MMM 3M Company

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 11-K

(Mark One)

x                              ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 [NO FEE REQUIRED]

For the fiscal year ended December 31, 2014

OR

o                                 TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 [NO FEE REQUIRED]

For the transition period from                      to

Commission File Number 1-3285

A.            Full title of the plan and address of the plan, if different from that of the issuer named below:

3M Savings Plan

B.    Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:

3M COMPANY

3M Center

St. Paul, Minnesota

55144-1000

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3M Savings Plan

Index to Financial Statements

Note:  Other schedules required by Section 2520.103-10 of the Department of Labor’s Rules and Regulations for Reporting and Disclosures under the Employee Retirement Income Security Act (“ERISA”) of 1974 have been omitted because they are not applicable.

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Plan Administrator

3M Savings Plan

Maplewood, Minnesota

We have audited the accompanying statement of net assets available for benefits of 3M Savings Plan (the Plan) as of December 31, 2014 and the related statement of changes in net assets available for benefits for the year then ended. The financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audit.

We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Plan’s internal control over financial reporting. Accordingly, we express no such opinion. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of 3M Savings Plan as of December 31, 2014 and the changes in net assets available for benefits for the year ended December 31, 2014 in conformity with accounting principles generally accepted in the United States of America.

The supplemental schedule of assets (held at end of year) (supplemental information) has been subjected to audit procedures performed in conjunction with the audit of the Plan’s financial statements. The supplemental information is the responsibility of the Plan’s management. Our audit procedures included determining whether the supplemental information reconciles to the financial statements or the underlying accounting and other records, as applicable and performing procedures to test the completeness and accuracy of the information presented in the supplemental information. In forming our opinion on the supplemental information, we evaluated whether the supplemental information, including its form and content, is presented in conformity with the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. In our opinion, the supplemental information is fairly stated, in all material respects, in relation to the financial statements as a whole.

CliftonLarsonAllen LLP

Minneapolis, Minnesota

June 29, 2015

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Report of Independent Registered Public Accounting Firm

To the Participants and Administrator of the 3M Savings Plan:

In our opinion, the accompanying statements of net assets available for benefits and the related statements of changes in net assets available for benefits present fairly, in all material respects, the net assets available for benefits of the 3M Savings Plan (the “Plan”) at December 31, 2013, and the changes in net assets available for benefits for the year ended December 31, 2013  in conformity with accounting principles generally accepted in the United States of America. These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audit. We conducted our audits of these statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion.

/s/PricewaterhouseCoopers LLP

Minneapolis, MN

June 26, 2014, except for the effects of the restatement discussed in Note 2 (not presented herein) to the consolidated financial statements appearing in the Plan’s Annual Report on Form 11-K/A (Amendment No. 1), as to which the date is June 29, 2015

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3M Savings Plan

Statements of Net Assets Available for Benefits

At December 31, 2014 and 2013

The accompanying notes are an integral part of the financial statements.

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3M Savings Plan

Statements of Changes in Net Assets Available for Benefits

For the years ended December 31, 2014 and 2013

The accompanying notes are an integral part of the financial statements.

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3M Savings Plan

Notes to Financial Statements

1.              Description of Plan

The following description of the 3M Savings Plan (the Plan) is provided for general information purposes only.  Participants should refer to the Summary Plan Description and Plan document for a more complete description of the Plan’s provisions.

General

Effective October 1, 1988, 3M Company and its subsidiaries (3M or the Company) created the 3M Savings Plan for union employees.  Substantially all active United States regular full-time and part-time union employees of 3M who have been employed for at least three continuous months, are eligible to participate if this benefit has been bargained for in their respective collective bargaining agreement.  The Plan is a defined contribution plan and is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (ERISA).

Contributions

Contributions are made by participating employees and by 3M.

