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, 2004
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 19 pages
Exhibit Index is on page 18
1
ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN
FINANCIAL STATEMENTS AS OF DECEMBER 31, 2004 AND 2003
AND FOR THE YEAR ENDED DECEMBER 31, 2004,
SUPPLEMENTAL SCHEDULES FOR THE YEAR ENDED DECEMBER 31, 2004, AND
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
2
ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN
TABLE OF CONTENTS
Page No.
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM 4
FINANCIAL STATEMENTS
Statements of Net Assets Available for Plan Benefits
as of December 31, 2004 and 2003 5
Statement of Changes in Net Assets Available for Plan Benefits
for the Year Ended December 31, 2004 6
NOTES TO FINANCIAL STATEMENTS 7-12
SUPPLEMENTAL SCHEDULES
Form 5500, Schedule H, Part IV, line 4i - Schedule of Assets
(Held at End of Year) as of December 31, 2004 13-15
Form 5500, Schedule H, Part IV, line 4j - Schedule of Reportable
Transactions for the Year Ended December 31, 2004 16
SIGNATURES 17
EXHIBIT INDEX 18
Consent of Independent Registered Public Accounting Firm 19
3
Report of Independent Registered Public Accounting Firm
To the Total Compensation Committee and Participants of the Alliant Energy
Corporation 401(k) Savings Plan:
We have audited the accompanying statements of net assets available for plan
benefits of the Alliant Energy Corporation 401(k) Savings Plan (the "Plan")
as of December 31, 2004 and 2003, and the related statement of changes in net
assets available for plan benefits for the year ended December 31, 2004.
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 plan benefits of the Plan as of
December 31, 2004 and 2003, and the changes in net assets available for plan
benefits for the year ended December 31, 2004, 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, 2004, and (2) reportable
transactions for the year ended December 31, 2004, 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 2004
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 16, 2005
4
ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN
STATEMENTS OF NET ASSETS AVAILABLE FOR PLAN BENEFITS
December 31,
2004 2003
--------------------- --------------------
Investment income receivable $8,564,250 $6,819,703
Contributions receivable 374,368 424,518
--------------------- --------------------
Total receivables 8,938,618 7,244,221
--------------------- --------------------
Investments, other than participant promissory notes (Refer to Note 7) 445,595,364 385,431,715
Participant promissory notes 8,742,835 8,213,703
--------------------- --------------------
Total investments 454,338,199 393,645,418
--------------------- --------------------
Net assets available for plan benefits $463,276,817 $400,889,639
===================== ====================
The accompanying Notes to Financial Statements are an integral part of these statements.
5
ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN
STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR PLAN BENEFITS
For the Year Ended December 31, 2004
Net assets available for plan benefits - beginning of year $400,889,639
Contributions:
Cash contributions from employees 26,470,660
Employer contributions:
Cash for purchase of Alliant Energy Corporation common stock 7,750,725
Cash 692,957
Rollovers from other qualified plans 537,947
Investment activity:
Net appreciation in fair value of investments (Refer to Note 7) 38,741,362
Investment income 9,343,320
Distributions to participants (21,149,793)
----------------
Net assets available for plan benefits - end of year $463,276,817
================
The accompanying Notes to Financial Statements are an integral part of this statement.
6
ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN
NOTES TO FINANCIAL STATEMENTS
FOR THE YEAR ENDED DECEMBER 31, 2004
Note 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 summary plan description, which has 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),
which 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.
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.
Also, the Company is eligible for the dividend deduction provisions of
Section 404(k) of the Code for Company common stock held in the ESOP.
The Company provides matching contributions for each $1 contributed by
participants up to a maximum of the first 6% of each respective participant's
eligible compensation. Other than the exceptions noted below, Company match
information and employee contribution limits for 2004 were as follows:
Company match for each $1 contributed up to the maximum $0.50
Eligible employee annual contribution limit as a
percentage of compensation 50%
Maximum annual contribution limit $13,000
Company contributions for Alliant Energy Resources, Inc. (Resources) and
Cedar Rapids and Iowa City Railway Company (CRANDIC) employees are calculated
based on a percentage of base pay, without overtime or incentive pay, and
there is a "basic" Company contribution equal to 4% and 2%, respectively, of
base pay.
