Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

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

For the fiscal year ended December 31, 2013

Commission file number 1-3285

3M COMPANY

Principal executive offices: 3M Center, St. Paul, Minnesota 55144

Telephone number: (651) 733-1110

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

Note: The common stock of the Registrant is also traded on the SWX Swiss Exchange.

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  x    No  o

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

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 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 if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of 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.  x

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

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

The aggregate market value of voting stock held by nonaffiliates of the Registrant, computed by reference to the closing price and shares outstanding, was approximately $85.0 billion as of January 31, 2014 (approximately $74.7 billion as of June 28, 2013, the last business day of the Registrant’s most recently completed second quarter).

Shares of common stock outstanding at January 31, 2014: 662,692.234.

DOCUMENTS INCORPORATED BY REFERENCE

Parts of the Company’s definitive proxy statement (to be filed pursuant to Regulation 14A within 120 days after Registrant’s fiscal year-end of December 31, 2013) for its annual meeting to be held on May 13, 2014, are incorporated by reference in this Form 10-K in response to Part III, Items 10, 11, 12, 13 and 14.

Table of Contents

3M COMPANY

FORM 10-K

For the Year Ended December 31, 2013

TABLE OF CONTENTS

2

Table of Contents

3M COMPANY

ANNUAL REPORT ON FORM 10-K

For the Year Ended December 31, 2013

PART I

Item 1. Business.

3M Company was incorporated in 1929 under the laws of the State of Delaware to continue operations begun in 1902. The Company’s ticker symbol is MMM. As used herein, the term “3M” or “Company” includes 3M Company and its subsidiaries unless the context indicates otherwise. In this document, for any references to Note 1 through Note 17, refer to the Notes to Consolidated Financial Statements in Item 8.

Available Information

The SEC maintains a website that contains reports, proxy and information statements, and other information regarding issuers, including the Company, that file electronically with the SEC. The public can obtain any documents that the Company files with the SEC at http://www.sec.gov. The Company files annual reports, quarterly reports, proxy statements and other documents with the Securities and Exchange Commission (SEC) under the Securities Exchange Act of 1934 (Exchange Act). The public may read and copy any materials that the Company files with the SEC at the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. The public may obtain information on the operation of the Public Reference Room by calling the SEC at 1-800-SEC-0330.

3M also makes available free of charge through its website (http://investor.3M.com) the Company’s Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and, if applicable, amendments to those reports filed or furnished pursuant to the Exchange Act as soon as reasonably practicable after the Company electronically files such material with, or furnishes it to, the SEC.

General

3M is a diversified technology company with a global presence in the following businesses: Industrial; Safety and Graphics; Electronics and Energy; Health Care; and Consumer. 3M is among the leading manufacturers of products for many of the markets it serves. Most 3M products involve expertise in product development, manufacturing and marketing, and are subject to competition from products manufactured and sold by other technologically oriented companies.

At December 31, 2013, the Company employed 88,667 people (full-time equivalents), with 34,719 employed in the United States and 53,948 employed internationally.

Business Segments

As described in Note 15 to the Consolidated Financial Statements, effective in the first quarter of 2013, the Company completed a realignment of its business segments to better serve global markets and customers. In addition, as described in Note 16, during the first quarter of 2013, 3M realigned its geographic area structure to include Puerto Rico in the United States rather than in the Latin America/Canada region. Segment and geographic area information presented herein reflects the impact of these changes for all periods presented.

3M manages its operations in five operating business segments: Industrial; Safety and Graphics; Electronics and Energy; Health Care; and Consumer. 3M’s five business segments bring together common or related 3M technologies, enhancing the development of innovative products and services and providing for efficient sharing of business resources. These segments have worldwide responsibility for virtually all 3M product lines. Certain small businesses and lab-sponsored products, as well as various corporate assets and expenses, are not attributed to the business segments. Financial information and other disclosures relating to 3M’s business segments and operations in major geographic areas are provided in the Notes to Consolidated Financial Statements.

Industrial Business: The Industrial segment serves a broad range of markets, such as automotive original equipment manufacturer (OEM) and automotive aftermarket (auto body shops and retail), electronics, appliance, paper and printing, packaging, food and beverage, and construction. Industrial products include tapes, a wide variety of coated, non-woven and bonded abrasives, adhesives, advanced ceramics, sealants, specialty materials, 3M Purification Inc. (filtration products), closure systems for personal hygiene products, acoustic systems products, and components and products that

3

Table of Contents

are used in the manufacture, repair and maintenance of automotive, marine, aircraft and specialty vehicles. In the fourth quarter of 2012, 3M acquired Ceradyne, Inc., which develops and produces advanced technical ceramics for demanding applications in the automotive, oil and gas, solar, industrial, electronics and defense industries. In 2011, 3M acquired Winterthur Technologie AG, a leading global supplier of precision grinding technology serving customers in the area of hard-to-grind precision applications in industrial, automotive, aircraft and cutting tools.

Major industrial products include vinyl, polyester, foil and specialty industrial tapes and adhesives; Scotch® Masking Tape, Scotch® Filament Tape and Scotch® Packaging Tape; packaging equipment; 3M™ VHB™ Bonding Tapes; conductive, low surface energy, sealants, hot melt, spray and structural adhesives; reclosable fasteners; label materials for durable goods; and coated, nonwoven and microstructured surface finishing and grinding abrasives for the industrial market. 3M Purification Inc. provides a comprehensive line of filtration products for the separation, clarification and purification of fluids and gases. Other industrial products include fluoroelastomers for seals, tubes and gaskets in engines.

Major transportation products include insulation components, including Thinsulate™ Acoustic Insulation and components for catalytic converters; functional and decorative graphics; abrasion-resistant films; adhesives; sealants; masking tapes; fasteners and tapes for attaching nameplates, trim, moldings, interior panels and carpeting; coated, nonwoven and microstructured finishing and grinding abrasives; structural adhesives; and other specialty materials. In addition, 3M provides paint finishing and detailing products, including a complete system of cleaners, dressings, polishes, waxes and other products.

Safety and Graphics Business: The Safety and Graphics segment serves a broad range of markets that increase the safety, security and productivity of people, facilities and systems. Major product offerings include personal protection products; traffic safety and security products, including border and civil security solutions; commercial graphics sheeting and systems; architectural surface and lighting solutions; cleaning and protection products for commercial establishments; and roofing granules for asphalt shingles.

This segment’s products include personal protection products, such as certain maintenance-free and reusable respirators, personal protective equipment, head and face protection, body protection, hearing protection and protective eyewear. In traffic safety and security, 3M provides reflective sheeting used on highway signs, vehicle license plates, construction work-zone devices, trucks and other vehicles, and also provides pavement marking systems, in addition to electronic surveillance products, films that protect against counterfeiting, and reflective materials that are widely used on apparel, footwear and accessories, enhancing visibility in low-light situations. Traffic safety and security also provides finger, palm, face and iris biometric systems for governments, law enforcement agencies, and commercial enterprises, in addition to remote people-monitoring technologies used for offender-monitoring applications. Major commercial graphics products include films, inks, digital signage systems and related products used to produce graphics for vehicles, signs and interior surfaces. Other products include spill-control sorbents; nonwoven abrasive materials for floor maintenance and commercial cleaning; floor matting; and natural and color-coated mineral granules for asphalt shingles.

Electronics and Energy Business: The Electronics and Energy segment serves customers in electronics and energy markets, including solutions for dependable, cost-effective, high-performance electronic devices, telecommunications networks, electrical products, power generation and distribution, and infrastructure protection.

This segment’s electronics solutions include optical film solutions for the electronic display industry. 3M provides distinct products for five market segments, including products for: 1) LCD computer monitors, 2) LCD televisions, 3) hand-held devices such as cellular phones and tablets, 4) notebook PCs and 5) automotive displays. This segment also provides desktop and notebook computer screen filters that address display light control, privacy, and glare reduction needs. Major electronics products also include packaging and interconnection devices; high performance fluids and abrasives used in the manufacture of computer chips, and for cooling electronics and lubricating computer hard disk drives; and high-temperature and display tapes. 3M™ Flexible Circuits use electronic packaging and interconnection technology, providing more connections in less space, and are used in ink-jet printer cartridges, cell phones and electronic devices. This segment also includes the touch systems business, including touch screens, touch monitors, and touch sensor components.

