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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 11-K
FOR ANNUAL REPORTS OF EMPLOYEE STOCK
PURCHASE, SAVINGS AND SIMILAR PLANS
PURSUANT TO SECTION 15(d) OF THE
SECURITIES EXCHANGE ACT OF 1934
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
Commission File No.: 001-16577
A. Full title of the plan and the address of the plan, if different from that of the issuer named below:
Flagstar Bank 401(k) Plan
B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:
Flagstar Bancorp, Inc.
5151 Corporate Drive
Troy, MI 48098
 
 

 


 

TABLE OF CONTENTS
     
  3
 
   
  4
 
   
Financial Statements
   
 
   
  5
 
   
  6
 
   
  7
 
   
Supplemental Information
   
 
   
  12
 
   
  16
 
   
  18
 
   
  19

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Participants and Administrator of
Flagstar Bank 401(k) Plan
We have audited the accompanying statement of net assets available for benefits of Flagstar Bank 401(k) Plan (the “Plan”) as of December 31, 2005, and the related statement of changes in net assets available for benefits for the year ended December 31, 2005. These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audit.
We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Plan is not required to have, nor were we engaged to perform an audit of its internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Plan’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion.
In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2005, and the changes in net assets available for benefits for the year ended December 31, 2005, in conformity with accounting principles generally accepted in the United States of America.
Our audit was performed for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplemental schedule, Schedule H, line 4i—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 Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. This supplemental schedule is the responsibility of the Plan’s management. The supplemental schedule has been subjected to the auditing procedures applied in our audit of the basic financial statements and, in our opinion, is fairly stated in all material respects in relation to the basic financial statements taken as a whole.
/s/ Virchow, Krause & Company, LLP
Southfield, Michigan
June 12, 2006

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
To the Participants and Administrator of
Flagstar Bank 401(k) Plan
We have audited the accompanying statement of net assets available for benefits of Flagstar Bank 401(k) Plan (the “Plan”) as of December 31, 2004. This financial statement is the responsibility of the Plan’s management. Our responsibility is to express an opinion on this financial statement based on our audit.
We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Plan is not required to have, nor were we engaged to perform an audit of its internal control over financial reporting. Our audit included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Plan’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audit provides a reasonable basis for our opinion.
In our opinion, the financial statement referred to above presents fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2004, in conformity with accounting principles generally accepted in the United States of America.
/s/ Grant Thornton LLP
Southfield, Michigan
June 27, 2005

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Flagstar Bank 401(k) Plan
Statements of Net Assets Available for Benefits
                 
    December 31,
    2005   2004
     
Assets
               
Investments — at fair value
               
Flagstar Bancorp, Inc. common stock
  $ 12,381,408     $ 18,204,390  
Mutual funds
    55,748,380       46,926,740  
Money market funds
    6,973,753       6,566,992  
Common/Collective trusts
    20,936       19,424  
Participant loans
    2,723,215       2,453,374  
     
Total investments
    77,847,692       74,170,920  
Receivables:
               
Employer contributions
    126,623        
Participant contributions
    300,864       1,886  
Other
    4,185       76,212  
     
Total receivables
    431,672       78,098  
     
Total assets
    78,279,364       74,249,018  
Liabilities
               
Refundable contributions
    13,253       138,931  
     
Total liabilities
    13,253       138,931  
     
Net assets available for benefits
  $ 78,266,111     $ 74,110,087  
     
The accompanying notes are an integral part of these statements.

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Flagstar Bank 401(k) Plan
Statement of Changes in Net Assets Available for Benefits
For the year ended December 31,
         
    2005  
Additions
       
Additions to net assets attributed to:
       
Investment income:
       
Net depreciation in fair value of investments
  $ (2,336,700 )
Interest and dividends
    1,778,271  
 
     
Total investment loss
    (558,429 )
Contributions:
       
Participant
    9,227,184  
Employer
    3,285,530  
Rollovers
    473,449  
 
     
Total contributions
    12,986,163  
 
     
Total additions
    12,427,734  
 
     
Deductions
       
Deductions from net assets attributed to:
       
Participant benefits paid
    8,204,247  
Administrative fees
    55,638  
Deemed distributions
    11,825  
 
     
Total deductions
    8,271,710  
 
     
Net increase
    4,156,024  
Net assets available for benefits:
       
Beginning of year
    74,110,087  
 
     
End of year
  $ 78,266,111  
 
     
The accompanying notes are an integral part of this statement.

