Edgar Filing: WESCO INTERNATIONAL INC

WCC - 2011 11-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 11-K

(Mark One)


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

for the fiscal year ended December 29, 2011


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 1-14989

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

WESCO DISTRIBUTION, INC. RETIREMENT SAVINGS PLAN

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

WESCO INTERNATIONAL, Inc.

225 West Station Square Drive

Suite 700

Pittsburgh, Pennsylvania 15219-1122

WESCO Distribution, Inc.

Retirement Savings Plan

Index



	Page(s)
Report of Independent Registered Public Accounting Firm	1

Financial Statements

Statements of Net Assets Available for Benefits as of December 29, 2011 and 2010	2

Statements of Changes in Net Assets Available for Benefits for the fiscal years ended December 29, 2011 and 2010	3

Notes to Financial Statements	4

Supplementary Schedule

Schedule H, line 4(i) - Schedule of Assets (Held at End of Year) as of December 29, 2011	14

Exhibit 23.1 Consent of Independent Registered Public Accounting Firm	36
EX-23.1

Report of Independent Registered Public Accounting Firm

To the Participants and Administrator of the

WESCO Distribution, Inc. Retirement Savings Plan

Pittsburgh, Pennsylvania

We have audited the accompanying statements of net assets available for benefits of the WESCO Distribution, Inc. Retirement Savings Plan (the Plan) as of December 29, 2011 and 2010, and the related statements of changes in net assets available for benefits for the years then ended. 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 audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States of America). 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. 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 audits provide 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 the Plan as of December 29, 2011 and 2010, and the changes in net assets available for benefits for the years then ended, in conformity with accounting principles generally accepted in the United States of America.

Our audits were performed for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplementary schedule of assets (held at end of year) is presented for the purpose of additional analysis and is not a required part of the basic financial statements but is supplementary information required by the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. This supplementary schedule is the responsibility of the Plan's management. The supplementary schedule has been subjected to the auditing procedures applied in the audits of the basic financial statements and, in our opinion, the information is fairly stated in all material respects in relation to the basic financial statements taken as a whole.

/s/ Alpern Rosenthal

Pittsburgh, Pennsylvania

June 26, 2012

WESCO Distribution, Inc.

Retirement Savings Plan

Statements of Net Assets Available for Benefits

December 29, 2011 and 2010



	2011			2010
Investments at fair value (Notes 2, 4, and 7)
Shares of registered investment companies	$	212,889,446		$	206,330,334
Common collective trusts	24,425,750			22,094,976
Stock funds and self-directed accounts	24,187,238			23,263,414
Stable Value Fund	131,188,232			112,092,798
RAFI Enhanced Large Company Fund	22,638,897			23,152,545
	415,329,563			386,934,067
Receivables
Employer discretionary contribution	15,035,869			13,335,799
Accrued interest	—			21,714
Promissory notes from participants (Note 5)	11,742,957			11,111,960
Net assets available for benefits at fair value	442,108,389			411,403,540

Adjustment from fair value to contract value for interest in
the Stable Value Fund relating to fully benefit-responsive
contracts (Note 7)	(9,920,573		)	(5,836,194		)
Net assets available for benefits	$	432,187,816		$	405,567,346

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

WESCO Distribution, Inc.

Retirement Savings Plan

Statements of Changes in Net Assets Available for Benefits

Fiscal Years Ended December 29, 2011 and 2010



	2011		2010
Additions
Employee contributions	$	24,525,941	$	21,050,278
Employee rollovers	1,567,368		823,825
Employer contributions (including discretionary contributions)	23,514,952		19,843,174
Net appreciation from shares of registered investment companies	—		24,621,547
Net appreciation from common collective trusts	—		2,311,901
Net appreciation from stock funds and self-directed accounts	—		8,188,226
Net appreciation from the Stable Value Fund	4,832,770		4,850,771
Net appreciation from the RAFI Enhanced Large Company Fund	329,422		3,405,912
Interest and dividend income	4,620,459		4,550,634
Total additions	59,390,912		89,646,268

Deductions
Net depreciation from shares of registered investment companies	8,187,327		—
Net depreciation from common collective trusts	833,615		—
Net depreciation from stock funds and self-directed accounts	67,877		—
Distributions to withdrawing participants	35,753,739		32,381,538
Administrative expenses	828,453		740,219
Total deductions	45,671,011		33,121,757
Net increase	13,719,901		56,524,511
Transfer in from TVC Communications, L.L.C. Employees' 401(k) Plan (Note 9)	12,900,569		—
Net assets available for benefits
Beginning of year	405,567,346		349,042,835
End of year	$	432,187,816	$	405,567,346

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

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010


1.	Major Features of the Plan

Background

WESCO Distribution, Inc. Retirement Savings Plan (the “Plan”) was established as of February 28, 1994 (date of inception). At the date of inception, certain employees of the predecessor company became employees of WESCO Distribution, Inc. (the “Company”) and participants in the Plan. At the date of inception, all funds held by the prior plans of the predecessor company related to the employees of the Company were transferred to the Plan.

The Plan is a participant-directed defined contribution plan covering certain employees of the Company and former employees with a fund balance of at least $5,000 who elected to maintain their funds in the Plan. Former employees cannot make contributions to the Plan.

Participation for eligible employees requires an employee to be scheduled to work at least 1,000 hours per year and requires an employee to be paid through the Plan sponsor's payroll system.

Contributions

The Plan is subject to the Employee Retirement Income Security Act of 1974, as amended (“ERISA”). Participants may elect to make tax deferred contributions ranging from 1% up to the lesser of 50% of their eligible compensation or $16,500. The $16,500 limit may be adjusted in future years by the Internal Revenue Service (“IRS”). The sum of the tax deferred contributions and the after-tax contributions cannot exceed 50% of the participant's eligible compensation. Subject to limitation, the Company will make matching contributions in an amount equal to 50% of a participant's total monthly contributions up to a maximum of 3% of their compensation. Also, the Company may, at the Board of Directors' discretion, make a discretionary contribution to the Plan provided certain predetermined profit levels are attained.

