1
 
   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 19, 1999
 
                                                 REGISTRATION NO. 333-
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- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                    FORM S-1
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------
 
                            ANSYS DIAGNOSTICS, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
                            ------------------------
 

                                                            
            DELAWARE                           2835                          33-0316510
(STATE OR OTHER JURISDICTION OF    (PRIMARY STANDARD INDUSTRIAL           (I.R.S. EMPLOYER
 INCORPORATION OR ORGANIZATION)       CLASSIFICATION NUMBER)            IDENTIFICATION NO.)

 
                            25200 COMMERCENTRE DRIVE
                         LAKE FOREST, CALIFORNIA 92630
                                 (949) 770-9381
               (ADDRESS, INCLUDING ZIP CODE AND TELEPHONE NUMBER,
       INCLUDING AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                             STEPHEN K. SCHULTHEIS
                      CHAIRMAN OF THE BOARD, PRESIDENT AND
                            CHIEF EXECUTIVE OFFICER
                            ANSYS DIAGNOSTICS, INC.
                            25200 COMMERCENTRE DRIVE
                         LAKE FOREST, CALIFORNIA 92630
                                 (949) 770-9381
            (NAME, ADDRESS, INCLUDING ZIP CODE AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)
 
                                   COPIES TO:
 

                                              
            PATRICK ARRINGTON, ESQ.                          RODD M. SCHREIBER, ESQ.
            ELLEN S. BANCROFT, ESQ.              SKADDEN, ARPS, SLATE, MEAGHER & FLOM (ILLINOIS)
           MATTHEW L. STEIMEL, ESQ.                      333 W. WACKER DRIVE, SUITE 2100
        BROBECK, PHLEGER & HARRISON LLP                      CHICAGO, ILLINOIS 60606
              38 TECHNOLOGY DRIVE                                (312) 407-0700
           IRVINE, CALIFORNIA 92618
                (949) 790-6300

 
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
  As soon as practicable after this Registration Statement becomes effective.
 
    If any of the securities being registered on this form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box.  [ ]
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering.  [ ]
- ---------------
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering.  [ ]
- ---------------
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering.  [ ]
- ---------------
 
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box.  [ ]
 
                        CALCULATION OF REGISTRATION FEE
 

                                                                                      
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TITLE OF EACH CLASS                    AMOUNT           PROPOSED MAXIMUM      PROPOSED MAXIMUM
OF SECURITIES                          TO BE             OFFERING PRICE          AGGREGATE             AMOUNT OF
TO BE REGISTERED                   REGISTERED(1)          PER SHARE(2)       OFFERING PRICE(2)      REGISTRATION FEE
- ----------------------------------------------------------------------------------------------------------------------
Common Stock, $.0001 par
  value.......................       2,875,000               $12.00             $34,500,000              $9,591
- ----------------------------------------------------------------------------------------------------------------------
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(1) Includes 375,000 shares that the underwriters have the option to purchase
    solely to cover over-allotments, if any.
 
(2) Estimated solely for the purpose of computing the registration fee pursuant
    to Rule 457(a).
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE COMPANY SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(a),
MAY DETERMINE.
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   2
 
THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. WE MAY
NOT SELL THESE SECURITIES UNTIL THE REGISTRATION STATEMENT FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER
TO SELL THESE SECURITIES AND IT IS NOT SOLICITING AN OFFER TO BUY THESE
SECURITIES IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.
 
                 SUBJECT TO COMPLETION, DATED FEBRUARY 19, 1999
 
                                2,500,000 SHARES
 
                                   ANSYS LOGO
 
                                  COMMON STOCK
 
- --------------------------------------------------------------------------------
 
This is the initial public offering of ANSYS Diagnostics, Inc., and we are
offering 2,500,000 shares of our common stock. We anticipate that the initial
public offering price will be between $10.00 and $12.00 per share. We have
applied to list our common stock on the Nasdaq National Market under the symbol
"ANSD."
 
- --------------------------------------------------------------------------------
 
INVESTING IN THE COMMON STOCK INVOLVES RISKS. SEE "RISK FACTORS" BEGINNING ON
PAGE 7.
 
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                                                             PER SHARE       TOTAL
                                                             ---------    -----------
                                                                    
Initial public offering price............................     $           $
Underwriting discounts and commissions...................     $           $
Proceeds to ANSYS........................................     $           $

 
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NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS
PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
 
                             ---------------------
 
ANSYS Diagnostics, Inc. has granted the underwriters the right to purchase up to
375,000 additional shares of common stock to cover any over-allotments.
 
                             ---------------------
 
Vector Securities International, Inc.                   Sutro & Co. Incorporated
 
                      PROSPECTUS DATED             , 1999
   3
      FRONT COVER

      Depicts four captions where products are used:

            1)    Clinical laboratories -- person pipetting liquid into 
                  container.

            2)    Workforce safety-person wearing a hardhat talking on a 
                  walkie-talkie.

            3)    Department of Transportation -- truck rolling down the 
                  highway.

            4)    Law enforcement -- police officer in patrol car.

INSIDE FOLD COVER

      Onsite product being held in a hand

      Testcup product held in a hand

      Toxilab compendium

INSIDE COVER

      SPEC products displayed:

      1)    96-Well plate

      2)    Pipette tip tray

      3)    SPEC column

TESTSTIK HELD IN A HAND
 
     ANSYS(R), DRUGSTAT(TM), DRUGSTAT RA(TM), LTD-Opiate(TM), ON-SITE(R),
ON-SITE Alcohol(R), SPEC(R), SPEC-NEWS(TM), TOXI-LAB(R) and TOXI-NEWS(TM) are
trademarks of ANSYS. TesTcup(R), TesTcup ER(TM) and TesTstik(TM) are trademarks
of Roche Diagnostic Systems, Inc. This prospectus also refers to trademarks of
other companies.
   4
 
                               PROSPECTUS SUMMARY
 
     This summary highlights the information contained elsewhere in this
prospectus. Because this is only a summary, it does not contain all of the
information that may be important to you. You should read the entire prospectus
carefully, and you should consider the information under "Risk Factors" and in
our Consolidated Financial Statements and Notes before deciding to invest in the
shares of our common stock.
 
                                  OUR BUSINESS
 
     We develop, manufacture and market drug testing products and specialty
laboratory and research products. Our drug testing products detect the presence
of drugs of abuse and alcohol, primarily in on-site testing applications. These
applications include pre-employment screening, random employee testing,
government mandated testing, parole and probation monitoring and hospital-based
testing. We currently manufacture eight on-site drug testing products, all of
which are self-contained, disposable and easy to use. These products yield
highly accurate results in less than five minutes and are intended to be
cost-effective. We also offer a laboratory-based drug testing product called
TOXI-LAB(R), a broad spectrum screening system that detects more than 500 drugs
and drug byproducts in urine, blood, tissue and other specimens. In addition, we
intend to develop additional drug testing products to include tests that will
enable physicians to monitor their patients' compliance with a prescribed
therapeutic drug regimen. We have one such product, a test for Ritalin(R), under
development. In the specialty laboratory and research products market, we
manufacture and sell our SPEC(R) solid phase extraction products. We also
manufacture and sell nucleic acid isolation products, and are co-developing a
series of rapid nucleic acid separation and detection products.
 
                           OUR DRUG TESTING PRODUCTS
 
     We have applied our core competencies in product design, engineering and
manufacturing to bring to market a series of drug testing products for on-site
and laboratory testing applications. For the on-site drug testing market, we
manufacture TesTcup(R), TesTstik(TM) and ON-SITE Alcohol(R). TesTcup and
TesTstik, which we developed and currently manufacture exclusively for Roche
Diagnostic Systems, Inc., are urine-based testing devices that detect the
presence of drugs of abuse in approximately five minutes. TesTcup tests for up
to five substances simultaneously, and integrates sample collection, detection
and storage features into one simple to use device. TesTstik, a dipstick device,
detects the presence of a single drug of abuse and comes in five different
versions, each of which tests for a different commonly abused drug. ON-SITE
Alcohol, a pocket-sized test for detecting ethanol in urine or saliva, provides
results in approximately two minutes. We are currently developing new on-site
drug tests to broaden the range of substances detected and to expand the use of
our products into additional markets. For example, we and Roche are developing
new versions of TesTstik, and have completed development of TesTcup ER(TM), a
version of TesTcup that Roche will sell to hospital emergency rooms beginning in
the first quarter of 1999. We are also applying our technology expertise to
develop rapid, disposable tests for use in monitoring therapeutic drugs. For the
laboratory market, we manufacture and sell the TOXI-LAB drug screening system,
which incorporates our proprietary membranes into a bench-top, thin layer
chromatography system. TOXI-LAB uses a comprehensive, standardized set of
reference materials and offers built-in quality control and consistent and
reproducible procedures.
 
     Our on-site and laboratory drug testing products address the in vitro
diagnostic testing market. In vitro diagnostic testing is the process of
analyzing blood, urine, saliva and other specimens to detect the presence of and
monitor certain substances, diagnose diseases and other medical conditions or to
determine the chemical and microbiological constituents of the specimen. The
drugs of abuse testing segment of the United States in vitro diagnostic testing
market was approximately $628 million in 1996, and is estimated to grow to
approximately $900 million by 2002. The majority of drugs of
                                        3
   5
 
abuse testing has historically been performed in reference laboratories, where
skilled technicians must process the specimens and document test procedures and
results. On-site drug testing, however, has become increasingly accepted as an
alternative to laboratory testing with the emergence of rapid, easy to use tests
that produce precise and accurate results comparable to those achieved using
laboratory analyzers. We believe that on-site drug testing will be increasingly
used in the workplace (including pre-employment screening and random employee
testing), government mandated applications, hospital/emergency rooms,
therapeutic drug monitoring, drug treatment centers and the over-the-counter
market.
 
     We have collaborated with Roche for more than six years, and we continue to
work with Roche both contractually and informally on developing new on-site drug
testing products. We have an exclusive manufacturing relationship with Roche,
under which we manufacture the TesTcup and TesTstik product lines for them.
Roche owns all rights to and is responsible for selling and marketing the
TesTcup and TesTstik product lines. In addition, we are co-developing TesTcup ER
with Roche, and we will manufacture TesTcup ER for Roche under the same
arrangement as TesTcup.
 
                 OUR SPECIALTY LABORATORY AND RESEARCH PRODUCTS
 
     Our specialty laboratory and research products are used for solid phase
extraction and for nucleic acid separation and detection. Solid phase extraction
is a technique for removal of a target substance from a liquid onto a solid
surface and the subsequent release of that substance for analysis. We market our
solid phase extraction products under the name SPEC. Our SPEC products use our
proprietary membranes to isolate a substance of interest from urine, blood,
plasma or any other liquid sample. SPEC products are used for a variety of
analytical applications, including drugs of abuse confirmation testing,
therapeutic drug monitoring and sample preparation in drug discovery, drug
metabolism studies and environmental testing. We have also integrated our SPEC
products into two versions of our TOXI-LAB drug screening system.
 
     Nucleic acid separation involves isolating nucleic acids from other soluble
contaminants. Nucleic acids, including DNA and RNA, are the fundamental
regulatory molecules of life. Over the past 20 years, an increased understanding
of nucleic acid structure and function has led to the use of nucleic acids in a
broad array of therapeutic and diagnostic applications. All of these
applications require highly purified nucleic acids. Pure nucleic acids are
essential for reliability and reproducibility of molecular biology experiments
in both academic and industrial research laboratories, as well as for the
accuracy of results in nucleic acid-based clinical diagnostics. We produce two
custom nucleic acid isolation products for Promega Corporation. In addition, we
are developing a series of rapid nucleic acid separation and detection products
in conjunction with Molecular Innovations, Inc.
 
     Our specialty laboratory and research products are marketed primarily to
clinical and environmental testing laboratories, pharmaceutical and
biotechnology companies and DNA testing and research organizations.
 
                                  OUR STRATEGY
 
     We seek to strengthen our competitive market position in the drug testing
and specialty laboratory and research markets. To achieve this objective, we are
pursuing the following strategies:
 
     - Employ market driven product development;
 
     - Focus on strategic relationships;
 
     - Accelerate development of new drug testing products;
 
     - Increase emphasis on specialty laboratory and research products;
 
     - Achieve manufacturing efficiencies through automation; and
 
     - Pursue strategic acquisitions.
                                        4
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                                  THE OFFERING
 
Common stock offered.......................    2,500,000 shares
 
Common stock to be outstanding after this
offering...................................    8,016,512 shares(1)
 
Use of proceeds............................    For redemption of preferred stock
                                               and payment of cumulative
                                               dividends; for repayment of
                                               indebtedness; for the acquisition
                                               of complementary businesses,
                                               products and technologies; and
                                               for working capital and other
                                               general corporate purposes. See
                                               "Use of Proceeds."
 
Proposed Nasdaq National Market symbol.....    ANSD
 
                      SUMMARY CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 


                                                                YEARS ENDED DECEMBER 31,
                                                --------------------------------------------------------
                                                 1994        1995        1996        1997         1998
                                                ------      ------      ------      -------      -------
                                                                                  
STATEMENT OF OPERATIONS DATA:
  Net sales...................................  $6,589      $6,447      $8,126      $10,698      $18,964
  Gross profit................................   4,588       4,178       5,068        5,599        9,261
  Operating expenses..........................   3,117       3,364       3,204        3,649        4,749
  Operating income............................   1,471         814       1,864        1,950        4,512
  Net income..................................  $  971      $  494      $1,201      $ 1,206      $ 2,691
  Earnings per share(2):
    Basic.....................................  $ 0.34      $ 0.14      $ 0.46      $  0.54      $  1.33
    Diluted...................................  $ 0.15      $ 0.08      $ 0.19      $  0.20      $  0.45
  Weighted average shares outstanding(2):
    Basic.....................................   2,307       2,307       2,230        1,901        1,890
    Diluted...................................   6,039       6,076       6,057        5,864        5,942
  Pro forma earnings per share(2):
    Basic.....................................  $ 0.16      $ 0.08      $ 0.20      $  0.21      $  0.47
    Diluted...................................  $ 0.16      $ 0.08      $ 0.19      $  0.20      $  0.44
  Pro forma weighted average shares
    outstanding(2):
    Basic.....................................   6,154       6,154       6,077        5,748        5,737
    Diluted...................................   6,244       6,282       6,262        6,069        6,147

 


                                                                          DECEMBER 31, 1998
                                                              -----------------------------------------
                                                                                           PRO FORMA
                                                              ACTUAL     PRO FORMA(3)    AS ADJUSTED(4)
                                                              -------    ------------    --------------
                                                                                
BALANCE SHEET DATA:
  Cash and cash equivalents.................................  $ 3,176       $  916          $24,047
  Working capital...........................................    5,053        2,793           26,148
  Total assets..............................................   11,891        9,631           32,762
  Total long-term debt......................................    1,894        1,894               --
  Total stockholders' equity................................    7,664        5,404           30,429

 
- -------------------------
(1) The number of shares of common stock to be outstanding after this offering
    is based on the number of shares outstanding as of January 31, 1999, and
    does not include 997,380 shares of common stock issuable upon the exercise
    of options outstanding as of January 31, 1999, at a weighted average
    exercise price of $1.65 per share.
(2) See Notes 10 and 11 of Notes to Consolidated Financial Statements for
    information regarding the determination of per share calculations.
(3) Pro forma to give effect to: (a) the payment of all undeclared cumulative
    dividends on our preferred stock; (b) the redemption of our outstanding
    Series A redeemable preferred stock; and (c) the conversion of our
    outstanding Series B convertible preferred stock, all of which will occur
    upon consummation of this offering.
(4) Pro forma as described in footnote (3) and as adjusted to give effect to the
    receipt and application of the estimated net proceeds from the sale of the
    2,500,000 shares offered by this prospectus. See "Use of Proceeds."
                                        5
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                                  OUR COMPANY
 
     ANSYS was incorporated in 1988 in California and will be reincorporated in
Delaware in March 1999. Our executive offices are located at 25200 Commercentre
Drive, Lake Forest, California 92630, and our telephone number is (949)
770-9381.
 
                           -------------------------
 
     In this prospectus, "ANSYS," the "Company," "we," "us" and "our" refer to
ANSYS Diagnostics, Inc. The use of the term "our" in phrases such as "our
products" is not intended to infer that we hold any intellectual property or
other ownership rights to the TesTcup and TesTstik product lines. Unless
otherwise indicated, all information in this prospectus assumes that:
 
     - the initial public offering price will be $11.00 per share;
 
     - we will redeem all of our outstanding Series A redeemable preferred
       stock;
 
     - we will convert all of our outstanding Series B convertible preferred
       stock into 3,641,328 shares of our common stock;
 
     - we will declare a 1.2-for-1 stock split of our common stock in February
       1999;
 
     - we will reincorporate ANSYS in Delaware in March 1999; and
 
     - the underwriters will not exercise their over-allotment option and no
       other person will exercise any other outstanding options.
                                        6
   8
 
                                  RISK FACTORS
 
     YOU SHOULD CONSIDER CAREFULLY THE FOLLOWING RISKS BEFORE YOU DECIDE TO BUY
OUR COMMON STOCK. THE RISKS AND UNCERTAINTIES DESCRIBED BELOW ARE NOT THE ONLY
ONES THAT WE FACE. ADDITIONAL RISKS AND UNCERTAINTIES NOT PRESENTLY KNOWN TO US
OR THAT WE CURRENTLY DEEM IMMATERIAL MAY ALSO ADVERSELY AFFECT OUR BUSINESS
OPERATIONS. IF ANY OF THE FOLLOWING RISKS ACTUALLY OCCUR, THEY COULD SERIOUSLY
HARM OUR BUSINESS, FINANCIAL CONDITION OR RESULTS OF OPERATIONS. IN THIS CASE,
THE TRADING PRICE OF OUR COMMON STOCK COULD DECLINE.
 
WE DEPEND ON REVENUES FROM SALES TO ROCHE.
 
     We derive a substantial portion of our revenues and earnings from the sale
of TesTcup, TesTstik and ON-SITE Alcohol to Roche. These products together
accounted for approximately 17% of our net sales during 1996, 42% of our net
sales during 1997 and 65% of our net sales during 1998. We expect our revenues
and profitability in the foreseeable future to depend substantially on our
relationship with Roche.
 
     We currently manufacture the TesTcup and TesTstik product lines for Roche
pursuant to manufacturing agreements and other arrangements with Roche. Roche
owns or has licensed from other parties all patent, intellectual property and
other trademark rights to these products. We have no rights to the TesTcup and
TesTstik product lines except our right to manufacture these products for Roche
under our exclusive manufacturing agreements. Roche also owns the rights to any
new versions of TesTcup and TesTstik which we may develop in the future. Under
our agreements with Roche, we must offer Roche the first opportunity to
exclusively market any and all new antibody-based drugs of abuse products which
we develop. Roche also owns the rights to TesTcup ER, a version of TesTcup
designed for use in hospital emergency rooms. Roche has full responsibility for
and complete control over the introduction and launch of this product. As a
result, the successful introduction of TesTcup ER will depend on the efforts of
Roche and is beyond our effective control.
 
     Our agreements with Roche give Roche complete control over all aspects of
marketing the TesTcup and TesTstik product lines, including product pricing,
sales force composition and promotional activities. We cannot be certain that:
(1) Roche will continue to devote sufficient resources to market and sell the
TesTcup and TesTstik products effectively; (2) that Roche will devote sufficient
resources in the future to market and sell TesTcup ER, either due to a lack of
consumer demand or otherwise; or (3) that Roche will market any of these
products at prices that can achieve market acceptance. Under our agreements with
Roche, we have the exclusive right to manufacture TesTcup and TesTcup ER for
Roche until January 2003 and to manufacture TesTstik for Roche until October
2002. These agreements do not require Roche to purchase any minimum amounts of
products, and we do not have the right to sell or market these products
directly. Roche may use another vendor to manufacture TesTcup or TesTstik if
Roche gives us notice that the products we are manufacturing do not meet the
specifications of the agreement or that we are not providing sufficient
quantities on a timely basis, and we are unable to promptly correct the problem
or produce sufficient quantities. We cannot be certain that our agreements with
Roche will not be terminated, or that they will be renewed or extended. Our
business, financial condition and results of operations will be materially and
adversely affected if Roche does not devote sufficient resources to marketing
TesTcup, TesTstik, ON-SITE Alcohol or TesTcup ER, if Roche stops buying any of
these
 
                                        7
   9
 
products from us, either due to lack of consumer demand or otherwise, or if
Roche terminates or does not renew or extend our agreements with them.
 
WE DEPEND ON SOLE SOURCE SUPPLIERS FOR RAW MATERIALS.
 
     We use certain essential raw materials in our manufacturing processes which
are currently available only through a single source. These raw materials
include:
 
     - the nitrocellulose membranes used in the TesTcup and TesTstik products;
 
     - the glass membranes used in our TOXI-LAB and SPEC products; and
 
     - certain liquid reagents used in the manufacture of TesTcup and TesTstik.
 
     We experienced a shortage of nitrocellulose membranes in 1998 because
demand for the TesTcup and TesTstik products was greater than we had
anticipated. Some of our membranes are custom made for us by single suppliers,
and Roche is the only custom manufacturer of all of the liquid reagents used in
the TesTcup and TesTstik products. We do not have any long-term supply
agreements with any of these suppliers, and we have not qualified alternative
suppliers for any of these raw materials. If we were to lose any of our current
suppliers of these materials, we would have to qualify a new supplier for that
material. We would also have to repeat product testing using the raw materials
from the new supplier and may have to seek additional regulatory approvals. We
cannot be certain that these raw materials will continue to be available on
acceptable terms, or at all, or that alternative suppliers will be available.
Any delays or reductions in product shipments by our suppliers could damage our
relationships with our customers. Further, a significant increase in the price
of one or more of these raw materials could adversely affect our gross margins
or operating results.
 
WE NEED TO MANAGE OUR RAPID GROWTH EFFECTIVELY.
 
     Over the past few years, our business has grown rapidly and we have
significantly expanded our operations to accommodate this growth. This expansion
has placed, and continues to place, a significant strain on our limited
personnel, management, operating systems and other resources. Our net sales
increased 77.3% over the past year, from $10.7 million in 1997 to $19.0 million
in 1998. This rapid growth has:
 
     - made it difficult to forecast supply requirements accurately;
 
     - required us to implement new and upgraded operational and financial
       systems, procedures and controls; and
 
     - increased the responsibilities of management personnel.
 
     To manage growth effectively, we must continue to implement and improve our
operational, financial and management information systems. We must also hire,
train and manage additional employees, especially the highly skilled employees
needed to operate our manufacturing facility, especially as it becomes
increasingly automated. Our future financial performance will be adversely
affected if we are unable to manage our growth effectively.
 
                                        8
   10
 
WE DEPEND ON KEY PERSONNEL FOR OUR SUCCESS.
 
     Due to the specialized nature of our business, we are highly dependent on
the continued service of our executive officers and other key management,
scientific and technical personnel, particularly Stephen K. Schultheis, our
Chairman, President and Chief Executive Officer, Steven P. Sidwell, our
Executive Vice President -- Operations, and Dr. Dennis D. Blevins, our Vice
President -- Research and Development. We do not have employment contracts with
any of our officers or key employees. The loss of any of these persons would
adversely affect our business. Our success will also depend in large part upon
our ability to continue to attract, retain and motivate qualified scientific and
technical personnel with advanced degrees, and technical research and
manufacturing skills. The competition for qualified personnel is intense. If we
cannot attract, retain and motivate such qualified personnel, our business will
be adversely affected.
 
WE ARE SUBJECT TO MANY RISKS RELATED TO MANUFACTURING AND OUR CONTINUING EFFORTS
TO INCREASE AUTOMATION.
 
     We have historically manufactured products using manual assembly processes.
To increase manufacturing capacity and improve operating margins, we have begun
automating certain portions of our assembly lines. We intend to continue this
automation process, but it involves a number of risks, including:
 
     - automation is costly because much of our equipment must be custom made
       and delays are beyond our control;
 
     - automation does not guarantee improved operating margins or increased
       manufacturing capacity;
 
     - automation is likely to increase responsibilities for management
       personnel;
 
     - automation can result in quality control issues; and
 
     - necessary qualification and validation processes may delay the
       implementation of automation.
 
     We may not succeed in automating our manufacturing facility or increasing
its capacity in a timely manner, at a commercially reasonable cost, or at all.
Provided that we finish the planned automation of our facility, our
manufacturing processes will be sensitive to many different factors, including
raw material variations, manufacturing process variances, and manufacturing
equipment performance.
 
     As we increase production, we will have to use our equipment more hours
each day. This additional use increases the potential for down-time resulting
from equipment failure. Also, only a few employees will be trained to operate
and maintain the manufacturing equipment. Our ability to operate and service
this equipment effectively could be impaired by the loss of those employees. In
addition, we manufacture all products at a single facility in Lake Forest,
California. A disaster such as an earthquake or fire that damages this facility
could interrupt our manufacturing process. Our business would be adversely
affected by the interruption of our manufacturing operations or the loss of
employees who maintain or service the manufacturing facility.
 
                                        9
   11
 
OUR QUARTERLY OPERATING RESULTS FLUCTUATE AS A RESULT OF MANY FACTORS.
 
     Our quarterly operating results have fluctuated and are likely to continue
to fluctuate due to a number of factors, many of which are not within our
control. Factors that could affect our operating results include the following:
 
     - the resources Roche dedicates to the marketing of products we develop and
       manufacture;
 
     - ANSYS' and Roche's ability to develop, introduce, market and gain market
       acceptance for new products and product enhancements in a timely manner;
 
     - changes in pricing policies by us, Roche, suppliers or competitors;
 
     - the availability of raw materials used to manufacture our products;
 
     - our ability to forecast demand for products accurately;
 
     - unanticipated changes in inventory requirements of our customers;
 
     - variations in the mix of products we sell;
 
     - the introduction of new products or product enhancements by competitors;
 
     - our ability to automate our manufacturing processes successfully;
 
     - our ability to expand capacity or achieve further manufacturing
       efficiencies;
 
     - the timing and increased costs associated with increased sales and
       marketing, and research and development activities;
 
     - changes in government regulation of our products;
 
     - changes in the legal status or procedural requirements for employment
       drug testing;
 
     - international economic conditions and currency fluctuations; and
 
     - general economic and market conditions.
 
     Our sales in any quarter typically include a few large orders from key
customers such as Roche, and our business could be adversely affected by the
timing of any of these orders or the loss of any significant customer. Because
of the factors listed above and other risks discussed in this prospectus, our
future operating results could be below the expectations of securities analysts
and/or investors. If that happens, our business and the trading price of our
common stock could be adversely affected.
 
OUR INDUSTRY IS HIGHLY COMPETITIVE.
 
     We compete with numerous other companies, and we expect competition to
increase due to the increased acceptance of drug testing and technological
advancements. Increased competition is likely to result in price reductions,
reduced gross margins and loss of market share. Any of these results could
adversely affect our business. Our principal competitors include companies that
manufacture disposable tests that can be conducted on-site, such as in the
workforce, as well as companies that manufacture products used in clinical
settings, such as hospitals and reference laboratories. We believe independent
reference and hospital laboratories currently perform the majority of diagnostic
tests. We expect that these laboratories will compete vigorously to maintain
their competitive position. To achieve broad market acceptance for the products
we manufacture, we, together with Roche, will need to demonstrate that our
products are an attractive alternative to laboratory testing. In
 
                                       10
   12
 
order for us to be successful, these laboratories may need to change their
current means of testing.
 
     We typically compete principally on the basis of accuracy, ease of use,
distribution capabilities and price. Some of our competitors have much greater
financial, technical, research and other resources than we have. These
competitors may also:
 
     - have larger, more established sales and marketing, distribution and
       service organizations;
 
     - offer broader product lines and test for more substances;
 
     - have greater name recognition;
 
     - offer discounts as a competitive tactic; and
 
     - have invested in competing technologies that may be more effective than
       our technologies.
 