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Flagstar Bank 401(k) Plan
Notes to Financial Statements
December 31, 2005 and 2004
Note A — Description of Plan
The following description of the Flagstar Bank 401(k) Plan (the “Plan”) provides only general information. Participants should refer to the Plan document for a more complete description of the Plan’s provisions.
General
The Plan is a defined contribution plan covering all employees of Flagstar Bancorp, Inc. (the “Company”) who have met the eligibility service requirements. An employee is eligible to participate in the Plan after three months of service and is age 21 or older. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 (“ERISA”), as amended.
Contributions
Eligible employees may contribute up to 60% in 2005 and 2004 up to the statutory limits ($14,000 in 2005 and $13,000 in 2004) per annum, of their eligible compensation to the Plan. Effective in 2004, participants that meet certain criteria are able to make additional “catch-up” contributions of $4,000 in 2005 and $3,000 in 2004. Participants may also contribute amounts representing distributions from other qualified defined benefit or defined contribution plans. The Company matches employee contributions up to 3% per annum of the employee’s compensation, up to a maximum of $6,300, excluding the catch-up contributions. The Company may make discretionary contributions to the Plan. No discretionary contributions were made in 2005. All contributions are invested in accordance with the participant’s directive.
Vesting
Participants are immediately vested in their voluntary contributions. Vesting in the Company contributions and related earnings is based on years of service. A participant becomes 100% vested in Company contributions after five years of credited service.
Participants Accounts
Each participant’s account is credited with the participant’s contribution, the Company contribution made on the employee’s behalf and an allocation of Plan earnings based on the employee’s account balance. The benefit to which a participant is entitled is the benefit that can be provided from the participant’s vested account.
Participant Loans
Participant loans are permitted by the Plan. Participants may borrow a minimum of $1,000 up to the lesser of $50,000 or 50% of the participant’s vested account balance, reduced by the highest outstanding loan balance in the preceding 12 months. All loans must be repaid in level payments through after-tax payroll deductions over a five-year period or up to 10 years for the purchase of a primary residence. The loans are collateralized by up to 50% of a participant’s account balance and bear interest at rates ranging from 5.00%-10.50%, as determined by the Plan administrator.

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Flagstar Bank 401(k) Plan
Notes to Financial Statements — Continued
December 31, 2005 and 2004
Payment of Benefits
Upon termination of services, retirement, attainment of age 59-1/2, death or disability, the participant or his or her beneficiaries are entitled to receive a distribution based on the vested amount of his or her account. A participant may also receive a distribution of his or her vested account balance in the case of financial hardship subject to the discretion of the Plan’s administrator.
Forfeitures
If a participant terminates employment, any non-vested portion of the participant’s account is forfeited. Forfeitures are applied to reduce the contributions of the Company. Forfeited non-vested accounts totaled $160,000 at December 31, 2005 and $136,000 at December 31, 2004. In 2005, employer contributions were reduced by $499,000 from forfeited non-vested accounts.
Note B — Summary of Accounting Policies
A summary of the significant accounting polices consistently applied in the preparation of the accompanying financial statements follows.
Basis of Accounting
The accompanying financial statements have been prepared using the accrual method of accounting in accordance with accounting principles generally accepted in the United States of America.
Use of Estimates
The preparation of financial statements in conformity with generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and changes there in, and the disclosure of contingent assets and liabilities. Actual results could differ from those estimates.
Investment Valuation and Income Recognition
Investments are stated at fair value based upon the current quoted market prices. Shares of mutual funds are valued at the net asset value of shares held by the Plan at year end. Participant’s loans are valued at their outstanding balances, which approximate fair value. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date.
Payment of Benefits
Benefits are recorded when paid.

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Flagstar Bank 401(k) Plan
Notes to Financial Statements — Continued
December 31, 2005 and 2004
Note C — Investments
The following presents investments that represent 5% or more of the Plan’s net assets.
                 