This segment’s energy solutions include electrical, telecommunications, renewable energy, and infrastructure protection products. This segment serves the worlds electrical and telecommunications markets, including electrical utilities, electrical construction, maintenance and repair, original equipment manufacturers (OEM), telecommunications central office, outside plant and enterprise, as well as aerospace, military, automotive and medical markets, with products that enable the efficient transmission of electrical power and speed the delivery of information. Products in this segment include pressure sensitive tapes and resins, electrical insulation, a wide array of fiber-optic and copper-based telecommunications systems for rapid deployment of fixed and wireless networks, as well as the 3M™ Aluminum

4

Table of Contents

Conductor Composite Reinforced (ACCR) electrical power cable that increases transmission capacity for existing power lines. This segment also includes renewable energy component solutions for the solar and wind power industries, as well as infrastructure products solutions that provide municipalities both protection and detection solutions for electrical, oil, natural gas, water, rebar and other infrastructure assets.

Health Care Business: The Health Care segment serves markets that include medical clinics and hospitals, pharmaceuticals, dental and orthodontic practitioners, health information systems, and food manufacturing and testing. Products and services provided to these and other markets include medical and surgical supplies, skin health and infection prevention products, inhalation and transdermal drug delivery systems, dental and orthodontic products (oral care), health information systems, and food safety products.

In the medical and surgical areas, 3M is a supplier of medical tapes, dressings, wound closure products, orthopedic casting materials, electrodes and stethoscopes. In infection prevention, 3M markets a variety of surgical drapes, masks and preps, as well as sterilization assurance equipment and patient warming solutions designed to prevent hypothermia in surgical settings. Other products include drug delivery systems, such as metered-dose inhalers, transdermal skin patches and related components. Dental and orthodontic products include restoratives, adhesives, finishing and polishing products, crowns, impression materials, preventive sealants, professional tooth whiteners, prophylaxis and orthodontic appliances, as well as digital workflow solutions to transform traditional impression and analog processes. In health information systems, 3M develops and markets computer software for hospital coding and data classification, and provides related consulting services. 3M provides food safety products that make it faster and easier for food processors to test the microbiological quality of food.

Consumer Business: The Consumer segment serves markets that include consumer retail, office retail, home improvement, building maintenance and other markets. Products in this segment include office supply products, stationery products, construction and home improvement products (do-it-yourself), home care products, protective material products, certain consumer retail personal safety products, and consumer health care products.

Major consumer products include Scotch® brand products, such as Scotch® Magic™ Tape, Scotch® Glue Stick and Scotch® Cushioned Mailer; Post-it® Products, such as Post-it® Flags, Post-it® Note Pads, Post-it® Labeling & Cover-up Tape, and Post-it® Pop-up Notes and Dispensers; construction and home improvement products, including surface-preparation and wood-finishing materials, Command™ Adhesive Products and Filtrete™ Filters for furnaces and air conditioners; home care products, including Scotch-Brite® Scour Pads, Scotch-Brite® Scrub Sponges, Scotch-Brite™ Microfiber Cloth products, O-Cel-O™ Sponges; protective material products, such as Scotchgard™ Fabric Protectors; certain maintenance-free respirators; certain consumer retail personal safety products, including safety glasses, hearing protectors, and 3M™ Thinsulate™ Insulation, which is used in jackets, pants, gloves, hats and boots to keep people warm; Nexcare™ Adhesive Bandages; and ACE® branded (and related brands) elastic bandage, supports and thermometer product lines.

Distribution

3M products are sold through numerous distribution channels, including directly to users and through numerous wholesalers, retailers, jobbers, distributors and dealers in a wide variety of trades in many countries around the world. Management believes the confidence of wholesalers, retailers, jobbers, distributors and dealers in 3M and its products — a confidence developed through long association with skilled marketing and sales representatives — has contributed significantly to 3M’s position in the marketplace and to its growth.

5

Table of Contents

Research and Patents

Research and product development constitutes an important part of 3M’s activities and has been a major driver of 3M’s sales growth. Research, development and related expenses totaled $1.715 billion in 2013, $1.634 billion in 2012 and $1.570 billion in 2011. Research and development, covering basic scientific research and the application of scientific advances in the development of new and improved products and their uses, totaled $1.150 billion in 2013, $1.079 billion in 2012 and $1.036 billion in 2011. Related expenses primarily include technical support provided by 3M to customers who are using existing 3M products; internally developed patent costs, which include costs and fees incurred to prepare, file, secure and maintain patents; amortization of externally acquired patents and externally acquired in-process research and development; and gains/losses associated with certain corporate approved investments in R&D-related ventures, such as equity method effects and impairments.

The Company’s products are sold around the world under various trademarks. The Company also owns, or holds licenses to use, numerous U.S. and foreign patents. The Company’s research and development activities generate a steady stream of inventions that are covered by new patents. Patents applicable to specific products extend for varying periods according to the date of patent application filing or patent grant and the legal term of patents in the various countries where patent protection is obtained. The actual protection afforded by a patent, which can vary from country to country, depends upon the type of patent, the scope of its coverage and the availability of legal remedies in the country.

The Company believes that its patents provide an important competitive advantage in many of its businesses. In general, no single patent or group of related patents is in itself essential to the Company as a whole or to any of the Company’s business segments. The importance of patents in the Electronics and Energy segment is described in “Performance by Business Segment” — “Electronics and Energy Business” in Part II, Item 7, of this Annual Report on Form 10-K.

Raw Materials

In 2013, the Company experienced stable to declining costs for most raw material categories and transportation fuel. This was driven by year-on-year cost decreases in many feedstock categories, including petroleum based materials, minerals, metals and wood pulp based products. To date, the Company is receiving sufficient quantities of all raw materials to meet its reasonably foreseeable production requirements. It is impossible to predict future shortages of raw materials or the impact any such shortages would have. 3M has avoided disruption to its manufacturing operations through careful management of existing raw material inventories and development and qualification of additional supply sources. 3M manages commodity price risks through negotiated supply contracts, price protection agreements and forward physical contracts.

Environmental Law Compliance

3M’s manufacturing operations are affected by national, state and local environmental laws around the world. 3M has made, and plans to continue making, necessary expenditures for compliance with applicable laws. 3M is also involved in remediation actions relating to environmental matters from past operations at certain sites (refer to “Environmental Matters and Litigation” in Note 13, Commitments and Contingencies).

Environmental expenditures relating to existing conditions caused by past operations that do not contribute to current or future revenues are expensed. Reserves for liabilities for anticipated remediation costs are recorded on an undiscounted basis when they are probable and reasonably estimable, generally no later than the completion of feasibility studies or the Company’s commitment to a plan of action. Environmental expenditures for capital projects that contribute to current or future operations generally are capitalized and depreciated over their estimated useful lives.

In 2013, 3M expended about $31 million for capital projects related to protecting the environment. This amount excludes expenditures for remediation actions relating to existing matters caused by past operations that do not contribute to current or future revenues, which are expensed. Capital expenditures for environmental purposes have included pollution control devices — such as wastewater treatment plant improvements, scrubbers, containment structures, solvent recovery units and thermal oxidizers — at new and existing facilities constructed or upgraded in the normal course of business. Consistent with the Company’s policies stressing environmental responsibility, capital expenditures (other than for remediation projects) for known projects are presently expected to be about $54 million over the next two years for new or expanded programs to build facilities or modify manufacturing processes to minimize waste and reduce emissions.

While the Company cannot predict with certainty the future costs of such cleanup activities, capital expenditures or operating costs for environmental compliance, the Company does not believe they will have a material effect on its capital expenditures, earnings or competitive position.

6

Table of Contents

Executive Officers

Following is a list of the executive officers of 3M, and their age, present position, the year elected to their present position and other positions they have held during the past five years. No family relationships exist among any of the executive officers named, nor is there any undisclosed arrangement or understanding pursuant to which any person was selected as an officer. This information is presented in the table below as of the date of the 10-K filing (February 13, 2014).

7

Table of Contents

8

Table of Contents

Cautionary Note Concerning Factors That May Affect Future Results

This Annual Report on Form 10-K, including “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in Item 7, contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The Company may also make forward-looking statements in other reports filed with the Securities and Exchange Commission, in materials delivered to shareholders and in press releases. In addition, the Company’s representatives may from time to time make oral forward-looking statements.

Forward-looking statements relate to future events and typically address the Company’s expected future business and financial performance. Words such as “plan,” “expect,” “aim,” “believe,” “project,” “target,” “anticipate,” “intend,” “estimate,” “will,” “should,” “could” and other words and terms of similar meaning, typically identify such forward-looking statements. In particular, these include, among others, statements relating to

·                  the Company’s strategy for growth, future revenues, earnings, cash flow, uses of cash and other measures of financial performance, and market position,

·                  worldwide economic and capital markets conditions, such as interest rates, foreign currency exchange rates, financial conditions of our suppliers and customers, and natural and other disasters affecting the operations of the Company or our suppliers and customers,

·                  new business opportunities, product development, and future performance or results of current or anticipated products,

·                  the scope, nature or impact of acquisition, strategic alliance and divestiture activities,

·                  the outcome of contingencies, such as legal and regulatory proceedings,

·                  future levels of indebtedness, common stock repurchases and capital spending,

·                  future availability of and access to credit markets,

·                  pension and postretirement obligation assumptions and future contributions, asset impairments, tax liabilities, information technology security, and

·                  the effects of changes in tax, environmental and other laws and regulations in the United States and other countries in which we operate.

