compensation into the plan, and the Company may credit the participant’s account with a discretionary employer contribution. Participants are entitled to payment of deferred amounts and any related earnings upon termination or retirement from Plexus.

The SERP operates under a rabbi trust arrangement (the “Trust”). The Trust allows investment of deferred compensation held on behalf of the participants into individual accounts and, within these accounts, into one or more designated investments. Investment choices do not include Plexus stock. In fiscal 2011, 2010 and 2009, the Company made contributions to the participants’ SERP accounts in the amount of $0.3 million, $0.2 million and $0.2 million, respectively.

As of October 1, 2011 and October 2, 2010, the SERP assets held in the Trust totaled $6.2 million and $6.0 million, respectively, and the related liability to the participants totaled approximately $3.9 million and $4.0 million as of October 1, 2011 and October 2, 2010, respectively. The Trust assets are subject to the

claims of the Company’s creditors. The Trust assets and the related liabilities to the participants are included in non-current “Other assets” and non-current “Other liabilities”, respectively, in the accompanying Consolidated Balance Sheets.

Other: The Company currently does not and is not obligated to provide any postretirement medical or life insurance benefits to employees.

In fiscal 2010, the Company incurred approximately $1.1 million of costs relating to non-conforming inventory received from a supplier. The Company reached a settlement with the supplier during the first quarter of fiscal 2011 for $0.9 million, which was received and recorded in selling and administrative expenses in fiscal 2011.

In December 2009, the Company received settlement funds of approximately $3.2 million related to a court case in which the Company was a plaintiff. The settlement related to prior purchases of inventory and therefore was recorded as a reduction of cost of sales.

Reportable segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker, or group, in assessing performance and allocating resources.

The Company uses an internal management reporting system, which provides important financial data to evaluate performance and allocate the Company’s resources on a regional basis. Net sales for segments are attributed to the region in which the product is manufactured or service is performed. The services provided, manufacturing processes used, class of customers serviced and order fulfillment processes used are similar and generally interchangeable across the segments. A segment’s performance is evaluated based upon its operating income (loss). A segment’s operating income (loss) includes its net sales less cost of sales and selling and administrative expenses, but excludes corporate and other costs, interest expense, other income (loss), and income taxes. Corporate and other costs primarily represent corporate selling and administrative expenses, and restructuring and impairment costs, if any. These costs are not allocated to the segments, as management excludes such costs when assessing the performance of the segments. Inter-segment transactions are generally recorded at amounts that approximate arm’s length transactions. The accounting policies for the regions are the same as for the Company taken as a whole.

Information about the Company’s three reportable segments in fiscal 2011, 2010 and 2009 were as follows (in thousands):

The following enterprise-wide information is provided in accordance with the required segment disclosures. Net sales to unaffiliated customers were based on the Company’s location providing product or services (in thousands):

Long-lived assets as of October 1, 2011 and October 2, 2010 exclude other long-term assets and deferred income tax assets which totaled $30.5 million and $28.7 million, respectively.

Restructuring and asset impairment charges are not allocated to reportable segments, as management excludes such charges when assessing the performance of the reportable segments, but rather includes such charges within the “Corporate and other costs” section of the above table of operating income (loss). In fiscal 2011 and fiscal 2010 the Company did not incur any restructuring or asset impairment charges. In fiscal 2009, the Company incurred restructuring and asset impairment charges, as described in Note 10. The following table presents restructuring and asset impairment charges by segment for the years indicated (in thousands):

The percentages of net sales to customers representing 10 percent or more of total net sales for the indicated periods were as follows:

For our significant customers, we generally manufacture products in more than one location. For example, net sales to Juniper, our largest customer, occur in the AMER and APAC reportable segments.

The percentages of accounts receivable from customers representing 10 percent or more of total accounts receivable for the indicated periods were as follows:

No other customers represented 10 percent or more of the Company’s total net sales or total trade receivable balances as of October 1, 2011 and October 2, 2010.