Resources and CRANDIC employees may be eligible for a "discretionary"
Company contribution of $0.50 for every $1 contributed up to a maximum of the
first 6% of pay in addition to the "basic" Company contribution. The
"discretionary" contribution for both Resources and CRANDIC employees is based
on goals established by Resources and is typically determined and paid during
the first quarter of the following year. The "discretionary" Company
contributions for 2004 and 2003 were $374,368 and $424,518, respectively.
An "additional" Company contribution is allocated to the accounts of
active participants, except for Resources and CRANDIC employees, as of the
last day of the Plan year, who contributed at least 6% of compensation during
the Plan year and did not receive a Company matching contribution equal to 3%
of compensation. The amount of the "additional" Company contribution is the
difference between 3% of compensation during the Plan year and the amount of
Company matching contributions previously received during the Plan year.
7
Participants who were at least age 50 by Dec. 31, 2004 were eligible to
make catch-up contributions of up to $3,000 in 2004. These catch-up
contributions were not eligible for any Company match.
All Company contributions are invested in the Alliant Energy Corporation
Common Stock Fund, except for Company "basic" contributions for Resources and
CRANDIC employees which are invested at each participant's discretion.
Participants are immediately vested in their respective employee and
employer contributions.
Contributions under the Plan are held and invested, until distribution,
in a Trust Fund maintained by American Express Trust Company (the Trustee), a
division of American Express Financial Advisors Inc.
Participants may subsequently redesignate 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. As previously
described, Company matching contributions invested in the Alliant Energy
Corporation Company Stock Fund may not be transferred to any other investment
fund, except for "basic" contributions made for CRANDIC and Resources
employees. However, Company matching contributions may be transferred by
certain participants during the 30-day period immediately prior to retirement
and participants age 55 with 10 years of service are eligible to diversify up
to 100% of their ESOP account to one or more of the investment options.
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 ranged from
5.0% to 10.5% at both Dec. 31, 2004 and 2003. Principal and interest are
repaid bi-weekly through employee payroll deductions.
Note 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) Valuation of Investments and Income Recognition - All Guaranteed
Investment Contracts (GIC's) held by the Plan are fully benefit responsive
and are valued at contract value, which represents contributions made under
the contract, plus interest at the contract rate (less funds used to pay plan
benefits). The carrying value of all GIC investments was $35,339,962 and
$38,189,962 at Dec. 31, 2004 and 2003, respectively. The approximate fair
value of these investments was $43,639,028 and $46,026,501 at Dec. 31, 2004
and 2003, respectively, based on the discounted cash flows valuation method.
Under the terms of the GIC's, the weighted average crediting interest rate
was 5.00% and 4.08% on Dec. 31, 2004 and 2003, respectively, and is reset
quarterly for all contracts. The GIC's earned an average rate of 4.80% in
2004. Participant loans are carried at unpaid principal balances due. All
other Plan investments are carried at fair value as determined by quoted
market prices, except for the American Express Trust Income Fund I. The
American Express Trust Income Fund I is a common collective trust fund,
which includes investments in fully benefit responsive GIC's and is reported
at contract value, which approximates fair value. Interest income is accrued
when earned. Dividend income is recorded on the ex-dividend date. Investment
transactions are recorded on the trade date.
(c) 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 plan benefits as "Net appreciation in fair value
of investments."
(d) Payment of Benefits - Benefit payments to participants are recorded when
paid.
8
(e) Expenses - Investment management fees are paid from investment earnings
prior to crediting earnings to the individual participant account balances.
Most 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.
(f) 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 plan benefits at
the date of the financial statements and the reported amounts of changes in
net assets available for plan benefits during the reporting period. Actual
results could differ from those estimates.
(g) Risk and Uncertainties - The Plan invests in various investments,
including common investment funds, mutual funds, common stock of the Company
and 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. Due to the level of
risk associated with certain investments, it is reasonably possible that
changes in the values of certain investments will occur in the near term and
that such changes could materially affect the amounts reported in the
financial statements.