The Company assumes no obligation to update or revise any forward-looking statements.

Forward-looking statements are based on certain assumptions and expectations of future events and trends that are subject to risks and uncertainties. Actual future results and trends may differ materially from historical results or those reflected in any such forward-looking statements depending on a variety of factors. Important information as to these factors can be found in this document, including, among others, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” under the headings of “Overview,” “Critical Accounting Estimates” and “Financial Condition and Liquidity.” Discussion of these factors is incorporated by reference from Part I, Item 1A, “Risk Factors,” of this document, and should be considered an integral part of Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” For additional information concerning factors that may cause actual results to vary materially from those stated in the forward-looking statements, see our reports on Form 10-K, 10-Q and 8-K filed with the SEC from time to time.

Item 1A. Risk Factors.

Provided below is a cautionary discussion of what we believe to be the most important risk factors applicable to the Company. Discussion of these factors is incorporated by reference into and considered an integral part of Part II, Item 7, “Management’s Discussion and Analysis of Financial Conditions and Results of Operations.”

* Results are impacted by the effects of, and changes in, worldwide economic and capital markets conditions. The Company operates in more than 70 countries and derives approximately two-thirds of its revenues from outside the United States. The Company’s business is subject to global competition and may be adversely affected by factors in the United States and other countries that are beyond its control, such as disruptions in financial markets, economic downturns in the form of either contained or widespread recessionary conditions, elevated unemployment levels, sluggish or uneven recovery, in specific countries or regions, or in the various industries in which the Company operates; social, political or labor conditions in specific countries or regions; natural and other disasters affecting the operations of the Company or its customers and suppliers; or adverse changes in the availability and cost of capital, interest rates, tax rates, or regulations in the jurisdictions in which the Company operates.

* The Company’s credit ratings are important to 3M’s cost of capital. The major rating agencies routinely evaluate the Company’s credit profile and assign debt ratings to 3M. The Company currently has an AA- credit rating, with a stable

9

Table of Contents

outlook, from Standard & Poor’s and an Aa2 credit rating, with a stable outlook, from Moody’s Investors Service. This evaluation is based on a number of factors, which include financial strength, business and financial risk, as well as transparency with rating agencies and timeliness of financial reporting. The Company’s current ratings have served to lower 3M’s borrowing costs and facilitate access to a variety of lenders. Failure to maintain strong investment grade ratings would adversely affect the Company’s cost of funds and could adversely affect liquidity and access to capital markets.

* The Company’s results are affected by competitive conditions and customer preferences. Demand for the Company’s products, which impacts revenue and profit margins, is affected by (i) the development and timing of the introduction of competitive products; (ii) the Company’s response to downward pricing to stay competitive; (iii) changes in customer order patterns, such as changes in the levels of inventory maintained by customers and the timing of customer purchases which may be affected by announced price changes, changes in the Company’s incentive programs, or the customer’s ability to achieve incentive goals; and (iv) changes in customers’ preferences for our products, including the success of products offered by our competitors, and changes in customer designs for their products that can affect the demand for some of the Company’s products.

* Foreign currency exchange rates and fluctuations in those rates may affect the Company’s ability to realize projected growth rates in its sales and earnings. Because the Company’s financial statements are denominated in U.S. dollars and approximately two-thirds of the Company’s revenues are derived from outside the United States, the Company’s results of operations and its ability to realize projected growth rates in sales and earnings could be adversely affected if the U.S. dollar strengthens significantly against foreign currencies.

* The Company’s growth objectives are largely dependent on the timing and market acceptance of its new product offerings, including its ability to continually renew its pipeline of new products and to bring those products to market. This ability may be adversely affected by difficulties or delays in product development, such as the inability to identify viable new products, obtain adequate intellectual property protection, or gain market acceptance of new products. There are no guarantees that new products will prove to be commercially successful.

* The Company’s future results are subject to fluctuations in the costs and availability of purchased components, compounds, raw materials and energy, including oil and natural gas and their derivatives, due to shortages, increased demand, supply interruptions, currency exchange risks, natural disasters and other factors. The Company depends on various components, compounds, raw materials, and energy (including oil and natural gas and their derivatives) supplied by others for the manufacturing of its products. It is possible that any of its supplier relationships could be interrupted due to natural and other disasters and other events, or be terminated in the future. Any sustained interruption in the Company’s receipt of adequate supplies could have a material adverse effect on the Company. In addition, while the Company has a process to minimize volatility in component and material pricing, no assurance can be given that the Company will be able to successfully manage price fluctuations or that future price fluctuations or shortages will not have a material adverse effect on the Company.

* Acquisitions, strategic alliances, divestitures, and other unusual events resulting from portfolio management actions and other evolving business strategies, and possible organizational restructuring could affect future results. The Company monitors its business portfolio and organizational structure and has made and may continue to make acquisitions, strategic alliances, divestitures and changes to its organizational structure. With respect to acquisitions, future results will be affected by the Company’s ability to integrate acquired businesses quickly and obtain the anticipated synergies.

* The Company’s future results may be affected if the Company generates fewer productivity improvements than estimated. The Company utilizes various tools, such as Lean Six Sigma, to improve operational efficiency and productivity. There can be no assurance that all of the projected productivity improvements will be realized.

* The Company employs information technology systems to support its business, including ongoing phased implementation of an enterprise resource planning (ERP) system on a worldwide basis over the next several years. Security breaches and other disruptions to the Company’s information technology infrastructure could interfere with the Company’s operations, compromise information belonging to the Company and its customers and suppliers, and expose the Company to liability which could adversely impact the Company’s business and reputation. In the ordinary course of business, the Company relies on information technology networks and systems, some of which are managed by third parties, to process, transmit and store electronic information, and to manage or support a variety of business processes and activities. Additionally, the Company collects and stores certain data, including proprietary business information, and may have access to confidential or personal information in certain of our businesses that is subject to privacy and security laws, regulations and customer-imposed controls. Despite our cybersecurity measures (including employee and third-party training, monitoring of networks and systems, and maintenance of backup and protective systems) which are

10

Table of Contents

continuously reviewed and upgraded, the Company’s information technology networks and infrastructure may still be vulnerable to damage, disruptions or shutdowns due to attack by hackers or breaches, employee error or malfeasance, power outages, computer viruses, telecommunication or utility failures, systems failures, natural disasters or other catastrophic events. While we have experienced, and expect to continue to experience, these types of threats to the Company’s information technology networks and infrastructure, none of them to date has had a material impact to the Company. There may be other challenges and risks as the Company upgrades and standardizes its ERP system on a worldwide basis. Any such events could result in legal claims or proceedings, liability or penalties under privacy laws, disruption in operations, and damage to the Company’s reputation, which could adversely affect the Company’s business.

* The Company’s future results may be affected by various legal and regulatory proceedings and legal compliance risks, including those involving product liability, antitrust, environmental, the U.S. Foreign Corrupt Practices Act and other anti-bribery, anti-corruption, or other matters. The outcome of these legal proceedings may differ from the Company’s expectations because the outcomes of litigation, including regulatory matters, are often difficult to reliably predict. Various factors or developments can lead the Company to change current estimates of liabilities and related insurance receivables where applicable, or make such estimates for matters previously not susceptible of reasonable estimates, such as a significant judicial ruling or judgment, a significant settlement, significant regulatory developments or changes in applicable law. A future adverse ruling, settlement or unfavorable development could result in future charges that could have a material adverse effect on the Company’s results of operations or cash flows in any particular period. For a more detailed discussion of the legal proceedings involving the Company and the associated accounting estimates, see the discussion in Note 13 “Commitments and Contingencies” within the Notes to Consolidated Financial Statements.

Item 1B. Unresolved Staff Comments.

None.

Item 2. Properties.

3M’s general offices, corporate research laboratories, and certain division laboratories are located in St. Paul, Minnesota. The Company operates 89 manufacturing facilities in 29 states. The Company operates 127 manufacturing and converting facilities in 38 countries outside the United States.

3M owns the majority of its physical properties. 3M’s physical facilities are highly suitable for the purposes for which they were designed. Because 3M is a global enterprise characterized by substantial intersegment cooperation, properties are often used by multiple business segments.

Item 3. Legal Proceedings.

Discussion of legal matters is incorporated by reference from Part II, Item 8, Note 13, “Commitments and Contingencies,” of this document, and should be considered an integral part of Part I, Item 3, “Legal Proceedings.”

Item 4. Mine Safety Disclosures.