The Company offers certain indemnifications under its customer manufacturing agreements. In the normal course of business, the Company may from time to time be obligated to indemnify its customers or its customers’ customers against damages or liabilities arising out of the Company’s negligence, misconduct, breach of contract, or infringement of third party intellectual property rights. Certain agreements have extended broader indemnification, and while most agreements have contractual limits, some do not. However, the Company generally does not provide for such indemnities and seeks indemnification from its customers for damages or liabilities arising out of the Company’s adherence to customers’ specifications or designs or use of materials furnished, or directed to be used, by its customers. The Company does not believe its obligations under such indemnities are material.

In the normal course of business, the Company also provides its customers a limited warranty covering workmanship, and in some cases materials, on products manufactured by the Company. Such warranty generally provides that products will be free from defects in the Company’s workmanship and meet mutually agreed-upon specifications for periods generally ranging from 12 months to 24 months. If a product fails to comply with the Company’s limited warranty, the Company’s obligation is generally limited to correcting, at its expense, any defect by repairing or replacing such defective product. The Company’s warranty generally excludes defects resulting from faulty customer-supplied components, design defects or damage caused by any party or cause other than the Company.

The Company provides for an estimate of costs that may be incurred under its limited warranty at the time product revenue is recognized and establishes additional reserves for specifically identified product issues. These costs primarily include labor and materials, as necessary, associated with repair or replacement and are included in our Consolidated Balance Sheets in other current accrued liabilities. The primary factors that affect the Company’s warranty liability include the value and the number of shipped units and historical and anticipated rates of warranty claims. As these factors are impacted by actual experience and future expectations, the Company assesses the adequacy of its recorded warranty liabilities and adjusts the amounts as necessary.

Below is a table summarizing the activity related to the Company’s limited warranty liability for the fiscal years 2011 and 2010 (in thousands):

Summarized quarterly financial data for fiscal 2011 and 2010 consisted of (in thousands, except per share amounts):


2011	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total
Net sales	$	565,774	$	568,145	$	559,183	$	538,130		$2,231,232
Gross profit		54,910		55,470		54,074		50,288		214,742
Net income		25,033		23,860		22,040		18,323		89,256

Earnings per share:
Basic	$	0.62	$	0.60	$	0.60	$	0.53		$ 2.34
Diluted	$	0.61	$	0.59	$	0.58	$	0.52		$ 2.30

2010	First Quarter		Second Quarter		Third Quarter		Fourth Quarter		Total
Net sales	$	430,399	$	490,978	$	536,384	$	555,632		$2,013,393
Gross profit		44,541		50,471		55,548		56,362		206,922
Net income		17,844		20,714		24,368		26,607		89,533

Earnings per share:
Basic	$	0.45	$	0.52	$	0.60	$	0.66		$ 2.24
Diluted	$	0.44	$	0.51	$	0.59	$	0.65		$ 2.19

The annual total amounts may not equal the sum of the quarterly amounts due to rounding. Earnings per share is computed independently for each quarter.

For the fiscal years ended October 1, 2011, October 2, 2010 and October 3, 2009 (in thousands):

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Dean A. Foate, Ginger M. Jones and Angelo M. Ninivaggi, and each of them, his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all amendments to this report, and to file the same with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission, and any other regulatory authority, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents or any of them, or their substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirement of the Securities Exchange Act of 1934, this report has been signed by the following persons on behalf of the registrant and in the capacities and on the date indicated.*


Title of Each Class		Name of Each Exchange on Which Registered
Common Stock, $.01 par value		The NASDAQ Global Select Market
Preferred Share Purchase Rights		The NASDAQ Global Select Market


Document		Part of Form 10-K Into Which Portions of Document are Incorporated
Proxy Statement for 2012 Annual
Meeting of Shareholders		Part III


