IDEXX LABORATORIES INC /DE
10-Q, 1996-07-26
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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<PAGE>   1


                                    FORM 10-Q

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549




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

For the quarterly period ended      JUNE 30, 1996
                                    -------------

                                                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:   0-19271
                          -------


                            IDEXX LABORATORIES, INC.
             (Exact name of registrant as specified in its charter)

              DELAWARE                                01-0393723
      (State of incorporation)             (I.R.S. Employer Identification No.)

       ONE IDEXX DRIVE, WESTBROOK, MAINE                 04092
    (Address of principal executive offices)           (Zip Code)

                                 (207) 856-0300
              (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 past 90 days.


Yes   X   No
    ----    ----

Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date.


As of July 24, 1996, 37,138,878 shares of the registrant's Common Stock, $.10
par value, were outstanding.



                                     Page 1

<PAGE>   2



                    IDEXX LABORATORIES, INC. AND SUBSIDIARIES

                                      INDEX



                                                                      Page

PART I -- FINANCIAL INFORMATION

Item 1.   Financial Statements:                                        3
          Consolidated Balance Sheets
          June 30, 1996 and December 31, 1995

          Consolidated Statements of Operations                        4
          Three and Six Months Ended
          June 30, 1996 and June 30, 1995

          Consolidated Statements of Cash Flows                        5
          Six Months Ended
          June 30, 1996 and June 30, 1995

          Notes to Consolidated Financial Statements                   6-9


Item 2.   Management's Discussion and Analysis of Financial           10-11
          Condition and Results of Operations


PART II -- OTHER INFORMATION


Item 1.   Legal Proceedings                                           12-13

Item 4.   Submission of Matters to a Vote of Security-Holders         13

Item 6.   Exhibits and Reports on Form 8-K                            14


SIGNATURES                                                            15



                                     Page 2

<PAGE>   3


PART I -- FINANCIAL INFORMATION

         Item 1. -- Financial Statements
                    --------------------

<TABLE>
                             IDEXX LABORATORIES, INC. AND SUBSIDIARIES
                                    CONSOLIDATED BALANCE SHEETS
                                            (UNAUDITED)

<CAPTION>
                                   ASSETS
                                                                    June 30,           December 31,
                                                                      1996                 1995
                                                                      ----                 ----
<S>                                                               <C>                 <C>
CURRENT ASSETS:
   Cash and cash equivalents                                      $139,408,462        $149,252,497
   Short-term investments                                           48,022,684          34,409,074
   Accounts receivable, less reserves of $3,179,000
      and $2,510,000 in 1996 and 1995, respectively                 59,540,881          44,091,136
   Inventories                                                      40,195,223          28,192,490
   Other current assets                                              8,648,210           6,034,503
                                                                  ------------        ------------
      Total current assets                                         295,815,460         261,979,700

LONG-TERM INVESTMENTS                                               10,466,300          13,625,890

PROPERTY AND EQUIPMENT, AT COST:
   Leasehold improvements                                           15,053,664          14,878,226
   Machinery and equipment                                          15,616,555          13,406,525
   Office furniture and equipment                                   15,048,649          10,615,208
   Construction in Progress                                          1,665,716           1,439,448
   Building                                                            388,075                  --
                                                                  ------------        ------------  
                                                                    47,772,659          40,339,407
   Less -- Accumulated depreciation & amortization                  17,797,580          14,843,799
                                                                  ------------        ------------
                                                                    29,975,079          25,495,608
OTHER ASSETS                                                        12,572,311          11,438,427
                                                                  ------------        ------------
                                                                  $348,829,150        $312,539,625
                                                                  ============        ============

                           LIABILITIES AND STOCKHOLDERS' EQUITY

CURRENT LIABILITIES:
   Accounts payable                                               $ 23,396,351        $ 10,807,092
   Accrued expenses                                                 21,390,764          16,656,872
   Notes payable                                                            --           1,687,433
   Deferred revenue                                                  5,223,567           4,263,550
                                                                  ------------        ------------
      Total current liabilities                                     50,010,682          33,414,947

COMMITMENTS AND CONTINGENCIES (Note 4)

STOCKHOLDERS' EQUITY:
   Common stock, $0.10 par value
      Authorized 60,000,000 shares
      Issued and outstanding 36,953,424 shares in 1996
         and 36,548,596 shares in 1995                               3,695,342           3,654,860
Additional paid-in capital                                         236,138,511         230,805,959
Retained earnings                                                   60,075,037          45,221,905
Cumulative translation adjustment                                   (1,090,422)           (558,046)
                                                                  ------------        ------------
   Total stockholders' equity                                      298,818,468         279,124,678
                                                                  ------------        ------------
                                                                  $348,829,150        $312,539,625
                                                                  ============        ============
</TABLE>


          See accompanying notes to consolidated financial statements.


                                     Page 3

<PAGE>   4

<TABLE>

                                 IDEXX LABORATORIES, INC. AND SUBSIDIARIES
                                   CONSOLIDATED STATEMENTS OF OPERATIONS
                                                 (UNAUDITED)
<CAPTION>

                                          Three Months Ended                    Six Months Ended
                                          ------------------                    ----------------
                                       June 30,         June 30,            June 30,         June 30,
                                        1996              1995                1996             1995
                                        ----              ----                ----             ----

<S>                                  <C>               <C>                 <C>              <C>
Revenue                              $65,875,210       $46,501,555         $123,275,066     $85,675,756


Cost of revenue                       28,579,930        19,540,742           53,086,914      35,737,153
                                     -----------       -----------         ------------     -----------

   Gross Profit                       37,295,280        26,960,813           70,188,152      49,938,603

Expenses:
   Sales and marketing                16,018,957        11,896,774           31,730,068      22,341,726
   General and administrative          7,107,499         4,376,276           11,940,037       8,154,163
   Research and development            3,091,131         2,723,364            5,900,626       5,184,718
                                     -----------       -----------         ------------     -----------
    Income from operations            11,077,693         7,964,399           20,617,421      14,257,996
Interest income, net                   2,300,937           579,013            4,557,379       1,159,606
                                     -----------       -----------         ------------     -----------
   Net income before provision for
    income taxes                      13,378,630         8,543,412           25,174,800      15,417,602
Provision for income taxes             5,485,238         3,599,000           10,321,668       6,439,000
                                     -----------       -----------         ------------     -----------

   Net income                        $ 7,893,392       $ 4,944,412           14,853,132       8,978,602
                                     ===========       ===========         ============     ===========

Net income per common and
 common equivalent share                   $0.20             $0.15               $0.38            $0.27
                                     ===========       ===========         ===========      ===========

Weighted average number of
  common and common equivalent
    shares outstanding                39,288,396        33,957,246          39,321,556       33,878,445
                                     ===========       ===========         ===========      ===========


</TABLE>



          See accompanying notes to consolidated financial statements.


                                     Page 4


<PAGE>   5

<TABLE>

                                   IDEXX LABORATORIES, INC. AND SUBSIDIARIES
                                     CONSOLIDATED STATEMENTS OF CASH FLOWS
                                                  (UNAUDITED)
<CAPTION>

                                                                       Six Months Ended
                                                                  June 30,            June 30,
                                                                    1996                1995
                                                                    ----                ----

<S>                                                              <C>                 <C>
Cash Flows from Operating Activities:
 Net income                                                      $ 14,853,132        $ 8,978,602
 Adjustments to reconcile net income to net cash
  provided by operating activities -
   Depreciation and amortization                                    3,543,383          2,725,010
   Changes in assets and liabilities -
     Accounts receivable                                          (14,199,299)        (8,400,709)
     Inventories                                                  (12,002,733)        (6,628,162)
     Other current assets                                          (2,438,665)        (1,114,253)
     Accounts payable                                              11,613,211          5,010,933
     Accrued expenses                                               2,556,941          3,128,953
     Deferred revenue                                                 960,017          1,273,321
                                                                 ------------        -----------
       Net cash provided by
        operating activities                                        4,885,987          4,973,695
                                                                 ------------        -----------

Cash Flows from Investing Activities:
 Purchases of property and equipment                               (5,475,757)        (8,623,246)
 Decrease (increase) in investments, net                          (10,454,020)         8,464,435
 Decrease in other assets                                             617,914             37,105
 Acquisitions (see Note 5)                                         (2,571,384)        (3,500,000)
                                                                 ------------        -----------
  Net cash used in investing activities                           (17,883,247)        (3,621,706)
                                                                 ------------        -----------

Cash Flows from Financing Activities:
 Proceeds from (repayment of) notes payable                        (1,687,433)         1,687,433
 Proceeds from the exercise of stock options                        5,373,034          2,537,795
                                                                 ------------        -----------
  Net cash provided by financing activities                         3,685,601          4,225,228
                                                                 ------------        -----------

Net Effect of Foreign Currency Translation                           (532,376)           699,008
                                                                 ------------        -----------
Net Increase (decrease) in Cash and Cash Equivalents               (9,844,035)         6,276,225

Cash and Cash Equivalents, beginning of period                    149,252,497         25,178,539
                                                                 ------------        -----------
Cash and Cash Equivalents, end of period                          139,408,462        $31,454,764
                                                                 ============        ===========

Supplemental Disclosure of Cash Flow Information:
   Interest paid during the period                               $    126,700        $    11,901
                                                                 ============        ===========
   Income taxes paid during the period                           $  6,744,400        $ 5,126,321
                                                                 ============        ===========
                                                                                
</TABLE>


          See accompanying notes to consolidated financial statements.


