- --------------------------------------------------------------------------------

                    U. S. SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                     --------------------------------------

                                    Form 10-Q
     (Mark One)
     |X| QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
                              EXCHANGE ACT OF 1934

                  For the quarterly period ended March 31, 1998

     |_| TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES 
                              EXCHANGE ACT OF 1934

             For the transition period from __________ to __________

                       -----------------------------------
                         Commission File Number 1-12804
                       -----------------------------------

                                mobile mini, inc.
              (Exact name of registrant as specific in its charter)

          Delaware                                        86-0748362
(State or other jurisdiction of                (IRS Employer Identification No.)
incorporation or organization)

                              1834 West 3rd Street
                              Tempe, Arizona 85281
                    (Address of principal executive offices)

                                 (602) 894-6311
              (Registrant's telephone number, including area code)

         Indicate  by check  whether  the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.

Yes     X                 No            ,
   -----------              -----------

         As of May 12,  1998,  there were  outstanding  7,863,858  shares of the
issuer's common stock, par value $.01.


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                                       1

                                MOBILE MINI, INC.
                            INDEX TO FORM 10-Q FILING
                      FOR THE QUARTER ENDED MARCH 31, 1998


                                TABLE OF CONTENTS                          PAGE
                                                                          NUMBER

                                     PART I.
                              FINANCIAL INFORMATION

Item 1.  Financial Statements

         Consolidated Balance Sheets                                          3
              March 31, 1998 (unaudited) and December 31, 1997

         Consolidated Statements of Operations                                4
              Three Months ended March 31, 1998 and March 31, 1997
              (unaudited)

         Consolidated Statements of Cash Flows                                5
              Three Months Ended March 31, 1998 and March 31, 1997
              (unaudited)

         Notes to Consolidated Financial Statements                           6

Item 2.  Management's Discussion and Analysis of Financial Condition 
              and Results of Operations                                       8

                                    PART II.
                                OTHER INFORMATION

Item 6   Exhibits and Reports on Form 8-K                                    11

                                   SIGNATURES                                12































                                       2

                          PART I. FINANCIAL INFORMATION

ITEM 1.     FINANCIAL STATEMENTS

                                MOBILE MINI, INC.
                           CONSOLIDATED BALANCE SHEETS



                          ASSETS                             March 31, 1998  December 31,
                                                               (Unaudited)       1997
                                                             --------------  ------------
                                                                               
CASH AND CASH EQUIVALENTS                                      $   452,459   $ 1,005,204
RECEIVABLES, net of allowance for doubtful accounts
  of $987,000 and $893,000, respectively                         6,519,962     6,259,476
INVENTORIES                                                      7,023,716     4,748,316
CONTAINER LEASE FLEET, net                                      55,179,126    50,906,908
PROPERTY PLANT AND EQUIPMENT, net                               18,041,479    18,011,916
DEPOSITS AND PREPAID EXPENSES                                      831,491       898,615
OTHER ASSETS                                                     2,748,296     2,221,587
                                                               -----------   -----------
                Total assets                                   $90,796,529   $84,052,022
                                                               ===========   ===========

            LIABILITIES AND STOCKHOLDERS' EQUITY

LIABILITIES:
ACCOUNTS PAYABLE                                               $ 3,015,151   $ 2,676,634
ACCRUED LIABILITIES                                              3,551,508     3,104,747
LINE OF CREDIT                                                  36,114,170    35,883,104
NOTES PAYABLE                                                    5,647,035     6,123,049
OBLIGATIONS UNDER CAPITAL LEASES                                 5,031,561     5,371,603
SUBORDINATED NOTES, net                                          6,660,915     6,647,874
DEFERRED INCOME TAXES                                            5,552,667     5,217,619
                                                               -----------   -----------
                Total liabilities                               65,573,007    65,024,630
                                                               -----------   -----------