Fiscal Year Ended October 1, 2011			Fiscal Year Ended October 2, 2010
	High	Low		High	Low
First Quarter	$33.75	$26.70	First Quarter	$29.67	$23.96
Second Quarter	$35.25	$26.50	Second Quarter	$38.00	$27.42
Third Quarter	$38.71	$30.53	Third Quarter	$39.66	$25.58
Fourth Quarter	$35.03	$21.34	Fourth Quarter	$31.69	$21.08


Period	Total number of shares purchased		Average price paid per share		Total number of shares purchased as part of publicly announced plans or programs		Maximum approximate dollar value of shares that may yet be purchased under the plans or programs*


July 3 to July 30, 2011		133,870		$ 34.32		133,870	$ 25,000,000

July 31 to August 27, 2011		890,970		28.04		890,970	$ -

August 28 to October 1, 2011		-		-		-	$ -


Total		1,024,840		$ 28.86		1,024,840


X		ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934


_____		TRANSITION REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934


	Fiscal years ended
Industry	October 1, 2011		October 2, 2010		October 3, 2009
Wireline/Networking		39%		43%		44%
Wireless Infrastructure		7%		12%		11%
Medical		21%		20%		22%
Industrial/Commercial		24%		18%		13%
Defense/Security/Aerospace		9%		7%		10%

		100%		100%		100%


Name	Age	Position
Dean A. Foate	53	President, Chief Executive Officer and Director
Ginger M. Jones	47	Senior Vice President and Chief Financial Officer
Michael D. Buseman	50	Executive Vice President - Global Manufacturing Operations
Steven J. Frisch	45	Regional President – Plexus EMEA and Senior Vice President – Global Engineering Solutions
Todd P. Kelsey	46	Executive Vice President - Global Customer Services
Yong Jin Lim	51	Regional President - Plexus APAC
Joseph E. Mauthe	49	Senior Vice President - Global Human Resources
Angelo M. Ninivaggi	44	Senior Vice President, General Counsel, Corporate Compliance Officer and Secretary
Michael T. Verstegen	53	Senior Vice President - Global Market Development


	2006		2007		2008		2009		2010		2011

Plexus		100		143		113		133		157		118

Nasdaq-US		100		118		97		92		108		112

Nasdaq-Electronics		100		130		94		92		98		88


	Fiscal Years Ended

Operating Statement Data	October 1, 2011				October 2, 2010				October 3, 2009				September 27, 2008				September 29, 2007


Net sales		$	2,231,232			$	2,013,393			$	1,616,622			$	1,841,622			$	1,546,264

Gross profit			214,742				206,922				154,776				205,761				163,539

Gross margin percentage			9.6	%			10.3	%			9.6	%			11.2	%			10.6	%

Operating income			101,179				99,652				53,067	⁽¹⁾			102,827	⁽²⁾			79,438	⁽³⁾

Operating margin percentage			4.5	%			4.9	%			3.3	%			5.6	%			5.1	%

Net income			89,256				89,533				46,327	⁽¹⁾			84,144	⁽²⁾			65,718	⁽³⁾

Earnings per share (diluted)		$	2.30			$	2.19			$	1.17	⁽¹⁾		$	1.92	⁽²⁾		$	1.41	⁽³⁾

Cash Flow Statement Data

Cash flows provided by operations		$	161,683			$	1,962			$	170,296			$	64,181			$	38,513

Capital equipment additions			74,051				74,674				57,427				54,329				47,837

Balance Sheet Data

Working capital		$	553,893			$	523,472			$	459,113			$	439,077			$	427,116

Total assets			1,304,525				1,290,379				1,022,672				992,230				916,516

Long-term debt and capital lease obligations			270,292				112,466				133,163				154,532				25,082

Shareholders’ equity			558,882				651,855				527,446				473,945				573,265

Return on average assets			6.9	%			7.7	%			4.6	%			8.8	%			7.7	%

Return on average equity			16.0	%			15.2	%			9.3	%			16.1	%			12.5	%

Inventory turnover ratio			4.3	x			4.1	x			4.4	x			5.3	x			5.5	x


	Fiscal years ended		Variance	Fiscal years ended		Variance

	October 1, 2011	October 2, 2010	Increase/ (Decrease)	October 2, 2010	October 3, 2009	Increase/ (Decrease)