                                     Page 5

<PAGE>   6


                    IDEXX LABORATORIES, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (UNAUDITED)



1.   BASIS OF PRESENTATION

     The unaudited financial statements included herein have been prepared by
     IDEXX Laboratories, Inc. and subsidiaries (the "Company") pursuant to the
     rules and regulations of the Securities and Exchange Commission and
     include, in the opinion of management, all adjustments which the Company
     considers necessary for a fair presentation of such information. The
     December 31, 1995 Balance Sheet was derived from the audited Consolidated
     Balance Sheets contained in the Company's latest stockholders' annual
     report. Certain information and footnote disclosures normally included in
     financial statements prepared in accordance with generally accepted
     accounting principles have been condensed or omitted pursuant to such rules
     and regulations. These statements should be read in conjunction with the
     Company's audited consolidated financial statements and notes thereto which
     are contained in the Company's latest stockholders' annual report. The
     results for the interim periods presented are not necessarily indicative of
     results to be expected for the full fiscal year.

2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
     
     The accompanying consolidated financial statements reflect the application
     of certain accounting policies described in this and other notes to the
     consolidated financial statements.

     a.   Principles of Consolidation: The accompanying consolidated financial
          statements include the accounts of the Company and its wholly-owned
          subsidiaries. All material intercompany transactions and balances have
          been eliminated in consolidation.

     b.   Certain reclassifications have been made in the 1995 consolidated
          financial statements to conform with the current years presentation.

     c.   The Company adopted Statement of Financial Accounting Standards No.
          115 "Accounting for Certain Investments in Debt and Equity Securities"
          (SFAS No. 115) effective January 1, 1994. Accordingly, the Company's
          cash equivalent and short-term investments are classified as
          held-to-maturity and are recorded at amortized cost which approximates
          market value.
<TABLE>

          Cash Equivalents and Short-term Investments: Cash equivalents are
          short-term, highly liquid investments with original maturities of less
          than three months. Short-term investments are investment securities
          with original maturities of greater than three months but less than
          one year and consist of the following:
                  
                  <S>                                   <C>
                  Municipal bonds                       $ 9,500,000
                  U.S. Treasury bills                    38,522,684
                                                        -----------
                                                        $48,022,684
                                                        ===========
</TABLE>

<TABLE>
<CAPTION>

          Long-term investments are investment securities with original
          maturities of greater than one year and consist of the following:
                  
                  <S>                                   <C>
                  Municipal bonds                       $ 6,426,612
                  U.S. Treasury note                      4,039,688
                                                        -----------
                                                        $10,466,300
                                                        ===========
</TABLE>


                                     Page 6

<PAGE>   7

<TABLE>

     d.   Inventories include material, labor and overhead, and are stated at
          the lower of cost (first-in, first-out) or market. The components of
          inventories are as follows:
<CAPTION>

                                         June 30,           December 31,
                                           1996                 1995
                                           ----                 ----

           <S>                         <C>                  <C>
           Raw materials               $ 8,060,284          $ 5,058,199
           Work-in-process               5,033,363            4,393,946
           Finished goods               27,101,576           18,740,345
                                       -----------          -----------
                                       $40,195,223          $28,192,490
                                       ===========          ===========
</TABLE>


3.   NET INCOME PER SHARE

     Net income per common and common equivalent share is based on the weighted
     average number of common and common equivalent shares outstanding during
     each period, computed in accordance with the treasury stock method. Fully
     diluted net income per common and common equivalent share has not been
     presented as it is not significantly different.

4.   COMMITMENTS AND CONTINGENCIES

     From time to time the Company has received notices alleging that the
     Company's products infringe third-party proprietary rights. In particular,
     the Company has received notices claiming that certain of the Company's
     immunoassay products infringe third-party patents. Except as noted below
     with respect to the patent infringement suit brought by The Jewish Hospital
     of St. Louis, no litigation has been brought against the Company with
     respect to such claims. Patent litigation frequently is complex and
     expensive, and the outcome of patent litigation can be difficult to
     predict. There can be no assurance that the Company will prevail in any
     infringement proceedings that have been or may be commenced against the
     Company. A significant portion of the Company's revenue during the three
     month period ended June 30, 1996 was attributable to products incorporating
     certain immunoassay technologies and products relating to the diagnosis of
     canine heartworm infection. If the Company were to be precluded from
     selling such products or required to pay damages or make additional royalty
     or other payments with respect to such sales, the Company's business and
     results of operations could be materially and adversely affected.

     On February 4, 1993, the Company acquired Environetics, Inc.
     ("Environetics"), which brought a patent infringement suit with Stephen
     Edberg, Ph.D. against Millipore Corporation ("Millipore") in the U.S.
     District Court for the District of Connecticut on September 30, 1992 (the
     "Millipore I suit"). The complaint in the Millipore I suit was subsequently
     amended to add as additional plaintiffs Access Medical Systems, Inc., a
     subsidiary of the Company ("Access"), and Stephen C. Wardlaw, M.D. The
     primary relief sought by the plaintiffs is an injunction against Millipore
     which would prevent Millipore from selling a competitive product that the
     plaintiffs believe infringes U.S. Patent No. 4,925,789 (the " '789 Patent")
     covering the Company's Colilert product, under which Access and
     Environetics have an exclusive license from Drs. Edberg and Wardlaw.
     Millipore has filed a counterclaim alleging that the '789 Patent is invalid
     or not infringed.

     In addition, on July 26, 1995, the Company, Environetics, Access and Drs.
     Edberg and Wardlaw brought a second patent infringement suit against
     Millipore in the U.S. District Court for the District of Connecticut (the
     "Millipore II suit"). The principal relief sought by the plaintiffs in the
     Millipore II suit is an injunction against Millipore which would prevent
     Millipore from selling a product which the plaintiffs believe infringes
     U.S. Patent No. 5,429,933 (the " '933 Patent"), which also covers the
     Colilert product. The '933 Patent, which is related to the '789 Patent, was
     issued in July 1995 to Dr. Edberg. Access and Environetics have an
     exclusive license under the '933 Patent from Drs. Edberg and Wardlaw.
     Millipore has filed a counterclaim alleging that the '933 Patent is invalid
     or not infringed.

     If the plaintiffs do not prevail in the Millipore I and Millipore II suits
     (which have been consolidated for trial), the Company anticipates that the
     Colilert product would encounter increased competition, which could
     adversely affect sales of the Colilert product.


                                     Page 7

<PAGE>   8


     On February 24, 1995, CDC Technologies, Inc. ("CDC Technologies") filed
     suit against the Company in the U.S. District Court for the District of
     Connecticut. In its complaint, CDC Technologies alleges that the Company's
     conduct in, and its relationships with its distributors in connection with,
     the distribution of the Company's hematology products (i) violate federal
     and state antitrust statutes, (ii) violate Connecticut statutes regarding
     unfair trade practices, and (iii) constitute a civil conspiracy and
     interfere with CDC Technologies' business relations. The relief sought by
     CDC Technologies includes treble damages for antitrust violations as well
     as compensatory and punitive damages, and an injunction to prevent the
     Company from interfering with CDC Technologies' relations with
     distributors. The Company has filed an answer denying the allegations in
     CDC's complaint. Since discovery in this litigation is ongoing, the Company
     is unable to assess the likelihood of an adverse result or estimate the
     amount of any damages which the Company may be required to pay. Any adverse
     outcome resulting in the payment of damages would adversely affect the
     Company's results of operations.

