10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10–K

(mark one)

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

For the fiscal year ended September 28, 2013

OR

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

Commission file number 001-14423

PLEXUS CORP.

(Exact Name of Registrant as Specified in its Charter)

Wisconsin		39-1344447
(State or other jurisdiction of         incorporation or organization)	One Plexus Way Neenah, Wisconsin 54956 (920) 722-3451	(I.R.S. Employer Identification No.)

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

Securities registered pursuant to Section 12(b) of the Act:

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

Securities registered pursuant to Section 12(g) of the Act:                    None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes Ÿ  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 Ÿ

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 Ÿ  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 Ÿ  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. [Ÿ]

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

Large accelerated filer Ÿ	Accelerated filer
Non-accelerated filer	Smaller reporting company
(Do not check if a smaller reporting company)

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

As of March 30, 2013, 34,360,029 shares of common stock were outstanding, and the aggregate market value of the shares of common stock (based upon the $24.31 closing sale price on that date, as reported on the NASDAQ Global Select Market) held by non-affiliates (excludes 415,757 shares reported as beneficially owned by directors and executive officers – does not constitute an admission as to affiliate status) was approximately $825.2 million.

As of November 18, 2013, there were 33,796,557 shares of common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Document	Part of Form 10-K Into Which Portions of Document are Incorporated
Proxy Statement for 2014 Annual
Meeting of Shareholders	Part III

PLEXUS CORP.

TABLE OF CONTENTS

Form 10-K for the Fiscal Year Ended

September 28, 2013

PART I	4
ITEM 1. BUSINESS	4
ITEM 1A. RISK FACTORS	10
ITEM 1B. UNRESOLVED SEC STAFF COMMENTS	19
ITEM 2. PROPERTIES	20
ITEM 3. LEGAL PROCEEDINGS	21
ITEM 4. MINE SAFETY DISCLOSURES	21
PART II	22
ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES	22
ITEM 6. SELECTED FINANCIAL DATA	24
ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS	25
ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK	36
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA	37
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE	37
ITEM 9A. CONTROLS AND PROCEDURES	37
ITEM 9B. OTHER INFORMATION	38
PART III	39
ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE	39
ITEM 11. EXECUTIVE COMPENSATION	39
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS	39
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE	39
ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES	39
PART IV	40
ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES	40
SIGNATURES	70
EXHIBIT INDEX	71

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

The statements contained in this Form 10-K that are guidance or which 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. These risks and uncertainties include, but are not limited to: the risk of customer delays, changes, cancellations or forecast inaccuracies in both ongoing and new programs; the poor visibility of future orders, particularly in view of changing economic conditions; the adequacy of restructuring and similar charges as compared to actual expenses; the economic performance of the industries, sectors and customers we serve; the effects of the volume of revenue from certain sectors or programs on our margins in particular periods; our ability to secure new customers, maintain our current customer base and deliver product on a timely basis; the particular risks relative to new or recent customers or programs, which risks include customer and other delays, start-up costs, potential inability to execute, the establishment of appropriate terms of agreements, and the lack of a track record of order volume and timing; the risks of concentration of work for certain customers; our ability to manage successfully a complex business model characterized by high customer and product mix, low volumes and demanding quality, regulatory, and other requirements; the risk that new program wins and/or customer demand may not result in the expected revenue or profitability; the fact that customer orders may not lead to long-term relationships; the effects of shortages and delays in obtaining components as a result of economic cycles or natural disasters; the risks associated with excess and obsolete inventory, including the risk that inventory purchased on behalf of our customers may not be consumed or otherwise paid for by the customer, resulting in an inventory write-off; the weakness of areas of the global economy; the effect of changes in the pricing and margins of products; the effect of start-up costs of new programs and facilities, such as our new facilities in China, Romania and the United States, our announced plans to open a new facility in Mexico and our other recent, planned and potential future expansions or replacements; increasing regulatory and compliance requirements; possible unexpected costs and operating disruption in transitioning programs; raw materials and component cost fluctuations; the potential effect of fluctuations in the value of the currencies in which we transact business; the potential effects of regional results on our taxes and ability to use deferred tax assets; the potential effect of world or local events or other events outside our control (such as drug cartel-related violence in Mexico, changes in oil prices, terrorism and weather events); the impact of increased competition; and other risks detailed below in “Risk Factors”, otherwise herein, and in our Securities and Exchange Commission filings.

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.

*    *    *

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PART I

ITEM 1. BUSINESS

Overview

Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) participate in the Electronic Manufacturing Services (“EMS”) industry. We deliver optimized solutions to our customers through our unique Product Realization Value Stream.  Our customer-focused solutions model seamlessly integrates innovative product conceptualization, design, commercialization, manufacturing, fulfillment and sustaining solutions. Plexus delivers comprehensive end-to-end solutions for customers in the Americas (“AMER”), Europe, Middle East, and Africa (“EMEA”) and Asia-Pacific (“APAC”) regions.

We provide award-winning customer service to more than 140 branded product companies in the Networking/Communications, Healthcare/Life Sciences, Industrial/Commercial and Defense/Security/Aerospace market sectors. Our customers have stringent quality, reliability and regulatory requirements, mandating exceptional production and supply chain agility. Their products require complex configuration management, direct order fulfillment (to end customers) and global logistics management and sustaining solutions. To service the complexities our customers' products demand, we utilize our Product Realization Value Stream, addressing our customers' products from concept to end of life -- conceptualization, design, commercialization, manufacturing, fulfillment and sustaining solutions.

Plexus is passionate about striving 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. To support and deliver on our strategy, we align our operations, processes, workforce and financial metrics through a multidimensional business strategy that includes:

• A high performance, accountable organization with a highly skilled and talented workforce that strives to provide customer service excellence,

• A customer driven, disciplined deployment of strategic growth through sector based go-to-market strategies,

• Execution through continuous evaluation and optimization of our business processes, supporting our return on invested capital (“ROIC”) goal.

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

Our go-to-market strategy is tailored by business development and customer management teams dedicated to each of the four sectors we serve. These teams execute our sector strategies through expertise in markets and technology as well as unique quality and regulatory capabilities. Our sector teams help define Plexus' strategy for growth with a particular focus on expanding the value-added solutions we offer customers.

Our financial model aligns with our business strategy. Our primary focus is to earn a return on invested capital (“ROIC”) 5% over our weighted average cost of capital (“WACC”). We review our internal calculation of WACC annually; at the end of fiscal 2013 we reduced our estimated WACC from 12.0% to 11.0% for fiscal 2014. We believe economic profit is a fundamental driver of shareholder value. Plexus measures economic profit by taking the difference between ROIC and WACC and multiplying it by invested capital. By exercising discipline to generate an ROIC in excess of our WACC, with focus on economic profit, our goal is to ensure that Plexus creates value for our shareholders.

Relative to our competition, overriding factors such as lower manufacturing volumes, flexibility and fulfillment requirements, as well as complex regulatory environments, typically result in higher investments in inventory and selling and administrative costs. The cost variance from our competitors is especially evident relative to those that provide EMS services for high-volume, less complex products, with less stringent requirements (e.g., consumer electronics).

Plexus serves a diverse customer landscape that includes industry-leading, branded product companies, along with many other technology pioneering start-ups or emerging companies that may or may not maintain manufacturing capabilities. As a result of serving market sectors that rely on advanced electronics technology, our business is influenced by critical technological trends such as the level and rate of development of wired and wireless telecommunications infrastructure, communications data and data bandwidth growth, and Internet usage. In addition to prime technology advancements, key government and policy trends impact our business, including the U.S. Food and Drug Administration's (“FDA”) approval of new medical devices,

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defense procurement practices, and other government and regulatory processes. Plexus may benefit from increasing outsourcing trends.

We provide most of our optimized solutions on a turnkey basis, and we procure some or all materials required for product assembly. We provide select services on a consignment basis, meaning the customer supplies the necessary materials and Plexus provides the labor and other services required for product assembly. In addition to manufacturing, turnkey services require material procurement and warehousing 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 9,200 full-time employees, including approximately 1,740 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 27 active facilities, totaling approximately 4.1 million square feet. Plexus' facilities are strategically located to support the global supply chain, as well as manufacturing and engineering needs of customers in our targeted market sectors.

Plexus maintains a website at www.plexus.com. As soon as is reasonably practical, and after we electronically file or furnish all filings to the Securities and Exchange Commission (“SEC”), we provide online copies, free of charge. These reports include: Proxy Statements, Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports. 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.

Solutions

As an integrated, fully accountable partner, we deliver optimized product realization solutions that carry our customers' products from concept to end of life. Tailoring our Product Realization Value Stream to each product and program, Plexus provides unique solutions designed to meet the needs of each of our customers. As our partnerships grow and mature, we aim to engage our customers in full utilization of our Product Realization Value Stream.

Conceptualize. During the product development and conceptualization phases, new product ideas are created and evaluated with both the customer's and Plexus' engineering teams. We closely collaborate with our customers to capture their new product vision and clarify requirements. Our industrial design team attempts to analyze a product through the end user's eyes focusing on ergonomics, use case research, user interface, aesthetics and evaluation mockups. Upon completion of concept evaluations, the Plexus team prototypes what it believes to be the most promising designs, working concurrently with engineering, manufacturing and supply chain teams. Future phases ensure design intent is maintained, while realizing the final product solution.

Design. Plexus invests in the latest technology, design and automation tools to provide comprehensive design and value-engineering solutions. We engage with our customers in a variety of ways - from supporting a short-term expansion of their engineering design capabilities to collaborating on complex turn-key product design. Our disciplined approach and structure enables significant project schedule flexibility via work-sharing across our organization. Product design includes, but is not limited to, the following solutions:

• Program management

• Feasibility studies

• Product conceptualization

• Specification development for product features and functionality

• Circuit design (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 (thermal analysis, fluidics, robotics, plastic components, sheet metal enclosures and castings)

• Test specifications development and product verification testing

Plexus also provides comprehensive value-engineering solutions, extending the product life cycle. Our value-add solutions span a wide range - engineering change-order management, cost reduction redesign, component obsolescence management, product feature expansion, test enhancement and component re-sourcing.

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Commercialize. Of all the phases in our Product Realization Value Stream, the commercialize phase carries the most influence with respect to converting ideas into viable products. Commercialization starts early in the design phase and extends through manufacturing transition, often in tandem with Design for Excellence (“DFX”). Our DFX solutions encompass a wide collection of specific design solutions including design for test, design for manufacturability/assembly and design for fabrication. The goal of DFX is to facilitate an efficient transition from engineering to manufacturing. The commercialize phase also includes prototyping, new product introduction, design for supply chain, test development and transition management. We believe our commercialization solutions provide significant value by accelerating time-to-market, reducing change activity and providing customers with a robust and enduring product.

Manufacture. Plexus applies an optimized manufacturing approach, not a one-size-fits-all model. Our scalable manufacturing solutions integrate flexibility for our customers through tailored supply chain solutions. Our focus-factory model provides a dedicated team designed to drive success while saving time and money. Focus-factories place the customer at the center of operations, executing within a culture of continuous improvement. Plexus exclusively focuses on mid-to-low volume, higher-complexity programs that range from lower-level assemblies to finished electro-mechanical products. Our manufactured products typically fall into one of the following categories in our assembly spectrum:

• Printed circuit board assembly - a printed circuit board (“PCB”) populated with electronic components

• Basic assembly - a sub-assembly that includes PCBs and other components

• System integration - a finished product or sub-system assembly that includes more complex components such as PCBs, basic assemblies, custom engineered components, displays, optics, metering and measurement or thermal management

• Mechatronic integration - more complex system integration that combines electronic controls with mechanical systems and processes such as motion control, robotics, drive systems, fluidics, hydraulics or pneumatics

System and mechatronic integration products may run larger in size than other assemblies; the products range from kiosks to finished healthcare devices and life sciences equipment to other complex electro-mechanical assemblies. These products often combine other integrated solutions we provide and may require further unique facility configurations or supply chain solutions.

Fulfill. Plexus offers fulfillment and logistics solutions to all our customers in the forms of Direct Order Fulfillment (“DOF”), Build to Order (“BTO”) and Configure to Order (“CTO”). Plexus receives DOF orders from our customers that provide the final specifications required by their end customer. Through BTO and CTO, Plexus delivers the product directly to the end customer. The DOF process relies on Enterprise Resource Planning (“ERP”) systems integrating the overall supply chain, from parts procurement through manufacturing and logistics.

Sustain. Plexus provides our customers with a range of solutions support after product launch including sustaining engineering, supply chain, and manufacturing solutions. In support of certain customers, we may provide these tailored sustaining solutions for products that we may not have originally manufactured:

Sustaining Engineering Solutions

• Revitalization of existing products to extend the product lifecycle, including redesign for cost reduction, improved reliability and obsolescence mitigation

• Failure and root cause analysis

• Regulatory compliance surveillance and remediation

Sustaining Supply Chain Solutions

• Reverse logistics management

• Logistics optimization

• Component lifecycle analysis including proactive obsolescence management

• Alternate component sourcing and supplier qualification

Sustaining Manufacturing Solutions

• Receiving and diagnostic analysis on returned goods

• Warranty and non-warranty repair

• Refurbishment and upgrade to outdated products

• Advanced field replenishment strategies

Regulatory requirements. All Plexus manufacturing and engineering facilities are certified to a baseline Quality Management System standard per ISO9001:22008. We have developed and maintained processes and tools to meet industry-specific

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requirements at facilities, where necessary. We have capabilities to assemble finished medical devices meeting FDA Quality Systems Regulation requirements, and similar regulatory requirements in other countries.

Our manufacturing and engineering facilities are certified to the most current revision of the ISO 9001 standard. We have additional certifications and/or registrations held by certain facilities in the following regions:

	AMER	APAC	EMEA
Medical Standard ISO 13485:2003	X	X	X
21 CFR Part 820 (FDA) (Medical)	X	X	X
CFDA (Medical)		X
JMGP accreditation	X	X	X
Environmental Standard ISO - 14001	X	X	X
Environmental Standard OSHAS 18001		X	X
ANSI/ESD (Electrostatic Discharge Control Program) S20.20	X	X
Telecommunications Standard TL 9000	X	X
ITAR (International Traffic and Arms Regulation) self-declaration	X
Aerospace Standard AS9100	X	X	X
NADCAP certification	X	X	X
FAR 145 certification (FAA repair station)	X
ATEX/IECEx certification		X	X

Customers and Market Sectors Served

We provide services to a wide variety of customers, ranging from large multinational companies to smaller emerging technology companies. During fiscal 2013, we served approximately 140 customers. We offer advanced design and production capabilities, allowing our customers to concentrate on their core competencies. Plexus helps accelerate our customers' time to market, reduce their investment in engineering and manufacturing capacity, and optimize total product cost.

Juniper Networks, Inc. (“Juniper”), which accounted for 13 percent of our net sales in fiscal 2013, 16 percent in fiscal 2012 and 17 percent in fiscal 2011, disengaged from Plexus in 2013, and we expect no further shipments to Juniper in fiscal 2014. No other customer accounted for 10 percent or more of our net sales in fiscal 2013, 2012 or 2011. The loss of any of our other major customers could have a significant negative impact on our financial results.

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 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.

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 independent of sales to others.

The distribution of our net sales by market sectors for fiscal 2013, 2012 and 2011 is shown in the following table:

Industry	2013	2012	2011
Networking/Communications	37%	39%	46%
Industrial/Commercial	25%	29%	24%
Healthcare/Life Sciences	25%	22%	21%
Defense/Security/Aerospace	13%	10%	9%
	100%	100%	100%

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Although our current business development focus is based on our targeted market sectors, we evaluate our financial performance and allocate our resources geographically (see Note 12 in Notes to Consolidated Financial Statements regarding our reportable segments). Plexus offers a uniform array of services for customers in each market sector and we do not dedicate operational equipment, personnel, facilities or other resources to particular market sectors, nor internally track our costs and resources per market sector.

Materials and Suppliers

We typically purchase raw materials, including printed circuit boards and electronic components, from manufacturers and distributors. 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.

We may also purchase non-electronic 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 components range from standard to highly customized and vary widely in terms of market availability and price.

Component shortages and subsequent allocations by suppliers are an inherent risk to the electronics industry, and have particularly been an issue for us and the industry from time to time. We discuss the causes of these shortages 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.

The Plexus global supply chain management organization attempts to create strong supplier alliances and ensure a steady flow of components and products at competitive prices. Our global expediting and escalation processes track and analyze supply chain health and anticipate constraints. Plexus can often influence the selection of new product components throughout the design phase of the Product Realization Value Stream. The advanced supply chain solutions we develop in partnership with our customers improve the continuity of supply and supply chain flexibility.

New Business Development

Our new business development team is organized around our targeted market sectors and comprised of dedicated resources. A market development vice president and customer management vice president oversee and provide leadership to business development directors, customer directors, customer managers, business development, supply chain and manufacturing subject matter experts, and market sector analysts. Our sales and marketing efforts focus on targeting new customers and expanding business with existing customers. We believe our ability to provide a full range of product realization services gives Plexus a business advantage.

Competition

Plexus operates in a highly competitive market, with a goal to be best-in-class at meeting the unique needs of our customers. We provide flexible solutions, timely order fulfillment, and strong engineering, testing and production capabilities. A number of competitors may provide electronics manufacturing and engineering services similar to Plexus. Others may be more established in certain industry sectors, or have greater financial, manufacturing or marketing resources. Smaller competitors compete mainly in specific sectors and within limited geographical areas. Plexus occasionally competes with in-house capabilities of current and potential customers. Plexus maintains strong awareness and knowledge of our competitors' capabilities, in order to remain highly competitive within the broad scope of the EMS industry.

Intellectual Property

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.

Information Technology

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Our integrated ERP, warehouse management and shop floor control systems serve all of our manufacturing sites, providing a core set of consistent, global business applications. This consistency augments our other management information systems, allowing us to standardize our ability to translate data from multiple production facilities into operational and financial information. The related software licenses are of a general commercial character on terms customary for these types of agreements.

Environmental Compliance

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.

Social Responsibility

We are committed to social responsibility within our business and global operations. Our commitment to social responsibility extends to human rights, labor practices, the environment, worker health and safety, fair operating practices and the Company’s social impact in the communities where we operate. We consider a variety of standards for socially responsible practices, including local and federal legal requirements in the jurisdictions where we operate, the International Organization for Standardization’s “Guidance on Social Responsibility” (ISO 26000) and standards established by the Electronics Industry Citizenship Coalition.

Employees

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 development opportunities 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 9,200 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 239 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 China, Germany, Malaysia, Mexico, Romania and the United States 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 generally positive and stable.

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ITEM 1A. RISK FACTORS

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 volume and timing of customer demand relative to our capacity

• the typical short life-cycle of our customers' products

• customers' operating results and business conditions

• changes in our, and our customers', sales mix, as well as the volatility of these changes

• variations in sales and margins among geographic regions

• varying gross margins among different programs, including as a result of pricing concessions to certain customers

• failures of our customers to pay amounts due to us

• challenges associated with the engagement of new customers or additional work from existing customers

• unanticipated customer disengagements

• the timing of our expenditures in anticipation of future orders

• our effectiveness in planning production and managing inventory, fixed assets and manufacturing processes

• changes in cost and availability of labor and components

• exchange rates and

• changes in U.S. and global economic and political conditions and world events.

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 September 28, 2013, and 60 percent of our net sales for the fiscal year ended September 29, 2012. For each of the fiscal years ended September 28, 2013 and September 29, 2012, there was one customer, Juniper, that represented 10 percent or more of our net sales. As previously announced, Juniper disengaged from us during fiscal 2013.

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, particularly given the volatile nature of certain programs. 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, business and/or regulatory conditions that affect the sector, or our failure to choose appropriate sectors can particularly impact Plexus. For instance, sales in the Healthcare/Life Sciences sector are substantially affected by trends in the healthcare 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, including as a result of the Patient Protection and Affordable Care Act (the "Affordable Care Act"). Further, potential reductions in U.S. defense spending, including those due to sequestration, potential government shutdown, failure to raise the debt ceiling or similar political issues, 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.

From time to time, our customers, including formerly significant customers, have been affected by merger and acquisition activity. While these transactions may present Plexus with opportunities to capture new business, they also create the risk that these customers will partially or completely disengage as a result of transitioning such business to other contract manufacturers or deciding to manufacture the products internally.

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

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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:

• economic, political or civil instability, including significant drug cartel-related violence in Mexico

• transportation delays or interruptions

• exchange rate fluctuations

• changes in labor markets, such as government mandated wage increases, and difficulties in appropriately staffing and managing personnel in multiple cultures

• compliance with laws, such as the U.S. Foreign Corrupt Practices Act and the U.K. Bribery Act, applicable to companies with global operations

• significant natural disasters and other events or factors impacting local infrastructure

• the effects of international political developments and

• regulatory requirements and potential changes to those requirements.

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 appropriately address 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, as well as government imposed restrictions on producing certain products in, or shipping them to, specific countries. For example, our facility in Juarez, Mexico operates under the Mexican Maquiladora ("IMMEX") program, and we expect that our new facility in Guadalajara, Mexico will qualify as well. This program provides for reduced tariffs and eased import regulations; we could be adversely affected by changes in the IMMEX 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 in both design and production. 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 engineering or other service 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.

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-complexity segment of the EMS market. Our customers’ products typically require significant production and supply-chain flexibility, in some cases 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, flexibility and resources. These resources include working capital, management and technical personnel, and the development and maintenance of systems and procedures to manage diverse manufacturing, regulatory and service requirements for multiple programs of varying sizes simultaneously, including in multiple locations. We also depend on bringing new customers and

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programs online and on transitioning production for new customers and programs, which creates added complexities related to managing the start-up risks of such projects.

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 result in claims against us and/or 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.

If we fail to effectively manage or execute 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.

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 its potential 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; in addition, as a result of production startup costs, new programs are inherently less efficient in their earlier phases than mature programs. 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.

Our manufacturing services involve inventory risk.

Most of our contract manufacturing services are provided on a turnkey basis, under which we purchase some, or all, of the required 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 materials or components. While we attempt to cancel, return or otherwise mitigate excess and obsolete inventory and require customers to reimburse us for these items, we may not actually be reimbursed timely or be able to collect on these obligations. 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 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, including the transfer of operations to larger facilities, can inherently include additional costs and start-up inefficiencies. During fiscal 2013, we opened a new manufacturing facility in China (Xiamen) and a replacement facility in Romania (Oradea). In the first quarter of fiscal 2014, we opened a new manufacturing facility in the U.S. (Neenah, Wisconsin), which is replacing two existing leased facilities and one owned facility. In addition, in fiscal 2013, we entered into a lease for a

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new facility in Guadalajara, Mexico. Construction of the new facility is expected to be complete in the second half of fiscal 2014. 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:

• the inability to successfully integrate additional facilities or incremental capacity and to realize anticipated synergies, economies of scale or other value

• challenges faced as a result of transitioning programs

• incurrence of restructuring or other charges that may not have their intended effects

• additional fixed or other costs, or selling, general and administrative ("SG&A") expenses, which may not be fully absorbed by new business

• a reduction of our return on invested capital, including as a result of excess inventory or excess capacity at new facilities

• difficulties in the timing of expansions, including delays in the implementation of construction and manufacturing plans

• diversion of management’s attention from other business areas during the planning and implementation of expansions

• strain placed on our operational, financial and other systems and resources and

• inability to locate sufficient customers, employees or management talent to support the expansion.

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 excess capacity or higher levels of employment entail short-term costs, reductions in capacity 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, particularly when the production requirements of certain products is site-specific, or to achieve increased efficiencies, we sometimes require additional capacity in one location while reducing capacity in another. 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. We may also encounter situations where our lack of a physical presence in certain locations may limit or foreclose opportunities.

Changes in tax laws, potential tax disputes, negative or unforeseen tax consequences and/or further developments affecting our deferred tax assets could affect our results.

The Company has been granted a tax holiday for its Malaysian subsidiary. This tax holiday expires in 2024 and is subject to certain conditions with which the Company expects to comply and would risk adverse tax consequences if we do not.

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. In addition, other recently adopted or potential changes to tax laws in the other jurisdictions in which we operate could also affect our results.

Plexus is eligible for up to $15 million in Wisconsin state tax credits in connection with our new manufacturing facility in Neenah, if we meet certain requirements related to, among other matters, job creation and retention, employee training and capital investment. If we do not comply with these requirements, we may not be able to realize all, or any, of these tax credits. As of September 28, 2013, approximately $4.7 million has been recognized as a miscellaneous receivable related to the credits.

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 an additional 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 industry standards, and the impact of certain future regulations remains uncertain; failure to comply with such regulations and standards could have an adverse affect on our business, customer relationships, reputation and profitability.

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We are subject to extensive government regulation and industry standards relating to the products we design and manufacture as well as how we conduct our business, including regulations and standards relating to labor and employment practices, workplace health and safety, the environment, sourcing and import/export practices, the market sectors we support and many other facets of our operations. The regulatory climate in the U.S. and other countries has become increasingly complex and fragmented, and regulatory activity has increased in recent periods. Failure or noncompliance with such regulations or standards could have an adverse effect on our reputation, customer relationships, profitability and results of operations.

As a publicly-held company, we are subject to increasingly stringent laws, regulation and other requirements, including those resulting from the Sarbanes-Oxley Act and the Dodd-Frank Wall Street Reform and Consumer Protection Act, affecting, among other areas, our accounting, internal controls, corporate governance practices, securities disclosures and reporting. For example, in fiscal 2013, the SEC adopted disclosure requirements related to the use of specified "conflict" minerals that are necessary to the functionality or production of products manufactured, or contracted to be manufactured, by publicly-held companies. Compliance with such requirements could increase costs and affect the manufacturing and sale of our products.

Governments worldwide are becoming increasingly aggressive in enforcing and adopting anti-corruption laws. The U.S. Foreign Corrupt Practices Act and the U.K. Bribery Act, among others, apply to us and our operations.

The Affordable Care Act significantly affects the provision of both health care services and benefits in the United States and is expected to impact our cost of providing our employees and retirees with health insurance and/or benefits, and may also impact various other aspects of our business.

Our Healthcare/Life Sciences sector is subject to statutes and regulations covering the design, development, testing, manufacturing and labeling of medical devices and the reporting of certain information regarding their safety, including Food and Drug Administration ("FDA") regulations and similar regulations in other countries. 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.

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, and also under the Federal Acquisition Regulation.

In addition, whenever we pursue business in new sectors and subsectors, or our customers pursue new technologies or markets, we need to navigate the potentially heavy regulatory and legislative burdens of such sectors, technologies or markets.

The regulatory climate can itself affect the demand for our services. For example, 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, including as a result of the Affordable Care Act, and how medical devices are taxed, could affect the willingness and ability of end customers to purchase the products of our customers in this sector as well as impact our margins.

Our customers are also required to comply with various government regulations, legal requirements and industry standards, 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.

A failure to comply with customer-driven policies and standards, and third party certification requirements, including those related to social responsibility, could adversely affect our business.

In addition to government regulations and industry standards, our customers may require us to comply with their own social responsibility, conflict minerals or other business policies or standards, which may be more restrictive than current laws and regulations as well as our pre-existing policies, before they commence, or continue, doing business with us. Such policies or standards may be customer-driven, established by the industry sectors in which we operate or imposed by third party organizations. For example, certain of these policies or standards may relate to overseas labor and may require us to comply with standards or policies to which we would not otherwise be subject. As a result of customer requirements and the need to enhance our competitive position, we may seek to obtain and maintain various certifications from third parties relating to our quality systems and standards.

Our compliance with these policies, standards and third party certification requirements could be costly, and our failure to comply could adversely affect our operations, customer relationships, reputation and profitability.

An inability to successfully manage the procurement, development, implementation or execution of information systems, or to adequately maintain these systems and their security, as well as to protect data and other confidential information, may adversely affect our business and reputation.

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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 and data security, privacy, reliability, compliance, 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 the ordinary course of business, we collect and store sensitive data and information, including our proprietary and regulated business information and that of our customers, suppliers and business partners, as well as personally identifiable information about our employees. Our information systems, like those of other companies, are susceptible to outages due to natural disasters, power loss, telecommunications failures, viruses, industrial espionage, break-ins and similar events, or breaches of security. We have taken steps to maintain adequate data security and address these risks and uncertainties by implementing security technologies, internal controls, network and data center resiliency and recovery processes. However, any operational failure or breach of security from increasingly sophisticated cyber threats could lead to the loss or disclosure of both our and our customers’ financial, product and other confidential information, result in regulatory actions and have a material adverse effect on our business and reputation.

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:

• retain our qualified engineering and technical personnel, and attract additional such personnel

• maintain and enhance our technological capabilities

• choose and maintain appropriate technological and service capabilities

• successfully manage the implementation and execution of information systems

• develop and market manufacturing services which meet changing customer needs and

• successfully anticipate, or respond to, technological changes on a cost-effective and timely basis.

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, and our need to maintain our personnel and other resources during times of fluctuating demand, could have an adverse effect on our business.

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

In the current environment, our revenue growth has been heavily biased toward ramping new program wins as compared to end-market growth of mature programs. The management of resources in connection with the establishment of new or recent programs and customer relationships, as well as program transfers between facilities, and the need to estimate required resources in advance of production can adversely affect our gross and operating margins and level of working capital. 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 production efficiencies in the early stages. We are managing a number of new programs at any given time; therefore, we are exposed to these factors in varying magnitudes. 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 meet customer needs, seek long-term efficiencies or respond 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.

While these factors tend to affect new, recent or transferred programs, they can also impact more mature, or maturing programs and customer relationships, especially programs where end-market demand can be somewhat volatile.

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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, and produce products for industries, such as health care, defense and aerospace, that tend to have higher risk profiles. Despite our quality control and quality assurance efforts, problems may occur, or may be alleged, in the design and/or manufacturing of these products, including as a result of business continuity issues. Whether or not we are responsible, problems in the products we manufacture, whether real or alleged, whether caused by faulty customer specifications, the design or manufacturing processes or a component defect, may result in delayed shipments to customers and/or reduced or canceled 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 inadequate, not cost effective or unavailable, either in general or for particular types of products or issues. 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:

• the inability of our customers to adapt to rapidly changing technology and evolving industry standards that result in short product life-cycles

• the inability of our customers to develop and market their products, some of which are new and untested and

• the potential that our customers’ products may become obsolete or the failure of our customers’ products to gain widespread commercial acceptance.

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 economic challenges affecting the industry and the economy as a whole. 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.

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Some of our competitors have a larger geographic footprint than we do, in addition to substantially greater managerial, manufacturing, engineering, technical, financial, systems, sales and marketing resources than ourselves. These competitors may:

• respond more quickly to new or emerging technologies

• have greater name recognition, critical mass and geographic and market presence

• be better able to take advantage of acquisition opportunities

• adapt more quickly to changes in customer requirements

• devote greater resources to the development, promotion and sale of their services and

• be better positioned to compete on price for their services.

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 may experience raw material and component shortages and price fluctuations.

We do not have any long-term supply agreements. At various times we have experienced raw material and component shortages due to supplier capacity constraints or their failure to deliver. Periodic shortages may occur in the future. Such constraints can also be caused by world events, such as government policies, terrorism, armed conflict, natural disasters, economic recession and other localized events. We rely on a limited number of suppliers for many of the raw materials and components 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. Such suppliers may encounter quality problems, labor disputes, financial difficulties or business continuity issues that could preclude them from delivering raw materials or components 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 components 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 materials and components 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 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 prices and other factors, we may 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, as a result of our pricing strategies and practices, raw material and component 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.

We depend on our workforce, including certain key personnel, and the loss of key personnel or other personnel disruptions, including the inability to hire and retain sufficient personnel, 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, including internationally, we need to attract and 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

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new or existing facilities we may be subject to local labor practices or union activities, wage pressure and changing wage requirements, increasing health care costs, differing employment laws and regulations in various countries, local competition for employees as well as high turnover, 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, breaches of security 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 tornadoes, 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, theft or espionage, 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.

Although we have implemented policies and procedures with respect to physical security, we remain at risk of unauthorized access to our facilities and the possible unauthorized use or theft of inventory, information or other physical assets. If unauthorized persons gain physical access to our facilities, or our physical assets or information are stolen or used in an unauthorized manner (whether through outside theft or industrial espionage), we could be subject to, among other consequences, negative publicity, governmental inquiry and oversight, loss of government contracts, litigation by affected parties and/or other future financial obligations related to the loss, misuse or theft of our or our customers' data, inventory or physical assets, any of which could have a material adverse effect on our reputation and results of operations.

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

We have increased our borrowings in recent years. However, we cannot be certain that our existing 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, to accommodate changes or developments in our business and operations. In addition, 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, either due to instability in the global financial markets or otherwise.

Our future success may depend on our ability to obtain additional financing and capital to support possible future growth and future initiatives. 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, as well as strategic arrangements, and may not successfully integrate acquired businesses or recognize the anticipated benefits, which could adversely affect our operating results.

We have previously grown, in part, through acquisitions and strategic arrangements. 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:

Operating risks, such as:

• the inability to integrate successfully our acquired operations’ businesses, systems and personnel

• the inability to realize anticipated synergies, economies of scale or other value

• the difficulties in scaling up production and coordinating management of operations at new sites

• the strain placed on our personnel, systems and resources

• the possible modification or termination of an acquired business’ customer programs, including the loss of customers and the cancellation of current or anticipated programs and

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• the loss of key employees of acquired businesses.

Financial risks, such as:

• the use of cash resources, or incurrence of additional debt and related interest expense

• the dilutive effect of the issuance of additional equity securities

• the inability to achieve expected operating margins to offset the increased fixed costs associated with acquisitions, and/or inability to increase margins of acquired businesses to our desired levels

• the incurrence of large write-offs or write-downs

• the impairment of goodwill and other intangible assets and

• the unforeseen liabilities of the acquired businesses.