Participant Contributions

The Plan is comprised of accounts for participants: the Before-Tax Account 401(k) Account, Roth 401(k) Account, the After-Tax Savings Account and the Rollover Accounts.  Participants may contribute to the 401(k) Accounts (Before-Tax and/or Roth) and/or After-Tax Savings Account, or to all three accounts.  Participants may contribute from 2% to 20% of their compensation to the 401(k) Accounts  through salary deferrals, not to exceed the Internal Revenue Service (IRS) limits (10% maximum for employees whose annual compensation is in excess of certain IRS-related limits).  Also, subject to overall Plan and IRS limitations, participants may contribute 2% to 9% of their compensation to the After-Tax Savings Account.  The Rollover Accounts accept direct rollover or eligible rollover contributions from a former employer’s qualified plan.  Effective July 1, 2014, the Plan also accepts rollovers of lump sum payments from Employee Retirement Income Plan of Minnesota Mining and Manufacturing Company, the employer’s qualified pension plan.  Participants who have attained age 50 before the end of the plan year are eligible to make catch up contributions to their 401(k) Accounts (Before-Tax and/or Roth), subject to Internal Revenue Service limits. Catch-up contributions are not eligible for Company matching contributions.

Newly hired employees are automatically enrolled in the Plan three months after their hire date at a default before-tax contribution rate of 6% with contributions invested 100% in the LifePath® Portfolio closest to the year in which the participant will reach age 65.  Effective July 1, 2013, auto-escalation was added to the new hire enrollment with contribution rate increasing by 1% each year up to a maximum of 10%.  Effective April 1, 2014, participants currently contributing less than 6% of their compensation were automatically enrolled at 6%.  In addition, participants automatically enrolled will have their default percentage increased by 1% each year up to a maximum of 10% of compensation beginning as soon as administratively possible on or after April 1, in the plan year following the plan year they were enrolled.  Employees can enroll, decline or change their contribution rate or investment elections at any time.

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3M Savings Plan

Notes to Financial Statements

1.              Description of Plan, continued

Company Contributions

Pursuant to the terms of various collective bargaining agreements, 3M may make matching contributions to the Plan from 35% to 100% of the eligible participants’ 401(k) Accounts contribution (up to the first 6% of salary deferrals).  In addition, those participants (dependent on the specific collective bargaining unit agreement and membership) hired or rehired January 1, 2009 or later receive a non-elective Company contribution (Retirement Income Account (RIA)) made in cash.  The percent of the non-elective Company contribution is determined by the collective bargaining agreement 3M employer contributions are made in the form of shares of 3M common stock or cash to the Company Match Account.  3M matching contributions made in cash are directed into the non-Roth investment selections made by the participant.  If the employee has not made an investment election then the Company contributions default to the 3M LifePath® Portfolio with the target year closest to the year in which the employee will reach age 65 years. 3M matching contributions that are made in 3M common stock are made to a non-participant directed Company Match Account.  Fully vested participants (see the following paragraph which details the Plan’s vesting provisions) are eligible to diversify/transfer up to 100 percent of their Company contribution balance in 3M common stock fund and diversify into other investment options.

Vesting

Participants are immediately fully vested in their own contributions to the Plan, plus any earnings thereon.  Each participant’s interest in 3M matching contributions vests at 40% after one year of service, 70% after 2 years of service and 100% vesting after three years of service.   If a participant terminates employment before being fully vested, the nonvested portion of the Company Match Account or the RIA will be forfeited.

Participant Accounts

Each participant’s account is credited with the participant’s contribution and allocations of (a) the Company’s contribution and (b) Plan earnings, and charged with an allocation of administrative expenses. Allocations are based on participant earnings or account balances, as defined. The benefit to which a participant is entitled is the benefit that can be provided from the participant’s vested account.

Forfeitures

Forfeitures of nonvested account balances are used to reduce future Plan administrative expenses or Company contributions.  At December 31, 2014 and 2013, forfeited nonvested accounts totaled $120,542 and $62,616.

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3M Savings Plan

Notes to Financial Statements

1.              Description of Plan, continued

Withdrawals

Subject to certain federal tax considerations, participants may withdraw funds from the After-Tax Savings account or Rollover account at any time.  Participants may withdraw funds from the 401(k) Accounts (Before-Tax 401(k) and Roth 401(k)), Company Match Account, Payroll-based Employee Stock Ownership Program (PAYSOP) Account, Other Company Contribution Account (CCA) and Profit Sharing Account when specific conditions are met.  These conditions include reaching age 59 1/2, termination of employment (including retirement), become permanently and totally disabled and are receiving Social Security Disability Income.

A participant who has common shares of 3M stock in their Savings account and is eligible to request a withdrawal may choose to receive the value of the 3M stock in cash or in actual shares of 3M common stock with a cash payment for any fractional shares.