December 31, 2005   Number of Shares   Fair Value
Flagstar Bancorp, Inc. Common Stock
    859,820     $ 12,381,408  
Fidelity Retirement Government Money Market
    5,207,792       5,207,792  
Mutual Funds
               
Fidelity Growth Company Fund
    134,261       8,543,024  
Fidelity Dividend Growth Fund
    264,514       7,615,354  
Fidelity Mid-Cap Stock Fund
    245,456       6,521,767  
Spartan U.S. Equity Index Fund
    122,668       5,417,011  
Fidelity Diversified International Fund
    163,592       5,323,271  
                 
December 31, 2004   Number of Shares   Fair Value
Flagstar Bancorp, Inc. Common Stock
    805,504     $ 18,204,390  
Fidelity Retirement Government Money Market
    4,984,830       4,984,830  
Mutual Funds
               
Fidelity Growth Company Fund
    141,941       7,958,630  
Fidelity Dividend Growth Fund
    260,731       7,428,229  
Fidelity Mid-Cap Stock Fund
    226,894       5,320,659  
Spartan U.S. Equity Index Fund
    119,162       5,107,286  
Fidelity Diversified International Fund
    143,864       4,120,268  
During 2005, the Plan’s investments (including gains and losses on investments bought and sold, as well as held during the year) depreciated in value by $2,336,700 as follows:
         
Flagstar Bancorp, Inc. Common Stock
    ($5,838,438 )
Mutual funds
    3,501,738  
 
     
Total
    ($2,336,700 )
 
     
Note D — Parties-In-Interest
Certain plan investments are shares of mutual funds managed by Fidelity Management Trust Company. Fidelity Management Trust Company is the trustee as defined by the Plan and, therefore, those transactions qualify as party-in-interest transactions. Pursuant to the Plan agreement, the Company may pay a portion of the administrative expenses of the Plan, at its discretion. Expenses paid to the trustee by the Company amounted to $87,200 and $127,800 in 2005 and 2004, respectively. In addition, the Plan trades in the common stock of the Company.

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Flagstar Bank 401(k) Plan
Notes to Financial Statements — Continued
December 31, 2005 and 2004
Note E — Plan Termination
Although it has not expressed any intent to do so, the Company has the right under the Plan to discontinue its contributions at any time and to terminate the Plan, subject to provisions of ERISA. In the event of termination of the Plan, the assets of the Plan shall be distributed to all participants to the extent of the value of each participant’s account after adjustment for liquidation expenses, which were not paid by the Company. In the event of the Plan termination, participants would become 100% vested in their employer contributions.
Note F — Tax Status
The Internal Revenue Service has determined and informed the Company by a letter dated January 16, 2002, that the Plan and related trusts are designed in accordance with applicable sections of the Internal Revenue Code (IRC). The Plan was amended, subsequent to the application for favorable determination above, however, the Plan administrator believes that the Plan is designed and is currently being operated in compliance with applicable requirements of the IRC.
Note G — Risks and Uncertainties
The Plan provides for various investment options in any combination of equity securities, bonds, fixed income securities and other investments with market and credit risks. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect participants’ account balances and the amounts reported in the statement of net assets available for benefits.
Note H — Amount Owned to Participants Withdrawing from the Plan
The Plan had no liability to participants who had withdrawn from the Plan as of December 31, 2005 and 2004, respectively.
Note I — Reconciliation of Financial Statements to Form 5500
The following is a reconciliation of statements of net assets available for benefits and the statement of changes in net assets available for benefits per the financial statements to the Form 5500.
                 
    December 31,
    2005   2004
     
Net assets per financial statements
  $ 78,266,111     $ 74,110,087  
Refundable contributions
    13,253       138,931  
     
Net assets per Form 5500
  $ 78,279,364     $ 74,249,018  
     
Contributions per financial statements
  $ 12,986,163     $ 12,765,331  
Refundable contributions
    13,253       138,931  
     
Contributions per Form 5500
  $ 12,999,416     $ 12,904,262  
     

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Supplemental Information

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Flagstar Bank 401(k) Plan
Schedule H, line 4i — Schedule of Assets (Held at End of Year)
December 31, 2005
                     
    (b) Identity of issue, borrower,   (c) Description of investment including maturity date,        
(a)   lessor or similar party   rate of interest, collateral, par, or maturity value   (d) Cost   (e) Current value
 