Note 3. Tax Status
The Internal Revenue Service has determined and informed the Company by
a letter dated Aug. 25, 2003, that the Plan and related trust are designed in
accordance with the applicable sections of the Code. It is the intention of
the Company to adopt any amendments necessary to maintain the qualified
status of the Plan.
Note 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.
Note 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 the 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 or substantially equal annual installments. 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 Dec. 31, 2004 and 2003 were $25,656
and $0, respectively. Distributions payable are not recorded in the
accompanying financial statements, however, they are recorded in the Plan's
Form 5500 (refer to Note 10).
Note 6. Derivative Financial Instruments
The Plan did not invest in any material derivative financial instruments
during 2004 and 2003.
9
Note 7. Other Investment Information
Investments held which were greater than 5% of the Plan's net assets
available for plan benefits as of Dec. 31 were as follows:
2004 2003
-------------- --------------
Alliant Energy Corporation Common Stock* $108,063,758 $89,235,309
(non-participant directed: $63,508,962 (2,220,593 shares) and
$48,442,726 (1,945,491 shares), respectively)
(participant directed: $44,554,796 (1,557,860 shares) and $40,792,583
(1,638,256 shares), respectively)
American Express Trust Equity Index Fund III*, 2,340,750 and
2,449,624 shares, respectively 76,942,777 72,695,049
American Funds Growth Fund of America, 2,572,065 and 2,509,599
shares, respectively 70,423,142 61,585,565
American Express Trust Long-Term Horizon (65:35) Fund*, 2,660,902
and 2,729,903 shares, respectively 33,931,822 31,904,378
Dodge & Cox Stock Fund, 196,080 and 127,389 shares, respectively 25,533,595 14,494,303
Brown Capital Management Small Company Fund, 822,599 and 895,853
shares, respectively 24,513,456 26,633,723
PIMCO Total Return Fund, 1,941,165 and 1,887,924 shares, respectively 20,712,227 20,219,670
* Represents party known to be a party-in-interest to the Plan.
During 2004, 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:
Alliant Energy Corporation Common Stock $13,866,178
American Express Trust Equity Index Fund III 7,563,061
American Funds Growth Fund of America 7,216,827
American Express Trust Long-Term Horizon (65:35) Fund 2,835,135
Dodge & Cox Stock Fund 2,698,166
American Funds EuroPacific Growth Fund 2,599,976
Dreyfus Premier Emerging Markets Fund 653,655
State Street Global Advisors S&P Midcap Index Fund 528,085
Evergreen Small Cap Value Fund 365,571
American Express Trust Income Fund I 262,515
Vanguard Mid-Cap Index Fund 150,758
American Express Trust Long-Term Horizon (80:20) Fund 115,326
American Express Trust Short-Term Horizon (25:75) Fund 40,824
American Express Trust Bond Index Fund II 12,814
Self-Managed Brokerage Accounts 11,582
Brown Capital Management Small Company Fund (89,258)
PIMCO Total Return Fund (89,853)
------------
Net appreciation in fair value of investments $38,741,362
============
10
Note 8. 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:
As of Dec. 31,
Net assets: 2004 2003
------------- -------------
Alliant Energy Corporation Common Stock* $63,508,962 $48,442,726
American Express Trust Money Market Fund I* 993,002 605,615
Contributions receivable 374,368 424,518
Investment income receivable 697 441
------------- -------------
$64,877,029 $49,473,300
============= =============
For the Year Ended
Changes in net assets: Dec. 31, 2004
------------------
Employer contributions $7,750,725
Investment activity:
Net appreciation in fair value of investments 7,936,617
Investment income 2,133,932
Transfers to participant directed investments (482,303)
Distributions to participants (1,935,242)
------------
$15,403,729
============
* Represents party known to be a party-in-interest to the Plan.