Investment of Funds

Participants can make initial investment elections, reallocate the investment of their current accounts or change the way their future contributions will be invested.  If the request is made before the close of market on a day in which the stock market is open, the changes will be effective that same business day at the closing prices of that day.  If the request is received after the close of market or a day the stock market is closed then the changes will be effective at the closing prices on the next business day when the market is open.

Participants are to elect to direct the transfer of any portion of the Participant’s existing balance in his or her Accounts from any Fund or Funds into the 3M Stock Fund to a maximum of 25% of his/her total account balance.

Notes Receivable from Participants

Participants may borrow against their 401(k) Accounts and Rollover Account balance.  The maximum amount of a participant’s loan may not exceed 50% of the combined total of their 401(k) Accounts (Before-Tax and Roth)  and Rollover Accounts balance and vested portion of their Company Match Account and RIA minus current outstanding loan balance, $50,000 less the highest outstanding loan balance in the last 12 months or the 401(k) Account (Before-Tax and Roth) and Rollover Accounts balance in all investment funds (excluding 3M Stock and The Schwab Personal Choice Retirement Account® (PCRA)) minus $1,000 when the participant has an open balance in the self-directed brokerage PCRA.  Loan repayment terms range from one to sixty months.  Certain loans acquired through plan mergers have loan terms up to thirty years. The loan interest rate is fixed at time of origination at the prime rate (as quoted in the Wall Street Journal) plus 2% (5.25% at December 31, 2014 and 2013).  Loans existing at December 31, 2014 and 2013 had interest rates ranging from 5.01% to 11.50%, with maturity dates extending through January 2020.  3M and a third-party record keeper administer loans to participants and loan repayments.  Loans are repaid to the 401(k) Accounts and Rollover Accounts and are invested pro rata according to how the borrowers have currently invested their new 401(k) Accounts contributions.  Principal and interest is repaid ratably through payroll deductions.

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3M Savings Plan

Notes to Financial Statements

1.              Description of Plan, continued

Transfers

Due to 3M acquisition or divestiture activity as well as employee status changes, assets may transfer into or out of the Plan.  These transfers, if any, are shown as “Net transfers in/(out)” on the statement of changes in net assets available for benefits.  The fair market value of assets transferred out of the Plan to the 3M Voluntary Investment Plan during the years ended December 31, 2014 and 2013 was $670,211 and $8,963, respectively.

Plan Termination

While 3M has not expressed any intent to discontinue the Plan, it may do so at any time, subject to the provisions of ERISA and the various collective bargaining agreements.  In the event such discontinuance results in the termination of the Plan, all accounts shall be fully vested and nonforfeitable.  The Plan shall continue until all assets have been distributed to the participants.

Plan Expenses

Certain internal administrative costs, plan investment costs and plan accounting, are paid by the Plan.  3M pays all other internal administrative costs of the Plan.  External administrative costs, including trustee fees, recordkeeping fees and customer service fees and investment management expenses, are proportionately charged directly to the Plan’s various investment funds and accounts.

2.              Summary of Significant Accounting Policies

Tax Status

The Plan constitutes a qualified plan under the requirements of Sections 401(a) and 401(k) of the Internal Revenue Code (IRC) and is, therefore, exempt from federal income taxes under the provisions of Section 501 (a).  The Plan obtained its latest determination letter on August 1, 2013, in which the IRS stated that the Plan, as designed, was in compliance with the applicable requirements of the IRC.  The Plan has been amended since receiving the determination letter.  However, the Plan’s Administrator believes that the Plan is currently designed and being operated in compliance with the applicable requirements of the IRC.

Accounting principles generally accepted in the United States of America require Plan management to evaluate tax positions taken by the Plan and recognize a tax liability (or asset) if the Plan has taken an uncertain position that more likely than not would not be sustained upon examination by the IRS. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress. The Plan administrator believes it is no longer subject to income tax examinations for years prior to 2011.

Trustee

State Street Bank & Trust Co. (“Trustee”) is the Plan’s trustee.

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3M Savings Plan

Notes to Financial Statements

2.              Summary of Significant Accounting Policies, continued

Basis of Accounting

The financial statements of the Plan are prepared on the accrual basis of accounting, in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP).

