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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
 For the fiscal year ended December 31, 2005
 OR
 o
    
    TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE
ACT OF 1934
 For the transition period from  to
 Commission file number 1-12733
 Tower Automotive Union 401(k) Plan




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Financial Report
 December 31, 2005




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Tower Automotive Union 401(k) Plan
  
 ContentsReport Letter
    
    
    1Statement of Net Assets Available for Benefits
    
    
    2Statement of Changes in Net Assets Available for Benefits
    
    
    3Notes to Financial Statements
    
    
    4-8Schedule of Assets Held at End of Year
    
    
    9Consent of Independent Registered Public Accounting Firm




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Tower Automotive Union 401(k) Plan
 
 Statement of Net Assets Available for Benefits
 December 312005
    
    
    2004AssetsParticipant-directed investments:Pooled separate account
    
    $
    12,153,971
    
    
    $
    12,773,202Mutual funds
    
    
    45,862,850
    
    
    
    47,141,331Money market fund
    
    
    53,559
    
    
    
    106,834Tower Automotive, Inc. common stock
    
    
    75,561
    
    
    
    2,245,003Participant loans
    
    
    3,668,505
    
    
    
    4,857,490Total participant-directed investments
    
    
    61,814,446
    
    
    
    67,123,860Receivables:Employer contributions
    
    
    574,158
    
    
    
    21,223Employee contributions
    
    
    63,212
    
    
    
    93,798Total receivables
    
    
    637,370
    
    
    
    115,021Net Assets Available for Benefits
    
    $
    62,451,816
    
    
    $
    67,238,881
  2




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Tower Automotive Union 401(k) Plan
 
 Statement of Changes in Net Assets Available for Benefits
 Year Ended December 312005
    
    
    2004Additions to Net AssetsInvestment income:Interest and dividends
    
    $
    1,586,875
    
    
    $
    802,327Net appreciation (depreciation) in fair
value of investments in:Mutual funds
    
    
    1,369,711
    
    
    
    3,553,070Pooled separate account
    
    
    493,430
    
    
    
    466,568Tower Automotive, Inc.Common stock
    
    
    (2,719,593
    )
    
    
    (1,958,516
    )Total investment income
    
    
    730,423
    
    
    
    2,863,449Contributions:Employer
    
    
    3,156,735
    
    
    
    2,876,296Employee
    
    
    5,234,521
    
    
    
    6,284,714Rollover
    
    
    30,544
    
    
    
    83,923Total contributions
    
    
    8,421,800
    
    
    
    9,244,933Total additions
    
    
    9,152,223
    
    
    
    12,108,382Deductions from Net AssetsBenefits paid directly to participants
    
    
    13,887,900
    
    
    
    3,261,163Administrative expenses
    
    
    35,924
    
    
    
    89,693Total deductions
    
    
    13,923,824
    
    
    
    3,350,856Net (Decrease)/Increase in Net Assets Prior to Transfers
    
    
    (4,771,601
    )
    
    
    8,757,526Transfers(Note 1)
    
    
    (15,464
    )
    
    
    (77,911
    )Net (Decrease)/Increase in Net Assets
    
    
    (4,787,065
    )
    
    
    8,679,615Net Assets Available for BenefitsBeginning of year
    
    
    67,238,881
    
    
    
    58,559,266End of year
    
    $
    62,451,816
    
    
    $
    67,238,881
  3




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Tower Automotive Union 401(k) Plan
 
 Notes to Financial Statements
DECEMBER 31, 2005 AND 2004
 Note 1  Description of the Plan
  General
    Contributions
  Plan Operations
 4




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Tower Automotive Union 401(k) Plan
 Notes to Financial Statements
DECEMBER 31, 2005 AND 2004
 Participant Accounts
 Vesting
 Business Unit
    
    Matching
    
    Profit-SharingBluffton
    
    None
    
    NoneClinton
    
    None
    
    100% at all timesCorydon
    
    100% at all times
    
    20% per year (fully vested
at five years)Granite City  Carpenters Union
    
    100% at all times
    
    100% after three yearsGranite City  UAW Local 3602
    
    100% at all times
    
    100% after three yearsGreenville
    
    100% at all times
    
    NoneKendallville
    
    100% at all times
    
    100% after three yearsPlymouth
    
    100% at all times
    
    100% after three yearsMilan
    
    100% at all times
    
    100% after three yearsTraverse City
    
    100% at all times
    
    100% after three years
 Loans to Participants
 Payment of Benefits
 Forfeited Accounts
 5




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Tower Automotive Union 401(k) Plan
 Notes to Financial Statements
DECEMBER 31, 2005 AND 2004
 Note 2
 Summary of Accounting Policies
 Assets and Liabilities
    Benefit Payments 
 Administrative Expenses
 Use of Estimates
 Risks and Uncertainties
 New Accounting Pronouncements
 6