Note 9. Related Party Transactions
Certain Plan investments are shares of mutual funds and common trust
funds managed by an affiliate of the Trustee and shares of common stock of
the Company. As of Dec. 31, 2004 and 2003, the Plan held 3,778,453 and
3,583,747 shares of Alliant Energy Corporation common stock with a cost basis
of $92,640,650 and $87,615,743, respectively. During the years ended Dec.
31, 2004 and 2003, the Plan recorded dividend income of $3,705,802 and
$3,344,162, respectively, from investments in common stock of the Company.
These transactions qualify as party-in-interest.
Note 10. Reconciliation to Form 5500
Distributions payable to participants are not included in the
accompanying financial statements, however, they are recorded in the Plan's
Form 5500. The following table reconciles net assets available for plan
benefits per the financial statements to the Plan's Form 5500 as filed by the
Company for the year ended Dec. 31:
2004 2003
-------------- ------------
Net assets available for plan
benefits per financial statements $463,276,817 $400,889,639
Adjustments:
Benefits requested not yet paid (25,656) --
-------------- ------------
Amounts reported per Form 5500 $463,251,161 $400,889,639
============== ============
11
The following table reconciles certain changes in net assets available
for plan benefits per the financial statements to the Form 5500 as filed by
the Company for the year ended Dec. 31, 2004:
Distributions to
Participants
----------------
Amounts reported per financial statements ($21,149,793)
Adjustments:
Changes in benefits requested not yet paid (25,656)
-----------------
Amounts reported per Form 5500 ($21,175,449)
=================
Note 11. Subsequent Event
On Aug. 1, 2005, it is expected that the Trustee will change its name to
Ameriprise Trust Company, and American Express Financial Advisors Inc. will
begin operating as Ameriprise Financial Services, Inc.
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, 2004
Identity of issue, borrower, Description of investment including maturity date, Current
lessor, or similar party rate of interest, collateral, par or maturity value Cost Value
---------------------------------- ------------------------------------------------------------------ ------------- --------------
Registered Investment Companies Evergreen Small Cap Value Fund, 216,771 shares $4,520,031 $5,074,605
American Funds Growth Fund of America, 2,572,065 shares 50,263,175 70,423,142
PIMCO Total Return Fund, 1,941,165 shares 20,952,129 20,712,227
Dodge & Cox Stock Fund, 196,080 shares 20,500,585 25,533,595
Brown Capital Management Small Company Fund, 822,599 shares 19,402,020 24,513,456
Dreyfus Premier Emerging Markets Fund, 354,871 shares 6,277,245 6,959,020
American Funds EuroPacific Growth Fund, 526,727 shares 16,035,870 18,572,401
Common/Collective Trusts American Express Trust Money Market Fund I*, 3,547,995 shares 3,547,995 3,547,995
American Express Trust Short-Term Horizon (25:75) Fund*, 42,155
shares 810,431 852,918
American Express Trust Long-Term Horizon (65:35) Fund*, 2,660,902
shares 26,570,252 33,931,822
American Express Trust Long-Term Horizon (80:20) Fund*, 54,546
shares 1,302,834 1,419,236