The price of our common stock has been and may continue to be volatile.

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.

ITEM 1B. UNRESOLVED SEC STAFF COMMENTS

None.

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ITEM 2. PROPERTIES

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 3.9 million square feet of capacity. This includes approximately 2.1 million square feet in the Americas region (“AMER”) (of which 0.3 million square feet will close in fiscal 2014), approximately 1.4 million square feet in the Asia-Pacific region (“APAC”) and approximately 0.4 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 September 28, 2013, are described in the following table:

Location	Type	Size (sq. ft.)	Owned/Leased
Penang, Malaysia (1)	Manufacturing/Engineering	1,048,000	Owned
Neenah, Wisconsin (2)	Manufacturing	418,000	Owned
Oradea, Romania (3)	Manufacturing/Office	296,000	Owned
Neenah, Wisconsin (1,2,4)	Manufacturing	277,000	Leased
Appleton, Wisconsin (1,2)	Manufacturing	272,000	Owned
Nampa, Idaho	Manufacturing	216,000	Owned
Juarez, Mexico	Manufacturing	210,000	Leased
Xiamen, China (1,5)	Manufacturing/Office	193,000	Leased
Buffalo Grove, Illinois (1)	Manufacturing/Warehouse	163,000	Leased
Hangzhou, China	Manufacturing	117,000	Leased
Neenah, Wisconsin	Engineering/Office	105,000	Owned
Neenah, Wisconsin	Global Headquarters	104,000	Owned
Livingston, Scotland (6)	Manufacturing/Engineering	62,000	Leased
Kelso, Scotland	Manufacturing	57,000	Owned
Fremont, California	Manufacturing	46,000	Leased
Raleigh, North Carolina	Engineering	25,000	Leased
Louisville, Colorado	Engineering	24,000	Leased
Darmstadt, Germany	Engineering	16,000	Leased
San Diego, California (7)	Inactive/Other	198,000	Leased

(1) Includes more than one building.

(2) Construction of the Company's new facility in Neenah, Wisconsin was completed in fiscal 2013. This facility will replace one of the two facilities owned by the Company in Appleton, Wisconsin (67,000 square feet) and two facilities leased by the Company in Neenah, Wisconsin (comprising a total of 277,000 square feet). Consolidation of these three facilities into the new facility is expected to be complete in the first half of fiscal 2014.

(3) This facility opened in fiscal 2013 and replaced the previously leased buildings.

(4) Lease runs through August 2014. The Company will exit the lease upon its expiration and complete the transition into the new facility owned by the Company in Neenah, Wisconsin in fiscal 2014.

(5) Lease for the office portion of the facility runs through April 2014.

(6) Lease for a combined manufacturing and engineering facility was signed in February 2013 and runs through February 2018.

(7) This building is subleased and no longer used in operations.

In fiscal 2013, the Company did not renew the lease for its prior warehouse in Neenah, Wisconsin (39,000 square feet).

Construction of a new 265,000 square foot manufacturing facility in Guadalajara, Mexico began in late fiscal 2013 and is expected to be completed during the second half of fiscal 2014.  The Company entered into an agreement to lease the Guadalajara facility in the fourth quarter of fiscal 2013 that runs through fiscal 2024.  

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ITEM 3. LEGAL PROCEEDINGS

The Company is party to certain lawsuits and legal proceedings 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.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

EXECUTIVE OFFICERS OF THE REGISTRANT

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

Name	Age	Position
Dean A. Foate	55	Chairman, President and Chief Executive Officer
Ginger M. Jones	49	Senior Vice President and Chief Financial Officer
Todd P. Kelsey	48	Executive Vice President and Chief Operating Officer
Steven J. Frisch	47	Executive Vice President - Global Customer Services
Yong Jin Lim	53	Regional President - Plexus APAC
Angelo M. Ninivaggi	46	Senior Vice President, Chief Administrative Officer, General Counsel and Secretary
Michael T. Verstegen	55	Senior Vice President - Global Market Development

Dean A. Foate joined Plexus in 1984 and has served as Chairman since February 2013, 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.

Todd P. Kelsey joined Plexus in 1994 and has served as Executive Vice President and Chief Operating Officer since June 2013. Previously, Mr. Kelsey served as Executive Vice President – Global Customer Services since 2011 and as Senior Vice President prior thereto.

Steven J. Frisch joined Plexus in 1990 and has served as Executive Vice President - Global Customer Services since June 2013. Previously, Mr. Frisch was Regional President – Plexus EMEA from 2010 to 2013. Mr. Frisch also served as Senior Vice President – Global Engineering Solutions from 2007 to 2013.

Yong Jin Lim joined Plexus in 2002 and has served as Regional President – Plexus APAC since 2007.

Angelo M. Ninivaggi joined Plexus in 2002 and has served as Chief Administrative Officer since August 2013. Mr. Ninivaggi has also served as Vice President, General Counsel and Secretary since 2006 and was named Senior Vice President in 2011. Mr. Ninivaggi also served as Corporate Compliance Officer from 2007 to August 2013.

Michael T. Verstegen joined Plexus in 1983 and has served as Senior Vice President, Global Market Development since 2006.

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PART II

ITEM 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Price per Share

For the fiscal years ended September 28, 2013 and September 29, 2012, 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.

Fiscal Year Ended September 28, 2013			Fiscal Year Ended September 29, 2012
	High	Low		High	Low
First Quarter	$31.38	$19.63	First Quarter	$29.03	$21.06
Second Quarter	$27.36	$23.45	Second Quarter	$38.50	$27.03
Third Quarter	$30.67	$23.71	Third Quarter	$35.48	$26.69
Fourth Quarter	$37.29	$29.57	Fourth Quarter	$34.24	$26.40

Performance Graph

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 27, 2008, in Plexus common stock and in each of the indices as of the last business day of the respective fiscal year.

Comparison of Cumulative Total Return

	2008		2009		2010		2011		2012		2013
Plexus	$	100	$	117	$	142	$	104	$	140	$	170
NASDAQ-US	100		94		110		115		151		186
NASDAQ-Electronics	100		98		105		94		105		129

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Shareholders of Record; Dividends

As of November 18, 2013, there were 561 shareholders of record. We have not paid any cash dividends in the past. We currently anticipate that the majority of earnings in the foreseeable future will be retained to finance the development of our business and our authorized share repurchase. However, the Company evaluates from time to time potential uses of excess cash, which in the future may include additional 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.

Issuer Purchases of Equity Securities

The following table provides the specified information about the repurchases of shares by the Company during the three months ended September 28, 2013:

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*
June 30, 2013 to July 27, 2013	132,909	$	30.88	132,909	$	9,849,895
July 28, 2013 to August 24, 2013	125,493	34.82		125,493	$	5,480,655
August 25, 2013 to September 28, 2013	152,670	34.97		152,670	$	—
	411,072	$	33.60	411,072

* On October 23, 2012, the Board of Directors approved a stock repurchase program under which the Company was authorized to repurchase up to $50 million of its common stock. This program was completed in the fourth quarter of fiscal 2013. During fiscal 2013, the Company repurchased 1,821,698 shares under this program for approximately $49.9 million, at an average price of $27.37 per share. These shares were recorded as treasury stock.

On August 19, 2013, the Board of Directors approved a stock repurchase program under which the Company is authorized to repurchase up to $30 million of its common stock in fiscal 2014. Accordingly, since this program began subsequent to September 28, 2013, and no shares were purchased under this authorization in fiscal 2013, the $30 million is excluded from the table above.

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ITEM 6. SELECTED FINANCIAL DATA

Financial Highlights (dollars in thousands, except per share amounts)

	Fiscal Years Ended
Income Statement Data	September 28, 2013				September 29, 2012				October 1, 2011				October 2, 2010				October 3, 2009
Net sales	$	2,228,031			$	2,306,732			$	2,231,232			$	2,013,393			$	1,616,622
Gross profit	213,185				219,913				214,742				206,922				154,776
Gross margin percentage	9.6		%		9.5		%		9.6		%		10.3		%		9.6		%
Operating income	96,623				104,159				101,179				99,652				53,067			(2)
Operating margin percentage	4.3		%		4.5		%		4.5		%		4.9		%		3.3		%
Net income	82,259				62,089			(1)	89,256				89,533				46,327			(2)
Earnings per share (diluted)	$	2.36			$	1.75		(1)	$	2.30			$	2.19			$	1.17		(2)
Cash Flow Statement Data
Cash flows provided by operations	$	207,647			$	157,503			$	158,451			$	(7,639	)		$	170,296
Capital equipment additions	108,122				63,697				70,819				65,073				57,427
Balance Sheet Data
Working capital	$	607,646			$	619,934			$	553,893			$	523,472			$	459,113
Total assets	1,447,684				1,411,467				1,304,525				1,290,379				1,022,672
Long-term debt and capital lease obligations, net of current portion	257,773				260,211				270,292				112,466				133,163
Shareholders’ equity	699,301				649,022				558,882				651,855				527,446
Return on invested capital (3)	14.0		%		15.5		%	(1)	15.6		%		19.5		%		13.2		%
Inventory turnover ratio	5.1			x	4.6			x	4.4			x	3.7			x	4.5			x

(1) In fiscal 2012, we established a valuation allowance against our U.S. deferred tax assets resulting in an additional tax provision of approximately $20.6 million ($22.8 million provision, offset by $2.2 million to other comprehensive income) and a decrease in diluted earnings per share of $0.64. Return on invested capital excludes the $20.6 million net deferred tax asset reduction. An additional $1.3 million of valuation allowance established for fiscal 2012 relates to operating losses in Germany and Romania making the total valuation allowance for the year $24.1 million.

(2) In fiscal 2009, we recorded goodwill impairment charges related to our United Kingdom operations of $5.7 million. In addition, we recorded pre-tax restructuring costs totaling $2.8 million which related primarily to the reduction of workforce in the United States and Mexico as well as fixed assets written down related to the closure of our Ayer, Massachusetts ("Ayer") facility. A favorable tax adjustment of approximately $1.4 million, primarily related to the conclusion of federal and state audits, was also recorded.

(3) The Company defines return on invested capital as tax-effected annualized operating income divided by average invested capital over a rolling five-quarter period. Invested capital is defined as equity plus debt, less cash and cash equivalents, as discussed in Part II, Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations."

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ITEM 7. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

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"), Europe, Middle East and Africa ("EMEA") and Asia-Pacific ("APAC") regions. Customer service is provided to over 140 branded product companies in the Networking/Communications, Healthcare/Life Sciences, 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.

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.

Recent Developments

As previously disclosed, in fiscal 2013, Juniper Networks, Inc. ("Juniper") disengaged from Plexus. Production for Juniper concluded at the end of our third fiscal quarter of 2013 and sales of inventory concluded in our fourth fiscal quarter of 2013. We incurred approximately $0.6 million of severance and asset impairment costs in connection with the disengagement in the third quarter of fiscal 2013; no further related costs are expected. Sales to Juniper were 13% of our net sales in fiscal 2013 as compared to 16% in fiscal 2012, and were from the Company's AMER and APAC segments. We expect no further shipments to Juniper in fiscal 2014.

Our new Neenah, Wisconsin manufacturing facility, which will replace one owned and two leased facilities, opened in the fiscal first quarter of 2014. Consolidation of the three other facilities into our new facility is expected to result in approximately $3.0 to $4.0 million of restructuring charges in the first half of fiscal 2014.

RESULTS OF OPERATIONS

Consolidated Performance Summary

The following table presents selected consolidated financial data for fiscal 2013, 2012 and 2011 (dollars in millions, except per share data):

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	2013			2012				2011
Net sales	$	2,228.0		$	2,306.7			$	2,231.2
Gross profit	213.2			219.9				214.7
Gross margin	9.6		%	9.5		%		9.6		%
Operating income	96.6			104.2				101.2
Operating margin	4.3		%	4.5		%		4.5		%
Net income	82.3			62.1			*	89.3
Earnings per share (diluted)	$	2.36		$	1.75		*	$	2.30
Return on invested capital	14.0		%	15.5		%		15.6		%
*See Note 7 in Notes to Consolidated Financial Statements for discussion regarding the fiscal 2012 valuation allowance for deferred tax assets.

Net sales. Net sales for fiscal 2013 decreased $78.7 million, or 3.4 percent, as compared to fiscal 2012. The net sales decrease was primarily the result of a $113.6 million decrease in net sales for one of our larger customers in the industrial/commercial sector, as a result of its decreased end-market demand, as well as an $85.3 million decrease in net sales to Juniper, as a result of its disengagement and lower end-market demand for the products we produced for Juniper. These decreases were partially offset by a $102.4 million increase in net sales to various significant customers in all sectors.

Net sales for fiscal 2012 increased $75.5 million, or 3.4 percent, as compared to fiscal 2011. The net sales increase resulted from higher net sales in all of our market sectors, except for a decrease in the networking/communications sector. The net sales increase primarily related to the continued ramp of production for a significant industrial/commercial sector customer and $81.9 million of incremental revenue from the strategic arrangement with Kontron (the "Kontron arrangement"), as well as program ramps from several other existing customers. These increases in net sales were partially offset by decreased sales in the networking/communications sector due to lower end-market demand and two customer disengagements as a result of the acquisition of such customers by other companies.

Our net sales by market sector for fiscal 2013, 2012 and 2011 were as follows (in millions):

Market Sector	2013		2012		2011
Networking/Communications	$	826.3	$	903.6	$	1,029.9
Industrial/Commercial	551.0		670.8		528.0
Healthcare/Life Sciences	563.2		494.4		470.2
Defense/Security/Aerospace	287.5		237.9		203.1
	$	2,228.0	$	2,306.7	$	2,231.2

Networking/Communications. Net sales for the networking/communications sector decreased $77.3 million for fiscal 2013 compared to fiscal 2012. The change was primarily the result of an $85.3 million decrease in net sales to Juniper, related to its disengagement, partially offset by increased sales to existing customers in this sector as well as program ramps with new customers.

Net sales for the networking/communications sector decreased $126.3 million for fiscal 2012 compared to fiscal 2011. The decline in the sector was primarily the result of the $74.9 million impact from the fiscal 2011 disengagement of two significant customers noted above and overall unfavorable end-market trends reflecting global economic uncertainty. Net sales to Juniper in fiscal 2012 did not change significantly from fiscal 2011.

Industrial/Commercial. Net sales for the industrial/commercial sector decreased $119.8 million for fiscal 2013 compared to fiscal 2012. The decrease was primarily a result of decreased end-market demand for one of our larger customers in the sector, which accounted for $113.6 million of the decreased net sales as compared to the prior year.

Net sales for the industrial/commercial sector increased $142.8 million for fiscal 2012 compared to fiscal 2011. The increase was primarily attributable to the continued ramp of a significant customer and $81.9 million of incremental revenue related to the Kontron arrangement, as well as the addition of a new customer in this sector.

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Healthcare/Life Sciences. Net sales for the healthcare/life sciences sector increased $68.8 million for fiscal 2013 compared to fiscal 2012. The increase was primarily due to market share gains and new program ramps with existing customers.

Net sales for the healthcare/life sciences sector increased $24.2 million for fiscal 2012 compared to fiscal 2011. The increase was primarily due to market share gain and new programs with existing customers.

Defense/Security/Aerospace. Net sales for the defense/security/aerospace sector increased $49.6 million for fiscal 2013 compared to fiscal 2012. The increase was the result of new program ramps as well as increased end-market demand for the products we produce for our customers.

Net sales for the defense/security/aerospace sector increased $34.8 million for fiscal 2012 compared to fiscal 2011. The increase was primarily due to stronger end-market demand in the aerospace market as well as the addition of a new customer in this sector.

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The percentages of net sales to customers representing 10 percent or more of net sales and net sales to our ten largest customers for fiscal 2013, 2012 and 2011 were as follows:

	2013	2012	2011
Juniper	13%	16%	17%
Top 10 customers	55%	60%	55%

Juniper disengaged from Plexus in fiscal 2013 and we expect no further shipments to Juniper in fiscal 2014.

Gross profit. For fiscal 2013, gross profit decreased $6.7 million, or 3.1%, compared to fiscal 2012 primarily due to decreased net sales, increased fixed expenses related to site expansions in Penang, Malaysia, Xiamen, China and Oradea, Romania and unfavorable changes in customer mix. The decrease was partially offset by the sale of certain inventory that had previously been written down. A slightly larger percentage decrease in revenue as compared to the decrease in gross profit for fiscal 2013 led to an increase in gross margin to 9.6 percent for fiscal 2013 from 9.5 percent for fiscal 2012.

For fiscal 2012, gross profit increased $5.2 million compared to fiscal 2011 primarily due to the net sales increase. The increase was partially offset by increased fixed expenses related to higher headcount to support the revenue growth, costs related to the addition of a fourth facility in Penang, Malaysia of approximately $5.9 million, transition costs due to the Kontron arrangement, and an unfavorable change in customer mix. Customer mix negatively impacted gross profit due to a higher portion of sales from new programs, which tend to be inherently less profitable during early production stages than mature programs. Gross profit was also negatively impacted by escalated pricing pressure, particularly in our networking/communications sector. These factors led to the reduction in gross margin to 9.5 percent for fiscal 2012 from 9.6 percent for fiscal 2011.

Operating income. For fiscal 2013, operating income decreased $7.5 million compared to fiscal 2012. The operating income decrease reflected the $6.7 million decrease in gross profit described above as well as a $0.8 million increase in selling and administrative expenses (“S&A”). The dollar increase in S&A was primarily due to approximately $2.4 million of recoveries of receivables previously at risk in the prior fiscal year, with no such recovery in the current fiscal year, and approximately $0.8 million of additional amortization expense in fiscal 2013 related to the Kontron arrangement. These increases were partially offset by a $1.3 million decrease in incentive compensation expense and additional reductions due to focused cost management efforts. As a result of the factors discussed above, for fiscal 2013 compared to fiscal 2012, operating margin decreased from 4.5 percent to 4.3 percent.

For fiscal 2012, operating income increased $3.0 million compared to fiscal 2011. The operating income increase reflected the $5.2 million increase in gross profit described above, partially offset by a $2.2 million increase in S&A. The dollar increase in S&A was primarily due to a $1.5 million increase in stock-based compensation expense, $1.3 million of amortization expense resulting from an intangible asset related to the Kontron arrangement and an increase in other personnel expenses. These increases were partially offset by approximately $2.4 million of recoveries of receivables previously at risk. As a result of the factors discussed above, for fiscal 2012 compared to fiscal 2011, operating margin remained at 4.5 percent.

Other income (expense). Other expense decreased to $11.6 million for fiscal 2013 from $12.9 million for fiscal 2012. The decrease in expense was largely due to $3.4 million of decreased interest expense related to our term loan. Interest rate swaps associated with the original term loan expired in fiscal 2013. This resulted in lower floating interest rates prior to the establishment of a new interest rate swap agreement and lower fixed interest rates subsequent to the establishment of the new interest rate swap agreement. This decrease was offset by a $1.4 million increase in foreign exchange losses and a $0.8 million increase in other expense as the result of an accrual for property-related expenses related to the termination of an agreement for additional land in Hangzhou, China.

Other expense increased to $12.9 million for fiscal 2012 from $9.1 million for fiscal 2011. The increase in expense was largely due to $4.4 million of increased interest expense primarily related to the $175 million of borrowings under the Note Purchase Agreement that the Company entered into during the third quarter of fiscal 2011, as discussed in "Liquidity and Capital Resources" below.

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Income taxes. Income taxes and effective annual income tax rates, with and without the annual valuation allowance, for fiscal 2013, 2012 and 2011 were as follows (dollars in millions):

	2013			2012			2011
Income tax expense, as reported	$	2.7		$	29.1		$	2.8
Valuation allowance (expense)	(7.0		)	(24.1		)	(1.2		)
Income tax (benefit) expense, as adjusted*	$	(4.3	)	$	5.0		$	1.6
Effective annual tax rate, as reported	3.2		%	31.9		%	3.1		%
Impact of valuation allowance	(8.2		)%	(26.4		)%	(1.4		)%
Effective annual tax rate, as adjusted*	(5.0		)%	5.5		%	1.7		%

*The Company believes that the non-GAAP presentation of income tax expense and effective annual tax rate excluding the impact of the valuation allowance provides a more accurate representation and allows for a more meaningful comparison of reporting periods.

Income tax expense for fiscal 2013 was $2.7 million compared to $29.1 million for fiscal 2012 and $2.8 million for fiscal 2011. The Company's effective annual tax rates primarily vary from the U.S. statutory rate of 35 percent as a result of the mix of earnings from U.S. and foreign jurisdictions and tax holidays granted to our subsidiaries in China and Malaysia, where we derive a significant portion of our earnings. The effective tax rate for fiscal 2013 is significantly lower than the effective rate for fiscal 2012 primarily as a result of the additional valuation allowance recorded in fiscal 2012 on deferred tax assets in the U.S. and discrete tax benefits recorded in 2013, which are further discussed below.

During the preparation of the fiscal 2012 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 U.S. deferred tax assets, consistent with the provisions of ASC Topic 740, “Income Taxes.” Accordingly, as of September 29, 2012, the Company established an additional valuation allowance against the U.S. deferred tax assets, impacting the tax provision by $22.8 million. The additional $1.3 million of the $24.1 million valuation allowance shown above for fiscal 2012 relates to operating losses in Germany and Romania. The Company continues to assess the need to maintain the valuation allowance established on the U.S. deferred tax assets. At the close of fiscal 2013, using the measurement criteria found in ASC Topic 740, the Company believes that the positive evidence does not outweigh the negative and the valuation allowance should remain in place.

In fiscal 2013 the Company recorded an additional valuation allowance of $7.0 million for the full year. During the fourth quarter of fiscal 2013, the Company identified and recorded a discrete tax adjustment placing a full valuation allowance on the net deferred tax assets of our U.K. operations, which increased tax expense by $1.8 million ($0.05 per diluted share). Our analysis found that in the fourth quarter of fiscal 2013, the U.K. operations experienced an unanticipated material decline in sales resulting in a loss in fiscal 2013; losses are forecasted to continue into fiscal 2014. While we expect our U.K. operations to regain profitability, the current, forecasted and cumulative losses are substantial negative evidence. The remaining $5.2 million of the $7.0 million valuation allowance shown above for fiscal 2013 relates to operating losses, primarily in the U.S., Germany and Romania. Having examined the evidence, both positive and negative, it was determined that it is more likely than not that these deferred tax assets will not be utilized and should have a valuation allowance placed against them.

In the fourth quarter of fiscal 2013 the Company identified and recorded several out-of-period tax errors that reduced tax expense by $3.2 million ($0.09 per diluted share). The Company believes these out-of-period tax errors were not material to the fiscal 2013, or previously issued, financial statements.

We currently expect the annual effective tax rate for fiscal 2014 to be approximately 8 to 10 percent.

The Company has been granted tax holidays for its Malaysian and Xiamen, China subsidiaries. These tax holidays expire in fiscal 2024 and 2014, respectively, and are subject to certain conditions with which the Company expects to comply. The expiration of the tax holiday in China is not expected to have a material impact on the effective tax rate or on the results of operations. However, we cannot provide any assurances as to the effect and will continue to monitor the projected impact. In fiscal 2013, 2012 and 2011, these subsidiaries generated income, which resulted in tax reductions of approximately $22.7 million ($0.66 per basic share), $17.5 million ($0.50 per basic share) and $21.7 million ($0.57 per basic share), respectively.

Net Income. Net income, with and without the annual valuation allowance and out-of-period tax adjustments, for fiscal 2013, 2012 and 2011 was as follows (dollars in millions):

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	2013			2012		2011
Net income, as reported	$	82.3		$	62.1	$	89.3
Valuation allowance	7.0			24.1		1.2
Out-of-period tax adjustments	(3.2		)	—		—
Net income, as adjusted*	$	86.1		$	86.2	$	90.5

*The Company believes that the non-GAAP presentation of net income excluding valuation allowances and out-of-period tax adjustments provides a more meaningful comparison of reporting periods.

Net income for fiscal 2013 increased by $20.2 million, or 32.5 percent, to $82.3 million from fiscal 2012. This increase was primarily as a result of the net $17.1 million year-over-year valuation allowance adjustment. Excluding the valuation allowance and fourth quarter tax out-of-period adjustments, fiscal 2013 net income decreased by $0.1 million, or 0.1 percent, from fiscal 2012 to $86.1 million.

Primarily as a result of the $24.1 million valuation allowance adjustment, net income for fiscal 2012 decreased by $27.2 million, or 30.4 percent, to $62.1 million from fiscal 2011. Excluding the valuation allowance adjustment, net income was $86.2 million, a decrease of $4.3 million, or 4.8 percent from fiscal 2011 as a result of higher fixed expenses and increased interest expense, partially offset by the effect of higher net sales.

Diluted earnings per share. Diluted earnings per share, with and without the annual valuation allowance and out-of-period tax adjustments, for fiscal 2013, 2012 and 2011 was as follows:

	2013			2012		2011
Diluted earnings per share, as reported	$	2.36		$	1.75	$	2.30
Valuation allowance	0.20			0.68		0.03
Out-of-period tax adjustments	(0.09		)	—		—
Diluted earnings per share, as adjusted*	$	2.47		$	2.43	$	2.33

*The Company believes that the non-GAAP presentation of diluted earnings per share excluding valuation allowances and out-of-period tax adjustments provides a more meaningful comparison of reporting periods.

Diluted earnings per share increased to $2.36 for fiscal 2013 from $1.75 for fiscal 2012 primarily as a result of the impact of the valuation allowances and fourth quarter out-of-period tax adjustments discussed above. Excluding the impact of the valuation allowances and out-of-period tax adjustments, diluted earnings per share increased by $0.04 in fiscal 2013 as compared to fiscal 2012. The increase in diluted earnings per share, as adjusted was primarily due to the positive impact of fewer outstanding shares in 2013 due to the stock repurchase program.

Diluted earnings per share decreased to $1.75 for fiscal 2012 from $2.30 for fiscal 2011 primarily as a result of the valuation allowance adjustment discussed above. Excluding the $0.68 per share impact of the valuation allowance adjustment, diluted earnings per share increased to $2.43 for fiscal 2012. The increase in diluted earnings per share excluding the valuation allowance adjustment was primarily due to the effect of a decrease in diluted weighted average shares outstanding as a result of our share repurchases completed late in fiscal 2011, partially offset by lower net income.

Return on Invested Capital (“ROIC”). We use a 5-5 financial model which is aligned with our business strategy, and includes a ROIC goal of 5% over our weighted average cost of capital (“WACC”) and a 5% operating margin target. Our primary focus is our ROIC goal, which is designed to create shareholder value and generate enough cash to self-fund our targeted organic revenue growth rate of 15%. For fiscal 2014 and forward, we have reduced our targeted organic revenue growth rate to 12% to reflect opportunities in the markets we serve.

We review our internal calculation of WACC annually; at the end of fiscal 2013 we reduced our estimated WACC from 12.0% to 11.0% for fiscal 2014. By exercising discipline to generate ROIC in excess of our WACC, our goal is to create value for our shareholders. ROIC was 14.0%, 15.5% (excluding $20.6 million net deferred tax asset reduction) and 15.6% for fiscal 2013, 2012 and 2011, respectively. The decrease in ROIC in fiscal 2013 from fiscal 2012 was due to lower operating income and an increase in average invested capital as a result of capital expenditures for facility expansions. See the table below for our calculation of ROIC (dollars in millions):

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	2013			2012			2011
Operating income (tax effected)	$	89.9		$	96.9		$	98.1
Average invested capital	642.1			623.0			627.6
After-tax ROIC	14.0		%	15.5		%	15.6		%

We define ROIC as tax-effected annualized operating income divided by average invested capital over a rolling five-quarter period for the fiscal year. Invested capital is defined as equity plus debt, less cash and cash equivalents. Other companies may not define or calculate ROIC in the same way. ROIC is a non-GAAP financial measure which should be considered in addition to, not as a substitute for, measures of our 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 because we view ROIC as an important measure in evaluating the efficiency and effectiveness of our long-term capital requirements. We also use a derivative measure of ROIC as a performance criteria in determining certain elements of compensation.

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.

REPORTABLE SEGMENTS

A further discussion of our fiscal 2013, 2012 and 2011 financial performance by reportable segment is presented below (in millions):

	2013			2012			2011
Net sales:
AMER	$	1,062.8		$	1,255.9		$	1,304.9
APAC	1,146.3			1,110.4			1,063.1
EMEA	122.5			95.4			92.2
Elimination of inter-segment sales	(103.6		)	(155.0		)	(229.0		)
	$	2,228.0		$	2,306.7		$	2,231.2
Operating income (loss):
AMER	$	70.9		$	91.1		$	68.7
APAC	116.3			101.9			118.1
EMEA	(3.1		)	(2.3		)	(3.0		)
Corporate and other costs	(87.5		)	(86.5		)	(82.6		)
	$	96.6		$	104.2		$	101.2

Americas (AMER):

Net sales for fiscal 2013 decreased $193.1 million, or 15.4 percent, from fiscal 2012, due primarily to $113.6 million of decreased sales resulting from lower end-market demand from a significant industrial/commercial sector customer as well as a $71.1 million decrease in net sales due to a drop in demand from Juniper related to its disengagement and lower end-market demand for the products we produced for Juniper. Operating income for fiscal 2013 decreased $20.2 million from fiscal 2012 due primarily to the decrease in net sales.

Net sales for fiscal 2012 decreased $49.0 million, or 3.8 percent, from fiscal 2011, primarily as a result of decreased end-market demand in the networking/communications sector, which included the loss of two significant networking/communications customers, one as a result of a customer disengagement and the other as a result of a drop in end-market demand for the mix of products we produced for that customer. These decreases were partially offset by the ramp of production for a significant industrial/commercial sector customer and the addition of a new customer in this sector as well. Net sales to Juniper in fiscal 2012 did not change significantly from fiscal 2011. Operating income for fiscal 2012 increased $22.4 million from fiscal 2011 due to a favorable customer mix, an increase in engineering design and services profitability of approximately $5.1 million and $2.4 million of recoveries of receivables previously at risk.

Asia-Pacific (APAC):

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Net sales for fiscal 2013 increased $35.9 million, or 3.2 percent, from fiscal 2012. The increase in net sales was primarily experienced in the healthcare/life sciences sector as a result of new program wins which more than offset the $14.2 million decrease in sales to Juniper as a result of its disengagement. Operating income increased $14.4 million in fiscal 2013 as compared to fiscal 2012, primarily as a result of the increase in net sales and favorable changes in customer mix combined with higher costs incurred in fiscal 2012 related to facility expansion and the Kontron arrangement.

Net sales for fiscal 2012 increased $47.3 million, or 4.4 percent, from fiscal 2011. This growth reflected incremental revenue from the Kontron arrangement of approximately $81.9 million as well as higher net sales to multiple customers across our market sectors. These increases were partially offset by decreased net sales from the disengagement of one customer in the networking/communications sector and a decline in end-market demand for the mix of products we produce for another customer in this sector as well for an industrial/commercial sector customer. Operating income decreased $16.2 million in fiscal 2012 as compared to fiscal 2011, primarily as a result of costs related to the addition of a fourth facility in Penang, Malaysia of approximately $5.9 million, increased expenses related to higher headcount to support capacity investments, transition costs for the Kontron arrangement and escalated pricing pressure.

Europe, Middle East and Africa (EMEA):

Net sales for fiscal 2013 increased $27.1 million, or 28.4 percent, from fiscal 2012. The increase in net sales was driven primarily by approximately $22.0 million from the ramp of new customers in each of our market sectors, partially offset by decreased net sales of $8.5 million due to the disengagement of an industrial/commercial customer. Operating loss increased in the current year as compared to the prior year due to an increase in fixed costs associated with the new facility in Oradea, Romania and the ramping of new customers at the United Kingdom facility. An increase in labor and parts costs in the fourth quarter of 2013 also contributed to the increased operating loss.

Net sales for fiscal 2012 increased $3.2 million, or 3.5 percent, from fiscal 2011. The increase in net sales was driven primarily by the addition of new customers in each of our market sectors, partially offset by decreased net sales to an industrial/commercial customer as a result of reduced end-market demand for the mix of products we produce for that customer. Operating results improved in fiscal 2012 as compared to fiscal 2011 due to increased profitability in Romania based on the mix of customers and increased leverage at the facility.

LIQUIDITY AND CAPITAL RESOURCES

Cash and cash equivalents were $341.9 million as of September 28, 2013 compared to $297.6 million as of September 29, 2012. The increase in the balance of our cash and cash equivalents was due primarily to cash generated from operations, partially offset by purchases of common stock as part of our stock repurchase program as well as increased capital expenditures for footprint expansions.

As of September 28, 2013, approximately 87% of our cash balance was held outside of the U.S. by our foreign subsidiaries. Certain foreign countries impose taxes and overall penalties on transfers of cash; however, our intent is to permanently reinvest funds held in these countries. If this cash were remitted to the U.S., additional tax obligations may result that would reduce the amount of cash ultimately available to us in the U.S. Currently, we believe that cash held in the U.S., together with cash available under U.S. credit facilities and cash from foreign subsidiaries that could be remitted to the U.S. without tax consequences, will be sufficient to meet our U.S. liquidity needs for the next twelve months and for the foreseeable future.

Cash Flows. The table below shows a summary of cash flows for fiscal 2013, 2012 and 2011 (in millions):

	2013			2012			2011
Cash provided by operating activities	$	207.6		$	157.5		$	158.5
Cash used in investing activities	$	(107.2	)	$	(92.2	)	$	(68.7	)
Cash used in financing activities	$	(57.4	)	$	(10.8	)	$	(37.0	)

Operating Activities. Cash flows provided by operating activities were $207.6 million for fiscal 2013, as compared to cash flows provided by operating activities of $157.5 million for fiscal 2012. Cash flows provided by operating activities increased due to overall improved working capital management as discussed below.