     In addition, our competitors may develop and market technologies or
products that are more effective or commercially attractive than our products.
As a result, we may experience increased competition, reduced sales and slower
growth in the future. These new technologies and products could render our
products obsolete. We cannot be certain that we will have the technical
expertise, or the financial, marketing or distribution resources to compete
effectively in the future.
 
WE DEPEND ON DISTRIBUTORS AND HAVE LIMITED DIRECT SALES RESOURCES.
 
     We rely upon third party distributors, as well as our own sales force, to
distribute our products. We may also rely upon distributors to distribute
products currently under development. If we lose one or more of these
distributors and cannot arrange suitable alternatives, our business could be
adversely affected. We may not be able to enter into new distribution or
marketing agreements on satisfactory terms, or at all. We cannot be certain that
our distributors will devote sufficient resources to effectively market and sell
the products manufactured by us, that they will devote sufficient resources in
the future to market and sell any new products manufactured by us, or that they
will market these products at prices that can achieve market acceptance. In
addition, our distributors may give higher priority to the products of similar
suppliers or their own products, thus reducing their efforts to sell products
manufactured by us. If any of our distributors become unwilling or unable to
promote, market and sell products manufactured by us, our business could be
adversely affected. We currently have limited resources in direct sales, and in
the marketing and distribution of our products. If we decide to distribute new
products directly, we will have to invest in additional sales and marketing
resources, particularly to add more field sales personnel. Our direct sales,
marketing and distribution efforts may not be successful, and revenue from these
efforts may not exceed our increased expenses.
 
WE DEPEND IN PART ON THE DEVELOPMENT, INTRODUCTION AND MARKET ACCEPTANCE OF NEW
PRODUCTS.
 
     We are in various stages of development of new products, both independently
and in collaboration with third parties. We believe our revenue growth and
future operating results will depend, in part, on our ability to complete
development of these products and
 
                                       11
   13
 
successfully introduce them. In order to successfully introduce and sell these
products, we must, among other things:
 
     - undertake time-consuming and costly development, manufacturing and other
       activities;
 
     - obtain necessary regulatory clearance or approvals in a timely manner;
 
     - establish and maintain reliable, cost-efficient, high-volume
       manufacturing capacity for these products;
 
     - ensure that our products comply with government and regulatory testing
       guidelines;
 
     - develop new products or modify existing products to detect the presence
       of new substances; and
 
     - obtain approval from our strategic partners.
 
     Each stage of this process involves inherent difficulties. We may not be
able to successfully develop, introduce, cost-effectively manufacture or achieve
market acceptance for new products or enhancements to existing products.
 
     We may from time to time invest in new products or product enhancements
that may not ultimately achieve broad market acceptance. We have recently
invested significant resources into the development of TesTcup ER, TesTstik 2
and TesTstik 3. We cannot be sure that any of these products will achieve broad
market acceptance. It is possible that Roche may decide not to launch, market or
sell these products, and we have no right to market or sell these products
ourselves.
 
WE MUST COMPLY WITH VARIOUS GOVERNMENT REGULATIONS AND CANNOT BE ASSURED OF
OBTAINING REGULATORY APPROVAL.
 
     SECTION 510(K) NOTIFICATION AND PREMARKET APPROVAL. We cannot market or
commercially sell new products unless the FDA has exempted them from its market
clearance requirements or, if the products are not exempt, until the FDA either
clears a notification under Section 510(k) of the Federal Food, Drug and
Cosmetic Act or approves an application for premarket approval. The process of
obtaining either 510(k) clearance or premarket approval can be lengthy,
expensive and uncertain. All of our drug testing products and some of our
specialty laboratory and research products are currently marketed pursuant to
510(k) notifications. It is also possible that modifications or enhancements to
existing products will require clearance of new 510(k) notifications. New
products may, however, require the more time consuming and costly premarket
approval.
 
     We or our strategic partners may not be able to obtain new clearances or
approvals for new products or new applications, particularly for products we
intend to produce for over-the-counter sales. Nor can we be certain that FDA
review will not delay or adversely affect the marketing and sale of our
products. Government regulations depend heavily on interpretation and could be
applied retroactively. Future interpretations by the FDA or other regulatory
bodies could adversely affect our business. If previously unknown problems with
a cleared or approved product are discovered, we or our strategic partners may
be required to restrict the product's marketing or withdraw the product from the
market entirely. Our business could be adversely affected by the loss of
previously obtained clearances or the failure to comply with existing or future
regulatory requirements.
 
                                       12
   14
 
     QUALITY SYSTEM REGULATIONS. We are also subject to the FDA's Quality System
Regulations because we manufacture medical devices marketed in the United
States. These regulations include detailed requirements for testing, quality
control, complaint and failure investigations, corrective and preventive
actions, product labeling, process and procedure documentation, and design
controls.
 
     ROUTINE INSPECTIONS. We are subject to routine inspection by the FDA and
other federal and state regulatory agencies for compliance with Quality System
Regulations, Medical Device Reporting requirements and other applicable
regulations. We cannot be certain that we will remain in compliance with all of
such regulations. Noncompliance with applicable requirements can result in,
among other things:
 
     - warning letters;
 
     - fines;
 
     - injunctions;
 
     - civil penalties;
 
     - recall or seizure of products;
 
     - total or partial suspension of production;
 
     - failure of the government to grant 510(k) clearance or premarket approval
       for devices;
 
     - withdrawal of marketing clearances or approvals; and
 
     - criminal prosecution.
 
     OTHER REGULATIONS. The Clinical Laboratory Improvement Amendments (CLIA) of
1988, as amended, and related federal and state regulations govern quality
control, proficiency testing, personnel standards and federal inspections. Our
ability to market our products, and our business, financial condition and
results of operations could be adversely affected by future amendments of this
legislation or the issuance of additional regulations for laboratory testing. We
are also subject to numerous environmental and safety laws and regulations,
including those governing the use and disposal of hazardous materials.
 
     We may incur significant costs in the future in complying with FDA
mandates, the Quality System Regulations, CLIA and environmental regulations.
 
WE MAY NOT BE ABLE TO ADEQUATELY PROTECT OR ENFORCE OUR INTELLECTUAL PROPERTY
RIGHTS.
 
     Our ability to compete effectively depends in part upon our ability to
develop and maintain the proprietary aspects of our technology and to operate
without infringing the proprietary rights of others. We hold two United States
patents pertaining to ON-SITE Alcohol. We are currently pursuing two pending
patent applications for other new products, but we cannot be certain that we
will receive the patents. In addition, even if patents are issued, our existing
or future patents may not protect us from competitors with similar technology.
Our existing or future patents could still be challenged, invalidated or
circumvented. If we are not able to adequately protect our technology, our
competitors can more easily offer similar products.
 
     Roche holds all of the intellectual property and other ownership rights to
TesTcup and TesTstik, two of the largest volume product lines that we
manufacture. Under our agreements with Roche, we have exclusive manufacturing
rights to TesTstik until October
                                       13
   15
 
2002 and to TesTcup until January 2003. If we develop a new patentable invention
relating to either of these products during the term of these agreements, Roche
will own any and all patentable rights. We cannot be certain that Roche will
aggressively protect its patents or licenses on the products we manufacture. Our
business could be adversely affected by Roche's failure to protect its rights.
 
     To develop and maintain our competitive position, particularly with respect
to our membrane technologies, we rely principally on trade secrets, technical
know-how and continuing innovation. We generally enter into confidentiality
agreements with our employees and strategic partners. We also attempt to control
access to and distribution of our documentation and other proprietary
information. It may, however, be possible for a third party to:
 
     - copy or otherwise obtain and use our products, services or technology
       without authorization;
 
     - develop similar technology independently; or
 
     - design around our intellectual property or the intellectual property of
       our strategic partners.
 
Because of these possibilities, we cannot be certain that we can achieve
meaningful protection of our proprietary technology.
 
     In addition, effective copyright, trademark and trade secret protection may
be unavailable or limited in certain foreign countries. We may also be required
to litigate to enforce our or our strategic partners' intellectual property
rights or protect our trade secrets. We may also need to litigate to determine
the validity and scope of proprietary rights of others, including our customers.
Any time we are involved in litigation, we will likely incur significant costs.
Litigation can also divert management's efforts and other resources from our
business. In addition, litigation could result in the issuance of an injunction
which could require us or our strategic partners to withdraw certain products
from the market or redesign certain products currently offered for sale or under
development. We may also be required to obtain a license to continue producing a
product, which may not be available on reasonable terms, or at all.
 
WE MAY NEED TO RAISE ADDITIONAL CAPITAL.
 
     We believe that the net proceeds of this offering, together with the cash
generated from our operations and the funds available under our credit facility,
should satisfy our capital requirements for at least the next 12 months. Our
future capital requirements will depend on many factors, including:
 
     - market acceptance of our products;
 
     - increased research and development funding;
 
     - increased sales and marketing expenses;
 
     - potential acquisitions of businesses and product lines;
 
     - inventory levels; and
 
     - progress of our planned automation.
 
     If our capital requirements are materially different from those currently
planned, we may need additional capital sooner than anticipated. Additional
financing may not be
                                       14
   16
 
available on acceptable terms, or at all. If adequate funds are not available or
are not available on acceptable terms, we may be unable to develop or enhance
our products, expand our sales and marketing programs, take advantage of future
opportunities or respond to competitive pressures. If additional funds are
raised through the issuance of equity securities, the percentage ownership of
our stockholders will be reduced and the equity securities may have rights,
preferences and privileges senior to our common stock.
 
WE MAY HAVE PRODUCT LIABILITY EXPOSURE NOT COVERED BY INSURANCE AND
UNANTICIPATED EXPOSURE UNDER WARRANTIES.
 
     The manufacture and sale of medical diagnostic devices entails an inherent
risk of product liability claims. We face financial exposure to product
liability claims if the use of our products results in an improper diagnosis. To
date, we have not experienced any material product liability claims. Potential
product liability claims may exceed the amount of our insurance coverage or may
be excluded from coverage under the terms of the policy. Product liability
insurance is expensive, and we cannot be certain that our existing insurance can
be renewed at an acceptable cost, or at all, or that it would adequately protect
us against these types of claims.
 
     We also may face warranty exposure which could adversely affect our results
of operations. Our products typically carry a one year warranty against defects
in materials and workmanship. For the TesTcup and TesTstik product lines, we are
responsible for all costs, expenses and consequential damages under our
contracts with Roche for all product recalls, returns and defects attributable
to manufacturing. Based on our prior warranty experience, we have not
established any reserves for the liability associated with product warranties.
Accordingly, any unforeseen warranty exposure could adversely affect our
operating results.
 
OUR BUSINESS COULD BE ADVERSELY AFFECTED BY YEAR 2000 COMPLIANCE ISSUES.
 
     Many currently installed computer systems and software products are coded
to accept only two digit entries in the date code field. These systems and
software products will need to accept four digit entries to distinguish 21st
century dates from 20th century dates. As a result, computer systems and/or
software used by many companies may need to be upgraded to comply with such year
2000 requirements or risk system failure or miscalculations, potentially causing
disruptions of normal business activities. We rely on our systems and
applications to operate and monitor all major aspects of our business, including
our financial systems. Although we believe our internal systems are year 2000
compliant, we cannot know for certain all of the problems that may arise until
the turn of the century. Any disruption in our information systems could cause
shipment errors, make it difficult to forecast adequately, harm our customer
relationships and in general, adversely affect our business. We also rely on
computer systems of other entities, both domestic and international, for the
accurate exchange of data. These entities include customers, suppliers,
creditors and financial organizations. Even if our internal systems are not
affected by the year 2000 issue, our business could be materially disrupted by
year 2000 problems within these other entities.
 
     In 1997, we developed a three-phase program for year 2000 information
systems compliance. In Phase I, we conducted an internal review of our systems
and contacted our software suppliers to determine our major areas of exposure to
year 2000 issues. In Phase II, we developed and implemented action plans to be
year 2000 compliant in all
 
                                       15
   17
 
areas by late 1998. In Phase III, we are testing each major area of exposure to
ensure compliance. We expect Phase III to be completed by mid-1999.
 
     In Phase I of our compliance program we identified three major areas
determined to be critical for successful year 2000 compliance:
 
     - financial and informational system applications;
 
     - manufacturing applications; and
 
     - third party relationships.
 
     We determined that our financial and information system applications are
year 2000 compliant because they were recently implemented. We believe that we
will not incur any additional material expenditures to replace our core
financial and reporting and manufacturing systems. We have also contacted most
of the entities with which we have a material third party relationship. To date,
those who have responded have indicated that they intend to be year 2000
compliant by the turn of the century. We have not determined what costs will be
incurred in connection with our third party relationships, but such costs could
be substantial. We do not currently have any contingency plans for unforeseen
year 2000 issues.
 
THERE HAS BEEN NO PRIOR MARKET FOR OUR STOCK AND ITS TRADING PRICE MAY BE
VOLATILE.
 
     There has been no public market for our common stock prior to this
offering. The initial public offering price will be determined by negotiation
with the representatives of the underwriters, based upon factors that may be
unrelated to future market performance. We cannot be certain that an active
public market for our common stock will develop or be sustained after this
offering. Nor can we be certain that the market price of our common stock will
not decline below the initial public offering price. The trading price of our
common stock could fluctuate widely due to:
 
     - quarter to quarter variations in results of operations;
 
     - announcements of technological innovations;
 
     - new products offered by us or our competitors;
 
     - changes in earnings estimates or buy/sell recommendations by securities
       analysts;
 
     - additions or departures of key personnel;
 
     - changes in the legal status of drug testing;
 
     - announcements of strategic relationships or acquisitions; or
 
     - other events or risk factors.
 
     In addition, the securities markets in general have experienced extreme
price and trading volume volatility in the past, particularly in the diagnostic
and specialty laboratory and research products markets. The trading prices of
securities of many companies in these markets have fluctuated broadly, often for
reasons unrelated to the operating performance of the specific companies. These
broad market and industry factors may adversely affect the trading price of our
common stock, regardless of our actual operating performance. If the market
price of our common stock declines, we may be subject to costly and time
consuming litigation.
 
                                       16
   18
 
ANTI-TAKEOVER PROVISIONS MAY AFFECT THE PRICE OF OUR COMMON STOCK.
 
     Certain provisions of our certificate of incorporation, bylaws and Delaware
law could make it difficult for a third party to acquire us, even though an
acquisition might be beneficial to our stockholders.
 
     CHARTER DOCUMENTS. Under our certificate of incorporation, our Board of
Directors has the authority, without stockholder action, to issue up to
5,000,000 shares of preferred stock in one or more classes or series. Our Board
of Directors determines when we will issue preferred stock. It also determines
the rights, preferences and privileges of any preferred stock we issue. Our
certificate of incorporation also provides for staggered terms for Board members
and does not permit stockholders to act without a meeting. In addition, our
bylaws establish an advance notice procedure for stockholder proposals and for
nominating candidates for election as directors.
 
     DELAWARE LAW. Delaware corporate law contains provisions that can affect
the ability to take over a company. With certain exceptions, we cannot engage in
any "business combination" with a person or group of persons who own 15% or more
of our common stock. This restriction is in effect for three years after the
time that the person or persons acquired 15% of our common stock. However, if we
follow certain procedures in connection with approving a proposed business
combination, the restriction does not apply. Our Board of Directors has the
power to determine if we will follow these procedures.
 
     These provisions of our certificate of incorporation and bylaws and of
Delaware law may have the effect of:
 
     - delaying, deterring or preventing a change in control;
 
     - discouraging bids for our common stock at a premium over the market
       price;
 
     - adversely affecting the market price of our common stock; and
 
     - adversely affecting voting and other rights of our stockholders.
 
A SIGNIFICANT NUMBER OF SHARES ARE AVAILABLE FOR SALE AND THEIR SALE COULD
DEPRESS OUR STOCK PRICE.
 
     Sales of substantial amounts of our common stock, including shares issued
upon the exercise of outstanding options, in the public market after this
offering, could adversely affect the market price of our common stock. These
sales also might make it more difficult for us to sell equity or equity-related
securities in the future at a time and price that we deem appropriate. Upon
completion of this offering, we will have 8,016,512 shares of common stock
outstanding. Of these shares, the 2,500,000 shares sold in this offering will be
freely tradeable in the public market. In addition, 18,400 shares will be
available for sale in the public market 90 days following the date of this
prospectus. All of the remaining 5,498,112 shares will be eligible for future
sale in the public market 180 days from the date of this prospectus. Of these
shares, 5,165,348 will be eligible for sale under SEC Rule 144. This rule
contains volume, manner of sale and other restrictions on the ability to sell
these shares.
 
     The holders of 5,498,112 shares of our common stock have certain rights
with respect to registration of those shares for sale in the public market. We
also intend to file a registration statement covering the sale of 1,329,780
shares of our common stock granted or authorized for grant under our option
plans. As of January 31, 1999, we had outstanding
 
                                       17
   19
 
options to purchase a total of approximately 997,380 shares of our common stock.
Sales of large amounts of these shares in the public market or the prospect of
such sales could adversely affect the market price of our common stock. We
cannot predict what impact, if any, that future sales of shares or the
availability of shares for sale will have on the market price of our common
stock.
 
WE ARE CONTROLLED BY INSIDERS.
 
     Upon completion of this offering, our directors, executive officers and
their affiliates will beneficially own approximately 65.9% of our common stock,
or approximately 63.1% if the underwriters' over-allotment option is exercised
in full. Following this offering, Ronald J. Hall, one of our directors, and his
affiliates, will beneficially own an aggregate of 47.5% of our common stock. As
a result of this concentration of ownership, our directors, executive officers
and their affiliates have the ability to significantly influence our company and
our affairs and business, including the election of a majority of the Board and
approval of significant corporate transactions. As a result, certain
transactions may not be possible or may be delayed without the approval of these
stockholders, including:
 
     - proxy contests;
 
     - mergers;
 
     - tender offers;
 
     - open market stock purchase programs or other purchases of our common
       stock; and
 
     - other transactions that could give our stockholders the opportunity to
       realize a premium over the then prevailing market price of our common
       stock.
 
WE DO NOT PAY DIVIDENDS.
 
     We have never paid cash dividends on our common stock and do not anticipate
paying any cash dividends on our common stock in the foreseeable future.
 
NEW INVESTORS WILL EXPERIENCE IMMEDIATE AND SUBSTANTIAL DILUTION.
 
     The assumed initial public offering price is substantially higher than the
pro forma net tangible book value per share of our common stock after this
offering. Purchasers of our common stock in this offering will experience
immediate and substantial dilution in the pro forma net tangible book value of
their shares of approximately $7.22 per share from the initial public offering
price. Purchasers will experience additional dilution upon the exercise of
outstanding options and in the event we issue additional common stock in
connection with future acquisitions or other financing needs.
 
                                       18
   20
 
THIS PROSPECTUS CONTAINS FORWARD-LOOKING STATEMENTS.
 
     This prospectus contains forward-looking statements that are based on our
current expectations, assumptions, estimates and projections about us and our
industry. When used in this prospectus, the words "expects," "anticipates,"
"estimates," "intends" and similar expressions are intended to identify
forward-looking statements. These statements include, but are not limited to,
statements under the captions "Risk Factors," "Use of Proceeds," "Management's
Discussion and Analysis of Financial Condition and Results of Operations,"
"Business" and elsewhere in this prospectus concerning, among other things:
 
     - our ability to maintain current strategic relationships;
 
     - our ability to achieve cost reductions and automate our manufacturing
       processes;
 
     - our ability to develop, introduce and market new products in a timely
       manner;
 
     - the timing and availability of products under development;
 
     - our ability to commercialize new products;
 
     - the market acceptance of our products;
 
     - our ability to make sales to new customers or form strategic alliances;
 
     - our ability to provide sufficient customer support;
 
     - the adequacy of our capital resources;
 
     - our ability to address year 2000 issues adequately;
 
     - future fluctuations in our operating expenses;
 
     - our future capital expenditures and cash resources; and
 
     - the use of the net proceeds from this offering.
 
     These forward-looking statements are subject to risks and uncertainties
that could cause actual results to differ materially from those projected. The
cautionary statements made in this prospectus should be read as being applicable
to all related forward-looking statements wherever they appear in this
prospectus. We assume no obligation to update such forward-looking statements
publicly for any reason, or to update the reasons actual results could differ
materially from those anticipated in such forward-looking statements, even if
new information becomes available in the future.
 
                                       19
   21
 
                                USE OF PROCEEDS
 
     The net proceeds to ANSYS from the sale of the 2,500,000 shares of common
stock offered by ANSYS are estimated to be approximately $25.0 million ($28.9
million if the underwriters exercise their over-allotment option in full),
assuming an initial public offering price of $11.00 per share and after
deducting estimated underwriting discounts and commissions and estimated
offering expenses payable by ANSYS.
 
     We intend to use approximately $2.3 million of the net proceeds of this
offering to redeem all of our outstanding Series A redeemable preferred stock
and to pay all cumulative dividends that have accrued on all of the outstanding
shares of our preferred stock through the closing of this offering. We also plan
to use approximately $1.9 million of the net proceeds of this offering to repay
our bank debt, which was used for tenant improvements associated with our
relocation to our new facilities in February 1998. Interest on the bank debt
accrues at a fixed rate of 8.42% and the bank debt matures on June 30, 2005.
 
     We may use a portion of the net proceeds of this offering to acquire
businesses, products and technologies that are complementary to ours. As of the
date of this prospectus, we are not engaged in any agreements or negotiations
regarding any material acquisition. We intend to use the balance of the net
proceeds of this offering for general corporate purposes, including the funding
of working capital requirements, increasing research and development
expenditures and investing in automation equipment for our manufacturing
facility. We currently have an option to purchase our facility in February 2000
for an aggregate purchase price of $5.6 million. We may use a portion of the net
proceeds of this offering to purchase this facility.
 
     Pending the use of the net proceeds of this offering, we intend to invest
the net proceeds in short-term, investment grade, interest bearing securities.
Other than as described above, we have no specific plans for the net proceeds of
this offering. Our management will have broad discretion concerning the
allocation and use of a significant portion of the net proceeds of this offering
to be received by us. The principal purposes for conducting this offering are to
create a public market for our common stock and to increase our financial
flexibility and working capital.
 
     The foregoing represents our best estimate of the allocation of the net
proceeds from the sale of the common stock offered by this prospectus, based
upon the current state of our business operations, our current plans for
expansion and the current economic and industry conditions. This estimate is
subject to reallocation among the categories stated above. The amount or timing
of actual expenditures will depend on numerous factors, including our
profitability, the availability of alternative financing, our business
development activities and competition.
 
                                DIVIDEND POLICY
 
     We have never declared or paid any cash dividends on our common stock. We
currently intend to retain any future earnings to finance the growth and
development of our business. Therefore, we do not anticipate that we will
declare or pay any cash dividends on our common stock in the foreseeable future.
Any future determination to pay cash dividends will be at the discretion of our
Board of Directors and will be dependent upon our financial condition, results
of operations, capital requirements, restrictions under any existing
indebtedness and such other factors as the Board of Directors deems relevant. In
addition, our bank debt contains restrictions on the payment of cash dividends
without the lender's prior written consent.
 
                                       20
   22
 
                                 CAPITALIZATION
 
     The following table sets forth the capitalization of ANSYS at December 31,
1998. The Pro Forma column gives effect to the payment of all undeclared
cumulative dividends on our preferred stock, the redemption of our outstanding
Series A redeemable preferred stock and the conversion of our outstanding Series
B convertible preferred stock into shares of our common stock. The Pro Forma As
Adjusted column additionally reflects the issuance of 2,500,000 shares of common
stock offered by this prospectus and the receipt and application of the
estimated net proceeds of this offering, assuming an initial public offering
price of $11.00 per share and after deducting underwriting discounts and
commissions and estimated offering expenses payable by ANSYS. This table should
be read in conjunction with our Consolidated Financial Statements and the Notes
thereto included elsewhere in this prospectus. See "Use of Proceeds" and
"Description of Capital Stock."
 


                                                       DECEMBER 31, 1998(1)
                                                ----------------------------------
                                                                        PRO FORMA
                                                ACTUAL    PRO FORMA    AS ADJUSTED
                                                ------    ---------    -----------
                                                          (IN THOUSANDS)
                                                              
Total long-term debt..........................  $1,894     $1,894        $    --
Stockholders' equity:
  Preferred stock, $.0001 par value; 5,000,000
     shares authorized; 18,000 shares issued
     and outstanding, actual; no shares issued
     and outstanding, pro forma and pro forma
     as adjusted..............................      --         --             --
  Common stock, $.0001 par value; 30,000,000
     shares authorized; 1,875,184 shares
     issued and outstanding, actual; 5,516,512
     shares issued and outstanding, pro forma;
     8,016,512 shares issued and outstanding,
     pro forma as adjusted....................      --         --             --
  Additional paid-in capital..................   1,834      1,434         26,459
  Retained earnings...........................   5,830      3,970          3,970
                                                ------     ------        -------
     Total stockholders' equity...............   7,664      5,404         30,429
                                                ------     ------        -------
          Total capitalization................  $9,558     $7,298        $30,429
                                                ======     ======        =======

 
- -------------------------
(1) Excludes 997,380 shares of common stock issuable upon the exercise of
    options outstanding as of January 31, 1999, at a weighted average exercise
    price of $1.65 per share. See "Management -- Stock Options" and Notes 9 and
    11 of Notes to Consolidated Financial Statements.
 
                                       21
   23
 
                                    DILUTION
 
     The pro forma net tangible book value of ANSYS as of December 31, 1998 was
approximately $5.3 million, or $0.96 per share of common stock. Pro forma net
tangible book value per share represents the amount of ANSYS' pro forma total
tangible assets less pro forma total liabilities divided by the pro forma number
of shares of common stock outstanding as of December 31, 1998. Without taking
into account any other changes in pro forma net tangible book value other than
to give effect to the sale by ANSYS of the 2,500,000 shares of common stock
offered by this prospectus and the receipt and application of the net proceeds
of this offering, the pro forma net tangible book value of ANSYS as of December
31, 1998, would have been $30.3 million, or $3.78 per share of common stock.
This represents an immediate increase in pro forma net tangible book value of
$2.82 per share to existing stockholders and an immediate dilution in pro forma
net tangible book value of $7.22 per share to investors purchasing common stock
in this offering.
 
     The following table illustrates this per share dilution:
 

                                                           
Assumed initial public offering price per share.......           $11.00
  Pro forma net tangible book value per share as of
     December 31, 1998................................  $0.96
  Increase per share attributable to new investors....   2.82
                                                        -----
Pro forma net tangible book value per share after this
  offering............................................             3.78
                                                                 ------
Dilution per share to new investors...................           $ 7.22
                                                                 ======

 
     The following table summarizes, on a pro forma basis as of December 31,
1998, the difference between the number of shares of common stock purchased from
ANSYS, the total consideration paid and the average price per share paid by
existing stockholders and by new investors, assuming an initial public offering
price of $11.00 per share and before deducting estimated underwriting discounts
and commissions and estimated offering expenses payable by ANSYS:
 


                               SHARES PURCHASED       TOTAL CONSIDERATION      AVERAGE
                              -------------------    ---------------------      PRICE
                               NUMBER     PERCENT      AMOUNT      PERCENT    PER SHARE
                              ---------   -------    -----------   -------    ---------
                                                               
     Existing
  stockholders..............  5,516,512     68.8%    $ 1,850,000      6.3%     $ 0.34
     New investors..........  2,500,000     31.2      27,500,000     93.7       11.00
                              ---------    -----     -----------    -----
          Total.............  8,016,512    100.0%    $29,350,000    100.0%
                              =========    =====     ===========    =====

 
     The foregoing table assumes no exercise of the underwriters' over-allotment
option or shares underlying outstanding options. As of January 31, 1999, options
to purchase 997,380 shares of our common stock were outstanding at a weighted
average exercise price of $1.65 per share. To the extent that these options are
exercised, new investors will experience further dilution. See
"Management -- Stock Option Plans" and Note 9 of Notes to Consolidated Financial
Statements.
 