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of net assets available for benefits, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of changes in net assets available for benefits during the reporting period.  Actual results could differ from those estimates.

Recently Issued Accounting Pronouncements

In May 2015, the Financial Accounting Standards Board issued guidance that eliminates the requirement to categorize investments measured using the net asset value (NAV) practical expedient in the fair value hierarchy table. Entities will be required to disclose the fair value of investments measured using the NAV practical expedient so that financial statement users can reconcile amounts reported in the fair value hierarchy table to amounts reported on the balance sheet. The new guidance will be applied retrospectively and is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted. Plan management is currently evaluating the impact that the new guidance will have on the financial statements.

Risks and Uncertainties

The Plan provides for various investment options in various combinations of investment securities.  Investment securities are exposed to various risks, such as interest rate, market and credit risks.  Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities could occur in the near term and that such changes could materially affect participants’ account balances and the amounts reported in the statement of assets available for benefits.

The Master Trust invests in securities with contractual cash flows, such as asset backed securities, collateralized mortgage obligations and commercial mortgage backed securities.  The value, liquidity and related income of these securities are sensitive to changes in economic conditions, including real estate value, delinquencies or defaults, or both, and may be adversely affected by shifts in the market’s perception of the issuers and changes in interest rates.

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3M Savings Plan

Notes to Financial Statements

2.              Summary of Significant Accounting Policies, continued

Valuation of Assets and Income Recognition

Investments are reported at fair value.  Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.  See Note 5 for a discussion of fair value measurements.

Purchases and sales of securities are recorded on a trade-date basis.  Interest income is recorded on the accrual basis.  Master Trust investment income (loss) includes the net appreciation (depreciation) in the fair value of its investments, which consists of the realized gains or losses and the unrealized appreciation (depreciation) on those investments, along with Master Trust interest and dividend income.

Notes Receivable from Participants

Notes receivable from participants are measured at their unpaid principal balance plus any accrued but unpaid interest. In accordance with IRS rules, participant loan defaults by participants who are not eligible to receive actual distributions from the Plan, such as participants who are active employees, are treated as “deemed” distributions under the Plan. In these circumstances although the outstanding loan balance is reported as taxable income to the participants, the loan balance remains on the participants’ Plan accounts until the participants are eligible to receive a distribution from the Plan. Defaulted participant loans of participants who are eligible to receive distributions from the Plan are reclassified as distributions and offset from their Plan account balances.

Concentration of Market Risk

As of December 31, 2014 and 2013, approximately 27% of the Plan’s assets available for benefits were invested (as part of the Master Trust) in the common stock of 3M Company.  The value of the 3M Company common stock is dependent on the performance of 3M Company and the market’s evaluation of such performance.  It is at least reasonably possible that changes in the fair value of 3M Company common stock in the near term could materially affect the amounts reported in the statements of net assets available for benefits and the statement of changes in net assets available for benefits.

Payment of Benefits

Benefits are recorded when paid.

Subsequent Events

The Plan has evaluated subsequent events through June 29, 2015, the date the financial statements were available to be issued, and other than noted below there were no items requiring adjustment of the financial statements or additional disclosures. Effective January 1, 2015, based on union negotiations, no additional employer contributions will be made in 3M Stock to the 3M Stock Fund.

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3M Savings Plan

Notes to Financial Statements

3.              Non-participant Directed Investments

As described in Note 1, certain investments are non-participant directed.  Information about the assets and the significant components of the changes of assets relating to the non-participant directed investments is as follows:

*Denotes investment exceeding 5% of Plan net assets available for benefits at December 31, 2014 and 2013.

4.              Fair Value Measurements

ASC 820, Fair Value Measurements and Disclosures, establishes a framework for measuring fair value.  That framework provides a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value.  The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (level 1 measurements) and the lowest priority to unobservable inputs (level 3 measurements).  The three levels of the fair value hierarchy under FASB ASC 820 are described as follows:

·                  Level 1:  Inputs to the valuation methodology are unadjusted quoted prices for identical assets or   liabilities in active markets.

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3M Savings Plan

Notes to Financial Statements

4.              Fair Value Measurements, continued

·                  Level 2:  Inputs to the valuation methodology include

·            Quoted prices for similar assets or liabilities in active markets;

·            Quoted prices for identical or similar assets or liabilities in inactive markets;

·            Inputs other than quoted prices that are observable for the asset or liability;

·            Inputs that are derived principally from or corroborated by observable market data by correlation or other means.