Effective January 1, 2010, the Company reinstated employer matching and discretionary contributions that had been suspended since August 1, 2009. Discretionary contributions of $15,035,869 and $13,335,799 were made for the Plan's fiscal years ended December 29, 2011 and 2010, respectively.

The Plan includes a negative enrollment policy. Under this policy, if an individual does not submit an automatic enrollment waiver or elect a deferral rate, the employee will be automatically enrolled in the Plan at a 3% deferral rate. The deferral rate is increased by 1% each September 1 until the deferral rate equals 6%.

Participants who have attained age 50 before the close of the plan year are eligible to make catch-up contributions in addition to pre-tax contributions. A catch-up contribution is a pre-tax contribution that exceeds the annual deferral limit. A participant's total catch-up contribution cannot exceed $5,500 in 2011 and 2010. The catch up contribution limits are determined by the IRS and then indexed for inflation. In addition to cash, in-kind contributions are permitted which may consist of stocks, bonds, property or other securities.

Vesting

Participants are fully vested in the value of their contributions and related investment income at all times and vest in their allocated share of employer matching and discretionary contributions according to the following table:



Less than two years of service	0	%
Two years of service	20	%
Three years of service	40	%
Four years of service	66	%
Five or more years of service	100	%

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010

In conjunction with a leveraged recapitalization of the Company, all active employees as of June 5, 1998 became fully vested.

Forfeitures

Employer contributions forfeited by participants not vested at their termination date are used to reinstate previously forfeited account balances of former participants who have returned to the Company, reduce employer contributions in accordance with the Plan's provisions or pay Plan expenses. Total forfeitures that reduced employer contributions in both 2011 and 2010 were approximately $741,000 and $1,389,000, respectively. As of December 29, 2011, a balance of approximately $84,000 was available to reduce employer contributions in 2012.

Participant Accounts

An account is maintained for each participant, which is credited with the participant's and the employer's matching contributions and an allocation of employer's discretionary contributions, plan earnings and administrative expenses. Allocations are based on participant contributions or account balances, as defined by the Plan. The benefit to which a participant is entitled is the benefit that can be provided from the participant's vested account balance.


2.	Summary of Significant Accounting Policies

Accounting Principles

The financial statements of the Plan have been prepared in accordance with accounting principles generally accepted in the United States of America. The following are the significant accounting policies followed by the Plan:

Basis of Accounting

The accounting records of the Plan are maintained on the accrual basis of accounting.

Recent Accounting Pronouncements

In May 2011, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2011-04, Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs. This ASU clarifies existing fair value measurement and disclosure requirements, amends certain fair value measurement principles and requires additional disclosures regarding the valuation processes used by the Plan in Level 3 measurements. The Plan does not expect the provisions of this ASU, which are effective for the Plan year beginning December 30, 2011, to have a material impact on the Plan’s financial statements.

In January 2010, the FASB issued Accounting Standards Update 2010-06, Improving Disclosures about Fair Value Measurements (ASU 2010-06). ASU 2010-06 amended Accounting Standards Codification 820, Fair Value Measurements and Disclosures (ASC 820), to clarify certain existing fair value disclosures and to require a number of additional disclosures. The guidance in ASU 2010-06 clarified that disclosures should be presented separately for each “class” of assets and liabilities measured at fair value and provided guidance on how to determine the appropriate classes of assets and liabilities to be presented. ASU 2010-06 also clarified the requirement for entities to disclose information about both the valuation techniques and inputs used in estimating Level 2 and Level 3 fair value measurements. In addition, ASU 2010-06 introduced new requirements to disclose the amounts (on a gross basis) and reasons for any significant transfers between Levels 1, 2, and 3 of the fair value hierarchy and to present information regarding the purchases, sales, issuances, and settlements of Level 3 assets and liabilities on a gross basis. ASU 2010-06 was effective for reporting periods beginning after December 15, 2009. The adoption of this portion of ASU 2010-06 did not have a material impact on the Plan’s assets available for benefits or its changes in net assets available for benefits. For the reconciliation of Level 3 fair value measurements, ASU 2010-06 is effective reporting periods beginning after December 15, 2010. The adoption of this portion of ASU 2010-06 did not have a material impact on the Plan’s assets available for benefits or changes therein.

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010

Other pronouncements issued by the FASB or other authoritative accounting standard groups with future effective dates are either not applicable or not expected to be significant to the Plan.

Investment Valuation and Income Recognition

The Plan has adopted a framework for measuring fair value under current accounting pronouncements that requires fair value measurements and enhanced disclosures about fair value measurements. This framework defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction. Disclosures include a fair value hierarchy which requires an entity to maximize the use of observable inputs when measuring fair value.

The three levels of inputs that may be used to measure fair value are as follows:


•	Level 1 - Observable inputs such as quoted prices in active markets for identical investments that the Plan has the ability to access.


•	Level 2 - Inputs include:


1.	Quoted prices for similar assets or liabilities in active markets;


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


3.	Inputs, other than quoted prices in active markets, that are observable either directly or indirectly;


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


•	Level 3 - Unobservable inputs in which there is little or no market activity for the asset or liability, which require the reporting entity to develop its own estimates and assumptions relating to the pricing of the asset or liability, including assumptions regarding risk.

The asset's 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.

Following is a description of the valuation methodologies used for assets measured at fair value. There have been no changes in the methodologies used as of December 29, 2011 and 2010.


•	Common stocks, corporate bonds and U.S. government securities are valued at the closing price reported on the active market on which the individual securities are traded.


•	Registered investment companies are valued at the net asset value of shares held by the Plan as of December 29.

•

Common collective trusts are valued at fair value by determining the price of the underlying investments. Equities listed on an exchange are valued at the latest quoted sales price of the exchange on which the security is primarily traded. Securities that are not traded on the valuation date or securities that are not listed on an exchange are valued at the latest bid price provided by the trust's pricing service.


•	The Stable Value Fund (Note 7) is valued based on the underlying securities which include corporate bonds, commercial mortgage-backed securities and government securities.


•	The RAFI Enhanced Large Company Fund is valued based on the underlying securities which include common stocks.