Cash flows provided by operating activities were $157.5 million for fiscal 2012, as compared to cash flows provided by operating activities of $158.5 million for fiscal 2011. Cash flows provided by operating activities decreased slightly due to lower net income, partially offset by overall improved working capital management.

The following table shows a summary of cash cycle days for the periods indicated (in days):

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	Three months ended
	September 28, 2013	September 29, 2012	October 1, 2011
Days in accounts receivable	49	49	48
Days in inventory	72	78	85
Days in accounts payable	(56)	(58)	(57)
Days in cash deposits	(12)	(6)	(6)
Annualized cash cycle	53	63	70

We calculate days in accounts receivable as accounts receivable for the respective quarter divided by annualized sales for the respective quarter by day. We calculate days in inventory, accounts payable, and cash deposits as each balance sheet line item for the respective quarter divided by annualized cost of sales for the respective quarter by day.

Days in accounts receivable for the three months endedSeptember 28, 2013 remained consistent compared to the three months endedSeptember 29, 2012.

Days in inventory for the three months endedSeptember 28, 2013 decreased by six days compared to the three months endedSeptember 29, 2012, due to a decrease in year-end inventory balances resulting primarily from shipments to Juniper as a consequence of its disengagement.

Days in accounts payable for the three months endedSeptember 28, 2013 decreased by two days compared to the three months endedSeptember 29, 2012, primarily due to the timing of the purchases during the quarter.

Days in cash deposits for the three months endedSeptember 28, 2013 increased by six days compared to the three months endedSeptember 29, 2012 primarily due to cash deposits received from Juniper as a result of its disengagement. As of September 28, 2013, the Company held $11.0 million in inventory deposits and $15.3 million in accounts receivable deposits from Juniper.

We calculate cash cycle as the sum of days in accounts receivable and days in inventory, less days in accounts payable and days in cash deposits. As of September 28, 2013 cash cycle days decreased by ten days compared to September 29, 2012 due to the factors noted above.

Free Cash Flow. Free cash flow (“FCF”), which we define as cash flow provided by (used in) operations less capital expenditures, increased for fiscal 2013, to $99.5 million, as compared to FCF of $93.8 million for fiscal 2012. Although operating income decreased in fiscal 2013, the decrease was more than offset by reduced working capital, as evidenced by the ten day decrease in cash cycle days, as described above, which led to higher FCF.

Non-GAAP financial measures, including FCF, are used for internal management assessments because such measures provide additional insight into ongoing financial performance. In particular, we provide FCF because we believe it offers insight into the metrics that are driving management decisions. We view FCF as an important financial metric as it demonstrates our ability to generate cash and allows us to pursue opportunities that enhance shareholder value. FCF is a non-GAAP financial measure which should be considered in addition to, not as a substitute for, measures of our financial performance prepared in accordance with U.S. GAAP.

For a reconciliation of FCF to our financial statements that were prepared using GAAP, see below (in millions):

	2013			2012			2011
Cash provided by operating activities	$	207.6		$	157.5		$	158.4
Capital expenditures	(108.1		)	(63.7		)	(70.8		)
Free cash flow	$	99.5		$	93.8		$	87.6

Investing Activities. Cash flows used in investing activities totaled $107.2 million for fiscal 2013 as compared to cash flows used in investing activities of $92.2 million for fiscal 2012. Cash flows used in investing activities increased primarily due to the additional investments in footprint expansions partially offset by the prior period including the Kontron arrangement. Cash flows used in investing activities for fiscal 2012 increased to $92.2 million from $68.7 million in fiscal 2011 primarily due to

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the expenditure of $34.2 million of cash related to the Kontron arrangement in fiscal 2012 (see Note 2 in Notes to Consolidated Financial Statements for information regarding the Kontron arrangement).

We utilized available cash and operating cash flows as the sources for funding our operating requirements during fiscal 2013. We currently estimate capital expenditures for fiscal 2014 will be approximately $75 million. A portion of the fiscal 2014 capital expenditures are anticipated to be used for leasehold improvements for a new leased manufacturing facility in Guadalajara, Mexico. We believe the estimated capital expenditures will continue to be funded from operations, and may be supplemented by short-term borrowings, if required.

Financing Activities.Cash flows used in financing activities totaled $57.4 million for fiscal 2013, as compared to cash flows used in financing activities of $10.8 million for fiscal 2012. Cash flows used in financing activities for fiscal 2013 were comprised primarily of $49.9 million of purchases of common stock as part of our stock repurchase program as well as payments on debt and capital leases. Cash flows used in financing activities for fiscal 2012 were comprised primarily of payments on debt, partially offset by debt proceeds 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 for approximately 200.0 million, at an average price of $31.69 per share. These shares were recorded as treasury stock.

On October 23, 2012, the Board of Directors approved a stock repurchase program under which the Company was authorized to repurchase up to $50 million of its common stock. This program was completed in the fourth quarter of fiscal 2013. During fiscal 2013, the Company repurchased 1,821,698 shares under this program for approximately $49.9 million, at an average price of $27.37 per share. These shares were recorded as treasury stock.

On August 19, 2013, the Board of Directors approved a stock repurchase program under which the Company is authorized to repurchase up to $30 million of its common stock in fiscal 2014. Accordingly, no shares were purchased under this authorization in fiscal 2013.

On May 15, 2012, the Company entered into a five-year, $250 million senior unsecured credit facility that terminates on May 15, 2017 (the “Credit Facility”). The Credit Facility includes a $160 million revolving credit facility and a $90 million term loan. The revolving credit facility potentially may be increased by $100 million (the "increase option") to $260 million generally by mutual agreement of the Company, the lenders, the letter of credit issuers and the administrative agent named in the related credit agreement (the "Credit Agreement"), subject to certain customary conditions. Quarterly principal repayments of the Credit Facility term loan of $3.75 million per quarter ended on March 28, 2013. The final $75 million payment is due on May 15, 2017.

The financial covenants (as defined under the Credit Facility) require that the Company maintain, as of each fiscal quarter end, a maximum total leverage ratio and a minimum interest coverage ratio. As of September 28, 2013, the Company was in compliance with all covenants of the Credit Facility. Borrowings under the Credit Facility, at the Company's option, bear interest at a defined base rate or the LIBOR rate plus, in each case, an applicable margin based upon the Company's leverage ratio as defined in the Credit Agreement. 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% or base rate plus 0%. We are also required to pay an annual commitment fee on the unused revolver credit commitment based on our leverage ratio; as of September 28, 2013, the fee was 0.20%. On April 4, 2013, the original interest rate swaps associated with our term loan expired, and on June 4, 2013, the Company entered into a new interest rate swap associated with the term loan which extends through May 5, 2017. As of September 28, 2013, all outstanding debt under the Credit Facility is at a fixed interest rate as a result of a fixed interest rate swap contract. There is no floating rate debt outstanding under the Credit Facility as of September 28, 2013.

The Company also has outstanding 5.20% Senior Notes, due on June 15, 2018 (the "Notes"); $175 million principal of the Notes was outstanding as of both September 28, 2013 and September 29, 2012.

The related Note Purchase Agreement contains certain financial covenants, which include a maximum total leverage ratio, a minimum interest coverage ratio and a minimum net worth test, all as defined in the agreements. As of September 28, 2013, we were in compliance with all such covenants relating to the Notes and the Note Purchase Agreement, which are consistent with those in the Credit Agreement discussed above.

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The Credit Facility and Note Purchase Agreement allow 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. We have not paid cash dividends in the past and do not currently anticipate paying them in the future. However, we evaluate from time to time potential uses of excess cash, which in the future may include share repurchases above those already authorized, a special dividend or recurring dividends.

Based on current expectations, we believe that our projected cash flows from operations, available cash and cash equivalents, potential borrowings under the Credit Facility, and our leasing capabilities should be sufficient to meet our working capital and fixed capital requirements for the next twelve months and for the foreseeable future. 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 uncertainty of the credit and financial markets, we cannot be assured that we will be able to make any such arrangements on acceptable terms.

CONTRACTUAL OBLIGATIONS, COMMITMENTS AND OFF-BALANCE SHEET OBLIGATIONS

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 September 28, 2013 (dollars in millions):

	Payments Due by Fiscal Year
Contractual Obligations	Total		2014		2015-2016		2017-2018		2019 and thereafter
Long-Term Debt Obligations (1,2)	$	297.3	$	10.4	$	20.9	$	266.0	$	—
Capital Lease Obligations	13.0		4.6		7.8		0.6		—
Operating Lease Obligations	46.0		12.7		14.6		6.6		12.1
Purchase Obligations (3)	410.0		405.1		4.7		0.1		0.1
Other Long-Term Liabilities on the Balance Sheet (4)	9.3		1.4		1.6		0.4		5.9
Other Long-Term Liabilities not on the Balance Sheet (5)	19.8		17.8		2.0		—		—
Total Contractual Cash Obligations	$	795.4	$	452.0	$	51.6	$	273.7	$	18.1

1) Includes amounts outstanding under the Credit Facility. As of September 28, 2013, the outstanding balance was $75.0 million. The amounts listed above include interest; see Note 5 in Notes to Consolidated Financial Statements for further information.

2) Includes $175 million in principal amount of Notes issued in fiscal 2011. The amounts listed above include interest; see Note 5 in Notes to Consolidated Financial Statements for further information.

3) As of September 28, 2013, purchase obligations consist of purchases of inventory and equipment in the ordinary course of business.

4) As of September 28, 2013, other long-term obligations on the balance sheet included deferred compensation obligations to certain of our former and current executive officers, as well as other key employees, and an asset retirement obligation. We have excluded from the above table the impact of approximately $7.4 million, as of September 28, 2013, related to unrecognized income tax benefits. The Company cannot make reliable estimates of the future cash flows by period related to this obligation.

5) As of September 28, 2013, other long-term obligations not on the balance sheet consisted of a commitment for salary continuation in the event employment of one executive officer of the Company is terminated without cause as well as commitments to complete new manufacturing facilities in Guadalajara, Mexico, Neenah, Wisconsin and Oradea, Romania.

DISCLOSURE ABOUT CRITICAL ACCOUNTING POLICIES

Our accounting policies are disclosed in Note 1 of Notes to the Consolidated Financial Statements. During fiscal 2013, there were no material changes to these policies. Our more critical accounting policies are noted below:

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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 comprehensive income 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 comprehensive income 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 10 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.

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 6 – 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. 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.

NEW ACCOUNTING PRONOUNCEMENTS

See Note 1, "Description of Business and Significant Accounting Policies," in Notes to Consolidated Financial Statements regarding recent accounting pronouncements.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

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

Foreign Currency Risk

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.

Our percentages of transactions denominated in currencies other than the U.S. dollar for fiscal 2013, 2012, and 2011 were as follows:

	2013	2012	2011
Net Sales	7%	5%	6%
Total Costs	11%	14%	14%

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 September 28, 2013, 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.

Interest Rate Risk

We have financial instruments, including cash equivalents, which are sensitive to changes in interest rates. We consider the use of interest rate swaps based on existing market conditions and have entered into interest rate swaps for our term loans. For more information, refer to Note 6, "Derivatives and Fair Value Measurements," in Notes to Consolidated Financial Statements. Interest rate swap 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 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.

As of September 28, 2013, our only material interest rate risk is associated with our term loan under our Credit Facility. Through the use of interest rate swaps, as described above, we fixed the basis on which we pay interest, and the borrowings under the Note Purchase Agreement are based on a fixed interest rate, thus eliminating much of our interest rate risk.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

See Part IV, Item 15 on page 40.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A. CONTROLS AND PROCEDURES

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

37

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 September 28, 2013, 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 September 28, 2013, 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 September 28, 2013, as stated in its report included herein on page 42.

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 the Company's disclosure controls and procedures and internal control over financial reporting are effective at the reasonable assurance level.

ITEM 9B. OTHER INFORMATION

None.

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PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

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 2014 Annual Meeting of Shareholders (“2014 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.

ITEM 11. EXECUTIVE COMPENSATION

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 2014 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 2014 Proxy Statement.

Equity Compensation Plan Information

The following table gives aggregate information regarding grants under all Plexus equity compensation plans through September 28, 2013:

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 (2)		Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in 1stcolumn)
Equity compensation plans approved by securityholders	3,718,971	$	29.27	2,097,007
Equity compensation plans not approved by securityholders	—	n/a		—
Total	3,718,971	$	29.27	2,097,007

(1) Represents options, stock-settled stock appreciation rights (“SARs”) and restricted stock units ("RSUs"), and unrestricted stock awards ("SAs") granted under the Plexus Corp. 2008 Long-Term Incentive Plan, or its predecessors, the 2005 Equity Incentive Plan, the 1998 Stock Option Plan and the 1995 Directors’ Stock Option Plan, all of which were approved by shareholders. No further awards may be made under the predecessor plans.

(2) The weighted average exercise prices excludes RSUs.

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

Incorporated herein by reference to “Corporate Governance – Director Independence” and “Certain Transactions” in the 2014 Proxy Statement.

ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES

Incorporated herein by reference to the subheading “Auditors - Fees and Services” in the 2014 Proxy Statement.

39

PART IV

ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES

(a)	Documents filed
	Financial Statements and Financial Statement Schedule. See the following list of Financial Statements and Financial Statement Schedule on page 41.
(b)	Exhibits. See Exhibit Index included as the last page of this report, which index is incorporated herein by reference.

40

PLEXUS CORP.

List of Financial Statements and Financial Statement Schedule

September 28, 2013

Contents	Pages
Report of Independent Registered Public Accounting Firm	42
Consolidated Financial Statements:
Consolidated Statements of Comprehensive Income for the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011	43
Consolidated Balance Sheets as of September 28, 2013 and September 29, 2012	44
Consolidated Statements of Shareholders’ Equity for the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011	45
Consolidated Statements of Cash Flows for the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011	46
Notes to Consolidated Financial Statements	47
Financial Statement Schedule:
Schedule II - Valuation and Qualifying Accounts for the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011	68

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.

41

Report of Independent Registered Public Accounting Firm

To the Shareholders

and Board of Directors

of Plexus Corp.:

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 September 28, 2013 and September 29, 2012, and the results of their operations and their cash flows for each of the three years in the period ended September 28, 2013 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 September 28, 2013, based on criteria established in Internal Control - Integrated Framework (1992) 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.

/s/ PricewaterhouseCoopers LLP

Milwaukee, Wisconsin

November 22, 2013

42

PLEXUS CORP. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

for the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011

(in thousands, except per share data)

	2013			2012			2011
Net sales	$	2,228,031		$	2,306,732		$	2,231,232
Cost of sales	2,014,846			2,086,819			2,016,490
Gross profit	213,185			219,913			214,742
Selling and administrative expenses	116,562			115,754			113,563
Operating income	96,623			104,159			101,179
Other income (expense):
Interest expense	(12,638		)	(16,064		)	(11,649		)
Interest income	1,640			1,761			1,367
Miscellaneous	(642		)	1,375			1,206
Income before income taxes	84,983			91,231			92,103
Income tax expense	2,724			29,142			2,847
Net income	$	82,259		$	62,089		$	89,256
Earnings per share:
Basic	$	2.40		$	1.78		$	2.34
Diluted	$	2.36		$	1.75		$	2.30
Weighted average shares outstanding:
Basic	34,330			34,874			38,063
Diluted	34,892			35,529			38,800
Comprehensive income:
Net income	$	82,259		$	62,089		$	89,256
Other comprehensive income:
Derivative instrument fair market value adjustment - net of
income tax	(2,701		)	6,821			(407		)
Foreign currency translation adjustments	6,754			1,234			1,671
Other comprehensive income	4,053			8,055			1,264
Total comprehensive income	$	86,312		$	70,144		$	90,520

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

43

PLEXUS CORP. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS

as of September 28, 2013 and September 29, 2012

(in thousands, except per share data)

	2013			2012
ASSETS
Current assets:
Cash and cash equivalents	$	341,865		$	297,619
Accounts receivable, net of allowances of $1,008 and $1,011, respectively	305,350			323,210
Inventories	404,020			457,691
Deferred income taxes	3,917			5,500
Prepaid expenses and other	23,870			15,785
Total current assets	1,079,022			1,099,805
Property, plant and equipment, net	325,061			265,191
Deferred income taxes	2,510			4,335
Other	41,091			42,136
Total assets	$	1,447,684		$	1,411,467
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Current portion of long-term debt and capital lease obligations	$	3,574		$	10,211
Accounts payable	313,404			341,276
Customer deposits	69,295			36,384
Accrued liabilities:
Salaries and wages	42,553			45,450
Other	42,550			46,550
Total current liabilities	471,376			479,871
Long-term debt and capital lease obligations, net of current portion	257,773			260,211
Deferred income taxes	2,128			3,268
Other liabilities	17,106			19,095
Total non-current liabilities	277,007			282,574
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, 49,176 and 48,851 shares issued, respectively, and 33,600 and 35,097 shares outstanding, respectively	492			489
Additional paid-in capital	449,368			435,546
Common stock held in treasury, at cost, 15,576 and 13,754 shares, respectively	(449,968		)	(400,110		)
Retained earnings	679,172			596,913
Accumulated other comprehensive income	20,237			16,184
Total shareholders’ equity	699,301			649,022
Total liabilities and shareholders’ equity	$	1,447,684		$	1,411,467

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

44

PLEXUS CORP. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

for the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011

(in thousands)

	Common Stock											Accumulated Other
	Shares		Amount		Additional Paid-In Capital		Treasury Stock			Retained Earnings		Comprehensive Income		Total
Balances, October 2, 2010	40,403		$	478	$	399,054	$	(200,110	)	$	445,568	$	6,865	$	651,855
Net income	—		—		—		—			89,256		—		89,256
Other comprehensive income	—		—		—		—			—		1,264		1,264
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
Net income	—		—		—		—			62,089		—		62,089
Other comprehensive income	—		—		—		—			—		8,055		8,055
Treasury shares purchased	—		—		—		—			—		—		—
Stock-based compensation expense	—		—		12,535		—			—		—		12,535
Exercise of stock options, including tax benefits	553		6		7,455		—			—		—		7,461
Balances, September 29, 2012	35,097		489		435,546		(400,110		)	596,913		16,184		649,022
Net income	—		—		—		—			82,259		—		82,259
Other comprehensive income	—		—		—		—			—		4,053		4,053
Treasury shares purchased	(1,822	)	—		—		(49,858		)	—		—		(49,858		)
Stock-based compensation expense	—		—		11,782		—			—		—		11,782
Exercise of stock options, including tax benefits	325		3		2,040		—			—		—		2,043
Balances, September 28, 2013	33,600		$	492	$	449,368	$	(449,968	)	$	679,172	$	20,237	$	699,301

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

45

PLEXUS CORP. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS

for the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011

(in thousands)

	2013			2012			2011
Cash flows from operating activities
Net income	$	82,259		$	62,089		$	89,256
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation	47,410			47,918			46,634
Amortization of intangibles	2,066			1,296			—
Loss (gain) on sale of property, plant and equipment	104			(1,353		)	(175		)
Deferred income taxes	(1,773		)	23,758			(3,028		)
Stock-based compensation expense	11,782			12,535			11,041
Changes in operating assets and liabilities, excluding effects of acquisitions:
Accounts receivable	19,657			(38,577		)	28,551
Inventories	55,193			24,105			38,152
Prepaid expenses and other	(8,888		)	(9,784		)	322
Accounts payable	(28,490		)	34,314			(60,705		)
Customer deposits	32,712			5,485			3,332
Accrued liabilities and other	(4,385		)	(4,283		)	5,071
Cash flows provided by operating activities	207,647			157,503			158,451
Cash flows from investing activities
Payments for property, plant and equipment	(108,122		)	(63,697		)	(70,819		)
Proceeds from sales of property, plant and equipment	873			3,670			2,145
Sale of long-term investments	—			2,000			—
Payments for business acquisition, net of cash acquired	—			(34,155		)	—
Cash flows used in investing activities	(107,249		)	(92,182		)	(68,674		)
Cash flows from financing activities
Proceeds from debt issuance, net of deferred finance costs	30,000			89,082			175,000
Payments on debt and capital lease obligations	(41,018		)	(107,354		)	(17,420		)
Repurchases of common stock	(49,858		)	—			(200,000		)
Proceeds from exercise of stock options	3,778			6,820			6,000
Minimum tax withholding related to vesting of restricted stock	(350		)	(1,373		)	(534		)
Income tax benefit of stock option exercises	—			2,014			—
Cash flows used in financing activities	(57,448		)	(10,811		)	(36,954		)
Effect of exchange rate changes on cash and cash equivalents	1,296			1,002			1,040
Net increase in cash and cash equivalents	44,246			55,512			53,863
Cash and cash equivalents:
Beginning of period	297,619			242,107			188,244
End of period	$	341,865		$	297,619		$	242,107

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

46

Plexus Corp.

Notes to Consolidated Financial Statements

1.    Description of Business and Significant Accounting Policies

Description of Business:  Plexus Corp. and its subsidiaries (together “Plexus” or the “Company”) participate in the Electronic Manufacturing Services (“EMS”) industry. Plexus delivers 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"), Europe, Middle East, and Africa ("EMEA"), and Asia-Pacific ("APAC") regions. Customer service is provided to over 140 branded product companies in the Networking/Communications, Healthcare/Life Sciences, Industrial/Commercial and Defense/Security/Aerospace market sectors. The Company's 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 the Company's customers’ products require complex configuration management and direct order fulfillment to their customers across the globe. In such cases Plexus provides global logistics management and after-market service and repair. The Company's customers’ products may have stringent requirements for quality, reliability and regulatory compliance. Plexus offers its 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. The accounting years for fiscal 2013, 2012 and 2011 each included 364 days.

The Company’s reportable segments consist of the AMER, APAC and EMEA segments. Refer to Note 12, "Reportable Segments, Geographic Information and Major Customers," for further details on reportable segments.

Cash and Cash Equivalents:  Cash equivalents are highly liquid investments purchased with an original maturity of less than three months and are classified as Level 1 in the fair level hierarchy described below. As of September 28, 2013 and September 29, 2012, cash and cash equivalents were the following (in thousands):

	2013		2012
Cash	$	157,988	$	124,648
Money market funds and other	183,877		172,971
	$	341,865	$	297,619

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.

47

Plexus Corp.

Notes to Consolidated Financial Statements

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:

Buildings and improvements	15-50 years
Machinery and equipment	3-10 years
Computer hardware and software	3-10 years

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 4, "Property, Plant and Equipment") 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. This includes costs of both the software and the 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.

Expenditures for maintenance and repairs are expensed as incurred.

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 and intangible assets with finite lives 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 for each of fiscal 2013, 2012 and 2011.

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 7, "Income Taxes"). Realization of deferred income tax assets in each of the Company's tax jurisdictions is dependent on the Company’s ability to generate future taxable income in these jurisdictions. 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:  The Company translates 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. The Company translates 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

48

Plexus Corp.

Notes to Consolidated Financial Statements

the entity involved and remeasurement adjustments for foreign operations where the U.S. dollar is the functional currency are included in our Consolidated Statements of Comprehensive Income as a component of miscellaneous income (expense). Exchange (losses) gains on foreign currency transactions were $(1.2) million, $0.2 million, and $1.0 million for fiscal 2013, 2012 and 2011, respectively.

Derivatives:  All derivatives are recognized on the balance sheet at their fair market value. The Company periodically enters into forward currency exchange contracts and interest rate swaps. 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. The Company's interest rate swaps and certain forward currency exchange contracts are treated as cash flow hedges and, therefore, $(2.7) million, $6.8 million and $(0.4) million were recorded in “Accumulated other comprehensive income” for fiscal 2013, 2012 and 2011, respectively.

Grants from Government Authorities: Grants from governments are recognized at their fair value where there is reasonable assurance that the grant funds will be received and the Company will comply with all attached conditions to the grant.

Government grants relating to property, plant and equipment are recorded as an offset to the carrying value of the related assets at the time of capitalization. Government grants relating to other costs incurred are recognized as an offset to those related costs, for which the grants are intended to compensate for, at the time they are recognized.

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 Comprehensive Income 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 September 28, 2013 and September 29, 2012 (in thousands):

	2013		2012
Foreign currency translation adjustments	$	19,448	$	12,694
Cumulative change in fair market value of derivative instruments, net of tax	789		3,490
Accumulated other comprehensive income	$	20,237	$	16,184

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 6, "Derivatives and Fair Value Measurements."

Conditional Asset Retirement Obligations:  The Company recognizes 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 ("GAAP") 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 $12.2 million and $13.7 million as of September 28, 2013 and September 29, 2012, respectively. The fair value

49

Plexus Corp.

Notes to Consolidated Financial Statements

of the Company’s long-term debt was $246.8 million and $256.8 million as of September 28, 2013 and September 29, 2012, respectively. The Company uses quoted market prices when available or discounted cash flows to calculate fair value. If measured at fair value in the financial statements, long-term debt and capital lease obligations (including the current portion) would be classified as Level 2 in the fair value hierarchy described below. The fair values of the Company’s derivatives are disclosed in Note 6, "Derivatives and Fair Value Measurements."

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 12, "Reportable Segments, Geographic Information and Major Customers." The Company, at times, requires advanced cash deposits for services performed. The Company also closely monitors extensions of credit.

New Accounting Pronouncements:  In July 2013, the Financial Accounting Standards Board (“FASB”) issued new guidance for unrecognized tax benefits that exist along with a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The guidance requires an entity to present an unrecognized tax benefit as a reduction of a deferred tax asset for an net operating loss ("NOL") carryforward, or similar tax loss or tax credit carryforward, rather than as a liability when (1) the uncertain tax position would reduce the NOL or other carryforward under the tax law of the applicable jurisdiction and (2) the entity intends to use the deferred tax asset for that purpose. This guidance is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. Early adoption and retrospective application are permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

In July 2013, the FASB issued amended guidance that permits the Fed Funds Effective Swap Rate ("OIS") to be used as a U.S. benchmark interest rate for hedge accounting purposes, in addition to Treasury obligations of the U.S. government ("UST") and the London Interbank Offered Rate ("LIBOR"). The amendments also remove the restriction on using different benchmark rates for similar hedges. This update is effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements or results of operations.

In March 2013, the FASB issued amended guidance for cumulative translation adjustments upon derecognition of certain subsidiaries or groups of assets within a foreign entity or of an investment in a foreign entity. These amendments provide guidance on releasing cumulative translation adjustments when a reporting entity ceases to have a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity.  In addition, these amendments provide guidance on the release of cumulative translation adjustment in partial sales of equity method investments and in step acquisitions.  The amendments are effective on a prospective basis for fiscal years and interim reporting periods within those years, beginning after December 15, 2013. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

In February 2013, the FASB issued guidance that requires entities to present the changes in the components of accumulated other comprehensive income. Entities are required to present separately the amount of the change that is due to reclassifications, and the amount that is due to current period other comprehensive income. These changes may be shown before or net of tax, and displayed either on the face of the financial statements or in the footnotes. Public entities are required to comply with the standard for annual and interim periods starting with the first interim period in the fiscal period beginning

50

Plexus Corp.

Notes to Consolidated Financial Statements

after December 15, 2012. The Company adopted this guidance as of the second fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.

In January 2013, the FASB issued a clarification of its previous amendment to disclosures about offsetting assets and liabilities. The clarification stated which instruments and transactions are subject to the original amendment requiring an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effects of those arrangements on its financial position. Public entities are required to apply the amendment for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by those amendments retrospectively for all comparative periods presented. This guidance will be effective for the Company's 2014 fiscal year and is not expected to have an impact on the Company's consolidated financial position, results of operations or cash flows, as the guidance only relates to the presentation of the Company's financial statement disclosures.

In June 2011, the FASB issued an amendment to comprehensive income guidance, which eliminates the option to present other comprehensive income 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. This guidance is effective for financial statements issued for fiscal years, and interim periods within those years, beginning after December 15, 2011. The Company adopted this guidance as of the first fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.

Reclassifications: Long-term deferred income tax liabilities in fiscal 2012, in the amount of $3.3 million, were reclassified from short-term deferred income tax assets to conform to current year presentation on the Consolidated Balance Sheets.

2.    Business Combination

In January 2012, Plexus and Kontron AG (“Kontron”) entered into a strategic manufacturing arrangement, and completed the related asset purchase transaction described below. Under this arrangement, Kontron transitioned all manufacturing of its Kontron Design Manufacturing Services (M) Sdn. Bhd. subsidiary (“KDMS”) located in Penang, Malaysia to Plexus facilities in Penang. Plexus acquired the inventory and equipment of KDMS for an adjusted purchase price of $34.2 million, reflecting certain post-closing adjustments, which was paid with cash on-hand, and hired substantially all of KDMS's employees. No real estate was included in this transaction. This transaction was accounted for as a business combination. The purchase price was allocated primarily to inventory and equipment. An identifiable intangible asset of $4.0 million related to a customer relationship was recorded within other non-current assets in the Company's accompanying Consolidated Balance Sheets as a result of the arrangement and is being amortized on a straight-line basis over a two year period. Assuming this transaction had been made at the beginning of any period presented, the consolidated pro forma results would not have been materially different from reported results.

3.    Inventories

Inventories as of September 28, 2013 and September 29, 2012 consisted of (in thousands):

	2013		2012
Raw materials	$	288,559	$	337,657
Work-in-process	57,883		47,182
Finished goods	57,578		72,852
	$	404,020	$	457,691

Per contractual terms, customer deposits are received by the Company to offset obsolete and excess inventory risks. The total amount of customer deposits related to inventory and included within current liabilities on the accompanying Consolidated Balance Sheets as of September 28, 2013 and September 29, 2012 was $51.6 million and $34.8 million, respectively. Approximately $11.0 million of the inventory customer deposit balance as of September 28, 2013 relates to Juniper Networks, Inc. ("Juniper"), which disengaged from the Company in fiscal 2013.

4.    Property, Plant and Equipment

Property, plant and equipment as of September 28, 2013 and September 29, 2012 consisted of (in thousands):

51

Plexus Corp.

Notes to Consolidated Financial Statements

	2013		2012
Land, buildings and improvements	$	212,195	$	170,557
Machinery and equipment	312,941		295,548
Computer hardware and software	91,565		85,433
Construction in progress	67,518		39,894
	684,219		591,432
Less: accumulated depreciation	359,158		326,241
	$	325,061	$	265,191

The major component of the construction in progress balance is related to the footprint expansion in Neenah, Wisconsin.

Assets held under capital leases and included in property, plant and equipment as of September 28, 2013 and September 29, 2012 consisted of (in thousands):

	2013		2012
Buildings and improvements	$	23,147	$	23,009
Machinery and equipment	3,294		1,873
	26,441		24,882
Less: accumulated amortization	16,513		13,909
	$	9,928	$	10,973

The building and improvements category in the above table includes a leased manufacturing facility in San Diego, California, which 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 $6.5 million as of September 28, 2013.

Amortization of assets held under capital leases totaled $0.6 million, $0.8 million, and $0.9 million for fiscal 2013, 2012 and 2011, respectively. There was $1.4 million of capital lease additions for fiscal 2013 and $0.1 million for fiscal 2012. There were no such additions for fiscal 2011.

As of September 28, 2013, September 29, 2012 and October 1, 2011, accounts payable included approximately $10.9 million, $11.5 million and $12.3 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.

5.Debt, Capital Lease Obligations and Other Financing

Debt and capital lease obligations as of September 28, 2013 and September 29, 2012, consisted of (in thousands):

	2013			2012
Debt:
Borrowings under term loan, expiring on May 15, 2017, interest rate of LIBOR plus 1.13%. See also Note 6, "Derivatives and Fair Value Measurements."	$	75,000		$	82,500
Borrowings under senior notes, expiring on June 15, 2018, interest rate of 5.20%. See also Note 6, "Derivatives and Fair Value Measurements."	175,000			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 rate of 9.3% for fiscal 2013 and 10.3% for fiscal 2012, respectively.	11,347			12,922
Less: current portion	(3,574		)	(10,211		)
Long-term debt and capital lease obligations, net of current portion	$	257,773		$	260,211

The aggregate scheduled maturities of the Company’s debt obligations as of September 28, 2013, are as follows (in thousands):

52

Plexus Corp.

Notes to Consolidated Financial Statements

2014	$	—
2015	—
2016	—
2017	75,000
2018	175,000
Thereafter	—
Total	$	250,000

The aggregate scheduled maturities of the Company’s obligations under capital leases as of September 28, 2013, are as follows (in thousands):

2014	$	4,550
2015	4,595
2016	3,197
2017	689
2018	—
Thereafter	—
	13,031
Less: interest portion of capital leases	(1,684		)
Total	$	11,347

On May 15, 2012, the Company entered into a five-year, $250 million senior unsecured credit facility that terminates on May 15, 2017 (the “Credit Facility”). The Credit Facility includes a $160 million revolving credit facility and a $90 million term loan. The revolving credit facility may be increased by $100 million (the "increase option") to $260 million generally by mutual agreement of the Company, the lenders, the letter of credit issuers and the administrative agent named in the related credit agreement (the "Credit Agreement"), subject to certain customary conditions. The Credit Facility was used to refinance the Company's then-existing $100 million senior unsecured revolving credit facility (no amounts were outstanding at that time) and its $150 million senior unsecured term loan (balance of $90.0 million as of May 15, 2012), and for general corporate purposes. Quarterly principal repayments of the Credit Facility term loan of $3.75 million per quarter began June 29, 2012 and ended on March 28, 2013. The final $75.0 million payment is due on May 15, 2017. The Company had term loan borrowings outstanding under the Credit Facility of $75.0 million and $82.5 million as of September 28, 2013 and September 29, 2012, respectively. During fiscal 2013, the Company borrowed and repaid $30.0 million under the revolving credit facility. There were no revolving borrowings under the Credit Facility as of September 28, 2013 and September 29, 2012.