Gross Profit	$214.7	$206.9	$7.8 3.8%	$206.9	$154.8	$52.1 33.7%

Gross Margin	9.6%	10.3%		10.3%	9.6%


	Fiscal years ended
	October 1,			October 2,			October 3,
		2011			2010			2009
Goodwill impairment		$	-		$	-		$	5.7
Severance costs			-			-			2.0
Adjustments to lease exit costs/other			-			-			0.9

Total restructuring and asset impairment charges		$	-		$	-		$	8.6


	Payments Due by Fiscal Year
Contractual Obligations	Total			2012			2013-2014			2015-2016			2017 and thereafter

Long-Term Debt Obligations (1,2)		$	338.5		$	28.6		$	102.3		$	17.7		$	189.9
Capital Lease Obligations			19.4			3.8			7.9			7.1			0.6
Operating Lease Obligations			41.2			11.6			17.6			9.1			2.9
Purchase Obligations (3)			336.9			335.1			1.4			0.4			-
Other Long-Term Liabilities on the Balance Sheet (4)			8.4			1.0			1.5			1.3			4.6
Other Long-Term Liabilities not on the Balance Sheet (5)			3.0			1.0			2.0			-			-

Total Contractual Cash Obligations		$	747.4		$	381.1		$	132.7		$	35.6		$	198.0


Plan category	Number of securities to be issued upon exercise of outstanding options, warrants and rights (1)		Weighted-average exercise price of outstanding options, warrants and rights		Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in 1^st column)

Equity compensation plans approved by securityholders		3,642,883		$ 27.69		3,146,516

Equity compensation plans not approved by securityholders		-0-		$ n/a		-0-

Total		3,642,883		$ 27.69		3,146,516


(a)		Documents filed

		Financial Statements and Financial Statement Schedule. See the following list of Financial Statements and Financial Statement Schedule on page 39.

(b)		Exhibits. See Exhibit Index included as the last page of this report, which index is incorporated herein by reference.


Contents	Pages

Report of Independent Registered Public Accounting Firm		40

Consolidated Financial Statements:

Consolidated Statements of Operations for the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009		41

Consolidated Balance Sheets as of October 1, 2011 and October 2, 2010		42

Consolidated Statements of Shareholders’ Equity and Comprehensive Income for the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009		43

Consolidated Statements of Cash Flows for the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009		44

Notes to Consolidated Financial Statements		45

Financial Statement Schedule:

Schedule II - Valuation and Qualifying Accounts for the fiscal years ended October 1, 2011, October 2, 2010, and October 3, 2009		70


	2011				2010
ASSETS
Current assets:
Cash and cash equivalents		$	242,107			$	188,244
Accounts receivable, net of allowances of $3,256 and $1,400, respectively			284,019				311,205
Inventories			455,836				492,430
Deferred income taxes			15,750				18,959
Prepaid expenses and other			10,858				15,153


Total current assets			1,008,570				1,025,991

Property, plant and equipment, net			265,505				235,714
Deferred income taxes			12,470				11,787
Other			17,980				16,887


Total assets		$	1,304,525			$	1,290,379


LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Current portion of long-term debt and capital lease obligations		$	17,350			$	17,409
Accounts payable			307,152				360,686
Customer deposits			30,739				27,301
Accrued liabilities:
Salaries and wages			42,101				46,639
Other			57,335				50,484


Total current liabilities			454,677				502,519

Long-term debt and capital lease obligations, net of current portion			270,292				112,466
Other liabilities			20,674				23,539


