<PAGE>

                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM 10-Q

           [X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                       For the quarter ended June 30, 2003

                                       OR

          [ ] 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: 0-13403

                               AMISTAR CORPORATION
             (Exact name of registrant as specified in its charter)

                    CALIFORNIA                               95-2747332
         (State or other jurisdiction of                   (IRS Employer
          incorporation or organization)                Identification No.)

                237 Via Vera Cruz
              San Marcos, California                           92069
     (Address of principal executive offices)                (Zip code)

                                 (760) 471 -1700
              (Registrant's telephone number, including area code)


Indicate by check mark 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 last 90 days.

     Yes [X]    No [  ]


Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2 of the Exchange Act)

     Yes [  ]    No [X]


There were 3,078,294 shares of common stock outstanding as of July 14, 2003.


<PAGE>

                               AMISTAR CORPORATION
                                    FORM 10-Q
                                TABLE OF CONTENTS


PART I  FINANCIAL INFORMATION
Item 1.  Financial Statements:
            Unaudited Condensed Balance Sheets............................... 3
            Unaudited Condensed Statements of Operations..................... 4
            Unaudited Statements of Cash Flows............................... 5
            Notes to the Unaudited Condensed Financial Statements ........... 6
Item 2.  Management's Discussion and Analysis of Financial Condition
           and Results of Operations.........................................13
Item 3.  Quantitative and Qualitative Disclosures about Market Risk..........17
Item 4.  Controls and Procedures.............................................17

PART II  OTHER INFORMATION
Item 4.  Submission of Matters to a Vote of Security Holders.................18
Item 6.  Exhibits and Reports on Form 8-K....................................19

                                       2

<PAGE>

Part I
ITEM 1. FINANCIAL STATEMENTS

                               AMISTAR CORPORATION
                            Condensed Balance Sheets
               (Unaudited and in thousands, except share data)


                                                        June 30,       Dec. 31,
                                                          2003           2002
                                                      -----------    -----------

ASSETS
Current assets:
   Cash and cash equivalents                          $    2,800     $    2,383
   Restricted cash                                            70            110
   Trade accounts receivable, net of
     reserves of $74 (2003) and $90 (2002)                 1,177          1,557
   Inventories, net                                        2,506          2,401
   Demonstration equipment                                    95             95
   Prepaid expenses                                           60            186
                                                      -----------    -----------
     Total current assets                                  6,708          6,732

Property and equipment, net                                3,852          3,991
Other assets                                                  50             56
                                                      -----------    -----------

                                                      $   10,610     $   10,779
                                                      ===========    ===========

LIABILITIES & SHAREHOLDERS' EQUITY
Current liabilities:
   Accounts payable                                   $      216     $      220
   Accrued liabilities                                       543            378
   Industrial development bonds                            2,900          3,000
                                                      -----------    -----------
      Total current liabilities                            3,659          3,598
                                                      -----------    -----------

Shareholders' equity:
  Common stock, $.01 par value.  Authorized                   31             31
     20,000,000 shares; 3,078,394 and
     3,083,051 shares issued and
     outstanding at June 30, 2003 and
     Dec. 31, 2002, respectively
  Additional paid-in capital                               4,529          4,534
  Retained earnings                                        2,391          2,616
                                                      -----------    -----------
     Total shareholders' equity                            6,951          7,181
                                                      -----------    -----------

                                                      $   10,610     $   10,779
                                                      ===========    ===========

SEE ACCOMPANYING NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS.

                                       3

<PAGE>

<TABLE>
                                        AMISTAR CORPORATION
                                 Condensed Statements of Operations
                        (Unaudited and in thousands, except per share data)
<CAPTION>

                                              Three months ended             Six months ended
                                                    June 30,                      June 30,
                                              2003           2002           2003           2002
                                          ------------   ------------   ------------   ------------
<S>                                       <C>            <C>            <C>            <C>
Net sales                                 $     2,652    $     2,827    $     5,421    $     5,468

Cost of sales                                   2,135          2,658          4,366          5,139
                                          ------------   ------------   ------------   ------------

Gross profit                                      517            169          1,055            329
                                          ------------   ------------   ------------   ------------

Operating expenses:
  Selling                                         313            291            643            583
  General and administrative                      235            208            478            467
  Engineering, research and development            43            126            150            243
                                          ------------   ------------   ------------   ------------
                                                  591            625          1,271          1,293
                                          ------------   ------------   ------------   ------------

Operating loss                                    (74)          (456)          (216)          (964)

Other income (expense), net                        (4)             4             (7)            12
                                          ------------   ------------   ------------   ------------

Loss before income taxes                          (78)          (452)          (223)          (952)

Income tax expense (benefit)                        1              2              2           (396)
                                          ------------   ------------   ------------   ------------

Net loss                                  $       (79)   $      (454)   $      (225)   $      (556)
                                          ============   ============   ============   ============

Earnings (loss) per share-
   basic and diluted                      $     (0.03)   $     (0.15)   $     (0.07)   $     (0.18)
                                          ============   ============   ============   ============

Weighted average shares
   outstanding, basic and diluted               3,081          3,086          3,081          3,086
                                          ============   ============   ============   ============

SEE ACCOMPANYING NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS.

