LNT 12.31.2012 11-K
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 11-K

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

For the fiscal year ended December 31, 2012

or
¨
TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _____________ to _____________

Commission File Number: 1-9894

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

ALLIANT ENERGY CORPORATION 401(k) SAVINGS PLAN

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

ALLIANT ENERGY CORPORATION
4902 North Biltmore Lane
Madison, Wisconsin 53718




REQUIRED INFORMATION

The following financial statements and schedules of the Alliant Energy Corporation 401(k) Savings Plan, prepared in accordance with the financial reporting requirements of the Employee Retirement Income Security Act of 1974, as amended, are filed herewith.




















































Page 1 of 18 pages
Exhibit Index is on page 17







ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN

FINANCIAL STATEMENTS AS OF DECEMBER 31, 2012 AND 2011

AND FOR THE YEAR ENDED DECEMBER 31, 2012,

SUPPLEMENTAL SCHEDULES AS OF AND FOR THE YEAR ENDED DECEMBER 31, 2012, AND

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM



TABLE OF CONTENTS

Page Number
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
FINANCIAL STATEMENTS
 
Statements of Net Assets Available for Benefits as of December 31, 2012 and 2011
Statement of Changes in Net Assets Available for Benefits for the Year Ended December 31, 2012
NOTES TO FINANCIAL STATEMENTS
 
1. Description of the Plan
2. Summary of Significant Accounting Policies
3. Tax Status
4. Plan Termination Provisions
5. Withdrawals and Distributions
6. Derivative Financial Instruments
7. Investment Information
8. Fair Value Measurements
9. Non-participant Directed Investments
10. Related Party Transactions
11. Reconciliation to Form 5500
SUPPLEMENTAL SCHEDULES
 
Form 5500, Schedule H, Part IV, line 4i - Schedule of Assets (Held at End of Year) as of December 31, 2012
Form 5500, Schedule H, Part IV, line 4i - Schedule of Assets (Acquired and Disposed of Within Year) for the Year Ended December 31, 2012
Form 5500, Schedule H, Part IV, line 4j - Schedule of Reportable Transactions for the Year Ended December 31, 2012
SIGNATURES
EXHIBIT INDEX
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
18


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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Total Compensation Committee and Participants of the Alliant Energy Corporation 401(k) Savings Plan
Madison, Wisconsin

We have audited the accompanying statements of net assets available for benefits of Alliant Energy Corporation 401(k) Savings Plan (the “Plan”) as of December 31, 2012 and 2011, and the related statement of changes in net assets available for benefits for the year ended December 31, 2012. 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). 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 audits 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 also 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, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.
In our opinion, such financial statements present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2012 and 2011, and the changes in net assets available for benefits for the year ended December 31, 2012, in conformity with accounting principles generally accepted in the United States of America.
Our audits were conducted for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplemental schedules of (1) assets (held at end of year) as of December 31, 2012, and (2) assets (acquired and disposed of within year) for the year ended December 31, 2012, and (3) reportable transactions for the year ended December 31, 2012, are presented for the purpose of additional analysis and are not a required part of the basic financial statements, but are 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. These schedules are the responsibility of the Plan’s management. Such schedules have been subjected to the auditing procedures applied in our audit of the basic 2012 financial statements and, in our opinion, are fairly stated in all material respects when considered in relation to the basic financial statements taken as a whole.

/s/ Deloitte & Touche LLP

Milwaukee, Wisconsin
June 21, 2013


3


ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN

STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS

 
December 31, 2012
 
December 31, 2011
Investments (Refer to Notes 7, 8 and 9)

$717,162,980

 

$647,298,220

Notes receivable from participants
10,972,377

 
10,840,454

Net assets available for benefits at fair value
728,135,357

 
658,138,674

Adjustments from fair value to contract value for fully benefit-responsive investment contracts (Refer to Note 2)
(1,536,223
)
 
(441,941
)
Net assets available for benefits

$726,599,134

 

$657,696,733


The accompanying Notes to Financial Statements are an integral part of these statements.