Total non-current liabilities			290,966				136,005

Commitments and contingencies

Shareholders’ equity:
Preferred stock, $.01 par value, 5,000 shares authorized, none issued or outstanding			-				-
Common stock, $.01 par value, 200,000 shares authorized, 48,298 and 47,849 shares issued, respectively, and 34,544 and 40,403 shares outstanding, respectively			483				478
Additional paid-in capital			415,556				399,054
Common stock held in treasury, at cost, 13,754 and 7,446 shares, respectively			(400,110	)			(200,110	)
Retained earnings			534,824				445,568
Accumulated other comprehensive income			8,129				6,865

			558,882				651,855


Total liabilities and shareholders’ equity		$	1,304,525			$	1,290,379


													Accumulated
	Common Stock												Other
	Shares			Amount		Additional Paid-In Capital		Treasury Stock			Retained Earnings		Comprehensive Income (Loss)			Total
Balances, September 27, 2008		39,326		$	468	$	353,105	$	(200,110	)	$	309,708	$	10,774		$	473,945

Comprehensive income:
Net income		-			-		-		-			46,327		-			46,327
Foreign currency translation adjustments		-			-		-		-			-		(2,917	)		(2,917	)
Change in fair market value of derivative instruments, net of tax		-			-		-		-			-		(3,177	)		(3,177	)

Total comprehensive income																	40,233
Stock-based compensation expense		-			-		9,421		-			-		-			9,421
Exercise of stock options, including tax benefits		222			2		3,845		-			-		-			3,847


Balances, October 3, 2009		39,548			470		366,371		(200,110	)		356,035		4,680			527,446

Comprehensive income:
Net income		-			-		-		-			89,533		-			89,533
Foreign currency translation adjustments		-			-		-		-			-		212			212
Change in fair market value of derivative instruments, net of tax		-			-		-		-			-		1,973			1,973

Total comprehensive income																	91,718
Stock-based compensation expense		-			-		9,536		-			-		-			9,536
Exercise of stock options, including tax benefits		855			8		23,147		-			-		-			23,155


Balances, October 2, 2010		40,403			478		399,054		(200,110	)		445,568		6,865			651,855

Comprehensive income:
Net income		-			-		-		-			89,256		-			89,256
Foreign currency translation adjustments		-			-		-		-			-		1,671			1,671
Change in fair market value of derivative instruments, net of tax		-			-		-		-			-		(407	)		(407	)

Total comprehensive income																	90,520
Treasury shares purchased		(6,308	)		-		-		(200,000	)		-		-			(200,000	)
Stock-based compensation expense		-			-		11,041		-			-		-			11,041
Exercise of stock options, including tax benefits		449			5		5,461		-			-		-			5,466


Balances, October 1, 2011		34,544		$	483	$	415,556	$	(400,110	)	$	534,824	$	8,129		$	558,882


	2011		2010

Cash	$	93,587	$	121,976
Money market funds and other		148,520		66,268

	$	242,107	$	188,244


	2011			2010

Foreign currency translation adjustment	$	11,460		$	9,789
Cumulative change in fair market value of derivative instruments, net of tax		(3,331	)		(2,924	)

Accumulated other comprehensive income	$	8,129		$	6,865


	2011		2010

Raw materials	$	337,136	$	365,883
Work-in-process		46,330		56,036
Finished goods		72,370		70,511

	$	455,836	$	492,430


	2011		2010

Land, buildings and improvements	$	161,820	$	138,230
Machinery and equipment		278,807		255,138
Computer hardware and software		83,373		79,108
Construction in progress		40,553		22,145

		564,553		494,621

Less: accumulated depreciation		299,048		258,907

	$	265,505	$	235,714


	2011		2010

Debt:
Borrowings under term loan, expiring on April 4, 2013, interest rate of base rate or LIBOR rate plus 1.50%. See also Note 5, Derivatives and Fair Value Measurements.	$	97,500	$	112,500

Borrowings under senior notes, expiring on June 15, 2018, interest rate of 5.20%. See also Note 5, Derivatives and Fair Value Measurements.		175,000		-