American Express Trust Equity Index Fund III*, 2,340,750 shares 68,063,447 76,942,777
American Express Trust Income Fund I*, 137,429 shares 8,297,933 9,081,602
American Express Trust Investment Grade Bond Fund*, 273,592 shares 4,070,987 4,447,234
American Express Trust Bond Index Fund II*, 33,412 shares 465,077 475,489
State Street Global Advisors S&P Midcap Index Fund, 176,674 shares 4,794,443 5,337,675
Corporate Stocks: Common Alliant Energy Corporation common stock*, 3,778,453 shares 92,640,650 108,063,758
Corporate Bonds AMCAR 2002-C AR, 3.55%, 2/12/08, par value $100,000 99,982 100,347
AMCAR 2003-CF A3, 2.75%, 10/9/07, par value $175,000 177,728 174,558
AMCAR 2004-AF A3, 2.18%, 7/7/08, par value $200,000 199,988 198,313
AMCAR 2004-CA A3, 3.00%, 3/6/09, par value $150,000 149,985 148,687
AMSI 2004-R7 A2, 2.55%, 8/25/34, par value $89,078 89,078 89,085
BOAA 2003-1-A1, 5.00%, 2/25/33, par value $151,156 152,171 152,598
BOAMS 2004-E 2A6, 4.13%, 6/25/34, par value $150,000 148,781 147,842
CWL 2004-5 4A1, 2.53%, 8/25/23, par value $112,411 112,411 112,415
COAFT 2002-B A4A, 3.32%, 4/15/09, par value $100,000 101,969 100,089
COAFT 2003-A A3A, 1.83%, 10/15/07, par value $130,578 130,124 129,886
COAFT 2004-A A3, 3.07%, 7/15/08, par value $100,000 99,999 99,446
Centex Home Eq 2004-A AF3, 3.26%, 4/25/28, par value $150,000 149,996 147,695
CFAB 2004-2 2A1, 2.55%, 1/25/25, par value $99,731 99,731 99,716
CSFB 2004-C1 A2, 3.52%, 1/15/37, par value $100,000 100,500 98,467
FSPC T-17 A4 ABS HEL, 6.93%, 1/25/26, par value $66,469 66,467 66,484
GMACC 2002-C2 A1, 4.32%, 10/15/38, par value $151,862 154,567 153,470
GSMS 2004-GG2 A2, 4.29%, 8/1/38, par value $150,000 150,747 151,636
HART 2003-A A3, 2.33%, 11/15/07, par value $150,000 149,998 148,727
LBUBS 2004-C4 A2, 4.57%, 5/15/34, par value $150,000 153,697 152,853
LB-UBS 2002-A2, 4.90%, 6/15/26, par value $200,000 200,995 206,021
LBUBS 2004-C6 A2, 4.19%, 8/15/29, par value $200,000 200,995 200,076
LBUBS 2003-C7 A2, 4.06%, 9/15/27, par value $185,000 186,356 185,080
LBUBS 2003-C8 A2, 4.21%, 11/15/27, par value $150,000 150,744 151,101
LBUBS 2004-C2 A2, 3.25%, 3/15/29, par value $150,000 144,686 145,460
LBMLT 2004-3 A2, 2.54%, 7/25/34, par value $107,419 107,419 107,421
MARM 2004-3 3A2, 4.50%, 4/25/34, par value $129,431 132,019 129,165
MSCI 2004-IQ8-A2, 3.96%, 6/15/40, par value $250,000 252,676 250,211
MSM 2004-2AR 3A, 5.05%, 2/25/34, par value $161,695 165,585 163,129
MSM 2004-10AR 1A, 4.82%, 11/25/34, par value $141,712 144,280 143,815
RALI SER 2003-QS4 ABS, 5.50%, 9/25/33, par value $179,562 184,598 181,173
RASC 2004-KS8 A13, 3.84%, 9/25/34, par value $125,000 124,980 124,395
RASC SER 2002-KS1, 5.864%, 11/25/29, par value $192,758 205,468 193,762
SASCO CMO 2004-12H, 5.56%, 4/25/34, par value $110,288 112,774 112,291
VWALT 2004-A-A3, 2.84%, 7/20/07, par value $150,000 149,997 149,133
WESTO 2002-1 A4A, 4.87%, 9/20/09, par value $150,000 156,633 152,032
WESTO 2002-2 A4, 4.50%, 2/20/10, par value $150,000 155,865 151,927
WESTO 2003-4 A3, 2.39%, 1/22/08, par value $150,000 149,994 149,320
WBCMT 2003-C8 A2, 3.89%, 11/15/35, par value $150,000 150,745 149,525
13
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, 2004 (Continued)
Identity of issue, borrower, Description of investment including maturity date, Current