4


ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN

STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
 
 
For the Year Ended December 31,
 
 
2012
Net assets available for benefits - beginning of year
 

$657,696,733

Contributions:
 
 
Cash contributions from employees
 
29,087,416

Employer contributions:
 
 
Cash
 
18,342,920

Cash for purchase of Alliant Energy Corporation common stock
 
207,001

Rollovers from other qualified plans
 
1,007,000

Investment income:
 
 
Interest and dividends
 
14,632,693

Net appreciation in fair value of investments (Refer to Note 7)
 
59,330,616

Net investment income
 
73,963,309

Interest income on notes receivable from participants
 
480,791

Distributions to participants
 
(54,186,036
)
Net increase
 
68,902,401

Net assets available for benefits - end of year
 

$726,599,134


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

5


ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN

NOTES TO FINANCIAL STATEMENTS
AS OF DECEMBER 31, 2012 AND 2011 AND
FOR THE YEAR ENDED DECEMBER 31, 2012

(1) DESCRIPTION OF THE PLAN
The Alliant Energy Corporation 401(k) Savings Plan (the Plan) is a qualified defined contribution plan under Section 401(k) of the Internal Revenue Code (the Code), as amended, and meets the applicable requirements of the Employee Retirement Income Security Act of 1974, as amended. The following brief description of the Plan is provided for general information purposes only. More complete information regarding the Plan is provided in the plan document and summary plan description, which have been made available to all eligible Plan participants (participants). The Plan is administered by the Total Compensation Committee (the Committee) and the Plan sponsor is Alliant Energy Corporate Services, Inc. (a direct subsidiary of Alliant Energy Corporation). The Committee reserves the right to terminate, amend or modify the Plan if future conditions warrant such action.

Any regular employee of Alliant Energy Corporation and its participating subsidiaries (the Company) age 18 and over may participate in the Plan. Regular full-time employees and regular part-time employees customarily scheduled to work at least half-time may participate immediately following 30 days of service. Part-time employees customarily scheduled to work less than half-time may participate after 12 months of service during which he or she has earned at least 1,000 paid hours. Effective for nonbargaining employees hired on or after January 1, 2011 and bargaining employees hired on or after January 1, 2012, an initial automatic 3% pre-tax contribution rate will apply unless the employee makes a contrary election within 30 days of their hire date.

An Employee Stock Ownership Plan (ESOP) is in place within the Plan. Under these provisions, participants have the option to elect to receive cash for any dividends paid on Company common stock within the Plan or to have the dividends reinvested in additional shares based on the current market price.

The Company provides matching contributions of $0.50 for each $1 contributed by the participant up to the first 8% of each respective participant’s eligible compensation. In addition, the Company provides a contribution into each active employee’s 401(k) account each pay period based on a percentage of their base pay (non-elective Company cash contribution) as follows:
Age Plus Years of Service
 
Company Contribution
< 49
 
4%
50 - 69
 
5%
70+
 
6%

Company matching contributions and the non-elective Company cash contributions are generally invested at each participant’s discretion. Participants may subsequently re-designate the distribution of future contributions or transfer existing balances between investment funds on a daily basis, subject to the limits set forth in the Plan.

An “additional” Company contribution is contributed to the accounts of active participants, as of the last day of the Plan year, who contributed at least the maximum level of their compensation eligible to be matched by the Company and did not receive the maximum level of Company matching contributions based on their contributions during the Plan year. The amount of the “additional” Company contribution is the difference between the maximum level of Company matching contributions based on the participants contributions during the Plan year and the amount of Company matching contributions previously received by the participant during the Plan year.

There are certain exceptions to the Company matching contributions and non-elective Company cash contributions described above for bargaining unit employees. These exceptions are dependent on the bargaining unit in which the employee participates and the employee’s date of hire. These exceptions include certain employees being ineligible for the non-elective Company cash contribution and the Company matching contribution being limited to $0.50 for each $1 contributed by the participant up to the first 6% of each respective participant’s eligible compensation. In addition, certain bargaining unit employees are eligible for an additional Company contribution of 1% of their respective eligible compensation (1% Company contribution). Dependent on the bargaining unit which the employee participates in, the 1% Company contribution will be invested in the Alliant Energy Corporation Common Stock Fund or according to the participant’s discretion as a cash

6


contribution. Participants must have at least three years of service before they can diversify investments from this 1% Company contribution invested in the Alliant Energy Corporation Common Stock Fund to different investment funds.