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010

The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Plan believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement as of the reporting date.

Investment contracts held by a defined-contribution plan are required to be reported at fair value. However, 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. As required by current accounting pronouncements, the statement of net assets available for benefits presents the fair value of the investment contracts as well as the adjustment of the fully benefit-responsive investment contracts from fair value to contract value. The statement of changes in net assets available for benefits is prepared on a contract value basis.

Purchases and sales of securities are recorded on a trade date basis. Dividends are recorded on the ex-dividend date. Interest income is recorded on an accrual basis.

Net Appreciation (Depreciation) in Value of Investments

The Plan presents in the statement of changes in net assets available for benefits the net appreciation (depreciation) in the fair value of its investments, consisting of realized gains (losses) and unrealized gains (losses) in the registered investment companies, common collective trusts, Stable Value Fund, RAFI Enhanced Large Company Fund, WESCO International stock and other common stocks.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make significant estimates and assumptions. These estimates may affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of additions and deductions during the reporting period. Actual results could differ from those estimates.

Risks and Uncertainties

The Plan provides for various investment options in any combination of stocks, bonds, fixed income securities and other investment securities. Investment securities are exposed to various risks, such as interest rate, market and credit risk. Due to the level of risk associated with certain investment securities and the level of uncertainty related to changes in the value of investment securities, it is at least reasonably possible that changes in the near-term could materially affect (i) participants' account balances, and (ii) the amounts reported in the (a) statements of net assets available for benefits and the (b) statements of changes in net assets available for benefits.

Other

All administrative expenses were paid by the Plan during 2011 and 2010.

Payment of Benefits

Benefits are recorded when paid.


3.	Tax Status

The IRS has determined and informed the Company by a letter dated October 15, 2003, that the Plan is designed in accordance with Section 401(a) of the Internal Revenue Code (“IRC”) and, therefore, is exempt from federal taxes under provisions of Section 501(a). Accordingly, no provision for income taxes has been included in the Plan's financial statements. The Plan has been amended since receiving its determination letter. However, the Plan administrator and the Plan's tax counsel

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010

believe the Plan is designed and is currently 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 a taxing authority. 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 2009.


4.	Investments

The following tables sets forth the fair value of the Plan's assets by level, as described in Note 2, as of December 29, 2011 and 2010:



	December 29, 2011

		Level 1		Level 2		Level 3		Total
Shares of registered investment companies:
Small growth		$	3,963,931	$	—	$	—	$	3,963,931
Small value		2,278,256		—		—		2,278,256
Large growth		34,794,349		—		—		34,794,349
Large value		14,309,876		—		—		14,309,876
Moderate allocation		52,424,484		—		—		52,424,484
Mid-cap value		19,028,710		—		—		19,028,710
Mid-cap growth		38,768,312		—		—		38,768,312
Foreign large blend		22,296,936		—		—		22,296,936
Intermediate-term bond		23,230,499		—		—		23,230,499
World bond		1,794,093		—		—		1,794,093
Total shares of registered investment companies		212,889,446		—		—		212,889,446

Common collective trusts:								—
Conservative allocation		—		4,805,624		—		4,805,624
Moderate allocation		—		11,400,358		—		11,400,358
Large blend		—		8,219,768		—		8,219,768
Total common collective trusts		—		24,425,750		—		24,425,750

Stock funds and self-directed accounts:
WESCO International Pooled Stock Fund		17,276,264		—		—		17,276,264

Self-directed accounts:
Cash and cash equivalents		1,026,658		—		—		1,026,658
Preferred stock		2		—		—		2
Common stock:
Transportation		177,683		—		—		177,683
Food, beverages & tobacco		261,066		—		—		261,066
Building materials		46,302		—		—		46,302

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010



	December 29, 2011					(continued)

		Level 1		Level 2		Level 3		Total
Chemicals		47,703		—		—		47,703
Communications & media		154,569		—		—		154,569
Electronics & equipment		311,686		—		—		311,686
Energy		240,681		—		—		240,681
Financial		443,565		—		—		443,565
Health care services		497,795		—		—		497,795
Industrial		110,968		—		—		110,968
Leisure & entertainment		189,277		—		—		189,277
Metals		186,484		—		—		186,484
Miscellaneous		176,972		—		—		176,972
Multi-industry		108,530		—		—		108,530
Retail		95,659		—		—		95,659
Utilities		426,136		—		—		426,136
Mutual funds:
Fixed		461,821		—		—		461,821
Balanced		415,748		—		—		415,748
Equity		1,188,070		—		—		1,188,070
International		343,599		—		—		343,599
Total stock funds and self-directed accounts		24,187,238		—		—		24,187,238

Stable Value Fund		—		131,188,232		—		131,188,232

RAFI Enhanced Large Company Fund
Cash and cash equivalents		—		180,803		—		180,803
Common stock:
Consumer discretionary		—		2,877,204		—		2,877,204
Consumer staples		—		2,238,559		—		2,238,559
Distribution services		—		574,374		—		574,374
Energy		—		2,761,785		—		2,761,785
Financials		—		3,352,508		—		3,352,508
Health care services		—		2,400,930		—		2,400,930
Industrials		—		2,115,962		—		2,115,962
Information technology		—		2,659,976		—		2,659,976
Materials		—		784,284		—		784,284
Telecommunication services		—		1,149,604		—		1,149,604
Utilities		—		1,542,908		—		1,542,908
Total RAFI Enhanced Large Company Fund		—		22,638,897		—		22,638,897

		$	237,076,684	$	178,252,879	$	—	$	415,329,563

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010



	December 29, 2010

		Level 1		Level 2		Level 3		Total
Shares of registered investment companies:
Small growth		$	2,324,761	$	—	$	—	$	2,324,761
Small value		1,788,814		—		—		1,788,814
Large growth		35,447,600		—		—		35,447,600
Large value		13,466,588		—		—		13,466,588
Moderate allocation		43,962,362		—		—		43,962,362
Mid-cap value		21,629,071		—		—		21,629,071
Mid-cap growth		42,693,921		—		—		42,693,921
Foreign large blend		24,894,918		—		—		24,894,918
Intermediate-term bond		20,122,299		—		—		20,122,299
Total shares of registered investment companies		206,330,334		—		—		206,330,334