                                       22
   24
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
     The following selected consolidated financial data as of December 31, 1997
and 1998 and for each of the years ended December 31, 1996, 1997 and 1998 was
derived from, and should be read in conjunction with, ANSYS' Consolidated
Financial Statements and Notes thereto audited by McGladrey & Pullen, LLP,
independent auditors, included elsewhere herein. Selected consolidated financial
data as of December 31, 1994, 1995 and 1996 and for the years ended December 31,
1994 and 1995 has been derived from ANSYS' unaudited consolidated financial
statements not included herein. The following data should be read in conjunction
with "Management's Discussion and Analysis of Financial Condition and Results of
Operations" and the Consolidated Financial Statements and Notes thereto,
included elsewhere in this prospectus.
 


                                                                            YEARS ENDED DECEMBER 31,
                                               ----------------------------------------------------------------------------------
                                                    1994             1995             1996             1997             1998
                                               --------------   --------------   --------------   --------------   --------------
                                                                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
                                                                                                    
STATEMENT OF OPERATIONS DATA:
  Net sales..................................     $ 6,589          $ 6,447          $ 8,126          $10,698          $18,964
  Cost of goods sold.........................       2,001            2,269            3,058            5,099            9,703
                                                  -------          -------          -------          -------          -------
  Gross profit...............................       4,588            4,178            5,068            5,599            9,261
  Operating expenses:
    Research and development.................         663              561              434              773              700
    Selling, general and administrative......       2,454            2,803            2,770            2,876            4,049
                                                  -------          -------          -------          -------          -------
    Total operating expenses.................       3,117            3,364            3,204            3,649            4,749
                                                  -------          -------          -------          -------          -------
  Operating income...........................       1,471              814            1,864            1,950            4,512
  Interest income (expense)..................        (100)              20               55               59              (46)
                                                  -------          -------          -------          -------          -------
  Income before income taxes.................       1,371              834            1,919            2,009            4,466
  Provision for income taxes.................         400              340              718              803            1,775
                                                  -------          -------          -------          -------          -------
  Net income.................................     $   971          $   494          $ 1,201          $ 1,206          $ 2,691
                                                  =======          =======          =======          =======          =======
  Earnings per share(1):
    Basic....................................     $  0.34          $  0.14          $  0.46          $  0.54          $  1.33
    Diluted..................................     $  0.15          $  0.08          $  0.19          $  0.20          $  0.45
  Weighted average shares outstanding(1):
    Basic....................................       2,307            2,307            2,230            1,901            1,890
    Diluted..................................       6,039            6,076            6,057            5,864            5,942
  Pro forma earnings per share(1):
    Basic....................................     $  0.16          $  0.08          $  0.20          $  0.21          $  0.47
    Diluted..................................     $  0.16          $  0.08          $  0.19          $  0.20          $  0.44
  Pro forma weighted average shares
    outstanding(1):
    Basic....................................       6,154            6,154            6,077            5,748            5,737
    Diluted..................................       6,244            6,282            6,262            6,069            6,147

 


                                                                                                   DECEMBER 31, 1998
                                                   DECEMBER 31,                        ------------------------------------------
                               -----------------------------------------------------                     PRO         PRO FORMA
                                  1994          1995          1996          1997         ACTUAL       FORMA(2)     AS ADJUSTED(3)
                               -----------   -----------   -----------   -----------   -----------   -----------   --------------
                                                                         (IN THOUSANDS)
                                                                                              
BALANCE SHEET DATA:
  Cash and cash
    equivalents.............     $1,535        $1,247        $1,784        $1,515        $ 3,176       $   916        $24,047
  Working capital...........      1,553         2,242         3,120         3,002          5,053         2,793         26,148
  Total assets..............      4,041         3,668         4,855         6,893         11,891         9,631         32,762
  Total long-term debt......         --            --            --            --          1,894         1,894             --
  Total stockholders'
    equity..................      2,609         3,083         3,973         4,957          7,664         5,404         30,429

 
- -------------------------
(1) See Notes 10 and 11 of Notes to Consolidated Financial Statements for
    information regarding the determination of per share calculations.
 
(2) Pro forma to give effect to: (a) the payment of all undeclared cumulative
    dividends on our preferred stock; (b) the redemption of our outstanding
    Series A redeemable preferred stock; and (c) the conversion of our
    outstanding Series B convertible preferred stock, all of which will occur
    upon consummation of this offering.
 
(3) Pro forma as described in footnote (2) and as adjusted to give effect to the
    receipt and application of the estimated net proceeds from the sale of the
    2,500,000 shares offered by this prospectus. See "Use of Proceeds."
 
                                       23
   25
 
                      MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     THE FOLLOWING DISCUSSION OF THE FINANCIAL CONDITION AND RESULTS OF
OPERATIONS OF ANSYS SHOULD BE READ IN CONJUNCTION WITH "SELECTED CONSOLIDATED
FINANCIAL DATA" AND CONSOLIDATED FINANCIAL STATEMENTS AND NOTES THERETO,
INCLUDED ELSEWHERE IN THIS PROSPECTUS.
 
OVERVIEW
 
     ANSYS was organized in 1988 to acquire the Analytical Systems division of
Marion Laboratories, Inc. Since our inception, we have financed our working
capital requirements primarily from cash provided by operations. In 1995, we
completed the repayment of indebtedness incurred in connection with the
acquisition from Marion Laboratories.
 
     We commenced our collaborative relationship with Roche in 1992, and began
developing products for the on-site drug testing markets. We believe on-site
testing represents the principal opportunity for growth in the drug testing
market. In 1991, we introduced our first on-site product, ON-SITE Alcohol, a
self-contained, disposable, pocket-sized test for the detection of ethanol in
urine or saliva. TesTcup, introduced in 1995, and TesTstik, introduced in 1997,
were developed in collaboration with Roche as disposable, rapid screening tests
for certain drugs of abuse in urine. We manufacture both of these products for
Roche under exclusive agreements. During 1996, 1997 and 1998, our sales of
on-site diagnostic products (including our proprietary product, ON-SITE Alcohol,
which is also distributed by Roche) accounted for 17%, 42% and 65% of our total
net sales, respectively. TOXI-LAB, our first laboratory-based drug testing
product, was introduced by our predecessor in 1978. TOXI-LAB is a broad spectrum
drug screening system that uses our proprietary membranes.
 
     We introduced SPEC, our first specialty laboratory and research product, in
1990. In addition, we began manufacturing nucleic acid isolation products for
Promega in 1996. Since 1997, we have also been developing rapid nucleic acid
separation and detection products in conjunction with Molecular Innovations.
 
RESULTS OF OPERATIONS
 
     The following table sets forth certain income statement items expressed as
a percentage of net sales for the periods indicated:
 


                                                          YEARS ENDED DECEMBER 31,
                                                         --------------------------
                                                          1996      1997      1998
                                                         ------    ------    ------
                                                                    
Net sales..............................................  100.0%    100.0%    100.0%
                                                         -----     -----     -----
Gross profit...........................................   62.3      52.3      48.8
Operating expenses:
  Research and development.............................    5.3       7.2       3.7
  Selling, general and administrative..................   34.1      26.9      21.3
Total operating expenses...............................   39.4      34.1      25.0
Operating income.......................................   22.9      18.2      23.8
Interest income (expense)..............................    0.7       0.6      (0.2)
Income before income taxes.............................   23.6      18.8      23.6
Provision for income taxes.............................    8.8       7.5       9.4
Net income.............................................   14.8      11.3      14.2

 
                                       24
   26
 
  YEARS ENDED DECEMBER 31, 1998 AND 1997
 
     NET SALES. Net sales for the year ended December 31, 1998 were $19.0
million compared to $10.7 million for 1997, representing an increase of 77.3%.
The increase in net sales of $8.3 million was primarily attributable to unit
volume increases in on-site products, primarily higher sales of TesTstik, which
was introduced in October 1997.
 
     GROSS PROFIT. Gross profit for the year ended December 31, 1998 was $9.3
million compared to $5.6 million for 1997, representing an increase of 65.4%. As
a percentage of net sales, gross profit decreased to 48.8% in the year ended
December 31, 1998 compared to 52.3% for 1997. The decrease as a percentage of
net sales reflects an increasing percentage of total net sales of on-site
products, which generally carry lower gross margins than our laboratory
products.
 
     RESEARCH AND DEVELOPMENT EXPENSE. Research and development expense
primarily consists of payroll and related expenses, material expenses and
facility costs associated with our development of new technologies and products.
Research and development expense for the year ended December 31, 1998 was
$700,000 compared to $773,000 for 1997, representing a decrease of 9.4%. As a
percentage of net sales, research and development expense decreased to 3.7% for
the year ended December 31, 1998 from 7.2% for 1997. We anticipate that research
and development expense will increase significantly in future periods, both in
dollar amount and as a percentage of net sales, as we begin to implement a more
active product development strategy.
 
     SELLING, GENERAL AND ADMINISTRATIVE EXPENSE. Selling, general and
administrative expense primarily consists of compensation and related expenses
for sales and marketing, technical support, executive, accounting and
administrative personnel, travel expenses, advertising and product promotion
costs, insurance costs, facilities costs, and accounting, legal and other
general corporate expenses. Selling, general and administrative expense for the
year ended December 31, 1998 was $4.0 million compared to $2.9 million for 1997,
representing an increase of 40.8%. The increase in selling, general and
administrative expense was due to increased compensation expense associated with
the growth of our workforce. As a percentage of net sales, selling, general and
administrative expense decreased to 21.3% for the year ended December 31, 1998
from 26.9% for 1997. The decrease as a percentage of net sales was due to the
effective use of our infrastructure to support higher volumes of net sales, the
realization of improved operating efficiencies and proportionately lower selling
expenses associated with increased sales of products marketed by Roche.
 
     INTEREST INCOME (EXPENSE). Interest expense for the year ended December 31,
1998 was $46,000 compared to interest income of $59,000 for 1997, reflecting our
increased borrowings during 1998 for the purchase of equipment and leasehold
improvements in our new corporate headquarters and manufacturing facility, which
we occupied in February 1998.
 
     PROVISION FOR INCOME TAXES. Provision for income taxes for the year ended
December 31, 1998 was $1.8 million compared to $803,000 for 1997. The increase
in provision for income taxes was due to our increased profitability.
 
     NET INCOME. Net income for the year ended December 31, 1998 was $2.7
million compared to $1.2 million for 1997, representing an increase of 123.1%.
As a percentage of net sales, net income increased to 14.2% for the year ended
December 31, 1998 from 11.3% for 1997.
 
                                       25
   27
 
  YEARS ENDED DECEMBER 31, 1997 AND 1996
 
     NET SALES. Net sales for the year ended December 31, 1997 were $10.7
million compared to $8.1 million for 1996, representing an increase of 31.7%.
The increase in net sales of $2.6 million was principally attributable to
increased on-site product unit volume, primarily associated with higher sales of
TesTcup.
 
     GROSS PROFIT. Gross profit for the year ended December 31, 1997 was $5.6
million compared to $5.1 million for 1996, representing an increase of 10.5%. As
a percentage of net sales, gross profit decreased to 52.3% in the year ended
December 31, 1997 compared to 62.3% for 1996. The decrease as a percentage of
net sales reflects an increasing percentage of total net sales of on-site
products, which generally carry lower gross margins than our laboratory
products. The decrease as a percentage of net sales also reflects certain raw
material and production process problems that occurred in the second quarter of
1997.
 
     RESEARCH AND DEVELOPMENT EXPENSE. Research and development expense for the
year ended December 31, 1997 was $773,000 compared to $434,000 for 1996,
representing an increase of 78.1%. As a percentage of net sales, research and
development expense increased to 7.2% for the year ended December 31, 1997 from
5.3% for 1996. The increase in research and development expenses was due to
expense associated with the development of the TesTstik product that was
introduced in October 1997.
 
     SELLING, GENERAL AND ADMINISTRATIVE EXPENSE. Selling, general and
administrative expense for the year ended December 31, 1997 was $2.9 million
compared to $2.8 million for 1996, representing an increase of 3.8%. As a
percentage of net sales, selling, general and administrative expense decreased
to 26.9% for the year ended December 31, 1997 from 34.1% for 1996. The decrease
as a percentage of net sales was due to the effective use of our infrastructure
to support higher volumes of net sales, the realization of improved operating
efficiencies, and proportionately lower selling expenses associated with
increased sales of products marketed by Roche.
 
     INTEREST INCOME (EXPENSE). Interest income for the year ended December 31,
1997 was $59,000 compared to $55,000 for 1996, representing an increase of 7.3%.
 
     PROVISION FOR INCOME TAXES. Provision for income taxes for the year ended
December 31, 1997 was $803,000 compared to $718,000 for 1996. The increase in
the provision for income taxes was due to our increased profitability.
 
     NET INCOME. Net income for each of the years ended December 31, 1997 and
1996 was $1.2 million. As a percentage of net sales, net income decreased to
11.3% for the year ended December 31, 1997 from 14.8% for 1996.
 
                                       26
   28
 
QUARTERLY RESULTS OF OPERATIONS
 
     The following tables present unaudited quarterly results of operations, in
dollar amounts and as a percentage of net sales, for the last eight quarters,
that have been derived from the unaudited consolidated financial statements of
ANSYS. The information has been prepared by us on a basis consistent with our
audited financial statements and includes all adjustments, consisting only of
normal recurring adjustments, which management considers necessary for a fair
presentation of the information for the periods presented.
 


                                                                THREE MONTHS ENDED
                                  -------------------------------------------------------------------------------
                                                   1997                                     1998
                                  --------------------------------------   --------------------------------------
                                  MAR. 31   JUNE 30   SEPT. 30   DEC. 31   MAR. 31   JUNE 30   SEPT. 30   DEC. 31
                                  -------   -------   --------   -------   -------   -------   --------   -------
                                                       (IN THOUSANDS, EXCEPT PER SHARE DATA)
                                                                                  
STATEMENT OF OPERATIONS DATA:
    Net sales...................  $2,400    $2,395     $2,551    $3,352    $4,427    $4,597     $4,883    $5,057
    Gross profit................   1,426     1,087      1,356     1,730     2,263     2,307      2,471     2,220
    Operating expenses:
      Research and
         development............     173       178        215       207       174       163        179       184
      Selling, general and
         administrative.........     732       705        694       745       902       991      1,216       940
                                  ------    ------     ------    ------    ------    ------     ------    ------
         Total operating
           expenses.............     905       883        909       952     1,076     1,154      1,395     1,124
                                  ------    ------     ------    ------    ------    ------     ------    ------
    Operating income............     521       204        447       778     1,187     1,153      1,076     1,096
    Interest income (expense)...      18        26          7         8        (4)      (14)       (14)      (14)
                                  ------    ------     ------    ------    ------    ------     ------    ------
    Income before income
      taxes.....................     539       230        454       786     1,183     1,139      1,062     1,082
    Provision for income
      taxes.....................     214        99        181       309       467       482        417       409
                                  ------    ------     ------    ------    ------    ------     ------    ------
    Net income..................  $  325    $  131     $  273    $  477    $  716    $  657     $  645    $  673
                                  ======    ======     ======    ======    ======    ======     ======    ======
    Earnings per share:
      Basic.....................  $ 0.14    $ 0.05     $ 0.12    $ 0.23    $ 0.36    $ 0.32     $ 0.32    $ 0.33
      Diluted...................  $ 0.05    $ 0.02     $ 0.05    $ 0.08    $ 0.12    $ 0.11     $ 0.10    $ 0.11
 
AS A PERCENTAGE OF NET SALES:
    Net sales...................   100.0%    100.0%     100.0%    100.0%    100.0%    100.0%     100.0%    100.0%
                                  ------    ------     ------    ------    ------    ------     ------    ------
    Gross profit................    59.4      45.4       53.2      51.6      51.1      50.2       50.6      43.9
    Operating expenses:
      Research and
         development............     7.2       7.4        8.4       6.2       3.9       3.5        3.7       3.6
      Selling, general and
         administrative.........    30.5      29.5       27.3      22.2      20.4      21.6       24.9      18.6
         Total operating
           expenses.............    37.7      36.9       35.7      28.4      24.3      25.1       28.6      22.2
    Operating income............    21.7       8.5       17.5      23.2      26.8      25.1       22.0      21.7
    Interest income (expense)...     0.8       1.1        0.3       0.2      (0.1)     (0.3)      (0.3)     (0.3)
    Income before income
      taxes.....................    22.5       9.6       17.8      23.4      26.7      24.8       21.7      21.4
    Provision for income
      taxes.....................     9.0       4.1        7.1       9.2      10.5      10.5        8.5       8.1
    Net income..................    13.5       5.5       10.7      14.2      16.2      14.3       13.2      13.3

 
     Our quarterly operating results have fluctuated in the past and may
continue to fluctuate in the future based on a number of factors, not all of
which are in our control. For example, during the second quarter of 1997, we
experienced a decline in gross profit largely as a result of raw material and
production process problems. See "Risk Factors -- Our Quarterly Operating
Results Fluctuate as a Result of Many Factors" and "Risk Factors -- We Depend on
Sole Source Suppliers for Raw Materials."
 
                                       27
   29
 
LIQUIDITY AND CAPITAL RESOURCES
 
     The primary source of liquidity for ANSYS has been cash generated from
operations and borrowings under our revolving credit facility and secured term
note payable.
 
     Cash flows from operating activities were $1.1 million, $625,000 and $3.1
million for the years ended December 31, 1996, 1997 and 1998, respectively.
During the year ended December 31, 1998, expenditures for equipment and
leasehold improvements at our new manufacturing and corporate headquarters
facility, where we commenced occupancy in February 1998, were $2.4 million.
Expenditures for leasehold improvements were financed by a seven-year term loan
in the principal amount of $2.0 million, which bears interest at the rate of
8.42% per annum and is secured by our accounts receivable, inventories,
equipment and intangible assets. We also have a revolving line of credit of $1.0
million to provide for short-term financing. At December 31, 1998, we had no
outstanding balance under this line of credit.
 
     Working capital at December 31, 1998 amounted to $5.1 million, compared to
$3.0 million at December 31, 1997. Cash and cash equivalents amounted to $3.2
million at December 31, 1998, compared to $1.5 million at December 31, 1997.
 
     Our primary short-term capital requirements are for increasing the level of
automation of our production lines and increased research and development
activity. We currently plan to spend approximately $1.0 million annually over
the next several years for the expansion and development of our manufacturing
capabilities. We expect our research and development expenses to increase
significantly over the next several years as we expand our product development
activity. Our future liquidity and capital funding requirements will depend on
numerous factors. See "Risk Factors -- We May Need to Raise Additional Capital."
 
YEAR 2000 COMPLIANCE
 
     Many existing computer systems and applications, as well as other control
devices, use only two digits to identify a year in the date field, without
considering the impact of the upcoming change in the century. As a result, such
systems and applications could fail or create erroneous results unless corrected
so that they can process data related to the year 2000. We rely on our systems
and applications in operating and monitoring all major aspects of our business,
including our financial systems. While we believe our internal systems are year
2000 compliant, we will not know the full extent of the impact of those issues
until the turn of the century. Any disruption in our information systems could
cause shipment errors, make it more difficult to obtain certain raw materials or
to forecast adequately, cause business interruptions, harm our customer
relationships, and in general, adversely affect our business. We also rely,
directly and indirectly, on external systems of our customers, suppliers,
creditors and financial organizations, both domestic and international, for the
accurate exchange of data. Even if the year 2000 issue does not affect our
internal systems, we could be affected through disruptions in the operations of
the enterprises with which we interact. Despite our efforts to address the
impact of the year 2000 issues on our own internal systems, the impact of year
2000 issues on other enterprises could adversely affect our business.
 
     In 1997, we developed a three-phase program for year 2000 information
systems compliance. Phase I was to identify those systems with which we have
exposure to year 2000 issues. Phase II is the development and implementation of
action plans to be year
 
                                       28
   30
 
2000 compliant. Phase III, to be completed by mid-1999, is the final testing of
each major area of exposure to ensure compliance. We have identified three major
areas determined to be critical for successful year 2000 compliance: (1)
financial and informational system applications; (2) manufacturing applications;
and (3) third party relationships.
 
     In accordance with Phase I of the program, we have conducted an internal
review of all systems and have contacted all software suppliers to determine
major areas of exposure to year 2000 issues. In the financial and information
system area, a number of applications have been identified as being year 2000
compliant due to their recent implementation. We believe that our financial
reporting and manufacturing systems are year 2000 compliant. In the third party
area, we are also in the process of contacting most of the entities with which
we have a material third party relationship. To date, those who have responded
state that they intend to be year 2000 compliant by year 2000. We have not yet
determined what costs may be incurred in connection with our third party
relationships, but such costs could be substantial.
 
     To date, we believe our expenses to address the year 2000 problem have
totaled less than $100,000. We believe there will be no additional material
expenditures necessary to replace our core financial, reporting and
manufacturing systems. We currently have no contingency plans to address any
unforeseen year 2000 problems.
 
                                       29
   31
 
                                    BUSINESS
 
GENERAL
 
     ANSYS develops, manufactures and markets drug testing products for both
on-site and laboratory settings, as well as specialty laboratory and research
products. Our on-site drug testing products are self-contained, easy to use,
disposable tests which detect the presence of drugs of abuse and alcohol, and
provide highly accurate results in less than five minutes. These products are
used in a variety of applications, including pre-employment screening, random
employee testing, government mandated testing and parole and probation
monitoring, as well as in other applications that require rapid, accurate
results. Our laboratory-based drug testing product line, sold under the name
TOXI-LAB, can accurately detect more than 500 drugs and drug byproducts in
urine, blood, tissue and other specimens. TOXI-LAB is primarily used by hospital
and forensic laboratories.
 
     ANSYS also develops, manufactures and markets specialty laboratory and
research products. Our SPEC products are used for a variety of analytical
applications, including drugs of abuse confirmation testing, therapeutic drug
monitoring and sample preparation in drug discovery and drug metabolism studies.
Our nucleic acid separation and detection products are used by clinical and
environmental testing laboratories, pharmaceutical and biotechnology companies
and DNA testing and research organizations.
 
STRATEGY
 
     We seek to strengthen our competitive position in the drug testing and
specialty laboratory and research markets by pursuing the following strategies:
 
     EMPLOY MARKET DRIVEN PRODUCT DEVELOPMENT. Our product development strategy
is to adapt and enhance our diagnostic testing technologies, our engineering,
production and chemistry capabilities and our product formats in response to
customer demands. To accomplish this, we monitor existing markets, maintain a
continuing dialogue with our current customers through workshops and technical
consultation hotlines, and assist our customers in identifying new needs as they
develop.
 
     FOCUS ON STRATEGIC RELATIONSHIPS. We seek to enhance our present
relationships with companies such as Roche and Molecular Innovations, as well as
to develop new strategic relationships. We have collaborated with Roche for more
than six years, and continue to work with Roche both contractually and
informally in developing new products, such as TesTcup ER, for the drug testing
markets. In addition, we have formed a strategic relationship with Molecular
Innovations to develop rapid nucleic acid separation and detection products. We
believe we are in a position to attract and develop additional strategic
relationships because of our innovative design and development expertise and
efficient manufacturing capability. We intend to target licensing and
distribution partners whose strong sales and marketing capabilities will enable
them to promote and sell our products more effectively.
 
     ACCELERATE DEVELOPMENT OF NEW DRUG TESTING PRODUCTS. We emphasize
innovation in the design and development of products that address the needs of
our target markets. We intend to accelerate new drug testing product development
by hiring additional scientific and technical personnel, investing additional
resources in research and development, and pursuing joint research and
development arrangements with companies that offer complementary resources.
 
                                       30
   32
 
     INCREASE EMPHASIS ON SPECIALTY LABORATORY AND RESEARCH PRODUCTS. We intend
to focus a significant portion of our product development effort on expanding
our specialty laboratory and research product line. We believe a substantial
market exists for these products in a variety of diagnostic applications. We
plan to develop additional nucleic acid purification and separation products, as
well as complete kits for performing the laboratory work required to isolate and
purify nucleic acids. We also plan to expand our sample preparation product line
to accommodate a wider variety of automated sample processing equipment.
 
     ACHIEVE MANUFACTURING EFFICIENCIES THROUGH AUTOMATION. We are currently
incorporating sophisticated automation equipment into our manufacturing facility
in order to automate certain portions of our production processes. We are
continually evaluating our manufacturing processes to identify additional
automation opportunities. By installing custom-designed, state of the art
manufacturing systems, we believe we can further enhance productivity and
improve cost-efficiency while maintaining our high level of product quality.
 
     PURSUE STRATEGIC ACQUISITIONS. We intend to examine opportunities to
acquire, license or enter into supply arrangements to obtain innovative
diagnostic testing technologies, product formats and products that complement
our existing operations and address the needs of our target customer base. We
regularly identify and review strategic acquisition opportunities through our
industry contacts and recognized position in the industry, as well as through
dialogue with our strategic partners.
 
THE DRUG TESTING MARKET
 
     According to an independent research company, the market for drugs of abuse
testing products in the United States was approximately $628 million in 1996,
and will increase to approximately $900 million by 2002. Drug testing has
historically consisted primarily of urine-based screening performed in reference
laboratories. Specimens are collected and sent to these laboratories, where
skilled technicians process the specimens and document test procedures and
results. Laboratory testing is typically carried out on sophisticated analyzers,
which use automated liquid handling mechanisms for the addition of chemical
solutions and rely on absorption or fluorescence of light, or other detection
methods to determine the presence and amount of substances in the specimen.
 
     Laboratory instruments are generally capable of detecting multiple
substances from a large number of specimens, and provide accurate and highly
sensitive test results. Laboratory testing, however, has several limitations.
Laboratory instruments are generally large, complex and costly. They require
high specimen throughput to justify the required investment in equipment,
training and staffing, as well as the costs required to operate and support
these instruments. Generally, the turnaround time for test results in reference
laboratories is measured in hours and days. In addition, laboratory testing in
which a large number of samples must be handled creates special challenges in
meeting chain of custody requirements. Chain of custody refers to the
documentation of the transportation and handling of the specimen from the time
of collection until the specimen is analyzed in a laboratory and ultimately
discarded. Chain of custody requirements are primarily designed to ensure that a
specimen is correctly associated with a given individual and has not been
adulterated. All specimens must be accompanied by chain of custody forms and be
in specially sealed, tamper-evident containers.
 
                                       31
   33
 
     The limitations of laboratory testing, combined with technological advances
permitting accurate testing outside the laboratory, have resulted in a
continuing shift to simple, rapid, self-contained, disposable diagnostic tests
that can be performed in a variety of on-site settings. On-site tests have been
developed in a number of formats, including lateral flow and flow-through
membrane devices, dipsticks and test tubes. These tests are intended to generate
accurate results that provide either a yes/no answer or a quantitative result,
primarily through a color change. When an on-site drug test indicates the
presence of a drug, the samples are routinely subjected to confirmation testing,
typically performed in an off-site laboratory. We believe that the on-site
segment of the drug testing market has experienced substantially higher growth
in recent years than the traditional laboratory-based market segment. While we
believe that laboratory testing will continue to play an important role in drug
testing, particularly confirmation testing, we also believe that on-site testing
will be increasingly used in the following applications:
 
     WORKPLACE DRUG TESTING. Drugs of abuse testing in the workplace includes
pre-employment screening, random employee testing and government mandated
testing. According to the United States Substance Abuse Mental Health Services
Administration, over 13 million people in the United States in 1996 were illicit
drug users. The U.S. Department of Labor estimates that over 70% of illegal drug
users are employed. In addition, the Society for Human Resources Management
estimates that approximately 95% of Fortune 500 companies conduct pre-employment
drug screening. Corporations are using drug screening in the workplace with the
intention of reducing workers' compensation claims, absenteeism, employee
turnover, accidents, health care costs and generally creating a safer workplace.
Drugs of abuse testing in the workplace has experienced significant growth in
recent years due to various factors, including: (1) government regulations which
mandate testing in certain job categories; (2) the Federal Drug-Free Workplace
Act of 1988; (3) court decisions recognizing a private sector employer's right
to test both employees and job applicants; (4) efforts by insurance carriers to
reduce accident liability and control health care costs; and (5) corporate
requirements that vendors and contractors certify that their workplaces are drug
free.
 