Capital lease:
Capital lease obligations for equipment and facilities located in San Diego and Xiamen, China, expiring on various dates through 2017; weighted average interest rates of 10.3% and 10.2% for fiscal 2011 and 2010, respectively.		15,142		17,375

Less: current portion		(17,350)		(17,409)

Long-term debt and capital lease obligations, net of current portion	$	270,292	$	112,466


2012	$	15,000
2013		82,500
2014		-
2015		-
2016		-
Thereafter		175,000


Total	$	272,500


2012	$	3,800
2013		3,894
2014		3,984
2015		4,078
2016		3,055
Thereafter		622


		19,433
Less: interest portion of capital leases		4,291

Total	$	15,142


The Effect of Derivative Instruments on the Statements of Operations for the Twelve Months Ended
In thousands of dollars
Derivatives in Cash Flow Hedging Relationships	Amount of Gain or (Loss) Recognized in Other Comprehensive Income (“OCI”) on Derivative (Effective Portion)		Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)		Location of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	Amount of Gain or (Loss) Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)
	October 1, 2011	October 2, 2010		October 1, 2011	October 2, 2010		October 1, 2011	October 2, 2010
Interest rate swaps	$ (510)	$(4,622)	Interest income (expense)	$ (4,310)	$ (4,908)	Other income (expense)	$ -	$ -
Forward contracts	$(1,468)	$ 4,110	Selling and administrative expenses	$ 3,423	$ 2,028	Other income (expense)	$ -	$ -
Treasury Rate Locks	$ 2,281	$ -	Interest income (expense)	$ 125	$ -	Interest income (expense)	$ -	$ -


	Fair Value Measurements Using Input Levels Asset/ (Liability) (in thousands):
	Level 1		Level 2			Level 3		Total
Derivatives
Interest rate swaps	$	-	$	(5,239	)	$	-	$	(5,239	)
Forward currency forward contracts	$	-	$	(2,544	)	$	-	$	(2,544	)


	2011		2010		2009

U.S.	$	(9,449)	$	(7,742)	$	(5,380)

Foreign		101,552		98,179		50,799

	$	92,103	$	90,437	$	45,419


	2011			2010
Deferred income tax assets:
Loss/credit carryforwards		$ 10,263			$ 10,904
Goodwill		2,787			3,550
Inventories		6,961			7,936
Accrued benefits		16,001			14,473
Allowance for bad debts		1,149			383
Interest rate swaps		2,031			3,504
Other		4,406			3,917
Total gross deferred income tax assets		43,598			44,667
Less valuation allowance		(5,116	)		(2,547	)
Deferred income tax assets		38,482			42,120
Deferred income tax liabilities:
Property, plant and equipment		9,552			10,346
Other		710			1,028

		10,262			11,374
Net deferred income tax asset		$ 28,220			$ 30,746


Balance at beginning of fiscal 2010	$	4,849
Gross increases for tax positions of prior years		131
Gross increases for tax positions of the current year		964
Gross decreases for tax positions of prior years		-
Settlements		-

Balance at beginning of fiscal 2011	$	5,944
Gross increases for tax positions of prior years		191
Gross increases for tax positions of the current year Gross decreases for tax positions of prior years		1,225 -
Settlements		-

Balance at October 1, 2011	$	7,360


Jurisdiction		Fiscal Years
China		2008 – 2011
Germany		2009 – 2011
Mexico		2006 – 2011
Romania		2009 – 2011
United Kingdom		2007 – 2011
United States
Federal		2007 – 2011
State		2001 – 2011


2012	$	11,574
2013		9,589
2014		8,015
2015		5,724
2016		3,456
Thereafter		2,868

	$	41,226


	Fiscal Years Ended
	October 1, 2011	October 2, 2010	October 3, 2009

Expected life (years)	4.40 – 5.00	4.40 – 5.00	4.40 – 4.90
Risk-free interest rate	1.03 – 2.17%	1.61 – 2.71%	1.76 – 2.84%
Expected volatility	49 – 50%	50%	48 – 51%
Dividend yield	-	-	-