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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 10-Q

QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2012

Commission file number:  1-3285

3M COMPANY

(Exact name of registrant as specified in its charter)

(651) 733-1110

(Registrant’s telephone number, including area code)

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 x  No o

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 x  No o

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 o  No x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.

This document (excluding exhibits) contains 77 pages.

The table of contents is set forth on page 2.

The exhibit index begins on page 74.

Table of Contents

3M COMPANY

Form 10-Q for the Quarterly Period Ended September 30, 2012

TABLE OF CONTENTS

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3M COMPANY

FORM 10-Q

For the Quarterly Period Ended September 30, 2012

PART I.  Financial Information

Item 1.  Financial Statements.

3M Company and Subsidiaries

Consolidated Statement of Income

(Unaudited)

The accompanying Notes to Consolidated Financial Statements are an integral part of this statement.

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3M Company and Subsidiaries

Consolidated Statement of Comprehensive Income

(Unaudited)

The accompanying Notes to Consolidated Financial Statements are an integral part of this statement.

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3M Company and Subsidiaries

Consolidated Balance Sheet

(Unaudited)

The accompanying Notes to Consolidated Financial Statements are an integral part of this statement.

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3M Company and Subsidiaries

Consolidated Statement of Cash Flows

(Unaudited)

The accompanying Notes to Consolidated Financial Statements are an integral part of this statement.

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3M Company and Subsidiaries

Notes to Consolidated Financial Statements

(Unaudited)

NOTE 1.  Significant Accounting Policies

Basis of Presentation

The interim consolidated financial statements are unaudited but, in the opinion of management, reflect all adjustments necessary for a fair statement of the Company’s consolidated financial position, results of operations and cash flows for the periods presented. These adjustments consist of normal, recurring items. The results of operations for any interim period are not necessarily indicative of results for the full year. The interim consolidated financial statements and notes are presented as permitted by the requirements for Quarterly Reports on Form 10-Q. This Quarterly Report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and notes included in its 2011 Annual Report on Form 10-K.

Earnings Per Share

The difference in the weighted average 3M shares outstanding for calculating basic and diluted earnings per share attributable to 3M common shareholders is a result of the dilution associated with the Company’s stock-based compensation plans. Certain options outstanding under these stock-based compensation plans were not included in the computation of diluted earnings per share attributable to 3M common shareholders because they would not have had a dilutive effect (6.3 million average options for the three months ended September 30, 2012; 15.6 million average options for the nine months ended September 30, 2012; 29.7 million average options for the three months ended September 30, 2011; and 12.3 million average options for the nine months ended September 30, 2011). The computations for basic and diluted earnings per share follow:

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Earnings Per Share Computations

New Accounting Pronouncements

In May 2011, the Financial Accounting Standards Board (FASB) issued Accounting Standards Updated (ASU) No. 2011-04, Fair Value Measurement: Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. This standard clarifies guidance on how to measure fair value and is largely consistent with existing fair value measurement principles. The ASU also expands existing disclosure requirements for fair value measurements and makes other amendments. For 3M, this ASU was effective prospectively beginning January 1, 2012. The adoption of this standard did not have a material impact on 3M’s consolidated results of operations or financial condition.

In September 2011, the FASB issued ASU No. 2011-08, Testing Goodwill for Impairment. Under this standard, entities testing goodwill for impairment now have an option of performing a qualitative assessment before having to calculate the fair value of a reporting unit. If an entity determines, on the basis of qualitative factors, that the fair value of the reporting unit is more-likely-than-not less than the carrying amount, the existing quantitative impairment test is required. Otherwise, no further impairment testing is required. For 3M, this ASU was effective beginning January 1, 2012, with early adoption permitted under certain conditions. The adoption of this standard did not have a material impact on 3M’s consolidated results of operations or financial condition.

In December 2011, the FASB issued ASU No. 2011-11, Disclosures About Offsetting Assets and Liabilities, which creates new disclosure requirements regarding the nature of an entity’s rights of setoff and related arrangements associated with its financial instruments and derivative instruments. Certain disclosures of the amounts of certain instruments subject to enforceable master netting arrangements or similar agreements would be required, irrespective of whether the entity has elected to offset those instruments in the statement of financial position. For 3M, the ASU is effective January 1, 2013 with retrospective application required. Since this standard impacts disclosure requirements only, its adoption will not have a material impact on 3M’s consolidated results of operations or financial condition.

In July 2012, the FASB issued ASU No. 2012-02, Testing Indefinite-Lived Intangible Assets for Impairment. Under this standard, entities testing long-lived intangible assets for impairment now have an option of performing a qualitative assessment to determine whether further impairment testing is necessary. If an entity determines, on the basis of qualitative factors, that the fair value of the indefinite-lived intangible asset is more-likely-than-not less than the carrying amount, the existing quantitative impairment test is required. Otherwise, no further impairment testing is required. For 3M, this ASU is effective beginning January 1, 2013, with early adoption permitted under certain conditions. The adoption of this standard is not expected to have a material impact on 3M’s consolidated results of operations or financial condition.