lessor, or similar party rate of interest, collateral, par or maturity value Cost Value
---------------------------------- ------------------------------------------------------------------ ------------- --------------
Government and Agency Obligations FHLMC Gold #E91326, 6.50%, 9/1/17, par value $91,927 97,385 97,345
FHLMC Gold #E96180, 4.50%, 5/1/13, par value $138,779 143,984 139,699
FHLMC Gold #E96579, 4.50%, 6/1/13, par value $161,377 167,353 162,437
FHLMC Gold #E97247, 5.00%, 6/1/18, par value $121,903 124,494 123,978
FHLMC MTN, 3.525%, 12/20/07, par value $370,000 370,000 370,226
FHLMC, 2.85%, 2/23/07, par value $300,000 296,670 296,697
FHLMC Gold #C66932, 6.00%, 5/1/32, par value $77,995 78,166 80,681
FHLMC Gold #B10258, 5.00%, 10/1/18, par value $290,539 295,715 295,287
FHLMC Gold #B10776, 5.00%, 11/1/13, par value $123,046 126,314 125,852
FHLB, 3.00%, 5/15/06, par value $290,000 291,134 289,586
FHLB, 2.50%, 3/13/06, par value $300,000 300,102 298,038
Fed Home Loan Bank, 2.88%, 5/22/06, par value $475,000 474,069 473,482
Fed Home Loan Bank, 3.25%, 12/17/07, par value $170,000 169,466 168,657
Federal Farm Credit Bank, 2.38%, 10/2/06, par value $150,000 150,473 147,912
Federal Farm Credit Bank, 2.13%, 7/17/06, par value $250,000 249,522 246,092
FHLMC 2393-A CMO, 5.50%, 4/15/30, par value $22,549 22,973 22,657
FHLMC, 5.50%, 7/15/06, par value $150,000 157,088 155,228
FHLMC Reference Notes, 4.25%, 7/15/09, par value $475,000 487,774 483,391
FHLMC ARM #781884, 5.20%, 8/1/34, par value $98,650 99,960 99,521
FHLMC (Non Gold) Arm #782436, 5.01%, 10/1/34, par value $147,481 150,799 149,671
FNMA, 3.88%, 11/17/08, par value $350,000 349,202 349,496
FNMA Benchmark, 2.25%, 2/28/06, par value $145,000 143,912 143,676
FNMA, 3.00%, 3/2/07, par value $220,000 219,593 218,627
FNMA Benchmark, 3.13%, 12/15/07, par value $65,000 64,994 64,360
FNMA 15yr #252260, 6.00%, 3/1/10, par value $512,781 510,297 538,474
FNMA #254187, 5.00%, 12/1/08, par value $318,937 317,193 324,467
FNMA #254291, 7.00%, 4/1/17, par value $120,175 128,174 127,409
FNMA #254757, 5.00%, 3/31/13, par value $133,650 139,664 136,610
FNMA #535170, 5.50%, 9/1/14, par value $140,518 144,997 145,622
FNMA #545701, 7.00%, 7/1/12, par value $158,408 169,298 165,721
FNMA #545864, 5.50%, 8/1/17, par value $220,934 224,196 229,222
FNMA #555655, 4.45%, 7/1/33, par value $254,080 257,057 255,193
FNMA #555740, 4.50%, 9/1/18, par value $258,383 253,135 258,303
FNMA #640996, 7.50%, 5/1/32, par value $79,659 85,235 85,286
FNMA #648349, 6.00%, 6/1/17, par value $93,746 98,053 98,705
FNMA 2002-W3 A3, 6.00%, 7/25/24, par value $164,624 165,068 165,746
FNMA 2002-W5 A6, 6.00%, 8/25/32, par value $166,553 167,724 167,023
FNMA 2002-W4 A3, 5.30%, 4/25/42, par value $323,694 324,503 326,098
FNMA 2002-W9 A3, 5.00%, 8/25/42, par value $153,438 154,313 154,150
FNMA CMO 03-W2-2A6, 5.50%, 7/25/42, par value $68,709 71,071 68,723
FHLMC 2492-B, 5.50%, 5/15/13, par value $332,019 346,597 338,746
FNMA #200394, 5.50%, 7/25/23, par value $300,000 313,172 308,311
FHLMC 2617 HD, 7.00%, 6/15/16, par value $118,399 128,611 127,380
FNMA 2003-109 CX, 4.00%, 7/25/16, par value $150,000 150,791 149,245
FNMA 2003-106 B, 4.50%, 10/25/19, par value $191,463 195,352 192,466