                                                 4
</TABLE>

<PAGE>

                               AMISTAR CORPORATION
                            Statements of Cash Flows
                          (Unaudited and in thousands)


                                                            Six months ended
                                                                 June 30,
                                                            2003         2002
                                                         ----------   ----------

Cash flows from operating activities:
  Net loss                                               $    (225)   $    (556)
  Adjustments to reconcile net loss to
    net cash provided (used) in operating activities:
    Depreciation and amortization                              183          296
    Changes in assets and liabilities:
      Trade accounts receivable, net                           380         (217)
      Inventories                                             (105)        (126)
      Income taxes receivable                                   --         (400)
      Demonstration equipment                                   --           54
      Prepaid expenses and other assets                        132          141
      Accounts payable and accrued liabilities                 161         (142)
                                                         ----------   ----------

Net cash provided (used) in operating activities               526         (950)
                                                         ----------   ----------

Cash flows from investing activities-
  Purchase of property and equipment                           (44)         (86)
                                                         ----------   ----------

Cash flows from financing activities:
  Redemption of Industrial Development Bonds                  (100)      (1,500)
  Decrease in restricted cash, net                              40        1,412
  Repurchase of common stock                                    (5)          (1)
                                                         ----------   ----------
Net cash used in financing activities                          (65)         (89)
                                                         ----------   ----------

Net increase (decrease) in cash and cash equivalents           417       (1,125)
Cash and cash equivalents, beginning of period               2,383        3,626
                                                         ----------   ----------
Cash and cash equivalents, end of period                 $   2,800    $   2,501
                                                         ==========   ==========

Supplemental disclosure of cash flow information-

   Cash paid during the period for:
       Interest                                          $      15    $      22
                                                         ==========   ==========
       Income taxes                                      $       3    $       5
                                                         ==========   ==========

SEE ACCOMPANYING NOTES TO UNAUDITED CONDENSED FINANCIAL STATEMENTS.

                                       5

<PAGE>

                               AMISTAR CORPORATION
                     Notes to Condensed Financial Statements
                                   (Unaudited)

(1)  BUSINESS AND CURRENT EVENTS

Notice from Stock Exchange
--------------------------

     The Company had received notice on October 4, 2002 that it was subject to
de-listing from the NASDAQ Small Cap Market for failure to meet the minimum
closing bid price requirement of $1.00 for the prior 30 days.

     The Company subsequently received notice from Nasdaq on May 29, 2003 that
it regained compliance with the minimum closing bid price requirement and as a
result, is now in full compliance with the listing requirements.

(2)  SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation
---------------------

     The accompanying unaudited condensed financial statements of the Company
have been prepared in accordance with Rule 10-01 of Regulation S-X promulgated
by the Securities and Exchange Commission and, therefore, do not include all
information and footnotes necessary for a fair presentation of financial
position, results of operations and cash flows in conformity with accounting
principles generally accepted in the United States of America. In the opinion of
the Company, however, the accompanying unaudited condensed financial statements
contain all adjustments, consisting only of normal recurring adjustments,
necessary to present fairly the Company's financial position as of June 30,
2003, its results of operations for the three and six-month periods ended June
30, 2003 and 2002, and its cash flows for the six month periods ended June 30,
2003 and 2002, respectively. The results of operations of the Company for the
six-month period ended June 30, 2003 may not be indicative of future results.
These condensed unaudited financial statements should be read in conjunction
with the financial statements and notes thereto included in the Company's annual
report on Form 10-K for the year ended December 31, 2002 as filed with the
Securities and Exchange Commission on March 26, 2003.

                                       6

<PAGE>

                               AMISTAR CORPORATION
               Notes to Condensed Financial Statements, continued
                                   (Unaudited)

Inventories
-----------

    Inventories are stated at the lower of cost (first-in, first-out) or market
and include material, labor and manufacturing overhead costs. Inventories
consist of the following (in thousands), net of reserves of $2,178 (2003) and
$2,174 (2002):

                                      June 30                   Dec. 31,
                                       2003                       2002
                            -------------------------  -------------------------
                               AIA      AMS    Total      AIA      AMS    Total
                               ---      ---    -----      ---      ---    -----

Raw Material                $  334   $  730   $1,064   $  210   $  580   $  790
Work In Process                526      163      689      569      161      730
Finished Goods                 674       79      753      669      212      881
                            -------------------------  -------------------------
 Total                      $1,534   $  972   $2,506   $1,448   $  953   $2,401
                            =========================  =========================

Earnings Per Common Share
-------------------------

     The Company calculates net earnings (loss) per share in accordance with
SFAS No. 128, Earnings Per Share. Under SFAS No. 128, basic net earnings (loss)
per common share is calculated by dividing net earnings (loss) by the
weighted-average number of common shares outstanding during the reporting
period. Diluted net earnings (loss) per common share reflects the effects of
potentially dilutive securities where the effect of inclusion of such securities
would not be anti-dilutive. Weighted average shares used to compute net earnings
(loss) per share are presented below (in thousands):

                                       Three months ended       Six months ended
                                            June 30,                June 30,
                                         2003      2002          2003      2002
                                        ------    ------        ------    ------
Weighted-average shares, basic          3,081     3,086         3,081     3,086

Dilutive effect of stock options           --        --            --        --
                                        ------    ------        ------    ------
Weighted-average shares-
    basic and diluted                   3,081     3,086         3,081     3,086
                                        ======    ======        ======    ======

     Options to purchase 83,000 and 73,000 shares of potentially dilutive common
stock were excluded from the calculation of diluted net earnings (loss) per
share for the three and six months ended June 30, 2003, and June 30, 2002
respectively, because the effects of these instruments were anti-dilutive.