     Historically, workplace drug testing has been performed primarily in
reference laboratories or hospital-based laboratories. Recently, however, an
increasing portion of workplace drug testing has been performed using tests that
can be easily administered on-site. The SmithKline Beecham Drug Testing Index
indicated that only 5% of the nearly 5 million workplace drug tests performed in
1997 by SmithKline's clinical laboratories were positive for illegal substances.
On-site drug tests are particularly valuable in settings like this because they
enable employers to permit the large number of employees whose test results are
negative to enter or return to the workforce without undue delay.
 
     GOVERNMENT MANDATED DRUG TESTING. Several government agencies screen their
workers for drugs of abuse, while others mandate drug testing of certain persons
subject to monitoring. For example, the United States Department of
Transportation has established mandatory guidelines for random drug testing of
workers involved in the transportation industry, including airline pilots, truck
drivers and rail employees. The Department of Transportation's regulations
currently require 50% of its regulated workers, or approximately four million
persons, to be randomly tested for drugs each year. State parole and probation
agencies test subjects for suspected drug and alcohol abuse if there is
behavioral evidence of abuse. According to the U.S. Department of Justice,
approximately 3.8 million people are on parole or probation in the United
States, and one-third of them are subject to mandatory drug testing.
 
                                       32
   34
 
     Other government agencies have implemented extensive pre-employment drug
screening programs. For example, the United States Postal Service has
implemented a pilot drug screening program using TesTcup that will require
approximately 250,000 on-site drug tests. The United States military also
routinely performs drug screens on all recruits, as well as random tests and
testing for cause.
 
     HOSPITAL/EMERGENCY ROOM DRUG TESTING. Drug abuse plays a role in many
emergency room visits, either as a primary cause such as an overdose, or as a
contributing factor such as in an accident. When an emergency room physician
receives a patient with symptoms that may or may not be drug related, that
physician must quickly determine the presence of drugs in order to prescribe the
correct treatment. Currently, most emergency room drugs of abuse testing
procedures are performed away from the patient at the hospital laboratory, a
process which can take several hours to produce a result. Tests have also been
developed for on-site use in the emergency room, but most of these tests require
multiple steps, are time-sensitive and are cumbersome to use. We believe that a
diagnostic test that could be easily performed by nontechnical personnel in
order to rapidly diagnose drugs of abuse in the emergency room would be of
substantial benefit in determining the appropriate course of treatment.
 
     THERAPEUTIC DRUG MONITORING. We believe that a significant opportunity
exists for rapid, easy to use on-site diagnostic products in therapeutic drug
monitoring, an area also traditionally addressed by laboratory testing products.
Many therapeutic drugs require complicated dosing regimens in order for the drug
to be effective. The failure of patients to take their medications as prescribed
could lead physicians to improperly prescribe treatment in an effort to achieve
the desired effect. As a result, physicians may desire to periodically monitor
their patients to validate compliance with prescribed treatment. Currently, most
physicians monitor therapeutic drugs by sending a urine or blood sample to a
central laboratory for analysis. This process can be time consuming and can add
significant cost to the overall treatment. Thus, physicians may be unable to
employ monitoring as frequently as they might desire. The ability to rapidly
monitor the presence of therapeutic drugs or their byproducts while the patient
is in the physician's office would provide the physician with real-time
information that could improve patient treatment.
 
     OTHER DRUG TESTING APPLICATIONS. We believe there is a growing demand for
rapid, accurate, easy to use drug testing products in drug treatment centers. We
also believe there is a substantial over-the-counter market for rapid drug
screening devices that will be used by small employers, academic institutions,
private counselors, physicians and concerned parents.
 
THE SPECIALTY LABORATORY AND RESEARCH PRODUCTS MARKET
 
     Clinical and environmental testing laboratories, pharmaceutical and
biotechnology companies and DNA testing and research organizations frequently
conduct research on samples that must be isolated and purified prior to
analysis. This isolation and purification process is known as sample
preparation. Sample preparation is important in these specialty laboratory and
research settings because impurities in a sample can cause test results that are
inaccurate, unreliable or cannot be reproduced. Historically, sample preparation
has been a labor and time-intensive process. In recent years, however,
traditional sample preparation methods have begun to be replaced with reliable,
fast and high quality technologies and products. Two important segments of the
specialty laboratory and research products market are solid phase extraction and
nucleic acid separation.
 
                                       33
   35
 
     SOLID PHASE EXTRACTION. Sample preparation products are used to separate
both solid and liquid components using various techniques including filtration,
chromatography (chemical separation), centrifugation (physical separation by
rotational force), solid phase extraction and liquid extraction techniques.
Solid phase extraction is a technique for removal of a target substance from a
liquid onto a solid surface and the subsequent release of the substance for
analysis. Solid phase extraction techniques are employed for sample preparation
in drug discovery and drug metabolism studies in the pharmaceutical and clinical
laboratory industries. Biomedical laboratories use solid phase extraction to
prepare samples for drugs of abuse confirmation, therapeutic drug monitoring and
other applications. Environmental testing laboratories also use solid phase
extraction for sample preparation of drinking water and waste water analysis
under the guidelines of the EPA. Biotechnology laboratories also use solid phase
extraction for isolating DNA from biological matrices.
 
     NUCLEIC ACID SEPARATION. Nucleic acid separation involves isolating nucleic
acids from other soluble contaminants. Nucleic acids, including DNA and RNA, are
the fundamental regulatory molecules of life. Over the past 20 years, an
increased understanding of nucleic acid structure and function has led to the
use of nucleic acids in a broad array of therapeutic and diagnostic
applications. All of these applications require highly purified nucleic acids.
Pure nucleic acids are essential for reliability and reproducibility of
molecular biology experiments in both academic and industrial research
laboratories, as well as for the accuracy of results in nucleic acid-based
clinical diagnostics. Most nucleic acid separation and purification occurs in
laboratories using specialized equipment. In addition, because the results of
nucleic acid testing can be compromised due to contamination of the testing
environment, and because handling requirements must be strictly followed,
individuals specially trained in molecular biology typically conduct these
procedures. In addition to a need for improved nucleic acid separation products
in the laboratory, we believe there are a number of potential applications for
on-site nucleic acid testing. For example, on-site nucleic acid tests could be
used to detect microorganisms in drinking water and other liquids, or viral or
bacterial contamination in environmental samples.
 
ANSYS PRODUCTS AND PRODUCTS UNDER DEVELOPMENT
 
  DRUG TESTING PRODUCTS
 
     We develop products that we believe address many of the limitations of
traditional laboratory and on-site testing products. We have applied our core
competencies in product design, engineering and manufacturing to bring to market
products for drugs of abuse and alcohol testing and are developing new products
for these applications as well as for new applications such as therapeutic drug
monitoring. We intend to continue to develop, manufacture and sell products
which are designed to meet the changing needs of the diagnostic testing markets
and offer some or all of the following attributes:
 
     - EASE OF USE.  TesTcup, TesTstik, ON-SITE Alcohol and the on-site products
       under development are designed to be easy to use, read and interpret.
       These tests are portable, self-contained and disposable, and eliminate
       the need to handle the specimen and/or mix and dispense chemical
       solutions. Test results from these products are provided in a
       "positive/negative" color change format that is designed to be clear and
       easy to read and interpret. In addition, TesTcup features specimen
       collection and testing in a single, integrated device, which effectively
       addresses strict chain of custody requirements.
 
                                       34
   36
 
     - IMMEDIATE RESULTS.  TesTcup, TesTstik, ON-SITE Alcohol and the on-site
       products under development are designed to offer complete test results in
       under five minutes, allowing employers, government testing
       administrators, health care professionals and other customers to take
       appropriate action immediately. By contrast, processing of tests in
       reference or hospital laboratories can require hours or days to obtain
       results. In addition, our products do not require refrigeration and
       remain stable at room temperature, making them immediately available for
       use. TesTcup ER, a version of TesTcup designed specifically for the
       hospital emergency room, is intended to be a cost-effective means to
       shorten time to medical intervention and to minimize the need for
       additional patient follow-up.
 
     - ANALYTICAL ACCURACY.  The on-site products developed by ANSYS are
       designed to provide accurate and reproducible results, comparable to
       results obtained in a reference or hospital laboratory using complex
       laboratory analyzers. In addition, our TOXI-LAB system is designed to
       provide high analytical accuracy and identifying power similar to
       instrument based methods.
 
     - MULTI-SUBSTANCE TESTING CAPABILITY. TesTcup and TOXI-LAB, as well as
       certain other products under development, are designed to measure
       multiple target substances simultaneously without sacrificing the quality
       of the individual analysis. We believe that when multiple substance
       screening is required, simultaneous detection capability provides
       significant time and cost savings. TesTcup offers simultaneous testing
       for amphetamines, cocaine, morphine, THC and PCP. TesTcup ER is designed
       to simultaneously detect the presence of amphetamines, cocaine, morphine,
       barbiturates and benzodiazepines. The TOXI-LAB system has the ability to
       detect over 500 drugs and drug byproducts.
 
     - QUALITY. We endeavor to maintain high standards of quality in all aspects
       of our operations. All of the products developed by ANSYS incorporate
       high quality biological and chemical solutions. Our manufacturing
       facility is designed to comply with Quality System Regulations and other
       government guidelines. In addition, we employ extensive quality control
       procedures at all stages of the manufacturing process, from receipt of
       raw materials to shipping of finished products. We continuously monitor
       compliance with our quality standards in order to ensure product
       reliability.
 
     - COST-EFFECTIVENESS. TesTcup, TesTstik, ON-SITE Alcohol and the on-site
       products under development are designed to eliminate the need for highly
       trained technicians and significant outlays for laboratory equipment,
       making them cost-effective alternatives to laboratory analyzers. Unlike
       automated sample processing instruments, TOXI-LAB does not require
       significant capital expenditures.
 
     Our drug testing products and products under development include the
following:
 
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- -------------------------------------------------------------------------------
                           OUR DRUG TESTING PRODUCTS
- -------------------------------------------------------------------------------
                                                                      PRODUCT
                                                                     OWNERSHIP
     PRODUCT                DESCRIPTION/USE              STATUS      RIGHTS(1)
- -----------------  ---------------------------------  ------------  -----------
                                                           
 TesTcup 4/5       Collection and testing device for   Commercial      Roche
                   simultaneous screening of
                   multiple drugs of abuse:
                   amphetamines, cocaine, morphine,
                   THC (marijuana metabolite) and
                   PCP (TesTcup5 version only)
 
 TesTcup ER        Hospital emergency room version       Launch        Roche
                   of TesTcup configured to
                   simultaneously screen for
                   amphetamines, cocaine, morphine,
                   barbiturates and benzodiazepines
 
 TesTstik          Family of products in a dipstick
                   format that each test for a
                   single abused drug:
 
                   - Amphetamines, cocaine,            Commercial      Roche
                   morphine, THC, PCP
 
                   - Barbiturates, benzodiazepines       Launch        Roche
 
 TesTstik 2        Version of TesTstik configured to  Development      Roche
                   test for two substances (cocaine
                   and THC) simultaneously
 
 TesTstik 3        Version of TesTstik configured to  Development      Roche
                   test for three substances
                   (cocaine, THC and either
                   amphetamines or morphine)
                   simultaneously
 
 ON-SITE Alcohol   Pocket-sized device that screens    Commercial      ANSYS
                   for alcohol (ethanol) in saliva
                   or urine
 
 TOXI-LAB Drug     Bench-top system that detects       Commercial      ANSYS
   Screening       over 500 drugs and drug
   System          byproducts, with built-in quality
                   control
 
 TOXI-LAB THC II   Extension of the TOXI-LAB system    Commercial      ANSYS
   System          used to test for evidence of
                   marijuana usage
 
 TOXI-LAB LTD      Extension of the TOXI-LAB system    Commercial      ANSYS
   Opiate(TM)      used to test for evidence of
   System          opiate usage
 
 DRUGSTAT RA(TM)   Lateral flow device designed to    Development      ANSYS
                   monitor the ritalinic acid
                   metabolite of Ritalin, a
                   therapeutic drug used to treat
                   attention deficit disorder
- ---------------
(1) See "Business -- Agreements with Roche" for a description of our
    manufacturing and development agreements with Roche.
- -------------------------------------------------------------------------------

 
                                       36
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     TESTCUP 4/5. TesTcup is a self-contained, disposable urine collection and
testing device designed to detect the presence of up to five drugs of abuse
simultaneously. TesTcup provides easily interpreted results in approximately
five minutes and is designed to be simple to use. Once the urine specimen is
collected in the TesTcup, the lid is secured to the cup and the cup is tilted
forward for ten seconds, allowing urine to flow through a valve into a sample
reservoir in the cup. The cup is righted and left undisturbed for approximately
three minutes, until distinct blue lines appear on the side of the cup in the
"TEST VALID" windows indicating that results are ready. At that point, a cover
label is peeled off to reveal the test results. A white plus (+) sign indicates
the presence of a drug and a blue minus (-) sign indicates the absence of a
drug.
 
     By integrating sample collection, detection and storage features into one
device, TesTcup eliminates the need to handle samples, mix chemical solutions,
calibrate and maintain instruments, and other aspects of most drug testing
methods. We believe that TesTcup provides enhanced convenience and exceptional
testing flexibility and reliability. When test results are negative, immediate
action can be taken without the need to wait for laboratory results. In the
workplace setting, these immediate results enable employees to return to or
enter the workforce without delay. When test results are positive, the TesTcup
device acts as a shipping container to transport the specimen to the laboratory
for confirmation testing. TesTcup's innovative sealing mechanism and labeling
system ensure that all chain of custody requirements are met in the event any
disputes arise regarding the integrity of the test.
 
     TesTcup is used primarily in pre-employment screening, random employee
testing, criminal justice testing and clinical applications. For example, the
United States Postal Service is using TesTcup exclusively for its recently
implemented pilot drug screening program.
 
     TESTCUP ER. ANSYS and Roche co-developed TesTcup ER, a new version of the
TesTcup product specifically designed to meet the requirements of hospital
emergency rooms. TesTcup ER tests for five substances simultaneously, including
barbiturates and benzodiazepines, substances which are often encountered in drug
related emergency room visits. We believe that TesTcup ER will offer a number of
advantages in the emergency room setting, including ease of use, rapid, accurate
results and cost-effectiveness. Roche has begun advertising and is currently
taking orders for TesTcup ER. We intend to begin shipments of TesTcup ER to
Roche in the first quarter of 1999.
 
     TESTSTIK. TesTstik is a self-contained, easy to use, disposable dipstick
designed to detect the presence of a single drug of abuse in approximately three
minutes. We currently manufacture separate versions of TesTstik for five common
drugs of abuse, and we expect to ship to Roche new versions for detection of
barbiturates and benzodiazepines in the first quarter of 1999. The test is
conducted by submersing the sample pad in the urine specimen for five to seven
seconds, after which the slide cover is closed. Once the distinct blue line
appears indicating "TEST VALID," a plastic tab is broken off and results can be
read. A white plus (+) sign indicates the presence of a drug and a blue minus
(-) sign indicates the absence of a drug. TesTstik requires no mixing or
dispensing of chemical solutions, no pipetting of urine and no refrigeration.
TesTstik is used primarily for parole and probation testing, workplace testing
and drug treatment programs.
 
     TESTSTIK 2 AND TESTSTIK 3. ANSYS and Roche are currently developing
TesTstik 2 and TesTstik 3, new versions of the TesTstik product designed
primarily to meet the requirements of parole and probation agencies and drug
treatment programs. TesTstik 2 is
 
                                       37
   39
 
designed to test for two substances simultaneously and TesTstik 3 is designed to
test for three substances simultaneously. We believe that these products, if
successfully developed, could offer a number of advantages in parole and
probation settings, including ease of use, rapid, accurate results and
cost-effectiveness. We have produced prototypes of these products for Roche and
Roche is currently conducting marketing evaluations of the products.
 
     ON-SITE ALCOHOL. ON-SITE Alcohol is a self-contained, easy to use,
disposable, pocket-sized device designed to test for ethanol in urine or saliva.
Using a small pipette included in the test kit, a drop of reagent is transferred
from the built-in reagent well to the detection pad. A drop of the specimen is
transferred to the sample well using either the kit's pipette or its saliva
swab, and the result appears in approximately two minutes. A purple plus (+)
sign indicates the presence of ethanol while no color change indicates the
absence of ethanol. ON-SITE Alcohol is primarily used for parole and probation
testing, workplace testing and drug treatment programs. ON-SITE Alcohol
qualifies under the Department of Transportation's regulations for mandatory
random testing of transportation industry workers, including airline pilots,
truck drivers and rail employees.
 
     TOXI-LAB DRUG SCREENING SYSTEM. The TOXI-LAB drug screening system is a
unique, bench-top, thin layer chromatography system that detects over 500 drugs
and drug byproducts. TOXI-LAB uses a comprehensive, standardized set of
reference materials and offers built-in quality control, and consistent and
reproducible procedures. TOXI-LAB incorporates disposable extraction and
evaporation components which prevent cross-contamination and eliminates the
spraying of hazardous chemical solutions, thus creating a safer working
environment for the technician. TOXI-LAB is primarily used by small or mid-sized
hospitals and forensic laboratories. In emergency room applications, TOXI-LAB is
used to detect or rule out many drugs quickly in suspected poisoning cases, and
to substantiate drug overdoses or drug interactions. TOXI-LAB is used prior to
hospital admission or surgery to guard against harmful drug interactions.
TOXI-LAB is also used to monitor patient and employee compliance in substance
abuse programs, psychiatric centers, employee assistance programs and in
geriatric medicine. Law enforcement agencies, forensic laboratories and prisons
use TOXI-LAB to monitor compliance with probation and parole requirements, as
well as to analyze certain types of contraband.
 
     TOXI-LAB THC II SYSTEM. The TOXI-LAB THC II System is an extension of the
TOXI-LAB drug screening system, and is designed to be a rapid, easy to use urine
test to detect for evidence of marijuana usage. THC II is primarily used in
reference laboratories. THC II allows the laboratory to process multiple samples
simultaneously and incorporates our SPEC solid phase extraction columns, which
provide rapid and selective substance extraction and a reduction in sample
preparation time. The level of sensitivity achieved with THC II satisfies the
most stringent drug screening and confirmation requirements.
 
     TOXI-LAB LTD-OPIATE SYSTEM. The TOXI-LAB LTD-Opiate System is an extension
of the TOXI-LAB drug screening system designed to be a rapid, easy to use test
for screening or confirmation of opiates in urine. LTD-Opiate is primarily used
in reference laboratories to detect low levels of opiate alkaloids and their
byproducts. This system differentiates each of the opiates, providing a specific
analytical result without the need for sophisticated instrumentation. LTD-Opiate
also includes our SPEC solid phase extraction columns, which provide rapid and
selective substance extraction and a reduction in sample preparation time.
 
                                       38
   40
 
     DRUGSTAT RA. We are in the early stage of development of a lateral flow
immunoassay device for the detection of ritalinic acid in urine. Ritalinic acid
is a metabolite of Ritalin, which is a prescription drug used to treat attention
deficit disorder. Currently, dosage compliance by the patient is not frequently
monitored. DRUGSTAT RA would be used outside a laboratory setting to detect the
presence of ritalinic acid and would provide a noninvasive alternative to a
blood test so that patient compliance could be monitored quickly and appropriate
treatments could be prescribed immediately.
 
  SPECIALTY LABORATORY AND RESEARCH PRODUCTS
 
     Our specialty laboratory and research products include products for solid
phase extraction and for nucleic acid separation and detection. The specialty
laboratory and research products and products under development by ANSYS include
the following:
 

- ------------------------------------------------------------------------------------
                   OUR SPECIALTY LABORATORY AND RESEARCH PRODUCTS
- ------------------------------------------------------------------------------------
                                                                        PRODUCT
                                                                       OWNERSHIP
      PRODUCT                DESCRIPTION/USE            STATUS          RIGHTS
- --------------------  ------------------------------  -----------  -----------------
                                                          
 SPEC Solid Phase     Family of sample preparation    Commercial         ANSYS
   Extraction         products marketed in four
   Products           primary formats: SPEC Columns,
                      SPEC 96-Well Plates, SPEC
                      Pipette Tips and SPEC
                      Extraction Discs
 Nucleic Acid         Sample preparation products     Commercial        Promega
   Isolation          that isolate nucleic acids
   Products
 XtraAMP(TM)          Sample preparation tubes        Development      Molecular
                      incorporating DNA binding                       Innovations
                      material for rapid isolation
                      of nucleic acids
 SCIP(TM)             DNA testing cartridge that       Research        Molecular
                      integrates isolation,                           Innovations
                      amplification and detection to
                      screen for environmental
                      toxins and microorganisms
- ------------------------------------------------------------------------------------

 
     SPEC SOLID PHASE EXTRACTION PRODUCTS. Our SPEC solid phase extraction
products use proprietary membrane technology for preparing samples for trace
analysis. The SPEC products isolate substances of interest from urine, blood,
plasma or any other liquid sample. Unlike conventional solid phase extraction
products, our SPEC products use a proprietary small extraction disc, thereby
reducing solvent usage and hazardous waste generation, and reducing sample size
requirements for more efficient laboratory sample preparation. We currently
market the SPEC products in four primary formats: SPEC Columns, SPEC 96-Well
Plates, SPEC Pipette Tips and SPEC Extraction Discs. We believe that these four
formats satisfy the needs of various types of laboratories with
 
                                       39
   41
 
respect to sample size, number of samples processed and compatibility with
existing laboratory instrumentation. The primary markets for our SPEC products
are pharmaceutical companies and clinical testing laboratories performing drug
discovery and drug metabolism studies and confirmations, as well as
biotechnology companies engaged in DNA testing.
 
     NUCLEIC ACID ISOLATION PRODUCTS. We exclusively manufacture two custom
nucleic acid isolation products for Promega using our proprietary membrane
technology. These products are packaged into kits by Promega and sold through
their biological research catalog.
 
     XTRAAMP. In collaboration with Molecular Innovations, we are finalizing the
development of XtraAMP, which incorporates DNA binding material into sample
preparation tubes. The resulting XtraAMP tube is intended to be used for the
rapid extraction of DNA prior to amplification and detection. We have the
exclusive worldwide right to manufacture XtraAMP. We also have the exclusive
worldwide right to market and distribute XtraAMP to the bloodbanking market, and
the non-exclusive right to market and distribute XtraAMP in other markets.
 
     SCIP. ANSYS, in conjunction with Molecular Innovations, is conducting late
stage research of an on-site DNA testing device known as the SCIP
(Self-Contained Isothermal Particle) cartridge. This device integrates sample
preparation, DNA amplification and lateral flow detection into a single
cartridge. Incorporation of the multiple steps into an individual cartridge
simplifies the process and reduces the potential for contamination. We believe
potential applications for SCIP include testing environmental samples for viral
contamination or the presence of other microorganisms.
 
TECHNOLOGY
 
     Our technology integrates creative scientific concepts with innovative
product designs. Our research and development program applies our core
technology expertise to research projects and is currently performed in
accordance with the Quality System Regulations. We have expertise in several
core scientific disciplines, including membrane technologies, surface
chemistries and molecular interactions, all of which have enabled us to develop
innovative devices for both on-site and laboratory testing applications.
 
     MEMBRANE TECHNOLOGIES. All of our products rely upon specialized membranes.
We have significant expertise in the manufacturing and processing of both
inorganic and organic membranes. Our inorganic membranes are used as the
separation media in our TOXI-LAB system, and the SPEC solid phase extraction
membranes are an extension of the TOXI-LAB membrane technology. We also have
expertise in processing organic membranes, such as the nitrocellulose-based
membranes used in the TesTcup and TesTstik product lines.
 
     SURFACE CHEMISTRIES AND MOLECULAR INTERACTIONS. Our technical expertise
includes the chemical modification of surfaces. By changing the surface
characteristics of the membrane through chemical modifications and other
techniques, we can control interactions between the membrane and the substance
of interest. We have developed 15 surface chemistries targeted at specific
product separations. We apply our understanding of surface chemistries and
molecular interactions between the substance and the surface of the membrane to
customize membranes for specific applications.
 
                                       40
   42
 
RESEARCH AND DEVELOPMENT
 
     We principally focus our research and development efforts on responding to
market demands through the integration of creative scientific concepts with
innovative product designs. As of January 31, 1999, we had ten employees in
research and development, all of whom are dedicated to the development of new
drug testing products and specialty laboratory and research testing products, as
well as new applications for our current products. Our scientific personnel
utilize expertise in several core scientific disciplines, including membrane
technologies, surface chemistries and molecular interactions. We also have a
core competency in design engineering. The engineering staff uses computer aided
design and rapid prototype techniques for the design and development of new
diagnostic devices and manufacturing processes which incorporate biological and
chemical solutions into our products. Our engineering abilities enable us to
design products rapidly. For example, we provided Roche with working prototypes
of TesTstik 2 and TesTstik 3, each in approximately two weeks.
 
SALES AND MARKETING
 
     As of January 31, 1999, we employed 11 persons in various sales and
marketing functions, including technical support. We sell our on-site drug
testing products primarily to Roche. Roche is entirely responsible for the
marketing and distribution of TesTcup and TesTstik as well as the marketing and
distribution of ON-SITE Alcohol in specific market segments. We sell our
laboratory drug testing products direct in the United States to hospitals,
laboratories and universities, and through independent distributors
internationally. We sell our specialty laboratory and research products through
a combination of direct sales and distributors. See "Risk Factors -- We Depend
on Distributors and Have Limited Direct Sales Resources."
 
     Our Technical Support department operates a customer hotline 24 hours a
day, seven days a week in order to assist our customers in the use of our
products. Technical Support also publishes the SPEC-NEWS and TOXI-NEWS product
newsletters. These newsletters keep our customers informed of new developments
in areas of interest relevant to their industries. We also conduct numerous
TOXI-LAB customer training workshops throughout the year, and participate in
annual product trade shows and technical presentations.
 
MANUFACTURING
 
     As of January 31, 1999, we had 205 employees involved in manufacturing,
assembly, process engineering, quality control and materials management. We
believe we comply with all aspects of the Quality System Regulations in the
production of our products and we maintain strict quality control regimens in
order to ensure high standards of quality.
 
     Several of our manufacturing processes are automated. We are currently in
the process of automating additional manufacturing processes. We expect the
implementation of these manufacturing changes to allow for increased production
volumes while reducing per unit cost of goods sold. Our new automated equipment
is custom designed by manufacturers working closely with our engineering
department to ensure that our high quality standards are maintained. See "Risk
Factors -- We are Subject to Many Risks Related to Manufacturing and Our
Continuing Efforts to Increase Automation."
 
                                       41
   43
 
     We obtain all raw materials for the manufacture of our products from
outside sources. We endeavor to keep a three-month supply of critical raw
materials and component parts on hand to avoid manufacturing interruptions. See
"Risk Factors -- We Depend on Sole Source Suppliers for Raw Materials." Our
quality control department inspects and tests all raw materials, subassemblies
and finished goods against established acceptance standards.
 