FNMA 2003-W16 AF3, 2.91%, 1/25/29, par value $150,000 149,997 149,766
FNMA 2003-133 GB, 8.00%, 12/25/26, par value $73,127 80,131 78,563
FHLMC_2641, 6.50%, 1/15/18, par value $120,327 128,402 127,975
FNMA 2004-21 AC, 4.00%, 5/25/16, par value $200,000 204,687 200,625
FNMA 2004-W3 A2, 3.75%, 5/25/34, par value $125,000 127,344 123,640
FNMA 2004-W3 A14, 3.50%, 5/25/34, par value $85,343 85,610 85,063
FNMA 2004-W3 A15, 5.00%, 5/25/34, par value $100,000 104,641 101,751
FNMA 2004-W4 A2, 5.00%, 6/25/34, par value $150,000 157,242 152,800
FNMA 2004-W8, 7.50%, 6/25/44, par value $83,710 89,315 89,956
FNMA 2004-60 PA, 5.50%, 4/25/34, par value $146,796 151,647 151,777
FHLMC 2657 NT, 5.00%, 1/15/16, par value $150,000 156,117 153,865
FHLMC 2663 BA, 4.00%, 8/15/16, par value $82,544 81,461 82,194
FHLMC 2672 NT, 5.00%, 2/15/16, par value $200,000 208,289 205,039
FHLMC 2662 DB, 5.00%, 2/15/16, par value $150,000 156,047 153,875
FHLMC 2681 PJ, 5.00%, 10/15/15, par value $300,000 313,734 308,212
14
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, 2004 (Continued)
Identity of issue, borrower, Description of investment including maturity date, Current
lessor, or similar party rate of interest, collateral, par or maturity value Cost Value
---------------------------------- ------------------------------------------------------------------ ------------ --------------
FHLMC 2688 DE, 4.50%, 2/15/20, par value $150,000 151,359 151,216
FHLMC 2716 UA, 4.50%, 7/15/20, par value $268,388 267,717 270,502
FHLMC 2750 DB, 4.50%, 5/15/15, par value $150,000 153,586 152,593
FHLMC 2822 ZN, 5.00%, 1/15/33, par value $41,574 41,288 40,878
FHLMC 2843-BA, 5.00%, 1/15/18, par value $140,442 143,915 142,538
FHLMC 2907-AG, 4.50%, 3/15/19, par value $125,000 124,961 126,256
FHLMC, 3.50%, 9/15/07, par value $725,000 716,894 727,071
FNMA #685433, 6.50%, 3/1/33, par value $187,532 198,037 197,185
FNMA #705304, 4.90%, 6/1/33, par value $174,887 177,442 179,939
FNMA ARM #722781, 4.27%, 9/1/33, par value $459,008 453,987 458,374
FNMA #725090, 4.80%, 11/1/33, par value $139,469 138,729 139,638
FNMA ARM #725737, 4.53%, 8/1/34, par value $98,575 97,389 99,045
FNMA #732002, 4.25%, 8/1/33, par value $105,295 107,039 106,038
FNMA #764082, 4.78%, 1/1/34, par value $127,987 130,087 129,593
FNMA ARM #768193, 4.58%, 3/1/34, par value $161,085 164,703 162,216
FNMA ARM #799769, 5.07%, 11/1/34, par value $149,983 152,983 152,424
FNMA ARM #801344, 5.10%, 10/1/34, par value $145,752 148,394 148,102
FNMA 2003-W18 1A5, 4.61%, 8/25/43, par value $100,000 101,172 100,556
FNMA 2004-W10 A23, 5.00%, 8/25/34, par value $125,000 128,770 126,750
VENDEE 2003-2 C, 5.00%, 7/15/20, par value $100,000 103,406 101,040
U.S. Treasury Note, 3.25%, 8/15/07, par value $265,000 274,813 265,393
U.S. Treasury Note, 1.88%, 1/31/06, par value $1,525,000 1,516,717 1,510,346
U.S. Treasury Note, 2.25%, 2/15/07, par value $1,065,000 1,073,830 1,046,945
U.S. Treasury Note, 2.75%, 8/15/07, par value $800,000 792,167 791,218
U.S. Treasury Note, 4.25%, 8/15/04, par value $475,000 477,448 476,058
U.S. Treasury Note, 2.88%, 11/30/06, par value $600,000 598,969 598,125
U.S. Treasury Note, 3.63%, 12/15/09, par value $1,785,000 1,782,404 1,776,353
