Silicon Laboratories (SLAB)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

For the quarterly period ended September 29, 2012

or

For the transition period from                  to                 

Commission file number:  000-29823

(Exact name of registrant as specified in its charter)

(512) 416-8500

(Registrant’s telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Sections 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.  x Yes  o 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).  x Yes  o No

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

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

As of October 17, 2012, 41,599,066 shares of common stock of Silicon Laboratories Inc. were outstanding.

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Cautionary Statement

Except for the historical financial information contained herein, the matters discussed in this report on Form 10-Q (as well as documents incorporated herein by reference) may be considered “forward-looking” statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward-looking statements include declarations regarding the intent, belief or current expectations of Silicon Laboratories Inc. and its management and may be signified by the words “believe,” “estimate,” “expect,” “intend,” “anticipate,” “plan,” “project,” “will” or similar language. You are cautioned that any such forward-looking statements are not guarantees of future performance and involve a number of risks and uncertainties. Actual results could differ materially from those indicated by such forward-looking statements. Factors that could cause or contribute to such differences include those discussed under “Risk Factors” and elsewhere in this report. Silicon Laboratories disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

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Part I.  Financial Information

Item 1.  Financial Statements

Silicon Laboratories Inc.

Condensed Consolidated Balance Sheets

(Unaudited)

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Silicon Laboratories Inc.

Condensed Consolidated Statements of Income

(Unaudited)

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Silicon Laboratories Inc.

Condensed Consolidated Statements of Comprehensive Income

(Unaudited)

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Silicon Laboratories Inc.

Condensed Consolidated Statements of Cash Flows

(Unaudited)

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Silicon Laboratories Inc.

Notes to Condensed Consolidated Financial Statements

(Unaudited)

The Condensed Consolidated Financial Statements included herein are unaudited; however, they contain all normal recurring accruals and adjustments which, in the opinion of management, are necessary to present fairly the condensed consolidated financial position of Silicon Laboratories Inc. and its subsidiaries (collectively, the “Company”) at September 29, 2012 and December 31, 2011, the condensed consolidated results of its operations for the three and nine months ended September 29, 2012 and October 1, 2011, the Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended September 29, 2012 and October 1, 2011, and the Condensed Consolidated Statements of Cash Flows for the nine months ended September 29, 2012 and October 1, 2011.  All intercompany balances and transactions have been eliminated in consolidation.  The condensed consolidated results of operations for the three and nine months ended September 29, 2012 are not necessarily indicative of the results to be expected for the full year.

The accompanying unaudited Condensed Consolidated Financial Statements do not include certain footnotes and financial presentations normally required under U.S. generally accepted accounting principles (GAAP). Therefore, these Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and notes thereto for the year ended December 31, 2011, included in the Company’s Form 10-K filed with the Securities and Exchange Commission (SEC) on February 15, 2012.

The Company prepares financial statements on a 52-53 week year that ends on the Saturday closest to December 31.  Fiscal 2012 will have 52 weeks and fiscal 2011 had 52 weeks.  In a 52-week year, each fiscal quarter consists of 13 weeks.

Revenues are generated almost exclusively by sales of the Company’s integrated circuits (ICs). The Company recognizes revenue when all of the following criteria are met: 1) there is persuasive evidence that an arrangement exists, 2) delivery of goods has occurred, 3) the sales price is fixed or determinable, and 4) collectibility is reasonably assured. Generally, revenue from product sales to direct customers and contract manufacturers is recognized upon shipment.

A portion of the Company’s sales are made to distributors under agreements allowing certain rights of return and price protection related to the final selling price to the end customers. Accordingly, the Company defers revenue and cost of revenue on such sales until the distributors sell the product to the end customers. The net balance of deferred revenue less deferred cost of revenue associated with inventory shipped to a distributor but not yet sold to an end customer is recorded in the deferred income on shipments to distributors liability on the Consolidated Balance Sheet. Such net deferred income balance reflects the Company’s estimate of the impact of rights of return and price protection.

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Silicon Laboratories Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

In July 2012, the Financial Accounting Standards Board (FASB) issued FASB Accounting Standards Update (ASU) No. 2012-02, Intangibles—Goodwill and Other (Topic 350) — Testing Indefinite-Lived Intangible Assets for Impairment. ASU 2012-02 permits an entity to first assess qualitative factors to determine whether it is more likely than not that an indefinite-lived intangible asset is impaired as a basis for determining whether it is necessary to perform the quantitative impairment test in accordance with Subtopic 350-30. If an entity concludes that it is not more likely than not that the indefinite-lived intangible asset is impaired, then no further action is required. If an entity concludes otherwise, then it is required to determine the fair value of the indefinite-lived intangible asset and perform the quantitative impairment test. ASU 2012-02 is effective for annual and interim impairment tests performed for fiscal years beginning after September 15, 2012, with early adoption permitted. The adoption of this ASU is not expected to have a material impact on the Company’s financial statements.

In December 2011, the FASB issued FASB ASU No. 2011-11, Balance Sheet (Topic 210) — Disclosures about Offsetting Assets and Liabilities. ASU 2011-11 requires an entity to disclose information about offsetting and related arrangements to enable users of its financial statements to understand the effect of those arrangements on its financial position. Entities are required to disclose both gross and net information about these instruments. ASU 2011-11 is effective for annual reporting periods beginning on or after January 1, 2013, and interim periods within those annual periods. The adoption of this ASU is not expected to have a material impact on the Company’s financial statements.