If the asset or liability has a specified (contractual) term, the level 2 input must be observable for substantially the full term of the asset or liability.

·                  Level 3:  Inputs to the valuation methodology are unobservable and significant to the fair value measurement

The asset or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.  Valuation techniques used need to maximize the use of observable inputs and minimize the use of unobservable inputs.

The following is a description of the valuation methodologies used for assets held by the Plan through the Master Trust measured at fair value.  There have been no changes in the methodologies used at December 31, 2014 and 2013.

Short term investment fund are valued at amortized cost which approximates fair value due to the short-term maturity of these investments.

3M common stock is valued at the closing price reported on the active markets on which 3M stock is traded.

Mutual funds are valued at the net asset value (NAV) of shares held by the Plan at year end based on the closing price reported on the active market on which the individual mutual funds are traded.

Common collective trusts and Commingled funds are valued at the NAV as a practical expedient for fair value.  The NAV is based on the fair value of the underlying assets which are traded in an active market, minus its liabilities then divided by the number of units outstanding.

Cash equivalents consist of money market accounts and certificates of deposit.  They are valued on the daily closing price as reported by the fund.  The money market fund is a collective fund and is a Level 2.

Common stocks and exchange traded funds are valued using quoted prices listed on nationally recognized securities exchanges.

U.S. government obligations are bonds, notes or municipals valued at either the closing price reported in the active market in which the individual security is traded or valued based on yields currently available on comparable securities of issuers with similar credit ratings.

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3M Savings Plan

Notes to Financial Statements

4.              Fair Value Measurements, continued

Corporate obligations are bonds and notes that are valued at either the yields currently available on comparable securities of issuers with similar credit ratings or valued under a discounted cash flows approach that maximizes observable inputs, such as current yields of similar instruments, but includes adjustments for certain risks that may not be observable such as credit and liquidity risks.

Other investments consist of swaps, forwards, option contracts, municipals and international government bonds.  Options that are valued using the last price are valued as a Level 1.  The Level 2 swaps, forwards and options are valued using models calibrated to initial trade price.  Subsequent valuations are based on observable inputs to the valuation model (e.g. interest rates and credit spreads).  Model inputs are only changed when corroborated by market data. The municipal and international government bonds are valued at either the closing price reported in the active market in which the individual security is traded or valued based on yields currently available on comparable securities of issuers with similar credit rates.  Changes in unobservable yields and other inputs could materially change the fair value.

Synthetic guaranteed investment contracts are valued at fair value within Level 2 of the fair value hierarchy, with an adjustment for contract value on the Statement of Net Assets Available for Benefits.  Contract value represents the face amount of the contract plus interest at the contract rate. Contract value is the relevant measurement attribute for that portion of the net assets available for benefits of a defined-contribution plan attributable to fully benefit-responsive investment contracts because contract value is the amount participants would receive if they were to initiate permitted transactions under the terms of the Plan and the investment contract. There are no reserves against contract value for credit risk of the contract issuers or otherwise. The Statement of Changes in Net Assets Available for Benefits is prepared on a contract value basis for the fully benefit-responsive investment contracts. Fair value for synthetic guaranteed investment contracts is estimated based on the quoted market prices of the underlying fixed income securities. Wrap contracts are purchased to protect against the loss of value on the underlying fixed income securities. The wrap contracts are valued on the basis of the present value of the estimated three year wrap contract fee. The adjustment to contract value represents the remaining difference between the combined fair value of underlying fixed income securities and the wrap contracts, versus the wrap contract value.

The following tables sets forth by level, within the fair value hierarchy, the Plan’s assets at fair value as of December 31, 2014 and 2013.  The following table does not include the Plan’s interest in the Master Trust because that information is presented in a separate table (see Note 5).