STOCKHOLDERS' EQUITY:
  Common stock; $.01 par value, 17,000,000 shares
    authorized, 7,845,736 and 6,799,524 issued and
    outstanding at March 31, 1998 and December 31,
    1997, respectively                                              78,457        67,995
  Additional paid-in capital                                    21,358,657    16,206,166
  Common stock to be issued, 85,468 shares                         500,000          --
  Retained earnings                                              3,286,408     2,753,231
                                                               -----------   -----------
                  Total stockholders' equity                    25,223,522    19,027,392
                                                               -----------   -----------
                  Total liabilities and stockholders' equity   $90,796,529   $84,052,022
                                                               ===========   ===========


        See the accompanying notes to these consolidated balance sheets.
                                       3


                                MOBILE MINI, INC.
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                                   (UNAUDITED)

                                                   Three Months Ended March 31,
                                                   ----------------------------

                                                      1998             1997
                                                  ------------     ------------
REVENUES:
  Leasing                                         $  7,512,912     $  4,995,110
  Container and other sales                          3,128,400        4,542,631
  Other                                                104,911          111,715
                                                  ------------     ------------
                                                    10,746,223        9,649,456

COSTS AND EXPENSES:
  Cost of container and other sales                  2,147,577        3,445,770
  Leasing, selling and general expenses              5,564,381        4,281,350
  Depreciation and amortization                        666,771          472,167
                                                  ------------     ------------
INCOME FROM OPERATIONS                               2,367,494        1,450,169

OTHER INCOME (EXPENSE):
  Interest income                                       11,287             --
  Interest expense                                  (1,490,152)      (1,089,879)
                                                  ------------     ------------
INCOME BEFORE PROVISION FOR INCOME TAXES               888,629          360,290

PROVISION FOR INCOME TAXES                             355,452          158,528
                                                  ------------     ------------

NET INCOME AVAILABLE FOR COMMON STOCK             $    533,177     $    201,762
                                                  ============     ============


EARNINGS PER SHARE:
BASIC:
  Net income                                      $       0.07     $       0.03
                                                  ============     ============


WEIGHTED AVERAGE NUMBER OF COMMON
  SHARES OUTSTANDING                                 7,440,628        6,739,324

                                                  ============     ============

DILUTED:
  Net income                                      $       0.07     $       0.03
                                                  ============     ============

WEIGHTED AVERAGE NUMBER OF COMMON AND
  COMMON SHARE EQUIVALENTS OUTSTANDING               7,971,804        6,739,403
                                                  ============     ============

           See the accompanying notes to these consolidated statements
                                        4


                                MOBILE MINI, INC.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (UNAUDITED)



                                                                Three Months Ended March 31,
                                                                ----------------------------

                                                                     1998           1997
                                                                 -----------    -----------
                                                                                  
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income                                                       $   533,177    $   201,762
Adjustments to reconcile income to net cash used in
  operating activities:
     Reserve for doubtful accounts receivable                        257,430        205,066
     Amortization of deferred loan costs                             178,343        122,941
     Amortization of warrants issuance discount                       13,041           --
     Depreciation and amortization                                   666,771        472,167
     Gain on disposal of property, plant and equipment                (3,541)          --
     Deferred income taxes                                           335,048        158,475
     Changes in certain assets and liabilities:
       Increase in receivables                                      (517,916)      (218,096)
       Increase in inventories                                    (2,275,400)    (1,815,657)
       Decrease in deposits and prepaids                              67,124        188,259
       (Increase) decrease in other assets                          (205,052)        17,399
       Increase in accounts payable                                  338,517        605,782
       Increase (decrease) in accrued liabilities                    446,761       (161,835)
                                                                 -----------    -----------

       Net cash used in operating activities                        (165,697)      (223,737)
                                                                 -----------    -----------

CASH FLOWS FROM INVESTING ACTIVITIES:
  Net purchases of container lease fleet                          (4,476,082)    (1,741,236)
  Net purchases of property, plant, and equipment                   (488,929)    (1,097,151)
                                                                 -----------    -----------