COMPETITION
 
     Our target markets are intensely competitive. We believe the principal
factors for competition include accuracy, reproducibility, ease of use,
distribution capabilities and price. Our competitors include diagnostic
companies that manufacture on-site and laboratory-based drug testing products,
as well as those that manufacture specialty laboratory and research products.
Some of our competitors have substantially greater financial, technical,
research and other resources and larger, more established sales, marketing,
distribution and service organizations than we have. Moreover, a number of these
competitors offer broader product lines, have greater name recognition than we
do and offer discounts as a competitive tactic. In addition, several smaller
companies are currently making or developing products that compete with or will
compete with our products.
 
     We believe independent reference and hospital-based laboratories perform
the majority of diagnostic tests. We expect that these laboratories will compete
vigorously to maintain their position in our target markets. To achieve broad
market acceptance for our products, we, together with Roche, will be required to
demonstrate that our products are an attractive alternative to testing performed
by reference and hospital-based laboratories, which may require changes to their
established means of testing. Our products may not be able to compete with the
testing services provided by these laboratories.
 
     Our competitors may develop or market technologies or products that are
more effective or commercially attractive than our current or future products or
that would render our technologies and products obsolete. Such technologies may
limit or interfere with our ability to make, use or sell our products. In
addition, we may not have the financial resources, technical expertise or
marketing, distribution or support capabilities to compete successfully in the
future. See "Risk Factors -- Our Industry is Highly Competitive."
 
AGREEMENTS WITH ROCHE
 
     In April 1993, we entered into a commercial agreement (the "TesTcup
Agreement") with Roche. Pursuant to this agreement, Roche paid us a development
fee to develop, in collaboration with Roche, a multiple substance drugs of abuse
testing device that ultimately became TesTcup. Under the TesTcup agreement, we
assigned to Roche in perpetuity all of our ownership rights to TesTcup and to
any modifications and improvements of these products, such as TesTcup ER. In
exchange for this assignment, we were given the exclusive right to manufacture
and supply TesTcup to Roche for the term of the agreement. Roche also has the
right of first refusal to exclusively market any and all new antibody-based
drugs of abuse products developed by us. The initial TesTcup Agreement
terminates on December 31, 1999 and gives Roche an option to renew for
additional three-year periods. In May 1998, the TesTcup Agreement was amended to
extend the termination date to January 1, 2003. The TesTcup Agreement also
provides that any patentable inventions relating to TesTcup, whether developed
by us or by Roche,
 
                                       42
   44
 
or jointly, are the sole and exclusive property of Roche. Roche agreed to pay or
reimburse all reasonable costs and expenses we incur related to the filing of
patent applications concerning TesTcup. Roche also agreed to pay for all
equipment and supply all reagents and other materials necessary to manufacture
TesTcup, and owns all such equipment and reagents. Roche's proprietary reagents
are used in TesTcup. We have the right to use such equipment and reagents during
the term of the TesTcup Agreement and are required to return all such equipment
and reagents to Roche upon expiration or termination of the agreement.
 
     The TesTcup Agreement provides that we will manufacture TesTcup according
to defined specifications, subject to modification of quality control
specifications at Roche's sole discretion, and in accordance with all applicable
laws. Roche may use another vendor to manufacture TesTcup if Roche gives us
notice that the TesTcup products we are manufacturing do not meet the
specifications of the agreement, or that we are not providing sufficient
quantities of TesTcup on a timely basis, and we are unable to promptly cure the
problem or manufacture a sufficient quantity of products. We are responsible for
all costs, expenses and consequential damages under our contract with Roche for
all product recalls, returns and defects attributable to our manufacturing.
Production of TesTcup is based upon a "rolling forecast" of four three-calendar
month periods provided to us on a quarterly basis. Roche is not required to
forecast a minimum number of units, provided that the number of units for the
initial three-calendar month period of any rolling forecast may not vary in
excess of 20%. The agreement provides maximum order limitations, subject to the
our maximum production capacity. Orders for TesTcup are based upon written
purchase orders delivered by Roche. The unit price of TesTcup is to be
determined by a formula derived in part from our cost of production.
 
     The TesTcup Agreement provides that Roche will offer to license TesTcup to
us in those markets or market segments in which Roche has determined that it
will not sell the product. In such event, we have no right to sublicense, assign
or transfer our rights under any such license without the prior written approval
of Roche. If we do not accept such an offer within the time period allotted
under the TesTcup Agreement, then Roche may offer such license to third parties
without any further obligation to us. The TesTcup Agreement also gives Roche a
right of first refusal to exclusively market any and all new antibody-based
drugs of abuse products we develop. The TesTcup Agreement also provides that we
and Roche each indemnify the other against damages resulting from our respective
performances under the agreement and certain other matters.
 
     The TesTcup Agreement allows either party to terminate the agreement upon
certain breaches by the other party, or the bankruptcy or insolvency of the
other party, and allows Roche to terminate the agreement upon the occurrence of
certain FDA actions or objections. In the event that Roche does not renew its
agreement with us at the end of its term for reasons other than as a result of a
breach by us, Roche will pay us a fee to be negotiated by the parties, not to
exceed 3% of the net sales price of TesTcup, for each unit sold by Roche
following such termination. Neither Roche nor ANSYS may assign its rights under
the TesTcup Agreement to a third party without the prior written consent of the
other.
 
                                       43
   45
 
     In September 1996, we entered into a development and manufacturing
agreement with Roche (the "TesTstik Agreement") pursuant to which Roche paid us
a development fee to develop, in collaboration with Roche, a single substance
drug of abuse testing device that ultimately became TesTstik. The TesTstik
Agreement terminates in October 2002, and gives Roche an option to extend the
agreement for additional three-year terms, or portions thereof. The TesTstik
Agreement contains material terms substantially identical to the TesTcup
Agreement, including:
 
     - terms relating to Roche's ownership of all rights to TesTstik, including
       rights to related patents, and the equipment and reagents used to
       manufacture TesTstik;
 
     - payment by Roche of patent related fees and expenses;
 
     - our exclusive manufacturing and supply rights;
 
     - forecasting, ordering and licensing provisions;
 
     - specifications; and
 
     - quality control.
 
     The TesTstik Agreement also contains certain terms which differ from those
of the TesTcup Agreement, including:
 
     - Roche will receive product discounts based upon volume of purchases and
       levels of automation;
 
     - Roche does not have to pay us any fee in respect of Roche's net sales of
       TesTstik if Roche does not renew its agreement with us after the end of
       its term;
 
     - Roche has a right of first refusal to exclusively market any and all new
       products we develop using Roche's reagent technology during the term of
       the agreement;
 
     - Our financial liability is limited for certain breaches of the TesTstik
       Agreement to the price Roche pays us for the TesTstik products;
 
     - Roche and ANSYS each have equitable remedies in the event of a breach by
       the other;
 
     - We must pay Roche a license fee not to exceed ten percent (10%) of our
       net sales in markets where Roche licenses TesTstik to us for sale because
       Roche has decided not to sell TesTstik in that market;
 
     - Roche or ANSYS has the right to assign their rights to an affiliate or a
       successor in interest to substantially all of the assigning party's
       assets without obtaining the other party's consent, provided that all
       other assignments require the prior written consent of the non-assigning
       party; and
 
     - Pricing disputes following a modification by Roche of TesTstik
       specifications shall be submitted to binding arbitration.
 
RELATIONSHIP WITH MOLECULAR INNOVATIONS
 
     We have been collaborating with the scientific staff at Molecular
Innovations since 1995 to develop new products such as SCIP and XtraAMP. Under
existing agreements with Molecular Innovations, we have the exclusive right to
manufacture and the non-
 
                                       44
   46
 
exclusive right to market and distribute SCIP until February 2002. We have the
exclusive right to manufacture XtraAMP, the exclusive right to market and
distribute XtraAMP in the bloodbanking markets, and the non-exclusive right to
market and distribute XtraAMP in all other markets, for five years from the
launch of XtraAMP. Under our agreements, Molecular Innovations holds all
intellectual property and other ownership rights to SCIP and XtraAMP. We have
purchased less than a 5% equity interest in, and have provided convertible debt
financing to, Molecular Innovations. In addition, we have the right to designate
a representative to the Molecular Innovations board of directors.
 
INTELLECTUAL PROPERTY
 
     Our ability to compete effectively will depend in part upon our ability to
develop and maintain the proprietary aspects of our technology and to operate
without infringing the proprietary rights of others. We hold two United States
patents which expire in 2009 relating to our ON-SITE Alcohol product and are
currently pursuing two pending patent applications. We cannot be certain that
our pending patent applications will result in the issuance of any patents. Even
if any patents are issued, they may not adequately protect our intellectual
property rights against competitors with similar technology. In addition, any
existing or future patents could be challenged, invalidated or circumvented, and
any right granted under the patents may not provide meaningful protection to us.
The failure of any patents to protect our technology would make it easier for
our competitors to offer similar products.
 
     These products also incorporate reagent technologies owned by Roche. Roche
holds all of the intellectual property and other ownership rights of two of the
largest volume products we sell, TesTcup and TesTstik. Pursuant to development
and manufacturing agreements with Roche, we have the exclusive manufacturing
rights to the TesTstik product line until October 2002 and to TesTcup until
January 2003. If during the term of these agreements, or any renewals of these
agreements, an invention is made relating to TesTcup or TesTstik that results in
additional patentable rights to these products, all of those patentable rights
will belong to Roche. Roche may not aggressively protect its patents or licenses
on the products we manufacture. Roche's failure to protect its rights could
adversely affect our business.
 
     We rely principally upon trade secrets, technical know-how and continuing
innovation to develop and maintain our competitive position, particularly with
respect to our membrane technologies. We generally enter into confidentiality
agreements with our employees and strategic partners, and attempt to control
access to and distribution of our confidential documentation and other
proprietary information. Notwithstanding these precautions, it may be possible
for a third party to copy or otherwise obtain and use our products, services or
technology without authorization, develop similar technology independently or
design around our and Roche's intellectual property. Accordingly, we may not be
able to protect our proprietary technology adequately, and our failure or
inability to do so could adversely affect our business. In addition, effective
copyright, trademark and trade secret protection may be unavailable or limited
in certain foreign countries. Moreover, litigation may be necessary in the
future to enforce either our or our strategic partners' intellectual property
rights, to protect their respective trade secrets or to determine the validity
and scope of proprietary rights of others, including its customers. Irrespective
of the validity or success of litigation, we would likely incur significant
costs and that litigation could divert management's efforts and other resources.
In addition, the litigation could result in the issuance of an injunction
against us, requiring us or our strategic partners to withdraw certain products
from the market, redesign certain products currently offered for sale or under
development, or require them to obtain licenses, which
 
                                       45
   47
 
may not be available on reasonable terms, or at all. Any of the foregoing could
adversely affect our business. See "Risk Factors -- We May Not Be Able to
Adequately Protect or Enforce Our Intellectual Property Rights."
 
GOVERNMENT REGULATION
 
     FDA MARKET CLEARANCE AND APPROVAL. The testing, manufacture and sale of our
products are subject to regulation by numerous governmental authorities,
principally the FDA and corresponding state and foreign regulatory agencies.
Under the Federal Food, Drug, and Cosmetic Act and its regulations, the FDA
regulates the preclinical and clinical testing, manufacture, labeling,
distribution and promotion of medical devices. We may not commence clinical
testing, marketing, or commercial sales in the United States of new products
under development until they receive clearance or approval from the FDA. This
can be a lengthy, expensive and uncertain process. Noncompliance with applicable
requirements can result in, among other things: (1) warning letters; (2) fines;
(3) injunctions; (4) civil penalties; (5) recall or seizure of products; (6)
total or partial suspension of production; (7) failure of the government to
grant premarket clearance or premarket approval for devices; (8) withdrawal of
marketing clearances or approvals; and (9) criminal prosecution. The FDA also
has the authority to request recall, repair, replacement or refund of the cost
of any device manufactured or distributed by us.
 
     In the United States, medical devices are classified into one of three
classes (i.e., Class I, II or III) on the basis of the controls deemed necessary
by the FDA to reasonably ensure their safety and effectiveness. Class I devices
are subject to certain general controls, such as labeling and adherence to the
Quality Systems Regulation. Most Class I devices are exempt from market
clearance requirements, but some Class I devices still require a stock premarket
notification. Class II devices are subject to general controls (including
premarket notification for non-exempt Class II devices) and special controls
(e.g., performance standards, postmarket surveillance, patient registries and
FDA guidelines). Generally, Class III devices are those which must receive
premarket approval by the FDA to ensure their safety and effectiveness. Class
III devices include, for example: (1) life-sustaining, life-supporting and
implantable devices; (2) devices that present a potentially high risk of
illness; or (3) new devices which have been found not to be substantially
equivalent to legally marketed devices.
 
     Unless a device is exempt from premarket notification the manufacturer must
generally obtain FDA clearance or approval through either clearance of a 510(k)
notification or approval of a premarket approval application before the device
can be introduced in the market. A premarket approval application must be filed
if a proposed device is a new device not substantially equivalent to a legally
marketed device, is a classified Class III device or is a preamendment Class III
device for which the FDA has called for premarket approvals. A premarket
approval application must be supported by valid scientific evidence to
demonstrate the safety and effectiveness of the device. This evidence typically
includes the results of clinical investigations, bench tests, laboratory and
animal studies. The premarket approval application must also contain a complete
description of the device and its components and a detailed description of the
methods, facilities and controls used to manufacture the device. In addition,
the submission must include the proposed labeling, advertising literature and,
often, training materials. The pre-market approval process can be expensive,
uncertain and lengthy. A number of devices for which FDA approval has been
sought by other companies have never been approved for marketing.
 
                                       46
   48
 
     Upon receipt of a premarket approval application, the FDA makes a threshold
determination as to whether the application is sufficiently complete to permit a
substantive review. If the FDA determines that the premarket approval
application is complete, the FDA will accept the application for filing. Once
the submission is accepted, the FDA begins an in-depth review of the premarket
approval application. The FDA review generally takes one to three years from the
date the application is accepted, but may take significantly longer. The review
time is often significantly extended because the FDA requests more information
or clarification of information already provided in the submission. During the
review period, an advisory committee, typically a panel of experts, usually is
convened to review and evaluate the application. The advisory panel provides
recommendations to the FDA as to whether the device should be approved. The FDA
is not bound by the recommendation of the advisory panel, but the agency usually
follows the panel's recommendations. Toward the end of the premarket approval
review process, the FDA generally will conduct an inspection of the
manufacturer's facilities and manufacturing processes and controls to ensure
that they are in compliance with applicable requirements under the Quality
System Regulation and that they are in conformance with those described in the
premarket approval application. If FDA evaluations of both the pre-market
approval application and the manufacturing facilities and practices are
favorable, the FDA may issue either an approval letter or an approvable letter.
An approvable letter usually contains a number of conditions that must be met in
order to secure final approval of the application. When and if those conditions
have been fulfilled to the satisfaction of the FDA, the agency will issue an
approval letter, authorizing commercial marketing of the device for certain
indications. The approval letter also contains requirements that the company
must continue to meet as conditions of approval. If the FDA's evaluation of the
premarket approval application or manufacturing facilities is not favorable, the
FDA will deny approval of the application or issue a non-approvable letter.
 
     Among other things, the FDA may determine that additional clinical
investigations are necessary, in which case the approval may be delayed for one
or more years while additional clinical investigations are conducted and
submitted in an amendment to the pre-market approval application. Modifications
to a device that is the subject of an approved premarket approval application,
or to that device's labeling or manufacturing processes, may require approval by
the FDA of application supplements or new applications. Supplements to an
approved application often require the submission of the same or similar types
of information required for an initial premarket approval application, except
that the supplement is generally limited to that information needed to support
the proposed change from the product covered by the original application.
 
     A 510(k) clearance will be granted if the submitted information establishes
that the proposed device is "substantially equivalent" to a legally marketed
Class I or Class II medical device or a preamendments Class III medical device
for which the FDA has not called for premarket approval. The FDA recently has
been requiring more rigorous demonstration of substantial equivalence than in
the past, including in some cases requiring submission of clinical data. It
generally takes from three to 12 months from submission to obtain 510(k)
premarket clearance, but it may take longer. The FDA may determine that a
proposed device is not substantially equivalent to a legally marketed device or
that additional information is needed before a substantial equivalence
determination can be made. A "not substantially equivalent" determination, or a
request for additional information, could prevent or delay the market
introduction of new products that fall into this category. For any devices that
are cleared through the 510(k) process, modifications or enhancements that (1)
could significantly affect safety or effectiveness, or (2) constitute a major
change in the intended use of the device will require new 510(k) submissions.
 
                                       47
   49
 
     We are uncertain of the regulatory path to market that the FDA will
ultimately apply to our products currently in development. TOXI-LAB, SPEC and
ON-SITE Alcohol received 510(k) clearance. TesTcup and TesTstik received 510(k)
clearance through Roche. We cannot be certain, however that the FDA will not
require us to adhere to the more costly, lengthy and uncertain premarket
approval process for any of our products in development.
 
     We may not be able to obtain necessary regulatory approvals or clearances
for our products on a timely basis, if at all. Our business could be materially
and adversely affected by, for example: (1) delays in receipt of or failure to
receive such approvals or clearances; (2) the loss of previously received
approvals or clearances; (3) limitations on intended use imposed as a condition
of such approvals or clearances; or (4) failure to comply with existing or
future regulatory requirements.
 
     CLINICAL STUDIES. The FDA requires manufacturers to submit the results of
clinical studies of medical devices in humans for most premarket approval
applications and many 510(k) premarket notifications. Many of our products are
in vitro diagnostic products and, for in vitro diagnostic products, the FDA
usually requires testing using specimens taken from humans. This testing may be
classified as a clinical study.
 
     A clinical study in support of a 510(k) premarket notification or a
premarket approval application must follow the FDA's Investigational Device
Exemption regulation unless the study is exempted from the requirements of the
regulation. This regulation provides that, if the study is classified as a
"significant risk" investigation, the FDA must approve an Investigational Device
Exemption application before the study can begin. Significant risk studies are:
(1) those that study devices which present a potential for serious risk to the
health, safety, or welfare of a patient; (2) studies in which the device is used
to support or sustain life; or (3) studies in which the device is of substantial
importance in diagnosing or treating disease or preventing impairment of human
health. If an Investigational Device Exemption application is required, it must
be supported by appropriate data, such as animal testing data and laboratory
testing results.
 
     A significant risk clinical study may begin if the FDA approves an
Investigational Device Exemption application and an appropriate Institutional
Review Board approves the study at each clinical site. An Institutional Review
Board is a committee composed of medical professionals and members of the
community. It is charged with protecting the welfare of human subjects.
 
     If the study is not a significant risk study, the study may begin after the
Institutional Review Board has approved it, without the need for FDA approval.
However, the study still must be conducted under the FDA's Investigational
Device Exemption rules. The rules include recordkeeping and reporting
requirements for the clinical investigator and the company sponsoring the study.
The rules also include a requirement to obtain the informed consent of study
subjects and other requirements designed to protect the integrity of the data
and the health and welfare of patients.
 
     The Investigational Device Exemption regulations prohibit the commercial
sale of investigational devices. The investigational devices may be delivered
only to qualified clinical investigators. However, during a clinical study, a
company is permitted to sell the products used in the study to the investigators
for an amount that does not exceed the costs of research, development,
manufacture and handling.
 
     Clinical investigations of in vitro diagnostic products are exempt from the
FDA's Investigational Device Exemption regulations, including the need to obtain
the FDA's prior
 
                                       48
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approval and the regulation's provisions against commercialization, provided the
testing meets the following criteria:
 
     - the testing is non-invasive;
 
     - the specimen is collected without the need for an invasive procedure that
       would present a significant risk;
 
     - the testing does not introduce energy into the subject; and
 
     - if the test product is used as a diagnostic device, there is confirmation
       of any diagnosis by another medically established procedure.
 
Products that meet this exemption from the Investigational Device Exemption
regulations may be either in the laboratory phase of development, i.e., they are
not used on humans, or they may be for the testing of specimens taken from
humans prior to full commercial marketing. Products in the laboratory stage of
testing must be labeled, "For research use only. Not for use in diagnostic
procedures," when they are shipped. Products for human use must be labeled, "For
investigational use only. The performance characteristics of this product have
not been established." The FDA has developed detailed guidelines about how to
comply with the "Research Use Only" and "Investigational Use Only" requirements.
The guidelines include requirements for distribution controls and certifications
from customers to assure that tests distributed for research or clinical
investigation are used only for those purposes.
 
     We and/or our strategic partners intend to conduct clinical investigations
of products under development that will include distribution of the products as
"Investigational Use Only" under the exemption described above. There can be no
assurance that the FDA would agree that our "Investigational Use Only"
distribution of our in vitro diagnostic products under development will meet the
requirements of the exemption. The FDA recently has issued new guidelines in
this area. These guidelines describe, among other things, the FDA's intent to
exercise heightened enforcement with respect to "Investigational Use Only" and
"Research Use Only" in vitro diagnostic devices that the FDA believes are
improperly commercialized prior to receipt of FDA clearance or approval. There
can be no assurance that the FDA will believe we meet the new guidelines.
Failure by us or the recipients of our products under development to maintain
compliance with the requirements for the exemption could result in enforcement
action by the FDA. This could include, among other things, the possibility that
the FDA could require us to comply with the full Investigational Device
Exemption regulations or that the FDA could impose other restrictions on our
distribution of our products under development. This would adversely affect our
ability to conduct the clinical investigations necessary to support market
clearance or approval and could increase the costs of product development
substantially.
 
     A failure to adhere to regulatory requirements generally applicable to
clinical studies or to any conditions of a required Investigational Device
Exemption approval could result in a material adverse effect on us, including
the possible refusal of the FDA to grant market clearance or approval for our
products. We cannot be certain that any clinical study we propose will meet the
FDA's guidelines or be approved by the FDA, if FDA approval is necessary. There
can be no assurance that any clinical study we propose will be completed or, if
completed, will provide data and information that will support premarket
approval or 510(k) notification clearance.
 
     QUALITY SYSTEM REGULATION AND MEDICAL DEVICE REPORTING (MDR). Any devices
we manufacture or distribute pursuant to FDA clearance or approvals are subject
to pervasive and continuing regulation by FDA and certain state agencies.
Manufacturers of medical
 
                                       49
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devices for marketing in the United States are required to adhere to applicable
regulations setting forth detailed Quality Systems Regulations. These
regulations include detailed requirements for testing, quality control, product
labeling, process and procedure documentation, and design controls.
 
     We also must comply with the FDA's Medical Device Reporting requirements
for our commercially sold products. The Medical Device Reporting regulations
require us to report to the FDA any information we receive that reasonably
suggests one of our medical device products may have caused or contributed to a
death or serious injury. We also must report to the FDA any information that
reasonably suggests one of our medical device products malfunctioned if the
malfunction would be likely to cause or contribute to a death or serious injury
if it were to recur. Medical Device Reporting information sent to the FDA is
used by the agency to make regulatory and investigational decisions. It also is
available to the public under the Freedom of Information Act.
 
     We are subject to routine inspection by the FDA and certain state agencies
for compliance with Quality Systems Regulations requirements, MDR requirements
and other applicable regulations. We may incur significant costs to comply with
laws and regulations in the future. Changes in existing laws and regulations or
adoption of new laws and regulations could adversely affect our business.
 
     THE CLINICAL LABORATORY IMPROVEMENT AMENDMENTS OF 1988 AND RELATED
REGULATIONS. The use of our products is also affected by the Clinical Laboratory
Improvement Amendments of 1988 (CLIA) and related federal and state regulations
which provide for regulation of laboratory testing. The scope of these
regulations includes quality control, proficiency testing, personnel standards
and federal inspections. CLIA categorizes tests as "waived," "moderately
complex" or "highly complex" on the basis of specific criteria. Any future
amendment of CLIA or the promulgation of additional regulations impacting
laboratory testing may adversely affect our business.
 
     OTHER REGULATIONS. We also are subject to numerous other federal, state and
local laws relating to matters such as: (1) safe working conditions; (2)
manufacturing practices; (3) environmental protection; (4) fire hazard control;
and (5) disposal of hazardous or potentially hazardous substances. We may incur
significant costs to comply with these laws and regulations in the future.
 
EMPLOYEES
 
     As of January 31, 1999, we had 241 full-time employees, including ten
employees engaged in research and development, 11 engaged in sales and
marketing, 205 engaged in manufacturing operations and 15 engaged in general and
administrative activities. Our employees are not represented by any collective
bargaining agreement, and we have never experienced a work stoppage. We believe
our employee relations are good.
 
FACILITIES
 
     Our administrative, engineering and manufacturing facilities are located in
an 84,000 square foot facility in Lake Forest, California. We believe our
existing facility will be sufficient for our needs for the foreseeable future.
We have a fixed-price option to purchase this facility in February 2000 for $5.6
million.
 
LEGAL PROCEEDINGS
 
     We are not involved in any material litigation and are not aware of any
claims which would give rise to material liability.
 
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                                   MANAGEMENT
 
EXECUTIVE OFFICERS AND DIRECTORS
 
     The following table provides certain information with respect to our
executive officers and directors as of January 31, 1999:
 


             NAME                AGE                  POSITION
- -------------------------------  ---   ---------------------------------------
                                 
Stephen K. Schultheis..........  53    Chairman of the Board, President and
                                       Chief Executive Officer
Steven P. Sidwell..............  58    Executive Vice President -- Operations
Dennis D. Blevins, Ph.D. ......  45    Vice President -- Research and
                                       Development
Suzanne M. David...............  32    Chief Financial Officer and Secretary
Darrell J. Adams...............  50    Vice President -- Technical Support
Wilford C. Downs...............  47    Vice President of Operations --
                                         Laboratory Products
Jeffrey G. Uding...............  44    Director of Operations -- On-Site
                                       Products
Ronald J. Hall(1)(2)...........  58    Director
George D. Holmes(1)(2).........  67    Director
John M. Morris(2)..............  50    Director
C. Michael O'Donnell, Ph.D.....  59    Director
William C. Shepherd............  60    Director

 
- -------------------------
(1) Member of the Audit Committee.
(2) Member of the Compensation Committee.
 
     STEPHEN K. SCHULTHEIS has served as our President and Chief Executive
Officer since 1995, and Chairman of the Board since April 1998. Mr. Schultheis
joined ANSYS in 1990 as Director of Research and Development. He was promoted to
Vice President -- Research and Development in 1992 and promoted to Chief
Operating Officer in 1994. From 1986 to 1990, Mr. Schultheis was a professional
Consulting Engineer designing and developing products for various medical
diagnostic and commercial companies. From 1979 to 1986, he was Vice
President -- Engineering and Operations for Orangematic, Inc., a manufacturer of
food processing equipment. From 1974 to 1979, Mr. Schultheis was Vice
President -- Research and Development of Bennett Industries, a manufacturer of
commercial plastic products. From 1968 to 1973, he was a research engineer with
the United States Naval Undersea Center, engaged in weapons development. Mr.
Schultheis currently serves on the Board of Directors of Molecular Innovations,
Inc. Mr. Schultheis received a B.S. from California State University at San Jose
in 1968, and a M.S. in Mechanical Engineering from the University of Southern
California in 1972.
 
     STEVEN P. SIDWELL has served as our Executive Vice President -- Operations
since 1998. From 1990 to 1998, Mr. Sidwell held a variety of positions with
Sensormedics Corporation, which is engaged in pulmonary function, exercise,
nutrition and metabolic function diagnosis, most recently as its Executive Vice
President of Operations. Prior to joining Sensormedics, Mr. Sidwell served as
President of National Service Concepts, a consumer electronics production
company, from 1988 to 1989. Mr. Sidwell received a B.S. in Chemical Engineering
from Purdue University in 1964 and a M.B.A. from the University of Pennsylvania
in 1968. Mr. Sidwell also serves on the board of directors of IOMED, Inc., a
publicly traded drug delivery company.
 