Employee contribution limits for 2012 were as follows:
Eligible employee annual contribution limit as a percentage of compensation
50%
Maximum annual contribution limit (a)

$17,000

(a)
Participants who were at least age 50 by December 31, 2012 were eligible to make additional catch-up contributions of up to $5,500 in 2012. These additional catch-up contributions were not eligible for any Company match.

Participants are immediately vested in their respective employee and employer contributions, except for the non-elective Company cash contribution which is subject to a three year cliff vesting schedule for all new hires. At December 31, 2012 and 2011, forfeited nonvested accounts totaled $26,537 and $57,964, respectively. These accounts will be used to reduce future employer contributions. During the year ended December 31, 2012, employer contributions were reduced by $122,805 from forfeited nonvested accounts.

Contributions under the Plan are held and invested, until distribution, in a Trust Fund maintained by J.P. Morgan Retirement Plan Services LLC (the Trustee or JPMorgan). Individual accounts are maintained by the Trustee for each participant. Each participant’s account is credited with the participant’s contributions, Company contributions, and an allocation of Plan earnings, and charged with withdrawals and an allocation of Plan losses and 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 balance.

The Plan has provisions under which participants who are active employees may take loans up to the lesser of $50,000 or 50% of their total account balance (a $1,000 minimum loan amount and a maximum of three loans for each participant also apply). The Committee determines the loan interest rate pursuant to the Plan. Interest rates on participant loans outstanding ranged from 4.25% to 10.50% at both December 31, 2012 and 2011. Principal and interest are repaid bi-weekly through employee payroll deductions.

(2) SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
(a) Basis of Accounting - The financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP).

(b) Accounting for Fully Benefit-Responsive Contracts - In accordance with FASB authoritative guidance which defines reporting of fully benefit-responsive contracts held by defined-contribution pension plans, the statements of net assets available for benefits present investments at fair value as well as an additional line item showing an adjustment of fully benefit-responsive contracts from fair value to contract value. Certain events, such as a Plan termination or merger, initiated by the Plan sponsor, may limit the ability of the Plan to transact at contract value or may allow for the termination of the wrapper contract at less than contract value. The Committee believes the occurrence of events that may limit the ability of the Plan to transact at less than contract value is not probable.

(c) Valuation of Investments and Income Recognition - The Plan’s investments are stated at fair value. All Guaranteed Investment Contracts (GICs) held by the Plan are fully benefit-responsive contracts and at December 31, 2012 and 2011 all were synthetic GICs. The synthetic GICs are comprised of investments in common collective trusts and other fixed income securities owned by the Plan and an investment contract issued by an insurance company or other financial institution, designed to provide a contract value “wrapper” around the fixed income portfolio to guarantee a specific interest rate. The contract value of all GIC investments was $72,344,936 and $70,581,989 at December 31, 2012 and 2011, respectively. The approximate fair value of these investments was $73,881,159 and $71,023,930 at December 31, 2012 and 2011, respectively, based on the fair value of the underlying assets. The weighted average yields for the GICs based on annualized earnings on December 31, 2012 and 2011 were 1.24% and 2.07%, respectively. The weighted average yields for the GICs based on the interest rate credited to participants on December 31, 2012 and 2011 were 2.00% and 2.69%, respectively. All other Plan investments are carried at fair value as determined by quoted market prices or the net asset value (NAV) of shares held by the Plan on the valuation date. Interest income is accrued when earned. Dividend income is recorded on the ex-dividend date. Investment transactions are recorded on the trade date.

(d) Net Appreciation in Fair Value of Investments - Net realized and unrealized appreciation is recorded in the accompanying statement of changes in net assets available for benefits as “Net appreciation in fair value of investments.”


7


(e) Notes Receivable from Participants - Participant loans are carried at their unpaid principal balance, plus any accrued but unpaid interest.

(f) Payment of Benefits - Benefit payments to participants are recorded when paid.