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Tower Automotive Union 401(k) Plan
 Notes to Financial Statements
DECEMBER 31, 2005 AND 2004
 Note 3  Investments
  2005
    
    
    2004Pooled separate account  New York LifeAnchor Account
    
    $
    12,153,971
    
    
    $
    12,773,202Mutual funds:PIMCO Total Return Fund
    
    
    3,825,118
    
    
    
    4,199,534AIM Basic Value Fund
    
    
    5,999,448
    
    
    
    6,145,428Federated Capital Appreciation Fund
    
    
    6,708,336
    
    
    
    7,935,561Oppenheimer Capital Appreciation Fund
    
    
    3,798,828
    
    
    
    3,764,797AIM Small Cap Growth Fund
    
    
    3,214,506
    
    
    
    3,699,000MainStay Income Manager Fund
    
    
    4,120,970
    
    
    
    4,280,158MainStay
S&P 500 Index Fund
    
    
    6,772,932
    
    
    
    7,339,215Artisan International Fund
    
    
    3,307,363
    
    
    
    2,853,747
 Note 4  Related Party Transactions
   Note 5  Plan Termination
   7




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Tower Automotive Union 401(k) Plan
 Notes to Financial Statements
DECEMBER 31, 2005 AND 2004
  Note 6  Tax Status
  Note 7  Reconciliation with Form 5500
  2005
    
    
    2004Net assets available for benefits per financial
statements
    
    $
    62,451,816
    
    
    $
    67,238,881Less contributions receivable at December 31
    
    
    (637,370
    )
    
    
    (115,021
    )Net assets available for
benefits per Form 5500
    
    $
    61,814,446
    
    
    $
    67,123,860
  Employee
    
    
    EmployerContributions per financial statements
    
    $
    5,234,521
    
    
    $
    3,156,735Less contributions receivable at December 31, 2005
    
    
    (63,212
    )
    
    
    (574,158
    )Plus contributions receivable at December 31, 2004
    
    
    93,798
    
    
    
    21,223Contributions per
Form 5500
    
    $
    5,265,107
    
    
    $
    2,603,800
  Employee
    
    
    EmployerContributions per financial statements
    
    $
    6,284,714
    
    
    $
    2,876,296Less contributions receivable at December 31, 2004
    
    
    (93,798
    )
    
    
    (21,223
    )Plus contributions receivable at December 31, 2003
    
    
    124,437
    
    
    
    354,381Contributions per
Form 5500
    
    $
    6,315,353
    
    
    $
    3,209,454
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Tower Automotive Union 401(k) Plan
 
 Schedule of Assets Held at End of Year
Form 5500, Schedule H, Item 4i
EIN 38-1521832, Plan 004
December 31, 2005
 (a)(b)
    
    (c)
    
    
    
    (e)Identity of Issuer, Borrower,
    
    Description of Investment (Including Maturity Date,
    
    (d)
    
    CurrentLessor, or Similar Party
    
    Rate of Interest, Par, or Maturity Value)
    
    Cost
    
    ValueNew York Life Trust
    
    Pooled separate account  New York LifeCompany
    
    Anchor Account
    
    *
    
    $
    12,153,971Mutual funds:PIMCO Total Return Fund
    
    *
    
    
    3,825,118MainStay Income Manager Fund
    
    *
    
    
    4,120,970AIM Basic Value Fund
    
    *
    
    
    5,999,448MainStay
S&P 500 Index Fund
    
    *
    
    
    6,772,932Franklin Balance Sheet Investment Fund
    
    *
    
    
    2,273,517AIM Small Cap Growth Fund
    
    *
    
    
    3,214,506Artisan Mid Cap Fund
    
    *
    
    
    2,604,872MainStay A MAP Fund
    
    *
    
    
    853,809Federated Capital Appreciation Fund
    
    *
    
    
    6,708,336Fidelity Advisor Value Strategies Fund
    
    *
    
    
    836,970Goldman Sachs Mid Cap Value Fund
    
    *
    
    
    1,546,181Oppenheimer Capital Appreciation Fund
    
    *
    
    
    3,798,828Artisan International Fund
    
    *
    
    
    3,307,363Money market account  MainStay Cash Reserves Fund
    
    *
    
    
    53,559Tower Automotive, Inc.
    
Common stock  Tower Automotive, Inc.
    
    *
    
    
    75,561Participants
    
    Participant loans  Bearing interest at rates ranging
from 5.00 percent to 10.50 percent
    
    
    
    
    3,668,505Total investments
    
    
    
    
    61,814,446
 
  9




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SIGNATURES
 The Plan
 Tower Automotive Union 401(k) PlanDATE:
    
    June 20 , 2006
    
    /s/ Christopher T. Hatto

Christopher T. Hatto, Corporate Controller and ChiefAccounting Officer of Tower Automotive, Inc.




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Exhibit No.
    
    Description23
    
    Consent of Independent Registered Public Accounting firm