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3M Savings Plan

Notes to Financial Statements

4.              Fair Value Measurements, continued

5.              Interest in Master Trust

In order to provide equivalent investment returns to both union employees covered by the Plan and union-free employees covered by a separate 3M-sponsored plan, the Plan’s investments and a portion of the investments of the separate 3M-sponsored plan for union-free employees are held in a single Master Trust.  The investments of the 3M Voluntary Investment Plan and Savings Plan Trust (Master Trust) include participant-directed funds of both the Plan and the 3M Voluntary Investment Plan and Employee Stock Ownership Plan and the non-participant directed 3M-provided CCA assets of the Plan.  The Master Trust investments are in ten different LifePath® Funds, the Stable Value Fund, the Intermediate Bond Fund, Vanguard Money Market Fund, the Long-Term Bond Index Fund, the Balanced Fund, the PIMCO Diversified Real Asset Fund, the S&P 500 Stock Index Fund, the Value Stock Index Fund, the Growth Stock Index Fund, the Growth Stock Fund, the Small Cap Stock Index Fund, the International Stock Index Fund, the International Stock Fund, the 3M Company Stock Fund, and in various mutual funds, individual stocks, bonds, exchange traded funds, CDs, and money market funds through the Schwab PCRA account.  Effective June 30, 2014, the Stable Value Fund was discontinued and replaced with the Intermediate Bond Fund and the Vanguard Money Market Fund.

Each plan has an interest in specific assets in the Master Trust, based on participant investment elections.  The assets of the Master Trust are held by a third-party trustee.  Investment income and administrative expenses relating to the Master Trust are allocated to the individual plans based upon each plan’s relative interest in the assets held in the Master Trust at the close of each day.

The Stable Value Fund, which was discontinued effective June 30, 2014, invests in fully benefit-responsive Synthetic Guaranteed Investment Contracts (GICs) which are stated at estimated fair value and then adjusted to contract value.  Contract value represents contributions to the fund, plus earnings, less participant withdrawals and administrative expenses.  Synthetic GICs consist of a portfolio of securities owned by the fund and a benefit-responsive, book value wrap contract purchased for the portfolio.  The wrap contract amortizes gains and losses of the underlying securities over the portfolio duration, and assures that book value, benefit responsive payments will be made for participant directed withdrawals.  The crediting rate on a synthetic GIC resets every quarter based on the book value of the contract, the market yield of the underlying assets, the market value of the underlying assets and the average duration of the underlying assets.  The crediting rate aims at converging the book value of the contract and the market value of the underlying portfolio over the duration of the contract and the market value of the underlying portfolio over the duration of the contract and therefore will be affected by movements in interest rates and/or changes in the market value of the underlying portfolio.  The crediting rate will not be set below 0%.

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3M Savings Plan

Notes to Financial Statements

5.              Interest in Master Trust, continued

Certain plan-initiated events, such as plan termination, bankruptcy and mergers, may limit the ability of the Plan to transact at contract value.  In general, issuers may terminate the contracts and settle at other than contract value if the qualification status of the Plan changes, breach of material obligations under the contract and misrepresentation by the contract holder, or failure of the underlying portfolio to conform to the pre-established investment guidelines.  The Plan Sponsor does not believe that any events that may limit the ability of the Plan to transact at contract value are probable.

The average crediting interest rate for the synthetic GICs and the average yield for the underlying market portfolios was approximately 1.83% and 2.47% at and for the year ended December 31, 2013.

A summary of the net assets included in the Master Trust at December 31, 2014 and 2013 is as follows:

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3M Savings Plan

Notes to Financial Statements

5.              Interest in Master Trust, continued

The following table summarizes the investments in the Master Trust at December 31, 2014 and 2013:

Other than through the investment of participant and Company contributions, 3M does not buy or sell any of its own stock as a direct investment for the Plan.  However, due to external investment management of the funds, the Plan may indirectly buy, sell or hold 3M common stock.  The aggregate amount of the shares would not be considered material relative to the aggregate fund percentages.

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3M Savings Plan

Notes to Financial Statements

5.              Interest in Master Trust, continued

The Plan’s interest in the Master Trust’s investment income for the years ended December 31 (including investments purchased or sold, as well as those held during the year) was as follows:

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3M Savings Plan

Notes to Financial Statements

5.              Interest in Master Trust, continued

The following tables sets forth by level, within the fair value hierarchy, the Master Trust’s assets at fair value as of December 31, 2014 and 2013:

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3M Savings Plan

Notes to Financial Statements

5.              Interest in Master Trust, continued

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3M Savings Plan

Notes to Financial Statements

5.              Interest in Master Trust, continued