                                       51
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     DENNIS D. BLEVINS, PH.D. has served as our Vice President -- Research and
Development since 1997. Dr. Blevins joined ANSYS in 1992, and served as Senior
Scientist from 1992 to 1994. From 1994 to 1996, Dr. Blevins served as SPEC
Division Manager. From 1996 to 1997 he served as Director of Research and
Development. From 1990 to 1992, Dr. Blevins was employed by S-CUBED, the
environmental laboratory division of Maxwell Laboratories. Prior to 1990, Dr.
Blevins held a number of research and development positions for laboratory
products and pharmaceutical companies. Dr. Blevins received a Ph.D. in
Analytical Chemistry in 1982 from the University of Arizona.
 
     SUZANNE M. DAVID has served as our Chief Financial Officer and Secretary
since July 1998. Ms. David joined ANSYS in March 1996 as Controller. From 1991
to 1996, Ms. David served as the Accounting Manager for Corona Clipper, a
manufacturer of garden products where she was responsible for the preparation of
all financial reporting documents. Prior to 1991, Ms. David held a number of
finance positions with various manufacturing companies. Ms. David received a
B.A. in Business Administration from California State University Fullerton in
1992.
 
     DARRELL J. ADAMS has served as our Vice President -- Technical Support
since 1988. Mr. Adams joined ANSYS in 1976 as a Technical Representative. From
1977 to 1981, Mr. Adams worked as Chief Technologist and Supervisor and
developed ANSYS' reanalysis and technical consultation services. From 1981 to
1988 Mr. Adams worked as Director of Technical Support. Mr. Adams received a
B.S. in Microbiology from Idaho State University in 1973.
 
     WILFORD C. DOWNS has served as our Vice President of
Operations -- Laboratory Products since 1988. From 1981 to 1988, Mr. Downs was
Manufacturing and Distribution Manager for Marion Laboratories, Inc., a
pharmaceutical company. From 1974 to 1981, Mr. Downs served as Production
Manager for Analytical Systems, Inc., a manufacturer of diagnostic products. Mr.
Downs received a B.S. in Business Administration from the University of La
Verne, California in 1987.
 
     JEFFREY G. UDING has served as our Director of Operations -- On-Site
Products since July 1997. Mr. Uding joined ANSYS in March 1996 as Manager of
On-Site Products. Prior to joining ANSYS, Mr. Uding held management positions
for Pacesetter Systems, a division of St. Jude Medical, and was Group Manager at
Mallinckrodt Medical (formerly Sorin Biomedical). Prior to that, Mr. Uding was
employed at Baxter Healthcare for approximately 12 years, holding positions in
manufacturing and research and development for medical, respiratory, parenterals
and kidney dialysis products. Mr. Uding received a B.S. from Roosevelt
University in Chicago in 1983. He received a M.S. in Management from University
of LaVerne, California in 1988 and a M.B.A. from Pepperdine University in 1991.
 
     RONALD J. HALL has served as a director of ANSYS since 1991. Since 1990,
Mr. Hall has also been the Managing General Partner of Hall Capital Management,
the General Partner of Hall, Morris & Drufva II, L.P., an institutional venture
capital fund. From 1986 to 1990, Mr. Hall was Senior Vice President of First
Interstate Venture Capital Corporation, the venture capital subsidiary of First
Interstate Bank. From 1973 to 1983, Mr. Hall was also a General Partner of
Weiss, Peck & Greer, a New York and San Francisco-based venture capital and
money management firm. Mr. Hall is a director of Encad, Inc., a publicly-traded
manufacturer of wide format color ink-jet printers. He is also a director of six
privately held companies which are part of the Hall, Morris & Drufva II, L.P.
portfolio.
 
                                       52
   54
 
     GEORGE D. HOLMES has served as a director of ANSYS since 1988. Mr. Holmes
is a retired medical industry executive with 22 years of medical systems
management experience. From 1987 to 1996, Mr. Holmes was Chief Executive Officer
of Sensormedics. From 1984 to 1985, Mr. Holmes was Executive Vice President of
ADAC Laboratories, a manufacturer in nuclear medicine diagnostic systems. From
1980 to 1984, Mr. Holmes served as the President of Squibb Vitatek, Inc., a
manufacturer of portable patient monitoring systems. Mr. Holmes also served as
the Chairman of the St. Joseph Hospital Foundation and a director of the Oregon
State March of Dimes. He was also Chairman of the Advisory Board of the
University of Southern California School of Medicine, Department of Physical
Therapy and Biokinesiology. He is currently a director of the American Pulmonary
Medicine Institute.
 
     JOHN M. MORRIS has served as a director of ANSYS since 1988. Mr. Morris has
been a Managing Director in the Corporate Finance Department of Sutro & Co.
Incorporated since 1996. From 1995 to 1996, Mr. Morris was a Managing Director
in the Investment Banking Department of Wedbush Morgan Securities. From 1992 to
1995, Mr. Morris was a Principal at NewCap Partners, a private investment bank.
From 1988 to 1992, he was a partner in Hall, Morris and Drufva Capital
Management, the successor to First Interstate Venture Capital Corporation. From
1984 to 1988, Mr. Morris served in various investment banking capacities with
PaineWebber, Inc. and with Wedbush Morgan Securities. Mr. Morris is a founding
director of the Forum of Corporate Directors in Orange County and served as its
President in 1994.
 
     C. MICHAEL O'DONNELL, PH.D. has served as a director of ANSYS since 1988.
Since 1996, Dr. O'Donnell has been President and Chief Executive Officer of EMS,
Inc., a manufacturer of electronic monitoring devices for parole and probation.
Prior to joining EMS, Dr. O'Donnell served in various capacities with ANSYS,
most recently as our Chairman of the Board, from 1994 to 1998. Prior to that he
served as President and Chief Executive Officer from 1988 to 1994, and served as
our Operations Manager from 1984 to 1988. During 1984, Dr. O'Donnell was a
private consultant. From 1982 to 1984, Dr. O'Donnell was President and Chief
Executive Officer of Clinetics Corporation, a manufacturer of immunodiagnostic
reagents.
 
     WILLIAM C. SHEPHERD became a director of ANSYS in 1999. Mr. Shepherd was
previously Chairman of the Board of Allergan, Inc., a leading provider of eye
care and specialty pharmaceutical products throughout the world, from January 1,
1996 to January 1, 1998, and currently serves on Allergan's board of directors.
He was President and Chief Executive Officer of Allergan from 1992 to 1996, and
prior to that, served as the President and Chief Operating Officer of Allergan
from 1984 to 1991.
 
     There are no family relationships among any of our directors or executive
officers. All directors hold office until the next annual meeting of the
stockholders and until their successors have been elected and qualified or until
their earlier resignation or removal. Executive officers are appointed to serve
at the discretion of the Board of Directors.
 
COMMITTEES OF THE BOARD
 
     The Board of Directors has established two standing committees: the Audit
Committee and the Compensation Committee. The Audit Committee consists of Ronald
J. Hall and George D. Holmes. The Audit Committee recommends the appointment of
independent public accountants for the annual audit of our financial statements
to the Board of Directors. The Audit Committee reviews the scope of the annual
audit and other
 
                                       53
   55
 
services the auditors are asked to perform. This committee also reviews the
report on our financial statements prepared by the auditors following the audit,
and our accounting and financial policies in general. The Audit Committee also
reviews management's procedures and policies with respect to our internal
accounting controls.
 
     The Compensation Committee consists of Ronald J. Hall, George D. Holmes and
John M. Morris. The Compensation Committee reviews and approves salaries,
benefits and bonuses for all executive officers. It reviews and recommends to
the Board of Directors on matters relating to employee compensation and benefit
plans. The Compensation Committee also administers our 1990 Stock Option Plan
and the 1997 Stock Incentive Plan.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
     No interlocking relationship exists between the Board of Directors or
Compensation Committee and the board of directors of any other company.
 
DIRECTOR COMPENSATION
 
     We currently pay our nonemployee directors $1,000 per board meeting
attended and reimburse out-of-pocket expenses incurred by our directors in
connection with attendance of board and committee meetings.
 
EMPLOYMENT CONTRACTS AND TERMINATION OF EMPLOYMENT AND CHANGE OF CONTROL
ARRANGEMENTS
 
     We do not currently have any employment contracts with any of our executive
officers. Accordingly, the Board of Directors may terminate the employment of
any executive officer at any time in its discretion. We provide incentives such
as salary, benefits and option grants (which are typically subject to a three to
five year vesting schedule) to attract and retain executive officers and other
key employees. The Compensation Committee has the authority to provide for an
accelerated vesting of any outstanding options if an individual's employment is
terminated following an acquisition or certain hostile changes in control of
ANSYS.
 
                                       54
   56
 
EXECUTIVE COMPENSATION
 
     SUMMARY COMPENSATION INFORMATION. The following table summarizes the
compensation earned by, and paid to, our Chief Executive Officer and our four
most highly compensated executive officers, other than the Chief Executive
Officer, who received compensation in excess of $100,000 for the year ended
December 31, 1998 (the "Named Executive Officers").
 
                           SUMMARY COMPENSATION TABLE
 


                                                                                 LONG-TERM
                                                                            COMPENSATION AWARDS
                                            ANNUAL COMPENSATION            ---------------------
                                   -------------------------------------         SHARES OF
                                                          OTHER ANNUAL         COMMON STOCK
   NAME AND PRINCIPAL POSITION     SALARY(1)    BONUS    COMPENSATION(2)   UNDERLYING OPTIONS(#)
- ---------------------------------  ---------   -------   ---------------   ---------------------
                                                               
Stephen K. Schultheis............  $180,909    $51,923       $4,609               60,000
  Chairman, President and Chief
     Executive Officer
Dennis D. Blevins, Ph.D..........    92,259     21,037        2,580                   --
  Vice President -- Research and
     Development
Darrell J. Adams.................    92,683     21,218        3,449                   --
  Vice President -- Technical
     Support
Wilford C. Downs.................    88,470     20,254          840                   --
  Vice President of Operations --
     Laboratory Products
Jeffrey G. Uding.................    89,690     19,846        2,714                   --
  Director of
     Operations -- On-Site
     Products

 
- -------------------------
(1) We provide our officers with certain non-cash group life and health benefits
    generally available to all salaried employees. These benefits are not
    included in the above table pursuant to applicable Securities and Exchange
    Commission rules. No Named Executive Officer received aggregate personal
    benefits or perquisites that exceed the lesser of $50,000 or 10% of his
    total annual salary and bonus.
(2) Represents our matching contribution under our 401(k) Plan to the respective
    accounts of the Named Executive Officers.
 
                                       55
   57
 
     STOCK OPTION GRANTS. The following table sets forth certain information
regarding options granted to the Named Executive Officers during 1998. We have
not granted any stock appreciation rights.


                                                   INDIVIDUAL GRANTS
                            ----------------------------------------------------------------
                              NUMBER OF      % OF TOTAL
                             SECURITIES       OPTIONS                   MARKET
                             UNDERLYING      GRANTED TO    EXERCISE    PRICE ON
                               OPTIONS      EMPLOYEES IN   PRICE PER   DATE OF    EXPIRATION
           NAME             GRANTED(#)(2)     1998(3)        SHARE      GRANT        DATE
- --------------------------  -------------   ------------   ---------   --------   ----------
                                                                   
Stephen K. Schultheis.....     60,000           34.2%        $3.83      $4.74      04/08/08
Dennis D. Blevins,
  Ph.D. ..................         --             --            --         --            --
Darrell J. Adams..........         --             --            --         --            --
Wilford C. Downs..........         --             --            --         --            --
Jeffrey G. Uding..........         --             --            --         --            --
 

 
                            POTENTIAL REALIZABLE VALUE AT ASSUMED
                                 ANNUAL RATES OF STOCK PRICE
                              APPRECIATION FOR OPTION TERM($)(1)
                            --------------------------------------
           NAME                 0%           5%            10%
- --------------------------  ----------   -----------   -----------
                                              
Stephen K. Schultheis.....   $54,600      $233,458      $507,860
Dennis D. Blevins,
  Ph.D. ..................        --            --            --
Darrell J. Adams..........        --            --            --
Wilford C. Downs..........        --            --            --
Jeffrey G. Uding..........        --            --            --

 
- -------------------------
(1) The potential realizable value is calculated by assuming that (a) the stock
    option price on the date of grant appreciates at the indicated annual rate
    compounded annually for the entire ten year term of the options, and (b) the
    option is exercised and the underlying common stock sold on the last day of
    its term for the appreciated stock price. The potential realizable value of
    each option at 0% is based on the fair market value of the common stock on
    the date of grant, $4.74 per share, minus the exercise price times the
    number of shares underlying the option. The potential realizable value of
    each option at 5% and 10% are based on the term of the option at its time of
    grant (ten years). Each is calculated by assuming that the stock price on
    the date of the grant appreciates at 5% or 10%, as applicable, compounded
    annually for the entire term of the option, and that the option is exercised
    and sold on the last day of its term for the appreciated stock price. Actual
    gains, if any, on stock option exercises will depend on the future
    performance of the common stock and the date at which the options are
    exercised.
(2) All options were granted under the 1997 Plan. Options granted in 1998 vest
    over three years in 36 equal monthly installments.
(3) Based on an aggregate of 175,200 options granted to employees in 1998,
    including the Named Executive Officers.
 
     YEAR-END OPTION HOLDINGS. The following table sets forth certain aggregated
option information for the Named Executive Officers for the year ended December
31, 1998.
 
   AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND FISCAL YEAR END OPTION
                                     VALUES
 


                                                   NUMBER OF SECURITIES          VALUE OF UNEXERCISED
                                                        UNDERLYING                   IN-THE-MONEY
                                                  UNEXERCISED OPTIONS(#)              OPTIONS(2)
                                                ---------------------------   ---------------------------
                   NAME(1)                      EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
- ----------------------------------------------  -----------   -------------   -----------   -------------
                                                                                
Stephen K. Schultheis.........................    351,600         76,800      $3,616,800      $633,400
Dennis D. Blevins, Ph.D. .....................     44,000          4,000      $  464,971      $ 39,729
Darrell J. Adams..............................         --             --              --            --
Wilford C. Downs..............................         --             --              --            --
Jeffrey G. Uding..............................     17,600         18,400      $  175,071      $183,129

 
- -------------------------
(1) No options were exercised by the above Named Executive Officers during the
    fiscal year ended December 31, 1998.
(2) The value of unexercised options represents the difference between the
    exercise price of the options and an assumed initial public offering price
    of $11.00 per share.
 
                                       56
   58
 
STOCK OPTION PLANS
 
     1990 STOCK OPTION PLAN. Our Stock Option Plan for Employees was adopted by
the Board of Directors and approved by the stockholders on October 10, 1990. A
total of 780,000 shares of common stock have been authorized for issuance under
the 1990 Plan. As of January 31, 1999, options for 639,780 shares were
outstanding under the 1990 Plan, and no shares remained available for future
option grant.
 
     Option grants under the 1990 Plan are made at the discretion of the plan
administrator. Eligible individuals (including officers and directors), in the
case of nonqualified stock options, may be granted options to purchase shares of
common stock at an exercise price not less than 85% of the fair market value of
the common stock, determined by the plan administrator on the grant date. Option
grants have a maximum term of ten years, subject to earlier termination if the
optionee's service with us ends.
 
     The Compensation Committee administers the 1990 Plan. This committee has
complete discretion, within the scope of its administrative jurisdiction, to
determine: (1) which eligible individuals are to receive option grants; (2) the
time or times when such option grants are to be made; (3) the number of shares
subject to each such grant; (4) the fair market value of the option at the date
it is granted provided that the common stock is not publicly traded; (5) the
exercise or vesting schedule to be in effect for the option grant; (6) the
maximum term for which any granted option is to remain outstanding; and (7) the
status of any granted option as either an incentive stock option or a
non-statutory stock option under the Federal tax laws.
 
     Optionees may pay the exercise price for their options in cash or with the
consent of the Compensation Committee, in shares of common stock. If the
exercise price is paid in shares of common stock, those shares are valued at
fair market value on the exercise date.
 
     The plan administrator may cancel options outstanding under the 1990 Plan
in return for the grant of new options for the same or different number of
option shares. In that case, the exercise price per share is based on the fair
market value per share of common stock on the new grant date.
 
     If we are acquired by merger or asset sale, each outstanding option under
the 1990 Plan not otherwise assumed by the successor company will immediately
vest. Such options will then be exercisable for all of the shares subject to
that option at the time, unless the option is assumed by the successor
corporation in the acquisition.
 
     The Board of Directors may amend, modify or terminate the 1990 Plan at any
time. The 1990 Plan will terminate on October 11, 2000, unless sooner terminated
by the Board. No options may be granted under the 1990 Plan after it is
terminated.
 
     1997 STOCK INCENTIVE PLAN. Our 1997 Stock Incentive Plan was adopted by the
Board of Directors and approved by the stockholders on January 23, 1998. A total
of 600,000 shares of common stock have been authorized for issuance under the
1997 Plan, and as of January 31, 1999 that 332,400 option shares remained
available for grant under the 1997 Plan.
 
     The 1997 Plan is divided into two separate components: the Option Grant
Program and the Stock Issuance Program. Under the Option Grant Program, eligible
individuals (including officers, non-employee Board members and consultants) may
be granted options to purchase shares of common stock at an exercise price not
less than 100% of their fair
 
                                       57
   59
 
market value on the grant date as determined by the plan administrator. Under
the Stock Issuance Program, these individuals may be issued shares of common
stock directly. The individual may purchase the shares at a price not less than
100% of their fair market value at the time of issuance; however, the purchase
price per share issued to a 10% stockholder may not be less than 110% of the
fair market value of the underlying common stock. Shares of common stock may
also be granted as a bonus tied to the performance of services.
 
     The Compensation Committee administers the 1997 Plan. The plan
administrator has complete discretion to determine: (1) which eligible
individuals are to receive option grants or stock issuances under those
programs; (2) the time or times when such option grants or stock issuances are
to be made; (3) the number of shares subject to each such grant or issuance; (4)
the fair market value of the option at the date it is granted provided that the
common stock is not publicly traded; (5) the status of any granted option as
either an incentive stock option or a non-statutory stock option under the
Federal tax laws; (6) the vesting schedule to be in effect for the option grant
or stock issuance; and (7) the maximum term for which any granted option is to
remain outstanding.
 
     Optionees may pay the exercise price for their options in cash or in shares
of common stock. If the exercise price is paid in shares of common stock, those
shares are valued at fair market value on the exercise date.
 
     Once the common stock subject to the 1997 Plan has been registered under
Section 12 of the Securities Exchange Act of 1934, as amended, the options may
also be exercised through a same-day sale program without any cash outlay by the
optionee. In addition, the plan administrator may provide financial assistance
to one or more optionees in the exercise of their outstanding options or the
purchase of their unvested shares. The plan administrator may allow these
optionees to deliver a full-recourse, interest-bearing promissory note in
payment of the exercise price. The note would also cover any associated
withholding taxes incurred in connection with such exercise or purchase.
 
     If we are acquired by merger or asset sale, options outstanding under the
Option Grant Program which are not to be assumed by the successor corporation or
otherwise continued will automatically accelerate. All unvested shares under the
Option Grant and Stock Issuance Programs will immediately vest, unless our
repurchase rights with respect to those shares will be assigned to the successor
corporation. The plan administrator may grant options under the Option Grant
Program which accelerate upon an acquisition of ANSYS, whether or not those
options are assumed or continued. The plan administrator may also grant options
which accelerate if the optionee's service terminates within the 18 months
following an acquisition in which (1) those options are assumed or otherwise
continued and (2) the applicable repurchase rights do not terminate. The vesting
of outstanding shares under the Stock Issuance Program may be accelerated on
similar terms and conditions.
 
     The Board of Directors may amend or modify the 1997 Plan at any time.
However, certain amendments to the 1997 Plan may require shareholder approval.
The 1997 Plan will terminate on the earliest of: (1) January 22, 2008; (2) the
date on which all shares available for issuance under the 1997 Plan have been
issued as fully-vested shares; or (3) the termination of all outstanding options
in connection with an acquisition of ANSYS.
 
                                       58
   60
 
     OTHER OPTIONS. In December 1996, Stephen K. Schultheis, our Chairman,
President and Chief Executive Officer, was granted options to purchase 90,000
shares of common stock at an exercise price of $1.07 per share. These options
were nonqualified stock options and were not granted pursuant to the 1990 Plan
or the 1997 Plan.
 
401(k) PLAN
 
     We have an employee savings and retirement plan that qualifies as a
deferred salary arrangement under Section 401(k) of the Internal Revenue Code.
The 401(k) Plan allows eligible employees to defer up to 15% of their pre-tax
earnings, subject to the Internal Revenue Service annual contribution limit
($10,000 in 1998). Eligible employees must be 20 1/2 years of age and have
worked at least 1,000 hours in a 12 consecutive month period. Employees may
first participate on the first day of the month following three months of
service.
 
LIMITATION OF LIABILITY AND INDEMNIFICATION MATTERS
 
     Under Section 145 of the Delaware General Corporation Law, we can indemnify
our directors and officers against liabilities they may incur in these
capacities, including liabilities under the Securities Act. Our bylaws provide
that we will indemnify our directors and officers to the fullest extent
permitted by law. The bylaws require ANSYS to advance litigation expenses, but
the director or officer must agree to repay such advances if he or she is not
entitled to indemnification. These rights do not exclude any other right such
persons may have or acquire under any bylaw, agreement, vote of stockholders or
disinterested directors, or otherwise.
 
     Our certificate of incorporation provides that, pursuant to Delaware Law,
directors are not liable for money damages for breach of their fiduciary duty of
care to ANSYS and its stockholders. This provision does not eliminate the duty
of care. In certain circumstances equitable remedies such as injunctive or other
forms of non-monetary relief will remain available under Delaware Law. In
addition, each director will still be subject to liability for (1) breach of the
duty of loyalty to ANSYS or its stockholders, (2) acts or omissions not in good
faith or involving intentional misconduct or knowing violations of law, (3)
actions leading to improper personal benefit to the director, and (4) payment of
dividends or approval of stock repurchases or redemptions that are unlawful
under Delaware Law. The provision also does not affect a director's
responsibilities under any other law, such as the Federal securities laws or
state or federal environmental laws.
 
     In addition to the indemnification provided for in our bylaws, we have
entered into agreements to indemnify our executive officers and all of our
directors. This indemnification includes indemnity for certain expenses,
including attorneys' fees. It also includes indemnity for judgments, fines and
settlement amounts incurred in any action or proceeding. The indemnification
includes: (1) actions by or for ANSYS; (2) actions on account of services as an
executive officer or a director of ANSYS; and (3) actions on account of services
as an officer or a director of another company or enterprise if the services
were provided at our request.
 
     The Securities and Exchange Commission is of the opinion that
indemnification of directors, officers and persons controlling ANSYS for
violations of the Securities Act is against public policy as expressed in the
Securities Act and is therefore unenforceable.
 
     We have also obtained directors' and officers' liability insurance for our
directors and executive officers.
 
                                       59
   61
 
                             PRINCIPAL STOCKHOLDERS
 
     The following table sets forth certain information as of January 31, 1999
regarding the ownership of our common stock by: (a) each person who is known by
us to own more than 5% of such shares of common stock; (b) each Named Executive
Officer; (c) each of our directors; and (d) all of our directors and executive
officers as a group.
 
     The number of shares beneficially owned and the percentage of shares
beneficially owned are based on (1) 5,516,512 shares of common stock outstanding
as of January 31, 1999, and (2) 8,016,512 shares of common stock outstanding
upon consummation of this offering. Beneficial ownership is determined in
accordance with the rules and regulations of the Securities and Exchange
Commission. Shares subject to options that are exercisable currently or within
60 days following January 31, 1999 are deemed to be outstanding and beneficially
owned by the optionee for the purpose of computing share and percentage
ownership of that optionee. They are not deemed to be outstanding for the
purpose of computing the percentage ownership of any other person. Except (1) as
indicated in the footnotes to this table, and (2) as affected by applicable
community property laws, all persons listed have sole and voting investment
power with for all shares shown as beneficially owned by them.
 


                                                                    PERCENT OF SHARES
                                                                    BENEFICIALLY OWNED
                                                                   --------------------
                                              NUMBER OF SHARES     PRIOR TO     AFTER
  NAME AND ADDRESS OF BENEFICIAL OWNER(1)    BENEFICIALLY OWNED    OFFERING    OFFERING
  ---------------------------------------    ------------------    --------    --------
                                                                      
Ronald J. Hall(2)(3).......................      3,808,844           69.0%       47.5%
Hall, Morris & Drufva II, L.P.(3)..........      3,616,620           65.6        45.1
C. Michael O'Donnell, Ph.D. ...............        509,808            9.2         6.4
Stephen K. Schultheis......................        450,150(4)         7.7         5.4
Darrell J. Adams...........................        345,516            6.3         4.3
Wilford C. Downs...........................        345,516            6.3         4.3
George D. Holmes...........................         54,000(5)           *           *
Dennis D. Blevins, Ph.D. ..................         44,660(5)           *           *
Jeffrey G. Uding...........................         22,400(5)           *           *
John M. Morris(6)..........................             --              *           *
William C. Shepherd........................             --              *           *
All executive officers and directors as a
  group
  (12 persons)(7)..........................      5,623,200           93.2        65.9

 
- -------------------------
 *  Less than one percent.
 
(1) The address for each of Messrs. O'Donnell, Schultheis, Adams and Downs is
    c/o ANSYS at 25200 Commercentre Drive, Lake Forest, California 92630.
(2) Includes (a) 3,616,620 shares of common stock held by Hall, Morris & Drufva
    II, L.P. and (b) 192,224 shares of common stock held by Mr. Hall's IRA. Mr.
    Hall is the Managing General Partner of Hall Capital Management, which is
    the General Partner of Hall, Morris & Drufva II, L.P. Mr. Hall disclaims
    beneficial ownership of all of the shares held by Hall, Morris & Drufva II,
    L.P.
(3) The address for Hall, Morris & Drufva II, L.P. and Mr. Hall is 26161 La Paz
    Road, Suite E, Mission Viejo, California 92691.
(4) Includes 356,550 shares of common stock issuable upon exercise of vested
    stock options.
(5) Consists solely of shares of common stock issuable upon exercise of vested
    stock options.
(6) Excludes the shares of common stock that Mr. Morris may have a right to
    receive in the event of the dissolution of Hall, Morris & Drufva II, L.P.
    See "Underwriting."
(7) Includes 519,916 shares of common stock issuable upon exercise of vested
    stock options.
 
                                       60
   62
 
                          DESCRIPTION OF CAPITAL STOCK
 
     The following summary of the capital stock of ANSYS and certain provisions
of our certificate of incorporation and bylaws does not purport to be complete.
It is qualified in its entirety by the provisions of the certificate and bylaws.
Copies of the certificate and bylaws have been filed as exhibits to the
registration statement of which this prospectus is a part.
 
COMMON STOCK
 
     ANSYS is authorized to issue 30,000,000 shares of common stock. At December
31, 1998, 5,516,512 shares of common stock were deemed outstanding and held of
record by approximately 12 holders. Under the certificate and bylaws, holders of
common stock will not have cumulative voting rights after the common stock is
listed for trading on the Nasdaq National Market. Holders of shares representing
a majority of the voting power of common stock can elect all of the directors.
The holders of the remaining shares will not be able to elect any directors. The
shares of common stock offered pursuant to this offering, when issued, will be
fully paid and nonassessable and will not be subject to any redemption or
sinking fund provisions. Holders of common stock do not have any preemptive,
subscription or conversion rights.
 
     Holders of common stock are entitled to receive those dividends the Board
declares, subject to the rights of preferred stockholders and the terms of any
existing or future agreements between ANSYS and its debtholders. Since its
inception, we have not declared or paid any cash dividends on our common stock.
We presently intend to retain future earnings, if any, for use in the operation
and expansion of our business. We do not anticipate paying cash dividends in the
foreseeable future. See "Dividend Policy." In the event of a liquidation,
dissolution or winding up of ANSYS, common stockholders are entitled to share
ratably in all assets legally available for distribution (1) after payment of
all debts and other liabilities and (2) subject to the prior rights of any
holders of outstanding shares of preferred stock.
 