       Net cash used in investing activities                      (4,965,011)    (2,838,387)
                                                                 -----------    -----------

CASH FLOWS FROM FINANCING ACTIVITIES:
  Net borrowings under lines of credit                               231,066      3,666,477
  Principal payments on notes payable                               (476,014)      (384,769)
  Principal payments on capital lease obligations                   (340,042)      (325,269)
  Exercise of warrants                                             5,162,953           --
                                                                 -----------    -----------

       Net cash provided by financing activities                   4,577,963      2,956,439
                                                                 -----------    -----------

NET DECREASE IN CASH                                                (552,745)      (105,685)

CASH AND CASH EQUIVALENTS AT BEGINNING
  OF PERIOD                                                        1,005,204        736,543
                                                                 -----------    -----------

CASH AND CASH EQUIVALENTS AT END OF
  PERIOD                                                         $   452,459    $   630,858
                                                                 ===========    ===========


          See the accompanying notes to these consolidated statements.
                                        5

MOBILE MINI, INC. AND SUBSIDIARIES - NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


NOTE A - The accompanying  unaudited consolidated financial statements have been
prepared in accordance with generally accepted accounting principles for interim
financial  information and the instructions to Form 10-Q.  Accordingly,  they do
not include all the  information  and footnotes  required by generally  accepted
accounting  principles  for  complete  financial  statements.  In the opinion of
management,  all adjustments  (which include only normal recurring  adjustments)
necessary to present fairly the financial position,  results of operations,  and
cash flows for all periods  presented  have been made. The results of operations
for the three month period ended March 31, 1998 are not  necessarily  indicative
of the  operating  results  that may be  expected  for the  entire  year  ending
December 31, 1998. These financial statements should be read in conjunction with
the Company's  December 31, 1997  financial  statements and  accompanying  notes
thereto.


Certain  amounts in the 1997  financial  statements  have been  reclassified  to
conform with the 1998 financial statement presentation.


NOTE B - The Company adopted SFAS No. 128, Earnings per Share in 1997.  Pursuant
to SFAS No. 128,  basic  earnings  per common share are computed by dividing net
income by the  weighted  average  number of shares of common  stock  outstanding
during the year. Diluted earnings per common share are determined  assuming that
options were exercised at the beginning of each year or at the time of issuance.
SFAS No. 128 is effective  for  financial  statements  for both interim  periods
presented and as a result,  all prior period  earnings per share data  presented
has been restated.


NOTE C - The Company's  outstanding  Common Stock Purchase  Warrants,  issued in
connection with the Company's  initial public offering,  expired on February 17,
1998.  Prior to their  expiration,  1,046,212  of the  1,067,500  warrants  were
exercised, generating approximately $5.2 million in cash.


NOTE D - In January  1998,  the Company  acquired  the assets of Nevada  Storage
Containers,  a Las Vegas, Nevada based container leasing and sales business, for
approximately  $1.4  million  in cash and  approximately  85,000  shares  of the
Company's  common stock valued at $500,000.  Under the purchase  agreement,  the
shares of common stock will not be issued until one year from the closing date.


NOTE E - In April  1998,  the  Company  acquired  the  assets  of Aspen  Instant
Storage,  a company  engaged in  container  leasing and sales in Oklahoma  City,
Oklahoma.   The  purchase   price  was   approximately   $540,000  in  cash  and
approximately 18,000 shares of the Company's common stock valued at $184,000.


