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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
 Washington, D.C. 20549
 FORM 11-K
 þ
    
    ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934
 For the fiscal year ended: December 31, 2010
 o
    
    TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
EXCHANGE ACT OF 1934
 For the transition period from _______ to _______
 Commission file Number 1-12804
 MOBILE MINI, INC. PROFIT SHARING PLAN AND TRUST
  MOBILE MINI, INC.




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PageReport of Independent Registered Public Accounting Firm
    
    
    1Statements of Net Assets Available for Benefits as of December 31, 2010 and 2009
    
    
    2Statement of Changes in Net Assets Available for Benefits for the Year Ended December 31, 2010
    
    
    3Notes to Financial Statements
    
    
    4Supplemental Schedules*
    
    
    14Schedule H, line 4(a); Schedule of Delinquent Participant Contributions for the Year Ended December 31, 2010
    
    
    15Schedule H, line 4(i); Schedule of Assets (Held at End of Year) as of December 31, 2010
    
    
    16Signatures
    
    
    17ExhibitsExhibit 23
  *
    
    Other Schedules required by the Department of Labors Rules and Regulations for Reporting and
Disclosure under the Employee Retirement Income Security Act of 1974 have been omitted because
they are not applicable.




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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
  MOBILE MINI, INC. PROFIT SHARING PLAN AND TRUST
     
  1




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2010
    
    
    2009Assets:Investments at fair value
    
    $
    10,028,058
    
    
    $
    9,654,995Notes receivable from participants
    
    
    374,404
    
    
    
    450,108Investments sold receivable
    
    
    37,110
    
    
    
    Total assets
    
    
    10,439,572
    
    
    
    10,105,103Liabilities:Excess employee deferrals
    
    
    (8,123
    )
    
    
    (131,476
    )Net assets reflecting investments at fair value
    
    
    10,431,449
    
    
    
    9,973,627Adjustment from fair value to contract value for
fully benefit-responsive investment contracts
    
    
    (48,110
    )
    
    
    (31,566
    )Net assets available for benefits
    
    $
    10,383,339
    
    
    $
    9,942,061
   2




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Additions to net assets attributed to:Contributions:Participant
    
    $
    908,165Rollover
    
    
    7,658Total contributions
    
    
    915,823Interest income on notes receivable from participants
    
    
    18,591Investment income:Net appreciation in fair value of investments
    
    
    1,261,561Interest and dividends
    
    
    90,172Total investment income
    
    
    1,351,733Total additions
    
    
    2,286,147Deductions from net assets attributed to:Benefits paid to participants
    
    
    1,839,628Administrative fees
    
    
    5,241Total deductions
    
    
    1,844,869Net increase in net assets available for benefits
    
    
    441,278Net assets available for benefits:Beginning of year
    
    
    9,942,061End of year
    
    $
    10,383,339
   3




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Note 1  Plan Description
  General
  Trustee
 Eligibility
 Contributions
  4




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Note 1  Plan Description (continued)
 Participant Accounts
  INVESCO Stable Value Fund
 American Balanced Fund
 EuroPacific Growth Fund
 Investment Company of America Fund
 Growth Fund of America
 Allianz Renaissance Fund
 Oppenheimer Small Cap Value Fund
 Bond Fund of America
 Mobile Mini, Inc. Common Stock Fund
 Vesting
 Administration
  5




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Note 1  Plan Description (continued)
 Distributions
 Notes Receivable from Participants
 Amendment and Termination of the Plan
 Note 2  Significant Accounting Policies
 Method of Presentation
  6




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Note 2  Significant Accounting Policies (continued)
 Risks and Uncertainties
 Concentration of Credit Risk
 Investment Valuation
   Net Appreciation (Depreciation) in Fair Value
 Benefits
  7




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Note 2  Significant Accounting Policies (continued)
 New Accounting Pronouncements
 Notes Receivable from Participants
 Note 3  Fair Value Measurements
 Fair Value Measurement and Disclosures
 Level 1
    
    Inputs to the valuation methodology are unadjusted quoted prices
for identical assets or liabilities in active markets that the
Plan has the ability to access.Level 2
    