Common collective trusts:
Conservative allocation		—		4,254,078		—		4,254,078
Moderate allocation		—		9,513,259		—		9,513,259
Large blend		—		8,327,639		—		8,327,639
Total common collective trusts		—		22,094,976		—		22,094,976

Stock funds and self-directed accounts:
WESCO International Pooled Stock Fund		16,466,959		—		—		16,466,959

Self-directed accounts:
Cash and cash equivalents		898		—		—		898
Preferred stock		7		—		—		7
Common stock:
Transportation		191,351		—		—		191,351
Food, beverages & tobacco		127,927		—		—		127,927
Building materials		59,007		—		—		59,007
Chemicals		23,031		—		—		23,031
Communications & media		136,320		—		—		136,320
Electronics & equipment		797,617		—		—		797,617
Energy		134,341		—		—		134,341
Financial		480,782		—		—		480,782
Health care services		219,290		—		—		219,290
Industrial		80,421		—		—		80,421
Leisure & entertainment		197,648		—		—		197,648
Metals		163,041		—		—		163,041
Miscellaneous		264,363		—		—		264,363
Multi-iIndustry		149,379		—		—		149,379
Retail		42,607		—		—		42,607
Utilities		233,921		—		—		233,921
Mutual funds:
Short term		958,205		—		—		958,205
Fixed		307,421		—		—		307,421
Balanced		314,066		—		—		314,066
Equity		1,509,772		—		—		1,509,772
International		405,040		—		—		405,040
Total stock funds and self-directed accounts		23,263,414		—		—		23,263,414

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010



	December 29, 2010					(continued)

		Level 1		Level 2		Level 3		Total
Stable Value Fund		—		112,092,798		—		112,092,798

RAFI Enhanced Large Company Fund:
Cash and cash equivalents		—		291,309				291,309
Common stock:
Consumer discretionary		—		2,978,260		—		2,978,260
Consumer staples		—		2,138,452		—		2,138,452
Energy		—		2,833,331		—		2,833,331
Financials		—		4,617,255		—		4,617,255
Health care services		—		1,933,118		—		1,933,118
Industrials		—		2,879,403		—		2,879,403
Information technology		—		2,429,792		—		2,429,792
Materials		—		839,713		—		839,713
Telecommunication services		—		854,860		—		854,860
Utilities		—		1,357,052		—		1,357,052
Total RAFI Enhanced Large Company Fund		—		23,152,545		—		23,152,545

		$	229,593,748	$	157,340,319	$	—	$	386,934,067

Investments (at fair value) representing 5% or more of the net assets available for benefits as of December 29, 2011 and 2010 were as follows:



	2011		2010
AMCAP Fund (Class R-5)	$	34,794,349	$	35,447,600
American Balanced Fund (Class A)	52,424,484		43,962,362
Columbia Acorn Fund (Class A)	38,768,312		42,693,921
Columbia Mid Cap Value Fund (Class A)	—		21,629,071
Loomis Sayles Investment Grade Bond Fund (Class Y)	23,230,499		—
Stable Value Fund	131,188,232		112,092,798
Thornburg International Value Fund	22,296,936		24,894,918


5.	Promissory Notes From Participants

Participants are permitted to borrow against a portion of their vested account balance, pursuant to nondiscriminatory rules established by the Administrative Committee, up to a maximum of $50,000 or 50% of their vested account balance. Each loan is to be repaid over a period not to exceed five years.

The interest rate applied to participant loans is established each month by the Administrative Committee at 1% above the PNC Bank prime interest rate. The interest rate on loans outstanding ranged between 4.25% and 10.5% for the fiscal years ended December 29, 2011 and 2010. Principal and interest payments are generally made through monthly payroll deductions and are credited to the participant's individual account. Loans of approximately $6,257,000 and $6,542,000 were made from the Plan and loan principal repayments of approximately $5,525,000 and $4,552,000 were received by the Plan for the fiscal years ended December 29, 2011 and 2010, respectively. Interest on the promissory notes of approximately $500,000 and $522,000 was earned by the Plan for the fiscal years ended December 29, 2011 and 2010, respectively.

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010


6.	Plan Termination

Although the Company has not expressed any intent to do so, it has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions of ERISA. In the event the Plan terminates, participants will become 100% vested in their accounts, and all vested assets shall be distributed to the participants in accordance with the terms of the Plan, or in such other manner, not inconsistent with the requirements of any applicable law or regulation, as the Company may in its sole discretion determine.


7.	The Stable Value Fund

During 2007, the Plan began investing in a fully benefit-responsive synthetic guaranteed interest contract (“GIC”) with an insurance company as part of offering the Stable Value Fund (the “Fund”) investment option to participants. Contributions to this Fund are used to purchase units of a collective trust vehicle which is invested in high-quality U.S. bonds, including U.S. government treasuries, corporate debt securities, and other high-credit-quality asset-backed securities. The GIC issuer is contractually obligated to repay the principal and a specified interest rate that is guaranteed to the Plan. There are no reserves against contract value for credit risk of the contract issuer or otherwise.

The Fund has entered into a wrap contract with an insurance company under which the insurance company provides a guarantee with respect to the availability of funds to make distributions from this investment option. This insurance contract is carried at contract value in the participants' accounts.

Participant accounts in the Fund are credited with interest at a fixed rate that is reset quarterly based on an agreed-upon formula as defined in the contract. The primary variables which could impact the future interest rates that are credited to the participant's accounts (“credited rates”) include (i) the amount and timing of participant contributions, (ii) transfers and withdrawals into/out of the contract, (iii) the current yield of the assets underlying the contract, (iv) the duration of the assets underlying the contract, and (v) the existing difference between fair value of the securities and the contract value of the assets within the insurance contract. The credited rate of security-backed contracts will track current market yields on a trailing basis. The rate reset feature allows the contract value to converge with the fair value of the underlying portfolio over time, assuming the portfolio continues to earn the current yield for a period of time equal to the current portfolio duration.