(g) Expenses - All expenses paid through the Plan are recorded with investment earnings in the accompanying statement of changes in net assets available for benefits. Recordkeeping fees are reported separate from investment earnings on JPMorgan individual participant statements and are paid for directly by the Plan participants. Investment management fees are paid from investment earnings prior to crediting earnings to the individual participant account balances, but can be identified in the investment fund information supplied to participants from JPMorgan. Certain other Plan administrative expenses are absorbed by the Company. Expenses incurred in maintaining Self-Managed Brokerage Accounts are the responsibility of the respective Plan participants.

(h) Use of Estimates - The preparation of financial statements in conformity with GAAP requires the Plan administrator to make estimates and assumptions that affect the reported amounts of net assets available for benefits at the date of the financial statements and the reported amounts of changes in net assets available for benefits during the reporting period. Actual results could differ from those estimates.

(i) Risk and Uncertainties - The Plan invests in various investments, including registered investment companies, common/collective trusts, common stock of the Company and synthetic investment contracts. The Plan also offers a Self-Managed Brokerage Account option which allows participants to invest in a wide range of mutual funds. Investments, in general, are exposed to various risks, such as interest rate, credit, and overall market volatility risks. Due to the level of risk associated with certain investments, it is reasonably possible that changes in the values of certain investments may occur in the near term and that such changes could materially affect the amounts reported in the financial statements.

(3) TAX STATUS
The Internal Revenue Service (IRS) has determined and informed the Company by a letter dated August 25, 2003, that the Plan and related trust are designed in accordance with the applicable sections of the Code. The Plan has been amended since receiving the determination letter and has applied for a new determination letter. The Committee and the Plan’s tax counsel believe that the Plan is designed and is currently being operated in compliance with the applicable requirements of the Code. Therefore, no provision for income taxes has been included in the Plan’s financial statements.

The Plan is subject to routine audits by the IRS; however, there are currently no audits for any tax periods in progress. The Committee believes the Plan is no longer subject to income tax examinations for years prior to 2009.

(4) PLAN TERMINATION PROVISIONS
Upon termination of the Plan in its entirety, each participant is entitled to receive, in accordance with the terms of the Plan, the entire balance in their account. The Company has no intention to terminate the Plan.

(5) WITHDRAWALS AND DISTRIBUTIONS
Withdrawals from participants’ account balances are allowed when participants who are actively employed reach age 70-1/2 (or age 59-1/2 for certain participants). Withdrawals are also allowed due to special “hardship” circumstances. Distributions from the Plan will be made upon termination of employment (by retirement, death, disability or otherwise) if the participant’s account balance is less than $5,000. If a withdrawing participant’s account balance exceeds $1,000 but is less than $5,000, and the participant does not make an election to either have the account paid as a direct rollover or as a cash payment, the distribution will be paid as a direct rollover to an individual retirement account established at the Trustee. If a withdrawing participant’s account balance exceeds $5,000, the participant may elect to defer payment until he or she is age 70-1/2. Distributions can be either in the form of a lump sum, partial distribution or substantially equal annual installments. Effective January 1, 2011, active employees who are at least age 59-1/2 may elect to withdraw all or any portion of their account balance and beneficiaries of deceased employees can remain in the Plan. The unpaid portion of all loans made to the participant, including accrued interest, will be deducted from the amount of the participant account to be distributed. Distributions payable to participants at December 31, 2012 and 2011 were $0. Distributions payable are not included as a liability within net assets available for benefits in the accompanying financial statements, however, they are recorded as liabilities in the Plan’s Form 5500.

(6) DERIVATIVE FINANCIAL INSTRUMENTS
The Plan did not invest in derivative financial instruments during 2012 and 2011.