PREFERRED STOCK
 
     Our certificate of incorporation authorizes 5,000,000 shares of preferred
stock. The preferred stock may be issued in series from time to time as the
Board of Directors determines. The Board of Directors determines the
designations, relative rights, priorities, preferences, qualifications,
limitations and restrictions of the preferred stock, unless they are fixed in
our certificate of incorporation. The characteristics of different series of
preferred stock may differ with respect to: (1) dividend rates; (2) amounts
payable on liquidation; (3) voting rights; (4) conversion rights; (5) redemption
provisions; (6) sinking fund provisions; and (7) other matters. The Board may
authorize preferred stock senior to the common stock with respect to dividends
and the distribution of assets on liquidation. The Board may also set
limitations and restrictions on payment of common stock dividends while any
shares of preferred stock are outstanding. No stockholder approval is required
for the Board to issue preferred stock with voting and conversion rights which
could adversely affect the voting power of the holders of common stock.
 
     We believe that the ability to issue preferred stock without the expense
and delay of a special stockholders' meeting will provide us with increased
flexibility in structuring possible future financings and acquisitions, and in
meeting other corporate needs that might arise. This also permits the Board of
Directors to issue preferred stock containing terms which could impede the
completion of a takeover attempt, subject to certain
 
                                       61
   63
 
limitations imposed by the securities laws. The Board of Directors will make any
determination to issue such shares based on its judgment as to the best
interests of ANSYS and its stockholders at the time of issuance. This could
discourage an acquisition attempt or other transaction which stockholders might
believe to be in their best interests or in which they might receive a premium
for their stock over the then market price of the stock.
 
ANTI-TAKEOVER PROVISIONS
 
     Our certificate of incorporation and bylaws contain provisions that may
make it more difficult to acquire control of ANSYS by various means. These
provisions could deprive the stockholders of opportunities to realize a premium
on the shares of common stock owned by them. In addition, they may adversely
affect the prevailing market price of the stock. These provisions are intended
to: (1) enhance the likelihood of continuity and stability in the composition of
the Board and in the policies formulated by the Board; (2) discourage
transactions which may involve an actual or threatened change in control of
ANSYS; (3) discourage tactics that may be used in proxy fights; (4) encourage
persons seeking to acquire control of ANSYS to consult first with the Board to
negotiate the terms of any proposed business combination or offer; and (5)
reduce our vulnerability to an unsolicited proposal for a takeover that does not
contemplate the acquisition of all outstanding shares of ANSYS or that is
otherwise unfair to our stockholders.
 
     CLASSIFIED BOARD OF DIRECTORS; REMOVAL; FILLING VACANCIES AND
AMENDMENT. Our certificate of incorporation provides that the Board will consist
of between five and nine members, the exact number to be fixed from time to time
by resolution adopted by a majority of the directors then in office. Currently,
the number is set at six. The certificate and bylaws provide for the Board to be
divided into three classes of directors serving staggered, three-year terms. The
classification of the Board has the effect of requiring at least two annual
stockholder meetings, instead of one, to replace a majority of members of the
Board. Subject to the rights of the holders of any outstanding series of
preferred stock, the certificate authorizes only the Board to fill vacancies,
including newly created directorships. Accordingly, this provision could prevent
a stockholder from obtaining majority representation on the Board by enlarging
the Board and filling the new directorships with its own nominees. The
certificate also provides that directors may be removed by stockholders only for
cause and only by the affirmative vote of holders of two-thirds of the
outstanding shares of voting stock.
 
     SPECIAL STOCKHOLDER MEETINGS. The certificate of incorporation provides
that special meetings of the stockholders for any purpose or purposes, unless
required by law, shall be called by: (1) the President or Secretary pursuant to
a request in writing of the President; (2) a majority of the entire Board; or
(3) stockholders owning not less than 50% of the entire voting stock of ANSYS
then issued and outstanding. A special meeting may not be held absent such a
written request. The request shall state the purpose or purposes of the proposed
meeting. This limitation on the right of stockholders to call a special meeting
could make it more difficult for stockholders to initiate actions that are
opposed by the Board. These actions could include the removal of an incumbent
director or the election of a stockholder nominee as a director. They could also
include the implementation of a rule requiring stockholder ratification of
specific defensive strategies that have been adopted by the Board with respect
to unsolicited takeover bids. In addition, the limited ability of the
stockholders to call a special meeting of stockholders may make it more
difficult to change the existing board and management.
 
                                       62
   64
 
     WRITTEN CONSENT; SPECIAL MEETINGS OF STOCKHOLDERS. Our certificate of
incorporation prohibits the taking of stockholder action by written consent
without a meeting. These provisions will make it more difficult for stockholders
to take action opposed by the Board.
 
     AMENDMENT OF PROVISIONS OF OUR CERTIFICATE OF INCORPORATION. Our
certificate of incorporation generally requires the affirmative vote of the
holders of at least two-thirds of the outstanding voting stock in order to amend
any provisions of the certificate concerning: (1) the removal or appointment of
directors; (2) the authority of stockholders to act by written consent; (3) the
required vote to amend the certificate; (4) calling a special meeting of
stockholders; (5) procedure and content of stockholder proposals concerning
business to be conducted at a meeting of stockholders; and (6) director
nominations by stockholders. These voting requirements will make it more
difficult for minority stockholders to make changes in the certificate that
could be designed to facilitate the exercise of control over ANSYS. On the other
hand, the requirement for approval by at least a two-thirds stockholder vote
will enable minority stockholders to prevent the majority stockholders from
amending these provisions of the certificate. Following the completion of this
offering, our present directors and executive officers and their respective
affiliates will beneficially own approximately 65.9% of our common stock. This
gives them veto power with respect to any stockholder action or approval
requiring either a two-thirds vote or a simple majority.
 
REGISTRATION RIGHTS
 
     Following this offering, the holders of approximately 5,498,112 shares of
common stock (the "Registrable Securities") will be entitled to certain rights
with respect to the registration of their shares under the Securities Act. If
ANSYS proposes to register securities under the Securities Act, either for its
own account or the account of other securityholders, it must give notice of the
registration to the holders of Registrable Securities. These holders are
entitled to include their Registrable Securities in the registration, subject to
certain marketing and other limitations. We generally must bear the expenses,
other than underwriting discounts and sales commissions, of these registrations.
We may in certain circumstances defer such registrations. The underwriters have
the right, subject to certain limitations, to limit the number of Registrable
Securities included in such registrations.
 
TRANSFER AGENT AND REGISTRAR
 
     The transfer agent and registrar for our common stock is U.S. Stock
Transfer Corporation.
 
                                       63
   65
 
                        SHARES ELIGIBLE FOR FUTURE SALE
 
     Upon completion of the offering, ANSYS will have 8,016,512 shares of common
stock outstanding (8,391,512 shares if the underwriter's over-allotment option
is exercised in full), assuming no exercise of options after January 31, 1999.
Of this amount, the 2,500,000 shares offered by this prospectus will be
available for immediate sale in the public market as of the date of this
prospectus. All of the remaining 5,516,512 shares are "restricted securities" as
that term is defined by Rule 144 of the Securities Act. Our directors, executive
officers and certain other stockholders who collectively hold an aggregate of
5,498,112 shares of common stock, together with ANSYS, have agreed pursuant to
the underwriting agreement and other agreements that they will not sell any
common stock without the prior written consent of Vector Securities
International, Inc. for a period of 180 days from the date of this prospectus
except that we may, without this consent, grant options and sell shares pursuant
to the 1997 Plan. Following the 180 day period, 332,764 shares of common stock
will be eligible for sale in the public market without restriction, including
shares eligible for sale under Rule 144(k). An additional 5,165,348 shares will
be eligible for sale under Rule 144, subject to certain volume, manner of sale
and other restrictions of Rule 144. In addition, 18,400 shares will be available
for sale in the public market 90 days following the date of this prospectus.
 
     In general, under Rule 144 as currently in effect, a person (or persons
whose shares are aggregated) who has beneficially owned shares for at least one
year is entitled to sell within any three-month period commencing 90 days after
the date of this prospectus a number of shares that does not exceed the greater
of (1) 1% of the then outstanding shares of common stock (approximately 80,165
shares immediately after this offering) or (2) the average weekly trading volume
during the four calendar weeks preceding such sale, subject to the filing of a
Form 144 with respect to such sale. A person (or persons whose shares are
aggregated) who is not deemed to have been an affiliate of ANSYS at any time
during the 90 days immediately preceding the sale and who has beneficially owned
his or her shares for at least two years is entitled to sell such shares
pursuant to Rule 144(k) without regard to the limitations described above.
Persons deemed to be affiliates must always sell pursuant to Rule 144, even
after the applicable holding periods have been satisfied.
 
     We are unable to estimate the number of shares that will be sold under Rule
144, since this will depend on the market price for our common stock, the
personal circumstances of the sellers and other factors. Prior to this offering,
there has been no public market for the common stock, and there can be no
assurance that a significant public market for the common stock will develop or
be sustained after this offering. Any future sale of substantial amounts of the
common stock in the open market may adversely affect the market price of the
common stock offered by this prospectus.
 
     Any employee or consultant who purchased his or her shares pursuant to a
written compensatory plan or contract is entitled to rely on the resale
provisions of Rule 701, which permits nonaffiliates to sell their Rule 701
shares without having to comply with the public information, holding period,
volume limitation or notice provisions of Rule 144 and permits affiliates to
sell their Rule 701 shares without having to comply with the Rule 144 holding
period restrictions, in each case commencing 90 days after the date of this
prospectus. As of January 31, 1999, the holders of options to purchase
approximately 997,380 shares of common stock will be eligible to sell their
shares upon the expiration of the 180-day Lockup Period, subject in certain
cases to vesting of such options.
 
                                       64
   66
 
     We intend to file a registration statement on Form S-8 under the Securities
Act as soon as practicable after the completion of this offering to register
1,329,780 shares of common stock subject to outstanding stock options or
reserved for issuance under our 1990 Plan and our 1997 Plan. This registration
will permit the resale of such shares by nonaffiliates in the public market
without restriction under the Securities Act, upon completion of the 180-day
Lockup Period. Shares held by affiliates registered under such registration
statement will be subject to Rule 144 volume limitations. See "Management --
Executive Compensation" and "-- Stock Option Plans."
 
     In addition, some stockholders have registration rights with respect to
5,498,112 shares of common stock. Registration of these securities would render
them freely tradeable without restriction under the Securities Act. See "Risk
Factors -- A Significant Number of Shares are Available for Sale and Their Sale
Could Depress Our Stock Price."
 
                                       65
   67
 
                                  UNDERWRITING
 
     Subject to the terms and conditions of the underwriting agreement, the
underwriters named below, for whom Vector Securities International, Inc. and
Sutro & Co. Incorporated are acting as representatives, have severally agreed to
purchase and we have agreed to sell to the underwriters, the following
respective number of shares of common stock.
 


                     UNDERWRITERS                        NUMBER OF SHARES
                     ------------                        ----------------
                                                      
Vector Securities International, Inc...................
Sutro & Co. Incorporated...............................
                                                            ---------
          Total........................................     2,500,000
                                                            =========

 
     John M. Morris, a director of ANSYS, is a Managing Director of Sutro & Co.
Incorporated, one of the representatives of the underwriters. Mr. Morris has an
equity interest in Hall, Morris & Drufva II, L.P. which, upon its liquidation
will result in Mr. Morris receiving approximately 125,000 of ANSYS common stock.
 
     The underwriting agreement makes the obligations of the underwriters
subject to a number of conditions, including the absence of any material adverse
change in our business and the receipt of certificates, opinions and letters
from us, our counsel and our experts. If any of the shares are purchased, the
underwriters' must purchase all shares of common stock being offered. If any
underwriter defaults in its obligation to purchase shares, and the aggregate
obligations of the defaulting underwriters do not exceed 10% of the shares
offered, some or all of the remaining underwriters must assume the obligations
of the defaulting underwriters.
 
     The underwriters propose to offer the shares of common stock directly to
the public at the offering price set forth on the cover page of this prospectus.
They propose to offer shares to certain dealers at that price less a concession
not in excess of $     per share. The underwriters may allow to certain dealers
and the dealers may reallow a concession not in excess of $     per share to
other dealers. After the initial public offering of the shares, the offering
price and other selling terms may be changed by the representatives of the
underwriters.
 
     We have granted the underwriters an option, exercisable no later than 30
days after the date of this prospectus, to purchase up to 375,000 additional
shares of common stock at the public offering price, less underwriting discounts
and commissions. The underwriters may exercise this option solely for the
purpose of covering over-allotments, if any, in connection with this offering.
Subject to a number of conditions, if this option is exercised, each underwriter
must purchase approximately the same percentage of over-allotment shares as the
number of shares set forth next to each underwriter's name in the preceding
table bears to the total number of shares listed in the table above. We must
sell these shares to the underwriters if the option is exercised.
 
     The following table summarizes the compensation we will pay to the
underwriters:
 


                                                   WITHOUT            WITH
                                    PER SHARE   OVER-ALLOTMENT   OVER-ALLOTMENT
                                    ---------   --------------   --------------
                                                        
Total underwriting discounts and
  commissions.....................      $             $                $

 
                                       66
   68
 
     In connection with this offering, the underwriters may engage in
transactions that stabilize, maintain or otherwise affect the price of the
common stock. Specifically, the underwriters may over-allot this offering,
creating a syndicate short position. In addition, the underwriters may bid for
and purchase shares of common stock in the open market to cover syndicate short
positions or to stabilize the price of the common stock. Finally, the
underwriting syndicate may reclaim selling concessions from syndicate members in
this offering if the syndicate repurchases previously distributed common stock
in syndicated covering transactions, in stabilization transactions or otherwise.
Any of these activities may stabilize or maintain the market price of the common
stock above independent market levels. The underwriters are not required to
engage in these activities, and may end any of these activities at any time.
 
     The representatives of the underwriters have advised us that the
underwriters do not intend to confirm sales to any accounts over which they
exercise discretionary authority.
 
     We have agreed to indemnify the underwriters against certain liabilities,
including liabilities under the Securities Act, or to contribute to payments the
underwriters may be required to make with respect to these liabilities.
 
     The officers, directors and certain other of our stockholders have agreed
that they will not, without the prior consent of Vector Securities
International, Inc., offer, sell or otherwise dispose of: (1) any shares of
common stock; (2) options or warrants to acquire shares of common stock; or (3)
securities exchangeable for or convertible into shares of common stock owned by
them for a period of 180 days after the date of this prospectus. We have agreed
not to offer, sell or otherwise dispose of any of the above securities for a
period of 180 days after the date of this prospectus. See "Shares Eligible for
Future Sale."
 
     Prior to this offering, there has been no public market for the common
stock. Consequently, the initial public offering price for the shares of common
stock included in this offering will be determined by negotiations between us
and the representatives of the underwriters. Among the factors considered in
determining the price will be:
 
     - the history of, and the prospects for, our business and the industry in
       which we compete;
 
     - an assessment of our management and the present state of our development;
 
     - our past and present revenues and earnings;
 
     - the prospects for growth of our revenues and earnings;
 
     - the current state of the economy in the United States;
 
     - the current level of economic activity in the industry in which we
       compete and in related or comparable industries; and
 
     - currently prevailing conditions in the securities markets, including
       current market valuations of publicly traded companies that are
       comparable to ANSYS.
 
     We have applied to list our common stock on the Nasdaq National Market
under the symbol "ANSD."
 
                                       67
   69
 
                                 LEGAL MATTERS
 
     The validity of the issuance of the shares of common stock offered by this
prospectus will be passed upon for ANSYS by Brobeck, Phleger & Harrison LLP,
Irvine, California. Certain legal matters relating to this offering will be
passed upon for the underwriters by Skadden, Arps, Slate, Meagher & Flom
(Illinois), Chicago, Illinois.
 
                                    EXPERTS
 
     The consolidated financial statements of ANSYS as of December 31, 1997 and
1998 and for each of the three years in the period ended December 31, 1998,
included in this prospectus and the registration statement have been audited by
McGladrey & Pullen, LLP, independent auditors, as set forth in their report
appearing on page F-2 of this prospectus and in the registration statement. The
financial statements are included in reliance upon that report given upon the
authority of that firm as experts in accounting and auditing.
 
                             ADDITIONAL INFORMATION
 
     ANSYS has filed a registration statement on Form S-1 with the Securities
and Exchange Commission under the Securities Act with respect to the common
stock offered by this prospectus. This prospectus does not contain all of the
information set forth in the registration statement and the exhibits and
schedules thereto. For further information with respect to ANSYS and the common
stock, please see the registration statement and the exhibits and schedules
filed with the registration statement. Statements contained in this prospectus
concerning the contents of any contract of other document referred to are not
necessarily complete. Please refer to the copy of such contract or other
document filed as an exhibit to the registration statement. Each such statement
is qualified in all respects by such reference. The registration statement,
including the exhibits and schedules thereto, may be inspected without charge at
the principal office of the Commission in Washington, D.C. Copies of all or any
part of the registration statement may be inspected and copied at the public
reference facilities maintained by the Commission at 450 Fifth Street, N.W.,
Room 1024, Washington, D.C. 20549. Such copies may also be inspected and copied
at the Commission's Regional Offices located at:
 
     - Citicorp Center, 500 West Madison Street, Suite 1400, Chicago, Illinois
       60661-2511; and
 
     - 7 World Trade Center, Suite 1300, New York, New York 10048.
 
     Copies of such material may be obtained at prescribed rates by mail from
the public reference section of the Commission at 450 Fifth Street, N.W.,
Washington, D.C. 20549. In addition, the Securities and Exchange Commission
maintains an Internet site at http://www.sec.gov that contains reports, proxy
and information statements and other information regarding registrants,
including ANSYS, that file electronically.
 
                                       68
   70
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 


                                                              PAGE
                                                              ----
                                                           
Independent Auditor's Report................................  F-2
Consolidated Balance Sheets.................................  F-3
Consolidated Statements of Income...........................  F-4
Consolidated Statements of Stockholders' Equity.............  F-5
Consolidated Statements of Cash Flows.......................  F-6
Notes to Consolidated Financial Statements..................  F-7

 
                                       F-1
   71
 
                          INDEPENDENT AUDITOR'S REPORT
 
To the Board of Directors
ANSYS Diagnostics, Inc.
Lake Forest, California
 
     We have audited the accompanying consolidated balance sheets of ANSYS
Diagnostics, Inc. and subsidiary as of December 31, 1997 and 1998, and the
related consolidated statements of income, stockholders' equity and cash flows
for each of the three years in the period ended December 31, 1998. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audits to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
     In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of ANSYS
Diagnostics, Inc. and subsidiary as of December 31, 1997 and 1998 and the
results of their operations and their cash flows for each of the three years in
the period ended December 31, 1998 in conformity with generally accepted
accounting principles.
 
     The above form of auditor's report represents the form of report that
McGladrey & Pullen, LLP would be willing to issue assuming the consummation of
the reorganization as described in Note 1 had taken place. The reorganization is
expected to occur prior to the effective date of the Company's planned offering
of 2,500,000 shares of common stock.
 
                                          McGladrey & Pullen, LLP
Anaheim, California
January 29, 1999
 
                                       F-2
   72
 
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
                          CONSOLIDATED BALANCE SHEETS
 


                                                            DECEMBER 31,              PRO FORMA
                                                      -------------------------   DECEMBER 31, 1998
                                                         1997          1998           (NOTE 11)
                                                      ----------    -----------   -----------------
                                                                                     (UNAUDITED)
                                                                         
ASSETS (Note 4)
Current Assets
  Cash and cash equivalents.........................  $1,515,000    $ 3,176,000      $  916,000
  Accounts receivable, less allowance for doubtful
     accounts 1997 $20,000; 1998 $20,000 (Note 8)...   1,707,000      2,093,000       2,093,000
  Income taxes receivable...........................          --        420,000         420,000
  Inventories (Note 2)..............................   1,528,000      1,581,000       1,581,000
  Prepaid expenses..................................      99,000         40,000          40,000
  Deferred income taxes (Note 7)....................      89,000        120,000         120,000
                                                      ----------    -----------      ----------
       Total current assets.........................   4,938,000      7,430,000       5,170,000
Equipment and Leasehold Improvements, net (Note
  3)................................................   1,567,000      4,199,000       4,199,000
Intangibles and Other Assets........................     160,000        262,000         262,000
Deferred Income Taxes (Note 7)......................     228,000             --              --
                                                      ----------    -----------      ----------
       Total assets.................................  $6,893,000    $11,891,000      $9,631,000
                                                      ==========    ===========      ==========
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities
  Bank line of credit (Note 4)......................  $  733,000    $        --      $       --
  Current maturities of long-term debt (Note 4).....          --        224,000         224,000
  Accounts payable..................................     553,000      1,439,000       1,439,000
  Accrued liabilities...............................     121,000        433,000         433,000
  Accrued compensation..............................     311,000        281,000         281,000
  Income taxes payable..............................     218,000             --              --
                                                      ----------    -----------      ----------
       Total current liabilities....................   1,936,000      2,377,000       2,377,000
                                                      ----------    -----------      ----------
Deferred Income Taxes (Note 7)......................          --        180,000         180,000
                                                      ----------    -----------      ----------
Long-term Debt, net of current maturities (Note
  4)................................................          --      1,670,000       1,670,000
                                                      ----------    -----------      ----------
Commitments and Contingencies (Notes 6 and 8)
Stockholders' Equity (Notes 4, 5, 9 and 11)
  Preferred stock, par value $.0001 per share;
     5,000,000 shares authorized: 18,000 issued and
     outstanding in 1997 and 1998, none outstanding
     pro forma ($3,600,000 aggregate liquidation
     preference including $1,800,000 of undeclared
     cumulative dividends at December 31, 1998
     amounting to $100 per share)...................          --             --              --
  Common stock, par value $.0001 per share;
     30,000,000 shares authorized: issued and
     outstanding 1,880,784 shares in 1997; 1,875,184
     shares in 1998; 5,516,512 shares pro forma.....          --             --              --
  Additional paid-in capital........................   1,818,000      1,834,000       1,434,000
  Retained earnings.................................   3,139,000      5,830,000       3,970,000
                                                      ----------    -----------      ----------
       Total stockholders' equity...................   4,957,000      7,664,000       5,404,000
                                                      ----------    -----------      ----------
       Total liabilities and stockholders' equity...  $6,893,000    $11,891,000      $9,631,000
                                                      ==========    ===========      ==========

 
See Notes to Consolidated Financial Statements.
 
                                       F-3
   73
 
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
                       CONSOLIDATED STATEMENTS OF INCOME
 


                                                 YEARS ENDED DECEMBER 31,
                                         ----------------------------------------
                                            1996          1997           1998
                                         ----------    -----------    -----------
                                                             
Net sales (Note 8).....................  $8,126,000    $10,698,000    $18,964,000
Cost of goods sold.....................   3,058,000      5,099,000      9,703,000
                                         ----------    -----------    -----------
       Gross profit....................   5,068,000      5,599,000      9,261,000
                                         ----------    -----------    -----------
Operating expenses:
  Research and development.............     434,000        773,000        700,000
  Selling, general and administrative
     (Notes 6 and 9)...................   2,770,000      2,876,000      4,049,000
                                         ----------    -----------    -----------
                                          3,204,000      3,649,000      4,749,000
                                         ----------    -----------    -----------
Operating income.......................   1,864,000      1,950,000      4,512,000
Interest income (expense)..............      55,000         59,000        (46,000)
                                         ----------    -----------    -----------
Income before income taxes.............   1,919,000      2,009,000      4,466,000
Provision for income taxes (Note 7)....     718,000        803,000      1,775,000
                                         ----------    -----------    -----------
       Net income (Note 9).............  $1,201,000    $ 1,206,000    $ 2,691,000
                                         ==========    ===========    ===========
Less preferred stock dividends (Note
  5)...................................     180,000        180,000        180,000
                                         ----------    -----------    -----------
       Income available to common
          stockholders.................  $1,021,000    $ 1,026,000    $ 2,511,000
                                         ==========    ===========    ===========
Earnings per share (Note 9):
  Basic................................  $     0.46    $      0.54    $      1.33
                                         ==========    ===========    ===========
  Diluted (Note 10)....................  $     0.19    $      0.20    $      0.45
                                         ==========    ===========    ===========
Weighted average shares outstanding:
  Basic................................   2,230,408      1,900,951      1,890,204
                                         ==========    ===========    ===========
  Diluted (Note 10)....................   6,057,018      5,863,517      5,941,534
                                         ==========    ===========    ===========
Pro forma earnings per share (Note 11):
  Basic................................  $     0.20    $      0.21    $      0.47
                                         ==========    ===========    ===========
  Diluted..............................  $     0.19    $      0.20    $      0.44
                                         ==========    ===========    ===========
Pro forma weighted average shares
  outstanding (Note 11):
  Basic................................   6,077,191      5,747,734      5,736,987
                                         ==========    ===========    ===========
  Diluted..............................   6,262,473      6,068,972      6,146,989
                                         ==========    ===========    ===========

 
See Notes to Consolidated Financial Statements.
 
                                       F-4
   74
 
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
 


                                  PREFERRED STOCK        COMMON STOCK
                                 ------------------   ------------------   ADDITIONAL
                                  NUMBER               NUMBER               PAID-IN      RETAINED
                                 OF SHARES   AMOUNT   OF SHARES   AMOUNT    CAPITAL      EARNINGS
                                 ---------   ------   ---------   ------   ----------   ----------
                                                                      
Balance, December 31, 1995.....   18,000     $  --    2,307,408   $  --    $$2,011,000  $1,072,000
  Exercise of stock options....       --        --        4,080      --         1,000           --
  Common stock purchased for
     retirement................       --        --     (250,704)     --      (195,000)    (117,000)
  Net income...................       --        --           --      --            --    1,201,000
                                  ------     ------   ---------   ------   ----------   ----------
Balance, December 31, 1996.....   18,000        --    2,060,784      --     1,817,000    2,156,000
  Common stock purchased for
     retirement................       --        --     (180,000)     --        (1,000)    (223,000)
  Compensation expense related
     to stock options (Note
     9)........................       --        --           --      --         2,000           --
  Net income...................       --        --           --      --            --    1,206,000
                                  ------     ------   ---------   ------   ----------   ----------
Balance, December 31, 1997.....   18,000        --    1,880,784      --     1,818,000    3,139,000
  Exercise of stock options....       --        --       18,400      --        19,000           --
  Common stock purchased for
     retirement................       --        --      (24,000)     --      (111,000)          --
  Compensation expense related
     to stock options (Note
     9)........................       --        --           --      --       108,000           --
  Net income...................       --        --           --      --            --    2,691,000
                                  ------     ------   ---------   ------   ----------   ----------
Balance, December 31, 1998.....   18,000     $  --    1,875,184   $  --    $1,834,000   $5,830,000
                                  ======     ======   =========   ======   ==========   ==========

 
See Notes to Consolidated Financial Statements.
 