To the extent that the underlying portfolio has unrealized and/or realized losses, a positive adjustment is made when reconciling from fair value to contract value under contract value accounting. As a result, the future credited rate may be lower over time than the current market rates. Similarly, if the underlying portfolio generates unrealized and/or realized gains, a negative adjustment is made when reconciling from fair value to contract value, and in the future, the credited rate may be higher than the current market rates. The insurance contract cannot credit an interest rate that is less than zero percent.

Certain events limit the ability of the Plan to transact at contract value with the insurance company. Such events are limited to premature termination of the contract by the Plan or plan termination. The plan sponsor has not expressed any intention to take either of these actions.

As described in Note 2, because the synthetic GIC is fully benefit-responsive, contract value is the relevant measurement attribute for that portion of the net assets available for benefits attributable to the synthetic GICs. Participants may ordinarily direct the withdrawal or transfer of all or a portion of their investment at contract value. The average yields earned by the Fund as of December 29, 2011 and 2010 are as follows:



Average yield for synthetic GICs	2011		2010
Based on actual earnings	1.93	%	2.76	%
Based on interest rate credited to participants	3.84	%	4.43	%

WESCO Distribution, Inc.

Retirement Savings Plan

Notes to Financial Statements

December 29, 2011 and 2010


8.	Related Party Transactions

Participants of the Plan may elect to invest in WESCO International, Inc. common stock within the WESCO Pooled Stock Fund. WESCO International, Inc. owns 100% of the Company. Therefore, these transactions qualify as party-in-interest transactions. Purchases and sales proceeds within the WESCO Pooled Stock Fund for 2011 were $4,554,000 and $4,190,000, respectively, and purchases and sales proceeds for 2010 were $2,605,000 and $2,210,000, respectively.


9.	TVC Communications, L.L.C. Employees’ 401(k) Plan Transfer

On December 16, 2010, the Company acquired TVC Communications, L.L.C and on April 5, 2011, the participant balances of the acquired company were transferred into the Plan. At that time, the TVC Communications, L.L.C. Plan’s net assets available for benefits of approximately $12,901,000 were transferred into the Plan.


10.	Subsequent Event

As a result of the acquisition of the business of RS Electronics on January 3, 2012, approximately 100 participants were added to the Plan. These participants transferred assets of approximately $5,053,000 to the Plan in 2012.



WESCO Distribution, Inc.
Retirement Savings Plan
Schedule of Assets (Held at End of Year)
EIN 25-1723345, Plan Number 001
December 29, 2011				Schedule H, line 4i



(a)	(b)	(c)	(d)
		Description of Investment
	Identity of Issue,	Including Maturity Date,
	Borrower, Lessor or	Rate of Interest, Collateral,	Current
	Similar Party	Par, or Maturity Value	Value

	AMCAP Fund	AMCAP Fund (Class R-5)	$	34,794,349
	American Funds	American Balanced Fund (Class A)	52,424,484
	Baron Funds	Baron Small Cap Fund	3,963,931
	Columbia Mutual Funds	Columbia Acorn Fund (Class A)	38,768,312
	Columbia Mutual Funds	Columbia Mid Cap Value Fund (Class A)	19,028,710
	Diamond Hill Family of Funds	Diamond Hill Small Cap Fund	2,278,256
	Loomis Sayles	Loomis Sayles Invest Grade Bond (Class Y)	23,230,499
	MFS Family of Funds	MFS Value Fund (Class A)	14,309,876
	Franklin Templeton Funds	Templeton Global Bond Fund	1,794,093
	Thornburg International	Thornburg International Value Fund	22,296,936
	Registered Investment Companies Total		212,889,446

	Manning & Napier Promix Funds	Manning & Napier Promix Conservative Trust	4,805,624
	Manning & Napier Promix Funds	Manning & Napier Promix Extended Trust	6,378,632
	Manning & Napier Promix Funds	Manning &Napier Promix Maximum Trust	8,219,768
	Manning & Napier Promix Funds	Manning & Napier Promix Moderate Trust	5,021,726
	Common Collective Trusts Total		24,425,750

*	WESCO International, Inc.	WESCO International Pooled Stock Fund	17,276,264
	3M Company	Common Stock	17,735
	Abbott Labs	Common Stock	13,519
	Acura Pharmaceuticals Inc.	Common Stock	21,257
	Advanced Energy Industries	Common Stock	2,519
	Aeropostale	Common Stock	8,190
	Aflac Inc.	Common Stock	2,164
	AGL Resources	Common Stock	42,700
	Agnico Eagle Mines LTD	Common Stock	8,227
	Agrium Inc.	Common Stock	6,687
	Alaska Communications Systems Group Inc.	Common Stock	1,485
	Alcatel-Lucent Ads	Common Stock	4,709
	Alcoa Inc.	Common Stock	9,014
	Alliance Bernstein	Global High Income Fund	57,000
	Alliance Financial Corp	Common Stock	5,636
	Allos Therapeutics Inc.	Common Stock	695
	Allot Communications LTD	Common Stock	6,152
	Amazon.com Inc.	Common Stock	3,477
	American Beacon Funds	Large Cap Value Fund	6,989
	American Capital Agency Corp	Common Stock	227,399
	American Century Funds	High Yield Fund	15,597
	American Century Strategic Asset Allocations	Moderate Fund	22,006
	Amgen Inc.	Common Stock	6,474
	Amtech Systems Inc.	Common Stock	7,623
	Ancestry.com Inc.	Common Stock	2076
	Annaly Capital Management Inc.	Common Stock	55,074
	AOL Inc.	Common Stock	950
	Apartment Investment and Mortgage Company	Common Stock	8,015
	Apple Inc.	Common Stock	99,255
	Applied Materials Inc.	Common Stock	1,036
	Arcelor Mittal	Common Stock	3,624
	Archer Daniels Midland Company	Common Stock	2,978
	Artisan Funds	International Investor Shrs	5,315
	Astex Pharmaceuticals	Common Stock	880