8


(7) INVESTMENT INFORMATION
Investments held which were greater than 5% of the Plan’s net assets available for benefits as of December 31 were as follows:
 
2012
 
2011
State Street Global Advisors S&P 500 Index Fund, 3,789,605 and 3,797,235 class N shares, respectively

$108,466,083

 

$93,689,171

Alliant Energy Corporation common stock (a)
90,521,754

 
95,938,171

(non-participant directed: $0 (0 shares) and $1,345 (31 shares), respectively)
 
 
 
(participant directed: $90,521,754 (2,061,529 shares) and $95,936,826 (2,174,945 shares), respectively)
 
 
 
American Funds EuroPacific Growth Fund, 2,066,214 and 1,953,375 class R6 shares, respectively
85,086,681

 
68,622,065

Winslow Large Cap Growth Fund, 3,323,027 and 3,672,327 class I shares, respectively
75,698,550

 
73,777,051

PIMCO Total Return Fund, 6,539,427 and 5,498,164 class I shares, respectively
73,503,164

 
59,765,041

JPMorgan Intermediate Bond Fund (a), 4,748,331 and 4,780,360 shares, respectively
69,942,913

 
67,737,697

State Street Global Advisors U.S. Bond Market Index Fund, 4,605,653 and 3,778,238 class C shares, respectively
58,404,289

 
46,003,823

Dodge & Cox Stock Fund, 477,078 and 486,809 shares, respectively
58,155,843

 
49,479,293

(a)
Represents party known to be a party-in-interest to the Plan.

During 2012, the Plan’s investments, including gains and losses on investments acquired and disposed of, as well as held during the year, appreciated (depreciated) in value as follows:
State Street Global Advisors S&P 500 Index Fund

$14,935,183

American Funds EuroPacific Growth Fund
12,079,344

Dodge & Cox Stock Fund
9,741,443

Winslow Large Cap Growth Fund
9,735,118

Buffalo Small Cap Fund
3,316,319

State Street Global Advisors U.S. Bond Market Index Fund
2,087,584

PIMCO Total Return Fund
1,956,573

Columbia Multi-Advisor Small Cap Value Fund
1,825,321

Boston Company Emerging Markets Value Equity Fund
1,654,369

Perkins Mid Cap Value Fund I
1,079,120

Aberdeen Emerging Markets Fund
1,013,954

Wellington Mid Cap Growth Fund
566,895

Self-Managed Brokerage Accounts
130,393

Vanguard Inflation-Protected Securities Fund
33,998

Perkins Mid Cap Value Fund N
(404,965
)
Alliant Energy Corporation common stock (a)
(420,033
)
Net appreciation in fair value of investments

$59,330,616

(a)
Represents party known to be a party-in-interest to the Plan.

(8) FAIR VALUE MEASUREMENTS
Valuation Hierarchy and Techniques - Fair value measurement accounting establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value. The three levels of the fair value hierarchy and a description of the Plan’s assets and valuation techniques for each are as follows:

Level 1 - Pricing inputs are quoted prices available in active markets for identical assets or liabilities as of the reporting date. Level 1 Plan assets include investments in registered investment companies and common stocks and are valued at the closing price reported in the active market in which the individual securities are traded. Assets of participant-directed brokerage accounts at December 31, 2012 and 2011 were limited to investments in registered investment companies.


9


Level 2 - Pricing inputs are quoted prices for similar asset 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 and inputs that are derived principally from or corroborated by observable market data by correlation or other means. Level 2 Plan assets include investments in common/collective trusts and government and agency obligations. Common/collective trusts are valued at the NAV of shares held by the Plan which is based on the fair market value of the underlying investments of the common/collective trusts. The common/collective trusts underlying assets primarily consist of traded securities that have a variety of investment strategies including domestic and international equity and fixed income funds. Government and agency obligations are valued at the closing price reported in the active market in which the individual securities are traded or based on yields currently available on comparable securities of issuers with similar credit ratings.

Level 3 - Pricing inputs are unobservable inputs for assets or liabilities for which little or no market data exist and require significant management judgment or estimation. Level 3 Plan assets include synthetic guaranteed investment contract wrappers. The fair value of synthetic guaranteed investment contract wrappers are calculated using a replacement cost methodology based on current yields of similar instruments with comparable durations considering the credit-worthiness of the issuer. The difference between the present value of the replacement cost and the present value of the actual cost represents the fair value of the synthetic guaranteed investment contract wrappers. The fair value of all synthetic guaranteed investment contract wrappers was $21,833 and $11,560 at December 31, 2012 and 2011, respectively.