The financial covenants (as defined in the Credit Agreement) require that the Company maintain, as of each fiscal quarter end, a maximum total leverage ratio and a minimum interest coverage ratio. As of September 28, 2013, the Company was in compliance with all financial covenants of the Credit Agreement. Borrowings under the Credit Facility, at the Company's option, bear interest at a defined base rate or the LIBOR rate plus, in each case, an applicable margin based upon the Company's leverage ratio as defined in the Credit Agreement. Rates would increase upon negative changes in specified Company financial metrics and would decrease to no less than LIBOR plus 1.0% or base rate plus 0% upon reduction in the current total leverage ratio. As of September 28, 2013, the Company had a borrowing rate of LIBOR plus 1.13%. As of September 28, 2013, all outstanding debt under the Credit Facility is at a fixed interest rate as a result of the interest rate swap contract discussed in Note 6, "Derivatives and Fair Value Measurements." There is no floating rate debt outstanding under the Credit Facility as of September 28, 2013. The Company is also required to pay an annual commitment fee on the unused revolver credit commitment based on the Company's leverage ratio; the fee was 0.2% as of September 28, 2013.

In the second quarter of fiscal 2012, the Company incurred approximately $0.9 million in new debt issuance costs in connection with the new Credit Facility, which are being amortized over the five-year term of the Credit Facility.

The Company also has outstanding 5.20% Senior Notes, due on June 15, 2018 (the “Notes”); $175 million principal of the Notes was outstanding as of both September 28, 2013 and September 29, 2012. At September 28, 2013, the Company was in compliance with all financial covenants relating to the Notes, which are consistent with those in the Credit Agreement discussed above.

53

Plexus Corp.

Notes to Consolidated Financial Statements

Cash paid for interest in fiscal 2013, 2012 and 2011 was $12.9 million, $16.4 million and $8.6 million, respectively.

6.    Derivatives and Fair Value Measurements

All derivatives are recognized in the accompanying Consolidated Balance Sheets at their estimated fair values. The Company currently has cash flow hedges related to variable rate debt and forecasted foreign currency payments. The Company also enters into forward currency exchange contracts from time to time to manage foreign currency exchange rate exposures associated with certain foreign currency denominated assets and liabilities. 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. There were no forward currency exchange contracts outstanding related to foreign currency denominated assets and liabilities at September 28, 2013.

The Company enters into forward currency exchange contracts on a rolling basis. These contracts had a total notional value of $71.0 million as of September 28, 2013. These forward currency contracts fix the exchange rates for the settlement of future foreign currency obligations that have yet to be realized. The total fair value of the forward currency exchange contracts was a $1.0 million liability as of September 28, 2013, and a $1.1 million asset as of September 29, 2012.

On June 4, 2013, the Company entered into an interest rate swap contract to replace the three interest rate swap contracts that matured on April 4, 2013, as described below. The new interest rate swap contract is related to the $75.0 million term loan under the Company's Credit Facility. This interest rate swap pays the Company variable interest at the one month LIBOR rate, and the Company pays the counterparty a fixed interest rate. The fixed interest rate for the contract is 0.875%. Based on the terms of the interest rate swap contract and the underlying debt, the interest rate contract was determined to be effective, and thus qualifies as a cash flow hedge. As such, any changes in the fair value of the interest rate swap are recorded in "Accumulated other comprehensive income" on the accompanying Condensed Consolidated Balance Sheets until earnings are affected by the variability of cash flows. The total fair value of the interest rate swap contract was a $0.03 million asset as of September 28, 2013. As of September 28, 2013, the notional amount of the Company's interest rate swap was $75.0 million.

The Company entered into three interest rate swap contracts related to the term loans under its prior credit facility that had an initial total notional value of $150 million and matured on April 4, 2013, which resulted in a $2.0 million discrete tax benefit in fiscal 2013. The fixed interest rates for each of these contracts were 4.415%, 4.490% and 4.435%, respectively. These interest rate swap contracts were originally entered into to convert $150 million of the variable rate term loan under the prior 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 qualified as a cash flow hedge. As such, any changes in the fair value of these interest rate swaps were recorded in “Accumulated other comprehensive income” on the accompanying Condensed Consolidated Balance Sheets until earnings were affected by the variability of cash flows. The total fair value of these interest rate swap contracts was a $1.7 million liability as of September 29, 2012.

The tables below present information regarding the fair values of derivative instruments (as defined in Note 1, "Description of Business and Significant Accounting Policies") and the effects of derivative instruments on the Company’s Consolidated Financial Statements:

Fair Values of Derivative Instruments
In thousands of dollars
	Asset Derivatives			Liability Derivatives
		September 28, 2013	September 29, 2012		September 28, 2013	September 29, 2012
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value	Fair Value	Balance Sheet Location	Fair Value	Fair Value
Interest rate swaps	Prepaid expenses and other	$34	$—	Current liabilities – Other	$—	$1,715
Forward contracts	Prepaid expenses and other	$—	$1,095	Current liabilities – Other	$999	$—

54

Plexus Corp.

Notes to Consolidated Financial Statements

The Effect of Derivative Instruments on the Statements of Comprehensive Income 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)
	September 28, 2013	September 29, 2012		September 28, 2013	September 29, 2012		September 28, 2013	September 29, 2012
Interest rate swaps	$961	$(40)	Interest income (expense)	$(788)	$(3,564)	Other income (expense)	$—	$—
Forward contracts	$(1,389)	$3,021	Selling and administrative expenses	$709	$(597)	Other income (expense)	$—	$—
Treasury Rate Locks	$—	$—	Interest income (expense)	$321	$320	Other income (expense)	$—	$—
Income Tax (Benefit) Expense	$—	$—	Income Tax (Benefit) Expense	$2,031	$—	Income Tax (Benefit) Expense	$—	$—

55

Plexus Corp.

Notes to Consolidated Financial Statements

The following table lists the fair values of assets/(liabilities) of the Company’s derivatives as of September 28, 2013, by input level as defined in Note 1, "Description of Business and Significant Accounting Policies":

	Fair Value Measurements Using Input Levels Asset/ (Liability) (in thousands):
Fiscal year ended September 28, 2013	Level 1	Level 2	Level 3	Total
Derivatives
Interest rate swaps	$—	$34	$—	$34
Forward currency forward contracts	$—	$(999)	$—	$(999)
Fiscal year ended September 29, 2012
Derivatives
Interest rate swaps	$—	$(1,715)	$—	$(1,715)
Forward currency forward contracts	$—	$1,095	$—	$1,095

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.

7.    Income Taxes

The domestic and foreign components of income (loss) before income taxes for fiscal 2013, 2012 and 2011 consisted of (in thousands):

	2013			2012		2011
U.S.	$	(8,406	)	$	8,371	$	(9,449	)
Foreign	93,389			82,860		101,552
	$	84,983		$	91,231	$	92,103

Income tax expense (benefit) for fiscal 2013, 2012 and 2011 consisted of (in thousands):

	2013			2012		2011
Current:
Federal	$	408		$	—	$	—
State	—			131		3
Foreign	4,089			5,253		5,872
	4,497			5,384		5,875
Deferred:
Federal	(3,702		)	18,950		(1,649		)
State	(42		)	4,784		(484		)
Foreign	1,971			24		(895		)
	(1,773		)	23,758		(3,028		)
	$	2,724		$	29,142	$	2,847

56

Plexus Corp.

Notes to Consolidated Financial Statements

The following is a reconciliation of the federal statutory income tax rate to the effective income tax rates reflected in the Consolidated Statements of Comprehensive Income for fiscal 2013, 2012 and 2011:

	2013		2012		2011
Federal statutory income tax rate	35.0	%	35.0	%	35.0	%
Increase (decrease) resulting from:
Permanent differences	—		—		—
State income taxes, net of federal income tax	—		0.2		(0.3	)
Foreign tax rate differences	(34.4	)	(27.5	)	(34.5	)
Valuation reserve for deferred tax assets	5.8		26.5		1.4
Other, net	(3.2	)	(2.3	)	1.5
Effective income tax rate	3.2	%	31.9	%	3.1	%

The Company recorded income tax expense of $2.7 million, $29.1 million and $2.8 million for fiscal 2013, 2012 and 2011, respectively.

The effective tax rate for fiscal 2013 was significantly lower than that of fiscal 2012 but comparable to the fiscal 2011 rate. The increase to the income tax expense recorded in fiscal 2012 as compared to the other periods presented was the result of the Company recording an additional valuation allowance against the U.S. deferred tax assets in fiscal 2012. During the preparation of the fiscal 2012 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 U.S. deferred tax assets, consistent with the provisions of ASC Topic 740, “Income Taxes.” Accordingly, the Company, based on the weight of the available positive and negative evidence, established an additional valuation allowance against the U.S. deferred tax assets, impacting the tax provision by $22.8 million. The total valuation allowance impacting the tax provision for fiscal 2012 was $24.1 million, comprised of the $22.8 million valuation allowance for the U.S. and an additional $1.3 million for operating losses in Germany and Romania.

During the fourth quarter of fiscal 2013, the Company identified and recorded a discrete tax adjustment and placed a full valuation allowance on the net deferred tax assets of the Company's U.K. operations, increasing tax expense by $1.8 million ($0.05 per diluted share). The Company's analysis found that in the fourth quarter, its U.K. operations experienced an unanticipated material decline in sales resulting in a loss in fiscal 2013, which is forecasted to continue into fiscal 2014. While the Company's U.K. operations are expected to regain profitability, the current, forecasted and cumulative losses are substantial negative evidence. Having examined the evidence, both positive and negative, it was determined that it is more likely than not that these deferred tax assets will not be utilized and should have a valuation allowance placed against them.

In the fourth quarter of fiscal 2013 the Company identified and recorded several out-of-period tax errors related to prior fiscal periods that reduced tax expense by $3.2 million ($0.09 per diluted share). These out-of-period adjustments are reflected in the Other, net line of the effective income tax rate schedule above. The Company believes these out-of-period tax errors were not material to the fiscal 2013, or previously issued, financial statements.

57

Plexus Corp.

Notes to Consolidated Financial Statements

The components of the net deferred income tax asset as of September 28, 2013 and September 29, 2012, consisted of (in thousands):

	2013			2012
Deferred income tax assets:
Loss/credit carryforwards	$	12,985		$	12,175
Goodwill	1,268			2,024
Inventories	4,997			4,870
Accrued benefits	19,428			17,768
Allowance for bad debts	339			322
Interest rate swaps	—			664
Other	3,304			4,735
Total gross deferred income tax assets	42,321			42,558
Less valuation allowance	(34,075		)	(27,087		)
Deferred income tax assets	8,246			15,471
Deferred income tax liabilities:
Property, plant and equipment	3,934			7,404
Other	13			1,500
Deferred income tax liabilities	3,947			8,904
Net deferred income tax asset	$	4,299		$	6,567

During fiscal 2013, the Company’s valuation allowance increased by $7.0 million as a result of increases to the valuation allowance against the net deferred tax assets in the U.S. of $2.4 million, the net deferred tax assets in the U.K. of $2.4 million, the net deferred tax assets in Romania of $0.9 million, the net deferred tax assets in Germany of $1.0 million and the net deferred tax assets in China of $0.3 million.

As of September 28, 2013, the Company had approximately $81.6 million of state net operating loss carryforward that expires between fiscal 2014 and 2032, which also has a full valuation allowance against it.

As a result of using the with-and-without method under the requirements for accounting for stock-based compensation, the Company has unrecognized net operating loss carryforward of $2.6 million related to tax deductions in excess of compensation expense for stock options until such time as the related deductions actually reduce income taxes payable.

Cash paid for income taxes in fiscal 2013 and 2012 was $5.3 million and $9.0 million, respectively. Cash refunded for income taxes in fiscal 2011 was $2.2 million.

During the fiscal year ended September 28, 2013, tax legislation was adopted in various jurisdictions. None of these changes are expected to have a material impact on the Company's consolidated financial condition, results of operations or cash flows.

The Company has been granted tax holidays for its Malaysian and Xiamen, China subsidiaries. These tax holidays expire in fiscal 2024 and 2014, respectively, and are subject to certain conditions with which the Company expects to comply. In fiscal 2013, 2012 and 2011, these subsidiaries generated income, which resulted in tax reductions of approximately $22.7 million ($0.66 per basic share), $17.5 million ($0.50 per basic share) and $21.7 million ($0.57 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 permanently reinvested. The aggregate undistributed earnings of the Company’s foreign subsidiaries for which a deferred income tax liability has not been recorded was approximately $567.3 million as of September 28, 2013. If such earnings were repatriated, additional tax expense may result, although the calculation of such additional taxes is not practicable at this time.

58

Plexus Corp.

Notes to Consolidated Financial Statements

The Company has approximately $7.4 million of uncertain tax benefits as of September 28, 2013. 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):

Balance at beginning of fiscal 2012	$	7,360
Gross increases for tax positions of prior years	243
Gross increases for tax positions of the current year	—
Gross decreases for tax positions of prior years	—
Settlements	—
Balance at beginning of fiscal 2013	$	7,603
Gross increases for tax positions of prior years	189
Gross increases for tax positions of the current year	—
Gross decreases for tax positions of prior years	356
Settlements	—
Balance at September 28, 2013	$	7,436

Approximately $5.3 million and $6.5 million of the balance as of September 28, 2013 and September 29, 2012, respectively, 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 $1.1 million, $0.9 million and $0.7 million as of September 28, 2013, September 29, 2012 and October 1, 2011, respectively. The Company recognized $0.2 million of expense for accrued penalties and net accrued interest in the Consolidated Statements of Comprehensive Income for the fiscal year ended September 28, 2013.

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 is currently under examination by taxing authorities in the U.S. for fiscal years 2008 through 2010. The U.S. examination may be resolved within the next twelve months, but at this time it is not possible to estimate the amount of the effects of any changes to the Company's previously recorded uncertain tax positions. Periodically, the Company's foreign operations are notified by local taxing authorities of an examination of current or prior period tax related filings. The Company is not aware of any material proposed adjustment that has not been reflected in the current financial statements.

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:

Jurisdiction	Fiscal Years
China	2008-2013
Germany	2009-2013
Mexico	2006-2013
Romania	2009-2013
United Kingdom	2007-2013
United States
Federal	2007-2013
State	2001-2013

8.    Earnings Per Share

59

Plexus Corp.

Notes to Consolidated Financial Statements

The following is a reconciliation of the amounts utilized in the computation of basic and diluted earnings per share for fiscal 2013, 2012 and 2011 (in thousands, except per share amounts):

	2013		2012		2011
Earnings:
Net income	$	82,259	$	62,089	$	89,256
Basic weighted average common shares outstanding	34,330		34,874		38,063
Dilutive effect of share-based awards outstanding	562		655		737
Diluted weighted average shares outstanding	34,892		35,529		38,800
Earnings per share:
Basic	$	2.40	$	1.78	$	2.34
Diluted	$	2.36	$	1.75	$	2.30

In fiscal 2013, 2012 and 2011, stock options and stock-settled stock appreciation rights (‘SARs”) to purchase approximately 1.9 million, 1.4 million and 1.3 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 the Company's common shares and, therefore, their effect would be antidilutive.

Outstanding shares have decreased in recent years as a result of the Company's stock repurchase programs. Refer to Note 14, "Shareholders' Equity" for further information on the Company's stock repurchase programs.

9.    Operating Lease Commitments

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 2013, 2012 and 2011 was approximately $15.7 million, $14.2 million and $12.8 million, respectively. Renewal and purchase options are available on certain of these leases.

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

2014	$	12,689
2015	8,554
2016	6,017
2017	3,663
2018	2,942
Thereafter	12,107
	$	45,972

10.    Benefit Plans

401(k) Savings Plan: The Company’s 401(k) Retirement Plan covers all eligible U.S. employees. The Company matches employee contributions up to 4 percent of eligible earnings. The Company’s contributions for fiscal 2013, 2012 and 2011 totaled $6.6 million, $6.9 million and $5.8 million, respectively.

Stock-based Compensation Plans: 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 granted to executive officers, other officers and key employees 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. In fiscal 2013, the Committee began granting RSUs to non-employee directors; these RSUs generally fully vest on the first anniversary of the grant date, which is also the date as of which the underlying shares will be issued (unless further deferred).

The 2008 Plan replaced the shareholder-approved 2005 Equity Incentive Plan (the “2005 Plan”). The 2005 Plan terminated upon the approval of the 2008 Plan, except that outstanding awards continue until exercise, expiration or forfeiture.

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.

Options issued to the members of the Board of Directors in fiscal 2013, 2012 and 2011 vested immediately on the date of grant. SAs issued to members of the Board in fiscal 2012 and 2011 also vested immediately on the date of grant.

In fiscal 2013, under the 2008 Plan, the Company granted options to purchase 0.4 million shares of the Company’s common stock and 0.1 million stock-settled SARs. Additionally, the Committee made awards of RSUs for 0.3 million shares of common stock, and the Committee did not grant SAs for shares of common stock.

In fiscal 2012, under the 2008 Plan, the Company granted options to purchase 0.3 million shares of the Company’s common stock and 0.2 million stock-settled SARs. Additionally, the Committee made awards of RSUs for 0.3 million shares of common stock, and the Committee granted SAs for 6.0 thousand shares of common stock.

In fiscal 2011, under the 2008 Plan, the Company granted options to purchase 0.3 million shares of the Company’s common stock and 0.3 million stock-settled SARs. Additionally, the Committee made awards of RSUs for 0.1 million shares of common stock, and the Committee granted SAs for 10.0 thousand shares of common stock.

The Company recognized $11.8 million, $12.5 million and $11.0 million of compensation expense associated with stock options, SARs, RSUs and SAs for fiscal 2013, 2012 and 2011, respectively. No deferred tax benefits related to equity awards were recognized in fiscal 2013 or 2012. A related deferred tax benefit of $3.7 million was recognized for fiscal 2011.

61

Plexus Corp.

Notes to Consolidated Financial Statements

A summary of the Company’s stock option and SAR activity follows:

	Number of Options/SARs (in thousands)		Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)
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
Granted	518		30.24
Cancelled	(105	)	34.44
Exercised	(561	)	22.36
Outstanding as of September 29, 2012	3,071		$	28.86
Granted	515		27.66
Cancelled	(141	)	25.48
Exercised	(380	)	22.00
Outstanding as of September 28, 2013	3,065		$	29.27	$	25,547

	Number of Options/SARs (in thousands)	Weighted Average Exercise Price		Aggregate Intrinsic Value(in thousands)
Exercisable as of:
October 1, 2011	2,383	$	26.38
September 29, 2012	2,327	$	28.32
September 28, 2013	2,375	$	29.49	$	19,763

Included in the stock option and SAR activity table above are 0.1 million, 0.2 million and 0.3 million SARs, which were granted in fiscal 2013, 2012 and 2011, respectively.

The following table summarizes outstanding stock option and SAR information as of September 28, 2013 (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
$12.94 - $19.41	278	$	14.75	3.0	278	$	14.75
$19.42 - $29.12	1,269	$	25.02	6.2	804	$	24.43
$29.13 - $42.52	1,518	$	35.48	5.3	1,293	$	35.81
$12.94 - $42.52	3,065	$	29.27	5.5	2,375	$	29.49

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 SARs 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 granted for fiscal 2013, 2012 and 2011 were $11.88, $13.13 and $13.40, 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:

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Plexus Corp.

Notes to Consolidated Financial Statements

	2013	2012	2011
Expected life (years)	4.40 - 5.00	4.40 - 5.00	4.40 - 5.00
Risk-free interest rate	0.57 - 2.71%	0.57 - 1.09%	1.03 - 2.17%
Expected volatility	45 - 51%	50 - 51%	49 - 50%
Dividend yield	—	—	—

The fair value of options and SARs vested for fiscal 2013, 2012 and 2011 were $3.3 million, $4.3 million and $3.6 million, respectively.

For fiscal 2013, 2012 and 2011, the total intrinsic value of options and SARs exercised was $4.3 million, $7.6 million and $6.5 million, respectively.

As of September 28, 2013, there was $5.8 million of unrecognized compensation cost related to non-vested options and SARs that is expected to be recognized over a weighted average period of 1.31 years.

A summary of the Company’s RSUs and SAs activity follows:

	Number of Shares (in thousands)		Weighted Average Fair Value at Date of Grant		Aggregate     Intrinsic Value     (in thousands)
Units outstanding as of October 2, 2010	385		$	26.90
Granted	155		27.14
Canceled	(18	)	25.92
Vested	(98	)	31.27
Units outstanding as of October 1, 2011	424		$	26.02
Granted	268		36.68
Canceled	(26	)	33.12
Vested	(200	)	25.98
Units outstanding as of September 29, 2012	466		$	31.78
Granted	329		26.16
Canceled	(47	)	31.26
Vested	(94	)	26.59
Units outstanding as of September 28, 2013	654		$	29.73	$	24,140

The Company uses the fair value at the date of grant to value RSUs and SAs. The fair values of RSUs and SAs that vested for fiscal 2013, 2012 and 2011 were $0.5 million, $1.4 million and $0.6 million, respectively. There were 93,831 RSUs and no SAs that vested during the fiscal year ended September 28, 2013. There were 193,684 RSUs and 6,000 SAs that vested during the fiscal year ended September 29, 2012. There were 88,112 RSUs and 10,000 SAs that vested during the fiscal year ended October 1, 2011.

As of September 28, 2013, there was $10.7 million of unrecognized compensation cost related to RSUs that is expected to be recognized over a weighted average period of 1.82 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 these former executives, or their designated beneficiaries upon such executives’ deaths, certain amounts annually for the first 15 years subsequent to their retirements.

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

63

Plexus Corp.

Notes to Consolidated Financial Statements

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 2013, 2012 and 2011, the Company made contributions to the participants’ SERP accounts in the amount of $0.4 million, $0.4 million and $0.3 million, respectively.

As of September 28, 2013 and September 29, 2012, the SERP assets held in the Trust totaled $9.1 million and $7.7 million, respectively, and the related liability to the participants totaled approximately $5.6 million and $4.8 million as of September 28, 2013 and September 29, 2012, 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.

11.    Litigation

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

12.    Reportable Segments, Geographic Information and Major Customers

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, interest income, other miscellaneous income (expense), 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 for fiscal 2013, 2012 and 2011 were as follows (in thousands):

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Plexus Corp.

Notes to Consolidated Financial Statements

	2013			2012			2011
Net sales:
AMER	$	1,062,758		$	1,255,851		$	1,304,885
APAC	1,146,299			1,110,365			1,063,079
EMEA	122,566			95,360			92,269
Elimination of inter-segment sales	(103,592		)	(154,844		)	(229,001		)
	$	2,228,031		$	2,306,732		$	2,231,232
Depreciation:
AMER	$	13,474		$	14,486		$	15,045
APAC	23,560			23,428			20,723
EMEA	4,644			3,438			2,947
Corporate	5,732			6,566			7,919
	$	47,410		$	47,918		$	46,634
Operating income (loss):
AMER	$	70,863		$	91,087		$	68,725
APAC	116,350			101,903			118,063
EMEA	(3,096		)	(2,325		)	(2,955		)
Corporate and other costs	(87,494		)	(86,506		)	(82,654		)
	$	96,623		$	104,159		$	101,179
Capital expenditures:
AMER	$	60,507		$	11,532		$	12,578
APAC	12,345			39,321			44,890
EMEA	30,836			9,863			10,233
Corporate	4,434			2,981			3,118
	$	108,122		$	63,697		$	70,819
	September 28, 2013			September 29, 2012
Total assets:
AMER	$	423,048		$	403,911
APAC	828,672			771,781
EMEA	111,977			88,420
Corporate	83,987			147,355
	$	1,447,684		$	1,411,467

65

Plexus Corp.

Notes to Consolidated Financial Statements

The following enterprise-wide information is provided in accordance with the required segment disclosures for fiscal 2013, 2012 and 2011. Net sales to unaffiliated customers were based on the Company’s location providing product or services (in thousands):

	2013			2012			2011
Net sales:
United States	$	1,004,153		$	1,156,347		$	1,192,389
Malaysia	877,748			872,733			836,808
China	268,551			237,632			226,271
United Kingdom	81,657			60,313			75,771
Mexico	58,605			99,504			112,496
Romania	38,117			33,835			16,498
Germany	2,792			1,212			—
Elimination of inter-segment sales	(103,592		)	(154,844		)	(229,001		)
	$	2,228,031		$	2,306,732		$	2,231,232
	September 28, 2013			September 29, 2012
Long-lived assets:
United States	$	110,548		$	61,269
Malaysia	83,732			95,907
China	35,230			36,737
United Kingdom	14,645			9,256
Mexico	5,610			7,368
Romania	37,188			13,586
Germany	616			623
Other Foreign	5,463			5,540
Corporate	32,029			34,905
	$	325,061		$	265,191

Due to the Company being a contract manufacturer that produces unique products and services related to each contract, it is impracticable to provide revenue by product/service information.

Long-lived assets as of September 28, 2013 and September 29, 2012 exclude other long-term assets and deferred income tax assets which totaled $43.6 million and $46.5 million, respectively.

The percentages of net sales to customers representing 10 percent or more of total net sales for fiscal 2013, 2012 and 2011 were as follows:

	2013	2012	2011
Juniper Networks, Inc. (“Juniper”)	13%	16%	17%

For our significant customers, we generally manufacture products in more than one location. For example, net sales to Juniper, our largest customer in all periods presented, occurred in the AMER and APAC reportable segments. Production for Juniper concluded at the end of our third fiscal quarter of 2013. However, sales of certain inventory continued into our fourth fiscal quarter of 2013. We do not expect to incur any material adjustments related to this inventory. We expect no further shipments to Juniper in fiscal 2014.

66

Plexus Corp.

Notes to Consolidated Financial Statements

No customer represented 10 percent or more of total accounts receivable as of September 28, 2013 or September 29, 2012.

13.    Guarantees

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 the Company's accompanying 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 2013 and 2012 (in thousands):

Limited warranty liability, as of October 1, 2011	$	5,453
Accruals for warranties issued during the period	649
Settlements (in cash or in kind) during the period	(957		)
Limited warranty liability, as of September 29, 2012	5,145
Accruals for warranties issued during the period	1,168
Settlements (in cash or in kind) during the period	(371		)
Limited warranty liability, as of September 28, 2013	$	5,942

14.    Shareholders' Equity

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 for approximately $200.0 million, at an average price of $31.69 per share. These shares were recorded as treasury stock.

On October 23, 2012, the Board of Directors approved a stock repurchase program under which the Company was authorized to repurchase up to $50 million of its common stock. This program was completed in the fourth quarter of fiscal 2013. During fiscal 2013, the Company repurchased 1,821,698 shares under this program for approximately $49.9 million, at an average price of $27.37 per share. These shares were recorded as treasury stock.

On August 19, 2013, the Board of Directors approved a stock repurchase program under which the Company is authorized to repurchase up to $30 million of its common stock in fiscal 2014. Accordingly, no shares were purchased under this authorization in fiscal 2013.

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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.

15.    Quarterly Financial Data (Unaudited)

Summarized quarterly financial data for fiscal 2013 and 2012 consisted of (in thousands, except per share amounts):

2013	First Quarter		Second Quarter		Third Quarter		Fourth Quarter			Total
Net sales	$	530,532	$	557,824	$	571,945	$	567,730		$	2,228,031
Gross profit	51,162		52,021		55,473		54,529			213,185
Net income	16,616		17,975		23,204		24,464			82,259
Earnings per share (1):
Basic	$	0.48	$	0.52	$	0.69	$	0.73		$	2.40
Diluted	$	0.47	$	0.52	$	0.68	$	0.71	(2)	$	2.36
2012	First Quarter		Second Quarter		Third Quarter		Fourth Quarter			Total
Net sales	$	529,654	$	573,470	$	608,819	$	594,789		$	2,306,732
Gross profit	51,652		54,624		57,393		56,244			219,913
Net income	17,870		19,958		23,533		728		*	62,089
Earnings per share (1):
Basic	$	0.52	$	0.57	$	0.67	$	0.02		$	1.78
Diluted	$	0.51	$	0.56	$	0.66	$	0.02		$	1.75

(1) 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.

(2) Adjusting for fourth quarter discrete tax items, as discussed in Note 7, "Income Taxes," diluted earnings per share for the fourth quarter of 2013 was $0.67.

*See Note 7 in Notes to Consolidated Financial Statements for discussion regarding the fiscal 2012 valuation allowance recorded for deferred tax assets.

Plexus Corp. and Subsidiaries

Schedule II – Valuation and Qualifying Accounts

For the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011 (in thousands):

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Descriptions	Balance at beginning of period		Additions charged to costs and expenses		Additions charged to other accounts		Deductions			Balance at end of period
Fiscal Year 2013:
Allowance for losses on accounts receivable (deducted from the asset to which it relates)	$	1,011	$	1,036	$	—	$	1,039	*	$	1,008
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)	$	27,087	$	6,988	$	—	$	—		$	34,075
Fiscal Year 2012:
Allowance for losses on accounts receivable (deducted from the asset to which it relates)	$	3,256	$	259	$	—	$	2,504	*	$	1,011
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)	$	5,116	$	21,971	$	—	$	—		$	27,087
Fiscal Year 2011:
Allowance for losses on accounts receivable (deducted from the asset to which it relates)	$	1,400	$	1,863	$	—	$	7		$	3,256
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)	$	2,548	$	1,238	$	1,330	$	—		$	5,116
* Amount represents favorable resolution of amounts previously reserved for at the end of the prior year and amounts written off.

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Plexus Corp.

Notes to Consolidated Financial Statements

SIGNATURES

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.

	PLEXUS CORP. (Registrant)
By:	/s/ Dean A. Foate
	Dean A. Foate, Chairman, President and Chief Executive Officer

November 22, 2013

POWER OF ATTORNEY

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.*

SIGNATURE AND TITLE

/s/ Dean A. Foate	/s/ Rainer Jueckstock
Dean A. Foate, Chairman, President and Chief Executive Officer (Principal Executive Officer)	Rainer Jueckstock, Director
/s/ Ginger M. Jones	/s/ Peter Kelly
Ginger M. Jones, Senior Vice President and Chief Financial Officer (Principal Financial Officer and Principal Accounting Officer)	Peter Kelly, Director
/s/ Ralf R. Böer	/s/ Philip R. Martens
Ralf R. Böer, Director	Philip R. Martens, Director
/s/ Stephen P. Cortinovis	/s/ Michael V. Schrock
Stephen P. Cortinovis, Director	Michael V. Schrock, Director
/s/ David J. Drury	/s/ Mary A. Winston
David J. Drury, Director	Mary A. Winston, Director

*Each of the above signatures is affixed as of November 22, 2013.

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EXHIBIT INDEX

PLEXUS CORP.