     On May 26, 1995, The Jewish Hospital of St. Louis (the "Hospital") brought
     a suit against the Company which is currently pending in the U.S. District
     Court for the District of Maine for infringement of U.S. Patent No.
     4,839,275 issued June 13, 1989 (the " '275 Patent"). The '275 Patent, which
     is owned by the Hospital, claims certain methods and compositions for the
     diagnosis of canine heartworm infection. The primary relief sought by the
     Hospital is an injunction against the Company which would prevent the
     Company from selling canine heartworm diagnostic products which infringe
     the '275 Patent, as well as treble damages for past infringement. While the
     Company believes that it has meritorious defenses in this matter, since
     discovery is ongoing, the Company is unable to assess the likelihood of an
     adverse result or estimate the amount of any damages which the Company may
     be required to pay. If the Company is precluded from selling canine
     heartworm diagnostic products or required to pay damages or make additional
     royalty or other payments with respect to such sales, the Company's
     business and results of operations could be materially and adversely
     affected.

     On September 18, 1995, Purisys Inc. ("Purisys"), a producer of home
     pollution test kits, and certain of its employees filed suit against the
     Company in the Supreme Court of the state of New York. In their complaint,
     the plaintiffs allege that the Company has breached promises and made
     negligent misrepresentations, and has breached fiduciary and other duties.
     The plaintiffs are seeking damages in excess of $50,000,000. The Company
     purchased a 15% equity interest in Purisys in August 1994 for $616,000, and
     the Company subsequently advanced additional amounts to Purisys to purchase
     certain international distribution rights. In March 1995, the Company
     ceased advancing funds to Purisys, which filed for protection under Chapter
     11 of the Bankruptcy Code in July 1995. In May 1996, the court granted
     IDEXX's motion to dismiss the plaintiffs' suit, however the plaintiffs have
     requested the court to reconsider the dismissal and permit the plaintiffs
     to amend their complaint. While the Company believes it has meritorious
     defenses, since discovery has not yet commenced, the Company is unable to
     assess the likelihood of an adverse result or estimate the amount of any
     damages which the Company may be required to pay. Any adverse outcome
     resulting in the payment of damages would adversely affect the Company's
     results of operations.

5.   ACQUISITIONS

     The Company's consolidated results of operations include the results of
     operations of three veterinary reference laboratory businesses recently
     acquired by the Company for an aggregate purchase price of approximately
     $2.6 million in cash and the assumption of certain liabilities. In
     connection with these acquisitions, the Company entered into non-compete
     agreements for a period up to five years with certain of the entities,
     shareholders or former shareholders, and may become obligated to pay
     additional compensation to management of these companies based on achieving
     certain operating results. The Company has accounted for these acquisitions
     under the purchase method of accounting. The results of operations of each
     of the laboratories has been included in the Company's consolidated results
     of operations of the Company since each of their respective dates of
     acquisition. The Company has not presented pro forma financial information
     relating to any of these acquisitions because of immateriality. These
     acquisitions are as follows:


                                     Page 8

<PAGE>   9


          -    On March 29, 1996, the Company acquired all of the capital stock
               of VetLab, Inc., which operates two veterinary reference
               laboratories in Texas.

          -    On April 2, 1996, the Company, through its wholly-owned U.K.
               subsidiary, acquired substantially all of the assets and assumed
               certain of the liabilities of Grange Laboratories Ltd. Grange
               Laboratories' business, which includes three veterinary reference
               laboratories in the United Kingdom, is now operated as a division
               of IDEXX Laboratories, Limited.

          -    On May 15, 1996, the Company acquired all of the capital stock of
               Veterinary Services, Inc., which operates veterinary reference
               laboratories in Colorado, Illinois and Oklahoma.

6.   SUBSEQUENT EVENTS

     On July 12, 1996, the Company acquired substantially all of the assets and
     assumed certain of the liabilities of Consolidated Veterinary Diagnostics,
     Inc. ("CVD") for approximately $17 million in cash and notes. In addition,
     the Company may be required to make further payments to CVD of up to $3.0
     million based on operating results for the year ended July 31, 1997. As a
     result of the CVD acquisition, the Company is now operating CVD's
     veterinary reference laboratories in Northern California, Oregon and
     Nevada. In connection with the acquisition, the Company entered into
     five-year non-compete agreements with CVD and the shareholders of CVD. The
     Company will account for this acquisition under the purchase method of
     accounting.

     On July 18, 1996, the Company acquired all of the capital stock of Ubitech
     Aktiebolag ("Ubitech") for approximately $400,000 in cash. Ubitech, located
     in Uppsala, Sweden manufactures and distributes diagnostic kits for the
     livestock industry. The Company will account for this acquisition under the
     purchase method of accounting.

     On July 17, 1996 the Company signed a definitive merger agreement to
     acquire Idetek, Inc. ("Idetek") for IDEXX common stock valued at
     approximately $20 million, less certain adjustments. Idetek, located in
     Sunnyvale, California, manufactures and distributes diagnostic tests for
     food, agricultural and environmental industries. The exact number of shares
     of IDEXX stock to be issued will be determined at the closing. Completion
     of this acquisition is subject to various conditions, including approval by
     Idetek's shareholders. The Company intends to treat this merger as a
     pooling-of-interests transaction.



                                     page 9


<PAGE>   10


     Item 2.

                    IDEXX LABORATORIES, INC. AND SUBSIDIARIES
           MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
                            AND RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

Total revenue for the second quarter of 1996 increased 42% to $65.9 million from
$46.5 million for the second quarter of 1995. Total revenue for the six months
ended June 30, 1996 increased 44% to $123.3 million from $85.7 million for the
first six months of 1995.

The increase in total revenue for the quarter ended June 30, 1996 compared to
the same period in 1995 was principally attributable to increased unit sales of
veterinary clinical chemistry and hematology consumables and instruments, test
kits for feline viruses, and sales of veterinary laboratory services resulting
from recent acquisitions of veterinary reference laboratories. The increase in
revenue for the six-month period ended June 30, 1996 as compared to the same
period in the prior year was attributable to increases in the products noted
above, canine test products, and the introduction of a quantitative thyroid
instrument. Other important contributors to revenue growth in the first half of
1996 compared to the same period in 1995 included an instrument system to test
cleaning effectiveness in food processing plants. Price increases in certain
veterinary clinical products also contributed to the increase in revenue.

International revenue increased 40% to $23.2 million in the second quarter of
1996, and 47% to $43.3 million for the six months ended June 30, 1996, compared
to $16.5 million and $29.5 million, respectively, for the prior year periods.
Increased revenue in Europe, which included revenues of Grange Laboratories
acquired in the current quarter, accounted for 34% and 52%, and increased
revenue in Japan accounted for 48% and 31%, of the increase in international
revenues for the three- and six-month periods ended June 30, 1996, respectively,
compared to the same periods in 1995. The remaining increase is primarily
attributable to increased revenues in Canada, Australia, and Asia. Revenue from
the Company's European subsidiaries, transacted in local currencies, increased
approximately 25% and 37% for the three- and six-month periods ended June 30,
1996, respectively, as compared to the same periods in 1995. In U.S. dollars,
the revenue increase was 18% to $14.8 million for the current three-month period
and 32% to $29.6 million for current six-month period.

Gross profit as a percentage of revenue was 57% for the three- and six-month
periods ended June 30, 1996 and 58% for the same periods in 1995. Higher selling
prices for certain veterinary clinical products were offset by product mix, as
revenue growth of lower margin consumables exceeded the revenue growth in higher
margin diagnostic kit products, and by the impact of lower margins generated by
the recently acquired veterinary reference laboratories.

Sales and marketing expenses were 24% and 26% of revenue for the three- and
six-month periods ended June 30, 1996, respectively, compared to 26% for the
same periods in 1995. The decrease as a percentage of revenue for the three
months ended June 30, 1996 in comparison to the same period in 1995 was
principally attributable to the current quarter sales growth in Japan and the
acquisition of veterinary reference laboratories, which have lower sales and
marketing expenses as a percentage of revenue. The increases of $4.1 million and
$9.4 million for the three- and six-month periods ended June 30, 1996,
respectively, over the same periods in the prior year were principally
attributable to additional personnel in sales functions worldwide.