WESCO Distribution, Inc.
Retirement Savings Plan
Schedule of Assets (Held at End of Year)
EIN 25-1723345, Plan Number 001
December 29, 2011				Schedule H, line 4i



(a)	(b)	(c)	(d)
		Description of Investment
	Identity of Issue,	Including Maturity Date,
	Borrower, Lessor or	Rate of Interest, Collateral,	Current
	Similar Party	Par, or Maturity Value	Value
	AT&T Inc	Common Stock	6,034
	Atlantic Power Corporation	Common Stock	3,535
	Autoliv Inc.	Common Stock	2,649
	Automatic Data Processing Inc.	Common Stock	5,652
	B & G Foods Inc.	Common Stock	105,547
	Baidu.com Inc.	Common Stock	3,442
	Baker Hughes Inc.	Common Stock	9,152
	Bank of America Corp	Common Stock	3,112
	Baxter International Inc.	Common Stock	4,979
	Berkshire Hathaway Inc.	Common Stock	19,225
	Bhp Billiton Ltp-Spon Adr	Common Stock	7,030
	Biotime Inc.	Common Stock	165
	Boeing Co.	Common Stock	14,822
	BP Plc	Common Stock	35,388
	BP Prudhoe Bay Royalty Trust	Common Stock	4,552
	Brookfield Infrastructure Partners LP	Common Stock	8,334
	Buffalo Wild Wings Inc	Common Stock	2,730
	Cardium Therapeutics Inc.	Common Stock	2,633
	Cash	Cash and cash equivalents	1,026,658
	Caterpillar Inc.	Common Stock	54,899
	CBS Corp.	Common Stock	53,636
	Celgene Corp.	Common Stock	20,265
	Cell Therapeutics	Common Stock	560
	Cemex SAB De CV	Common Stock	6,058
	CenturyLink Inc	Common Stock	1,860
	Cheniere Energy Inc	Common Stock	1,742
	Chesapeake Energy Corp.	Common Stock	9,092
	Chevron Corp.	Common Stock	18,270
	Chipotle Mexican Grill Inc	Common Stock	11,927
	Cinemark Holdings Inc.	Common Stock	1,859
	Citigroup Inc.	Common Stock	70,513
	Coach Inc	Common Stock	4,554
	Coca Cola Company	Common Stock	14,032
	Columbia	Value & Restructuring Fund - Class Z	4,482
	Columbia	Global Bond Fund - Class R4	133,639
	Comcast Corp.	Common Stock	4,732
	Compass Minerals International	Common Stock	13,780
	Consolidated Edison Inc	Common Stock	40,684
	Core-Mark Holding Co Inc.	Common Stock	7,896
	Corporate Executive Board	Common Stock	3,878
	Costco Whsl Corp.	Common Stock	24,543
	CrossTex Energy Inc	Common Stock	3,744
	CSR PLC Cambridge	Common Stock	407
	CTS Corp.	Common Stock	940
	Cubist Pharmaceuticals Inc	Common Stock	7,954
	Cummins Inc	Common Stock	17,796
	Deere & Co	Common Stock	7,992
	Delsite Inc	Common Stock	2
	Devon Energy Corporation	Common Stock	9,344
	Dex One Corp	Common Stock	195
	DGT Holdings Corporation	Common Stock	77
	Diageo PLC	Common Stock	21,788
	Direxion	ETF Trust Daily Financial Bear 3X	2,372



WESCO Distribution, Inc.
Retirement Savings Plan
Schedule of Assets (Held at End of Year)
EIN 25-1723345, Plan Number 001
December 29, 2011				Schedule H, line 4i



(a)	(b)	(c)	(d)
		Description of Investment
	Identity of Issue,	Including Maturity Date,
	Borrower, Lessor or	Rate of Interest, Collateral,	Current
	Similar Party	Par, or Maturity Value	Value
	Discovery Laboratories Inc.	Common Stock	334
	Dodge & Cox Funds	Balanced Fund	121,934
	Dodge & Cox Funds	Stock Fund	29,260
	Dodge & Cox Funds	Income Fund	71,420
	Dorchester Minerals LP	Common Stock	2,274
	Dow Chemical	Common Stock	15,083
	Du Pont De Nemours and Company	Common Stock	4,585
	Dualstar Technologies Corp.	Common Stock	1
	Duluth Metals LTD	Common Stock	7,707
	Dynamic Materials Corp.	Common Stock	1,807
	E Trade Financial Corp.	Common Stock	3,985
	Eaton Corp.	Common Stock	65,865
	Ebix Inc	Common Stock	2,266
	EFTS	Swiss Gold Shares	38,298
	EFTS	Physical Silver Shares	27,630
	Enduro Royalty Trust	Common Stock	12,300
	Enerplus Corporation	Common Stock	8,264
	EOG Resources Inc	Common Stock	9,805
	Exelon Corporation	Common Stock	47,207
	Exide Technologies	Common Stock	13,300
	Exxon Mobil Corp.	Common Stock	40,558
	Federated Investors Inc	Common Stock	2,118
	Fibertower Corp.	Common Stock	294
	Fidelity Investments	Select Natural Resources Fund	34,901
	First Eagle	Global Bond Fund Class I	38,779
	First Horizon National Corp	Common Stock	2,623
	First Niagara Financial Group	Common Stock	2,922
	Focus Enhancements Inc	Common Stock	1
	Ford Motor Company	Common Stock	69,046
	Forest Labs Inc	Common Stock	9,084
	Freeport McMoran Copper & Gold Inc.	Common Stock	14,616
	Fuel Tech Inc	Common Stock	3,355
	Gabelli	Asset Fund	51,687
	Gabelli	Utilities Fund	40,881
	General Electric	Common Stock	86,917
	Genon Energy Inc.	Common Stock	4,050
	Genuine Parts Co	Common Stock	3,098
	Glaxosmithkline PLC	Common Stock	2,741
	Globe Specialty Metals Inc.	Common Stock	10,544
	Goldcorp Inc.	Common Stock	4,353
	Google Inc	Common Stock	5,139
	Green Mountain Coffee Inc	Common Stock	7,639
	H J Heinz Company	Common Stock	5,431
	Halliburton Co	Common Stock	10,137
	Hansen National Corp	Common Stock	46,875
	Harbor Funds	Bond Fund - Institutional Class	12,916
	Hasbro Inc	Common Stock	2,563
	Hatteras Financial Corp	Common Stock	13,165
	Hawaiian Electric Ind. Inc.	Common Stock	46,053
	Headwaters Inc.	Common Stock	860
	Heartland Funds	Select Value Fund	17,713
	Hewlett Packard	Common Stock	5,124
	Honeywell International Inc	Common Stock	5,479