Form 10-K for Fiscal Year Ended September 28, 2013

Exhibit No.	Exhibit	Incorporated By Reference To	Filed Herewith
3(i)	(a) Restated Articles of Incorporation of Plexus Corp., as amended through August 28, 2008	Exhibit 3(i) to Plexus’ Report on Form 10-Q for the quarter ended March 31, 2004
	(b) Articles of Amendment, dated August 28, 2008, to the Restated Articles of Incorporation	Exhibit 3.1 to Plexus’ Report on Form 8-K dated August 28, 2008
3(ii)	Bylaws of Plexus Corp., adopted February 13, 2008, amended as of September 23, 2010	Exhibit 3.1 to Plexus’ Report on Form 8-K dated September 23, 2010
4.1	Restated Articles of Incorporation of Plexus Corp., as amended through August 28, 2008	Exhibit 3(i) above
4.2	Bylaws of Plexus Corp., adopted February 13, 2008, amended as of September 23, 2010	Exhibit 3(ii) above
4.3	Rights Agreement, dated as of August 28, 2008, between Plexus Corp. and American Stock Transfer & Trust Company, LLC	Exhibit 4.1 to Plexus’ Report on Form 8-A dated August 28, 2008
10.1	Credit Agreement, dated as of May 15, 2012, among Plexus Corp. and the banks, financial institutions and other institutional lenders listed on the signature pages thereof, U.S. Bank National Association, as administrative agent, PNC Bank, National Association, as syndication agent, The Bank of Tokyo-Mitsubishi UFJ, Ltd., HSBC Bank USA, National Association, RBS Citizens, N.A. and Wells Fargo Bank, N.A., as co-documentation agents, and U.S. Bank National Association and PNC Capital Markets LLC, as joint lead arrangers and joint bookrunners (including the related subsidiary guaranty).	Exhibit 10.1 to Plexus’ Report on Form 8-K dated May 15, 2012

71

10.2	Note Purchase Agreement, dated as of April 21, 2011, between Plexus Corp. and the Purchasers named therein relating to $175,000,000 5.20% Senior Notes, due June 15, 2018	Exhibit 10.1 to Plexus’ Report on Form 8-K dated April 21, 2011
10.3	Employment Agreement, dated May 15, 2008, by and between Plexus Corp. and Dean A. Foate*	Exhibit 10.1 to Plexus' Report on Form 8-K dated May 15, 2008
10.4	Form of Change of Control Agreement with each of the executive officers (other than Dean A. Foate)*	Exhibit 10.2 to Plexus’ Report on Form 8-K dated May 15, 2008
10.5	Amended and Restated Plexus Corp. 1998 Option Plan* [superseded]	Exhibit 10.1 to Plexus’ Report on Form 10-Q for the quarter ended January 3, 2009
10.6	(a) Summary of Directors’ Compensation (11/12)*	Exhibit 10.8(a) to Plexus' Report on Form 10-K for the year ended September 29, 2012
	(b) Summary of Directors’ Compensation (11/11)*[superseded]	Exhibit 10.7(a) to Plexus' Report on Form 10-K for the year ended October 1, 2011
	(c) Plexus Corp. 1995 Directors’ Stock Option Plan*[superseded]	Exhibit 10.10 to Plexus’ Report on Form 10-K for the year ended September 30, 1994
10.7	(a) Plexus Corp. Executive Deferred Compensation Plan*	Exhibit 10.17 to Plexus’ Report on Form 10-K for the fiscal year ended September 30, 2000
	(b) Plexus Corp Executive Deferred Compensation Plan Trust dated April 1, 2003 between Plexus Corp. and Bankers Trust Company*	Exhibit 10.14 to Plexus’ Report on Form 10-K for the fiscal year ended September 30, 2003
10.8	Plexus Corp. Non-employee Directors Deferred Compensation Plan*	Exhibit 10.10 to Plexus' Report on Form 10-K for the fiscal year ended September 29, 2012
10.9 (a)	Amended and Restated Plexus Corp. 2008 Long-Term Incentive Plan*	Exhibit 10.11(a) to Plexus' Report on Form 10-K for the fiscal year ended September 29, 2012
10.9(b)	Forms of award agreements thereunder*
	(i) Form of Stock Option Agreement	Exhibit 10.2 to Plexus’ Report on Form 10-Q for the quarter ended January 2, 2010

72

	(ii) Form of Restricted Stock Unit Award	Exhibit 10.5(b) to Plexus’ Report on Form 10-Q for the quarter ended March 29, 2008
	(iii) Form of Stock Appreciation Rights Agreement	Exhibit 10.5(c) to Plexus’ Report on Form 10-Q for the quarter ended March 29, 2008
	(iv) Form of Unrestricted Stock Award	Exhibit 10.3 to Plexus’ Report on Form 10-Q for the quarter ended January 2, 2010
	(v) Form of Plexus Corp. Variable Incentive Compensation Plan — Plexus Leadership Team	Exhibit 10.1 to Plexus’ Report on Form 10-Q for the quarter ended April 2, 2011
	(vi) Form of Restricted Stock Unit Award Agreement for Directors (Form of award agreement consistent with the terms of the 2008 Long-Term Incentive Plan.)		X
	(vii) Form of Performance Stock Unit Agreement (Form of award agreement consistent with the terms of the 2008 Long-Term Incentive Plan.)		X
10.10	Form of Plexus Corp. Long-Term Cash Agreement*	Exhibit 10.1 to Plexus’ Report on Form 10-Q for the quarter ended December 29, 2007
10.11(a)	Amended and Restated Plexus Corp. 2005 Equity Incentive Plan* [superseded]	Exhibit 10.2 to Plexus’ Report on Form 10-Q for the quarter ended January 3, 2009
10.11(b)	Forms of award agreements thereunder* [superseded]
	(i) Form of Option Grant (Officer or Employee)	Exhibit 10.1 to Plexus’ Report on Form 8-K dated April 1, 2005
	(ii) Form of Option Grant (Director)	Exhibit 10.2 to Plexus’ Report on Form 8-K dated November 17, 2005
	(iii) Form of Restricted Stock Unit Award with Time Vesting	Exhibit 10.4 to Plexus’ Report on Form 8-K dated April 1, 2005
	(iv) Form of Stock Appreciation Right Award	Exhibit 10.1 to Plexus’ Report on Form 8-K dated August 29, 2007
10.12	Amendment No. 1 to Standard Design-Build Agreement between Plexus Corp. and Miron Construction Co., Inc., dated July 3, 2012 (together with the underlying agreement).	Exhibit 10.1 to Plexus' Report on Form 8-K dated July 3, 2012
21	List of Subsidiaries		X

73

23	Consent of PricewaterhouseCoopers LLP		X
24	Powers of Attorney	(Signature Page Hereto)
31.1	Certification of Chief Executive Officer pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002.		X

74

31.2	Certification of Chief Financial Officer pursuant to Section 302(a) of the Sarbanes-Oxley Act of 2002.	X
32.1	Certification of the CEO pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	X
32.2	Certification of the CFO pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002	X
99.1	Reconciliation of ROIC to GAAP Financial Statements	X
101	The following materials from Plexus Corp.’s Annual Report on Form 10-K for the fiscal year ended September 28, 2013, formatted in XBRL (Extensible Business Reporting Language): (i) the Consolidated Statements of Comprehensive Income, (ii) the Consolidated Balance Sheets, (iii) the Consolidated Statements of Shareholders’ Equity, (iv) the Consolidated Statements of Cash Flows, and (v) Notes to Consolidated Financial Statements.	X
101.INS	XBRL Instance Document	X
101.SCH	XBRL Taxonomy Extension Schema Document	X
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document	X
101.LAB	XBRL Taxonomy Extension Label Linkbase Document	X
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document	X
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document	X
*	Designates management compensatory plans or agreements.

75

EX-10.9(B)(VI)

Exhibit 10.9(b)(vi)

PLEXUS CORP. 2008 LONG-TERM INCENTIVE PLANRESTRICTED STOCK UNIT AWARD AGREEMENT

TO:        

DATE:        

As a non-employee member of the Board of Directors (the “Board”) of Plexus Corp. (the “Corporation”), you have been awarded under the Plexus Corp. 2008 Long-Term Incentive Plan, as amended (the “LTIP”), Restricted Stock Units (as defined in the LTIP) covering ______ shares of the Corporation’s common stock, $.01 par value (the “Award Shares”). Your Restricted Stock Unit Award is subject in all respects to the terms and conditions of the LTIP.

Your eligibility to receive the Award Shares is conditioned upon your continued service on the Board through __________, 20__ (the “Vesting Date”). Should you cease to be a member of the Board for any reason before the Vesting Date, your Restricted Stock Unit Award will be forfeited. Except as provided in the preceding sentence and in the next paragraph, the Award Shares will be transferred to you on the Vesting Date or as soon as practicable thereafter.

If you made a valid, timely election to defer receipt of the Award Shares, and you remain a member of the Board through the Vesting Date, then your deferral election and the terms of the Plexus Corp. Non-Employee Directors Deferred Compensation Plan will determine when the Award Shares are transferred to you (between the Vesting Date and the date of that transfer your award will be represented by Deferred Stock Units as defined in the LTIP).

As a reminder, applicable securities laws may restrict your ability to sell the shares you receive under this award. You must comply with the Corporation’s Insider Trading Restrictions and Policies, a copy of which is included with this letter. The Corporation’s counsel should be consulted on your ability to sell your shares under the 1934 Act.

As an additional reminder, the fair market value of the shares on the transfer date will be includible in your gross income (as ordinary income) and will be reported on IRS Form 1099.

Please indicate your agreement with these Award terms by signing and dating this Agreement in the space provided and returning a copy to me.

PLEXUS CORP.

By: Angelo M. Ninivaggi, Secretary

AGREED AND ACCEPTED

By:    __________________________

Date:    __________________________

EX-10.9(B)(VII)

Exhibit 10.9(b)(vii)

PLEXUS CORP.PERFORMANCE STOCK UNIT AGREEMENT

TO:        

DATE:        

In order to provide additional incentive through stock ownership for certain officers and key employees of Plexus Corp. (the “Corporation”) and its subsidiaries, you (the “Grantee”) are hereby granted a performance stock unit award (“Award”) effective as of __________, 20__ (the “Grant Date”). This Award is subject to the terms and conditions set forth in this Agreement and in the Plexus Corp. 2008 Long-Term Incentive Plan (the “Plan”), the terms of which are incorporated herein by reference.

1.Target Number of Performance Stock Units.

This Award applies to performance stock units that are based upon shares of the Corporation’s Common Stock (the “Performance Stock Units”). The Performance Stock Units granted under this Agreement are units that will be reflected in a book account maintained by the Corporation until they become earned or have been forfeited. The number of Performance Stock Units at target is as follows:

Number of Performance Stock Units (at target): ______________________

2.Performance Terms.

(a)The terms of this Section 2 will apply to your Performance Stock Units except in so far as Section 3 ("Treatment Upon Termination") or Section 5 ("Change in Control") apply.

(b)The Performance Period for your Performance Stock Units will be the three-year period commencing ________________, 20__ and ending ________________, 20__. Following the conclusion of the Performance Period, the Committee shall certify in writing the number of Performance Stock Units which are payable (your “Final Performance Stock Units”). The Committee will calculate your Final Performance Stock Units by multiplying your Performance Stock Units (at target) by the “Performance Factor.” The Performance Factor means a percentage (from zero to 200%) which is based on the Corporation’s Total Shareholder Return during the Performance Period compared to the companies in the Russell 3000 Index, determined according to Table 1 of this Agreement.

(c)All determinations made by the Committee shall be binding and conclusive on all parties.

3.Treatment Upon Termination. If your employment with the Corporation terminates prior to the end of the Performance Period, your Final Performance Stock Units will be calculated as follows:

1

(a)Death, Disability. In the event your employment terminates during the Performance Period as a result of your death or disability (as defined in the Corporation's long-term disability plan), your Final Performance Stock Units will be based upon the Corporation's Total Shareholder Return through the end of fiscal quarter preceding your termination of employment and the Award will be prorated. Your Final Performance Stock Units will be determined by multiplying your Performance Stock Units (at target) by the Performance Factor by a fraction, the numerator of which is the number of days elapsed between the beginning of the Performance Period and the date of your death or disability, and the denominator of which is the number of days in the Performance Period.

(b)Retirement. In the event your employment terminates during the Performance Period without Cause on or after age 55 and after you have been employed by the Corporation for at least 5 consecutive years immediately prior to your termination (a "Retirement"), your Final Performance Stock Units will be based upon the Corporation's Total Shareholder Return for the full Performance Period and the Award will be prorated based on your date of Retirement. The Committee will determine your Final Performance Stock Units by multiplying your Performance Stock Units (at target) by the Performance Factor by a fraction, the numerator of which is the number of days elapsed between the beginning of the Performance Period and the date of your Retirement, and the denominator of which is the number of days in the Performance Period.

(c)Termination for Cause. In the event your employment is terminated during the Performance Period for Cause, your Performance Stock Units will be forfeited immediately.

(d)Other Termination (Without Cause or Resignation). In the event your employment terminates during the Performance Period for any other reason, your Performance Stock Units will be forfeited immediately unless otherwise determined by the Committee.

4.Payment of Awards.

Except for payments pursuant to Section 5 ("Change in Control"), your Final Performance Stock Units shall be paid in the form of Common Stock and all payments will be made to you within two and a half months after the end of the Performance Period (or earlier termination of employment pursuant to Section 3).

5.Change in Control. In the event of a Change in Control:

(a)The Performance Factor shall be calculated as if the date of the Change in Control is the last day of the Performance Period. Your Final Performance Share Units will be equal to the number of Performance Stock Units (at target) times the calculated Performance Factor.

(b)Within 15 days following the Change in Control, your Final Performance Stock Units will be paid in the form of Common Stock or common stock of any successor corporation; provided that the Corporation may elect to pay an amount of cash equal to the value of the Common Stock that would otherwise be issued. The value shall be equal to the number of shares of Common Stock that would be issued times the Fair Market Value of the Common Stock at the time of the Change in Control.

2

6.Rights Prior to Payment.

Prior to any payment of the Award, you will not have any right to vote the Performance Stock Units or to receive credit for cash dividends. You will not be deemed a stockholder of the Corporation with respect to any of the Performance Stock Units. The Performance Stock Units may not be sold, assigned, transferred, pledged, encumbered or otherwise disposed of prior to payment.

7.Tax Withholding.

The Corporation shall have the power and right to deduct or withhold, or require you to remit to the Corporation, an amount sufficient to satisfy Federal, state and local taxes required by law to be withheld with respect to issuance of shares under this Agreement. You may make a written election to satisfy this withholding requirement, in whole or in part, by having the Corporation withhold shares having a Fair Market Value on the date the tax is to be determined equal to the minimum marginal total tax which could be imposed on the transaction.

8.Transfer Restrictions After Issuance.

Under applicable securities laws, you may not be able to sell any shares for a period of time after issuance, and you must comply with the Corporation’s Insider Trading Restrictions and Policies. The Corporation’s counsel should be consulted on your ability to sell your shares under the 1934 Act.

9.No Employment Agreement Intended.

Neither the establishment of, nor the awarding of Awards under this Plan shall be construed to create a contract of employment between you and the Corporation or its subsidiaries; nor does it give you the right to continue in the employment of the Corporation or its subsidiaries or limit in any way the right of the Corporation or its subsidiaries to discharge you at any time and without notice, with or without cause, or to any benefits not specifically provided by this Plan, or in any manner modify the Corporation’s right to establish, modify, amend or terminate any profit sharing, retirement or other benefit plans.

10.Section 409A Compliance.

This Award is intended to comply with the requirements of Section 409A, and shall be interpreted and administered in accordance with that intent. If any provision of the Plan or this Agreement would otherwise conflict with or frustrate this intent, the Committee may adopt such amendments to the Plan and the Agreement as the Committee deems necessary.

11.Wisconsin Contract.

This Agreement reflects an Award made in Wisconsin and shall be construed under the laws of that state without regard to the conflict of laws provision of any jurisdiction.

3

To accept this grant, logon to your E*TRADE account (www.etrade.com). By accepting this grant online you acknowledge and accept this grant and the terms and conditions. You also acknowledge receipt of this Performance Stock Unit Agreement, a copy of the 2008 Long-Term Incentive Plan, and a copy of the Insider Trading Restrictions and Policies. If this grant is not accepted online within thirty (30) days from the grant date of this Agreement, this Award will be deemed refused and may be withdrawn.

PLEXUS CORP.

By: _____________________

4

Table 1

Determination of Performance Factor

The Performance Factor shall be determined according to the following table:

Relative TSR	Payout
Percentile Rank*	Performance Factor

*TSR shall be based on the percentage increase/decrease from the Initial Price to the Final Price, and shall reflect the reinvestment of dividends paid (if any) to Common Shareholders during the Measurement Period.

Note: Payouts for performance between the percentages listed above will be interpolated.

For purposes of the foregoing calculation:

1.    “Total Shareholder Return” mean the quotient (expressed as a percentage) obtained by dividing (i)(A) the Final Price, plus (B) the aggregate amount of dividends paid in respect of a share of Common Stock during the Measurement Period (assuming reinvestment of the dividends), minus (C) the Initial Price, by (ii) the Initial Price. The calculation of Total Shareholder Return shall be adjusted to reflect stock splits, recapitalizations and similar events.

2.    “Initial Price” means the average closing price of Common Stock over the thirty calendar day period ending on the trading day immediately preceding the first day of the Performance Period.

3.    “Final Price” means the average closing price of Common Stock over the thirty calendar day period ending on the last day of the Measurement Period.

4.    "Measurement Period" means the Performance Period; provided that in the event of the Grantee's termination of employment during the Performance Period due to the Grantee's death or disability (Section 3(a)), Total Shareholder Return shall be calculated through the end of the fiscal quarter immediately preceding the Grantee's termination of employment and in the event of a Change in Control, Total Shareholder Return shall be calculated through the date of the Change in Control.

5.    The Total Shareholder Return of Plexus and each of the companies in the Russell 3000 Index constituent companies shall be determined as those companies in the Russell 3000 Index at the end of the performance period having a price history from the beginning of the performance period.

EX-21

Plexus Corp.		Exhibit 21
List of Subsidiaries of Plexus Corp.		Plexus Corp. 2013 Form 10-K
Entity Name	Incorporation Jurisdiction	Ownership
Plexus Aerospace, Defense and Security Services, LLC	USA - Wisconsin	Plexus Corp.
Plexus Asia, Ltd.	British Virgin Islands	Plexus International Services, Inc. and Plexus Corp. (UK) Limited
Plexus Corp. (UK) Limited	Scotland	Plexus Corp. Limited
Plexus Corp. Limited	Scotland	Plexus International Services, Inc.
Plexus Deutschland GmbH	Germany	Plexus International Services, Inc.
Plexus Electronica S. de R.L. de C.V.	Mexico	Plexus Intl. Sales & Logistics, LLC and Plexus QS, LLC
Plexus (Hangzhou) Co., Ltd.	China	Plexus Asia, Ltd.
Plexus International Services, Inc.	USA - Nevada	Plexus Corp.
Plexus Intl. Sales & Logistics, LLC	USA - Delaware	Plexus Corp.
Plexus Management Services Corporation	USA - Nevada	Plexus Corp.
Plexus Manufacturing Sdn. Bhd.	Malaysia	Plexus Asia, Ltd.
Plexus QS, LLC	USA - Delaware	Plexus Corp.
Plexus Services RO S.R.L.	Romania	Plexus Corp. (UK) Limited and Plexus Corp. Limited
Plexus (Thailand) Co., Ltd.	Thailand	Plexus Asia, Ltd.
Plexus (Xiamen) Co., Ltd.	China	Plexus Asia, Ltd.
Plexus (Zhejiang) Co., Ltd.	China	Plexus Asia, Ltd.
PTL Information Technology Services Corp.	USA - Nevada	Plexus Corp.
Omits inactive and dormant subsidiaries.

EX-23

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-4 (No. 333-48700) and Form S-8 (No.'s 33-89862, 333-76245, 333-76728, 333-125136 and 333-150967) of Plexus Corp. of our report dated November 22, 2013 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10‑K.

/s/ PricewaterhouseCoopers LLP

Milwaukee, WI

November 22, 2013

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Dean A. Foate, certify that:

1. I have reviewed this annual report on Form 10-K of Plexus Corp.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 22, 2013

/s/ Dean A. Foate

Dean A. Foate

Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Ginger M. Jones, certify that:

1. I have reviewed this annual report on Form 10-K of Plexus Corp.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, 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;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: November 22, 2013

/s/ Ginger M. Jones

Ginger M. Jones

Senior Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Plexus Corp. (the “Company”) on Form 10-K for the fiscal year ended September 28, 2013 as filed with the Securities and Exchange Commission on or about the date hereof (the “Report”), I, Dean A. Foate, Chairman, President and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Dean A. Foate

Dean A. Foate

Chairman, President and Chief Executive Officer

November 22, 2013

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Plexus Corp. and will be retained by Plexus Corp. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Plexus Corp. (the “Company”) on Form 10-K for the fiscal year ended September 28, 2013 as filed with the Securities and Exchange Commission on or about the date hereof (the “Report”), I, Ginger M. Jones, Senior Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Ginger M. Jones

Ginger M. Jones

Senior Vice President and Chief Financial Officer

November 22, 2013

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to Plexus Corp. and will be retained by Plexus Corp. and furnished to the Securities and Exchange Commission or its staff upon request.

EX-99.1

																		Exhibit 99.1
ROIC calculation GAAP to non-GAAP reconciliation (dollars in millions):
				Fiscal year ended
				September 28, 2013				September 29, 2012				October 1, 2011
Operating income				$	96.6			$	104.2			$	101.2
Tax rate				7.0		%	*	7.0		%	*	3.1		%
Operating income (tax effected)				$	89.9			$	96.9			$	98.1
Average invested capital				$	642.1			$	623.0			$	627.6
ROIC				14.0		%		15.5		%		15.6		%
Average Invested Capital
	Actual			Actual				Actual				Actual			Actual			Average
	9/28/2013			6/29/2013				3/30/2013				12/29/2012			9/29/12			invested capital
Equity	$	699.3		$	679.5			$	669.0			$	664.5		$	649.0
Plus:
Debt - current	3.6			3.0				2.9				10.3			10.2
Debt - non-current	257.8			258.8				258.8				259.5			260.2
Less:
Cash and cash equivalents	(341.9		)	(285.6		)		(276.5		)		(274.1		)	(297.6		)
	$	618.8		$	655.7			$	654.2			$	660.2		$	621.8		$	642.1
	Actual			Actual				Actual				Actual			Actual			Average
	9/29/2012			6/30/2012				3/31/2012				12/31/2011			10/1/2011			invested capital
Equity	$	649.0		$	638.6			$	615.3			$	581.8		$	558.9
Plus:
Debt - current	10.2			13.8				17.5				17.5			17.3
Debt - non-current	260.2			260.8				261.6				265.9			270.3
Less:
Cash and cash equivalents	(297.6		)	(277.9		)		(257.8		)		(248.3		)	(242.1		)
	$	621.8		$	635.3			$	636.6			$	616.9		$	604.4		$	623.0
	Actual			Actual				Actual				Actual			Actual			Average
	10/1/2011			7/2/2011				4/2/2011				1/1/2011			10/2/2010			invested capital
Equity	$	558.9		$	572.6			$	630.4			$	680.5		$	651.8
Plus:
Debt - current	17.3			17.2				17.1				17.0			$	17.4
Debt - non-current	270.3			274.7				104.0				108.2			112.5
Less:
Cash and cash equivalents	(242.1		)	(208.7		)		(123.4		)		(149.5		)	(188.2		)
	$	604.4		$	655.8			$	628.1			$	656.2		$	593.5		$	627.6
*Tax rate does not include the impact of the valuation allowance for deferred tax assets. See Consolidated Financial Statements for further discussion.

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Litigation

12 Months Ended

Sep. 28, 2013

Litigation [Abstract]

Litigation

Litigation

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

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Income Taxes (Narrative) (Details) (USD $)	12 Months Ended										12 Months Ended	3 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011	Sep. 28, 2013 UNITED STATES	Sep. 29, 2012 UNITED STATES	Sep. 28, 2013 GERMANY	Sep. 28, 2013 United Kingdom [Member]	Sep. 28, 2013 Romania [Member]	Sep. 28, 2013 China [Member]	Sep. 28, 2013 State and Local Jurisdiction [Member]	Sep. 29, 2012 Germany and Romania [Member]	Sep. 28, 2013 United Kingdom [Member]	Sep. 28, 2013 Out-of-period tax errors [Member]
Income Tax Expense (Benefit)	$ 2,724,000	$ 29,142,000	$ 2,847,000									$ 1,800,000	$ 3,200,000
Income Tax Expense (Benefit), Income Tax Exp (Ben) per share												0.05	0.09
Valuation Allowance, Deferred Tax Asset, Change in Amount	7,000,000	24,100,000		2,400,000	22,800,000	1,000,000	2,400,000	900,000	300,000		1,300,000
Deferred Tax Assets, Net	8,246,000	15,471,000
Valuation allowance related to various deferred income tax assets	34,075,000	27,087,000
Tax reductions due to tax holiday	22,700,000	17,500,000	21,700,000
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.66	$ 0.50	$ 0.57
Aggregate Undistributed Earnings Of Foreign Subsidiaries	567,300,000
Operating Loss Carryforwards										81,600,000
Valuation Allowance Related To Tax Deductions For Stock-Based Compensation	2,600,000
Cash paid for income taxes	5,300,000	9,000,000
Proceeds from Income Tax Refunds			2,200,000
Uncertain tax benefits	7,400,000
Unrecognized tax benefits that would reduce company's effective tax rate if recognized	5,300,000	6,500,000
Total accrued penalties and net accrued interest with respect to income taxes	1,100,000	900,000	700,000
Expense for accrued penalties and net accrued interest	$ 200,000

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Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012
Statement of Financial Position [Abstract]
Accounts receivable, allowances	$ 1,008	$ 1,011
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	49,176,000	48,851,000
Common stock, shares outstanding	33,600,000	35,097,000
Treasury stock, shares	15,576,000	13,754,000

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Property, Plant And Equipment

12 Months Ended

Sep. 28, 2013

Property, Plant and Equipment, Net [Abstract]

Property, Plant And Equipment

Property, Plant and Equipment

Property, plant and equipment as of September 28, 2013 and September 29, 2012 consisted of (in thousands):

	2013		2012
Land, buildings and improvements	$	212,195	$	170,557
Machinery and equipment	312,941		295,548
Computer hardware and software	91,565		85,433
Construction in progress	67,518		39,894
	684,219		591,432
Less: accumulated depreciation	359,158		326,241
	$	325,061	$	265,191

The major component of the construction in progress balance is related to the footprint expansion in Neenah, Wisconsin.

Assets held under capital leases and included in property, plant and equipment as of September 28, 2013 and September 29, 2012 consisted of (in thousands):

	2013		2012
Buildings and improvements	$	23,147	$	23,009
Machinery and equipment	3,294		1,873
	26,441		24,882
Less: accumulated amortization	16,513		13,909
	$	9,928	$	10,973

The building and improvements category in the above table includes a leased manufacturing facility in San Diego, California, which 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 $6.5 million as of September 28, 2013.

Amortization of assets held under capital leases totaled $0.6 million, $0.8 million, and $0.9 million for fiscal 2013, 2012 and 2011, respectively. There was $1.4 million of capital lease additions for fiscal 2013 and $0.1 million for fiscal 2012. There were no such additions for fiscal 2011.

As of September 28, 2013, September 29, 2012 and October 1, 2011, accounts payable included approximately $10.9 million, $11.5 million and $12.3 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.

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Description Of Business And Significant Accounting Policies (Tables)

12 Months Ended

Sep. 28, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule Of Cash And Cash Equivalents

As of September 28, 2013 and September 29, 2012, cash and cash equivalents were the following (in thousands):

	2013		2012
Cash	$	157,988	$	124,648
Money market funds and other	183,877		172,971
	$	341,865	$	297,619

Schedule of Property, Plant And Equipment, Useful Lives

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:

Buildings and improvements	15-50 years
Machinery and equipment	3-10 years
Computer hardware and software	3-10 years

Schedule Of Accumulated Other Comprehensive Income

Accumulated other comprehensive income consists of the following as of September 28, 2013 and September 29, 2012 (in thousands):

	2013		2012
Foreign currency translation adjustments	$	19,448	$	12,694
Cumulative change in fair market value of derivative instruments, net of tax	789		3,490
Accumulated other comprehensive income	$	20,237	$	16,184

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Reportable Segments, Geographic Information And Major Customers (Reportable Segments Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Revenue, Net	$ 567,730	$ 571,945	$ 557,824	$ 530,532	$ 594,789	$ 608,819	$ 573,470	$ 529,654	$ 2,228,031	$ 2,306,732	$ 2,231,232
Elimination of inter-segment sales									(103,592)	(154,844)	(229,001)
Depreciation									47,410	47,918	46,634
Operating income (loss)									96,623	104,159	101,179
Segment Reporting, Additional Information about Entity's Reportable Segments									108122	63697	70819
Total assets	1,447,684				1,411,467				1,447,684	1,411,467
AMER [Member]
Revenue, Net									1,062,758	1,255,851	1,304,885
Depreciation									13,474	14,486	15,045
Operating income (loss)									70,863	91,087	68,725
Segment Reporting, Additional Information about Entity's Reportable Segments									60507	11532	12578
Total assets	423,048				403,911				423,048	403,911
APAC [Member]
Revenue, Net									1,146,299	1,110,365	1,063,079
Depreciation									23,560	23,428	20,723
Operating income (loss)									116,350	101,903	118,063
Segment Reporting, Additional Information about Entity's Reportable Segments									12345	39321	44890
Total assets	828,672				771,781				828,672	771,781
EMEA [Member]
Revenue, Net									122,566	95,360	92,269
Depreciation									4,644	3,438	2,947
Operating income (loss)									(3,096)	(2,325)	(2,955)
Segment Reporting, Additional Information about Entity's Reportable Segments									30836	9863	10233
Total assets	111,977				88,420				111,977	88,420
Corporate [Member]
Depreciation									5,732	6,566	7,919
Operating income (loss)									(87,494)	(86,506)	(82,654)
Segment Reporting, Additional Information about Entity's Reportable Segments									4434	2981	3118
Total assets	$ 83,987				$ 147,355				$ 83,987	$ 147,355

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Income Taxes (Schedule Of Reconciliation Of Federal Statutory Income Tax Rate To Effective Income Tax Rates) (Details)	12 Months Ended
	Sep. 28, 2013 Rate	Sep. 29, 2012 Rate	Oct. 01, 2011 Rate
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal statutory income tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal income tax		0.20%	(0.30%)
Foreign tax rate differences	(34.40%)	(27.50%)	(34.50%)
Valuation reserve for deferred tax assets	5.80%	26.50%	1.40%
Other, net	(3.20%)	(2.30%)	1.50%
Effective income tax rate	3.20%	31.90%	3.10%

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Reportable Segments, Geographic Information And Major Customers

12 Months Ended

Sep. 28, 2013

Segment Reporting [Abstract]

Reportable Segments, Geographic Information And Major Customers

Reportable Segments, Geographic Information and Major Customers

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, interest income, other miscellaneous income (expense), 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 for fiscal 2013, 2012 and 2011 were as follows (in thousands):

	2013			2012			2011
Net sales:
AMER	$	1,062,758		$	1,255,851		$	1,304,885
APAC	1,146,299			1,110,365			1,063,079
EMEA	122,566			95,360			92,269
Elimination of inter-segment sales	(103,592		)	(154,844		)	(229,001		)
	$	2,228,031		$	2,306,732		$	2,231,232
Depreciation:
AMER	$	13,474		$	14,486		$	15,045
APAC	23,560			23,428			20,723
EMEA	4,644			3,438			2,947
Corporate	5,732			6,566			7,919
	$	47,410		$	47,918		$	46,634
Operating income (loss):
AMER	$	70,863		$	91,087		$	68,725
APAC	116,350			101,903			118,063
EMEA	(3,096		)	(2,325		)	(2,955		)
Corporate and other costs	(87,494		)	(86,506		)	(82,654		)
	$	96,623		$	104,159		$	101,179
Capital expenditures:
AMER	$	60,507		$	11,532		$	12,578
APAC	12,345			39,321			44,890
EMEA	30,836			9,863			10,233
Corporate	4,434			2,981			3,118
	$	108,122		$	63,697		$	70,819
	September 28, 2013			September 29, 2012
Total assets:
AMER	$	423,048		$	403,911
APAC	828,672			771,781
EMEA	111,977			88,420
Corporate	83,987			147,355
	$	1,447,684		$	1,411,467

The following enterprise-wide information is provided in accordance with the required segment disclosures for fiscal 2013, 2012 and 2011. Net sales to unaffiliated customers were based on the Company’s location providing product or services (in thousands):

	2013			2012			2011
Net sales:
United States	$	1,004,153		$	1,156,347		$	1,192,389
Malaysia	877,748			872,733			836,808
China	268,551			237,632			226,271
United Kingdom	81,657			60,313			75,771
Mexico	58,605			99,504			112,496
Romania	38,117			33,835			16,498
Germany	2,792			1,212			—
Elimination of inter-segment sales	(103,592		)	(154,844		)	(229,001		)
	$	2,228,031		$	2,306,732		$	2,231,232
	September 28, 2013			September 29, 2012
Long-lived assets:
United States	$	110,548		$	61,269
Malaysia	83,732			95,907
China	35,230			36,737
United Kingdom	14,645			9,256
Mexico	5,610			7,368
Romania	37,188			13,586
Germany	616			623
Other Foreign	5,463			5,540
Corporate	32,029			34,905
	$	325,061		$	265,191

Due to the Company being a contract manufacturer that produces unique products and services related to each contract, it is impracticable to provide revenue by product/service information.

Long-lived assets as of September 28, 2013 and September 29, 2012 exclude other long-term assets and deferred income tax assets which totaled $43.6 million and $46.5 million, respectively.

The percentages of net sales to customers representing 10 percent or more of total net sales for fiscal 2013, 2012 and 2011 were as follows:

	2013	2012	2011
Juniper Networks, Inc. (“Juniper”)	13%	16%	17%

For our significant customers, we generally manufacture products in more than one location. For example, net sales to Juniper, our largest customer in all periods presented, occurred in the AMER and APAC reportable segments. Production for Juniper concluded at the end of our third fiscal quarter of 2013. However, sales of certain inventory continued into our fourth fiscal quarter of 2013. We do not expect to incur any material adjustments related to this inventory. We expect no further shipments to Juniper in fiscal 2014.

No customer represented 10 percent or more of total accounts receivable as of September 28, 2013 or September 29, 2012.