In April  1998,  the  Company  also  opened a new  leasing  and sales  branch in
Albuquerque,  New Mexico.  With this new  location,  the Company now operates 11
leasing  and  sales  offices  in  6  states,  in  addition  to  its  dealer  and
telecommunication divisions and its manufacturing facility.
                                       6

NOTE F - Inventories are stated at the lower of cost or market,  with cost being
determined  under the  specific  identification  method.  Market is the lower of
replacement cost or net realizable value. Inventories consisted of the following
at:
                                             March 31, 1998    December 31, 1997
                                             --------------    -----------------
     
     Raw material and supplies                 $5,449,314         $3,241,962
     Work-in-process                              832,283            631,399
     Finished containers                          742,118            874,955
                                               ----------         ----------
                                               $7,023,716         $4,748,316
                                               ==========         ==========


NOTE G - Property, plant and equipment consisted of the following at:

                                            March 31, 1998     December 31, 1997
                                            --------------     -----------------
     
     Land                                    $    708,555        $    708,555
     Vehicles and equipment                    13,040,084          12,721,917
     Buildings and improvements                 6,835,678           6,739,190
     Office fixtures and equipment              3,182,789           3,109,904
                                             ------------        ------------
                                               23,767,106          23,279,566
     Less accumulated depreciation             (5,725,627)         (5,267,650)
                                             ------------        ------------
                                             $ 18,041,480        $ 18,011,916
                                             ============        ============


NOTE H - The Company maintains a container lease fleet consisting of refurbished
or manufactured storage containers and office units that are leased to customers
with varying terms. Depreciation is provided using the straight-line method with
an  estimated  useful life of 20 years and a salvage  value  estimated at 70% of
cost. In management's  opinion,  estimated  salvage values do not cause carrying
values to exceed net realizable  value.  Normal  repairs and  maintenance to the
lease fleet are expensed as incurred.  As of March 31, 1998, the Company's lease
fleet,  net of  depreciation,  was $55.2 million as compared to $50.9 million at
December 31, 1997. A portion of this increase reflects the acquisition of Nevada
Storage Container's container lease fleet.


NOTE I - The Company has adapted  FASB No. 130  Reporting  Comprehensive  Income
effective January 1, 1998. The Company,  however, has not incurred  transactions
that are within the definitions of  "Comprehensive  Income" and accordingly,  is
not required to make  additional  disclosures on the  accompanying  consolidated
financial  statements for the current year or for the same period represented in
the prior year.
                                       7

ITEM 2. MANAGEMENT'S  DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
                                 OF OPERATIONS


RESULTS OF OPERATIONS


                  Three Months Ended March 31, 1998 Compared to
                        Three Months Ended March 31, 1997


         Revenues for the quarter ended March 31, 1998 were  $10,746,000,  which
represents an 11.4%  increase over revenues of $9,649,000  for the quarter ended
March  31,  1997.  The  Company  has  transitioned  from  primarily  a seller of
containers  and  other  structures,  to  primarily  a lessor of  containers  and
portable  offices.  A change in the  composition  of the Company's  revenues and
expense have occurred as the Company has continued to expand and concentrate its
efforts on leasing operations  generating higher operating margins.  This change
has  resulted in a deferral of the  recognition  of revenues  and  corresponding
container costs. As such, income from operations as a percentage of revenues has
increased 7.0% over the same period of the prior year. Revenues from the leasing
of portable storage  containers and office units increased 50.4%, while revenues
from the sales of the Company's  products decreased 31.1%. The increase in lease
revenues  resulted  from an 8.4%  increase  in the  average  per unit  container
revenue and a 38.7% increase in the average  number of containers on lease.  The
decrease of container  sales  primarily  reflects the emphasis on leasing rather
than selling  containers,  the Company's  discontinuance of its modular building
operations,  which  provided  revenues of $491,000  during the first  quarter of
1997,  and lower sales levels in the Company's  dealer  division.  The Company's
other revenues,  primarily  related to trucking  services  associated with sales
operations,  remained relatively  constant,  decreasing by $7,000 as compared to
the quarter ended March 31, 1997.

         Cost of  container  and other sales as a percentage  of  container  and
other sales for the quarter ended March 31, 1998 was 68.6% compared to 75.9% for
the same quarter in 1997. This decrease resulted from the discontinuation of the
low-margin  modular  building  business and from an increase in container  sales
prices.