                                       7

<PAGE>

                               AMISTAR CORPORATION
               Notes to Condensed Financial Statements, continued
                                   (Unaudited)

Industrial Development Bonds
----------------------------

     The Company maintains a letter of credit from its bank in support of the
$2,900,000 industrial development bonds, which is secured by substantially all
the assets of the company. The bonds accrue interest at a variable monthly rate,
and interest was paid at a weighted-average variable rate of 1.17% during the
quarter ending June 30, 2003. On February 1, 2002, the Company paid $1,500,000
to redeem a portion of the industrial development bonds utilizing the restricted
cash balance of $1,452,000 plus an additional $48,000 of unrestricted cash.
Effective March 1, 2002, the Company began making required monthly payments of
$10,000 per month into a sinking fund (restricted cash) for redemption of the
bonds. Redemption will occur in minimum increments of $100,000 as the funds
accrete to the minimum redemption level. The first payment of $100,000 was made
on January 21, 2003. The terms of the Reimbursement Agreement require the
Company to make annual payments of $120,000 during 2003 and 2004, and the
balance of $2,760,000 in 2005.

     The Company's stand-by letter of credit reimbursement agreement with its
bank contains certain affirmative financial covenants. At June 30, 2003, the
Company was not in compliance with the tangible net worth and debt service
covenants. The Company received waivers relating to these covenants through
September 30, 2003. The Company has made all required debt service payments on
the bonds. However, based on the uncertainty concerning the Company's ability to
meet the covenant after the waiver expires, and considering that a covenant
violation would constitute an event of default and allow the bank to call the
debt prior to maturity, the entire Industrial Development bonds balance has been
classified as a current liability in the accompanying balance sheets.

     The inability of the Company to return to profitability could result in
default on the terms of the Union Bank of California Reimbursement Agreement,
which supports the stand-by letter of credit guaranteeing the Company's
performance on the industrial development bonds. In the event the Company
defaults and is unable to present a viable turn-around plan satisfactory to its
Bank, such event could cause the bank to require the Company to seek a
substitute guarantor, re-finance the building with alternative financing or sell
the San Marcos, California facility. The inability of the Company to
successfully substitute a guarantor or to re-finance the building could have a
materially adverse effect on the Company's business. The Company will continue
to seek waivers for any covenant violations in the future until a modification
of the covenants can be negotiated.

     In the event the bank chooses to no longer forbear, management would
consider several options which include utilizing some portion of cash,
refinancing the building with alternative financing, a sale-leaseback or sale of
the San Marcos, California facility and relocation to a leased facility.
Management believes that it has the ability to execute its alternate plans in
the event that repayment of the Company's industrial development bonds would be
required in 2003, and the Company would have adequate finances to fund its
operating, investing and financing activities through 2003 under either scenario
for repayment of its industrial development bonds.

     The Company believes the bank will continue to forbear for the foreseeable
future due to the Company's improvement in operating profit over the past eight
quarters.

                                       8

<PAGE>

                               AMISTAR CORPORATION
               Notes to Condensed Financial Statements, continued
                                   (Unaudited)

     The Company believes that cash provided from operations and cash balances
at June 30, 2003 will be adequate to support its operating and investing
requirements for the next twelve-month period.

Industry Segments and Geographic Information
--------------------------------------------

     The following table summarizes the Company's two operating segments:
Amistar Industrial Automation ("AIA"), which encompasses the manufacture and
distribution of manufacturing machinery, specialty products, and related
accessories, and Amistar Manufacturing Services ("AMS"), which encompasses
electronics manufacturing services. The Company identifies reportable segments
based on the unique nature of operating activities, customer base and marketing
channels. Information is also provided by major geographical area (dollars in
thousands).

<TABLE>
<CAPTION>
                                                  AIA
                                    -------------------------------
                                     UNITED
                                     STATES     FOREIGN      TOTAL       AMS     CORPORATE     TOTAL
------------------------------------------------------------------------------------------------------
<S>                                 <C>        <C>         <C>        <C>        <C>         <C>
Three months ended June 30, 2003

Net sales                           $   705    $     31    $   736    $ 1,916    $    --     $  2,652
                                    ========   =========   ========   ========   =========   =========
Depreciation and amortization            26          --         26         55           8          89
                                    ========   =========   ========   ========   =========   =========
Income/(Loss) from operations           (60)         (2)       (62)       (12)         --         (74)
                                    ========   =========   ========   ========   =========   =========
Total assets                          4,558          52      4,610      2,039       3,961      10,610
                                    ========   =========   ========   ========   =========   =========
Additions to long-lived assets            9          --          9         --          --           9
                                    ========   =========   ========   ========   =========   =========

THREE MONTHS ENDED JUNE 30, 2002

Net sales                           $   335    $     49    $   384    $ 2,443    $     --    $  2,827
                                    ========   =========   ========   ========   =========   =========
Depreciation and amortization            50          --         50         86          --         136
                                    ========   =========   ========   ========   =========   =========
Loss from operations                   (275)        (40)      (315)      (141)         --        (456)
                                    ========   =========   ========   ========   =========   =========
Total assets                          4,916          48      4,964      2,023       4,480      11,467
                                    ========   =========   ========   ========   =========   =========
Additions to long-lived assets           --          --         --         77           7          84
                                    ========   =========   ========   ========   =========   =========