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Debt, Capital Lease Obligations And Other Financing (Schedule Of Aggregate Scheduled Maturities Of Obligations Under Capital Leases) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013
Debt and Capital Lease Obligations [Abstract]
2014	$ 4,550
2015	4,595
2016	3,197
2017	689
2018	0
Thereafter	0
Obligations under capital leases, gross	13,031
Less: interest portion of capital leases	(1,684)
Total	$ 11,347

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Income Taxes (Schedule Of Components Of Net Deferred Income Tax Asset) (Details) (USD $)	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Operating Loss Carryforwards [Line Items]
Proceeds from Income Tax Refunds			$ 2,200,000
Valuation Allowance Related To Tax Deductions For Stock-Based Compensation	2,600,000
Tax reductions due to tax holiday	22,700,000	17,500,000	21,700,000
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.66	$ 0.50	$ 0.57
Aggregate Undistributed Earnings Of Foreign Subsidiaries	567,300,000
Valuation Allowance, Deferred Tax Asset, Change in Amount	7,000,000	24,100,000
Loss/credit carryforwards	12,985,000	12,175,000
Goodwill	1,268,000	2,024,000
Inventories	4,997,000	4,870,000
Accrued benefits	19,428,000	17,768,000
Allowance for bad debts	339,000	322,000
Interest rate swaps		664,000
Other	3,304,000	4,735,000
Total gross deferred income tax assets	42,321,000	42,558,000
Less valuation allowance	(34,075,000)	(27,087,000)
Deferred income tax assets	8,246,000	15,471,000
Property, plant and equipment	3,934,000	7,404,000
Other	13,000	1,500,000
Deferred income tax liabilities	3,947,000	8,904,000
Net deferred income tax asset	4,299,000	6,567,000
UNITED STATES
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	2,400,000	22,800,000
Germany and Romania [Member]
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount		1,300,000
UNITED KINGDOM
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	2,400,000
GERMANY
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	1,000,000
China [Member]
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	300,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	81,600,000
ROMANIA
Operating Loss Carryforwards [Line Items]
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 900,000

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Description Of Business And Significant Accounting Policies (Schedule Of Cash And Cash Equivalents) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011	Oct. 02, 2010
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash	$ 157,988	$ 124,648
Money market funds and other	183,877	172,971
Cash and cash equivalents	$ 341,865	$ 297,619	$ 242,107	$ 188,244

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Debt, Capital Lease Obligations And Other Financing (Tables)

12 Months Ended

Sep. 28, 2013

Debt and Capital Lease Obligations [Abstract]

Schedule Of Debt And Capital Lease Obligations

Debt and capital lease obligations as of September 28, 2013 and September 29, 2012, consisted of (in thousands):

	2013			2012
Debt:
Borrowings under term loan, expiring on May 15, 2017, interest rate of LIBOR plus 1.13%. See also Note 6, "Derivatives and Fair Value Measurements."	$	75,000		$	82,500
Borrowings under senior notes, expiring on June 15, 2018, interest rate of 5.20%. See also Note 6, "Derivatives and Fair Value Measurements."	175,000			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 rate of 9.3% for fiscal 2013 and 10.3% for fiscal 2012, respectively.	11,347			12,922
Less: current portion	(3,574		)	(10,211		)
Long-term debt and capital lease obligations, net of current portion	$	257,773		$	260,211

Schedule Of Aggregate Scheduled Maturities Of Debt Obligations

The aggregate scheduled maturities of the Company’s debt obligations as of September 28, 2013, are as follows (in thousands):

2014	$	—
2015	—
2016	—
2017	75,000
2018	175,000
Thereafter	—
Total	$	250,000

Schedule Of Aggregate Scheduled Maturities Of Obligations Under Capital Leases

The aggregate scheduled maturities of the Company’s obligations under capital leases as of September 28, 2013, are as follows (in thousands):

2014	$	4,550
2015	4,595
2016	3,197
2017	689
2018	—
Thereafter	—
	13,031
Less: interest portion of capital leases	(1,684		)
Total	$	11,347

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Property, Plant And Equipment (Tables)

12 Months Ended

Sep. 28, 2013

Schedule Of Property, Plant And Equipment

Property, plant and equipment as of September 28, 2013 and September 29, 2012 consisted of (in thousands):

	2013		2012
Land, buildings and improvements	$	212,195	$	170,557
Machinery and equipment	312,941		295,548
Computer hardware and software	91,565		85,433
Construction in progress	67,518		39,894
	684,219		591,432
Less: accumulated depreciation	359,158		326,241
	$	325,061	$	265,191

Assets Held Under Capital Leases [Member]

Schedule Of Property, Plant And Equipment

Assets held under capital leases and included in property, plant and equipment as of September 28, 2013 and September 29, 2012 consisted of (in thousands):

	2013		2012
Buildings and improvements	$	23,147	$	23,009
Machinery and equipment	3,294		1,873
	26,441		24,882
Less: accumulated amortization	16,513		13,909
	$	9,928	$	10,973

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Debt, Capital Lease Obligations And Other Financing (Schedule Of Debt And Capital Lease Obligations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011	Sep. 28, 2013 Term Loans New Credit Facility [Member] Rate	Sep. 29, 2012 Term Loans New Credit Facility [Member]	May 15, 2012 Term Loans Prior Credit Facility [Member]	Apr. 04, 2008 Term Loans Prior Credit Facility [Member]	Sep. 28, 2013 Senior Notes [Member] Rate	Sep. 29, 2012 Senior Notes [Member]	Sep. 28, 2013 Capital Lease Obligations [Member] Rate	Sep. 29, 2012 Capital Lease Obligations [Member] Rate
Borrowings under term loan					$ 82,500	$ 90,000	$ 150,000
Borrowings under senior notes, expiring on June 15, 2018, interest rate of 5.20%								175,000	175,000
Capital lease obligations for equipment and facilities	11,347	12,922
Less: current portion	(3,574)	(10,211)
Long-term debt and capital lease obligations, net of current portion	257,773	260,211
Borrowings under term loan, LIBOR rate plus				1.125%
Debt Instrument, Interest Rate, Stated Percentage								5.20%
Debt, Weighted Average Interest Rate										9.30%	10.30%
Proceeds from Issuance of Debt	30,000	89,082	175,000
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities	(41,018)	(107,354)	(17,420)
Repayments of Long-term Debt	$ (30,000)

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Guarantees (Tables)

12 Months Ended

Sep. 28, 2013

Guarantees [Abstract]

Schedule Of Limited Warranty Liability

Below is a table summarizing the activity related to the Company’s limited warranty liability for the fiscal years 2013 and 2012 (in thousands):

Limited warranty liability, as of October 1, 2011	$	5,453
Accruals for warranties issued during the period	649
Settlements (in cash or in kind) during the period	(957		)
Limited warranty liability, as of September 29, 2012	5,145
Accruals for warranties issued during the period	1,168
Settlements (in cash or in kind) during the period	(371		)
Limited warranty liability, as of September 28, 2013	$	5,942

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Description Of Business And Significant Accounting Policies (Schedule Of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Foreign currency translation adjustment	$ 19,448	$ 12,694
Cumulative change in fair market value of derivative instruments, net of tax	789	3,490
Accumulated other comprehensive income	$ 20,237	$ 16,184

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Derivatives And Fair Value Measurements (Narrative) (Details) (USD $)		12 Months Ended
	Jun. 28, 2008	Sep. 28, 2013 Interest Rate Swaps [Member]	Sep. 29, 2012 Interest Rate Swaps [Member]	Jun. 28, 2008 Interest Rate Swaps [Member]	Sep. 28, 2013 First Interest Rate Swaps Contracts [Member]	Jun. 28, 2008 First Interest Rate Swaps Contracts [Member]	Jun. 28, 2008 Second Interest Rate Swaps Contracts [Member]	Jun. 28, 2008 Third Interest Rate Swaps Contracts [Member]	Sep. 28, 2013 Malaysian Operations [Member] Forward Contracts [Member]	Sep. 29, 2012 Malaysian Operations [Member] Forward Contracts [Member]	May 15, 2012 Term Loans Prior Credit Facility [Member]	Apr. 04, 2008 Term Loans Prior Credit Facility [Member]	Sep. 28, 2013 Term Loans New Credit Facility [Member]
Notional amount of forward exchange contracts		$ 75,000,000		$ 150,000,000					$ 71,000,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net		2,000,000
Total fair value of the forward contracts									(1,000,000)
Foreign Currency Contract, Asset, Fair Value Disclosure										1,100,000
Number of contracts	3
Credit facility outstanding at end of period											90,000,000	150,000,000	75,000,000
Fixed interest rate					0.875%	4.415%	4.49%	4.435%
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net		0
Interest Rate Cash Flow Hedge Liability at Fair Value			$ 1,715,000

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Operating Lease Commitments (Tables)

12 Months Ended

Sep. 28, 2013

Operating Lease Commitments

Schedule Of Future Minimum Annual Payments On Operating Leases

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

2014	$	12,689
2015	8,554
2016	6,017
2017	3,663
2018	2,942
Thereafter	12,107
	$	45,972

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Benefit Plans (Schedule Of Stock Option And Stock Appreciation Rights Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Number of Options/SARs Exercisable	2,375	2,327	2,383
Exercisable, Weighted Average Exercise Price	$ 29.49	$ 28.32	$ 26.38
Exercise Price Range from 12.94 to 19.41 [Member]
Number of Options/SARs Outstanding	278
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 14.75
Weighted Average Remaining Life	3 years
Number of Options/SARs Exercisable	278
Exercisable, Weighted Average Exercise Price	$ 14.75
Exercise Price Range from 12.94 to 19.41 [Member] | Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 12.94
Exercise Price Range from 12.94 to 19.41 [Member] | Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 19.41
Exercise Price Range from 19.42 to 29.12 [Member]
Number of Options/SARs Outstanding	1,269
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 25.02
Weighted Average Remaining Life	6 years 2 months 12 days
Number of Options/SARs Exercisable	804
Exercisable, Weighted Average Exercise Price	$ 24.43
Exercise Price Range from 19.42 to 29.12 [Member] | Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 19.42
Exercise Price Range from 19.42 to 29.12 [Member] | Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 29.12
Exercise Price Range from 29.13 to 42.52 [Member]
Number of Options/SARs Outstanding	1,518
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 35.48
Weighted Average Remaining Life	5 years 3 months 18 days
Number of Options/SARs Exercisable	1,293
Exercisable, Weighted Average Exercise Price	$ 35.81
Exercise Price Range from 29.13 to 42.52 [Member] | Minimum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit	$ 29.13
Exercise Price Range from 29.13 to 42.52 [Member] | Maximum [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit	$ 42.52
Exercise Price Range from 12.94 to 42.52 [Member]
Number of Options/SARs Outstanding	3,065
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 29.27
Weighted Average Remaining Life	5 years 6 months
Number of Options/SARs Exercisable	2,375
Exercisable, Weighted Average Exercise Price	$ 29.49
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years
2008 Long-Term Incentive Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	300	300	100
2008 Long-Term Incentive Plan [Member] | Unrestricted Stock Awards (SAs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	0	0	0

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Shareholders' Equity (Details) (USD $)	3 Months Ended			12 Months Ended
	Sep. 28, 2013	Dec. 29, 2012	Apr. 02, 2011	Sep. 28, 2013 Rate	Sep. 29, 2012	Oct. 01, 2011
Stockholders' Equity Note [Abstract]
Payments for Repurchase of Common Stock				$ 49,858,000		$ 200,000,000
Common stock repurchased	$ (30,000,000)	$ (50,000,000)	$ (200,000,000)
Stock Repurchased During Period, Shares				1,821,698		6,300,000
Common stock repurchased, average price				$ 27.37		$ 31.69
Preferred stock, par value	$ 0.01			$ 0.01	$ 0.01
Preferred stock purchase rights under Rights Agreement				125.00
Minimum percentage of common stock required for Rights exercisable				20.00%

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Benefit Plans (Schedule Of Stock Option And Stock Appreciation Rights Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercisable, Number of Options/SARs	2,375	2,327	2,383
Exercisable, Weighted Average Exercise Price	$ 29.49	$ 28.32	$ 26.38
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 19,763

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Property, Plant And Equipment (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Property, plant and equipment, net	$ 325,061,000	$ 265,191,000
Amortization of assets held under capital leases	600,000	800,000	900,000
Accounts payable related to the purchase of property, plant and equipment	10,900,000	11,500,000	12,300,000
Capital Lease Additions [Member]
Capital lease additions	1,400,000	100,000	0.00
San Diego Facility [Member]
Property, plant and equipment, net	$ 6,500,000

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Reportable Segments, Geographic Information And Major Customers (Concentration Of Risk) (Details) (Juniper Networks [Member])	12 Months Ended
	Sep. 28, 2013 Rate	Sep. 29, 2012 Rate	Oct. 01, 2011 Rate
Juniper Networks [Member]
Segment Reporting Information [Line Items]
Major Customers Revenues As Percentage of Net Revenues	13.00%	16.00%	17.00%

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Inventories (Tables)

12 Months Ended

Sep. 28, 2013

Inventory, Net [Abstract]

Schedule Of Inventories

Inventories as of September 28, 2013 and September 29, 2012 consisted of (in thousands):

	2013		2012
Raw materials	$	288,559	$	337,657
Work-in-process	57,883		47,182
Finished goods	57,578		72,852
	$	404,020	$	457,691

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Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Cash flows from operating activities
Net income	$ 82,259	$ 62,089	$ 89,256
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation	47,410	47,918	46,634
Amortization of intangibles	2,066	1,296
Gain on sale of property, plant and equipment	(104)	1,353	175
Share-based Compensation	11,782	12,535	11,041
Deferred income taxes	(1,773)	23,758	(3,028)
Changes in operating assets and liabilities, excluding effects of acquisitions:
Accounts receivable	(19,657)	38,577	(28,551)
Inventories	(55,193)	(24,105)	(38,152)
Prepaid expenses and other	8,888	9,784	(322)
Accounts payable	(28,490)	34,314	(60,705)
Customer deposits	32,712	5,485	3,332
Accrued Liabilities	(4,385)	(4,283)	5,071
Cash flows provided by operating activities	207,647	157,503	158,451
Cash flows from investing activities
Payments for property, plant and equipment	(108,122)	(63,697)	(70,819)
Proceeds from Sale of Property, Plant, and Equipment	873	3,670	2,145
Sale of long-term investments		2,000
Payments for business acquisition, net of cash acquired		(34,155)
Cash flows used in investing activities	(107,249)	(92,182)	(68,674)
Cash flows from financing activities
Proceeds from Issuance of Debt	30,000	89,082	175,000
Purchases of common stock	(49,858)		(200,000)
Payments on debt and capital lease obligations	(41,018)	(107,354)	(17,420)
Proceeds from exercise of stock options	3,778	6,820	6,000
Minimum tax withholding related to vesting of restricted stock	(350)	(1,373)	(534)
Income tax benefit of stock option exercises		2,014
Cash flows (used in) provided by financing activities	(57,448)	(10,811)	(36,954)
Effect of foreign currency translation on cash and cash equivalents	1,296	1,002	1,040
Net increase (decrease) in cash and cash equivalents	44,246	55,512	53,863
Cash and cash equivalents, beginning of year	297,619	242,107	188,244
Cash and cash equivalents, end of year	$ 341,865	$ 297,619	$ 242,107

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Business Combination

12 Months Ended

Sep. 28, 2013

Business Combination [Abstract]

Business Combination Disclosure [Text Block]

Business Combination

In January 2012, Plexus and Kontron AG (“Kontron”) entered into a strategic manufacturing arrangement, and completed the related asset purchase transaction described below. Under this arrangement, Kontron transitioned all manufacturing of its Kontron Design Manufacturing Services (M) Sdn. Bhd. subsidiary (“KDMS”) located in Penang, Malaysia to Plexus facilities in Penang. Plexus acquired the inventory and equipment of KDMS for an adjusted purchase price of $34.2 million, reflecting certain post-closing adjustments, which was paid with cash on-hand, and hired substantially all of KDMS's employees. No real estate was included in this transaction. This transaction was accounted for as a business combination. The purchase price was allocated primarily to inventory and equipment. An identifiable intangible asset of $4.0 million related to a customer relationship was recorded within other non-current assets in the Company's accompanying Consolidated Balance Sheets as a result of the arrangement and is being amortized on a straight-line basis over a two year period. Assuming this transaction had been made at the beginning of any period presented, the consolidated pro forma results would not have been materially different from reported results.

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Debt, Capital Lease Obligations And Other Financing

12 Months Ended

Sep. 28, 2013

Debt and Capital Lease Obligations [Abstract]

Debt, Capital Lease Obligations And Other Financing

Debt, Capital Lease Obligations and Other Financing

Debt and capital lease obligations as of September 28, 2013 and September 29, 2012, consisted of (in thousands):

	2013			2012
Debt:
Borrowings under term loan, expiring on May 15, 2017, interest rate of LIBOR plus 1.13%. See also Note 6, "Derivatives and Fair Value Measurements."	$	75,000		$	82,500
Borrowings under senior notes, expiring on June 15, 2018, interest rate of 5.20%. See also Note 6, "Derivatives and Fair Value Measurements."	175,000			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 rate of 9.3% for fiscal 2013 and 10.3% for fiscal 2012, respectively.	11,347			12,922
Less: current portion	(3,574		)	(10,211		)
Long-term debt and capital lease obligations, net of current portion	$	257,773		$	260,211

The aggregate scheduled maturities of the Company’s debt obligations as of September 28, 2013, are as follows (in thousands):

2014	$	—
2015	—
2016	—
2017	75,000
2018	175,000
Thereafter	—
Total	$	250,000

The aggregate scheduled maturities of the Company’s obligations under capital leases as of September 28, 2013, are as follows (in thousands):

2014	$	4,550
2015	4,595
2016	3,197
2017	689
2018	—
Thereafter	—
	13,031
Less: interest portion of capital leases	(1,684		)
Total	$	11,347

On May 15, 2012, the Company entered into a five-year, $250 million senior unsecured credit facility that terminates on May 15, 2017 (the “Credit Facility”). The Credit Facility includes a $160 million revolving credit facility and a $90 million term loan. The revolving credit facility may be increased by $100 million (the "increase option") to $260 million generally by mutual agreement of the Company, the lenders, the letter of credit issuers and the administrative agent named in the related credit agreement (the "Credit Agreement"), subject to certain customary conditions. The Credit Facility was used to refinance the Company's then-existing $100 million senior unsecured revolving credit facility (no amounts were outstanding at that time) and its $150 million senior unsecured term loan (balance of $90.0 million as of May 15, 2012), and for general corporate purposes. Quarterly principal repayments of the Credit Facility term loan of $3.75 million per quarter began June 29, 2012 and ended on March 28, 2013. The final $75.0 million payment is due on May 15, 2017. The Company had term loan borrowings outstanding under the Credit Facility of $75.0 million and $82.5 million as of September 28, 2013 and September 29, 2012, respectively. During fiscal 2013, the Company borrowed and repaid $30.0 million under the revolving credit facility. There were no revolving borrowings under the Credit Facility as of September 28, 2013 and September 29, 2012.

The financial covenants (as defined in the Credit Agreement) require that the Company maintain, as of each fiscal quarter end, a maximum total leverage ratio and a minimum interest coverage ratio. As of September 28, 2013, the Company was in compliance with all financial covenants of the Credit Agreement. Borrowings under the Credit Facility, at the Company's option, bear interest at a defined base rate or the LIBOR rate plus, in each case, an applicable margin based upon the Company's leverage ratio as defined in the Credit Agreement. Rates would increase upon negative changes in specified Company financial metrics and would decrease to no less than LIBOR plus 1.0% or base rate plus 0% upon reduction in the current total leverage ratio. As of September 28, 2013, the Company had a borrowing rate of LIBOR plus 1.13%. As of September 28, 2013, all outstanding debt under the Credit Facility is at a fixed interest rate as a result of the interest rate swap contract discussed in Note 6, "Derivatives and Fair Value Measurements." There is no floating rate debt outstanding under the Credit Facility as of September 28, 2013. The Company is also required to pay an annual commitment fee on the unused revolver credit commitment based on the Company's leverage ratio; the fee was 0.2% as of September 28, 2013.

In the second quarter of fiscal 2012, the Company incurred approximately $0.9 million in new debt issuance costs in connection with the new Credit Facility, which are being amortized over the five-year term of the Credit Facility.

The Company also has outstanding 5.20% Senior Notes, due on June 15, 2018 (the “Notes”); $175 million principal of the Notes was outstanding as of both September 28, 2013 and September 29, 2012. At September 28, 2013, the Company was in compliance with all financial covenants relating to the Notes, which are consistent with those in the Credit Agreement discussed above.

Cash paid for interest in fiscal 2013, 2012 and 2011 was $12.9 million, $16.4 million and $8.6 million, respectively.

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Quarterly Financial Data (Schedule Of Quarterly Financial Data) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Earnings per Share, Diluted [Line Items]
Earnings Per Share, Diluted	$ 0.71	$ 0.68	$ 0.52	$ 0.47	$ 0.02	$ 0.66	$ 0.56	$ 0.51	$ 2.36	$ 1.75	$ 2.30
Revenue, Net	$ 567,730	$ 571,945	$ 557,824	$ 530,532	$ 594,789	$ 608,819	$ 573,470	$ 529,654	$ 2,228,031	$ 2,306,732	$ 2,231,232
Gross Profit	54,529	55,473	52,021	51,162	56,244	57,393	54,624	51,652	213,185	219,913	214,742
Net income	$ 24,464	$ 23,204	$ 17,975	$ 16,616	$ 728	$ 23,533	$ 19,958	$ 17,870	$ 82,259	$ 62,089	$ 89,256
Earnings Per Share, Basic	$ 0.73	$ 0.69	$ 0.52	$ 0.48	$ 0.02	$ 0.67	$ 0.57	$ 0.52	$ 2.40	$ 1.78	$ 2.34
Discrete Tax Impact on Diluted Earnings per Share [Member]
Earnings per Share, Diluted [Line Items]
Earnings Per Share, Diluted	$ 0.67

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Inventories

12 Months Ended

Sep. 28, 2013

Inventory, Net [Abstract]

Inventories

Inventories

Inventories as of September 28, 2013 and September 29, 2012 consisted of (in thousands):

	2013		2012
Raw materials	$	288,559	$	337,657
Work-in-process	57,883		47,182
Finished goods	57,578		72,852
	$	404,020	$	457,691

Per contractual terms, customer deposits are received by the Company to offset obsolete and excess inventory risks. The total amount of customer deposits related to inventory and included within current liabilities on the accompanying Consolidated Balance Sheets as of September 28, 2013 and September 29, 2012 was $51.6 million and $34.8 million, respectively. Approximately $11.0 million of the inventory customer deposit balance as of September 28, 2013 relates to Juniper Networks, Inc. ("Juniper"), which disengaged from the Company in fiscal 2013.

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Business Combination (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Sep. 28, 2013
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Gross		$ 4.0
Kontron Design Manufacturing Services [Member]
Business Acquisition [Line Items]
Business Acquisition, Cost of Acquired Entity, Cash Paid	$ 34.2
Business Acquisition Intangible Asset Acquired Amortization Period		2

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Derivatives And Fair Value Measurements (Tables)

12 Months Ended

Sep. 28, 2013

Derivatives, Fair Value [Line Items]

Schedule Of Fair Values Of Derivative Instruments

Fair Values of Derivative Instruments
In thousands of dollars
	Asset Derivatives			Liability Derivatives
		September 28, 2013	September 29, 2012		September 28, 2013	September 29, 2012
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value	Fair Value	Balance Sheet Location	Fair Value	Fair Value
Interest rate swaps	Prepaid expenses and other	$34	$—	Current liabilities – Other	$—	$1,715
Forward contracts	Prepaid expenses and other	$—	$1,095	Current liabilities – Other	$999	$—

Schedule Of Fair Value Measurements Using Input Levels

The following table lists the fair values of assets/(liabilities) of the Company’s derivatives as of September 28, 2013, by input level as defined in Note 1, "Description of Business and Significant Accounting Policies":

	Fair Value Measurements Using Input Levels Asset/ (Liability) (in thousands):
Fiscal year ended September 28, 2013	Level 1	Level 2	Level 3	Total
Derivatives
Interest rate swaps	$—	$34	$—	$34
Forward currency forward contracts	$—	$(999)	$—	$(999)
Fiscal year ended September 29, 2012
Derivatives
Interest rate swaps	$—	$(1,715)	$—	$(1,715)
Forward currency forward contracts	$—	$1,095	$—	$1,095

Cash Flow Hedging [Member]

Derivatives, Fair Value [Line Items]

Schedule Of The Effect Of Derivative Instruments On The Statements Of Operations

The Effect of Derivative Instruments on the Statements of Comprehensive Income 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)
	September 28, 2013	September 29, 2012		September 28, 2013	September 29, 2012		September 28, 2013	September 29, 2012
Interest rate swaps	$961	$(40)	Interest income (expense)	$(788)	$(3,564)	Other income (expense)	$—	$—
Forward contracts	$(1,389)	$3,021	Selling and administrative expenses	$709	$(597)	Other income (expense)	$—	$—
Treasury Rate Locks	$—	$—	Interest income (expense)	$321	$320	Other income (expense)	$—	$—
Income Tax (Benefit) Expense	$—	$—	Income Tax (Benefit) Expense	$2,031	$—	Income Tax (Benefit) Expense	$—	$—

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Benefit Plans (Tables)

12 Months Ended

Sep. 28, 2013

Share-based Compensation [Abstract]

Schedule Of Stock Option And Stock Appreciation Rights Activity

A summary of the Company’s stock option and SAR activity follows:

	Number of Options/SARs (in thousands)		Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)
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
Granted	518		30.24
Cancelled	(105	)	34.44
Exercised	(561	)	22.36
Outstanding as of September 29, 2012	3,071		$	28.86
Granted	515		27.66
Cancelled	(141	)	25.48
Exercised	(380	)	22.00
Outstanding as of September 28, 2013	3,065		$	29.27	$	25,547

	Number of Options/SARs (in thousands)	Weighted Average Exercise Price		Aggregate Intrinsic Value(in thousands)
Exercisable as of:
October 1, 2011	2,383	$	26.38
September 29, 2012	2,327	$	28.32
September 28, 2013	2,375	$	29.49	$	19,763

Schedule Of Stock Option And Stock Appreciation Rights Information

The following table summarizes outstanding stock option and SAR information as of September 28, 2013 (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
$12.94 - $19.41	278	$	14.75	3.0	278	$	14.75
$19.42 - $29.12	1,269	$	25.02	6.2	804	$	24.43
$29.13 - $42.52	1,518	$	35.48	5.3	1,293	$	35.81
$12.94 - $42.52	3,065	$	29.27	5.5	2,375	$	29.49

Schedule Of Estimated Option Grants Using Black-Scholes Pricing Model

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:

	2013	2012	2011
Expected life (years)	4.40 - 5.00	4.40 - 5.00	4.40 - 5.00
Risk-free interest rate	0.57 - 2.71%	0.57 - 1.09%	1.03 - 2.17%
Expected volatility	45 - 51%	50 - 51%	49 - 50%
Dividend yield	—	—	—

Schedule Of Restricted Stock Unit And Stock Awards Activity

A summary of the Company’s RSUs and SAs activity follows:

	Number of Shares (in thousands)		Weighted Average Fair Value at Date of Grant		Aggregate     Intrinsic Value     (in thousands)
Units outstanding as of October 2, 2010	385		$	26.90
Granted	155		27.14
Canceled	(18	)	25.92
Vested	(98	)	31.27
Units outstanding as of October 1, 2011	424		$	26.02
Granted	268		36.68
Canceled	(26	)	33.12
Vested	(200	)	25.98
Units outstanding as of September 29, 2012	466		$	31.78
Granted	329		26.16
Canceled	(47	)	31.26
Vested	(94	)	26.59
Units outstanding as of September 28, 2013	654		$	29.73	$	24,140

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Guarantees (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Limited warranty liability, beginning balance	$ 5,145	$ 5,453
Accruals for warranties issued during the period	1,168	649
Settlements (in cash or in kind) during the period	(371)	(957)
Limited warranty liability, ending balance	$ 5,942	$ 5,145
Minimum [Member]
Product warranty specification period, months	12
Maximum [Member]
Product warranty specification period, months	24

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Description Of Business And Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
	Sep. 28, 2013 Rate	Sep. 29, 2012 Rate	Oct. 01, 2011 Rate
Number of branded product companies	140
Percentage of net sales	5.00%	5.00%	5.00%
Exchange (losses) gains on foreign currency transactions	$ (1,200,000)	$ 200,000	$ 1,000,000
Fair value of capital lease obligations	12,200,000	13,700,000
Fair value of long-term debt	246,800,000	256,800,000
Interest Rate Swap And Forward Contract [Member]
Interest rate swaps and forward contracts treated as cash flow hedges and recorded in accumulated other comprehensive income	(2,700,000)	6,800,000	(400,000)
Long-Term Deferred Income Tax Liabilities [Member]
Prior Period Reclassification Adjustment		$ 3,300,000

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Reportable Segments, Geographic Information And Major Customers (Percentages Of Accounts Receivable From Customers) (Details)	Sep. 28, 2013 Rate
Percentage of accounts receivable from major customer	0.00%

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Income Taxes (Schedule Of Income Tax Expense (Benefit) (Details) (USD $)	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction [Abstract]
Current Federal	$ 408,000
Current State		131,000	3,000
Current Foreign	4,089,000	5,253,000	5,872,000
Current Total	4,497,000	5,384,000	5,875,000
Deferred Federal	(3,702,000)	18,950,000	(1,649,000)
Deferred State	(42,000)	4,784,000	(484,000)
Deferred Foreign	1,971,000	24,000	(895,000)
Deferred Total	(1,773,000)	23,758,000	(3,028,000)
Income tax expense	2,724,000	29,142,000	2,847,000
Valuation Allowance, Deferred Tax Asset, Change in Amount	$ 7,000,000	$ 24,100,000
Income Tax Holiday, Income Tax Benefits Per Share	$ 0.66	$ 0.50	$ 0.57

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Derivatives And Fair Value Measurements (Schedule Of Fair Values Of Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 29, 2012 Interest Rate Swaps [Member]	Sep. 28, 2013 Derivatives Designated As Hedging Instruments [Member] Prepaid Expenses And Other [Member] Interest Rate Swaps [Member]	Sep. 29, 2012 Derivatives Designated As Hedging Instruments [Member] Prepaid Expenses And Other [Member] Forward Contracts [Member]	Sep. 29, 2012 Derivatives Designated As Hedging Instruments [Member] Current Liabilities - Other [Member] Interest Rate Swaps [Member]	Sep. 28, 2013 Derivatives Designated As Hedging Instruments [Member] Current Liabilities - Other [Member] Forward Contracts [Member]
Interest Rate Cash Flow Hedge Asset at Fair Value		$ 34
Interest Rate Cash Flow Hedge Liability at Fair Value	(1,715)			1,715
Foreign Currency Contract, Asset, Fair Value Disclosure			1,095
Foreign Currency Contracts, Liability, Fair Value Disclosure					$ 999

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Debt, Capital Lease Obligations And Other Financing (Narrative) (Details) (USD $)	12 Months Ended					12 Months Ended										12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011	Sep. 28, 2013 New Credit Facility [Member]	May 15, 2012 New Credit Facility [Member]	Sep. 28, 2013 Revolving Loans New Credit Facility [Member]	Sep. 28, 2013 Term Loans New Credit Facility [Member] Rate	Sep. 29, 2012 Term Loans New Credit Facility [Member]	May 15, 2012 Term Loans New Credit Facility [Member]	Sep. 28, 2013 Increase Option [Member]	May 15, 2012 Term Loans Prior Credit Facility [Member]	Apr. 04, 2008 Term Loans Prior Credit Facility [Member]	May 15, 2012 Revolving Loans Prior Credit Facility [Member]	Sep. 28, 2013 Senior Notes [Member] Rate	Sep. 29, 2012 Senior Notes [Member]	Sep. 28, 2013 Minimum [Member] Rate
Line of Credit Facility, Current Borrowing Capacity					$ 250,000,000	$ 160,000,000			$ 90,000,000				$ 100,000,000
Line Of Credit Facility Maximum Borrowing Capacity						260,000,000				100,000,000
Credit facility outstanding at end of period								82,500,000			90,000,000	150,000,000
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	1.00%
Principal repayments of term loan							3,750,000
Balloon repayment							75,000,000
LIBOR rate plus							1.125%									1.13%
Rate of current fee						0.20%
Deferred Finance Costs, Gross				900,000
Debt instrument interest rate														5.20%
Senior Notes														175,000,000	175,000,000
Debt Instrument, Interest Rate Terms							LIBOR + 1.125%
Cash paid for interest	$ 12,900,000	$ 16,400,000	$ 8,600,000

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Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012
Current assets:
Cash and Cash Equivalents, at Carrying Value	$ 341,865	$ 297,619
Accounts receivable, net of allowances of $1,008 and $1,011, respectively	305,350	323,210
Inventories	404,020	457,691
Deferred income taxes	3,917	5,500
Prepaid expenses and other	23,870	15,785
Total current assets	1,079,022	1,099,805
Property, Plant and Equipment, Net	325,061	265,191
Deferred income taxes	2,510	4,335
Other Assets, Noncurrent	41,091	42,136
Total assets	1,447,684	1,411,467
Current liabilities:
Long-term Debt and Capital Lease Obligations, Current	3,574	10,211
Accounts payable	313,404	341,276
Customer deposits	69,295	36,384
Accrued liabilities:
Salaries and wages	42,553	45,450
Other	42,550	46,550
Total current liabilities	471,376	479,871
Long-term Debt and Capital Lease Obligations	257,773	260,211
Deferred Tax Liabilities, Net, Noncurrent	2,128	3,268
Other Liabilities, Noncurrent	17,106	19,095
Total non-current liabilities	277,007	282,574
Shareholders' equity:
Preferred stock, $.01 par value, 5,000 shares authorized, none issued or outstanding	0	0
Common stock, $.01 par value, 200,000 shares authorized, 49,176 and 48,851 shares issued, respectively, and 33,600 and 35,097 shares outstanding, respectively	492	489
Additional Paid in Capital	449,368	435,546
Common stock held in treasury, at cost, 15,576 and 13,754 shares, respectively	(449,968)	(400,110)
Retained Earnings (Accumulated Deficit)	679,172	596,913
Accumulated Other Comprehensive Income (Loss), Net of Tax	20,237	16,184
Total shareholders' equity	699,301	649,022
Total liabilities and shareholders' equity	$ 1,447,684	$ 1,411,467

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Earnings Per Share

12 Months Ended

Sep. 28, 2013

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

The following is a reconciliation of the amounts utilized in the computation of basic and diluted earnings per share for fiscal 2013, 2012 and 2011 (in thousands, except per share amounts):

	2013		2012		2011
Earnings:
Net income	$	82,259	$	62,089	$	89,256
Basic weighted average common shares outstanding	34,330		34,874		38,063
Dilutive effect of share-based awards outstanding	562		655		737
Diluted weighted average shares outstanding	34,892		35,529		38,800
Earnings per share:
Basic	$	2.40	$	1.78	$	2.34
Diluted	$	2.36	$	1.75	$	2.30

In fiscal 2013, 2012 and 2011, stock options and stock-settled stock appreciation rights (‘SARs”) to purchase approximately 1.9 million, 1.4 million and 1.3 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 the Company's common shares and, therefore, their effect would be antidilutive.

Outstanding shares have decreased in recent years as a result of the Company's stock repurchase programs. Refer to Note 14, "Shareholders' Equity" for further information on the Company's stock repurchase programs.