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NOTE 2.  Acquisitions

3M makes acquisitions of certain businesses from time to time that the Company feels align with its strategic intent with respect to, among other factors, growth markets and adjacent product lines or technologies. Goodwill resulting from business combinations is largely attributable to the existing workforce of the acquired businesses and synergies expected to arise after 3M’s acquisition of these businesses. In addition to business combinations, 3M periodically acquires certain tangible and/or intangible assets and purchases interests in certain enterprises that do not otherwise qualify for accounting as business combinations. These transactions are largely reflected as additional asset purchase and investment activity.

During the nine months ended September 30, 2012, the purchase price paid for business combinations (net of cash acquired) aggregated to $248 million. The allocations of purchase price related to the acquisitions of CodeRyte, Inc. in April 2012 and the business purchased from Federal Signal Corp. in September 2012 are considered preliminary, largely with respect to tax-related items and certain other assets and liabilities. Adjustments in the first nine months of 2012 to the preliminary purchase price allocations of other acquisitions within the allocation period were not material and primarily related to the 2011 acquisitions of Winterthur Technologie AG and the business acquired from GPI Group. Refer to Note 2 in 3M’s 2011 Annual Report on Form 10-K for more information on 3M’s 2011 acquisitions.

In April 2012, 3M (Health Care Business) purchased all of the outstanding shares of CodeRyte, Inc., an industry leader in clinical natural processing technology and computer-assisted coding solutions for healthcare outpatient providers, which is headquartered in Bethesda, Maryland.

In September 2012, 3M (Display and Graphics Business) purchased the net assets of Federal Signal Technologies Group from Federal Signal Corp., for a total purchase price of approximately $104 million. This business focuses on electronic toll collection and parking management hardware and software services, with primary facilities spread throughout the United States and in the U.K.

For acquisitions which closed in the first nine months of 2012, purchased identifiable finite-lived intangible assets totaled $95 million. These assets will be amortized on a straight-line basis over a weighted-average life of 12 years (lives ranging from 2 to 15 years). Acquired in-process research and development and identifiable intangible assets for which significant assumed renewals or extensions of underlying arrangements impacted the determination of their useful lives were not material. Pro forma information related to acquisitions was not included because the impact on the Company’s consolidated results of operations was not considered to be material.

In December 2011, 3M (Consumer and Office Business) entered into a definitive agreement to acquire the Office and Consumer Products business of Avery Dennison Corp. (Avery). 3M and Avery withdrew from the regulatory approval process for this acquisition in September 2012 and subsequently announced that they had terminated this agreement in October 2012.

In October 2012, 3M (Industrial and Transportation Business) announced that it had entered into a definitive agreement to acquire Ceradyne, Inc. (Ceradyne) and commenced its cash tender offer for all outstanding shares of Ceradyne at a price of $35.00 per share. The tender offer is scheduled to expire on November 27, 2012, unless extended. The proposed transaction has an aggregate value of approximately $860 million, or approximately $670 million net of cash, cash equivalents, short-term investments and debt. Ceradyne, headquartered in Costa Mesa, California, is involved in the development and production of advanced technical ceramics for demanding applications in the automotive, oil and gas, solar, industrial, electronics and defense industries. The transaction is expected to be completed in the fourth quarter of 2012, subject to customary closing conditions including any necessary regulatory approvals.

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NOTE 3.  Goodwill and Intangible Assets

Purchased goodwill related to acquisitions that closed during the first nine months of 2012 totaled $127 million, $39 million of which is deductible for tax purposes. The acquisition activity in the following table includes the net impacts of adjustments to the preliminary allocation of purchase price for prior year acquisitions, which increased goodwill by $12 million. The amounts in the “Translation and other” column in the following table primarily relate to changes in foreign currency exchange rates. The goodwill balances by business segment as of December 31, 2011 and September 30, 2012, follow:

Goodwill

Accounting standards require that goodwill be tested for impairment annually and between annual tests in certain circumstances such as a change in reporting units or the testing of recoverability of a significant asset group within a reporting unit. At 3M, reporting units generally correspond to a division.

Effective in the first quarter of 2012, 3M made certain product moves across divisions within its business segments, but none were across business segments. For any product moves that resulted in reporting unit changes, the Company applied the relative fair value method to determine the impact on goodwill of the associated reporting units. In addition, during the first quarter of 2012, the Company completed its assessment of any potential goodwill impairment for reporting units impacted by this new structure and determined that no impairment existed.

Acquired Intangible Assets

For the nine months ended September 30, 2012, gross intangible assets (excluding goodwill) acquired through business combinations increased balances, with this impact largely offset by changes in foreign currency exchange rates. The carrying amount and accumulated amortization of acquired finite-lived intangible assets, in addition to the balance of non-amortizable intangible assets, as of September 30, 2012, and December 31, 2011, follow:

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Amortization expense for acquired intangible assets for the three-month and nine-month periods ended September 30, 2012 and 2011 follows:

The table below shows expected amortization expense for acquired amortizable intangible assets recorded as of September 30, 2012:

The expected amortization expense is an estimate. Actual amounts of amortization expense may differ from estimated amounts due to intangible asset acquisitions, changes in foreign currency exchange rates, impairment of intangible assets, accelerated amortization of intangible assets and other events. 3M expenses the costs incurred to renew or extend the term of intangible assets.

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NOTE 4.  Supplemental Equity and Comprehensive Income Information

Consolidated Statement of Changes in Equity

Three months ended September 30, 2012

Nine months ended September 30, 2012