Pursuant to Section 1503 of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”), the Company is required to disclose, in connection with the mines it operates, information concerning mine safety violations or other regulatory matters in its periodic reports filed with the SEC. For the year 2013, the information concerning mine safety violations or other regulatory matters required by Section 1503(a) of the Act is included in Exhibit 95 to this annual report.

11

Table of Contents

PART II

Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Equity compensation plans’ information is incorporated by reference from Part III, Item 12, “Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters,” of this document, and should be considered an integral part of Item 5. At January 31, 2014, there were 91,440 shareholders of record. 3M’s stock is listed on the New York Stock Exchange, Inc. (NYSE), the Chicago Stock Exchange, Inc., and the SWX Swiss Exchange. 3M has historically declared and paid cash dividends in the same quarter. Cash dividends declared totaled $0.635 per share for the first three quarters of 2013. Cash dividends declared in the fourth quarter of 2013 included a dividend payable in November 2013 of $0.635 per share and a dividend payable in March 2014 of $0.855 per share. Cash dividends declared totaled $0.59 per share for each quarter of 2012. Stock price comparisons follow:

Stock price comparisons (NYSE composite transactions)

12

Table of Contents

Issuer Purchases of Equity Securities

Repurchases of 3M common stock are made to support the Company’s stock-based employee compensation plans and for other corporate purposes. In February 2011, 3M’s Board of Directors authorized the repurchase of up to $7.0 billion of 3M’s outstanding common stock, with no pre-established end date. In February 2013, 3M’s Board of Directors replaced the February 2011 repurchase program with a new repurchase program. This new program authorizes the repurchase of up to $7.5 billion of 3M’s outstanding common stock, with no pre-established end date. In February 2014, 3M’s Board of Directors replaced the Company’s February 2013 repurchase program with a new repurchase program. This new program authorizes the repurchase of up to $12 billion of 3M’s outstanding common stock, with no pre-established end date.

Issuer Purchases of Equity Securities

(registered pursuant to Section 12 of the Exchange Act)

(1)         The total number of shares purchased includes: (i) shares purchased under the Board’s authorizations described above, and (ii) shares purchased in connection with the exercise of stock options.

(2)         The total number of shares purchased as part of publicly announced plans or programs includes shares purchased under the Board’s authorizations described above.

13

Table of Contents

Item 6. Selected Financial Data.

3M has historically declared and paid dividends in the same quarter. In December 2013, 3M’s Board of Directors declared a first-quarter 2014 dividend of $0.855 per share (payable in March 2014). This resulted in total year 2013 declared dividends of $3.395 per share, with $2.54 per share paid in 2013 and the additional $0.855 per share to be paid in March 2014.

Items included in the preceding table which had a significant impact on results are summarized as follows. 2010 included a one-time, non-cash income tax charge of $84 million, or 12 cents per diluted share, resulting from the March 2010 enactment of the Patient Protection and Affordable Care Act, including modifications made in the Health Care and Education Reconciliation Act of 2010. 2009 results included net losses that decreased operating income by $194 million and net income attributable to 3M by $119 million. 2009 included restructuring actions ($209 million pre-tax, $128 million after tax and noncontrolling interest), which were partially offset by a gain on sale of real estate ($15 million pre-tax, $9 million after tax).

14

Table of Contents

Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

Management’s Discussion and Analysis of Financial Condition and Results of Operations (MD&A) is designed to provide a reader of 3M’s financial statements with a narrative from the perspective of management. 3M’s MD&A is presented in eight sections:

·                  Overview

·                  Results of Operations

·                  Performance by Business Segment

·                  Performance by Geographic Area

·                  Critical Accounting Estimates

·                  New Accounting Pronouncements

·                  Financial Condition and Liquidity

·                  Financial Instruments

OVERVIEW

3M is a diversified global manufacturer, technology innovator and marketer of a wide variety of products. As described in Note 15 to the Consolidated Financial Statements, effective in the first quarter of 2013, the Company completed a realignment of its business segments to better serve global markets and customers. In addition, during the first quarter of 2013, as described in Note 16, 3M realigned its geographic area structure to include Puerto Rico in the United States rather than in the Latin America/Canada region. Segment and geographic area information presented herein reflects the impact of these changes for all periods presented. 3M manages its operations in five operating business segments: Industrial; Safety and Graphics; Electronics and Energy; Health Care; and Consumer. From a geographic perspective, any references to EMEA refer to Europe, Middle East and Africa on a combined basis.

Fourth-quarter 2013 net income attributable to 3M was $1.103 billion, or $1.62 per diluted share, compared to $991 million, or $1.41 per diluted share, in the fourth quarter of 2012. Fourth-quarter 2013 sales totaled $7.6 billion, an increase of 2.4 percent from the fourth quarter of 2012. 3M achieved organic local-currency sales growth (which includes organic volume and selling price impacts) in all five of its business segments, led by Industrial. Industrial organic local-currency sales increased 5.8 percent, led by advanced materials, automotive OEM, 3M Purification Inc. (filtration products), aerospace, and automotive aftermarket. Organic local-currency sales increased 4.8 percent in Safety and Graphics, led by roofing granules, personal safety, commercial graphics, and architectural markets. Organic local-currency sales grew 3.6 percent in the Health Care business segment, with the strongest sales growth in health information systems, food safety, critical and chronic care, and infection prevention; organic local-currency sales declined in drug delivery systems. Organic local-currency sales increased 1.3 percent in the Consumer business segment, led by the consumer health care and home care businesses. Electronics and Energy organic local-currency sales growth was 0.4 percent, with increases in energy-related sales led by renewable energy and electrical markets. Electronic-related sales declined, with growth in optical systems and electronic solutions more than offset by declines in other businesses. For the Company in total, organic-local currency sales grew 3.4 percent, with higher organic volumes contributing 2.0 percent and selling price increases contributing 1.4 percent. Acquisitions added 0.7 percent to sales, which related to the late November 2012 acquisition of Ceradyne, Inc. Foreign currency translation reduced sales by 1.7 percent year-on-year.

From a geographic area perspective, fourth-quarter 2013 organic local-currency sales growth was 4.5 percent in the United States, 3.4 percent in EMEA, 3.3 percent in Asia Pacific, and 2.2 percent in Latin America/Canada. In the U.S., EMEA, and Asia Pacific, all five business segments generated positive organic local-currency sales growth. Organic local-currency sales growth in the United States was led by Industrial, and Safety and Graphics. Organic local-currency sales growth in EMEA was led by Industrial. West Europe grew organically by 3 percent year-on-year, continuing the positive trends 3M has seen in recent quarters. Organic local-currency sales growth in Asia Pacific was led by Consumer, Safety and Graphics, and Health Care. Sales in Japan grew 4 percent organically. China/Hong Kong grew organically by 1 percent, impacted by a strong prior-year comparison of 16 percent growth in the fourth quarter of 2012 and weakness in electronics. Organic local-currency sales growth in Latin America/Canada was positive across most countries, but below recent trend levels for a few reasons. First, slowing in government tenders for infrastructure projects in certain countries impacted sales in Electronics and Energy. Consumer was also soft in the fourth quarter due to weak retail demand and challenging year-on-year comparisons. And lastly, sales in Venezuela declined year-on-year due to the economic and political situation there. Venezuela diluted fourth-quarter organic sales growth in Latin America/Canada by 1.5 percentage points, as 3M continues to work towards minimizing its Bolivar exposure and any associated costs.

15

Table of Contents

For total year 2013, net income attributable to 3M was $4.659 billion, or $6.72 per diluted share, compared to $4.444 billion, or $6.32 per diluted share, in 2012, an increase of 6.3 percent on a per diluted share basis. Sales totaled $30.9 billion, an increase of 3.2 percent from 2012. From a business segment perspective, organic local-currency sales growth was 5.0 percent in Health Care, 4.6 percent in Industrial, 4.2 percent in Safety and Graphics, 3.0 percent in Consumer, and was flat in Electronics and Energy. From a geographic area perspective, 2013 organic local-currency sales growth was 7.1 percent in Latin America/Canada, 3.6 percent in Asia Pacific, 3.1 percent in the United States, and 2.1 percent in EMEA. For the Company in total, organic local-currency sales grew 3.4 percent, with higher organic volumes contributing 2.5 percent and selling price increases contributing 0.9 percent. Acquisitions added 1.4 percent to sales, driven by the November 2012 acquisition of Ceradyne, Inc. (Industrial), the September 2012 purchase of the net assets that comprised the business of Federal Signal Technologies Group (Safety and Graphics), and the April 2012 acquisition of CodeRyte, Inc. (Health Care). Foreign currency translation reduced sales by 1.6 percent year-on-year.