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Consolidated Statements Of Shareholder's Equity And Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Stockholders' Equity at Period Start at Oct. 02, 2010	$ 651,855	$ 478	$ 399,054	$ (200,110)	$ 445,568	$ 6,865
Common Stock, Shares, Outstanding at Period Start at Oct. 02, 2010		40,403,000
Comprehensive income:
Net Income (Loss) Attributable to Parent	89,256				89,256
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	1,671
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,264
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(407)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	90,520
Treasury shares purchased, value	(200,000)			(200,000)
Treasury shares purchased, shares		(6,308,000)
Stock-based compensation expense	11,041		11,041
Exercise of stock options, including tax benefits, shares		449,000
Exercise of stock options, including tax benefits, value	5,466	5	5,461
Stockholders' Equity at Period End at Oct. 01, 2011	558,882	483	415,556	(400,110)	534,824	8,129
Common Stock, Shares, Outstanding at Period End at Oct. 01, 2011		34,544,000
Comprehensive income:
Net Income (Loss) Attributable to Parent	62,089				62,089
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	1,234
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	8,055
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	6,821
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	70,144
Stock-based compensation expense	12,535		12,535
Exercise of stock options, including tax benefits, shares		553,000
Exercise of stock options, including tax benefits, value	7,461	6	7,455
Stockholders' Equity at Period End at Sep. 29, 2012	649,022	489	435,546	(400,110)	596,913	16,184
Common Stock, Shares, Outstanding at Period End at Sep. 29, 2012	35,097,000	35,097,000
Comprehensive income:
Net Income (Loss) Attributable to Parent	82,259				82,259
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	6,754
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,053
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(2,701)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	86,312
Treasury shares purchased, value	(49,858)			(49,858)
Treasury shares purchased, shares		(1,822,000)
Stock-based compensation expense	11,782		11,782
Exercise of stock options, including tax benefits, shares		325,000
Exercise of stock options, including tax benefits, value	2,043	3	2,040
Stockholders' Equity at Period End at Sep. 28, 2013	$ 699,301	$ 492	$ 449,368	$ (449,968)	$ 679,172	$ 20,237
Common Stock, Shares, Outstanding at Period End at Sep. 28, 2013	33,600,000	33,600,000

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Income Taxes (Schedule Of Reconciliation Of Beginning And Ending Amounts Of Unrecognized Income Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Income Tax Disclosure [Abstract]
Balance at beginning	$ 7,603	$ 7,360
Gross increases for tax positions of prior years	189	243
Gross decreases for tax positions of prior years	356
Balance at ending	$ 7,436	$ 7,603

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Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Income Statement [Abstract]
Revenue, Net	$ 2,228,031	$ 2,306,732	$ 2,231,232
Cost of sales	2,014,846	2,086,819	2,016,490
Gross profit	213,185	219,913	214,742
Operating expenses:
Selling, General and Administrative Expense	116,562	115,754	113,563
Operating income	96,623	104,159	101,179
Other income (expense):
Interest expense	(12,638)	(16,064)	(11,649)
Investment Income, Interest	1,640	1,761	1,367
Miscellaneous income (expense)	(642)	1,375	1,206
Income before income taxes	84,983	91,231	92,103
Income tax expense (benefit)	2,724	29,142	2,847
Net income	82,259	62,089	89,256
Earnings per share:
Earnings Per Share, Basic	$ 2.40	$ 1.78	$ 2.34
Earnings Per Share, Diluted	$ 2.36	$ 1.75	$ 2.30
Weighted average shares outstanding:
Basic	34,330	34,874	38,063
Diluted	34,892	35,529	38,800
Treasury shares purchased, value	(49,858)		(200,000)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(2,701)	6,821	(407)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	6,754	1,234	1,671
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,053	8,055	1,264
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 86,312	$ 70,144	$ 90,520

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Derivatives And Fair Value Measurements (Schedule Of The Effect Of Derivative Instruments On The Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012
Interest Rate Swaps [Member]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective Portion)	$ 961	$ (40)
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	2,000
Foreign Currency Forward Contracts [Member]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective Portion)	(1,389)	3,021
Income Tax (Benefit) Expense [Member]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	2,031
Interest Income (Expense) [Member] | Treasury Rate Locks [Member]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	321	320
Selling And Administrative Expenses [Member] | Foreign Currency Forward Contracts [Member]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	709	(597)
Interest Expense [Member] | Interest Rate Swaps [Member]
Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	$ (788)	$ (3,564)

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Income Taxes (Tables)

12 Months Ended

Sep. 28, 2013

Income Tax Disclosure [Abstract]

Schedule Of Domestic And Foreign Components Of Income (Loss) Before Income Taxes

The domestic and foreign components of income (loss) before income taxes for fiscal 2013, 2012 and 2011 consisted of (in thousands):

	2013			2012		2011
U.S.	$	(8,406	)	$	8,371	$	(9,449	)
Foreign	93,389			82,860		101,552
	$	84,983		$	91,231	$	92,103

Schedule Of Income Tax Expense (Benefit)

Income tax expense (benefit) for fiscal 2013, 2012 and 2011 consisted of (in thousands):

	2013			2012		2011
Current:
Federal	$	408		$	—	$	—
State	—			131		3
Foreign	4,089			5,253		5,872
	4,497			5,384		5,875
Deferred:
Federal	(3,702		)	18,950		(1,649		)
State	(42		)	4,784		(484		)
Foreign	1,971			24		(895		)
	(1,773		)	23,758		(3,028		)
	$	2,724		$	29,142	$	2,847

Schedule Of Reconciliation Of Federal Statutory Income Tax Rate To Effective Income Tax Rates

The following is a reconciliation of the federal statutory income tax rate to the effective income tax rates reflected in the Consolidated Statements of Comprehensive Income for fiscal 2013, 2012 and 2011:

	2013		2012		2011
Federal statutory income tax rate	35.0	%	35.0	%	35.0	%
Increase (decrease) resulting from:
Permanent differences	—		—		—
State income taxes, net of federal income tax	—		0.2		(0.3	)
Foreign tax rate differences	(34.4	)	(27.5	)	(34.5	)
Valuation reserve for deferred tax assets	5.8		26.5		1.4
Other, net	(3.2	)	(2.3	)	1.5
Effective income tax rate	3.2	%	31.9	%	3.1	%

Schedule Of Components Of Net Deferred Income Tax Asset

The components of the net deferred income tax asset as of September 28, 2013 and September 29, 2012, consisted of (in thousands):

	2013			2012
Deferred income tax assets:
Loss/credit carryforwards	$	12,985		$	12,175
Goodwill	1,268			2,024
Inventories	4,997			4,870
Accrued benefits	19,428			17,768
Allowance for bad debts	339			322
Interest rate swaps	—			664
Other	3,304			4,735
Total gross deferred income tax assets	42,321			42,558
Less valuation allowance	(34,075		)	(27,087		)
Deferred income tax assets	8,246			15,471
Deferred income tax liabilities:
Property, plant and equipment	3,934			7,404
Other	13			1,500
Deferred income tax liabilities	3,947			8,904
Net deferred income tax asset	$	4,299		$	6,567

Schedule Of Reconciliation Of Beginning And Ending Amounts Of Unrecognized Income Tax Benefits

Presented below is a reconciliation of the beginning and ending amounts of unrecognized income tax benefits (in thousands):

Balance at beginning of fiscal 2012	$	7,360
Gross increases for tax positions of prior years	243
Gross increases for tax positions of the current year	—
Gross decreases for tax positions of prior years	—
Settlements	—
Balance at beginning of fiscal 2013	$	7,603
Gross increases for tax positions of prior years	189
Gross increases for tax positions of the current year	—
Gross decreases for tax positions of prior years	356
Settlements	—
Balance at September 28, 2013	$	7,436

Schedule Of Major Tax Jurisdictions

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:

Jurisdiction	Fiscal Years
China	2008-2013
Germany	2009-2013
Mexico	2006-2013
Romania	2009-2013
United Kingdom	2007-2013
United States
Federal	2007-2013
State	2001-2013

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Description Of Business And Significant Accounting Policies (Policy)

12 Months Ended

Sep. 28, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description Of Business

Description of Business:  Plexus Corp. and its subsidiaries (together “Plexus” or the “Company”) participate in the Electronic Manufacturing Services (“EMS”) industry. Plexus delivers 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"), Europe, Middle East, and Africa ("EMEA"), and Asia-Pacific ("APAC") regions. Customer service is provided to over 140 branded product companies in the Networking/Communications, Healthcare/Life Sciences, Industrial/Commercial and Defense/Security/Aerospace market sectors. The Company's 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 the Company's customers’ products require complex configuration management and direct order fulfillment to their customers across the globe. In such cases Plexus provides global logistics management and after-market service and repair. The Company's customers’ products may have stringent requirements for quality, reliability and regulatory compliance. Plexus offers its 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

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. The accounting years for fiscal 2013, 2012 and 2011 each included 364 days.

The Company’s reportable segments consist of the AMER, APAC and EMEA segments. Refer to Note 12, "Reportable Segments, Geographic Information and Major Customers," for further details on reportable segments.

Cash Equivalents And Short-Term Investments

Cash and Cash Equivalents:  Cash equivalents are highly liquid investments purchased with an original maturity of less than three months and are classified as Level 1 in the fair level hierarchy described below. As of September 28, 2013 and September 29, 2012, cash and cash equivalents were the following (in thousands):

	2013		2012
Cash	$	157,988	$	124,648
Money market funds and other	183,877		172,971
	$	341,865	$	297,619

Inventories

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

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:

Buildings and improvements	15-50 years
Machinery and equipment	3-10 years
Computer hardware and software	3-10 years

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 4, "Property, Plant and Equipment") 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. This includes costs of both the software and the 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.

Expenditures for maintenance and repairs are expensed as incurred.

Impairment Of Long-Lived Assets

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 and intangible assets with finite lives include reduced expectations for future performance or industry demand and possible further restructurings, among others.

Revenue Recognition

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 for each of fiscal 2013, 2012 and 2011.

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

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 7, "Income Taxes"). Realization of deferred income tax assets in each of the Company's tax jurisdictions is dependent on the Company’s ability to generate future taxable income in these jurisdictions. 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

Foreign Currency Translation:  The Company translates 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. The Company translates 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 Consolidated Statements of Comprehensive Income as a component of miscellaneous income (expense). Exchange (losses) gains on foreign currency transactions were $(1.2) million, $0.2 million, and $1.0 million for fiscal 2013, 2012 and 2011, respectively.

Derivatives

Derivatives:  All derivatives are recognized on the balance sheet at their fair market value. The Company periodically enters into forward currency exchange contracts and interest rate swaps. 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. The Company's interest rate swaps and certain forward currency exchange contracts are treated as cash flow hedges and, therefore, $(2.7) million, $6.8 million and $(0.4) million were recorded in “Accumulated other comprehensive income” for fiscal 2013, 2012 and 2011, respectively.

Grants from Government Authorities [Policy Text Block]

Grants from Government Authorities: Grants from governments are recognized at their fair value where there is reasonable assurance that the grant funds will be received and the Company will comply with all attached conditions to the grant.

Government grants relating to property, plant and equipment are recorded as an offset to the carrying value of the related assets at the time of capitalization. Government grants relating to other costs incurred are recognized as an offset to those related costs, for which the grants are intended to compensate for, at the time they are recognized.

Earnings Per Share

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

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 Comprehensive Income over the service period (generally the vesting period) of the grant.

Comprehensive Income

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 September 28, 2013 and September 29, 2012 (in thousands):

	2013		2012
Foreign currency translation adjustments	$	19,448	$	12,694
Cumulative change in fair market value of derivative instruments, net of tax	789		3,490
Accumulated other comprehensive income	$	20,237	$	16,184

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 6, "Derivatives and Fair Value Measurements."

Conditional Asset Retirement Obligations

Conditional Asset Retirement Obligations:  The Company recognizes 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

Use of Estimates:  The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America ("GAAP") 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

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 $12.2 million and $13.7 million as of September 28, 2013 and September 29, 2012, respectively. The fair value of the Company’s long-term debt was $246.8 million and $256.8 million as of September 28, 2013 and September 29, 2012, respectively. The Company uses quoted market prices when available or discounted cash flows to calculate fair value. If measured at fair value in the financial statements, long-term debt and capital lease obligations (including the current portion) would be classified as Level 2 in the fair value hierarchy described below. The fair values of the Company’s derivatives are disclosed in Note 6, "Derivatives and Fair Value Measurements."

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

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 12, "Reportable Segments, Geographic Information and Major Customers." The Company, at times, requires advanced cash deposits for services performed. The Company also closely monitors extensions of credit.

New Accounting Pronouncements, Policy [Policy Text Block]

New Accounting Pronouncements:  In July 2013, the Financial Accounting Standards Board (“FASB”) issued new guidance for unrecognized tax benefits that exist along with a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The guidance requires an entity to present an unrecognized tax benefit as a reduction of a deferred tax asset for an net operating loss ("NOL") carryforward, or similar tax loss or tax credit carryforward, rather than as a liability when (1) the uncertain tax position would reduce the NOL or other carryforward under the tax law of the applicable jurisdiction and (2) the entity intends to use the deferred tax asset for that purpose. This guidance is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. Early adoption and retrospective application are permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

In July 2013, the FASB issued amended guidance that permits the Fed Funds Effective Swap Rate ("OIS") to be used as a U.S. benchmark interest rate for hedge accounting purposes, in addition to Treasury obligations of the U.S. government ("UST") and the London Interbank Offered Rate ("LIBOR"). The amendments also remove the restriction on using different benchmark rates for similar hedges. This update is effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements or results of operations.

In March 2013, the FASB issued amended guidance for cumulative translation adjustments upon derecognition of certain subsidiaries or groups of assets within a foreign entity or of an investment in a foreign entity. These amendments provide guidance on releasing cumulative translation adjustments when a reporting entity ceases to have a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity.  In addition, these amendments provide guidance on the release of cumulative translation adjustment in partial sales of equity method investments and in step acquisitions.  The amendments are effective on a prospective basis for fiscal years and interim reporting periods within those years, beginning after December 15, 2013. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

In February 2013, the FASB issued guidance that requires entities to present the changes in the components of accumulated other comprehensive income. Entities are required to present separately the amount of the change that is due to reclassifications, and the amount that is due to current period other comprehensive income. These changes may be shown before or net of tax, and displayed either on the face of the financial statements or in the footnotes. Public entities are required to comply with the standard for annual and interim periods starting with the first interim period in the fiscal period beginning after December 15, 2012. The Company adopted this guidance as of the second fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.

In January 2013, the FASB issued a clarification of its previous amendment to disclosures about offsetting assets and liabilities. The clarification stated which instruments and transactions are subject to the original amendment requiring an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effects of those arrangements on its financial position. Public entities are required to apply the amendment for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by those amendments retrospectively for all comparative periods presented. This guidance will be effective for the Company's 2014 fiscal year and is not expected to have an impact on the Company's consolidated financial position, results of operations or cash flows, as the guidance only relates to the presentation of the Company's financial statement disclosures.

In June 2011, the FASB issued an amendment to comprehensive income guidance, which eliminates the option to present other comprehensive income 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. This guidance is effective for financial statements issued for fiscal years, and interim periods within those years, beginning after December 15, 2011. The Company adopted this guidance as of the first fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.

Reclassification, Policy [Policy Text Block]

Reclassifications: Long-term deferred income tax liabilities in fiscal 2012, in the amount of $3.3 million, were reclassified from short-term deferred income tax assets to conform to current year presentation on the Consolidated Balance Sheets.

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Property, Plant And Equipment (Schedule Of Property, Plant And Equipment) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012
Land, buildings and improvements	$ 212,195	$ 170,557
Machinery and equipment	312,941	295,548
Computer hardware and software	91,565	85,433
Construction in progress	67,518	39,894
Property, plant and equipment, gross	684,219	591,432
Less: accumulated depreciation	359,158	326,241
Property, plant and equipment, net	325,061	265,191
Assets Held Under Capital Leases [Member]
Buildings and improvements	23,147	23,009
Machinery and equipment	3,294	1,873
Property, plant and equipment, gross	26,441	24,882
Less: accumulated depreciation	16,513	13,909
Property, plant and equipment, net	$ 9,928	$ 10,973

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Income Taxes (Schedule Of Domestic And Foreign Components Of Income (Loss) Before Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
U.S.	$ (8,406)	$ 8,371	$ (9,449)
Foreign	93,389	82,860	101,552
Income before income taxes	$ 84,983	$ 91,231	$ 92,103

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Benefit Plans (Schedule Of Estimated Option Grants Using Black-Scholes Pricing Model) (Details)	12 Months Ended
	Sep. 28, 2013 Rate	Sep. 29, 2012 Rate	Oct. 01, 2011 Rate
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate, Minimum	0.57%	0.57%	1.03%
Risk-free interest rate, Maximum	2.71%	1.09%	2.17%
Expected volatility, Minimum	45.00%	50.00%	49.00%
Expected volatility, Maximum	51.00%	51.00%	50.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years), Minimum	4 years 4 months 24 days	4 years 4 months 24 days	4 years 4 months 24 days
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years), Minimum	5 years	5 years	5 years

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Description of Business And Significant Accounting Policies (Schedule of Property, Plant And Equipment, Useful Lives) (Details)	12 Months Ended
	Sep. 28, 2013
Buildings And Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Buildings And Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	50 years
Machinery And Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Machinery And Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Computer Hardware And Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Computer Hardware And Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years

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Quarterly Financial Data (Tables)

12 Months Ended

Sep. 28, 2013

Quarterly Financial Data [Abstract]

Schedule Of Quarterly Financial Data

Summarized quarterly financial data for fiscal 2013 and 2012 consisted of (in thousands, except per share amounts):

2013	First Quarter		Second Quarter		Third Quarter		Fourth Quarter			Total
Net sales	$	530,532	$	557,824	$	571,945	$	567,730		$	2,228,031
Gross profit	51,162		52,021		55,473		54,529			213,185
Net income	16,616		17,975		23,204		24,464			82,259
Earnings per share (1):
Basic	$	0.48	$	0.52	$	0.69	$	0.73		$	2.40
Diluted	$	0.47	$	0.52	$	0.68	$	0.71	(2)	$	2.36
2012	First Quarter		Second Quarter		Third Quarter		Fourth Quarter			Total
Net sales	$	529,654	$	573,470	$	608,819	$	594,789		$	2,306,732
Gross profit	51,652		54,624		57,393		56,244			219,913
Net income	17,870		19,958		23,533		728		*	62,089
Earnings per share (1):
Basic	$	0.52	$	0.57	$	0.67	$	0.02		$	1.78
Diluted	$	0.51	$	0.56	$	0.66	$	0.02		$	1.75

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Valuation And Qualifying Accounts (Tables)

12 Months Ended

Sep. 28, 2013

Valuation and Qualifying Accounts [Abstract]

Schedule Of Valuation And Qualifying Accounts

For the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011 (in thousands):

Descriptions	Balance at beginning of period		Additions charged to costs and expenses		Additions charged to other accounts		Deductions			Balance at end of period
Fiscal Year 2013:
Allowance for losses on accounts receivable (deducted from the asset to which it relates)	$	1,011	$	1,036	$	—	$	1,039	*	$	1,008
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)	$	27,087	$	6,988	$	—	$	—		$	34,075
Fiscal Year 2012:
Allowance for losses on accounts receivable (deducted from the asset to which it relates)	$	3,256	$	259	$	—	$	2,504	*	$	1,011
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)	$	5,116	$	21,971	$	—	$	—		$	27,087
Fiscal Year 2011:
Allowance for losses on accounts receivable (deducted from the asset to which it relates)	$	1,400	$	1,863	$	—	$	7		$	3,256
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)	$	2,548	$	1,238	$	1,330	$	—		$	5,116
* Amount represents favorable resolution of amounts previously reserved for at the end of the prior year and amounts written off.

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Income Taxes

12 Months Ended

Sep. 28, 2013

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The domestic and foreign components of income (loss) before income taxes for fiscal 2013, 2012 and 2011 consisted of (in thousands):

	2013			2012		2011
U.S.	$	(8,406	)	$	8,371	$	(9,449	)
Foreign	93,389			82,860		101,552
	$	84,983		$	91,231	$	92,103

Income tax expense (benefit) for fiscal 2013, 2012 and 2011 consisted of (in thousands):

	2013			2012		2011
Current:
Federal	$	408		$	—	$	—
State	—			131		3
Foreign	4,089			5,253		5,872
	4,497			5,384		5,875
Deferred:
Federal	(3,702		)	18,950		(1,649		)
State	(42		)	4,784		(484		)
Foreign	1,971			24		(895		)
	(1,773		)	23,758		(3,028		)
	$	2,724		$	29,142	$	2,847

The following is a reconciliation of the federal statutory income tax rate to the effective income tax rates reflected in the Consolidated Statements of Comprehensive Income for fiscal 2013, 2012 and 2011:

	2013		2012		2011
Federal statutory income tax rate	35.0	%	35.0	%	35.0	%
Increase (decrease) resulting from:
Permanent differences	—		—		—
State income taxes, net of federal income tax	—		0.2		(0.3	)
Foreign tax rate differences	(34.4	)	(27.5	)	(34.5	)
Valuation reserve for deferred tax assets	5.8		26.5		1.4
Other, net	(3.2	)	(2.3	)	1.5
Effective income tax rate	3.2	%	31.9	%	3.1	%

The Company recorded income tax expense of $2.7 million, $29.1 million and $2.8 million for fiscal 2013, 2012 and 2011, respectively.

The effective tax rate for fiscal 2013 was significantly lower than that of fiscal 2012 but comparable to the fiscal 2011 rate. The increase to the income tax expense recorded in fiscal 2012 as compared to the other periods presented was the result of the Company recording an additional valuation allowance against the U.S. deferred tax assets in fiscal 2012. During the preparation of the fiscal 2012 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 U.S. deferred tax assets, consistent with the provisions of ASC Topic 740, “Income Taxes.” Accordingly, the Company, based on the weight of the available positive and negative evidence, established an additional valuation allowance against the U.S. deferred tax assets, impacting the tax provision by $22.8 million. The total valuation allowance impacting the tax provision for fiscal 2012 was $24.1 million, comprised of the $22.8 million valuation allowance for the U.S. and an additional $1.3 million for operating losses in Germany and Romania.

During the fourth quarter of fiscal 2013, the Company identified and recorded a discrete tax adjustment and placed a full valuation allowance on the net deferred tax assets of the Company's U.K. operations, increasing tax expense by $1.8 million ($0.05 per diluted share). The Company's analysis found that in the fourth quarter, its U.K. operations experienced an unanticipated material decline in sales resulting in a loss in fiscal 2013, which is forecasted to continue into fiscal 2014. While the Company's U.K. operations are expected to regain profitability, the current, forecasted and cumulative losses are substantial negative evidence. Having examined the evidence, both positive and negative, it was determined that it is more likely than not that these deferred tax assets will not be utilized and should have a valuation allowance placed against them.

In the fourth quarter of fiscal 2013 the Company identified and recorded several out-of-period tax errors related to prior fiscal periods that reduced tax expense by $3.2 million ($0.09 per diluted share). These out-of-period adjustments are reflected in the Other, net line of the effective income tax rate schedule above. The Company believes these out-of-period tax errors were not material to the fiscal 2013, or previously issued, financial statements.

The components of the net deferred income tax asset as of September 28, 2013 and September 29, 2012, consisted of (in thousands):

	2013			2012
Deferred income tax assets:
Loss/credit carryforwards	$	12,985		$	12,175
Goodwill	1,268			2,024
Inventories	4,997			4,870
Accrued benefits	19,428			17,768
Allowance for bad debts	339			322
Interest rate swaps	—			664
Other	3,304			4,735
Total gross deferred income tax assets	42,321			42,558
Less valuation allowance	(34,075		)	(27,087		)
Deferred income tax assets	8,246			15,471
Deferred income tax liabilities:
Property, plant and equipment	3,934			7,404
Other	13			1,500
Deferred income tax liabilities	3,947			8,904
Net deferred income tax asset	$	4,299		$	6,567

During fiscal 2013, the Company’s valuation allowance increased by $7.0 million as a result of increases to the valuation allowance against the net deferred tax assets in the U.S. of $2.4 million, the net deferred tax assets in the U.K. of $2.4 million, the net deferred tax assets in Romania of $0.9 million, the net deferred tax assets in Germany of $1.0 million and the net deferred tax assets in China of $0.3 million.

As of September 28, 2013, the Company had approximately $81.6 million of state net operating loss carryforward that expires between fiscal 2014 and 2032, which also has a full valuation allowance against it.

As a result of using the with-and-without method under the requirements for accounting for stock-based compensation, the Company has unrecognized net operating loss carryforward of $2.6 million related to tax deductions in excess of compensation expense for stock options until such time as the related deductions actually reduce income taxes payable.

Cash paid for income taxes in fiscal 2013 and 2012 was $5.3 million and $9.0 million, respectively. Cash refunded for income taxes in fiscal 2011 was $2.2 million.

During the fiscal year ended September 28, 2013, tax legislation was adopted in various jurisdictions. None of these changes are expected to have a material impact on the Company's consolidated financial condition, results of operations or cash flows.

The Company has been granted tax holidays for its Malaysian and Xiamen, China subsidiaries. These tax holidays expire in fiscal 2024 and 2014, respectively, and are subject to certain conditions with which the Company expects to comply. In fiscal 2013, 2012 and 2011, these subsidiaries generated income, which resulted in tax reductions of approximately $22.7 million ($0.66 per basic share), $17.5 million ($0.50 per basic share) and $21.7 million ($0.57 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 permanently reinvested. The aggregate undistributed earnings of the Company’s foreign subsidiaries for which a deferred income tax liability has not been recorded was approximately $567.3 million as of September 28, 2013. If such earnings were repatriated, additional tax expense may result, although the calculation of such additional taxes is not practicable at this time.

The Company has approximately $7.4 million of uncertain tax benefits as of September 28, 2013. 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):

Balance at beginning of fiscal 2012	$	7,360
Gross increases for tax positions of prior years	243
Gross increases for tax positions of the current year	—
Gross decreases for tax positions of prior years	—
Settlements	—
Balance at beginning of fiscal 2013	$	7,603
Gross increases for tax positions of prior years	189
Gross increases for tax positions of the current year	—
Gross decreases for tax positions of prior years	356
Settlements	—
Balance at September 28, 2013	$	7,436

Approximately $5.3 million and $6.5 million of the balance as of September 28, 2013 and September 29, 2012, respectively, 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 $1.1 million, $0.9 million and $0.7 million as of September 28, 2013, September 29, 2012 and October 1, 2011, respectively. The Company recognized $0.2 million of expense for accrued penalties and net accrued interest in the Consolidated Statements of Comprehensive Income for the fiscal year ended September 28, 2013.

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 is currently under examination by taxing authorities in the U.S. for fiscal years 2008 through 2010. The U.S. examination may be resolved within the next twelve months, but at this time it is not possible to estimate the amount of the effects of any changes to the Company's previously recorded uncertain tax positions. Periodically, the Company's foreign operations are notified by local taxing authorities of an examination of current or prior period tax related filings. The Company is not aware of any material proposed adjustment that has not been reflected in the current financial statements.

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:

Jurisdiction	Fiscal Years
China	2008-2013
Germany	2009-2013
Mexico	2006-2013
Romania	2009-2013
United Kingdom	2007-2013
United States
Federal	2007-2013
State	2001-2013

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Benefit Plans (Narrative) (Details) (USD $)	12 Months Ended					12 Months Ended
	Sep. 28, 2013 Rate	Sep. 29, 2012	Oct. 01, 2011	Sep. 28, 2013 2008 Long-Term Incentive Plan [Member]	Feb. 28, 2008 2008 Long-Term Incentive Plan [Member]	Sep. 28, 2013 RSUs And SAs [Member]	Sep. 29, 2012 RSUs And SAs [Member]	Oct. 01, 2011 RSUs And SAs [Member]	Sep. 28, 2013 Employee Stock Option and Stock Appreciation Rights [Member]	Sep. 29, 2012 Employee Stock Option and Stock Appreciation Rights [Member]	Oct. 01, 2011 Employee Stock Option and Stock Appreciation Rights [Member]	Sep. 28, 2013 Employee Stock Option [Member]	Sep. 28, 2013 Employee Stock Option [Member] 2008 Long-Term Incentive Plan [Member]	Sep. 29, 2012 Employee Stock Option [Member] 2008 Long-Term Incentive Plan [Member]	Oct. 01, 2011 Employee Stock Option [Member] 2008 Long-Term Incentive Plan [Member]	Sep. 28, 2013 Stock Appreciation Rights (SARs) [Member]	Sep. 29, 2012 Stock Appreciation Rights (SARs) [Member]	Oct. 01, 2011 Stock Appreciation Rights (SARs) [Member]	Sep. 28, 2013 Stock Appreciation Rights (SARs) [Member] 2008 Long-Term Incentive Plan [Member]	Sep. 29, 2012 Stock Appreciation Rights (SARs) [Member] 2008 Long-Term Incentive Plan [Member]	Oct. 01, 2011 Stock Appreciation Rights (SARs) [Member] 2008 Long-Term Incentive Plan [Member]	Sep. 28, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 29, 2012 Restricted Stock Units (RSUs) [Member]	Oct. 01, 2011 Restricted Stock Units (RSUs) [Member]	Sep. 28, 2013 Restricted Stock Units (RSUs) [Member] 2008 Long-Term Incentive Plan [Member]	Sep. 29, 2012 Restricted Stock Units (RSUs) [Member] 2008 Long-Term Incentive Plan [Member]	Oct. 01, 2011 Restricted Stock Units (RSUs) [Member] 2008 Long-Term Incentive Plan [Member]	Sep. 28, 2013 Unrestricted Stock Awards (SAs) [Member] 2008 Long-Term Incentive Plan [Member]	Sep. 29, 2012 Unrestricted Stock Awards (SAs) [Member] 2008 Long-Term Incentive Plan [Member]	Oct. 01, 2011 Unrestricted Stock Awards (SAs) [Member] 2008 Long-Term Incentive Plan [Member]	Sep. 28, 2013 RSUs And SAs [Member]	Sep. 28, 2013 SERP Accounts [Member]	Sep. 29, 2012 SERP Accounts [Member]
Maximum employee contribution to the plan, percentage	4.00%
Company's contribution on savings plan	$ 6,600,000	$ 6,900,000	$ 5,800,000
Maximum number of shares authorized under the plan					5,500,000
Long-term cash awards				4,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period												2 years				2 years						3 years
Term of stock options												ten years				seven years
Granted, Number of Options/SARs									515,000	518,000	641,000		400,000	300,000	300,000				100,000	200,000	300,000				300,000	300,000	100,000	0	0	0
Compensation expense	11,800,000	12,500,000	11,000,000
Deferred tax benefit			3,700,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value									$ 11.88	$ 13.13	$ 13.40
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value						500,000	1,400,000	600,000	3,300,000	4,300,000	3,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period																	6,000	10,000				93,831	193,684	88,112
Total intrinsic value of options and SARs exercised									4,300,000	7,600,000	6,500,000
Unrecognized compensation cost									5,800,000																						10,700,000
Unrecognized compensation cost, weighted average period of recognition, years									1 year 3 months 21 days																						1 year 9 months 25 days
Term of deferred compensation agreements	15 years
Contributions to participants' SERP accounts	400,000	400,000	300,000
Assets	1,447,684,000	1,411,467,000																														9,100,000	7,700,000
Liabilities																																$ 5,600,000	$ 4,800,000

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Earnings Per Share (Tables)

12 Months Ended

Sep. 28, 2013

Earnings Per Share [Abstract]

Reconciliation Of Amounts Utilized In Computation Of Basic And Diluted Earnings Per Share

The following is a reconciliation of the amounts utilized in the computation of basic and diluted earnings per share for fiscal 2013, 2012 and 2011 (in thousands, except per share amounts):

	2013		2012		2011
Earnings:
Net income	$	82,259	$	62,089	$	89,256
Basic weighted average common shares outstanding	34,330		34,874		38,063
Dilutive effect of share-based awards outstanding	562		655		737
Diluted weighted average shares outstanding	34,892		35,529		38,800
Earnings per share:
Basic	$	2.40	$	1.78	$	2.34
Diluted	$	2.36	$	1.75	$	2.30

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Inventories (Details) (USD $)	Sep. 28, 2013	Sep. 29, 2012
Inventory, Net [Abstract]
Raw materials	$ 288,559,000	$ 337,657,000
Work-in-process	57,883,000	47,182,000
Finished goods	57,578,000	72,852,000
Inventory, net	404,020,000	457,691,000
Inventory [Line Items]
Customer deposits related to inventory	51,600,000	34,800,000
Juniper Networks [Member]
Inventory [Line Items]
Customer deposits related to inventory	$ 11,000,000

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Benefit Plans

12 Months Ended

Sep. 28, 2013

Share-based Compensation [Abstract]

Benefit Plans

Benefit Plans

401(k) Savings Plan: The Company’s 401(k) Retirement Plan covers all eligible U.S. employees. The Company matches employee contributions up to 4 percent of eligible earnings. The Company’s contributions for fiscal 2013, 2012 and 2011 totaled $6.6 million, $6.9 million and $5.8 million, respectively.

Stock-based Compensation Plans: 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 granted to executive officers, other officers and key employees 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. In fiscal 2013, the Committee began granting RSUs to non-employee directors; these RSUs generally fully vest on the first anniversary of the grant date, which is also the date as of which the underlying shares will be issued (unless further deferred).

The 2008 Plan replaced the shareholder-approved 2005 Equity Incentive Plan (the “2005 Plan”). The 2005 Plan terminated upon the approval of the 2008 Plan, except that outstanding awards continue until exercise, expiration or forfeiture.

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.

Options issued to the members of the Board of Directors in fiscal 2013, 2012 and 2011 vested immediately on the date of grant. SAs issued to members of the Board in fiscal 2012 and 2011 also vested immediately on the date of grant.

In fiscal 2013, under the 2008 Plan, the Company granted options to purchase 0.4 million shares of the Company’s common stock and 0.1 million stock-settled SARs. Additionally, the Committee made awards of RSUs for 0.3 million shares of common stock, and the Committee did not grant SAs for shares of common stock.