Research and development expenses were 5% of revenue for the three- and
six-month periods ended June 30, 1996 compared to 6% for the same periods in
1995. In dollars, such expenses increased 14% for the three- and six-month
periods ended June 30, 1996, respectively, as compared to the same period in
1995, reflecting additional resources and related overhead to support product
development.

General and administrative expenses were 11% and 10% of revenue for the three-
and six-month periods ended June 30, 1996, respectively, compared to 9% and 10%,
respectively, for the same periods in the prior year. The increase as a
percentage of revenue for the three months ended June 30, 1996 in comparison to
the same period in 1995 is principally attributable to higher legal expenses,
acquisition costs and the acquisition of veterinary reference laboratories which
have higher general and administrative costs as a percent of revenue.



                                    Page 10

<PAGE>   11


Net interest income was $2.3 million and $4.6 million for the three- and
six-month periods ended June 30, 1996 as compared to $579,000 and $1,160,000 for
the same periods in 1995. The increase in interest income is due to higher
invested cash balances, due in large part to a public stock offering in
September 1995 that generated approximately $153.0 million in net proceeds.

The Company's effective tax rate was 41% for the three- and six-month periods
ended June 30, 1996 compared to 42% for the same periods in 1995. The decrease
in the effective tax rate is principally attributable to lower state income
taxes.

LIQUIDITY AND CAPITAL RESOURCES

As of June 30, 1996, the Company had cash, cash equivalents, and short-term
investments of $187.4 million and $245.8 million of working capital.

The Company's consolidated results of operations include the results of
operations of three veterinary reference laboratory businesses recently acquired
by the Company for an aggregate purchase price of approximately $2.6 million in
cash and the assumption of certain liabilities. The Company has accounted for
these acquisitions under the purchase method of accounting. The results of
operations have been included in the Company's consolidated results of
operations since each of their dates of acquisition. The Company has not
presented pro forma financial information relating to any of these acquisitions
because of immateriality.

The Company believes that current cash and short-term investments, which include
net proceeds from the offering of the Company's Common Stock in 1995, and funds
expected to be generated from operations, will be sufficient to fund the
Company's operations for the foreseeable future.



                                    Page 11

<PAGE>   12


PART II -- OTHER INFORMATION


     Item 1. -- Legal Proceedings
                -----------------

     On February 4, 1993, the Company acquired Environetics, Inc.
     ("Environetics"), which brought a patent infringement suit with Stephen
     Edberg, Ph.D. against Millipore Corporation ("Millipore") in the U.S.
     District Court for the District of Connecticut on September 30, 1992 (the
     "Millipore I suit"). The complaint in the Millipore I suit was subsequently
     amended to add as additional plaintiffs Access Medical Systems, Inc., a
     subsidiary of the Company ("Access"), and Stephen C. Wardlaw, M.D. The
     primary relief sought by the plaintiffs is an injunction against Millipore
     which would prevent Millipore from selling a competitive product that the
     plaintiffs believe infringes U.S. Patent No. 4,925,789 (the " '789 Patent")
     covering the Company's Colilert product, under which Access and
     Environetics have an exclusive license from Drs. Edberg and Wardlaw.
     Millipore has filed a counterclaim alleging that the '789 Patent is invalid
     or not infringed.

     In addition, on July 26, 1995, the Company, Environetics, Access and Drs.
     Edberg and Wardlaw brought a second patent infringement suit against
     Millipore in the U.S. District Court for the District of Connecticut (the
     "Millipore II suit"). The principal relief sought by the plaintiffs in the
     Millipore II suit is an injunction against Millipore which would prevent
     Millipore from selling a product which the plaintiffs believe infringes
     U.S. Patent No. 5,429,933 (the " '933 Patent"), which also covers the
     Colilert product. The '933 Patent, which is related to the '789 Patent, was
     issued in July 1995 to Dr. Edberg. Access and Environetics have an
     exclusive license under the '933 Patent from Drs. Edberg and Wardlaw.
     Millipore has filed a counterclaim alleging that the '933 Patent is invalid
     or not infringed.

     If the plaintiffs do not prevail in the Millipore I and Millipore II suits
     (which have been consolidated for trial), the Company anticipates that the
     Colilert product would encounter increased competition, which could
     adversely affect sales of the Colilert product.

     On February 24, 1995, CDC Technologies, Inc. ("CDC Technologies") filed
     suit against the Company in the U.S. District Court for the District of
     Connecticut. In its complaint, CDC Technologies alleges that the Company's
     conduct in, and its relationships with its distributors in connection with,
     the distribution of the Company's hematology products (i) violate federal
     and state antitrust statutes, (ii) violate Connecticut statutes regarding
     unfair trade practices, and (iii) constitute a civil conspiracy and
     interfere with CDC Technologies' business relations. The relief sought by
     CDC Technologies includes treble damages for antitrust violations as well
     as compensatory and punitive damages, and an injunction to prevent the
     Company from interfering with CDC Technologies' relations with
     distributors. The Company has filed an answer denying the allegations in
     CDC's complaint. Since discovery in this litigation is ongoing, the Company
     is unable to assess the likelihood of an adverse result or estimate the
     amount of any damages which the Company may be required to pay. Any adverse
     outcome resulting in the payment of damages would adversely affect the
     Company's results of operations.

     On May 26, 1995, The Jewish Hospital of St. Louis (the "Hospital") brought
     a suit against the Company which is currently pending in the U.S. District
     Court for the District of Maine for infringement of U.S. Patent No.
     4,839,275 issued June 13, 1989 (the " '275 Patent"). The '275 Patent, which
     is owned by the Hospital, claims certain methods and compositions for the
     diagnosis of canine heartworm infection. The primary relief sought by the
     Hospital is an injunction against the Company which would prevent the
     Company from selling canine heartworm diagnostic products which infringe
     the '275 Patent, as well as treble damages for past infringement. While the
     Company believes that it has meritorious defenses in this matter, since
     discovery is ongoing, the Company is unable to assess the likelihood of an
     adverse result or estimate the amount of any damages which the Company may
     be required to pay. If the Company is precluded from selling canine
     heartworm diagnostic products or required to pay damages or make additional
     royalty or other payments with respect to such sales, the Company's
     business and results of operations could be materially and adversely
     affected.


                                    Page 12

<PAGE>   13


     On September 18, 1995, Purisys Inc. ("Purisys"), a producer of home
     pollution test kits, and certain of its employees filed suit against the
     Company in the Supreme Court of the state of New York. In their complaint,
     the plaintiffs allege that the Company has breached promises and made
     negligent misrepresentations, and has breached fiduciary and other duties.
     The plaintiffs are seeking damages in excess of $50,000,000. The Company
     purchased a 15% equity interest in Purisys in August 1994 for $616,000, and
     the Company subsequently advanced additional amounts to Purisys to purchase
     certain international distribution rights. In March 1995, the Company
     ceased advancing funds to Purisys, which filed for protection under Chapter
     11 of the Bankruptcy Code in July 1995. In May 1996, the court granted
     IDEXX's motion to dismiss the plaintiffs' suit, however the plaintiffs have
     requested the court to reconsider the dismissal and permit the plaintiffs
     to amend their complaint. While the Company believes it has meritorious
     defenses, since discovery has not yet commenced, the Company is unable to
     assess the likelihood of an adverse result or estimate the amount of any
     damages which the Company may be required to pay. Any adverse outcome
     resulting in the payment of damages would adversely affect the Company's
     results of operations.

     Item 4 -- Submission of Matters to a Vote of Security-Holders
               ---------------------------------------------------

<TABLE>

At the Company's Annual Meeting of Stockholders held on May 24, 1996, the
following proposals were adopted by the votes specified below:

<CAPTION>
                                                                                                                        
                                                                                                    BROKER              
                PROPOSAL                              FOR            AGAINST        ABSTAIN        NON-VOTES
- ----------------------------------------         -------------    -------------   -----------    ------------
<S> <C>                                           <C>              <C>             <C>              <C> 
1.  Election of two Class II Directors:

         John R. Hesse                            31,320,427          67,414             0                0

         Kenneth Paigen, Ph.D.                    31,320,427          67,414             0                0



2.  Approval of the amendment to the
    Company's 1991 Stock Option Plan
    increasing from 5,500,000 to
    6,475,000 the number of shares of
    Common Stock authorized for
    issuance under the plan.                      23,000,215       8,044,974       176,044          166,608


3.  Ratification of Arthur Andersen LLP
    as auditors.                                  31,353,343          17,639        16,859                0


</TABLE>


                                    Page 13


<PAGE>   14


<TABLE>

     Item 6.  --   Exhibits and Reports on Form 8-K
                   --------------------------------
<CAPTION>

     (a)      Exhibits                                                                                          Page
                                                                                                                ----
   <S>        <C>                                                                                                <C>
   **10.1     Fourth Amendment to Supply Agreement, effective as of January 1, 1996, between the                 16
              Company and Johnson & Johnson Clinical Diagnostics, Inc.