SIX MONTHS ENDED JUNE 30, 2003

Net sales                           $ 1,298    $     67    $ 1,365    $ 4,056    $     --    $  5,421
                                    ========   =========   ========   ========   =========   =========
Depreciation and amortization            55          --         55        113          15         183
                                    ========   =========   ========   ========   =========   =========
Earnings (loss) from operations        (256)        (13)      (269)        53          --        (216)
                                    ========   =========   ========   ========   =========   =========
Additions to long-lived assets           44          --         44         --          --          44
                                    ========   =========   ========   ========   =========   =========

SIX MONTHS ENDED JUNE 30, 2002

Net sales                           $   684    $     88    $   772    $ 4,696    $     --    $  5,468
                                    ========   =========   ========   ========   =========   =========
Depreciation and amortization           110          --        110        186          --         296
                                    ========   =========   ========   ========   =========   =========
Earnings (loss) from operations        (543)        (70)      (613)      (351)         --        (964)
                                    ========   =========   ========   ========   =========   =========
Additions to long-lived assets            2          --          2         77           7          86
                                    ========   =========   ========   ========   =========   =========
</TABLE>

                                                  9

<PAGE>

                               AMISTAR CORPORATION
               Notes to Condensed Financial Statements, continued
                                   (Unaudited)

Product Warranty Information
----------------------------

     The Company provides for the estimated cost of product warranties at the
time revenue is recognized. While the Company engages in extensive product
quality programs and processes, including actively monitoring and evaluating the
quality of its component suppliers, the Company's warranty obligation is
affected by product failure rates and the related material usage, field service
and delivery costs incurred in correcting a product failure. Should actual
product failure rates, material usage, or service delivery costs differ from the
Company's estimates, revisions to the estimated warranty liability would be
required.

         Warranty cost and accrual information is as follows for the three and
six months ended June 30, 2003:

                                        Charged to
         Period            Beginning    costs and                  Balance at
        Beginning           Balance      expense     Deductions    6/30/2003
   -------------------     ---------    ---------    ----------    ---------

      3/31/2003            $ 45,876     $(20,185)     $     91     $ 25,782
                           =========    =========     =========    =========

     12/31/2002            $ 45,876     $(27,345)     $  7,251     $ 25,782
                           =========    =========     =========    =========

                                       10

<PAGE>

                               AMISTAR CORPORATION
               Notes to Condensed Financial Statements, continued
                                   (Unaudited)

Stock-Based Compensation
------------------------

     In December 2002, the FASB issued SFAS No. 148, "Accounting for Stock-Based
Compensation -- Transition and Disclosure", which amended SFAS No. 123,
"Accounting for Stock-Based Compensation." The new standard provides alternative
methods of transition for a voluntary change to the fair market value based
method for accounting for stock-based employee compensation. Additionally, the
statement amends the disclosure requirements of SFAS No. 123 to require
prominent disclosures in both annual and interim financial statements about the
method of accounting for stock-based employee compensation and the effect of the
method used on reported results. This statement is effective for financial
statements for the year ended December 31, 2002. In compliance with SFAS No.
148, the Company has elected to continue to follow the intrinsic value method in
accounting for its stock-based employee compensation plan as defined by APB No.
25 and has made the applicable disclosures below.

     Had the Company determined employee stock based compensation cost based on
a fair value model at the grant date for its stock options under SFAS 123, the
Company's net earnings (loss) per share would have been adjusted to the pro
forma amounts for the three and six months ended June 30, 2003 and 2002 as
follows ($ in thousands, except per share amounts):

<TABLE>
<CAPTION>
                                             Three months ended      Six months ended
                                                  June. 30,              June 30,
                                              2003       2002        2003        2002
                                              ----       ----        ----        ----

<S>                                        <C>        <C>         <C>         <C>
Net loss - as reported                     $  (79)    $  (454)    $  (225)    $  (556)
Stock-Based employee compensation
  expense included in reported net
  income, net of tax                           --          --          --          --
Total stock-based employee
  compensation expense determined
  under fair-value-based method for all
  rewards, net of tax                             (1)         (2)         (6)         (5)
                                           ----------------------   ---------------------
Pro forma net loss                         $     (80)   $   (456)   $   (231)   $   (561)
                                           ======================   =====================

Earnings (loss) per share:

Basic, as reported                         $   (0.03)   $  (0.15)   $  (0.07)   $  (0.18)

Diluted, as reported                       $   (0.03)   $  (0.15)   $  (0.07)   $  (0.18)

Basic, pro forma                           $   (0.03)   $  (0.15)   $  (0.07)   $  (0.18)

Diluted, pro forma                         $   (0.03)   $  (0.15)   $  (0.07)   $  (0.18)
</TABLE>

                                             11

<PAGE>

                               AMISTAR CORPORATION
               Notes to Condensed Financial Statements, continued
                                   (Unaudited)

Stock option activity during the six months ending June 30, 2003 was as follows:

<TABLE>
<CAPTION>
   (SHARES IN THOUSANDS)                         NUMBER          WEIGHTED AVERAGE        WEIGHTED FAIR
                                                OF SHARES         EXERCISE PRICE        VALUE PER SHARE
                                                ---------         --------------        ---------------
<S>                                                 <C>         <C>                              <C>
   Outstanding, Dec 31, 2002                        165,000     $           1.85

   Granted                                           86,000                 0.82                 0.59

   Exercised
                                                          -                    -

   Expired                                          (16,000)                2.75
                                              --------------    -----------------