Operating income in 2013 was 21.6 percent of sales, compared to 21.7 percent of sales in 2012, a decline of 0.1 percentage points. Items that reduced operating income margins included lower factory utilization/productivity, strategic investments (including business transformation, enabled by 3M’s global ERP implementation), the impact of 2012 acquisitions, and other factors. These factors were largely offset by the combination of selling price increases and raw material cost decreases, in addition to lower pension/postretirement benefit costs. Refer to the section entitled “Results of Operations” for further discussion.

The income tax rate was 28.1 percent in 2013, down 0.9 percentage points versus 2012, which increased earnings per diluted share by approximately 9 cents. Weighted-average diluted shares outstanding in 2013 declined 1.4 percent year-on-year to 693.6 million, which increased earnings per diluted share by approximately 9 cents. Foreign exchange impacts decreased earnings per diluted share by approximately 11 cents.

Fourth-quarter 2012 net income attributable to 3M was $991 million, or $1.41 per diluted share, compared to $954 million, or $1.35 per diluted share, in the fourth quarter of 2011. Fourth-quarter 2012 sales totaled $7.4 billion, an increase of 4.2 percent from the fourth quarter of 2011. Organic local-currency sales grew 4.3 percent, acquisitions added 0.9 percent to sales, and foreign currency translation reduced sales by 1.0 percent year-on-year. From a business segment perspective, Consumer led with organic local-currency sales growth of 8.8 percent, driven by consumer health care, construction and home improvement markets, and stationery and office supplies. Health Care organic local-currency sales grew 5.9 percent, with positive growth in all businesses, led by food safety, health information systems, critical and chronic care, and oral care. Electronics and Energy organic local-currency sales growth was 4.4 percent, led by optical systems, with sales also increasing in infrastructure protection, electrical, and telecommunication markets, partially offset by declines in renewable energy and electronics markets materials. Industrial organic local-currency sales grew 4.4 percent, led by 3M Purification Inc. (filtration products), aerospace, industrial adhesives and tapes, abrasives and automotive OEM partially offset by declines in advanced materials. Organic local-currency sales declined 0.3 percent in Safety and Graphics, as sales growth in personal safety, architectural markets, commercial graphics, and roofing granules was offset by a year-on-year decline in traffic safety and security systems.

From a geographic area perspective, fourth-quarter 2012 organic local-currency sales growth was 9.9 percent in Latin America/Canada, 5.8 percent in Asia Pacific, and 5.2 percent in the United States. EMEA organic local-currency sales declined 1.0 percent, impacted by a weak economy in Western Europe. Latin America/Canada sales growth was broad-based, with all five business segments generating positive organic local-currency sales growth, led by Health Care; Safety and Graphics; Electronics and Energy; and Consumer. Organic local-currency sales growth increased 11 percent in Brazil, in the face of a still-recovering economy, and Mexico grew nearly 10 percent. In Asia Pacific, Japan declined year-on-year, reflecting continued challenging economic conditions. Organic local-currency sales in the rest of Asia Pacific grew nearly 10 percent, with China up over 16 percent. Organic local-currency sales growth in the United States was led by Consumer.

For total year 2012, net income attributable to 3M was $4.444 billion, or $6.32 per diluted share, compared to $4.283 billion, or $5.96 per diluted share, in 2011, an increase of 6.0 percent on a per diluted share basis. Sales totaled $29.9 billion, an increase of 1.0 percent from 2011. Organic local-currency sales grew 2.6 percent, acquisitions added 0.8 percent to sales and foreign currency translation reduced sales by 2.4 percent year-on-year. From a business segment perspective, organic local-currency sales growth was 5.2 percent in Industrial, 4.7 percent in Health Care, 3.6 percent in Consumer, and 2.4 percent in Safety and Graphics. Organic local-currency sales declined 3.7 percent in Electronics and Energy. From a geographic area perspective, 2012 organic local-currency sales growth was 11.1 percent in Latin America/Canada, 4.2 percent in the United States, and 0.1 percent in Asia Pacific. Asia Pacific was impacted by a soft global consumer electronics industry. EMEA organic local-currency sales declined 0.6 percent, impacted by a weak economy in Western Europe.

16

Table of Contents

Operating income in 2012 was 21.7 percent of sales, compared to 20.9 percent of sales in 2011, an improvement of 0.8 percentage points. The primary benefit (as discussed in the Results of Operations section) related to the combination of selling price increases and raw material cost decreases. Currency effects reduced diluted earnings per share by an estimated 15 cents. Net insurance recoveries in 2012 related to the 2011 earthquake and tsunami in Japan increased earnings by approximately 4 cents per diluted share. In 2011, the impact of natural disasters, net of insurance recoveries, reduced earnings by approximately 6 cents per diluted share. Early retirement/restructuring costs for 2012 totaled approximately 8 cents per diluted share, which included the first quarter 2012 charge of approximately 3 cents per diluted share related to a voluntary early retirement program in the United States.

The most significant non-operating items that impacted earnings in 2012 when compared to 2011 were diluted shares outstanding and income taxes. Average diluted shares outstanding declined 2.2 percent in 2012 to 703.3 million, which increased earnings per diluted share by approximately 14 cents when compared to 2011. The income tax rate for 2012 was 29.0 percent compared to 27.8 percent in 2011, which decreased earnings per diluted share by approximately 11 cents.

The following table contains sales and operating income results by business segment for the years ended December 31, 2013 and 2012. In addition to the discussion below, refer to the section entitled “Performance by Business Segment” and “Performance by Geographic Area” later in MD&A for a more detailed discussion of the sales and income results of the Company and its respective business segments (including Corporate and Unallocated). Refer to Note 15 for additional information on business segments, including Elimination of Dual Credit.

Sales in 2013 increased 3.2 percent, led by Industrial at 6.5 percent, Health Care at 3.8 percent, and Safety and Graphics at 3.4 percent. Sales increased 1.1 percent in Consumer and declined 1.2 percent in Electronics and Energy. Total company organic local-currency sales growth (which includes organic volume and selling price impacts) was 3.4 percent, acquisitions added 1.4 percent, and foreign currency translation reduced sales by 1.6 percent. Four of 3M’s five business segments posted operating income margins in excess of 21 percent in 2013. Worldwide operating income margins for 2013 were 21.6 percent, compared to 21.7 percent for 2012.

Sales in 2012 increased 1.0 percent, led by Consumer at 3.7 percent, Industrial at 3.3 percent and Health Care at 2.5 percent. Sales increased 0.2 percent in Safety and Graphics, and declined 4.8 percent in Electronics and Energy. Total company organic local-currency sales growth was 2.6 percent, acquisitions added 0.8 percent, and foreign currency translation reduced sales by 2.4 percent. Four of 3M’s five business segments posted operating income margins in excess of 21 percent in 2012. Worldwide operating income margins for 2012 were 21.7 percent, compared to 20.9 percent for 2011.

3M generated $5.817 billion of operating cash flow in 2013, an increase of $517 million when compared to 2012. This followed an increase of $16 million when comparing 2012 to 2011. Refer to the section entitled “Financial Condition and Liquidity” later in MD&A for a discussion of items impacting cash flows. In February 2014, 3M’s Board of Directors authorized the repurchase of up to $12 billion of 3M’s outstanding common stock, which replaced the Company’s February 2013 repurchase program. This new program has no pre-established end date. In 2013, the Company purchased $5.212 billion of stock, up significantly from $2.204 billion in 2012 and $2.701 billion in 2011. The Company expects to purchase $3 billion to $5 billion of stock in 2014. In December 2013, 3M’s Board of Directors declared a first-quarter 2014 dividend of $0.855 per share, an increase of 34.6 percent. This marked the 56th consecutive year of dividend increases for 3M. 3M’s debt to total capital ratio (total capital defined as debt plus equity) was 25 percent at

17

Table of Contents

December 31, 2013, 2012 and 2011. 3M has an AA- credit rating with a stable outlook from Standard & Poor’s and an Aa2 credit rating with a stable outlook from Moody’s Investors Service. The Company has significant cash on hand and sufficient additional access to capital markets to meet its funding needs.

In 2013, the Company experienced stable to declining costs for most raw material categories and transportation fuel. This was driven by year-on-year cost decreases in many feedstock categories, including petroleum based materials, minerals, metals and wood pulp based products. To date the Company is receiving sufficient quantities of all raw materials to meet its reasonably foreseeable production requirements. It is impossible to predict future shortages of raw materials or the impact any such shortages would have. 3M has avoided disruption to its manufacturing operations through careful management of existing raw material inventories and development and qualification of additional supply sources. 3M manages commodity price risks through negotiated supply contracts, price protection agreements and forward physical contracts.