The fair value hierarchy gives the highest priority to quoted prices in active markets (Level 1) and the lowest priority to unobservable data (Level 3). In some cases, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. The lowest level input that is significant to a fair value measurement in its entirety determines the applicable level in the fair value hierarchy. Assessing the significance of a particular input to the fair value measurement in its entirety requires judgment, considering factors specific to the asset or liability.

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 at the reporting date.

Fair Value Measurements - Items subject to fair value measurements disclosure requirements at December 31, 2012 and 2011 were as follows:
 
Fair Value Measurements
 
Level 1
 
Level 2
 
Level 3
Assets at December 31, 2012:
 
 
 
 
 
 
 
Registered investment companies:
 
 
 
 
 
 
 
U.S. large cap value

$58,155,843

 

$58,155,843

 

$—

 

$—

U.S. mid cap value
12,659,411

 
12,659,411

 

 

U.S. small cap value
12,019,558

 
12,019,558

 

 

U.S. small cap growth
28,409,105

 
28,409,105

 

 

International - developed markets
85,086,681

 
85,086,681

 

 

International - emerging markets
17,883,510

 
17,883,510

 

 

Fixed income funds
74,780,999

 
74,780,999

 

 

Common/collective trusts:
 
 
 
 
 
 
 
U.S. large cap growth
75,698,550

 

 
75,698,550

 

U.S. large cap core
108,466,083

 

 
108,466,083

 

U.S. mid cap growth
11,411,049

 

 
11,411,049

 

Fixed income funds
132,263,559

 

 
132,263,559

 

Liquidity funds
6,517,407

 

 
6,517,407

 

Common stocks
90,521,754

 
90,521,754

 

 

Participant-directed brokerage accounts
3,267,638

 
3,267,638

 

 

Synthetic guaranteed investment contract wrappers
21,833

 

 

 
21,833

Total assets at fair value

$717,162,980

 

$382,784,499

 

$334,356,648

 

$21,833


10


 
Fair Value Measurements
 
Level 1
 
Level 2
 
Level 3
Assets at December 31, 2011:
 
 
 
 
 
 
 
Registered investment companies:
 
 
 
 
 
 
 
U.S. large cap value

$49,479,293

 

$49,479,293

 

$—

 

$—

U.S. mid cap value
12,156,182

 
12,156,182

 

 

U.S. small cap value
12,010,730

 
12,010,730

 

 

U.S. small cap growth
25,402,918

 
25,402,918

 

 

International - developed markets
68,622,065

 
68,622,065

 

 

Fixed income funds
60,690,196

 
60,690,196

 

 

Common/collective trusts:
 
 
 
 
 
 
 
U.S. large cap growth
73,777,051

 

 
73,777,051

 

U.S. large cap core
93,689,171

 

 
93,689,171

 

U.S. mid cap growth
12,395,019

 

 
12,395,019

 

International - emerging markets
16,351,605

 

 
16,351,605

 

Fixed income funds
113,741,520

 

 
113,741,520

 

Liquidity funds
9,093,314

 

 
9,093,314

 

Common stocks
95,938,171

 
95,938,171

 

 

Government and agency obligations
1,504,581

 

 
1,504,581

 

Participant-directed brokerage accounts
2,434,844

 
2,434,844

 

 

Synthetic guaranteed investment contract wrappers
11,560

 

 

 
11,560

Total assets at fair value

$647,298,220

 

$326,734,399

 

$320,552,261

 

$11,560


Additional information for the Plan’s fair value measurements using significant unobservable inputs (Level 3 inputs) for 2012 was as follows:
 
Synthetic Guaranteed
 
Investment Contract Wrappers
Beginning balance, January 1, 2012

$11,560

Unrealized gains relating to instruments still held at December 31, 2012
10,273

Ending balance, December 31, 2012

$21,833

The amount of total net gains for the period attributable to the change in unrealized gains relating to assets still held at December 31, 2012

$10,273


(9) NON-PARTICIPANT DIRECTED INVESTMENTS
Information about the net assets and the significant components of the changes in net assets relating to the non-participant directed investments was as follows:
 
December 31,
Net assets:
2012
 
2011
Alliant Energy Corporation Common Stock (a)

$—

 

$1,345

 
 
 
Changes in net assets for the period of January 1, 2012 through December 31, 2012:
 
 
Employer contributions

$—

 
Investment activity:
 
 
Net depreciation in fair value of investments
(493
)
 
Dividend income
42

 
Transfers to participant directed investments (Note 1)
(894
)
 
Distributions to participants

 
 

($1,345
)
 
(a)
Represents party known to be a party-in-interest to the Plan.