    Inputs to the valuation methodology include quoted prices for
similar assets and 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; inputs that are derived principally from
or collaborated by observable market data by correlation or other
means. If the asset or liability has a specified (contractual)
term, the level 2 input must be observable for substantially the
full term of the asset or liability.Level 3
    
    Inputs to the valuation methodology are unobservable and
significant to the fair value measurement.
   8




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Note 3  Fair Value Measurements (continued)
  Common stock:
    
    Valued at the closing price reported on the active market on which the individual
securities are traded.Mutual Funds:
    
    Valued at the net asset value (NAV) of shares held by the Plan at year end.Collective trust:
    
    Valued at fair value based on the change in present value of the contracts
replacement cost.
   9




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Note 3  Fair Value Measurements (continued)
  Investments at Fair Value as of December 31, 2010Level 1
    
    
    Level 2
    
    
    Level 3
    
    
    TotalCommon stock:Mobile Mini, Inc.
Common Stock Fund
    
    $
    2,425,062
    
    
    $
    
    
    
    $
    
    
    
    $
    2,425,062Mutual funds:Growth funds
    
    
    3,613,781
    
    
    
    
    
    
    
    
    
    
    
    3,613,781Growth and income funds
    
    
    1,390,145
    
    
    
    
    
    
    
    
    
    
    
    1,390,145Balanced funds
    
    
    662,367
    
    
    
    
    
    
    
    
    
    
    
    662,367Bond funds
    
    
    225,148
    
    
    
    
    
    
    
    
    
    
    
    225,148Total mutual funds
    
    
    5,891,441
    
    
    
    
    
    
    
    
    
    
    
    5,891,441Collective trust
    
    
    
    
    
    
    1,711,555
    
    
    
    
    
    
    
    1,711,555Total investments at fair value
    
    $
    8,316,503
    
    
    $
    1,711,555
    
    
    $
    
    
    
    $
    10,028,058
 Investments at Fair Value as of December 31, 2009Level 1
    
    
    Level 2
    
    
    Level 3
    
    
    TotalCommon stock:Mobile Mini, Inc.
Common Stock Fund
    
    $
    2,153,240
    
    
    $
    
    
    
    $
    
    
    
    $
    2,153,240Mutual funds:Growth funds
    
    
    3,628,738
    
    
    
    
    
    
    
    
    
    
    
    3,628,738Growth and income funds
    
    
    1,395,306
    
    
    
    
    
    
    
    
    
    
    
    1,395,306Balanced funds
    
    
    615,379
    
    
    
    
    
    
    
    
    
    
    
    615,379Bond funds
    
    
    209,567
    
    
    
    
    
    
    
    
    
    
    
    209,567Total mutual funds
    
    
    5,848,990
    
    
    
    
    
    
    
    
    
    
    
    5,848,990Collective trust
    
    
    
    
    
    
    1,652,765
    
    
    
    
    
    
    
    1,652,765Total investments at fair value
    
    $
    8,002,230
    
    
    $
    1,652,765
    
    
    $
    
    
    
    $
    9,654,995
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Note 4  Investments
  2010
    
    
    2009INVESCO Stable Value Fund
    
    $
    1,711,555
    *
    
    $
    1,652,765
    *American Balanced Fund
    
    
    662,367
    *
    
    
    615,379
    *EuroPacific Growth Fund
    
    
    1,363,946
    *
    
    
    1,433,666
    *Investment Company of America Fund
    
    
    1,390,145
    *
    
    
    1,395,306
    *Growth Fund of America
    
    
    1,623,661
    *
    
    
    1,685,913
    *Allianz Renaissance Fund
    
    
    241,542
    
    
    
    195,046Oppenheimer Small Cap Value Fund
    
    
    384,632
    
    
    
    314,113Bond Fund of America
    
    
    225,148
    
    
    
    209,5677,602,996
    
    
    
    7,501,755Mobile Mini, Inc. Common Stock Fund:Participant-directed
    
    
    1,792,178
    
    
    