On a worldwide basis, 3M’s pension and postretirement plans were 94 percent funded at year-end 2013. The primary U.S. qualified plan, which is approximately 66 percent of the worldwide pension obligation, was 103 percent funded and the international pension plans were 91 percent funded. The U.S. non-qualified pension plan is not funded due to tax considerations and other factors. Asset returns in 2013 for the primary U.S. qualified plan was 6.02%, as 3M strategically invests in both growth assets and fixed income matching assets to manage its funded status, which improved to 103 percent funded at year-end 2013, compared to 96 percent funded at year-end 2012. For the primary U.S. qualified pension plan, the expected long-term rate of return on an annualized basis for 2014 is 7.75%, a decrease of 0.25 percentage points from 2013. The primary U.S. qualified plan year-end 2013 discount rate was 4.98%, up 0.84 percentage points from the year-end 2012 discount rate of 4.14%. The increase in U.S. discount rates resulted in a lower valuation of the projected benefit obligation, which improved the plans’ funded status. The changes in 3M’s defined benefit plans’ funded status significantly impacted several balance sheet amounts. In the fourth-quarter of 2013, these required annual measurements increased stockholders’ equity by $0.9 billion, decreased pension and postretirement benefits’ long-term liabilities by $0.8 billion, increased prepaid pension benefits’ assets by $0.5 billion, and decreased deferred taxes within other assets by $0.4 billion. Other pension and postretirement changes during the year, such as contributions and amortization, also impacted these balance sheet amounts.

3M expects to contribute approximately $100 million to $200 million of cash to its global pension and postretirement plans in 2014. The Company does not have a required minimum cash pension contribution obligation for its U.S. plans in 2014. 3M expects defined benefit pension and postretirement expense in 2014 to decrease by approximately $160 million pre-tax when compared to 2013. The change in both defined benefit and defined contribution plan expenses would increase earnings per share in 2014 by approximately 15 cents per share when compared to 2013, or approximately 17 cents per share including the impact of defined benefit plan expenses only. Refer to “Critical Accounting Estimates” within MD&A and Note 10 (Pension and Postretirement Benefit Plans) for additional information concerning 3M’s pension and post-retirement plans. In addition, 3M currently expects that its effective tax rate for 2014 will be approximately 28.0 to 29.0 percent, compared to 28.1 percent for 2013.

Forward-looking statements in Item 7 may involve risks and uncertainties that could cause results to differ materially from those projected (refer to the section entitled “Cautionary Note Concerning Factors That May Affect Future Results” in Item 1 and the risk factors provided in Item 1A for discussion of these risks and uncertainties).

18

Table of Contents

RESULTS OF OPERATIONS

Net Sales:

In 2013, organic local-currency sales grew 3.4 percent, with increases of 7.1 percent in Latin America/Canada, 3.6 percent in Asia Pacific, 3.1 percent in the United States, and 2.1 percent in Europe, Middle East and Africa. Worldwide organic local-currency sales grew 5.0 percent in Health Care, 4.6 percent in Industrial, 4.2 percent in Safety and Graphics, 3.0 percent in Consumer, and were flat in Electronics and Energy. Acquisitions added 1.4 percent to worldwide growth and foreign currency translation reduced worldwide sales growth by 1.6 percent.

Worldwide selling prices rose 0.9 percent in 2013 and 1.4 percent in 2012. Selling price increases were driven by two primary factors in both 2013 and 2012. First, investment in research and development continues to support a strong price/value equation in many of the markets that 3M serves. Second, 3M adjusts selling prices to offset currency devaluations in certain developing countries. These increases have more than offset selling price declines in 3M’s optical systems business, where prices typically decline each year, which is common for the electronics industry.

In 2012, organic local-currency sales increased 2.6 percent. Organic local-currency sales growth was led by Latin America/Canada and the United States, while Asia Pacific was flat, and EMEA was down slightly. Worldwide organic local-currency sales grew 5.2 percent in Industrial, 4.7 percent in Health Care, 3.6 percent in Consumer, and 2.4 percent in Safety and Graphics. Organic local-currency sales declined 3.7 percent in Electronics and Energy. Acquisitions added 0.8 percent to worldwide growth and foreign currency translation reduced 2012 worldwide sales growth by 2.4 percent.

Refer to the sections entitled “Performance by Business Segment” and “Performance by Geographic Area” later in MD&A for additional discussion of sales change.

19

Table of Contents

Operating Expenses:

Pension and postretirement expense decreased $97 million in 2013 compared to 2012, compared to an increase of $95 million for 2012 compared to 2011. 2012 includes a $26 million charge related to the first-quarter 2012 voluntary early retirement incentive program (discussed in Note 10). Pension and postretirement expense is recorded in cost of sales; selling, general and administrative expenses (SG&A); and research, development and related expenses (R&D). Refer to Note 10 (Pension and Postretirement Plans) for components of net periodic benefit cost and the assumptions used to determine net cost.

Cost of Sales:

Cost of sales includes manufacturing, engineering and freight costs.

Cost of sales, measured as a percent of net sales, was 52.1 percent in 2013, a decrease of 0.3 percentage points from 2012. Cost of sales as a percent of sales decreased due to the combination of selling price increases and raw material cost decreases, as selling prices rose 0.9 percent and raw material cost deflation was approximately 2 percent favorable year-on-year. In addition, lower pension and postretirement costs (of which a portion impacts cost of sales), in addition to organic volume increases, decreased cost of sales as a percent of sales. These benefits were partially offset by the impact of 2012 acquisitions and lower factory utilization.

Cost of sales, measured as a percent of net sales, was 52.4 percent in 2012, a decrease of 0.6 percentage points from 2011. The net impact of selling price/raw material cost changes was the primary factor that decreased cost of sales as a percent of sales, as selling prices increased 1.4 percent and raw material costs decreased approximately 2 percent. This benefit was partially offset by higher pension and postretirement costs.

Selling, General and Administrative Expenses:

Selling, general and administrative expenses (SG&A) increased $282 million, or 4.6 percent, in 2013 when compared to 2012. In 2013, SG&A included strategic investments in business transformation, enabled by 3M’s global enterprise resource planning (ERP) implementation, in addition to increases from acquired businesses that were largely not in 3M’s 2012 spending (Ceradyne, Inc. and Federal Signal Technologies), which were partially offset by lower pension and postretirement expense. SG&A, measured as a percent of sales, increased 0.3 percentage points to 20.7 percent in 2013, compared to 20.4 percent in 2012.

SG&A decreased $68 million, or 1.1 percent, in 2012 when compared to 2011. In addition to cost-control and other productivity efforts, 3M experienced some savings from its first-quarter 2012 voluntary early retirement incentive program and other restructuring actions. These benefits more than offset increases related to acquisitions, higher year-on-year pension and postretirement expense, and restructuring expenses. SG&A in 2012 included increases from acquired businesses which were not in 3M’s full-year 2011 base spending, primarily related to the 2011 acquisitions of Winterthur Technologie AG and the do-it-yourself and professional business of GPI Group, in addition to SG&A spending related to the 2012 acquisitions of Ceradyne, Inc., Federal Signal Technologies Group, and CodeRyte, Inc. SG&A, measured as a percent of sales, was 20.4 percent in 2012, a decrease of 0.4 percentage points when compared to 2011.

Research, Development and Related Expenses:

Research, development and related expenses (R&D) increased 4.9 percent in 2013 compared to 2012 and increased 4.1 percent in 2012 compared to 2011, as 3M continued to support its key growth initiatives, including more R&D aimed at disruptive innovation. In 2013, increases from acquired businesses that were largely not in 3M’s 2012 spending (primarily Ceradyne, Inc. and Federal Signal Technologies) were partially offset by lower pension and postretirement expense. In

20

Table of Contents

2012, investments to support key growth initiatives, along with higher pension and postretirement expense, were partially offset by cost-control efforts and savings from 3M’s first-quarter 2012 voluntary early retirement incentive program. R&D, measured as a percent of sales, was 5.6 percent in 2013, compared to 5.5 percent in 2012 and 5.3 percent in 2011.

Operating Income:

3M uses operating income as one of its primary business segment performance measurement tools.

Operating income margins were 21.6 percent in 2013, compared to 21.7 in 2012, a decrease of 0.1 percentage points. Items that reduced operating income margins included a 0.5 percentage point impact from lower factory utilization/productivity, along with a 0.4 percentage point impact from the combination of business transformation, enabled by 3M’s global ERP implementation, along with more R&D aimed at disruptive innovation. The recently enacted medical device excise tax in the U.S., foreign currency effects, acquisition impacts, and other net impacts reduced operating income margins by 0.7 percentage points. These factors were largely offset by items that increased operating income margins, which included a 1.2 percentage point benefit from the combination of selling price increases and raw material cost decreases. Finally, lower pension/postretirement benefit costs increased operating income margins by 0.3 percentage points.