   Outstanding, June 30, 2003                       235,000     $           1.41
                                              ==============    =================
</TABLE>

                                       12

<PAGE>

                               AMISTAR CORPORATION

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

Forward Looking Statements
--------------------------

     This Quarterly Report contains forward-looking statements within the
meaning of the Private Securities Reform Act of 1995, particularly statements
regarding market opportunities, customer acceptance of products, gross margin
and marketing expenses. These forward-looking statements involve risks and
uncertainties, and the cautionary statements set forth below identify important
factors that could cause actual results to differ materially from those in any
such forward-looking statements. Such factors include, but are not limited to,
adverse changes in general economic conditions, including changes in the
specific markets for the Company's products, product availability, decreased or
lack of growth in the electronics industry, adverse changes in customer order
patterns, increased competition, lack of acceptance of new products, pricing
pressures, lack of success in technological advancements, risks associated with
foreign trade and other factors.


                              RESULTS OF OPERATIONS

SECOND QUARTER 2003 COMPARED TO SECOND QUARTER 2002
Net Sales
---------

     Net sales for the three months ended June 30, 2003 were $2,652,000 compared
to $2,827,000 for the same period in the prior year, a decrease of 6.2%. During
the current quarter, the Amistar Industrial Automation ("AIA") division shipped
one of its customized 100LP DataPlace labeler machines and five DataPlace Shaft
Band Labeler machines, whereas no machines were shipped during the second
quarter of 2002.

     The AIA division sales in the current quarter included a labeler machine to
a customer in the life sciences industry and specialty equipment to customers in
the veterinary products industry and the golf club assembly business. The
Company expects to ship custom engineered machines based on orders that have
been received, and are in production, in the third quarter of 2003 to a customer
doing business in the eyeglass lens manufacturing industry.

     Sales of distributed circuit board assembly machine accessories and spare
parts grew 568% over the second quarter of 2002, from $16,000 to $107,000, and
33% over the first quarter of 2003, from $80,000 to $107,000.

     The Amistar Manufacturing Services division ("AMS") sales declined 22% to
$1,916,000 for the three months ended June 30, 2003, from $2,443,000 for the
same period in 2002 primarily due to the absence of orders from customers who
chose to move production off-shore. Sales also decreased 10% compared to the
first quarter of 2003 due to a reduction in orders from a customer in the test
equipment industry.

Gross Profit
------------

     Gross profit increased $348,000, or 206%, to $517,000 during the quarter
ended June 30, 2003 compared to $169,000 in the same period in 2002. This
increase was primarily due to the sale of one customized DataPlace machine and
five Shaft Band Labelers in the second quarter of 2003, whereas in the second
quarter of 2002 no machines were sold. Gross profit was also

                                       13

<PAGE>

                              AMISTAR CORPORATION

increased due to improved labor efficiencies in the manufacturing services
division as well as lower costs of purchased components. During the current
quarter, manufacturing services margins increased to 14.9% in the second quarter
of 2003 from 8.1% in the second quarter of 2002.

Selling Expenses
----------------

     Selling expenses increased 7.6% in the current quarter from the second
quarter of 2002, from $291,000 to $313,000 primarily to support the higher
DataPlace machine sales.

General and Administrative Expenses
-----------------------------------

     The general and administrative expenses increased 13%, from $208,000 in the
second quarter of 2002 to $235,000 in the second quarter of 2003 primarily due
to a reduction in the allowance for doubtful accounts during the second quarter
of 2002.

Engineering, Research and Development Expenses
----------------------------------------------

     Research and development expenses decreased 66% in the current quarter over
the same period in 2002, from $126,000 to $43,000. The engineering group
provided billable engineering design services to a DataPlace machine customer
and allocated $28,000 in engineering labor costs to work-in-process related to a
design contract.

Income Taxes
------------

     On March 9, 2002, the "Job Creation and Worker Assistance Act of 2002" (the
"Act") was signed into law. The Act extends the period in which a net operating
loss may be carried back. As a result, the Company recognized a $400,000
carry-back refund benefit and receivable during the three months ended March 31,
2002, which was partially offset by a $2,000 provision for the minimum tax
liability to various states. No comparable benefit was available in the same
period in 2003.

     A 100% valuation allowance was recorded against deferred tax assets.

FIRST SIX MONTHS OF 2003 COMPARED TO FIRST SIX MONTHS OF 2002
Net Sales
---------

     Net sales for the six months ended June 30, 2003 were $5,421,000 compared
to $5,468,000 for the same period in the prior year, a decrease of 0.9%. During
the first six months of 2003, the Amistar Industrial Automation ("AIA") division
shipped two of its 100LP DataPlace labeler machines, one of its 1M DataPlace
labeler machines, and five DataPlace shaft band labeler machines, whereas no
machines were shipped during the first six months of 2002.

     The AIA division sales in the first six months included labeler machines to
customers in the life sciences and electronics industries and specialty
equipment to customers in the veterinary products industry, the food irradiation
industry, and the golf club assembly business.

     Sales of distributed circuit board assembly machine accessories and spare
parts grew 503% over the first six months of 2002, from $31,000 to $187,000.

                                       14

<PAGE>

                              AMISTAR CORPORATION

     The Amistar Manufacturing Services division ("AMS") sales declined 14% to
$4,056,000 for the six months ended June 30, 2003, from $4,696,000 for the same
period in 2002, primarily due to the absence of orders from customers who chose
to move production offshore.