     21.      Subsidiaries of the Company.                                                                       28

     99.1     Schedules A and C to Technology License and Distributor Agreement, dated January 4, 1991,          29
              by and between the Company and Baxter Diagnostics Inc.* (previously filed as Exhibit 15.10
              to the Company's Registration Statement on Form S-1 (File No. 33-40447), which is
              incorporated herein by reference).

     (b)      Reports on Form 8-K

              The Company filed no reports on Form 8-K during the fiscal quarter for which this report is filed.


<FN>

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

*        Confidential treatment previously granted as to certain portions.
**       Confidential treatment requested as to certain portions.
</TABLE>


                                    page 14

<PAGE>   15




                                   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.


                                     IDEXX LABORATORIES, INC.

Date:  July 26, 1996



                                     /s/ Merilee Raines
                                     ---------------------------------------
                                     Merilee Raines, Vice President of Finance
                                     (Principal Financial Officer and Principal
                                     Accounting Officer)


                                    Page 15


<PAGE>   1
                                        CONFIDENTIAL MATERIAL OMITTED AND FILED
                                    SEPARATELY WITH THE SECURITIES AND EXCHANGE
                                               COMMISSION (# Denotes Omissions)


                                 EXHIBIT 10.1

                Fourth Amendment to the IDEXX Laboratories, Inc.
                and Johnson & Johnson Clinical Diagnostics, Inc.
               (as successor in interest to Eastman Kodak Company)
        Supply Agreement dated January 15, 1992 (the "Supply Agreement")

This Amendment (the "Amendment") is effective as of January 1, 1996, by and
between Johnson & Johnson Clinical Diagnostics, Inc., a New York corporation
with offices at 100 Indigo Creek Drive, Rochester, N.Y. ("JJCD"), and IDEXX
Laboratories, Inc., a Delaware corporation, with offices at One IDEXX Drive,
Westbrook, Maine, 04092 ("IDEXX").

WHEREAS JJCD and IDEXX desire to amend the Supply Agreement, as amended on
November 16, 1993, November 19, 1993 and March 15, 1994 (such amendments are
collectively referred to as the "Original Amendments") as provided herein:

NOW, THEREFORE, in consideration of the premises and the mutual agreements
contained herein, the parties hereto agree as follows:

1. All references to the Eastman Kodak Company or Kodak shall be deemed to be
replaced by reference to Johnson & Johnson Clinical Diagnostics Systems, Inc. or
JJCD.

2. All references to EKTACHEM slides shall be deemed to be replaced by reference
to VITROS slides.

3. Each of the Original Amendments, including the Schedules thereto, is hereby
superseded by this Amendment and shall hereafter be null and void and of no
further effect.

4. In Clause 1, the definition of "the Term" is hereby deleted in its entirety
and replaced with the following:

     "The period from the Commencement date until December 31, 2006."

5. In Clause 1, insert the following terms:

   "Applicable Percentage"         The percentage for each Corresponding Slide 
                                   as set forth on Schedule 9, as revised 
                                   pursuant to sub-Clause 7.04 below.

   "Benchmark"                     The Weighted Average List Price as set forth
                                   on Schedule 9, as it may be revised pursuant
                                   to sub-Clause 7.04. 



<PAGE>   2

   "Corresponding Slide"           Any VITROS slide which provides the same 
                                   blood chemistry measurement as a particular 
                                   VETTEST slide (e.g., a DT60 Glucose slide is
                                   a Corresponding Slide for a VETTEST Glucose 
                                   slide).

   "the PANELS/PROFILES"           Packages of VETTEST slides consisting of two
                                   or more sets of slides of specified 
                                   chemistries. The initial PANEL and the
                                   initial PROFILES shall consist of the slides
                                   set forth on Schedule 6 attached hereto, with
                                   any changes or additional PANELS/PROFILES to
                                   be mutually agreed upon by the parties as 
                                   specified in Schedule 6.

   "Weighted Average List Price"   As set forth on Schedule 9, as it may be 
                                   revised pursuant to sub-Clause 7.04.

6. In sub-Clause 4.01, in the third line after the words "the VETTEST slides"
insert the words ", including slides packaged as PANELS/PROFILES,".

7. Clause 5 is hereby deleted in its entirety and replaced with the following:

   5.     FORECASTS, COMMITMENTS AND ORDERS
          ---------------------------------

   5.01   Attached hereto as Schedule 7 are Purchase Forecasts and Purchase
          Commitments by IDEXX for VETTEST slides, including slides packaged as
          PANELS/PROFILES, for the period 1996 to 2006. The Purchase Forecasts
          constitute non-binding forecasts which shall be the basis for
          determining IDEXX's eligibility for rebates pursuant to sub-Clause
          7.03 below. The Purchase Commitments constitute IDEXX's anticipated
          minimum purchase quantities for single chemistry VETTEST slides and
          PANELS/PROFILES slides in the indicated calendar years. For calendar
          years beginning with 1999, IDEXX shall provide to JJCD the anticipated
          Purchase Forecasts and Purchase Commitments by type of VETTEST slides
          (single chemistry or PANELS/PROFILES) at least two years in advance,
          and upon receipt by JJCD such Purchase Forecasts and Purchase
          Commitments shall be deemed to be incorporated into Schedule 7. The
          total single and PANEL/PROFILE slides reflected in such updated
          Purchase Forecasts and Purchase Commitments shall be equal to the
          respective totals set forth in Schedule 7. Failure by IDEXX to
          purchase at least the indicated Purchase Commitment quantities of each
          type of slides in any year may subject IDEXX to the requirement to
          make a payment to JJCD as set forth in sub-Clause 5.02 below, but such
          failure shall in no event be deemed to be a breach of this Agreement.

   5.02   If IDEXX fails to purchase the quantities of slides set forth as
          Purchase Commitments on Schedule 7 in a particular calendar year,
          unless there has been a Material Adverse Change" (as defined below)
          IDEXX shall pay to JJCD within 



                                       2

<PAGE>   3

          30 days after the end of such calendar year #########################
          #####################################################################
          #####################################################################
          ####################

          For the purposes of this sub-Clause 5.02, Material Adverse Changes
          shall mean material changes in the veterinary clinical chemistry
          markets which result from (a) non-invasive diagnostic testing other
          than any such testing which is introduced by IDEXX, (b) invasive
          diagnostic testing other than any such testing which is introduced by
          IDEXX, (c) the eradication of one or more diseases, or the development
          of new disease therapies, treatments or diagnostics, which
          significantly reduces demand for veterinary clinical chemistry
          testing, (d) decreased commitment by or ability of Johnson & Johnson
          to supply VETTEST or VITROS slides, and (e) the availability in one or
          more significant markets of slides compatible with the VETTEST
          analyzer from sources other than IDEXX, which availability is not
          promptly enjoined or otherwise terminated by JJCD.

          The parties shall discuss in good faith any assertion by IDEXX that a
          Material Adverse Change has occurred or is continuing. If the parties
          agree that a Material Adverse Change has occurred or is continuing,
          they shall negotiate in good faith with respect to appropriate
          reductions in Purchase Commitments, VETTEST slide prices (including
          single and PANELS/PROFILES slides) and/or amounts which would
          otherwise be payable pursuant to the first sentence of this sub-Clause
          5.02 to appropriately allocate the effects of such Material Adverse
          Change on the parties.

   5.03   IDEXX shall place orders for slides at least three calendar months 
          prior to the required delivery date. Unless otherwise agreed between
          the parties in any particular case, orders for slides shall be placed
          by IDEXX three times per year and each order shall specify a business
          day delivery date for each delivery.

   5.04   Not later than October 1 of each calendar year commencing with 1996, 
          IDEXX shall notify JJCD of quantity requirements for the subsequent
          year for each of the VETTEST slides, and IDEXX order quantities in the
          subsequent year for each of the VETTEST slides shall be within
          +/- 25% of such notification unless the parties otherwise agree. As 
          long as slide orders are within the indicated range of +/- 25% of 
          the applicable notification, JJCD shall deliver the slides in
          accordance with the orders.