WESCO Distribution, Inc.
Retirement Savings Plan
Schedule of Assets (Held at End of Year)
EIN 25-1723345, Plan Number 001
December 29, 2011				Schedule H, line 4i



(a)	(b)	(c)	(d)
		Description of Investment
	Identity of Issue,	Including Maturity Date,
	Borrower, Lessor or	Rate of Interest, Collateral,	Current
	Similar Party	Par, or Maturity Value	Value
	I Shares	U.S Preferred Stock Index Fund	5,322
	I Shares	Silver Trust	50,076
	I Shares	MSCI Australia Index Fund	21,450
	I Shares	DJ Select Dividend Index Fund	5,416
	Icon Funds	Icon Healthcare Fund	49,897
	Icon PLC	Common Stock	6,784
	IGO Inc.	Common Stock	9,840
	Impala Platinum Holdings LTD	Common Stock	2,011
	Integral Technologies Inc	Common Stock	1,425
	Intel Corp.	Common Stock	25,287
	International Business Machines Corp.	Common Stock	6,702
	International Paper Co	Common Stock	1,186
	International Speedway Corp.	Common Stock	7,160
	Interplay Entertainment	Common Stock	61
	Intuitive Surgical Inc	Common Stock	233,015
	Invesco Van Kampen	Advantage Municipal Income Trust II	74,700
	Invio Biomedical Corp.	Common Stock	651
	Ipath	Dow Jones UBS Commodity Index Fund	4,206
	Ivanhoe Energy Inc.	Common Stock	118
	Janus Funds	Global Select Fund Class T	10,145
	Janus Funds	Contrarian Fund T Shares	12,025
	Janus Funds	Enterprise Fund	9,937
	Janus Funds	Triton Fund Class I	26,999
	Janus Funds	Overseas Fund	29,654
	Johnson & Johnson	Common Stock	12,056
	Joy Global Inc	Common Stock	15,100
	JP Morgan	Alerian MLP Index Fund	5,442
	Keryx Biopharmaceuticals	Common Stock	476
	Kinder Morgan Energy Partners LP	Common Stock	21,060
	Kinder Morgan Inc	Common Stock	14,675
	Koko Petroleum Inc.	Common Stock	60
	Kraft Foods Inc	Common Stock	3,881
	Lehman Brothers Holdings Inc	Preferred Stock	2
	LifeTechnologies Corp	Common Stock	3,925
	Limelight Networks Inc	Common Stock	8,880
	Lockheed Martin Corp	Common Stock	6,522
	Loomis Sayles	Global Bond Fund	141,343
	Lowes Companies	Common Stock	12,840
	Lululemon Athletica Inc	Common Stock	1,882
	Managers	Real Estate Securities Fund	9,819
	Managers Intermediate Duration Govt	Fixed Fund	54,190
	Manhattan Pharmaceuticals	Common Stock	2
	Mannkind Corp	Common Stock	585
	Marathon Oil Corp	Common Stock	29
	Marina Biotech Inc.	Common Stock	54
	Marisco	21st Century Mutual Fund	6,937
	Market Vectors	Gold Miners ETF Fund	7,680
	Marsico	Large Growth Fund	27,381
	Marvell Technology Group	Common Stock	2,750
	Masco Corp	Common Stock	32,100
	Mastercard Inc	Common Stock	5,674
	Matrix Advisors	Value Fund	21,385
	Maxwell Technologies Inc	Common Stock	654



WESCO Distribution, Inc.
Retirement Savings Plan
Schedule of Assets (Held at End of Year)
EIN 25-1723345, Plan Number 001
December 29, 2011				Schedule H, line 4i



(a)	(b)	(c)	(d)
		Description of Investment
	Identity of Issue,	Including Maturity Date,
	Borrower, Lessor or	Rate of Interest, Collateral,	Current
	Similar Party	Par, or Maturity Value	Value
	McDonalds Corp.	Common Stock	16,130
	Mercadolibre Inc	Common Stock	80,250
	Merck & Co. Inc	Common Stock	4,528
	Microsoft Corp.	Common Stock	9,259
	Molson Coors Brewing Co	Common Stock	8,746
	Monsanto Company	Common Stock	14,427
	Mosaic Co.	Common Stock	4,978
	Myrexis Inc	Common Stock	804
	Nacel Energy Corp.	Common Stock	45
	Nanosphere Inc	Common Stock	11,201
	National Grid PLC	Common Stock	4,375
	National Oilwell Inc	Common Stock	13,574
	Neomedia Technologies	Common Stock	1
	Nestle SA Sponsored ADR	Common Stock	20,051
	Netflix.com Inc	Common Stock	2,079
	Neuberger Berman	Genesis Trust Fund	11,823
	Neuberger Berman	Real Estate Fund	9,428
	Newcastle Investment Corp.	Common Stock	872
	Nike Inc	Common Stock	3,508
	Nokia Corp.	Common Stock	1,550
	Norfolk Southern Corp.	Common Stock	7,285
	Novartis AG	Common Stock	3,410
	Nucor Corp.	Common Stock	3,325
	Oakmark Funds	Oakmark Equity and Income Fund (I)	24,866
	Oakmark Funds	Global Fund	22,656
	Oakmark Funds	Mutual Fund	15,072
	Oakmark Funds	International Fund (Class I)	10,873
	Oilsands Quest Inc	Common Stock	465
	Palomar Medical Technologies Inc	Common Stock	18,620
	Panera Bread Company	Common Stock	5,381
	Paychex Inc.	Common Stock	7,545
	Pepsico Inc	Common Stock	17,700
	Permanent Portfolio	Mutual Fund	75,341
	Perrigo Company	Common Stock	49,520
	Petroleo Brasileiro ADR	Common Stock	246
	Petroquest Energy Inc.	Common Stock	3,315
	Pfizer Inc.	Common Stock	10,405
	Philip Morris International Inc.	Common Stock	11,865
	PNM Resources Inc.	Common Stock	82,755
	Polymet Mining Corp.	Common Stock	8,242
	Potash Corp of Saskatchewan	Common Stock	26,981
	Powershares	Agricultural Fund	6,329
	Powershares	Oil Fund	27,992
	Priceline Com Inc	Common Stock	2,856
	Procter & Gamble Co	Common Stock	14,657
	Proshares TR	Ultrashort Lehman 20 Year Fund	55,564
	Qualcomm Inc.	Common Stock	2,743
	Questar Market Resources Inc	Common Stock	11,692
	RF Micro-Devices	Common Stock	16,410
	Rio Tinto PLC ADR	Common Stock	24,105
	Royce	Total Return Fund	24,390
	RS Partners	Mutual Fund	4,506
	Samson Oil & Gas LTD	Common Stock	7,008