Operating income was 21.7 percent of sales in 2012, compared to 20.9 percent of sales in 2011, an improvement of 0.8 percentage points. The improvement was driven by a 1.6 percentage point benefit from the combination of selling price increases and raw material cost decreases. This was partially offset by increased pension/postretirement benefit costs and acquisition impacts, each of which reduced margins by 0.3 percentage points, and other net impacts, which decreased margins by 0.2 percentage points.

Interest Expense and Income:

Interest Expense: Interest expense decreased in both 2013 and 2012. The 2013 decrease was primarily due to lower interest rates. The 2012 decrease was driven by lower average international debt balances and lower interest rates on U.S. debt.

Interest Income: Interest income was up $2 million when comparing 2013 to 2012, as higher average international cash balances were largely offset by lower average U.S. balances and lower U.S. and international interest rates. In 2012, lower U.S. cash balances and lower interest rates internationally were offset by higher international cash balances and higher interest rates in the U.S.

Provision for Income Taxes:

The effective tax rate for 2013 was 28.1 percent, compared to 29.0 percent in 2012, a decrease of 0.9 percentage points, impacted by many factors. Factors that decreased the Company’s effective tax rate included international taxes as a result of changes to the geographic mix of income before taxes, the reinstatement of the U.S. research and development credit in 2013, an increase in the domestic manufacturer’s deduction benefit, the restoration of tax basis on certain assets for which depreciation deductions were previously limited, and other items. Combined, these factors decreased the Company’s effective tax rate by 4.0 percentage points. This benefit was partially offset by factors that increased the effective tax rate by 3.1 percentage points, which largely related to adjustments to 3M’s income tax reserves for 2013 when compared to 2012.

The effective tax rate for 2012 was 29.0 percent, compared to 27.8 percent in 2011, an increase of 1.2 percentage points, impacted by many factors. The primary factors that increased the Company’s effective tax rate year-on-year include international taxes, specifically with respect to the corporate reorganization of a wholly owned international subsidiary (which benefited 2011), state income taxes, lower domestic manufacturer’s deduction, and the lapse of the U.S. research and development credit. These and other factors, when compared to 2011, increased the 2012 effective tax rate by 2.1 percentage points. Factors that decreased the Company’s effective tax rate year-on-year include international taxes as a

21

Table of Contents

result of changes to the geographic mix of income before taxes and adjustments to its income tax reserves. These factors, when compared to 2011, decreased the effective tax rate 0.9 percentage points.

The Company currently expects that its effective tax rate for total year 2014 will be approximately 28.0 to 29.0 percent. The rate can vary from quarter to quarter due to discrete items, such as the settlement of income tax audits and changes in tax laws, as well as recurring factors, such as the geographic mix of income before taxes.

Refer to Note 7 for further discussion of income taxes.

Net Income Attributable to Noncontrolling Interest:

Net income attributable to noncontrolling interest represents the elimination of the income or loss attributable to non-3M ownership interests in 3M consolidated entities. The changes in noncontrolling interest amounts are primarily related to Sumitomo 3M Limited (Japan), which is 3M’s most significant consolidated entity with non-3M ownership interests. As of December 31, 2013, 3M’s effective ownership in Sumitomo 3M Limited is 75 percent.

Currency Effects:

3M estimates that year-on-year currency effects, including hedging impacts, decreased net income attributable to 3M by approximately $74 million and $103 million in 2013 and 2012, respectively. These estimates include the effect of translating profits from local currencies into U.S. dollars; the impact of currency fluctuations on the transfer of goods between 3M operations in the United States and abroad; and transaction gains and losses, including derivative instruments designed to reduce foreign currency exchange rate risks and the negative impact of swapping Venezuelan bolivars into U.S. dollars. 3M estimates that year-on-year derivative and other transaction gains and losses decreased net income attributable to 3M by approximately $12 million in 2013 and increased net income attributable to 3M by approximately $49 million in 2012.

22

Table of Contents

PERFORMANCE BY BUSINESS SEGMENT

Disclosures relating to 3M’s business segments are provided in Item 1, Business Segments. Financial information and other disclosures are provided in the Notes to the Consolidated Financial Statements. As discussed in Note 15, effective in the first quarter of 2013, the Company completed a realignment of its business segments to better serve global markets and customers. Segment information presented herein reflects the impacts of these changes for all periods presented. The reportable segments are Industrial; Safety and Graphics; Electronics and Energy; Health Care; and Consumer. Information related to 3M’s business segments is presented in the tables that follow. Organic local-currency sales include both organic volume impacts plus selling price impacts. Acquisition impacts, if any, are measured separately for the first twelve months of the acquisition. The divestiture impacts, if any, foreign currency translation impacts and total sales change are also provided for each business segment. Any references to EMEA relate to Europe, Middle East and Africa on a combined basis.

Corporate and Unallocated:

In addition to these five operating business segments, 3M assigns certain costs to “Corporate and Unallocated,” which is presented separately in the preceding business segments table and in Note 15. Corporate and Unallocated includes a variety of miscellaneous items, such as corporate investment gains and losses, certain derivative gains and losses, certain insurance-related gains and losses, certain litigation and environmental expenses, corporate restructuring charges and certain under- or over-absorbed costs (e.g. pension, stock-based compensation) that the Company may choose not to allocate directly to its business segments. Because this category includes a variety of miscellaneous items, it is subject to fluctuation on a quarterly and annual basis.

Corporate and Unallocated operating expenses decreased by $149 million in 2013 when compared to 2012. Of the $149 million decrease in 2013, approximately $127 million was due to lower pension and postretirement benefit expense. The primary items driving the $51 million increase in Corporate and Unallocated in 2012 when compared to 2011 were pension and postretirement expense, as a portion of the 2012 increase in these expenses were not allocated directly to the five operating business segments ($63 million), partially offset by an increase in other environmental insurance receivables, which benefited 2012 by $15 million (as discussed in Note 13).

Operating Business Segments:

All five business segments, when comparing 2013 to 2012, were impacted by investments in business transformation, which are enabled by 3M’s global ERP implementation, and by higher allocated pension and postretirement benefit expenses. The implementation of 3M’s ERP system has increased spending in total, and the transition of 3M’s ERP system from the development stage into deployment has also resulted in more ERP costs being borne by the five operating business segments rather than Corporate and Unallocated. This negatively impacted each business segment’s annual 2013 operating income margins by approximately 0.30 percentage points when compared to 2012. 3M’s pension and postretirement benefit expenses declined $97 million when comparing 2013 to 2012; however, $127 million of this reduction was allocated to Corporate and Unallocated, resulting in $30 million of additional expense being absorbed by the five operating business segments in 2013, or a negative year-on-year impact of approximately 0.10 percentage points. Thus, while operating income margins have declined when comparing 2013 to 2012 for all five business segments, on average approximately 0.40 percentage points of this decline relates to the impact of higher ERP implementation expenses and higher pension and postretirement benefit expenses. When comparing 2012 to 2011, operating business segment results reflect $32 million in higher year-on-year pension and postretirement benefit expenses.

The following discusses total year results for 2013 compared to 2012, and also discusses 2012 compared to 2011, for each business segment.

23

Table of Contents

Industrial Business (34.3% of consolidated sales):

The Industrial segment serves a broad range of markets, such as automotive original equipment manufacturer (OEM) and automotive aftermarket (auto body shops and retail), electronics, appliance, paper and printing, packaging, food and beverage, and construction. Industrial products include tapes, a wide variety of coated, non-woven and bonded abrasives, adhesives, advanced ceramics, sealants, specialty materials, 3M Purification Inc. (filtration products), closure systems for personal hygiene products, acoustic systems products, and components and products that are used in the manufacture, repair and maintenance of automotive, marine, aircraft and specialty vehicles.

Year 2013 results:

Sales in Industrial totaled $10.6 billion, up 6.5 percent in U.S. dollars. Organic local-currency sales increased 4.6 percent, acquisitions added 3.6 percent, and foreign currency translation reduced sales by 1.7 percent. On an organic local-currency basis, all of Industrial’s businesses experienced positive sales growth in 2013, led by aerospace, automotive OEM, 3M Purification Inc. (filtration products), and industrial adhesives and tapes. Acquisition growth related to the 2012 acquisition of Ceradyne, Inc. (Ceradyne). As disclosed in Note 2, in November 2012, 3M acquired Ceradyne, which is headquartered in Costa Mesa, California. Ceradyne 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.

Geographically, organic local-currency sales increased 8 percent in Latin America/Canada, 5 percent in the United States, 4 percent in EMEA, and 3 percent in Asia Pacific.

Operating income was $2.3 billion in 2013, up 2.7 percent year-on-year. Operating income margins decreased by 0.8 percentage points to 21.7 percent. This decline in margins largely related to the Ceradyne acquisition, which reduced 2013 operating income margins by 0.7 percentage points.