   5.05   In the event that IDEXX in any year notifies JJCD that it wishes to 
          order quantities which exceed the quantities mentioned in sub-Clause
          5.04 above by more than 25%, JJCD will endeavor to supply the excess
          quantities and notify IDEXX of the extent of its ability to so supply.



                                       3

<PAGE>   4

    5.06  It is understood and agreed that orders for the VETTEST slides shall 
          include only those chemistries set forth in Schedule 8 hereto. In the
          event that a chemistry listed in Schedule 8 should become known by
          JJCD to be unavailable at any future date during the Term, JJCD will
          so notify IDEXX at the earliest practicable date and will cooperate
          with IDEXX to ameliorate the possible adverse effects upon IDEXX of
          such unavailability.

    5.07  Order and delivery of VETTEST slides (including PANELS/PROFILES) shall
          be made in multiples of 100 boxes. The number of orders and deliveries
          shall be limited to three in each year unless otherwise agreed to in
          writing by the parties. Order and delivery of the VETTEST tips shall
          be made in multiples of 10,000 tips (20 cartons each containing 500
          tips). The number of orders and deliveries of the VETTEST tips and
          Vetrols shall be limited to two in each year. JJCD shall deliver the
          VETTEST tips and Vetrols in the ordered quantities in each year.

8.  Sub-Clause 6.02 is deleted in its entirety and is replaced by the following:

          "6.02. Order and delivery for all purchases hereunder shall be FOB
          Rochester, New York."

9.  Sub-Clause 6.03 is amended by deleting the first sentence thereof in its
entirety.

10. Clause 7 is hereby deleted in its entirety and is replaced by the following:

    7.    PRICES
          ------

    7.01  The initial prices for each of the VETTEST slides (including the
          PANELS/PROFILES) shall be as set forth in Schedule 8 hereto. Such
          prices are broken out to provide prices for each individual product
          code for each of the three following geographic regions (additional
          regions may be added, and changes within regions may be agreed to,
          from time to time in writing by the parties):

               US--United States, Canada and all other countries not identified
               in this sub-Clause 7.01;

               European--Australia, Europe, New Zealand, South Africa;

               Asian--Brunei, China, Hong Kong, Indonesia, Japan, Korea,
               Malaysia, Philippines, Singapore, Taiwan, Thailand, Viet Nam.

          IDEXX agrees that JJCD may audit IDEXX books and records to verify
          sales of VETTEST slides in each region.

    7.02  The prices set forth in Schedule 8 shall remain in effect for orders 
          placed through December 31, 1996. Thereafter, the prices may be
          adjusted, subject to the next 


                                       4



<PAGE>   5

          sentence of this sub-Clause 7.02, effective as of January 1 of each
          year for orders placed on or after that date by an amount not to
          exceed ##############################################################
          ################################################## for the calendar 
          year since the immediately preceding price adjustment. Notwithstanding
          the preceding sentence, if the aggregate quantities of IDEXX's single
          slide and PANELS/PROFILES slide purchases exceed #### of the Purchase
          Forecasts for a particular year as set forth on Schedule 7, there
          shall be no price increase for the immediately succeeding year.

    7.03  In the event IDEXX purchases more than #### of the Purchase Forecasts
          for each of (i) single slides and (ii) PANELS/PROFILES slides, IDEXX
          shall be entitled to a credit rebate based on the amount by which
          IDEXX exceeds the Purchase Forecasts for each category (single or
          PANELS/PROFILES slides) as follows:

                    Purchases by Category          Rebate Schedule for total
                % above applicable Purchase        Category purchases above
                          Forecast               applicable Purchase Forecast

                             ####                              ####
                          #########                            ####
                          #########                            ####
                             ####                              ####

          Notwithstanding the termination or expiration of, or anything to the
          contrary in, this Agreement, IDEXX shall be entitled to receive a cash
          refund, rather than a credit rebate, from JJCD if IDEXX is entitled to
          a rebate pursuant to the preceding sentence immediately prior to the
          expiration or termination of this Agreement.

    7.04  JJCD agrees to provide to IDEXX on a regular basis during the Term 
          current list prices for all Corresponding Slides. Each revised
          Corresponding Slide price list shall be used by the parties to
          calculate an updated Weighted Average List Price for all Corresponding
          Slides. In the event that the Weighted Average List Price for
          Corresponding Slides is less than ### of the Benchmark in effect
          immediately prior to the effectiveness of the new Corresponding Slide
          price list, (i) all of the VETTEST single and PANELS/PROFILES slide
          prices to IDEXX shall be ############################################
          ##############################, effective for all orders after the new
          JJCD Corresponding Slide prices which give rise to the reduction in
          the Weighted Average List Price go into effect, and (ii) a new
          Benchmark shall be established at the new Weighted Average List Price.
          If IDEXX elects to add to, or delete from, the list of available
          VETTEST slides set forth on Schedule 8 one or more of the slide
          chemistries offered by JJCD, the parties agree to revise Schedule 9 as
          necessary to add or delete the appropriate Corresponding Slide(s) and
          its list price, and to recalculate the Applicable Percentages so that
          such percentages on the revised Schedule 9 reflect the actual unit
          volume sales percentages of each Corresponding Slide. Applicable


                                       5

<PAGE>   6

          Percentages of unit volume sales shall be determined based on JJCD's
          sales for its most recently completed fiscal quarter, and the sum of
          the Applicable Percentages shall always be 100%. In the case of any
          revision to Schedule 9, the Weighted Average List Price shall be
          recalculated by multiplying the Applicable Percentage for each
          Corresponding Slide by its list price and aggregating the total of
          such multiplication calculations.

          JJCD and IDEXX agree that IDEXX may request that a Big 6 accounting
          firm, other than the principal accounting firm of either party, audit
          JJCD's books and records to verify the Weighted Average List Price and
          actual unit volume sales of Corresponding Slides. Such auditor shall
          report to the parties only (a) JJCD's Weighted Average List Price and
          (b) the Applicable Percentage for each Corresponding Slide. The prices
          and percentages contained in such auditor's report shall be deemed to
          be the Weighted Average List Price and Applicable Percentages for
          Corresponding Slides, respectively, hereunder until modified in
          accordance with this sub-Clause 7.04. The fees and expenses of such
          auditor shall be borne equally by the parties.

    7.05  If JJCD is entitled to a price increase pursuant to sub-Clause 7.02 
          and IDEXX is entitled to a price decrease pursuant to sub-Clause 7.04,
          the net percentage increase or decrease in price shall be used to
          calculate slide prices for the next calendar year.

11. In Clause 9, insert the following as sub-Clause 9.09:

    9.09  JJCD shall use all commercially reasonable efforts to (i) ensure that
          neither VITROS slides (including without limitation VITROS slides to
          which bar coding for use in the VETTEST analyzer has been added) nor
          any other product manufactured by or for Johnson & Johnson is
          supplied, marketed, distributed or sold for use in the VETTEST
          analyzer and (ii) promptly enjoin or otherwise terminate any such
          supplying, marketing, distribution or sale. The commercial
          reasonableness of JJCD's efforts shall be determined solely with
          regard to the relationship between the parties set forth in this
          Agreement, and not with regard to JJCD's or Johnson & Johnson's
          business as a whole. Notwithstanding the foregoing, JJCD's obligation
          to use commercially reasonable efforts for the purposes of this
          sub-Clause 9.09 shall not include any obligation to reduce non-VETTEST
          VITROS slide prices.

          JJCD shall include a provision in future supply and distributor
          contracts that if a customer opens a mainframe slide cartridge and
          uses the slides individually, or otherwise repackages or modifies JJCD
          slides for a use other than for which the slides are sold by JJCD,
          such activity, if not ceased upon notice, shall give JJCD the right to
          terminate such contract. JJCD will exercise such right where the
          customer does not cease such activity after due notice. JJCD and IDEXX
          shall also reasonably cooperate in efforts to stop any such
          unauthorized slide 


                                       6

<PAGE>   7

          repackaging or modification, where the modified or repackaged slides
          are supplied, marketed or sold for use in VETTEST analyzer. The
          failure of JJCD to exert commercially reasonable efforts as
          contemplated by this sub-Clause 9.09 shall in no event be deemed to be
          a breach of this Agreement by JJCD but shall give IDEXX the right, as
          its exclusive remedy for such failure, to terminate any obligations it
          may have pursuant to sub-Clause 5.01, the first two of paragraphs of
          sub-Clause 5.02 and Schedule 7 of this Agreement, effective
          immediately upon written notice to JJCD.