Investment Contracts Monumental Life Insurance Company, 4.09%, 12/31/50
Synthetic Guaranteed Investment Contract Wrapper - (41,973)
Bank of America NA, 5.45%, 12/31/50
Synthetic Guaranteed Investment Contract Wrapper - (87,448)
Rabobank International, 4.80%, 12/31/50
Synthetic Guaranteed Investment Contract Wrapper - 35,617
IXIS Capital Markets, 3.31%, 12/31/50
Synthetic Guaranteed Investment Contract Wrapper - 25,405
JP Morgan Chase & Co., 3.94%, 12/31/50
Synthetic Guaranteed Investment Contract Wrapper - (14,458)
UBS Warburg, 3.61%, 12/31/50
Synthetic Guaranteed Investment Contract Wrapper - (5,096)
State Street Bank and Trust Company, 3.23%, 12/31/50
Synthetic Guaranteed Investment Contract Wrapper - 27,852
AIG Financial Products Corp., 3.32%, 12/31/50
Synthetic Guaranteed Investment Contract Wrapper - (81,860)
United of Omaha, 2.48%, 5/20/05 2,004,213 2,004,213
John Hancock Life Insurance Company, 7.69%, 3/31/05 2,115,241 2,115,241
New York Life Insurance Company, 7.41%, 8/15/05 2,056,032 2,056,032
Hartford, 5.21%, 11/15/06 2,012,842 2,012,842
Protective Life Insurance Company, 6.12%, 6/15/06 2,066,167 2,066,167
Participant-Directed Brokerage
Accounts Self-Managed Brokerage Accounts 115,152 126,092
Participant Promissory Notes Maximum allowable loan -- $50,000
Various interest rates -- 5.0% to 10.5%
Primarily maturing within 5 years - 8,742,835
------------ ---------------
$386,237,992 $462,094,753(1)
============ ===============
(1) The difference between the total current value on this Schedule H, Part IV, Line 4i and the total investments on the Statement
of Net Assets Available for Plan Benefits as of Dec. 31, 2004 is equal to accrued interest on the Guaranteed Investment
Contracts.
* Represents party known to be a party-in-interest to the Alliant Energy Corporation 401(k) Savings Plan.
15
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, 2004
Identity Total Total Total Net Adjusted Net
of Party Involved and Number of Value of Number Selling Cost of Gain
Description of Assets Purchases Purchases (1) of Sales Price (1) 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:
American Express Trust Money Market Fund I 384 $47,425,374 455 $48,010,220 $48,010,220 $ -
-----------------------------------------------------------------------------------------------------------------------------------
Single Transaction With One Broker Exceeds 5% of
Value:
None.
-----------------------------------------------------------------------------------------------------------------------------------
(1) The purchase/selling price was equal to the fair value on the date of purchase/sale.
16
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 29th day of June 2005.
ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN
/s/ Jonathan C. Day
--------------------
Jonathan C. Day
The foregoing person is the Director - Total
Compensation of Alliant Energy Corporation and
the Chairperson of the Alliant Energy Corporation
Total Compensation Committee.
17
EXHIBIT INDEX TO ANNUAL REPORT ON FORM 11-K
ALLIANT ENERGY CORPORATION
401(k) SAVINGS PLAN
FOR THE YEAR ENDED DECEMBER 31, 2004
Page Number in
Sequentially
Numbered
Exhibit No. Exhibit Form 11-K
----------- ------- --------------
23 Consent of Independent Registered 19
Public Accounting Firm
18