                  
         Leasing,  selling  and  general  expenses  increased  by 30.0%  for the
quarter  ended March 31, 1998 as compared to the quarter  ended March 31,  1997.
This  increase  resulted  from  increased  expenses  associated  with the  50.4%
increase in lease revenues and from additional administrative costs and staffing
needs to sustain growth levels.


         Interest  expense  increased by 36.7% during the first  quarter of 1998
compared to the prior year. This resulted from the growth in the Company's lease
fleet and the related  borrowings  to finance  that growth,  and interest  costs
related to the  Company's  subordinated  debt which was issued during the latter
part of 1997.


         Depreciation and  amortization  increased by 41.2% for the three months
ended March 31, 1998 as compared to the prior year period.  This  resulted  from
the increase in the  Company's  lease fleet and the  acquisition  of  additional
equipment at the Company's  various  locations to support  growth in the size of
the lease fleet.


         The  Company  posted a 164.3%  increase in net income to  $533,000,  or
$0.07 per share  diluted  for the quarter  ended March 31, 1998  compared to net
income of  $202,000  or $0.03 per share  diluted  during the same  period in the
prior year. This increase is primarily a result of a 50.4% increase in container
leasing  revenues,  which  produce  higher net  margins  than  container  sales,
partially offset by higher administrative expenses and increased interest costs.
The  Company's  effective tax rate was reduced to 40% at March 31, 1998 from 44%
at March 31, 1997.
                                       8

LIQUIDITY AND CAPITAL RESOURCES


         The Company  plans to continue  to increase  the size of its  container
lease fleet and related property,  plant and equipment.  The recent acquisitions
of Nevada  Storage  Containers  and Aspen Instant  Storage and the growth in the
container  lease fleet and related  property,  plant and equipment was primarily
funded  through  the  Company's  revolving  line of  credit,  under  its  Credit
Agreement dated March 28, 1996 with BT Commercial Corp., as agent for a group of
lenders (the "Senior Credit Agreement") which permitted  borrowings based on the
level of the Company's  inventories,  receivables  and the size of its container
lease  fleet.  The $5.2  million  of cash  generated  from the  exercise  of the
Company's  Common Stock Purchase  Warrants was used to reduce the line of credit
thereby making these funds available to finance this growth.


         On May 12, 1998,  the Company and its lenders  amended the terms of the
Senior Credit  Agreement.  The revolving  line of credit was increased  from $40
million to $60 million, principal amortization on the $6 million term loan under
the Senior Credit Agreement was reduced, the term of the Senior Credit Agreement
was extended for an additional two years, and the interest rate was reduced. The
interest rate is now determined quarterly based on the Company's ratio of funded
debt to earnings before interest, taxes, depreciation and amortization (EBITDA).
The interest rate was initially  adjusted from 3% to 1.75% above the  Eurodollar
rate based upon the  Company's  leverage  ratio at the time the amendment to the
Senior Credit Agreement became effective.


         As of March  31,  1998,  the  Company  had  borrowings  outstanding  of
$36,114,000  under the  revolving  line of credit and  $3,886,000  of additional
borrowing  was available  under that line.  As of May 12, 1998,  the Company had
borrowings  outstanding  of $38,335,000  and $9,476,000 of additional  borrowing
availability under the Senior Credit Agreement, as amended.


         During the three months ended March 31, 1998, the Company's  operations
used cash of $166,000.  This reflects an increase in inventories and receivables
relating to the growth of the Company's  container leasing  business,  partially
offset by an increase in accounts payables and accrued liabilities.


         The Company invested  $4,965,000 in its container lease fleet and other
equipment  during the three months ended March 31, 1998.  This amount  primarily
reflects $519,000 of sales from the container lease fleet.