12. In Clause 19, insert the following as sub-Clauses 19.03 and 19.04:

    19.03 JJCD shall have the right to terminate this Agreement upon five years'
          prior written notice to IDEXX in the event JJCD elects to cease the
          manufacture and sale of dry slide diagnostic products. The minimum
          purchase obligations of IDEXX shall terminate upon delivery of such a
          notice of termination.

    19.04 IDEXX shall have the right to terminate any obligations it may have 
          pursuant to sub-Clauses 5.01 and 5.02 and Schedule 7 of this Agreement
          upon prior written notice to JJCD of either (a) two full calendar
          years, if IDEXX commits to JJCD that IDEXX shall not supply competing
          clinical chemistry diagnostic products to the veterinarian's office
          market, or (b) four full calendar years. Upon the commencement of the
          first full calendar year of a notice period pursuant to the preceding
          sentence, sub-Clauses 7.03, 7.04 and 7.05 and the last sentence of
          sub-Clause 7.02 shall be terminated, except for any previously accrued
          obligation of JJCD to provide a credit rebate pursuant to sub-Clause
          7.03 for the immediately preceding calendar year.

13. Sub-Clause 29.01 is amended by deleting in their entirety the two addresses
for Eastman Kodak Company and replacing them with the following:

          Johnson & Johnson Clinical Diagnostics, Inc.
          100 Indigo Creek Drive
          Rochester, New York  14650
          For the attention of:  Vice President, Marketing

          with a copy to:
          Johnson & Johnson
          One Johnson & Johnson Plaza
          New Brunswick, New Jersey  08933
          For the attention of:  Office of General Counsel



                                       7


<PAGE>   8

14.  Clause 30 is hereby added to the Agreement as follows:

     30.  DISPUTES
          --------

          Any and all disputes, controversies or differences between the parties
          hereto arising out of or in relation to or in connection with this
          Agreement, or the breach hereof, which cannot be settled amicably
          through negotiations between the parties hereto, shall be submitted to
          and settled by arbitration. Such arbitration shall be conducted in New
          York, New York in accordance with the rules then obtaining of the
          American Arbitration Association ("AAA") by a panel of three
          arbitrators selected from the National Panel of Arbitrators of the
          AAA. If the parties cannot agree on three arbitrators, the AAA shall
          select one or more arbitrators as necessary to complete the panel.
          Reasonable discovery shall be permitted in connection with the
          arbitration proceeding, and the arbitrators shall apply the
          substantive laws of the State of New York except that the
          interpretation and enforcement of this arbitration provision shall be
          governed by the Federal Arbitration Act. Any award rendered in any
          such arbitration shall be final and binding upon both parties hereto
          and judgment upon the award rendered by the panel of arbitrators may
          be entered in any court having jurisdiction over the party against
          whom the award is to be enforced. Each party shall bear its own costs
          in connection with any such arbitration, and any costs of the
          arbitrators or the AAA shall be borne equally by the parties. The
          arbitrators shall have no authority to assess or award punitive,
          incidental or consequential damages, and each party hereby waives its
          rights to any such damages.

15. Schedules 6, 7, 8 and 9 to the Agreement are hereby deleted in their
entirety and replaced by Schedules 6, 7, 8 and 9 attached hereto.

16. Except as modified by this Fourth Amendment, all terms and conditions of the
Agreement shall continue in full force and effect.

IN WITNESS WHEREOF, each of the parties have caused this Agreement to be
executed by its duly authorized officer to be effective as of the date first
above written.

JOHNSON & JOHNSON CLINICAL         IDEXX LABORATORIES, INC.
DIAGNOSTICS, INC.


By: /s/  Jose Coronas              By: /s/  Brad R. MacKinnon
    ----------------------             ----------------------
Name:  Jose Coronas                    Brad R. MacKinnon
Title: President,                      President, Veterinary Products Division
       Johnson & Johnson
       Clinical Diagnostics




                                       8

<PAGE>   9

                                   SCHEDULE 6

                                 PANELS/PROFILES

The initial PANEL shall be the "Young Presurgical Panel" consisting of four sets
of the following six VETTEST slides:

BUN       Urea Nitrogen
ALT       Alanine aminotransferase
GLU       Glucose
TP        Total protein
CREA      Creatinine
ALKP      Alkaline phosphatase

The initial PROFILES shall be the "General Health Profile" and the "Large Animal
Profile", each consisting of two sets of 12 VETTEST slides as follows:

General Health Profile                  Large Animal Profile

ALB       Albumin                            ALB        Albumin
ALKP      Alkaline phosphatase               ALKP       Alkaline phosphatase
ALT(SGPT) Alanine aminotransferase           AST        AST
AMYL      Amylase                            Ca2+       Calcium
Ca2+      Calcium                            CK         CK
CHOL      Cholesterol                        GGT        Gamma GT
CREA      Creatinine                         GLU        Glucose
GLU       Glucose                            PHOS       Inorganic phosphate
PHOS      Inorganic phosphate                LDH        LDH
TBIL      Total bilirubin                    MG         Magnesium
TP        Total protein                      TP         Total Protein
BUN       Urea Nitrogen                      BUN        Urea Nitrogen

Packaging for the Young Presurgical Panels, the General Health Profiles and the
Large Animal Profiles has been previously agreed upon by the parties, and any
changes to the slide composition or packaging of the initial PANEL or the
initial PROFILES shall be negotiated in good faith and mutually agreed upon by
JJCD and IDEXX. The slide composition, packaging and initial pricing of any
additional PANELS/PROFILES shall be mutually agreed upon by JJCD and IDEXX.
Unless otherwise agreed by the parties in writing with respect to one or more
specific PANELS or PROFILES, all IDEXX purchases of VETTEST slides packaged as
PANELS/PROFILES shall be credited against the Purchase Forecasts and Purchase
Commitments for such slides under this Agreement.



                                       9

<PAGE>   10

<TABLE>
                                                           Schedule 7

                                         Purchase Forecasts and Purchase Commitments
<CAPTION>

                             1996        1997         1998     1999  2000  2001  2002  2003  2004  2005  2006
                             ----        ----         ----     ----  ----  ----  ----  ----  ----  ----  ----
<S>                      <C>     <C>  <C>     <C>  <C>    <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>
PURCHASE FORECASTS

                         Vol     %    Vol     %    Vol    %     Vol   Vol   Vol   Vol   Vol   Vol   Vol   Vol
                         ---     -    ---     -    ---    -     ---   ---   ---   ---   ---   ---   ---   ---
Single slides            ####  ####   ####  ####   ####  ###      *     *     *     *     *     *     *     *
Panel & Profile slides   ####  ####   ####  ####   ####  ###      *     *     *     *     *     *     *     *
- ----------------------   ----         ----         ----           -     -     -     -     -     -     -     -
Total slides             ####         ####         ####        ####  ####  ####  ####  ####  ####  ####  ####  


PURCHASE COMMITMENTS     

Single slides            ####         ####         ####           *     *     *     *     *     *     *     * 
Panel & Profile slides   ####         ####         ####           *     *     *     *     *     *     *     * 
- ----------------------   ----         ----         ----           -     -     -     -     -     -     -     -
Total Slides             ####         ####         ####        ####  ####  ####  ####  ####  ####  ####  ####


<FN>
* Category (single and PANEL/PROFILE) forecasts and commitments shall be provided by IDEXX as specified in 
  sub-Clause 5.01 of the Agreement.