    1,554,832Non-participant-directed
    
    
    632,884
    
    
    
    598,408Total Mobile Mini, Inc. Common Stock Fund
    
    
    2,425,062
    *
    
    
    2,153,240
    *$
    10,028,058
    
    
    $
    9,654,995
 *
    
    - Represents 5% or more of investments in the Plans net assets at the indicated date.  2010Mobile Mini, Inc. Common Stock Fund
    
    $
    736,161Mutual Funds
    
    
    525,400$
    1,261,561
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Note 4  Investments (continued)
  Note 5  Non-participant-directed Investments
  2010Changes in non-participant-directed net assets:Investment income
    
    $
    224,724Benefits paid
    
    
    (131,788
    )Transfers to participant-directed investments
    
    
    (58,460
    )Increase in net assets
    
    
    34,476Net assets invested in Mobile Mini, Inc. Common Stock Fund:Beginning of year
    
    
    598,408End of year
    
    $
    632,884
 .
 Note 6  Excess Employee Deferrals
   12




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Note 7  Tax Status of the Plan
  Note 8  Parties in Interest
  Note 9  Delinquent participant contributions
  Note 10  Subsequent Events
   13




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Total FullyCorrectedUnderVoluntaryFiduciaryCorrectionTable that Constitute Nonexempt Prohibited
    
    
    ProgramParticipant
    
    
    Check Here if
    
    Transactions
    
    
    (VFCP)Contributions
    
    
    Late Participant
    
    
    
    
    
    Contributions
    
    
    Contribution
    
    
    and ProhibitedTransferred
    
    
    Loan
    
    Contributions
    
    
    Corrected
    
    
    Pending
    
    
    TransactionLate
    
    
    Repayments are
    
    not
    
    
    Outside
    
    
    Correction in
    
    
    Exemptionto the Plan
    
    
    Included:
    
    Corrected
    
    
    VFCP
    
    
    VFCP
    
    
    2002-51$
    1,500
    
    
    
    
    $
    1,500
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(c) Description of Investment,(b) Identity of Issue,
    
    Including Maturity Date,Borrower, Lessor,
    
    Interest Rate, Collateral,
    
    
    
    
    
    (e) Current(a)
    
    or Similar Party
    
    Par or Maturity Value
    
    (d) Cost
    
    
    Value*
    
    INVESCO
    
    INVESCO Stable Value Fund
    
    $
    ***
    
    
    $
    1,711,555*
    
    American Funds
    
    American Balanced Fund
    
    
    ***
    
    
    
    662,367*
    
    American Funds
    
    EuroPacific Growth Fund
    
    
    ***
    
    
    
    1,363,946*
    
    American Funds
    
    Investment Company of America Fund
    
    
    ***
    
    
    
    1,390,145*
    
    American Funds
    
    Growth Fund of America
    
    
    ***
    
    
    
    1,623,661*
    
    Allianz
    
    Allianz Renaissance Fund
    
    
    ***
    
    
    
    241,542*
    
    Oppenheimer
    
    Oppenheimer Small Cap Value Fund
    
    
    ***
    
    
    
    384,632*
    
    American Funds
    
    Bond Fund of America
    
    
    ***
    
    
    
    225,148**
    
    Mobile Mini, Inc.
    
    Common stock of plan sponsor
    
    
    1,658,185
    
    
    
    2,425,062Notes receivable from
    
    Various rates of interest ranging fromparticipants
    
    4.25% to 9.25%, maturity
dates through March 2025, and
collateralized by the
participants account balance.
    
    
    -0-
    
    
    
    374,404$
    10,402,462
 *
    
    - Indicates a party-in-interest to the Plan for which statutory exemptions exist.**
    
    - Investment qualifies as a party-in-interest to the Plan.***
    
    - Investments are participant directed, therefore disclosure of cost is not required.   16




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The Plan
 MOBILE MINI, INC. PROFIT SHARING PLAN AND TRUSTJune 24, 2011
    By:
    /s/ Mark E. FunkMark E. FunkExecutive Vice President,
Chief Financial Officer of Mobile Mini, Inc.  17