*
  Flagstar Bancorp, Inc.   Common Stock   **   $ 12,381,408  
*
  Fidelity   Retirement Government Money Market   **     5,207,792  
*
  Fidelity   Retirement Money Market Portfolio   **     793,173  
*
  FMTC   Institutional Cash Portfolio   **     972,788  
*
  Fidelity   Managed Income Portfolio   **     20,936  
 
  ABF   Balance Portfolio   **     101  
 
  ABF   Large Cap Value Portfolio   **     15,518  
 
  AIM   Small Company Growth Investment   **     16  
 
  AIM   Blue Chip Fund — Class A   **     659  
 
  AIM   Mid Cap Core Equity Fund — Class A   **     6,765  
 
  AIM   Dynamics Investment Fund   **     16  
 
  AIM   Global Aggressive Growth Class A Fund   **     843  
 
  ALLNZ   CCM Cap Ap Adminstrative Fund   **     1,378  
 
  ALLNZ   CCM Mid Cap Administrative Fund   **     5,965  
 
  ALLNZ   NFJ Small Cap Value Fund — Administrative Class   **     16  
 
  AM   Central Ultra Investment Fund   **     5,312  
 
  Ariel   Appreciation Fund   **     18,688  
 
  Ariel   Fund   **     98,895  
 
  Artisan   International Fund   **     12,013  
 
  Artisan   Mid Cap Value Fund   **     80,757  
 
  Baron   Small Cap Fund   **     27,312  
 
  Baron   Asset Fund   **     59,477  
 
  Calvert   SIF Equity Fund-Class A   **     20  
 
  Calvert   SIF Bond Fund — Class A   **     32  
 
  Calvert   New Vision Small Cap Fund — Class A   **     90  
 
  Col   Consolidated High Yield Z Fund   **     24,359  
 
  Col/Acorn   Select Fund — Class Z   **     58,171  
 
  Credit Suisse   Global Fixed Income Fund — Common Shares   **     12,858  
 
  Credit Suisse   Cap Appreciation Com Fund   **     4,010  
 
  DWS   International S   **     21,940  
 
  DWS   Global Opps S   **     14,510  
 
  DWS   Dividend High Return Equity Class A   **     2,115  
*
  Fidelity   Aggressive International Fund   **     19,407  
*
  Fidelity   Asset Manager Growth Fund   **     4,968  
*
  Fidelity   Disciplined Equity Fund   **     22,708  
*
  Fidelity   Real Estate Investment Portfolio Fund   **     295,149  
*
  Fidelity   Structured Large Cap Growth Fund   **     15,630  
*
  Fidelity   Structured Mid Cap Growth Fund   **     33,711  
*
  Fidelity   Total Bond Fund   **     752,599  
*
  Fidelity   Aggressive Growth Fund   **     25,963  
*
  Fidelity   Balanced Fund   **     97,478  
*
  Fidelity   Blue Chip Growth Fund   **     21,732  

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Flagstar Bank 401(k) Plan
Schedule H, line 4i — Schedule of Assets (Held at End of Year) — Continued
December 31, 2005
                     
    (b) Identity of issue, borrower,   (c) Description of investment including maturity date,        
(a)   lessor or similar party   rate of interest, collateral, par, or maturity value   (d) Cost   (e) Current value
 