</TABLE>




                                       10

<PAGE>   11

<TABLE>
                                                Schedule 8
                                           Products and Prices


<CAPTION>
Sales Region                                       US Sales          European Sales      Asian Sales
- ------------                                       --------          --------------      -----------

Customer Number                                    164 9706             314 8251           318 3258
                                              
                                                  US Pricing
                                                  ----------

Single slides (Bx 25)     Catalog Number   >1500 bxs*   <1500 bxs*   European Pricing    Asian Pricing
- ---------------------     --------------   ----------   ----------   ----------------    -------------
<S>                           <C>             <C>         <C>              <C>               <C>
Albumin                       822 7134        #####       #####            #####             #####
Alk Phos                      831 5459        #####       #####            #####             #####
ALT                           808 3750        #####       #####            #####             #####
Ammonia                       181 6842        #####       #####            #####             #####
Amylase                       820 8191        #####       #####            #####             #####
AST                           811 3979        #####       #####            #####             #####
Calcium                       804 8191        #####       #####            #####             #####
Cholesterol                   835 4888        #####       #####            #####             #####
CK                            835 8582        #####       #####            #####             #####
Creatinine                    818 3477        #####       #####            #####             #####
ECO2                          853 8670        #####       #####            #####             #####
Gamma GT                      826 1315        #####       #####            #####             #####
Glucose                       813 0536        #####       #####            #####             #####
LDH                           835 1082        #####       #####            #####             #####
Lipase                        196 6191        #####       #####            #####             #####
Magnesium                     108 0266        #####       #####            #####             #####
Phosphorus                    807 0856        #####       #####            #####             #####
Total Bilirubin               838 0396        #####       #####            #####             #####
Total Protein                 193 7093        #####       #####            #####             #####
Triglycerides                 192 2285        #####       #####            #####             #####
Urea Nitrogen                 150 7326        #####       #####            #####             #####
Uric Acid                     100 0793        #####       #####            #####             #####



Profile Slides (Bx 24)       Catalog Number   US Pricing   European Pricing    Asian Pricing
- ----------------------       --------------   ----------   ----------------    -------------
<S>                             <C>             <C>             <C>              <C>
General Health Profile          160 7175        ######          ######           ######
Young Presurgical Panel         801 5109        ######          ######           ######
Large Animal Profile            680 0071        ######          ######           ######



Other          Catalog Number   WW Pricing
- -----          --------------   ----------
<S>               <C>             <C>
Vetrols           869 9852        ######
Tips              175 7384        ######

<FN>
*  per chemistry per order

</TABLE>



                                       11


<PAGE>   12

<TABLE>
                           SCHEDULE 9

<CAPTION>

Test                       % of Total             List Price
- ----                       ----------             ----------
<S>                          <C>                    <C>
Albumin                      #####                  #####
Alk Phos                     #####                  #####
ALT (SGPT)                   #####                  #####
Ammonia                      #####                  #####
Amylase                      #####                  #####
AST (SGOT)                   #####                  #####
Bilirubin                    #####                  #####
BUN                          #####                  #####
Calcium                      #####                  #####
Cholesterol                  #####                  #####
CK (CPK)                     #####                  #####
CO2                          #####                  #####
Creatinine                   #####                  #####
GGT                          #####                  #####
Glucose                      #####                  #####
LDH                          #####                  #####
Lipase                       #####                  #####
Magnesium                    #####                  #####
Phosphorus                   #####                  #####
Total Protein                #####                  #####
Triglycerides                #####                  #####
Uric Acid                    #####                  #####
- ---------
Weighted Average             #####                  #####
List Price 
(per box of 25 slides)

</TABLE>





                                       12

<PAGE>   1
                                   EXHIBIT 21

                           SUBSIDIARIES OF THE COMPANY



         Name                                Jurisdiction of Incorporation
         ----                                -----------------------------

Access Medical Systems, Inc.                           Delaware

Cardiopet Incorporated                                 Delaware

Environetics, Inc.                                     Delaware

ETI Corporation                                        Delaware

IDEXX Laboratories Foreign Sales Corporation           U.S. Virgin Islands

IDEXX GmbH                                             Germany

IDEXX LABORATORIES PTY. LIMITED                        Australia

IDEXX Laboratories, Limited                            England and Wales

IDEXX Laboratories, KK                                 Japan

IDEXX S.A.                                             France

IDEXX Laboratories Canada Corporation                  Canada

IDEXX Laboratories B.V.                                The Netherlands

IDEXX Logistique et Scientifique Europe S.A.           France

IDEXX Management Services Europe S.A.                  France

IDEXX Veterinary Services, Inc.                        Delaware

RADIOPET INCORPORATED                                  Delaware

VetLab, Inc.                                           Texas

Veterinary Services, Inc.                              Colorado

Ubitech Aktiebolag                                     Sweden

<PAGE>   1


                                  EXHIBIT 99.1



<TABLE>
                                   SCHEDULE A

                             AGREEMENTS TRANSFERRED

                           PURSUANT TO THIS AGREEMENT
<CAPTION>


COMPANY           DESCRIPTION                             DATE              TERM
- -------           -----------                             ----              ----

<S>               <C>                                     <C>               <C>
International     Non-exclusive license and               May               3 Years/
Diagnostics       marketing agreement concerning          1988              Annual Renewal
Systems           equine drugs of abuse reagents                            Option

Flurotec, Inc.    Non-exclusive license agree-            October           3 Years/
                  ment to develop, manufacture            1988              Automatic
                  and sell assays in the bio-                               Renewal
                  technology industrial (non-
                  clinical) market

Hospital for      Feasibility and development             April             3 Years
Sick Children     funding agreement related to            1988
                  cellular flourescence biassays

Southern          Exclusive supply agreement              December          2 1/2 Years
Biotechnology     for private label reagents              1987              Expired
Associates        and supplies                                              May 1990

Pacific           Non-exclusive license agree-            Agreement
Diagnostics       ment to make, use, and                  pending
                  sell products using the Screen          signature
                  Machine/FCA technology in the           approval
                  medical research market in
                  Australia, New Zealand, and
                  the Far East.

Chicago           Research funding agreement              August            6 Months
Medical           related to measuring in vitro           1990
School            cell-mediated cytotoxicity
                  using FCA technology.


</TABLE>



<PAGE>   2


<TABLE>

                                   SCHEDULE C

            EXISTING BAXTER SERVICE CONTRACTS AND WARRANTY AGREEMENTS

                     TRANSFERRED PURSUANT TO THIS AGREEMENT

<CAPTION>

CUSTOMER                                                    INSTRUMENT
- --------                                                    ----------

<S>                                                         <C>
M.D. Anderson                                               FCA 63
Miami Baptist                                               S/M 38
Miami Baptist                                               FCA 84
Monsanto                                                    S/M 115
Affymax                                                     S/M 162
U of West Ontario                                           FCA 1054
NIH                                                         S/M 54
NIH                                                         S/M 104
Abbott                                                      S/M 28
Alcon Labs                                                  S/M 12
Centocor                                                    S/M 20
Mol Biosyst                                                 FCA 1022
Genentech                                                   S/M 37
Hosp for Sick Children                                      S/M 75
Hosp for Sick Children                                      S/M 101
Hosp for Sick Children                                      FCA 66
Comnaught                                                   S/M 110
M.D. Anderson                                               S/M 41
3M Company                                                  S/M 59
IDEXX                                                       FCA 1041
Henry Jackson                                               FCA 1084
Boehringer                                                  S/M 164
U of Alabama                                                S/M 100
U of Minnesota                                              FCA 82
Glaxco                                                      FCA 1096
Glaxco                                                      FCA 1097
U of Miami                                                  FCA 77
Athena                                                      S/M 107


Unearned Service Contract Revenue                           $60,809
         @ 7/31/90                                          =======

90 day warranty on new instruments -
warranty reserve balance @ 7/31/90    $2,583
                                      ======
</TABLE>

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE IDEXX
LABORATORIES, INC. UNAUDITED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE
SECOND QUARTER ENDING JUNE 30, 1996 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK> 0000874716
<NAME> IDEXX LABORATORIES, INC.
<MULTIPLIER> 1
<CURRENCY> U.S. DOLLARS
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               JUN-30-1996
<EXCHANGE-RATE>                                      1
<CASH>                                     139,408,462
<SECURITIES>                                48,022,684
<RECEIVABLES>                               62,719,881
<ALLOWANCES>                                 3,179,000
<INVENTORY>                                 40,195,223
<CURRENT-ASSETS>                           295,815,460
<PP&E>                                      47,772,659
<DEPRECIATION>                              17,797,580
<TOTAL-ASSETS>                             348,829,150
<CURRENT-LIABILITIES>                       50,010,682
<BONDS>                                              0
<COMMON>                                     3,695,342
                                0
                                          0
<OTHER-SE>                                 295,123,126
<TOTAL-LIABILITY-AND-EQUITY>               348,829,150
<SALES>                                    123,275,066
<TOTAL-REVENUES>                           123,275,066
<CGS>                                       53,086,914
<TOTAL-COSTS>                               53,086,914
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             126,700
<INCOME-PRETAX>                             25,174,800
<INCOME-TAX>                                10,321,668
<INCOME-CONTINUING>                         14,853,132
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                14,853,132
<EPS-PRIMARY>                                      .38
<EPS-DILUTED>                                      .38
        

</TABLE>


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