Gross Profit
------------

     Gross profit increased $726,000, or 221%, to $1,055,000 during the six
months ended June 30, 2003 compared to $329,000 in the same period in 2002. This
increase was primarily due to the sale of three DataPlace labeler machines and
five Golf Shaft Band labelers in the first six months of 2003, whereas in the
first six months of 2002 no machines were sold. Gross profit was also increased
due to improved labor efficiencies in the manufacturing services division as
well as lower costs of purchased components.

Selling Expenses
----------------

     Selling expenses increased 10% in the first six months of 2003 from the
same period of 2002, from $583,000 to $643,000 primarily to support the higher
DataPlace machine sales.

General and Administrative Expenses
-----------------------------------

     The general and administrative expenses increased 2%, from $467,000 in the
first six months of 2002 to $478,000 in the same period of 2003 primarily due to
a reduction in the allowance for doubtful accounts during the second quarter of
2002.

Engineering, Research and Development Expenses
----------------------------------------------

     Engineering, research and development expenses decreased 38% in the first
six months of 2003 over the same period in 2002, from $243,000 to $150,000. The
engineering group provided billable engineering design services to a DataPlace
machine customer and allocated $28,000 in engineering labor costs to
work-in-process related to a design contract.

Income Taxes
------------

     On March 9, 2002, the "Job Creation and Worker Assistance Act of 2002" (the
"Act") was signed into law. The Act extends the period in which a net operating
loss may be carried back. As a result, the Company recognized a $400,000
carry-back refund benefit and receivable during the three months ended March 31,
2002, which was partially offset by a $4,000 provision for the minimum tax
liability to various states. No comparable benefit was available in the same
period in 2003.

     A 100% valuation allowance was recorded against deferred tax assets.

                                       15

<PAGE>

                               AMISTAR CORPORATION
                         LIQUIDITY AND CAPITAL RESOURCES

     The Company's cash provided from operating activities was $526,000 for the
six months ended June 30, 2003, a $1,476,000 increase over the cash used in
operating activities of $950,000 for the six months ended June 30, 2002. The
improvement was due to a decreased loss, the collection of receivables, and an
increase in the accrued payables primarily due to deposits made by customers for
machine orders, and the timing of payroll tax payments.

     The Company maintains a letter of credit from its bank in support of the
$2,900,000 industrial development bonds, which is secured by substantially all
the assets of the company. The bonds accrue interest at a variable monthly rate,
and interest was paid at a weighted-average variable rate of 1.17% during the
quarter ending June 30, 2003. On February 1, 2002, the Company paid $1,500,000
to redeem a portion of the industrial development bonds utilizing the restricted
cash balance of $1,452,000 plus an additional $48,000 of unrestricted cash.
Effective March 1, 2002, the Company began making required monthly payments of
$10,000 per month into a sinking fund (restricted cash) for redemption of the
bonds. Redemption will occur in minimum increments of $100,000 as the funds
accrete to the minimum redemption level. The first payment of $100,000 was made
on January 21, 2003. The terms of the Reimbursement Agreement require the
Company to make annual payments of $120,000 during 2003 and 2004, and the
balance of $2,760,000 in 2005.

     The Company's stand-by letter of credit reimbursement agreement with its
bank contains certain affirmative financial covenants. At June 30, 2003, the
Company was not in compliance with the tangible net worth and debt service
covenants. The Company received waivers relating to these covenants through
September 30, 2003. The Company has made all required debt service payments on
the bonds. However, based on the uncertainty concerning the Company's ability to
meet the covenant after the waiver expires, and considering that a covenant
violation would constitute an event of default and allow the bank to call the
debt prior to maturity, the entire Industrial Development bonds balance has been
classified as a current liability in the accompanying balance sheets.

     The inability of the Company to return to profitability could result in
default on the terms of the Union Bank of California Reimbursement Agreement,
which supports the stand-by letter of credit guaranteeing the Company's
performance on the industrial development bonds. In the event the Company
defaults and is unable to present a viable turn-around plan satisfactory to its
Bank, such event could cause the bank to require the Company to seek a
substitute guarantor, re-finance the building with alternative financing or sell
the San Marcos, California facility. The inability of the Company to
successfully substitute a guarantor or to re-finance the building could have a
materially adverse effect on the Company's business. The Company will continue
to seek waivers for any covenant violations in the future until a modification
of the covenants can be negotiated.

     In the event the bank chooses to no longer forbear, management would
consider several options which include utilizing some portion of cash,
refinancing the building with alternative financing, a sale-leaseback or sale of
the San Marcos, California facility and relocation to a leased facility.
Management believes that it has the ability to execute its alternate plans in
the event that repayment of the Company's industrial development bonds would be
required in 2003, and the Company would have adequate finances to fund its
operating, investing and financing activities through 2003 under either scenario
for repayment of its industrial development bonds.

                                       16

<PAGE>

                               AMISTAR CORPORATION

     The Company believes the bank will continue to forbear for the foreseeable
future due to the Company's improvement in operating profit over the past eight
quarters.

     The Company believes that cash provided from operations and cash balances
at June 30, 2003 will be adequate to support its operating and investing
requirements for the next twelve-month period.