WESCO Distribution, Inc.
Retirement Savings Plan
Schedule of Assets (Held at End of Year)
EIN 25-1723345, Plan Number 001
December 29, 2011				Schedule H, line 4i



(a)	(b)	(c)	(d)
		Description of Investment
	Identity of Issue,	Including Maturity Date,
	Borrower, Lessor or	Rate of Interest, Collateral,	Current
	Similar Party	Par, or Maturity Value	Value
	Sanofi	Common Stock	1,287
	Seadrill Limited	Common Stock	21,625
	Sound Shore Fund	Mutual Fund	6,039
	Southern Co	Common Stock	4,659
	Southern Copper Corp.	Common Stock	14,970
	SPDR	Dow Jones Industrial Average ETF Trust Fund	60,035
	SPDR	S&P Dividend Fund	11,391
	Sprint Nextel Corp.	Common Stock	3,465
	St Joe Company	Common Stock	11,040
	Starbucks Corp.	Common Stock	4,645
	Statiol ASA Group	Common Stock	42,161
	Storage Computer Corp	Common Stock	1
	Stryker Corp.	Common Stock	5,653
	STW Resources Holding Corp.	Common Stock	500
	Sysco Corp.	Common Stock	12,926
	T. Rowe Price Funds	Balanced Fund	107,763
	T. Rowe Price Funds	Capital Appreciation Fund	137,139
	T. Rowe Price Funds	New Era Fund	110,964
	T. Rowe Price Funds	Growth Stock Fund	47,579
	T. Rowe Price Funds	Spectrum International Fund	15,926
	T. Rowe Price Funds	Dividend Growth Fund	5,419
	T. Rowe Price Funds	Emerging Markets Bond Fund	117,123
	Terra Nitrogen	Common Stock	16,370
	Third Avenue	Real Estate Value Fund	4,940
	Third Avenue	International Value Fund	10,674
	Third Avenue	Value Fund	14,622
	Thompson Plumb	Bond Fund	35,032
	Time Warner Cable Inc.	Common Stock	53,033
	Time Warner Inc.	Common Stock	25,430
	Toqueville	Gold Fund	2,941
	Total SA	Common Stock	12,702
	Transocean Inc.	Common Stock	6,132
	UIL Holdings Corp	Common Stock	35,660
	Unigene Labs Inc.	Common Stock	3,200
	Valeant Pharmaceuticals Intl.	Common Stock	8,236
	Vanguard Funds	Wellesley Income Fund	29,517
	Vanguard Funds	Emerging Markets Exchange Traded Fund	5,137
	Vanguard Funds	Dividend Appreciation Fund	79,663
	Vanguard Funds	Dividend Growth Fund	6,451
	Vanguard Funds	REIT Index Fund	6,681
	Vanguard Funds	Small Cap Index Fund	6,688
	Vanguard Funds	Small Cap Value Index Fund	6,712
	Vanguard Funds	Windsor II Fund	51,753
	Vanguard Funds	Value Index Fund	13,474
	Vanguard Funds	500 Index Investor Fund	13,369
	Vanguard Funds	Total Bond Market Index Fund	7,327
	Vanguard Funds	Global Ex US Real Estate Fund	8,150
	Vanguard Funds	Total International Stock Index Fund	19,865
	Vanguard Funds	International Value Fund	19,208
	Vecima Networks Inc	Common Stock	3
	Velatel Global Communications	Common Stock	194
	Veolia Environment ADR	Common Stock	1,651
	Verizon Communications	Common Stock	2,001



WESCO Distribution, Inc.
Retirement Savings Plan
Schedule of Assets (Held at End of Year)
EIN 25-1723345, Plan Number 001
December 29, 2011				Schedule H, line 4i



(a)	(b)	(c)	(d)
		Description of Investment
	Identity of Issue,	Including Maturity Date,
	Borrower, Lessor or	Rate of Interest, Collateral,	Current
	Similar Party	Par, or Maturity Value	Value
	Viacom Inc.	Common Stock	80,292
	Vioquest Pharmaceuticals Intl.	Common Stock	1
	Vodafone Group PLC	Common Stock	16,921
	Vulcan Materials Co	Common Stock	8,144
	Walgreen Co	Common Stock	6,686
	Walmart Stores Inc	Common Stock	12,118
	Waste Management Inc	Common Stock	3,278
	Wells Fargo & Co	Common Stock	4,442
	Western Digital Corp.	Common Stock	2,332
	White Mountains Insurance Group	Common Stock	4,950
	Windstream Corp	Common Stock	35,550
	Wynn Resorts LTD	Common Stock	5,517
	Xcel Energy Inc	Common Stock	30,315
	Yingli Green Energy Holding Company	Common Stock	1,152
	Ziopharm Oncology Inc	Common Stock	14,355
	Stock Funds and Self-Directed
	Accounts Total		24,187,238

	Institutional Enhanced Index Fixed