In fiscal 2012, under the 2008 Plan, the Company granted options to purchase 0.3 million shares of the Company’s common stock and 0.2 million stock-settled SARs. Additionally, the Committee made awards of RSUs for 0.3 million shares of common stock, and the Committee granted SAs for 6.0 thousand shares of common stock.

In fiscal 2011, under the 2008 Plan, the Company granted options to purchase 0.3 million shares of the Company’s common stock and 0.3 million stock-settled SARs. Additionally, the Committee made awards of RSUs for 0.1 million shares of common stock, and the Committee granted SAs for 10.0 thousand shares of common stock.

The Company recognized $11.8 million, $12.5 million and $11.0 million of compensation expense associated with stock options, SARs, RSUs and SAs for fiscal 2013, 2012 and 2011, respectively. No deferred tax benefits related to equity awards were recognized in fiscal 2013 or 2012. A related deferred tax benefit of $3.7 million was recognized for fiscal 2011.

A summary of the Company’s stock option and SAR activity follows:

	Number of Options/SARs (in thousands)		Weighted Average Exercise Price		Aggregate Intrinsic Value (in thousands)
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
Granted	518		30.24
Cancelled	(105	)	34.44
Exercised	(561	)	22.36
Outstanding as of September 29, 2012	3,071		$	28.86
Granted	515		27.66
Cancelled	(141	)	25.48
Exercised	(380	)	22.00
Outstanding as of September 28, 2013	3,065		$	29.27	$	25,547

	Number of Options/SARs (in thousands)	Weighted Average Exercise Price		Aggregate Intrinsic Value(in thousands)
Exercisable as of:
October 1, 2011	2,383	$	26.38
September 29, 2012	2,327	$	28.32
September 28, 2013	2,375	$	29.49	$	19,763

Included in the stock option and SAR activity table above are 0.1 million, 0.2 million and 0.3 million SARs, which were granted in fiscal 2013, 2012 and 2011, respectively.

The following table summarizes outstanding stock option and SAR information as of September 28, 2013 (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
$12.94 - $19.41	278	$	14.75	3.0	278	$	14.75
$19.42 - $29.12	1,269	$	25.02	6.2	804	$	24.43
$29.13 - $42.52	1,518	$	35.48	5.3	1,293	$	35.81
$12.94 - $42.52	3,065	$	29.27	5.5	2,375	$	29.49

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 SARs 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 granted for fiscal 2013, 2012 and 2011 were $11.88, $13.13 and $13.40, 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:

	2013	2012	2011
Expected life (years)	4.40 - 5.00	4.40 - 5.00	4.40 - 5.00
Risk-free interest rate	0.57 - 2.71%	0.57 - 1.09%	1.03 - 2.17%
Expected volatility	45 - 51%	50 - 51%	49 - 50%
Dividend yield	—	—	—

The fair value of options and SARs vested for fiscal 2013, 2012 and 2011 were $3.3 million, $4.3 million and $3.6 million, respectively.

For fiscal 2013, 2012 and 2011, the total intrinsic value of options and SARs exercised was $4.3 million, $7.6 million and $6.5 million, respectively.

As of September 28, 2013, there was $5.8 million of unrecognized compensation cost related to non-vested options and SARs that is expected to be recognized over a weighted average period of 1.31 years.

A summary of the Company’s RSUs and SAs activity follows:

	Number of Shares (in thousands)		Weighted Average Fair Value at Date of Grant		Aggregate     Intrinsic Value     (in thousands)
Units outstanding as of October 2, 2010	385		$	26.90
Granted	155		27.14
Canceled	(18	)	25.92
Vested	(98	)	31.27
Units outstanding as of October 1, 2011	424		$	26.02
Granted	268		36.68
Canceled	(26	)	33.12
Vested	(200	)	25.98
Units outstanding as of September 29, 2012	466		$	31.78
Granted	329		26.16
Canceled	(47	)	31.26
Vested	(94	)	26.59
Units outstanding as of September 28, 2013	654		$	29.73	$	24,140

The Company uses the fair value at the date of grant to value RSUs and SAs. The fair values of RSUs and SAs that vested for fiscal 2013, 2012 and 2011 were $0.5 million, $1.4 million and $0.6 million, respectively. There were 93,831 RSUs and no SAs that vested during the fiscal year ended September 28, 2013. There were 193,684 RSUs and 6,000 SAs that vested during the fiscal year ended September 29, 2012. There were 88,112 RSUs and 10,000 SAs that vested during the fiscal year ended October 1, 2011.

As of September 28, 2013, there was $10.7 million of unrecognized compensation cost related to RSUs that is expected to be recognized over a weighted average period of 1.82 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 these former executives, or their designated beneficiaries upon such executives’ deaths, certain amounts annually for the first 15 years subsequent to their retirements.

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 2013, 2012 and 2011, the Company made contributions to the participants’ SERP accounts in the amount of $0.4 million, $0.4 million and $0.3 million, respectively.

As of September 28, 2013 and September 29, 2012, the SERP assets held in the Trust totaled $9.1 million and $7.7 million, respectively, and the related liability to the participants totaled approximately $5.6 million and $4.8 million as of September 28, 2013 and September 29, 2012, 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.

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Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Allowance For Losses On Accounts Receivable [Member]
Balance at beginning of period	$ 1,011	$ 3,256	$ 1,400
Additions charged to costs and expenses	1,036	259	1,863
Deductions	1,039	2,504	7
Balance at end of period	1,008	1,011	3,256
Valuation Allowance On Deferred Income Tax Assets [Member]
Balance at beginning of period	27,087	5,116	2,548
Additions charged to costs and expenses	6,988	21,971	1,238
Additions charged to other accounts			1,330
Balance at end of period	$ 34,075	$ 27,087	$ 5,116

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Derivatives And Fair Value Measurements

12 Months Ended

Sep. 28, 2013

Derivatives And Fair Value Measurements [Abstract]

Derivatives And Fair Value Measurements

Derivatives and Fair Value Measurements

All derivatives are recognized in the accompanying Consolidated Balance Sheets at their estimated fair values. The Company currently has cash flow hedges related to variable rate debt and forecasted foreign currency payments. The Company also enters into forward currency exchange contracts from time to time to manage foreign currency exchange rate exposures associated with certain foreign currency denominated assets and liabilities. 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. There were no forward currency exchange contracts outstanding related to foreign currency denominated assets and liabilities at September 28, 2013.

The Company enters into forward currency exchange contracts on a rolling basis. These contracts had a total notional value of $71.0 million as of September 28, 2013. These forward currency contracts fix the exchange rates for the settlement of future foreign currency obligations that have yet to be realized. The total fair value of the forward currency exchange contracts was a $1.0 million liability as of September 28, 2013, and a $1.1 million asset as of September 29, 2012.

On June 4, 2013, the Company entered into an interest rate swap contract to replace the three interest rate swap contracts that matured on April 4, 2013, as described below. The new interest rate swap contract is related to the $75.0 million term loan under the Company's Credit Facility. This interest rate swap pays the Company variable interest at the one month LIBOR rate, and the Company pays the counterparty a fixed interest rate. The fixed interest rate for the contract is 0.875%. Based on the terms of the interest rate swap contract and the underlying debt, the interest rate contract was determined to be effective, and thus qualifies as a cash flow hedge. As such, any changes in the fair value of the interest rate swap are recorded in "Accumulated other comprehensive income" on the accompanying Condensed Consolidated Balance Sheets until earnings are affected by the variability of cash flows. The total fair value of the interest rate swap contract was a $0.03 million asset as of September 28, 2013. As of September 28, 2013, the notional amount of the Company's interest rate swap was $75.0 million.

The Company entered into three interest rate swap contracts related to the term loans under its prior credit facility that had an initial total notional value of $150 million and matured on April 4, 2013, which resulted in a $2.0 million discrete tax benefit in fiscal 2013. The fixed interest rates for each of these contracts were 4.415%, 4.490% and 4.435%, respectively. These interest rate swap contracts were originally entered into to convert $150 million of the variable rate term loan under the prior 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 qualified as a cash flow hedge. As such, any changes in the fair value of these interest rate swaps were recorded in “Accumulated other comprehensive income” on the accompanying Condensed Consolidated Balance Sheets until earnings were affected by the variability of cash flows. The total fair value of these interest rate swap contracts was a $1.7 million liability as of September 29, 2012.

The tables below present information regarding the fair values of derivative instruments (as defined in Note 1, "Description of Business and Significant Accounting Policies") and the effects of derivative instruments on the Company’s Consolidated Financial Statements:

Fair Values of Derivative Instruments
In thousands of dollars
	Asset Derivatives			Liability Derivatives
		September 28, 2013	September 29, 2012		September 28, 2013	September 29, 2012
Derivatives designated as hedging instruments	Balance Sheet Location	Fair Value	Fair Value	Balance Sheet Location	Fair Value	Fair Value
Interest rate swaps	Prepaid expenses and other	$34	$—	Current liabilities – Other	$—	$1,715
Forward contracts	Prepaid expenses and other	$—	$1,095	Current liabilities – Other	$999	$—

The Effect of Derivative Instruments on the Statements of Comprehensive Income 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)
	September 28, 2013	September 29, 2012		September 28, 2013	September 29, 2012		September 28, 2013	September 29, 2012
Interest rate swaps	$961	$(40)	Interest income (expense)	$(788)	$(3,564)	Other income (expense)	$—	$—
Forward contracts	$(1,389)	$3,021	Selling and administrative expenses	$709	$(597)	Other income (expense)	$—	$—
Treasury Rate Locks	$—	$—	Interest income (expense)	$321	$320	Other income (expense)	$—	$—
Income Tax (Benefit) Expense	$—	$—	Income Tax (Benefit) Expense	$2,031	$—	Income Tax (Benefit) Expense	$—	$—

The following table lists the fair values of assets/(liabilities) of the Company’s derivatives as of September 28, 2013, by input level as defined in Note 1, "Description of Business and Significant Accounting Policies":

	Fair Value Measurements Using Input Levels Asset/ (Liability) (in thousands):
Fiscal year ended September 28, 2013	Level 1	Level 2	Level 3	Total
Derivatives
Interest rate swaps	$—	$34	$—	$34
Forward currency forward contracts	$—	$(999)	$—	$(999)
Fiscal year ended September 29, 2012
Derivatives
Interest rate swaps	$—	$(1,715)	$—	$(1,715)
Forward currency forward contracts	$—	$1,095	$—	$1,095

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.

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Description Of Business And Significant Accounting Policies

12 Months Ended

Sep. 28, 2013

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Significant Accounting Policies [Text Block]

Description of Business and Significant Accounting Policies

Description of Business:  Plexus Corp. and its subsidiaries (together “Plexus” or the “Company”) participate in the Electronic Manufacturing Services (“EMS”) industry. Plexus delivers 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"), Europe, Middle East, and Africa ("EMEA"), and Asia-Pacific ("APAC") regions. Customer service is provided to over 140 branded product companies in the Networking/Communications, Healthcare/Life Sciences, Industrial/Commercial and Defense/Security/Aerospace market sectors. The Company's 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 the Company's customers’ products require complex configuration management and direct order fulfillment to their customers across the globe. In such cases Plexus provides global logistics management and after-market service and repair. The Company's customers’ products may have stringent requirements for quality, reliability and regulatory compliance. Plexus offers its 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. The accounting years for fiscal 2013, 2012 and 2011 each included 364 days.

The Company’s reportable segments consist of the AMER, APAC and EMEA segments. Refer to Note 12, "Reportable Segments, Geographic Information and Major Customers," for further details on reportable segments.

Cash and Cash Equivalents:  Cash equivalents are highly liquid investments purchased with an original maturity of less than three months and are classified as Level 1 in the fair level hierarchy described below. As of September 28, 2013 and September 29, 2012, cash and cash equivalents were the following (in thousands):

	2013		2012
Cash	$	157,988	$	124,648
Money market funds and other	183,877		172,971
	$	341,865	$	297,619

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:

Buildings and improvements	15-50 years
Machinery and equipment	3-10 years
Computer hardware and software	3-10 years

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 4, "Property, Plant and Equipment") 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. This includes costs of both the software and the 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.

Expenditures for maintenance and repairs are expensed as incurred.

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 and intangible assets with finite lives 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 for each of fiscal 2013, 2012 and 2011.

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 7, "Income Taxes"). Realization of deferred income tax assets in each of the Company's tax jurisdictions is dependent on the Company’s ability to generate future taxable income in these jurisdictions. 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:  The Company translates 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. The Company translates 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 Consolidated Statements of Comprehensive Income as a component of miscellaneous income (expense). Exchange (losses) gains on foreign currency transactions were $(1.2) million, $0.2 million, and $1.0 million for fiscal 2013, 2012 and 2011, respectively.

Derivatives:  All derivatives are recognized on the balance sheet at their fair market value. The Company periodically enters into forward currency exchange contracts and interest rate swaps. 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. The Company's interest rate swaps and certain forward currency exchange contracts are treated as cash flow hedges and, therefore, $(2.7) million, $6.8 million and $(0.4) million were recorded in “Accumulated other comprehensive income” for fiscal 2013, 2012 and 2011, respectively.

Grants from Government Authorities: Grants from governments are recognized at their fair value where there is reasonable assurance that the grant funds will be received and the Company will comply with all attached conditions to the grant.

Government grants relating to property, plant and equipment are recorded as an offset to the carrying value of the related assets at the time of capitalization. Government grants relating to other costs incurred are recognized as an offset to those related costs, for which the grants are intended to compensate for, at the time they are recognized.

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 Comprehensive Income 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 September 28, 2013 and September 29, 2012 (in thousands):

	2013		2012
Foreign currency translation adjustments	$	19,448	$	12,694
Cumulative change in fair market value of derivative instruments, net of tax	789		3,490
Accumulated other comprehensive income	$	20,237	$	16,184

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 6, "Derivatives and Fair Value Measurements."

Conditional Asset Retirement Obligations:  The Company recognizes 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 ("GAAP") 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 $12.2 million and $13.7 million as of September 28, 2013 and September 29, 2012, respectively. The fair value of the Company’s long-term debt was $246.8 million and $256.8 million as of September 28, 2013 and September 29, 2012, respectively. The Company uses quoted market prices when available or discounted cash flows to calculate fair value. If measured at fair value in the financial statements, long-term debt and capital lease obligations (including the current portion) would be classified as Level 2 in the fair value hierarchy described below. The fair values of the Company’s derivatives are disclosed in Note 6, "Derivatives and Fair Value Measurements."

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 12, "Reportable Segments, Geographic Information and Major Customers." The Company, at times, requires advanced cash deposits for services performed. The Company also closely monitors extensions of credit.

New Accounting Pronouncements:  In July 2013, the Financial Accounting Standards Board (“FASB”) issued new guidance for unrecognized tax benefits that exist along with a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. The guidance requires an entity to present an unrecognized tax benefit as a reduction of a deferred tax asset for an net operating loss ("NOL") carryforward, or similar tax loss or tax credit carryforward, rather than as a liability when (1) the uncertain tax position would reduce the NOL or other carryforward under the tax law of the applicable jurisdiction and (2) the entity intends to use the deferred tax asset for that purpose. This guidance is effective prospectively for fiscal years, and interim periods within those years, beginning after December 15, 2013. Early adoption and retrospective application are permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

In July 2013, the FASB issued amended guidance that permits the Fed Funds Effective Swap Rate ("OIS") to be used as a U.S. benchmark interest rate for hedge accounting purposes, in addition to Treasury obligations of the U.S. government ("UST") and the London Interbank Offered Rate ("LIBOR"). The amendments also remove the restriction on using different benchmark rates for similar hedges. This update is effective prospectively for qualifying new or redesignated hedging relationships entered into on or after July 17, 2013. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements or results of operations.

In March 2013, the FASB issued amended guidance for cumulative translation adjustments upon derecognition of certain subsidiaries or groups of assets within a foreign entity or of an investment in a foreign entity. These amendments provide guidance on releasing cumulative translation adjustments when a reporting entity ceases to have a controlling financial interest in a subsidiary or group of assets that is a nonprofit activity or a business within a foreign entity.  In addition, these amendments provide guidance on the release of cumulative translation adjustment in partial sales of equity method investments and in step acquisitions.  The amendments are effective on a prospective basis for fiscal years and interim reporting periods within those years, beginning after December 15, 2013. Early adoption is permitted. The adoption of this guidance is not expected to have a material impact on the Company's consolidated financial statements.

In February 2013, the FASB issued guidance that requires entities to present the changes in the components of accumulated other comprehensive income. Entities are required to present separately the amount of the change that is due to reclassifications, and the amount that is due to current period other comprehensive income. These changes may be shown before or net of tax, and displayed either on the face of the financial statements or in the footnotes. Public entities are required to comply with the standard for annual and interim periods starting with the first interim period in the fiscal period beginning after December 15, 2012. The Company adopted this guidance as of the second fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.

In January 2013, the FASB issued a clarification of its previous amendment to disclosures about offsetting assets and liabilities. The clarification stated which instruments and transactions are subject to the original amendment requiring an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effects of those arrangements on its financial position. Public entities are required to apply the amendment for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. An entity should provide the disclosures required by those amendments retrospectively for all comparative periods presented. This guidance will be effective for the Company's 2014 fiscal year and is not expected to have an impact on the Company's consolidated financial position, results of operations or cash flows, as the guidance only relates to the presentation of the Company's financial statement disclosures.

In June 2011, the FASB issued an amendment to comprehensive income guidance, which eliminates the option to present other comprehensive income 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. This guidance is effective for financial statements issued for fiscal years, and interim periods within those years, beginning after December 15, 2011. The Company adopted this guidance as of the first fiscal quarter of 2013 with no impact to the Company's consolidated financial position, results of operations or cash flows, as the guidance only related to the presentation of the Company's financial statement disclosures.

Reclassifications: Long-term deferred income tax liabilities in fiscal 2012, in the amount of $3.3 million, were reclassified from short-term deferred income tax assets to conform to current year presentation on the Consolidated Balance Sheets.

Description Of Business And Significant Accounting Policies

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. The accounting years for fiscal 2013, 2012 and 2011 each included 364 days.

The Company’s reportable segments consist of the AMER, APAC and EMEA segments. Refer to Note 12, "Reportable Segments, Geographic Information and Major Customers," for further details on reportable segments.

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Derivatives And Fair Value Measurements (Schedule Of Fair Value Measurements Using Input Levels) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012
Interest Rate Swaps [Member]
Interest Rate Cash Flow Hedge Liability at Fair Value		$ (1,715)
Interest Rate Swaps [Member] | Fair Value, Inputs, Level 2 [Member]
Interest Rate Cash Flow Hedge Liability at Fair Value		(1,715)
Interest Rate Cash Flow Hedge Asset at Fair Value	34
Foreign Currency Forward Contracts [Member]
Foreign Currency Contracts, Liability, Fair Value Disclosure	(999)
Foreign Currency Forward Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Foreign Currency Contracts, Liability, Fair Value Disclosure	(999)
Foreign Currency Contract, Asset, Fair Value Disclosure		$ 1,095

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Debt, Capital Lease Obligations And Other Financing (Schedule Of Aggregate Scheduled Maturities Of Debt Obligations) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2013
Debt and Capital Lease Obligations [Abstract]
2015	$ 0
2016	0
2017	75,000
2018	175,000
Total	$ 250,000

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Reportable Segments, Geographic Information And Major Customers (Tables)

12 Months Ended

Sep. 28, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

Information about the Company’s three reportable segments for fiscal 2013, 2012 and 2011 were as follows (in thousands):

	2013			2012			2011
Net sales:
AMER	$	1,062,758		$	1,255,851		$	1,304,885
APAC	1,146,299			1,110,365			1,063,079
EMEA	122,566			95,360			92,269
Elimination of inter-segment sales	(103,592		)	(154,844		)	(229,001		)
	$	2,228,031		$	2,306,732		$	2,231,232
Depreciation:
AMER	$	13,474		$	14,486		$	15,045
APAC	23,560			23,428			20,723
EMEA	4,644			3,438			2,947
Corporate	5,732			6,566			7,919
	$	47,410		$	47,918		$	46,634
Operating income (loss):
AMER	$	70,863		$	91,087		$	68,725
APAC	116,350			101,903			118,063
EMEA	(3,096		)	(2,325		)	(2,955		)
Corporate and other costs	(87,494		)	(86,506		)	(82,654		)
	$	96,623		$	104,159		$	101,179
Capital expenditures:
AMER	$	60,507		$	11,532		$	12,578
APAC	12,345			39,321			44,890
EMEA	30,836			9,863			10,233
Corporate	4,434			2,981			3,118
	$	108,122		$	63,697		$	70,819
	September 28, 2013			September 29, 2012
Total assets:
AMER	$	423,048		$	403,911
APAC	828,672			771,781
EMEA	111,977			88,420
Corporate	83,987			147,355
	$	1,447,684		$	1,411,467

Net Sales To Unaffiliated Customers And Long-Lived Assets

Net sales to unaffiliated customers were based on the Company’s location providing product or services (in thousands):

	2013			2012			2011
Net sales:
United States	$	1,004,153		$	1,156,347		$	1,192,389
Malaysia	877,748			872,733			836,808
China	268,551			237,632			226,271
United Kingdom	81,657			60,313			75,771
Mexico	58,605			99,504			112,496
Romania	38,117			33,835			16,498
Germany	2,792			1,212			—
Elimination of inter-segment sales	(103,592		)	(154,844		)	(229,001		)
	$	2,228,031		$	2,306,732		$	2,231,232
	September 28, 2013			September 29, 2012
Long-lived assets:
United States	$	110,548		$	61,269
Malaysia	83,732			95,907
China	35,230			36,737
United Kingdom	14,645			9,256
Mexico	5,610			7,368
Romania	37,188			13,586
Germany	616			623
Other Foreign	5,463			5,540
Corporate	32,029			34,905
	$	325,061		$	265,191

Concentration Of Risk

The percentages of net sales to customers representing 10 percent or more of total net sales for fiscal 2013, 2012 and 2011 were as follows:

	2013	2012	2011
Juniper Networks, Inc. (“Juniper”)	13%	16%	17%

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Benefit Plans (Schedule Of Restricted Stock Unit And Stock Awards Activity) (Details) (USD $)	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011	Oct. 02, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 19,763,000
Restricted Stock Units (RSUs) [Member]
Vested, Number of Shares	93,831	193,684	88,112
Stock Appreciation Rights (SARs) [Member]
Vested, Number of Shares		6,000	10,000
Employee Stock Option and Stock Appreciation Rights [Member]
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price	$ 22.00	$ 22.36	$ 20.78
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	3,065,000	3,071,000	3,219,000	3,189,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 29.27	$ 28.86	$ 27.69	$ 26.18
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value	25,547,000
Granted, Number of Options/SARs	515,000	518,000	641,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	$ 27.66	$ 30.24	$ 31.01
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	3,300,000	4,300,000	3,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(141,000)	(105,000)	(110,000)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price	$ 25.48	$ 34.44	$ 34.87
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	(380,000)	(561,000)	(501,000)
RSUs And SAs [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	500,000	1,400,000	600,000
Restricted Stock Units (RSUs) And Unrestricted Stock Awards (SAs) [Member]
Beginning balance, Number of Shares	466,000	424,000	385,000
Beginning balance, Weighted Average Fair Value at Date of Grant	$ 31.78	$ 26.02	$ 26.90
Granted, Number of Shares	329,000	268,000	155,000
Granted, Weighted Average Fair Value at Date of Grant	$ 26.16	$ 36.68	$ 27.14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	(47,000)	(26,000)	(18,000)
Cancelled, Weighted Average Fair Value at Date of Grant	$ 31.26	$ 33.12	$ 25.92
Vested, Number of Shares	(94,000)	(200,000)	(98,000)
Vested, Weighted Average Fair Value at Date of Grant	$ 26.59	$ 25.98	$ 31.27
Ending balance, Number of Shares	654,000	466,000	424,000
Ending balance, Weighted Average Fair Value at Date of Grant	$ 29.73	$ 31.78	$ 26.02
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 24,140,000

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Income Taxes (Schedule Of Major Tax Jurisdictions) (Details)	12 Months Ended
	Sep. 28, 2013
China [Member] | Maximum [Member]
Tax years	2013
China [Member] | Minimum [Member]
Tax years	2008
Germany [Member] | Maximum [Member]
Tax years	2013
Germany [Member] | Minimum [Member]
Tax years	2009
MEXICO | Maximum [Member]
Tax years	2013
MEXICO | Minimum [Member]
Tax years	2006
Romania [Member] | Maximum [Member]
Tax years	2013
Romania [Member] | Minimum [Member]
Tax years	2009
United Kingdom [Member] | Maximum [Member]
Tax years	2013
United Kingdom [Member] | Minimum [Member]
Tax years	2007
United States Federal [Member] | Maximum [Member]
Tax years	2013
United States Federal [Member] | Minimum [Member]
Tax years	2007
United States State [Member] | Maximum [Member]
Tax years	2013
United States State [Member] | Minimum [Member]
Tax years	2001

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Guarantees

12 Months Ended

Sep. 28, 2013

Guarantees [Abstract]

Guarantees

Guarantees

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 the Company's accompanying 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 2013 and 2012 (in thousands):

Limited warranty liability, as of October 1, 2011	$	5,453
Accruals for warranties issued during the period	649
Settlements (in cash or in kind) during the period	(957		)
Limited warranty liability, as of September 29, 2012	5,145
Accruals for warranties issued during the period	1,168
Settlements (in cash or in kind) during the period	(371		)
Limited warranty liability, as of September 28, 2013	$	5,942

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Operating Lease Commitments

12 Months Ended

Sep. 28, 2013

Operating Lease Commitments

Operating Lease Commitments

Operating Lease Commitments

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 2013, 2012 and 2011 was approximately $15.7 million, $14.2 million and $12.8 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):

2014	$	12,689
2015	8,554
2016	6,017
2017	3,663
2018	2,942
Thereafter	12,107
	$	45,972

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Reportable Segments, Geographic Information And Major Customers (Net Sales To Unaffiliated Customers And Long-Lived Assets) (Details) (USD $)	3 Months Ended								12 Months Ended
	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Segment Reporting, Additional Information about Entity's Reportable Segments									108122	63697	70819
Revenue, Net	$ 567,730,000	$ 571,945,000	$ 557,824,000	$ 530,532,000	$ 594,789,000	$ 608,819,000	$ 573,470,000	$ 529,654,000	$ 2,228,031,000	$ 2,306,732,000	$ 2,231,232,000
Elimination of inter-segment sales									(103,592,000)	(154,844,000)	(229,001,000)
Property, Plant and Equipment, Net	325,061,000				265,191,000				325,061,000	265,191,000
Long-lived assets exclusion	43,600,000				46,500,000				43,600,000	46,500,000
United States [Member]
Revenue, Net									1,004,153,000	1,156,347,000	1,192,389,000
Property, Plant and Equipment, Net	110,548,000				61,269,000				110,548,000	61,269,000
Malaysia [Member]
Revenue, Net									877,748,000	872,733,000	836,808,000
Property, Plant and Equipment, Net	83,732,000				95,907,000				83,732,000	95,907,000
China [Member]
Revenue, Net									268,551,000	237,632,000	226,271,000
Property, Plant and Equipment, Net	35,230,000				36,737,000				35,230,000	36,737,000
United Kingdom [Member]
Revenue, Net									81,657,000	60,313,000	75,771,000
Property, Plant and Equipment, Net	14,645,000				9,256,000				14,645,000	9,256,000
MEXICO
Revenue, Net									58,605,000	99,504,000	112,496,000
Property, Plant and Equipment, Net	5,610,000				7,368,000				5,610,000	7,368,000
Romania [Member]
Revenue, Net									38,117,000	33,835,000	16,498,000
Property, Plant and Equipment, Net	37,188,000				13,586,000				37,188,000	13,586,000
Other Foreign Entities [Member]
Property, Plant and Equipment, Net	5,463,000				5,540,000				5,463,000	5,540,000
Corporate [Member]
Segment Reporting, Additional Information about Entity's Reportable Segments									4434	2981	3118
Property, Plant and Equipment, Net	32,029,000				34,905,000				32,029,000	34,905,000
Germany Member
Revenue, Net									2,792,000	1,212,000	0
Property, Plant and Equipment, Net	$ 616,000				$ 623,000				$ 616,000	$ 623,000

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Valuation And Qualifying Accounts

12 Months Ended

Sep. 28, 2013

Valuation and Qualifying Accounts [Abstract]

Valuation And Qualifying Accounts

Schedule II – Valuation and Qualifying Accounts

For the fiscal years ended September 28, 2013, September 29, 2012 and October 1, 2011 (in thousands):

Descriptions	Balance at beginning of period		Additions charged to costs and expenses		Additions charged to other accounts		Deductions			Balance at end of period
Fiscal Year 2013:
Allowance for losses on accounts receivable (deducted from the asset to which it relates)	$	1,011	$	1,036	$	—	$	1,039	*	$	1,008
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)	$	27,087	$	6,988	$	—	$	—		$	34,075
Fiscal Year 2012:
Allowance for losses on accounts receivable (deducted from the asset to which it relates)	$	3,256	$	259	$	—	$	2,504	*	$	1,011
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)	$	5,116	$	21,971	$	—	$	—		$	27,087
Fiscal Year 2011:
Allowance for losses on accounts receivable (deducted from the asset to which it relates)	$	1,400	$	1,863	$	—	$	7		$	3,256
Valuation allowance on deferred income tax assets (deducted from the asset to which it relates)	$	2,548	$	1,238	$	1,330	$	—		$	5,116
* Amount represents favorable resolution of amounts previously reserved for at the end of the prior year and amounts written off.

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Shareholders' Equity

12 Months Ended

Sep. 28, 2013

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders' Equity

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 for approximately $200.0 million, at an average price of $31.69 per share. These shares were recorded as treasury stock.

On October 23, 2012, the Board of Directors approved a stock repurchase program under which the Company was authorized to repurchase up to $50 million of its common stock. This program was completed in the fourth quarter of fiscal 2013. During fiscal 2013, the Company repurchased 1,821,698 shares under this program for approximately $49.9 million, at an average price of $27.37 per share. These shares were recorded as treasury stock.

On August 19, 2013, the Board of Directors approved a stock repurchase program under which the Company is authorized to repurchase up to $30 million of its common stock in fiscal 2014. Accordingly, no shares were purchased under this authorization in fiscal 2013.

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.

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Document And Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Nov. 18, 2013	Mar. 30, 2013
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 28, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Entity Registrant Name	PLEXUS CORP
Entity Central Index Key	0000785786
Current Fiscal Year End Date	--09-28
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		33,796,557
Entity Current Reporting Status	Yes
Entity Public Float			$ 825.2
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No

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Quarterly Financial Data

12 Months Ended

Sep. 28, 2013

Quarterly Financial Data [Abstract]

Quarterly Financial Data

Quarterly Financial Data (Unaudited)

Summarized quarterly financial data for fiscal 2013 and 2012 consisted of (in thousands, except per share amounts):

2013	First Quarter		Second Quarter		Third Quarter		Fourth Quarter			Total
Net sales	$	530,532	$	557,824	$	571,945	$	567,730		$	2,228,031
Gross profit	51,162		52,021		55,473		54,529			213,185
Net income	16,616		17,975		23,204		24,464			82,259
Earnings per share (1):
Basic	$	0.48	$	0.52	$	0.69	$	0.73		$	2.40
Diluted	$	0.47	$	0.52	$	0.68	$	0.71	(2)	$	2.36
2012	First Quarter		Second Quarter		Third Quarter		Fourth Quarter			Total
Net sales	$	529,654	$	573,470	$	608,819	$	594,789		$	2,306,732
Gross profit	51,652		54,624		57,393		56,244			219,913
Net income	17,870		19,958		23,533		728		*	62,089
Earnings per share (1):
Basic	$	0.52	$	0.57	$	0.67	$	0.02		$	1.78
Diluted	$	0.51	$	0.56	$	0.66	$	0.02		$	1.75

(1) 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.

(2) Adjusting for fourth quarter discrete tax items, as discussed in Note 7, "Income Taxes," diluted earnings per share for the fourth quarter of 2013 was $0.67.

*See Note 7 in Notes to Consolidated Financial Statements for discussion regarding the fiscal 2012 valuation allowance recorded for deferred tax assets.

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Operating Lease Commitments (Schedule Of Future Minimum Annual Payments On Operating Leases) (Details) (USD $)	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Operating Lease Commitments
Lease expiration date	Dec. 31, 2021
Rent expenses under operating leases	$ 15,700,000	$ 14,200,000	$ 12,800,000
2014	12,689,000
2015	8,554,000
2016	6,017,000
2017	3,663,000
2018	2,942,000
Thereafter	12,107,000
Future minimum annual payments on operating leases	$ 45,972,000

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Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Earnings Per Share [Abstract]
Stock Repurchased During Period, Shares									1,821,698		6,300,000
Net income	$ 24,464	$ 23,204	$ 17,975	$ 16,616	$ 728	$ 23,533	$ 19,958	$ 17,870	$ 82,259	$ 62,089	$ 89,256
Basic weighted average common shares outstanding									34,330,000	34,874,000	38,063,000
Dilutive effect of stock options									562,000	655,000	737,000
Diluted weighted average shares outstanding									34,892,000	35,529,000	38,800,000
Basic	$ 0.73	$ 0.69	$ 0.52	$ 0.48	$ 0.02	$ 0.67	$ 0.57	$ 0.52	$ 2.40	$ 1.78	$ 2.34
Earnings Per Share, Diluted	$ 0.71	$ 0.68	$ 0.52	$ 0.47	$ 0.02	$ 0.66	$ 0.56	$ 0.51	$ 2.36	$ 1.75	$ 2.30
Antidilutive securities excluded from computation of diluted earnings per share									1,900,000	1,400,000	1,300,000