New Accounting Pronouncements
-----------------------------

     In April 2003, SFAS No. 149, "Amendment of Statement 133 on Derivative
Instruments and Hedging Activities" was issued. This statement amends and
clarifies financial accounting and reporting for derivative instruments,
including certain derivative instruments embedded in other contracts
(collectively referred to as derivatives) and for hedging activities under SFAS
No. 133, "Accounting for Derivative Instruments and Hedging Activities." This
statement is effective for contracts entered into or modified after June 30,
2003. Adoption of this statement is not expected to have a significant effect on
the Company's financial position or results of operations.

     In May 2003, SFAS No. 150, "Accounting for Certain Financial Instruments
with Characteristics of Both Liabilities and Equity" was issued. This statement
establishes standards for how an issuer classifies and measures certain
financial instruments with characteristics of both liabilities and equity. This
statement is effective for financial instruments entered into or modified after
May 31, 2003. The adoption of SFAS No. 150 is not expected to have a significant
effect on the Company's financial position, results of operations, or cash
flows.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

     The Company is exposed to a variety of risks, including changes in interest
rates affecting the cost of its debt. The Company's long-term debt at June 30,
2003 is comprised of $2,900,000 Industrial Development bonds. The bonds mature
in December 2005, and accrue interest at a variable monthly rate. Interest was
paid at a weighted-average variable rate of 1.17% during the quarter ending June
30, 2003. An immediate 10% increase in the weighted-average interest rate would
not have a material impact on the Company's financial position or results of
operations.

ITEM 4. CONTROLS AND PROCEDURES

     On June 17, 2003, management conducted an evaluation, under the supervision
of and with the participation of the Company's Chief Executive Officer and Chief
Financial Officer of the effectiveness of the Company's disclosure controls and
procedures. Based on this evaluation, management believes the disclosure
controls and procedures in place are effective to ensure that information
required to be disclosed by the Company in the reports that it files or submits
under the Securities Exchange Act of 1934 is recorded, processed, summarized and
reported within the time periods specified in the SEC's rules and forms.

     Since the date of management's evaluation of its internal disclosure
controls there have been no significant changes in the Company's internal
disclosure controls or in other factors

                                       17

<PAGE>

                               AMISTAR CORPORATION

that could significantly affect internal disclosure controls subsequent to the
date the Company completed its evaluation.


PART II. OTHER INFORMATION


ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

     The Annual Meeting of Shareholders of the Company was held on May 7, 2003.
Six directors were elected at the annual meeting for a term expiring at the 2004
Annual Meeting. The votes were recorded as follows:

<TABLE>
<CAPTION>
-------------------    ---------   -----------   ----------   ---------    ---------    ---------
                       Stuart C.   Dr. Sanford   William W.   Gordon S.     Carl C.     Howard C.
                         Baker     B. Ehrlich      Holl       Marshall      Roecks        White
-------------------    ---------   -----------   ----------   ---------    ---------    ---------
<S>                    <C>          <C>          <C>          <C>          <C>          <C>
Votes For              3,022,661    3,029,661    3,019,328    3,022,661    3,022,661    3,029,661
-------------------    ---------    ---------    ---------    ---------    ---------    ---------

Votes Against               ____         ____         ____         ____         ____         ____
-------------------    ---------    ---------    ---------    ---------    ---------    ---------

Votes withheld            11,983        4,383       14,716       11,983       11,983        4,383
-------------------    ---------    ---------    ---------    ---------    ---------    ---------

Total Votes            3,034,644    3,034,644    3,034,644    3,034,644    3,034,644    3,034,644
-------------------    ---------    ---------    ---------    ---------    ---------    ---------
</TABLE>

NOTICE FROM STOCK EXCHANGE

     The Company had received notice on October 4, 2002 that it was subject to
de-listing from the NASDAQ Small Cap Market for failure to meet the minimum
closing bid price requirement of $1.00 for the prior 30 days.

     The Company subsequently received notice from Nasdaq on May 29, 2003 that
it regained compliance with the minimum closing bid price requirement and as a
result, is now in full compliance with the listing requirements.

                                       18

<PAGE>

                               AMISTAR CORPORATION

ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K

         (a) Exhibits:
                    99.1 Certification of President and Chief Financial Officer
         (b) Reports on form 8-K:
                    Change in Registrant's Certifying Accountant

         The Registrant filed a Form 8-K on April 4, 2003 regarding changes in
registrants certified accountants.

         On April 1, 2003, the Company's audit committee, as affirmed by the
board of directors, dismissed KPMG, LLP ("KPMG") as the Company's independent
auditors for the year ending December 31, 2003, and appointed BDO Seidman, LLP,
as the Company's independent auditors.

         The decision to change auditors is the result of the Company's ongoing
efforts to reduce expenses.

         KPMG's reports on the Company's financial statements for the fiscal
years ended December 31, 2002 and 2001, did not contain any adverse opinion or
disclaimer of opinion, nor were such reports qualified or modified as to
uncertainty, audit scope or accounting principles.

         During the fiscal years ended December 31, 2002 and 2001, and through
the subsequent period ended April 1, 2003, there were no disagreements with KPMG
on any matter of accounting principle or practice, financial statement
disclosure, or auditing scope or procedure which, if not resolved to KPMG's
satisfaction, would have caused them to make reference to the subject matter of
the disagreement in connection with the audit reports on the Company's financial
statements for such years.

         The Company has provided KPMG with a copy of the foregoing disclosure
and has requested that KPMG furnish it with a letter addressed to the Securities
and Exchange Commission stating whether or not it agrees with the above
statements. Attached as Exhibit 16.1 is a copy of KPMG's letter.