11


(10) RELATED PARTY TRANSACTIONS
Certain Plan investments are shares of common trust funds managed by an affiliate of the Trustee and shares of common stock of the Company. As of December 31, 2012 and 2011, the Plan held 2,061,529 and 2,174,976 shares of Alliant Energy Corporation common stock with a cost basis of $65,547,951 and $66,098,871, respectively. In 2012 and 2011, the Plan recorded dividend income of $3,828,324 and $3,785,196, respectively, from investments in common stock of the Company. These transactions qualify as exempt party-in-interest transactions.

(11) RECONCILIATION TO FORM 5500
Net assets available for benefits in the accompanying financial statements report fully benefit-responsive investment contracts at contract value, however, the contracts are recorded at fair value in the Plan’s Form 5500. If applicable, distributions payable to participants are not included as a liability within net assets available for benefits in the accompanying financial statements, however, they are recorded as liabilities in the Plan’s Form 5500. The following table reconciles net assets available for benefits per the financial statements to the Plan’s Form 5500 as filed by the Company:
 
2012
 
2011
Net assets available for benefits per financial statements

$726,599,134

 

$657,696,733

Adjustments:
 
 
 
Fair value to contract value for fully benefit-responsive investment contracts
1,536,223

 
441,941

Deemed distributions of participant loans
(94,789
)
 
(73,763
)
Amounts reported per Form 5500

$728,040,568

 

$658,064,911


The following table reconciles the net increase in net assets available for benefits per the financial statements to the Form 5500 as filed by the Company for 2012:
 
Net increase
Amounts reported per financial statements
$68,902,401
Adjustments:
 
Changes in adjustment from fair value to contract value for fully benefit-responsive investment contracts
1,094,282

Deemed distributions of participant loans during 2012
(21,026
)
Amounts reported per Form 5500
$69,975,657


12


ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN

FORM 5500, SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)

AS OF DECEMBER 31, 2012
Identity of issue, borrower,
 
Description of investment including maturity date,
 
 
 
 
lessor, or similar party
 
rate of interest, collateral, par or maturity value
 
Cost(a)
 
Current Value
Registered Investment Companies
 
American Funds EuroPacific Growth Fund, 2,066,214 class R6 shares
 
 
 

$85,086,681

 
 
PIMCO Total Return Fund, 6,539,427 class I shares
 
 
 
73,503,164

 
 
Dodge & Cox Stock Fund, 477,078 shares
 
 
 
58,155,843

 
 
Buffalo Small Cap Fund, 1,008,488 shares
 
 
 
28,409,105

 
 
Aberdeen Emerging Markets Fund, 1,127,586 Institutional shares
 
 
 
17,883,510

 
 
Perkins Mid Cap Value Fund, 593,224 class N shares
 
 
 
12,659,411

 
 
Columbia Multi-Advisor Small Cap Value Fund, 1,880,995 class R5 shares
 
 
 
12,019,558

 
 
Vanguard Inflation-Protected Securities Fund, 44,773 Admiral shares
 
 
 
1,277,835

Common/Collective Trusts
 
State Street Global Advisors S&P 500 Index Fund, 3,789,605 class N shares
 
 
 
108,466,083

 
 
Winslow Large Cap Growth Fund, 3,323,027 class I shares
 
 
 
75,698,550

 
 
JPMorgan Intermediate Bond Fund (b), 4,748,331 shares
 
 
 
69,942,913

 
 
State Street Global Advisors U.S. Bond Market Index Fund, 4,605,653 class C shares
 
 
 
58,404,289

 
 
Wellington Mid Cap Growth Fund, 918,025 shares
 
 
 