*
  Fidelity   Canada Fund   **     209,374  
*
  Fidelity   Capital & Income Fund   **     34,058  
*
  Fidelity   Capital Appreciation Fund   **     52,976  
*
  Fidelity   Dividend Growth Fund   **     7,615,354  
*
  Fidelity   Diversified International Fund   **     5,323,271  
*
  Fidelity   Equity-Income II Fund   **     2,250  
*
  Fidelity   Equity-Income Fund   **     1,630,791  
*
  Fidelity   Europe Fund   **     33,394  
*
  Fidelity   Export and Multinational Fund   **     153,549  
*
  Fidelity   Fifty Fund   **     1,218  
*
  Fidelity   Freedom 2000 Fund   **     337,512  
*
  Fidelity   Freedom 2010 Fund   **     1,050,329  
*
  Fidelity   Freedom 2020 Fund   **     1,196,775  
*
  Fidelity   Freedom 2030 Fund   **     1,437,472  
*
  Fidelity   Freedom 2040 Fund   **     682,679  
*
  Fidelity   Freedom Income Fund   **     256,961  
*
  Fidelity   Ginnie Mae Fund   **     21,392  
*
  Fidelity   Growth Company Fund   **     8,543,024  
*
  Fidelity   Independence Fund   **     1,437,641  
*
  Fidelity   International Discovery Fund   **     122,444  
*
  Fidelity   Japan Fund   **     70,033  
*
  Fidelity   Low-Priced Stock Fund   **     2,966,710  
*
  Fidelity   Mid-Cap Stock Fund   **     6,521,767  
*
  Fidelity   Mortgage Securities Fund   **     1,736  
*
  Fidelity   New Markets Income Fund   **     167,966  
*
  Fidelity   Puritan Fund   **     3,221  
*
  Fidelity   Small Cap Stock Fund   **     50,137  
*
  Fidelity   Small Capital Retirement Fund   **     1,240,029  
*
  Fidelity   Trend Fund   **     8,801  
*
  Fidelity   U.S. Bond Index Fund   **     2,734,440  
*
  Fidelity   Value Fund   **     261,901  
*
  Fidelity   Worldwide Fund   **     109  
*
  Fidelity   Large Cap Stock Fund   **     14,476  
*
  Fidelity   Fidelity Fund   **     345  
*
  Fidelity   Contrafund   **     665,110  
*
  Fidelity   Investment Growth Bond Fund   **     22,868  
*
  Fidelity   Growth and Income Fund   **     10,332  
*
  Fidelity   Government Income Fund   **     1,013  
*
  Fidelity   Overseas Fund   **     16,770  
*
  Fidelity   Leveraged Company Stock Fund   **     608,449  
*
  Fidelity   Pacific Basin Fund   **     11,409  

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Flagstar Bank 401(k) Plan
Schedule H, line 4i — Schedule of Assets (Held at End of Year) — Continued
December 31, 2005
                     
    (b) Identity of issue,            
    borrower,   (c) Description of investment including maturity date,        
(a)   lessor or similar party   rate of interest, collateral, par, or maturity value   (d) Cost   (e) Current value
 
*
  Fidelity   Asset Manager Growth Fund   **     59,061  
*
  Fidelity   Convertible Securities Fund   **     7,891  
*
  Fidelity   Utilities Fund   **     23,226  
*
  Fidelity   Emerging Markets Fund   **     387,937  
*
  Fidelity   Focused Stock Fund   **     1,518  
*
  Fidelity   Global Balanced Fund   **     8,484  
*
  Fidelity   Small Cap Independent Fund   **     8,923  
*
  Fidelity   Latin America Fund   **     338,146  
*
  Fidelity   Southeast Asia Fund   **     32,412  
*
  Fidelity   Strategic Income Fund   **     68,424  
*
  Fidelity   Short Term Bond Fund   **     6,634  
*
  Fidelity   Structured Large Cap Value Fund   **     40,479  
*
  Fidelity   Inflation Prot Bond Fund   **     34,709  
*
  Fidelity   Real Estate Income Fund   **     15,434  
*
  Fidelity   Blue Chip Value Fund   **     6,380  
*
  Fidelity   Mid Cap Value Fund   **     4,484  
*
  Fidelity   Freedom 2005 Fund   **     1,864  
*
  Fidelity   Freedom 2015 Fund   **     115,605  
*
  Fidelity   Freedom 2025 Fund   **     29,440  
*
  Fidelity   Freedom 2035 Fund   **     83,386  
*
  Fidelity   Europe Cap Appreciation Fund   **     7,489  
*
  Fidelity   Growth and Income Fund II   **     328  
*
  Fidelity   Strategic Dividend and Income Fund   **     96  
*
  Fidelity   Small Cap Growth Fund   **     3,114  
*
  Fidelity   Small Cap Value Fund   **     1,094  
*
  Fidelity   Value Strategies Fund   **     19,361  
*
  Fidelity   Intermediate Bond Fund   **     1,028  
 