The following table sets forth the computation of basic and diluted earnings per share (in thousands, except per share data):

For the three months ended September 29, 2012 and October 1, 2011 and the nine months ended September 29, 2012 and October 1, 2011, approximately 0.8 million, 1.4 million, 0.9 million and 0.5 million shares, respectively, were not included in the diluted earnings per share calculation since the shares were anti-dilutive.

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Silicon Laboratories Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

3. Cash, Cash Equivalents and Investments

The Company’s cash equivalents and short-term investments as of September 29, 2012 consisted of corporate bonds, money market funds, municipal bonds, U.S. Treasury bills, variable-rate demand notes, U.S. government bonds, asset-backed securities and international government bonds. The Company’s long-term investments consist of auction-rate securities. Early in fiscal 2008, auctions for many of the Company’s auction-rate securities failed because sell orders exceeded buy orders. As of September 29, 2012, the Company held $12.5 million par value auction-rate securities, all of which have experienced failed auctions. The underlying assets of the securities consisted of student loans and municipal bonds, of which $10.5 million were guaranteed by the U.S. government and the remaining $2.0 million were privately insured. As of September 29, 2012, $4.5 million of the auction-rate securities had credit ratings of AAA, $6.0 million had credit ratings of AA and $2.0 million had a credit rating of A. These securities have contractual maturity dates ranging from 2033 to 2046 and with current yields of 0.3% to 1.7% per year at September 29, 2012. The Company is receiving the underlying cash flows on all of its auction-rate securities. The principal amounts associated with failed auctions are not expected to be accessible until a successful auction occurs, the issuer redeems the securities, a buyer is found outside of the auction process or the underlying securities mature. The Company is unable to predict if these funds will become available before their maturity dates.

The Company does not expect to need access to the capital represented by any of its auction-rate securities prior to their maturities. The Company does not intend to sell, and believes it is not more likely than not that it will be required to sell, its auction-rate securities before their anticipated recovery in market value or final settlement at the underlying par value. The Company believes that the credit ratings and credit support of the security issuers indicate that they have the ability to settle the securities at par value. As such, the Company has determined that no other-than-temporary impairment losses existed as of September 29, 2012.

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Silicon Laboratories Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

The Company’s cash, cash equivalents and investments consist of the following (in thousands):

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Silicon Laboratories Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

The available-for-sale investments that were in a continuous unrealized loss position, aggregated by length of time that individual securities have been in a continuous loss position, were as follows (in thousands):

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Silicon Laboratories Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

The gross unrealized losses as of September 29, 2012 and December 31, 2011 were due primarily to the illiquidity of the Company’s auction-rate securities and, to a lesser extent, to changes in market interest rates.

The following summarizes the contractual underlying maturities of the Company’s available-for-sale investments at September 29, 2012 (in thousands):

The Company is exposed to interest rate fluctuations in the normal course of its business, including through its Credit Facilities. The interest payments on the facility are calculated using a variable-rate of interest. The Company has entered into an interest rate swap agreement with a notional value of $100 million (equal to the full amount borrowed under the Term Loan Facility) and, effectively, converted the LIBOR portion of the variable-rate interest payments to fixed-rate interest payments through July 2017 (the maturity date of the Term Loan Facility). The Company’s objective is to offset increases and decreases in expenses resulting from changes in interest rates with gains and losses on the derivative contract, thereby reducing volatility of earnings. The Company does not use derivative contracts for speculative purposes.

The Company’s previous swap agreement with a notional value of $50.1 million was terminated on September 28, 2012 in connection with the Company’s purchase of its corporate headquarters facilities. See Note 8, Acquisitions, for additional information.

The Company’s interest rate swap agreement is designated and qualifies as a cash flow hedge. The effective portion of the gain or loss on the interest rate swap is recorded in accumulated other comprehensive loss as a separate component of stockholders’ equity and is subsequently recognized in earnings when the hedged exposure affects earnings. Cash flows from derivatives are classified according to the nature of the cash receipt or payment in the Consolidated Statement of Cash Flows.

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Silicon Laboratories Inc.

Notes to Condensed Consolidated Financial Statements (Continued)

(Unaudited)

The Company estimates the fair values of derivatives based on quoted prices and market observable data of similar instruments. If the Term Loan Facility or the interest rate swap agreements is terminated prior to maturity, the fair value of the interest rate swap recorded in accumulated other comprehensive loss may be recognized in the Consolidated Statement of Income based on an assessment of the agreements at the time of termination. The termination of the Company’s swap agreement with a notional value of $50.1 million resulted in its remaining fair value of $0.9 million that was previously recorded in accumulated other comprehensive loss to be reclassified into earnings during the three months ended September 29, 2012.

The Company measures the effectiveness of its cash flow hedge by comparing the change in fair value of the hedged item with the change in fair value of the interest rate swap. The Company recognizes ineffective portions of the hedge, as well as amounts not included in the assessment of effectiveness, in the Consolidated Statement of Income. As of September 29, 2012, no portion of the gains or losses from the Company’s hedging instrument was excluded from the assessment of effectiveness. There was no hedge ineffectiveness for any of the periods presented.

The Company’s derivative financial instruments consisted of the following (in thousands):

The before-tax effect of derivative instruments in cash flow hedging relationships was as follows (in thousands):