11,411,049

 
 
JPMorgan Liquidity Fund (b), 6,517,407 shares
 
 
 
6,517,407

 
 
JPMorgan Mortgage Private Placement Fund (b), 109,640 shares
 
 
 
3,916,357

Corporate Stocks: Common
 
Alliant Energy Corporation common stock (b), 2,061,529 shares
 
 
 
90,521,754

Investment Contracts
 
Aegon, 1.94%
 
 
 
 
 
 
Synthetic Guaranteed Investment Contract Wrapper
 
 
 
21,833

 
 
State Street Bank, 2.28%
 
 
 
 
 
 
Synthetic Guaranteed Investment Contract Wrapper
 
 
 

 
 
ING, 2.38%
 
 
 
 
 
 
Synthetic Guaranteed Investment Contract Wrapper
 
 
 

Participant-Directed Brokerage Accounts
 
Self-Managed Brokerage Accounts
 
 
 
3,267,638

Participant Promissory Notes (b)
 
Maximum allowable loan per participant - $50,000
 
 
 
 
 
 
Various interest rates - 4.25% to 10.50%
 
 
 
 
 
 
Primarily maturing within 5 years
 
 
 
10,972,377

 
 
 
 
 
 

$728,135,357

(a)
Cost value is not required to be disclosed for participant-directed investments.
(b)
Represents party known to be a party-in-interest to the Alliant Energy Corporation 401(k) Savings Plan.

13


ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN

FORM 5500, SCHEDULE H, PART IV, LINE 4i - SCHEDULE OF ASSETS
(ACQUIRED AND DISPOSED OF WITHIN YEAR)

FOR THE YEAR ENDED DECEMBER 31, 2012

Identify of issue, borrower,
 
Description of investment including maturity date,
 
Cost of
 
 
lessor, or similar party
 
rate of interest, collateral, par or maturity value
 
Acquisitions
 
Proceeds of Dispositions
None.
 
 
 
 
 
 


14


ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN

FORM 5500, SCHEDULE H, PART IV

LINE 4j - SCHEDULE OF REPORTABLE TRANSACTIONS

FOR THE YEAR ENDED DECEMBER 31, 2012

Identity of Party Involved and
 
Total Number
 
Total Value
 
Total Number
 
Net Selling
 
Adjusted Cost
 
Net (Gain)
Description of Assets
 
of Purchases
 
of Purchases
 
of Sales
 
Price
 
of Assets Sold
 
(Loss)
Single Transaction Exceeds 5% of Value:
 
 
 
 
 
 
 
 
 
 
 
 
None.
 
 
 
 
 
 
 
 
 
 
 
 
Series of Transactions With Same Broker Exceeds 5% of Value:
 
 
 
 
 
 
 
 
 
 
 
 
None.
 
 
 
 
 
 
 
 
 
 
 
 
Series of Transactions In Same Security Exceeds 5% of Value:
 
 
 
 
 
 
 
 
 
 
 
 
None.
 
 
 
 
 
 
 
 
 
 
 
 
Single Transaction With One Broker Exceeds 5% of Value:
 
 
 
 
 
 
 
 
 
 
 
 
None.
 
 
 
 
 
 
 
 
 
 
 
 




15


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Total Compensation Committee, which administers the Plan, has duly caused this Annual Report to be signed on its behalf by the undersigned, thereunto duly authorized, on this 21st day of June 2013.
 
ALLIANT ENERGY CORPORATION
 
401(k) SAVINGS PLAN
 
 
 
/s/ Wayne A. Reschke
 
Wayne A. Reschke
 
 
 
The foregoing person is the Vice President - Human
 
Resources of Alliant Energy Corporation and
 
Alliant Energy Corporate Services, Inc., and the
 
Chairperson of the Alliant Energy Corporation Total
 
Compensation Committee.


16


EXHIBIT INDEX TO ANNUAL REPORT ON FORM 11-K

ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN

FOR THE YEAR ENDED DECEMBER 31, 2012

Exhibit No.
 
Exhibit
 
Page Number in Sequentially Numbered Form 11-K
23
 
Consent of Independent Registered Public Accounting Firm
 
18



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