Year 2012 results:

Sales in Industrial totaled $9.9 billion, up 3.3 percent in U.S. dollars. Organic local-currency sales increased 5.2 percent, acquisitions added 1.1 percent, and foreign currency translation reduced sales by 3.0 percent. Acquisitions growth was primarily driven by Winterthur Technologie AG (Winterthur) in the abrasives market, Ceradyne, Inc. (Ceradyne) in the advanced technical ceramics market, and Alpha Beta Enterprise Co. Ltd. (Alpha Beta) in industrial tapes, all of which are discussed further below. On an organic local-currency basis, sales growth was strongest in automotive OEM, aerospace, abrasives and 3M Purification Inc.

Geographically, organic local-currency sales increased 8 percent in the United States, 7 percent in Latin America/Canada, 5 percent in Asia Pacific, and 1 percent in EMEA.

Operating income was $2.2 billion in 2012, 12.8 percent higher than 2011, with the primary benefit related to the combination of selling price increases and raw material cost decreases. Operating income growth was led by the United States. Operating income margins increased by 1.9 percentage points to 22.5 percent.

3M continued to invest in its Industrial business. In November 2012, 3M acquired Ceradyne. In March 2011, 3M acquired a controlling interest in Winterthur via completion of a public tender offer. Winterthur, based in Zug, Switzerland, is a leading global supplier of precision grinding technology serving customers in the area of hard-to-grind precision applications in industrial, automotive, aircraft, and cutting tools. In addition, in February 2011, 3M completed its acquisition

24

Table of Contents

of the tape-related assets of Alpha Beta, a leading manufacturer of box sealing tape and masking tape headquartered in Taipei, Taiwan.

Investment:

In March 2005, 3M’s automotive business completed the purchase of 19 percent of TI&M Beteiligungsgesellschaft mbH (TI&M) for approximately $55 million. TI&M is the parent company of I&T Innovation Technology Entwicklungsund Holding Aktiengesellschaft (I&T), an Austrian maker of flat flexible cable and circuitry. Pursuant to a Shareholders Agreement, 3M marketed I&T’s flat flexible wiring systems for automotive interior applications to the global automotive market. I&T filed a petition for bankruptcy protection in August 2006. As part of its agreement to purchase the shares of TI&M, the Company was granted a put option that gave the Company the right to sell back its entire ownership interest in TI&M to the other investors from whom the Company acquired its 19 percent interest. The put option became exercisable January 1, 2007. The Company exercised the put option and recovered approximately $25 million of its investment from one of the investors based in Belgium in February 2007. The other two TI&M investors from whom the Company purchased its shares filed a bankruptcy petition in Austria in January 2007. Through the Austrian bankruptcy process and pursuit of recovery from the bank that held the 3M purchase price paid to the two bankrupt investors, 3M recovered all but an immaterial amount of the remaining investment through October 2013 at which point 3M resolved its remaining claims.

25

Table of Contents

Safety and Graphics Business (18.3% of consolidated sales):

The Safety and Graphics segment serves a broad range of markets that increase the safety, security and productivity of people, facilities and systems. Major product offerings include personal protection products; traffic safety and security products, including border and civil security solutions; commercial graphics sheeting and systems; architectural surface and lighting solutions; cleaning and protection products for commercial establishments, and roofing granules for asphalt shingles.

Year 2013 results:

Sales in Safety and Graphics totaled $5.7 billion, up 3.4 percent in U.S. dollars. Organic local-currency sales increased 4.2 percent, acquisitions added 1.3 percent, and foreign currency translation reduced sales by 2.1 percent. On an organic local-currency basis, sales growth was led by personal safety, commercial graphics, industrial minerals, and building and commercial services. Organic local-currency sales declined in traffic safety and security systems. Acquisition growth related to the September 2012 purchase of net assets that comprised the business of Federal Signal Technologies Group.

Organic local-currency sales increased 9 percent in both Latin America/Canada and Asia Pacific, and 2 percent in the United States. Organic local-currency sales were flat in EMEA.

Operating income in 2013 totaled $1.2 billion, up 1.8 percent. Operating income margins were 21.9 percent of sales, compared to 22.3 percent in 2012. This decline in margins related to the Federal Signal Technologies Group acquisition, which reduced 2013 operating income margins by 0.5 percentage points.

Year 2012 results:

Sales in Safety and Graphics were $5.5 billion, up 0.2 percent in U.S. dollars. Organic local-currency sales increased 2.4 percent, led by architectural markets, personal safety, and commercial graphics, with growth also in building and commercial services, and roofing granules. Organic local-currency sales declined in traffic safety and security. Acquisitions sales growth of 0.6 percent related to the September 2012 purchase of the net assets that comprised the business of Federal Signal Technologies Group from Federal Signal Corp. This business focuses on electronic toll collection and parking management hardware and software services. Foreign currency translation reduced sales by 2.8 percent.

Geographically, organic local-currency sales increased 16 percent in Latin America/Canada and 1 percent in both the United States and Asia Pacific. Organic local-currency sales declined 2 percent in EMEA.

Operating income in 2012 totaled $1.2 billion, down 1.6 percent. Operating income margins were 22.3 percent of sales, compared to 22.7 percent in 2011. The year-on-year decline in operating income dollars and margins was attributable to softness in traffic safety and security, which has been impacted by lower government spending.

26

Table of Contents

Electronics and Energy Business (17.5% of consolidated sales):

The Electronics and Energy segment serves customers in the electronics and energy markets, including solutions for dependable, cost-effective, high-performance electronic devices, telecommunications networks, electrical products, power generation and distribution, and infrastructure protection. This segment’s electronics solutions include optical film solutions for the electronic display industry; packaging and interconnection devices; high performance fluids and abrasives; high-temperature and display tapes; 3M™ Flexible Circuits, which use electronic packaging and interconnection technology; and the touch systems business, which includes touch screens, touch monitors, and touch sensor components. This segment’s energy solutions include pressure sensitive tapes and resins; electrical insulation; a wide array of fiber-optic and copper-based telecommunications systems; renewable energy component solutions for the solar and wind power industries; and infrastructure products that provide both protection and detection solutions.

The optical film business provides films that serve numerous market segments of the electronic display industry. 3M provides distinct products for five market segments, including products for: 1) LCD computer monitors 2) LCD televisions 3) handheld devices such as cellular phones and tablets 4) notebook PCs and 5) automotive displays. The optical business includes a number of different products that are protected by various patents and groups of patents. These patents provide varying levels of exclusivity to 3M for a number of such products. As some of 3M’s multi-layer optical film patents expired at the end of 2013 and will expire over several years thereafter, 3M will likely see more competition in these products. 3M continues to innovate in the area of optical films and files patents on its new technology and products. 3M’s proprietary manufacturing technology and know-how also provide a competitive advantage to 3M independent of its patents.

Year 2013 results:

Electronics and Energy sales totaled $5.4 billion, down 1.2 percent in U.S. dollars, with this decrease related to foreign currency translation. Organic local-currency sales were flat in 3M’s electronics-related businesses, with increases in touch systems and optical systems offset by decreases in electronics markets materials. Organic local-currency sales were also flat in 3M’s energy-related businesses, where sales gains in electrical markets were offset by sales declines in infrastructure protection, telecommunication markets, and renewable energy.

On a geographic basis, organic local-currency sales increased slightly in Latin America/Canada and Asia Pacific. Organic local-currency sales declined slightly in the United States and EMEA.

Operating income decreased 7.0 percent to $954 million in 2013. Operating income margins were 17.7 percent, compared to 18.8 percent in 2012. The operating margin decline was primarily attributable to lower factory utilization and flat year-on-year organic local-currency sales.

Year 2012 results:

Electronics and Energy sales totaled $5.5 billion, down 4.8 percent in U.S. dollars. Organic local-currency sales declined 3.7 percent and foreign currency translation reduced sales by 1.1 percent. Organic local-currency sales declined in the consumer electronics-related businesses, including a 9 percent decline in optical systems, driven by lower optical film volumes for LCD TVs. In addition, organic local-currency sales declined in the renewable energy and telecommunications markets business. Organic local-currency sales increased in 3M’s touch systems, infrastructure protection, and electrical markets businesses.

On a geographic basis, organic local-currency sales increased 14 percent in Latin America/Canada and 3 percent in the United States. Organic local-currency sales declined 6 percent in EMEA and 7 percent in Asia Pacific.

27

Table of Contents

Operating income decreased 10.0 percent to $1.0 billion in 2012. Operating income margins were 18.8 percent, compared to 19.9 percent in 2011. The year-on-year decline was largely attributable to the decline in optical systems.

Health Care Business (17.3% of consolidated sales):