         Cash flow provided by financing  activities  totaled $4,578,000 for the
three  months  ended  March  31,  1998.  The  primary  source of  financing  was
approximately  $5,200,000  received  upon the  exercise  of warrants to purchase
1,046,212  shares of the  Company's  common stock prior to their  expiration  on
February 17, 1998.  The warrant  proceeds were used to reduce the line of credit
and to fund the increase in the container lease fleet,  related property,  plant
and  equipment,   inventory  levels,  and  the  acquisition  of  Nevada  Storage
Containers.  Cash  flow  from  financing  activities  was  partially  offset  by
principal payments on notes payable and capitalized leases.


         The Company believes that its available  resource will be sufficient to
maintain its current level of operations  and permit  continued  growth over the
next 12 months.  The Company expects to use a wide variety of financing  sources
to fund its future  growth,  including  public and private debt and equity,  and
secured or  unsecured  bank  financing,  among  other  sources.  There can be no
assurances that financing from such sources will be available in the future,  or
if available that such  financing  will be available on terms  acceptable to the
Company.
                                       9

EFFECTS OF INFLATION


         The results of operations of the Company for the periods discussed have
not been significantly affected by inflation.


FACTORS THAT MAY AFFECT FUTURE OPERATING  RESULTS,  AND "SAFE HARBOR"  STATEMENT
UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995


         Statements  in this  Report  which  include  such  words as  "believe",
"intends"  or  "anticipates",  such as the  statement  regarding  the  Company's
ability to meet its obligations and capital needs during the next 12 months, are
forward-looking  statements. The occurrence of one or more unanticipated events,
however, including a decrease in cash flow generated from operations, a material
increase in the borrowing rates under the Senior Credit  Agreement  (which rates
are  based on the prime  rate or the  Eurodollar  rates in  effect  from time to
time),  a material  increase or decrease in  prevailing  market  prices for used
containers,  or a change in general economic  conditions  resulting in decreased
demand  for the  Company's  products,  could  cause  actual  results  to  differ
materially from  anticipated  results and have a material  adverse effect on the
Company's  ability to meet its obligations  and capital needs,  and cause future
operating  results and other events not to occur as presently  anticipated.  The
Company issued $6.9 million of senior  subordinated  notes in October 1997, in a
public  offering  pursuant  to  a  Registration  Statement.   That  Registration
Statement and the Prospectus,  dated October 8, 1997, which is a part of it (the
"Prospectus"),  include a  section  entitled  "Risk  Factors",  which  describes
certain factors that may affect future  operating  results of the Company.  That
section is hereby incorporated by reference in this Report. Those factors should
be considered  carefully in  evaluating  an  investment in the Company's  Common
Stock.  If you do not  have a copy  of the  Prospectus,  you may  obtain  one by
requesting it from the Company's Investor Relations Department at (602) 894-6311
or by mail at Mobile Mini, Inc., 1834 West Third Street,  Tempe,  Arizona 85281.
The  Company's  filings with the SEC may be accessed at the SEC's World Wide Web
site at http://www.sec.gov.
                                       10

                           PART II. OTHER INFORMATION

ITEM 6.           EXHIBITS AND REPORTS ON FORM 8-K

(a)               Exhibits

Number                             Description

10.5.5             Amendment No. 5 to Senior Credit Agreement
                           dated as of March 31, 1998,                 
                          by and among the Registrant,                 
                  each financial institution a party thereto,          
                     and BT Commercial Corporation, as Agent           
                                                             
  11                Computation of Earnings per Share for the          
                            Three Month Period ended                   
                             March 31, 1998 and 1997                   
                                                             
  27                         Selected Financial Data                   

(b)               Reports on Form 8-K:  none
                                       11

                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  Registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                          MOBILE MINI, INC.
                                          (Registrant)



Dated:  May 15, 1998                      /s/ Larry Trachtenberg
                                          ------------------------------
                                             Larry Trachtenberg
                                             Chief Financial Officer &
                                             Executive Vice President
                                       12