         Neither the Company nor anyone engaged on its behalf has consulted with
BDO Seidman, LLP during the Company's two most recently completed fiscal years
or during its current fiscal year with regard to either: (i) the application of
accounting principles to a specified transaction, either completed or proposed,
or the type of audit opinion that might be rendered on the Company's financial
statements; or (ii) any other matters or reportable events as set forth in Items
304(a)(2)(i) and (ii) or Regulation S-K.

                                       19

<PAGE>

                               AMISTAR CORPORATION

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.

Dated: July 31, 2003

                              AMISTAR CORPORATION


                              By /s/ Gregory D. Leiser
                              ---------------------------------
                              Gregory D. Leiser
                              Vice President Finance and Chief Financial Officer
                              (Principal Financial and Accounting Officer)

                                       20

<PAGE>

                                 CERTIFICATIONS

I, Stuart C. Baker, certify that:

1)   I have reviewed this quarterly report on Form 10-Q for the three and
     six-months ended June 30, 2003;

2)   Based on my knowledge, this quarterly report does not contain any untrue
     statements of a material fact or omit to state a material fact necessary to
     make the statements made, in light of the circumstances under which such
     statements were made, not misleading with respect to the period covered by
     this quarterly report;

3)   Based on my knowledge, the financial statements, and other financial
     information included in this quarterly report, fairly present in all
     material respects the financial condition, results of operations and cash
     flows of the registrant as of, and for, the periods presented in this
     quarterly report;

4)   The registrant's other certifying officer and I are responsible for
     establishing and maintaining disclosure controls and procedures (as defined
     in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:
     a)   designed such disclosure controls and procedures to ensure that
          material information relating to the registrant, including its
          consolidated subsidiaries, is made known to us by others within those
          entities particularly during the period in which the quarterly report
          is being prepared;
     b)   evaluated the effectiveness of the registrant's disclosure controls
          and procedures as of a date within 90 days prior to the filing date of
          this quarterly report (the "Evaluation Date"); and
     c)   presented in this quarterly report our conclusions about the
          effectiveness of the disclosure controls and procedures based on our
          evaluation as of the Evaluation Date;

5)   The registrant's other certifying officer and I have disclosed, based on
     our most recent evaluation, to the registrant's auditors and the audit
     committee of the registrant's board of directors (or persons performing the
     equivalent function):
     a)   all significant deficiencies in the design or operation of internal
          controls which could adversely affect the registrant's ability to
          record, process, summarize and report financial data and have
          identified for the registrant's auditors any material weaknesses in
          internal controls; and
     b)   any fraud, whether or not material, that involves management or other
          employees who have a significant role in the registrant's internal
          controls; and

6)   The registrant's other certifying officer and I have indicated in this
     quarterly report whether or not there were significant changes in internal
     controls or in other factors that could significantly affect internal
     controls subsequent to the date of our most recent evaluation, including
     any corrective actions with regard to significant deficiencies and material
     weaknesses.

Dated:  July 31, 2003

                                             By: /s/ Stuart C. Baker
                                                 --------------------------
                                             Name: Stuart C. Baker
                                             Title: President

                                       21

<PAGE>

I, Gregory D. Leiser, certify that:

1)   I have reviewed this quarterly report on Form 10-Q for the three and
     six-months ended June 30, 2003;

2)   Based on my knowledge, this quarterly report does not contain any untrue
     statements of a material fact or omit to state a material fact necessary to
     make the statements made, in light of the circumstances under which such
     statements were made, not misleading with respect to the period covered by
     this quarterly report;

3)   Based on my knowledge, the financial statements, and other financial
     information included in this quarterly report, fairly present in all
     material respects the financial condition, results of operations and cash
     flows of the registrant as of, and for, the periods presented in this
     quarterly report;

4)   The registrant's other certifying officer and I are responsible for
     establishing and maintaining disclosure controls and procedures (as defined
     in Exchange Act Rules 13a-14 and 15d-14) for the registrant and we have:
     a)   designed such disclosure controls and procedures to ensure that
          material information relating to the registrant, including its
          consolidated subsidiaries, is made known to us by others within these
          entities, particularly during the period in which this quarterly
          report is being prepared;
     b)   evaluated the effectiveness of the registrant's disclosure controls
          and procedures as of a date within 90 days prior to the filing date of
          this quarterly report (the "Evaluation Date"); and
     c)   presented in this quarterly report our conclusions about the
          effectiveness of the disclosure controls and procedures based on our
          evaluation as of the Evaluation Date;

5)   The registrant's other certifying officer and I have disclosed, based on
     our most recent evaluation, to the registrant's auditors and the audit
     committee of the registrant's board of directors (or persons performing the
     equivalent function):
     a)   all significant deficiencies in the design or operation of internal
          controls which could adversely affect the registrant's ability to
          record, process, summarize and report financial data and have
          identified for the registrant's auditors any material weaknesses in
          internal controls; and
     b)   any fraud, whether or not material, that involves management or other
          employees who have a significant role in the registrant's internal
          controls; and

6)   The registrant's other certifying officer and I have indicated in this
     quarterly report whether or not there were significant changes in internal
     controls or in other factors that could significantly affect internal
     controls subsequent to the date of our most recent evaluation, including
     any corrective actions with regard to significant deficiencies and material
     weaknesses.

Dated:  July 31, 2003

                                                  By: /s/ Gregory D. Leiser
                                                      --------------------------
                                                  Name: Gregory D. Leiser
                                                  Title: Chief Financial Officer

                                       22