  FMA   Small Company IS   **     5,451  
 
  Franklin   Small-Mid Cap Growth Fund — Class A   **     758  
 
  Hartford   Growth Y Fund   **     1,097  
 
  Hartford   Small Cap Growth Y   **     837  
 
  LD Abbett   Small Cap Build — Class A   **     24,354  
 
  LM   Value Trust Fidelity Class   **     31,726  
 
  Loomis   Small Cap Value R   **     1,268  
 
  Managers   Bond Fund   **     5,587  
 
  Managers   Value Fund   **     11,062  
 
  Mutual   Discovery Fund — Class A   **     130,065  
 
  Mutual   Shares — Class A   **     6,690  
 
  MSI   Emerging Markets Fund — Class B   **     21,182  
 
  MSIFT   High Yield Advance Fund   **     140  

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Flagstar Bank 401(k) Plan
Schedule H, line 4i — Schedule of Assets (Held at End of Year) — Continued
December 31, 2005
                         
    (b) Identity of issue,   (c) Description of investment including maturity        
    borrower,   date, rate of interest, collateral, par, or maturity value        
(a)   lessor or similar party     (d) Cost   (e) Current value
 
 
  NB   Partners Trust Fund     **       56,796  
 
  NB   Regency Trust Fund     **       1,008  
 
  NB   High Income Bond Investment Fund     **       60  
 
  NB   International Fund Trust     **       854  
 
  The Oakmark   Equity and Income Fund     **       69,670  
 
  The Oakmark   Select I     **       850,045  
 
  The Oakmark   Fund I     **       17,499  
 
  PIM   Global Band AD Unhedged Fund     **       7,491  
 
  PIMCO   High Yield — Administration Class     **       26,740  
 
  PIMCO   Low Duration — Administration Class     **       73  
 
  PIMCO   Long Term Government — Administrative Class     **       14,259  
 
  PIMCO   Real Return Fund — Administrative Class     **       253  
 
  PIMCO   Total Return Fund — Administrative Class     **       86,611  
 
  Rainier   Small Mid Cap Fund     **       31,329  
 
  Royce   Value Plus Investment Fund     **       42,332  
 
  Royce   Opportunity Fidelity Fund     **       4,306  
 
  RS   Emerging Growth Fund     **       3,588  
 
  RS   Partners Fund     **       11,673  
 
  RS   Value Fund     **       8,202  
 
  SB   Aggressive Growth — Class A     **       583  
 
  Spartan   U.S. Equity Index Fund     **       5,417,011  
 
  Spartan   Total Market Index Fund     **       31,911  
 
  Spartan   Extended Market Index     **       58  
 
  TCW   Select Equity N Fund     **       11,575  
 
  Templeton   Foreign Fund — Class A     **       35,573  
 
  Templeton   Foreign Small Company — Class A     **       13,761  
 
  Templeton   Dev Markets Fund — Class A     **       83,037  
 
  Templeton   Growth Fund — Class A     **       26,618  
 
  Templeton   World Fund — Class A     **       11,764  
 
  Templeton   Global Bond Fund — Class A     **       12,403  
 
  Van Kampen   Growth and Income Fund — Class A     **       14,081  
 
  Van Kampen   Equity Income — Class A     **       238  
 
  West   Asset Core Fidelity Fund     **       1,668  
 
  WFA   Small Cap Value — Class Z     **       26,374  
 
  WFA   C&B Mid Cap Value Fund D     **       505  
*
  Participant Loans   Interest rates ranging from 5% to 10.5% with various maturity dates     0       2,723,215  
 
                       
 
                    $77,847,692  
 
                       
 
*   Party-in-interest to the Plan
 
**   Participant Directed

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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.
         
 
  FLAGSTAR BANK 401(k) PLAN    
 
       
 
  FLAGSTAR BANCORP, INC.    
 
       
June 26, 2006
  By: /s/ Mary Kay Ruedisueli    
 
       
 
       
 
         Mary Kay Ruedisueli    
 
         Secretary of Flagstar Bancorp, Inc.,    
 
         Plan Administrator    

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EXHIBIT INDEX
             
Exhibit No.   Description   Page No.
 
23
  Consent of Virchow, Krause & Company, LLP     18  
23.1
  Consent of Grant Thornton LLP     19  

17