                                       F-5
   75
 
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 


                                                    YEARS ENDED DECEMBER 31,
                                             --------------------------------------
                                                1996         1997          1998
                                             ----------   -----------   -----------
                                                               
Cash Flows from Operating Activities
  Net income...............................  $1,201,000   $ 1,206,000   $ 2,691,000
  Depreciation and amortization............     328,000       315,000       395,000
  Deferred taxes...........................     (42,000)      (17,000)      377,000
  Noncash compensation (Note 9)............          --         2,000       108,000
  Changes in operating assets and
     liabilities:
     Accounts receivable...................    (371,000)     (626,000)     (386,000)
     Income taxes receivable...............          --            --      (420,000)
     Inventories...........................    (279,000)     (513,000)      (53,000)
     Prepaid expenses......................     (18,000)      (63,000)       59,000
     Accounts payable and accrued
       liabilities.........................     328,000       148,000       541,000
     Income taxes payable..................     (29,000)      173,000      (218,000)
                                             ----------   -----------   -----------
       Net cash provided by operating
          activities.......................   1,118,000       625,000     3,094,000
                                             ----------   -----------   -----------
Cash Flows from Investing Activities
  Purchase of equipment and leasehold
     improvements..........................    (270,000)   (1,231,000)   (2,377,000)
  Purchase of intangibles and other
     assets................................          --      (172,000)     (125,000)
                                             ----------   -----------   -----------
       Net cash (used in) investing
          activities.......................    (270,000)   (1,403,000)   (2,502,000)
                                             ----------   -----------   -----------
Cash Flows from Financing Activities
  Borrowings on line of credit.............          --       883,000            --
  Payments on line of credit...............          --      (150,000)     (733,000)
  Common stock purchased for retirement....    (312,000)     (224,000)     (111,000)
  Common stock issued......................       1,000            --        19,000
  Long-term borrowings.....................          --            --     2,000,000
  Payments on long-term debt...............          --            --      (106,000)
                                             ----------   -----------   -----------
       Net cash provided by (used in)
          financing activities.............    (311,000)      509,000     1,069,000
                                             ----------   -----------   -----------
       Net increase (decrease) in cash and
          cash equivalents.................     537,000      (269,000)    1,661,000
Cash and Cash Equivalents
  Beginning of period......................   1,247,000     1,784,000     1,515,000
                                             ----------   -----------   -----------
  End of period............................  $1,784,000   $ 1,515,000   $ 3,176,000
                                             ==========   ===========   ===========

 
See Notes to Consolidated Financial Statements.
 
                                       F-6
   76
 
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
NOTE 1.  NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES
 
Nature of business:
 
     ANSYS Diagnostics, Inc. and its wholly owned subsidiary, ANSYS
International, Inc., a foreign sales corporation (together, the Company),
develops, manufactures and markets drug testing products and specialty
laboratory and research products. The Company's drug testing products are used
for pre-employment screening, random employee testing, government mandated
testing, parole and probation monitoring and hospital-based testing. The
Company's specialty laboratory and research products are used for sample
preparation, including solid phase extraction and nucleic acid isolation. The
Company's products are subject to approval and regulation by the Federal Drug
Administration (FDA) and other state and foreign regulatory agencies.
 
Reorganization:
 
     In connection with a planned public offering of its common stock, the
Company is undertaking a restructuring and reorganization. As a result of the
restructuring and reorganization, the Company will (1) reincorporate in
Delaware, (2) increase the number of authorized common shares to 30,000,000
shares, (3) increase the number of authorized preferred shares to 5,000,000
shares, (4) reduce the par value of the common and preferred stock to $.0001 per
share and (5) effect a 1.2-for-one stock split. This proposed reorganization has
been accounted for as if it occurred as of the beginning of the earliest period
presented in these consolidated financial statements.
 
A SUMMARY OF THE COMPANY'S SIGNIFICANT ACCOUNTING POLICIES IS AS FOLLOWS:
 
Use of estimates:
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenue and expenses during the reporting
period. Actual results could differ from those estimates.
 
Principles of consolidation:
 
     The accompanying consolidated financial statements include the accounts of
the Company and its wholly owned subsidiary. All material intercompany balances
and transactions are eliminated in consolidation.
 
Cash and cash equivalents:
 
     The Company classifies all highly liquid investments with original
maturities of less than 90 days at the time of purchase as cash and cash
equivalents.
 
     The Company, periodically throughout the year, has amounts on deposit that
exceed the insured limit.
 
                                       F-7
   77
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 1.  NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
Accounts receivable:
 
     Most of the Company's business activity is with distributors of medical
products who are primarily located in the United States and Europe. The Company
grants normal trade credit to creditworthy customers without requiring
collateral or other security.
 
Inventories:
 
     Inventories are stated at the lower of average cost or market.
 
Equipment and leasehold improvements:
 
     Equipment and leasehold improvements are carried at cost. Depreciation and
amortization are provided on a straight-line method over (1) five to ten years
for manufacturing equipment, (2) five years for office equipment, and (3) the
lesser of (a) the asset life, (b) ten years, or (c) the remaining term of the
facility lease for leasehold improvements.
 
Intangibles and other assets:
 
     Intangibles and other assets consist primarily of a licensing agreement
which is being amortized on a straight-line basis over its estimated useful life
of five years.
 
Revenue recognition:
 
     The Company recognizes revenue when goods are shipped to the customer.
 
Research and development:
 
     The Company expenses research and development costs as they are incurred.
The Company incurs research and development costs in developing new products.
 
Income taxes:
 
     Deferred taxes are provided on a liability method whereby deferred tax
assets and liabilities are recognized for deductible temporary differences.
Temporary differences are the differences between the reported amounts of assets
and liabilities and their tax bases. Deferred tax assets are reduced by a
valuation allowance when, in the opinion of management, it is more likely than
not that some portion or all of the deferred tax assets will not be realized.
Deferred tax assets and liabilities are adjusted for the effects of changes in
tax laws and rates on the date of enactment.
 
Stock-based compensation:
 
     The Company accounts for stock-based employee compensation under the
requirements of Accounting Principles Board (APB) Opinion No. 25, which does not
 
                                       F-8
   78
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 1.  NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
require compensation to be recorded if the consideration to be received is at
least equal to fair value at the measurement date. Nonemployee stock-based
transactions are accounted for under the requirements of the Financial
Accounting Standards Board's (FASB) Statement of Financial Accounting Standard
(SFAS) No. 123, Accounting for Stock Based Compensation, which requires
compensation to be recorded based on the fair value of the securities issued or
the services received, whichever is more reliably measurable. The Company
estimates market value at the measurement date by utilizing a combination of the
discounted cash flows method, comparison to comparable publicly traded companies
and book value. In addition the Company periodically uses an outside valuation
specialist to validate its estimation of fair value.
 
Earnings per share:
 
     Basic earnings per share is computed as net income available to common
stockholders divided by the weighted average number of common shares outstanding
for the period.
 
     Diluted earnings per share is computed as net income available to common
stockholders plus dividends on Series B convertible preferred stock divided by
the weighted average number of common shares outstanding for the period plus
potential dilutive common shares issuable through convertible preferred stock
and stock options.
 
Fair value of financial instruments:
 
     The Company's financial instruments consist of cash, the bank line of
credit and long term debt. The carrying value of these instruments is considered
to be representative of their fair value.
 
Determining impairment on long-term assets:
 
     In accordance with FASB Statement No. 121, Accounting for the Impairment of
Long-Lived Assets and for Long-Lived Assets to be Disposed of, the Company
records impairment losses on long-lived assets used in operations when events
and circumstances indicate that the assets might be impaired and the
undiscounted cash flows estimated to be generated by those assets are less than
the carrying amounts of those assets.
 
Segment information:
 
     In accordance with FASB Statement No. 131, Disclosures about Segments of an
Enterprise and Related Information, the Company has determined the products are
all classified as in vitro diagnostic products that are produced using similar
methods and are regulated by the Food and Drug Administration. In addition, the
Company has analyzed the type and class of customers, and the product
distribution methods, and has determined that the Company has one reportable
segment.
 
                                       F-9
   79
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 2.  INVENTORIES
 
     Inventories consisted of the following at December 31, 1997 and 1998:
 


                                                           1997          1998
                                                        ----------    ----------
                                                                
Raw materials.........................................  $  633,000    $  754,000
Work in process.......................................     363,000       433,000
Finished goods........................................     532,000       394,000
                                                        ----------    ----------
                                                        $1,528,000    $1,581,000
                                                        ==========    ==========

 
NOTE 3.  EQUIPMENT AND LEASEHOLD IMPROVEMENTS
 
     Equipment and leasehold improvements consisted of the following at December
31, 1997 and 1998:
 


                                                         1997           1998
                                                      -----------    -----------
                                                               
Manufacturing equipment.............................  $   989,000    $ 1,045,000
Office equipment....................................      985,000      1,134,000
Leasehold improvements..............................    1,302,000      2,181,000
                                                      -----------    -----------
                                                        3,276,000      4,360,000
Depreciation and amortization.......................   (2,796,000)    (1,850,000)
                                                      -----------    -----------
                                                          480,000      2,510,000
Construction in progress............................    1,087,000      1,689,000
                                                      -----------    -----------
                                                      $ 1,567,000    $ 4,199,000
                                                      ===========    ===========

 
NOTE 4.  BANK LINE OF CREDIT AND LONG-TERM DEBT
 
Bank line of credit:
 
     The Company has a revolving credit agreement with a bank to provide for
short-term financing. Under the terms of this agreement, the Company may borrow
up to $1,000,000. Borrowings under this line are restricted to a certain
percentage of accounts receivable and inventories and bear interest at the
bank's prime rate plus 0.125% (totaling 7.875% as of December 31, 1998). There
were no borrowings under this line of credit agreement at December 31, 1998.
Borrowings under the agreement at December 31, 1997 totaled $733,000. The
agreement is secured by the Company's accounts receivable, inventories,
equipment and intangibles. It also contains certain financial covenants,
restricts the payment of dividends and redemption of stock, and expires in May
1999. As of December 31, 1998, the Company had approximately $1,000,000 in
availability under this credit facility.
 
Long-term debt:
 
     At December 31, 1998, the Company has an 8.42% term loan that is secured by
inventory, equipment and intangibles and is due in monthly installments of
$32,000 through June 2005. Aggregate future annual maturities on this debt as of
December 31,
 
                                      F-10
   80
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 4.  BANK LINE OF CREDIT AND LONG-TERM DEBT (CONTINUED)
1998 are as follows: 1999 $224,000; 2000 $245,000; 2001 $266,000; 2002 $290,000;
2003 $316,000; 2004 $345,000; and 2005 $208,000 (total $1,894,000).
 
NOTE 5.  CAPITAL STOCK
 
     The following summarizes the capitalization of the Company as of December
31, 1998:
 


                                                   ISSUED AND                ADDITIONAL
                                      AUTHORIZED   OUTSTANDING                PAID-IN
           CAPITAL STOCK                SHARES       SHARES      PAR VALUE    CAPITAL
           -------------              ----------   -----------   ---------   ----------
                                                                 
Preferred Series A..................       4,000        4,000     $0.0001    $  400,000
Preferred Series B..................      14,000       14,000      0.0001     1,400,000
Preferred, undesignated.............   4,982,000           --          --            --
Common..............................  30,000,000    1,875,184      0.0001        34,000
                                                                             ----------
                                                                             $1,834,000
                                                                             ==========

 
     Preferred dividends on the Series A and B preferred stock are cumulative at
a rate of $10 per annum and are payable, if declared, on a quarterly basis. No
dividends shall be paid to common stockholders until the preferred stockholders
have received all unpaid accumulated dividends. The Company has not declared any
preferred stock dividends. Such accumulated dividends totaled $1,800,000 ($100
per share) at December 31, 1998 and $1,620,000 ($90 per share) at December 31,
1997.
 
     In the event of liquidation, the holders of the Series A and Series B
preferred stock are entitled to receive an amount per share equal to $100
(carrying value is also $100 per share) plus any unpaid accumulated dividends,
prior to any distribution of the assets of the Company to the common
stockholders.
 
     Series A Redeemable Preferred Stock -- Upon consent of the holders of the
majority of common shares, the Company may redeem the outstanding shares of
Series A redeemable preferred stock at a per share price of $100 plus all unpaid
accumulated dividends.
 
     Series B Convertible Preferred Stock -- Each share of Series B convertible
preferred stock is convertible, at the option of the holder, into a number of
common shares determined by dividing $100 by the conversion price as defined.
The conversion price at December 31, 1998 is $0.384475 per common share. Each
share of Series B convertible preferred stock shall automatically be converted
into common shares, at the then effective conversion price, in the event of a
public offering. Series B convertible preferred stock carries full voting rights
and powers, with the exception of voting on the redemption of Series A
redeemable preferred stock. Each holder of Series B convertible preferred stock
is entitled to 164.7 votes per share held. The Company has reserved 3,641,328
shares of common stock for issuance upon conversion of Series B preferred stock.
 
     The Company is prohibited from repurchasing any common stock (other than
the shares originally issued to employees of the Company which the Company has
the right to
 
                                      F-11
   81
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 5.  CAPITAL STOCK (CONTINUED)
repurchase at the original issuance price or the fair market value, under
certain circumstances) prior to redeeming all the Series A preferred stock and
paying all accumulated dividends. Holders of the Series A preferred stock have
no voting rights or powers except in certain circumstances as defined in the
Company's articles of incorporation.
 
     Preferred stock, undesignated -- The Board of Directors has the authority,
without action by the stockholders, to designate and issue any authorized but
unissued shares of preferred stock in one or more series and to designate the
rights, preferences and privileges of each such series.
 
NOTE 6.  OPERATING LEASE
 
     The Company leases its facilities under the terms of an operating lease
agreement that expires in December 2007. The agreement calls for initial monthly
lease payments of approximately $48,000 plus the payment of insurance, property
tax and normal maintenance. The Company has the option to purchase these
facilities for $5,578,000 in February 2000.
 
     The approximate future minimum annual lease payments as of December 31,
1998 are as follows: 1999 $575,000; 2000 $605,000; 2001 $634,000; 2002 $634,000;
2003 $699,000; thereafter $2,976,000 (total $6,123,000).
 
     Rent expense for the years ended December 31, 1996, 1997 and 1998 was
$557,000, $580,000 and $697,000, respectively.
 
NOTE 7.  INCOME TAXES
 
     The income tax provision for the years ended December 31, 1996, 1997 and
1998 consists of the following:
 


                                                1996        1997         1998
                                              --------    --------    ----------
                                                             
Federal
  Current.................................    $590,000    $623,000    $1,820,000
  Deferred................................     (37,000)    (13,000)     (315,000)
                                              --------    --------    ----------
                                               553,000     610,000     1,505,000
                                              --------    --------    ----------
State
  Current.................................     170,000     197,000       332,000
  Deferred................................      (5,000)     (4,000)      (62,000)
                                              --------    --------    ----------
                                               165,000     193,000       270,000
                                              --------    --------    ----------
     Total income tax provision...........    $718,000    $803,000    $1,775,000
                                              ========    ========    ==========

 
                                      F-12
   82
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 7.  INCOME TAXES (CONTINUED)
     A reconciliation of income tax expense recorded to the amount of income tax
expense that would result from applying the federal statutory rate to income
before income taxes for the years ended December 31, 1996, 1997 and 1998 is as
follows:
 


                                                    1996    1997    1998
                                                    ----    ----    ----
                                                           
Statutory federal income tax rate.................   35%     35%     35%
State taxes, net of federal benefit...............    6       6       6
Foreign sales corporation benefit.................   (1)     (1)     (1)
Benefit of income taxed at lower rates............   (1)     (1)     (1)
Other.............................................   (2)      1       1
                                                     --      --      --
     Effective tax rate...........................   37%     40%     40%
                                                     ==      ==      ==

 
     The major components of the Company's deferred tax assets and liabilities
as of December 31 are as follows:
 


                                                    1997        1998
                                                  --------    ---------
                                                        
Deferred tax assets
  Equipment and leasehold improvements..........  $228,000    $      --
  State taxes...................................    65,000       63,000
  Inventories...................................    19,000       58,000
  Accounts receivable reserves..................     8,000        8,000
  Other.........................................    (3,000)      (9,000)
                                                  --------    ---------
     Total deferred tax assets..................  $317,000    $ 120,000
                                                  ========    =========
Deferred tax liabilities
  Equipment and leasehold improvements..........  $     --    $(180,000)
                                                  ========    =========

 
     The deferred tax amounts mentioned above have been classified on the
accompanying balance sheets as of December 31 as follows:
 


                                                    1997        1998
                                                  --------    ---------
                                                        
Current assets..................................  $ 89,000    $ 120,000
Noncurrent assets...............................   228,000           --
Noncurrent liabilities..........................        --     (180,000)

 
NOTE 8.  FOREIGN SALES, MAJOR CUSTOMERS AND DEPENDENCE ON SUPPLIERS
 
Foreign sales:
 
     Net sales for the years ended December 31, 1996, 1997 and 1998 included
$1,255,000, $1,261,000 and $1,227,000, respectively, in sales to customers
located outside the United States (primarily Europe).
 
                                      F-13
   83
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 8.  FOREIGN SALES, MAJOR CUSTOMERS AND DEPENDENCE ON SUPPLIERS (CONTINUED)
Major customers:
 
     Net sales for the years ended December 31, 1996, 1997 and 1998 include
sales to the following customers:
 


                                     1996          1997          1998
                                  ----------    ----------    -----------
                                                     
Customer A......................  $1,387,000    $4,503,000    $12,276,000
Customer B......................   1,560,000             *              *

 
     Accounts receivable balance due from these customers as of December 31,
1996, 1997 and 1998 is as follows:
 


                                     1996          1997          1998
                                  ----------    ----------    -----------
                                                     
Customer A......................  $  224,000    $1,169,000    $   889,000
Customer B......................          --             *              *

 
- -------------------------
* Net sales to this customer are less than 10% of the total net sales for 1997
  and 1998.
 
Dependence on Roche Diagnostic Systems, Inc.:
 
     The Company is highly dependent on its arrangement with Roche Diagnostic
Systems, Inc. (Roche) (Customer A above) for the distribution and marketing of
three of its principal products, which accounted for 17%, 42% and 65% of the
Company's net sales during the years ended December 31, 1996, 1997 and 1998,
respectively. Two of these three products were jointly developed by the Company
in collaboration with Roche. The Company's agreements with Roche, which expire
in 2002 and 2003 by their terms, provide that the Company has exclusive
manufacturing rights to the products. These agreements do not require Roche to
purchase any minimum amounts of product, and the Company does not have the
ability to sell or market these products directly. Roche holds all intellectual
property and other ownership rights to these products, and has no obligation to
renew or extend the Company's manufacturing rights upon expiration of the
Company's agreements with Roche.
 
Dependence on suppliers:
 
     The Company currently relies on several third party suppliers for the
manufacture of certain key components used in its products. In particular, the
Company purchases all of its requirements for the nitrocellulose membranes used
in the TesTcup and TesTstick products from a single supplier. Under the Roche
agreement, Roche provides all of the Company's requirements for certain liquid
reagents in the TesTcup and TesTstick products. Such components are custom made
biomaterials manufactured specifically for the Company's products. The Company
does not have any long-term supply agreement with either of these suppliers or
an alternate supplier for these components. In addition, the Company also has
additional single source suppliers for other components used in the manufacture
of certain products.
 
                                      F-14
   84
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 9.  STOCK OPTION PLANS
 
     During 1998 the Company adopted the 1997 Stock Option Plan. The Company has
reserved 1,329,780 shares of common stock for issuance under the 1997 Stock
Incentive Plan, the Stock Option Plan for Employees of ANSYS, Inc. (1990) and
certain officer and employee nonqualified stock options (the Plans). The options
vest immediately or over a three- to five-year period.
 
     The 1997 Plan is divided into two separate components; the Option Grant
Program and the Stock Issuance Program. Under the Option Grant Program, eligible
individuals (including officers, non-employee board members and consultants) may
be granted options to purchase shares of common stock at an exercise price not
less than 100% of their fair market value on the grant date as determined by the
plan administrator. Under the Stock Issuance Program, these individuals may be
issued shares of common stock directly. The individual may purchase the shares,
at a price not less than 100% of their fair market value as determined by the
plan administrator at the time of issuance; however, the purchase price per
share issued to a 10% stockholder may not be less than 110% of the fair market
value of the underlying common stock. Shares may also be granted as a bonus tied
to the performance of services. At December 31, 1998, there were 388,800
remaining options available under the 1997 Plan and no remaining options
available under the 1990 Plan.
 
     A summary of the status of the Plans and changes during the years ended
December 31, 1996, 1997 and 1998 is as follows:
 


                                1996                  1997                   1998
                         -------------------   -------------------   --------------------
                                   WEIGHTED              WEIGHTED               WEIGHTED
                                    AVERAGE               AVERAGE               AVERAGE
                                   EXERCISE              EXERCISE               EXERCISE
     FIXED OPTIONS       SHARES      PRICE     SHARES      PRICE     SHARES      PRICE
     -------------       -------   ---------   -------   ---------   -------   ----------
                                                             
Outstanding at
  beginning of
  period...............  483,180     $0.43     723,780     $0.64     777,780     $0.74
  Granted..............  244,800      1.05      54,000      2.13     211,200      3.97
  Exercised............   (4,080)     0.29          --        --     (18,400)     1.05
  Forfeited............     (120)     0.29          --        --     (29,600)     1.05
                         -------     -----     -------     -----     -------     -----
Outstanding at end of
  period...............  723,780     $0.64     777,780     $0.74     940,980     $1.45
                         =======     =====     =======     =====     =======     =====
Exercisable at end of
  period...............  332,969     $0.38     486,186     $0.51     688,920     $0.94
                         =======     =====     =======     =====     =======     =====
Remaining options
  available under the
  Plans................   75,744                21,744               388,800
                         =======               =======               =======
Weighted average
  minimum value per
  option granted during
  the period:
  At market price......  244,800     $0.68          --     $  --          --     $  --
                         =======     =====     =======     =====     =======     =====
  Below market price...       --     $  --      54,000     $1.29     211,200     $2.22
                         =======     =====     =======     =====     =======     =====

 
                                      F-15
   85
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 9.  STOCK OPTION PLANS (CONTINUED)
     A further summary of options outstanding at December 31, 1998, is as
follows:
 


                             WEIGHTED AVERAGE
  EXERCISE       NUMBER         REMAINING         OPTIONS
   PRICE       OUTSTANDING   CONTRACTUAL LIFE   EXERCISABLE
  --------     -----------   ----------------   -----------
                                       
   $0.29         318,780        3.32 years        318,780
    0.52          40,200        2.10 years         40,200
    0.75         120,000        6.50 years        120,000
    1.04          36,000        7.20 years         17,600
    1.07         160,800        7.91 years        107,202
    2.13          54,000        8.96 years         18,003
    3.83         175,200        9.32 years         49,135
    4.64          36,000        9.83 years         18,000
                 -------                          -------
                 940,980                          688,920
                 =======                          =======

 
     The Company applies APB Opinion No. 25, Accounting for Stock Issued to
Employees, and related Interpretations to account for the stock options issued
to employees and directors. Had compensation cost for the stock option plans
been determined based on the fair value at the date consistent with the method
of FASB Statement No. 123, Accounting for Stock-Based Compensation, the
Company's net income would have been the pro forma amounts indicated below:
 


                                      1996          1997          1998
                                   ----------    ----------    ----------
                                                      
Net income:
  As reported....................  $1,201,000    $1,206,000    $2,691,000
  Pro forma......................   1,178,000     1,153,000     2,451,000
Basic earnings per share:
  As reported....................        0.46          0.54          1.33
  Pro forma......................        0.45          0.51          1.20
Diluted earnings per share:
  As reported....................        0.19          0.20          0.45
  Pro forma......................        0.19          0.19          0.41

 
     The minimum value of options granted under the Company's Stock Option Plan
was estimated on the date of grant with the following assumptions: no dividend
yield, risk-free interest 6.4% to 6.5% in 1996, 6.6% in 1997 and 6.3% 1998, and
expected lives of ten years. The effects of applying SFAS No. 123 are not
indicative of future amounts since, among other reasons, the requirements of the
Statement have been applied only to options granted after December 1994.
 
     The 54,000 stock options granted by the Company in 1997 and the 211,200
stock options granted by the Company in 1998 were granted at an exercise price
that was less than the fair value of common stock per share. The Company
recorded related compensation expense during the years ended December 31, 1997
and 1998 of $2,000 and $108,000, respectively, based on an estimated fair value
per share of $2.98 for 54,000 shares $4.74 for 175,200 shares and $7.38 for
36,000 shares.
 
                                      F-16
   86
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 9.  STOCK OPTION PLANS (CONTINUED)
     In January 1999, the Company issued an additional 56,400 stock options with
an option price of $4.97 per share to employees of the Company.
 
NOTE 10.  DILUTED EARNINGS PER SHARE
 
     Diluted earnings per share is computed as follows:
 


                                                  YEARS ENDED DECEMBER 31,
                                           --------------------------------------
                                              1996          1997          1998
                                           ----------    ----------    ----------
                                                              
Income available to common
  stockholders...........................  $1,021,000    $1,026,000    $2,511,000
Plus impact of assumed conversion of
  Series B preferred stock...............     140,000       140,000       140,000
                                           ----------    ----------    ----------
Income available to common stockholders
  plus assumed conversion................  $1,161,000    $1,166,000    $2,651,000
                                           ==========    ==========    ==========
Weighted average shares outstanding......   2,230,408     1,900,951     1,890,204
Plus incremental shares from Series B
  preferred stock conversion.............   3,641,328     3,641,328     3,641,328
Stock options............................     185,282       321,238       410,002
                                           ----------    ----------    ----------
Diluted weighted average shares
  outstanding............................   6,057,018     5,863,517     5,941,534
                                           ==========    ==========    ==========

 
NOTE 11.  PRO FORMA INFORMATION
 
     The Company plans to redeem the Series A preferred stock, convert the
Series B preferred stock into common stock and pay the cumulative dividends on
the preferred stock in connection with a planned public stock offering. The
objective of the pro forma financial information included in these financial
statements is to show what the significant effects might have been on the
historical stockholders' equity and earnings per share.
 
Pro forma balance sheet at December 31, 1998:
 
     The following pro forma balance sheet adjustments have been made assuming
the following transactions occurred as of December 31, 1998:
 
     - Series A preferred stock has been redeemed for $400,000 in cash.
 
     - Series B preferred stock has been converted into 3,641,328 shares of
       common stock.
 
     - An estimated $1,860,000 in cumulative dividends on the Series A and B
       preferred stock is paid in cash.
 
Pro forma earnings per share:
 
     Pro forma basic earnings per share is computed as net income divided by the
pro forma weighted average number of common shares outstanding for the period.
Pro forma common shares outstanding for all periods presented in the computation
of pro forma basic earnings per share include (1) the number of shares of common
stock that the Series B
 
                                      F-17
   87
                     ANSYS DIAGNOSTICS, INC. AND SUBSIDIARY
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
NOTE 11.  PRO FORMA INFORMATION (CONTINUED)
preferred stock will be converted into upon the completion of the initial public
offering and (2) the number of equivalent common shares to be issued in the
initial public offering necessary to redeem the Series A preferred stock and pay
the cumulative dividends on the Series A and B preferred stock through the
estimated effective date of the initial public offering at the assumed public
offering price per share.
 
     Pro forma diluted earnings per share is computed as net income divided by
the pro forma weighted average number of common shares outstanding for the
period as computed above plus dilutive potential common shares that could occur
from common shares issuable through stock options.
 


                                                   YEARS ENDED DECEMBER 31,
                                              -----------------------------------
                                                1996         1997         1998
                                              ---------    ---------    ---------
                                                               
Basic:
  Weighted average shares outstanding.......  2,230,408    1,900,951    1,890,204
  Pro forma conversion of Series B preferred
     stock..................................  3,641,328    3,641,328    3,641,328
Pro forma common shares to be issued
  necessary to:
  Redeem Series A preferred stock...........     36,364       36,364       36,364
  Pay cumulative dividends on preferred
     stock..................................    169,091      169,091      169,091
                                              ---------    ---------    ---------
Pro forma weighted average shares
  outstanding...............................  6,077,191    5,747,734    5,736,987
                                              =========    =========    =========
Diluted:
  Pro forma weighted average shares
     outstanding............................  6,077,191    5,747,734    5,736,987
  Stock options.............................    185,282      321,238      410,002
                                              ---------    ---------    ---------
Pro forma diluted weighted average shares
  outstanding...............................  6,262,473    6,068,972    6,146,989
                                              =========    =========    =========

 
NOTE 12.  SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
 


                                                   YEARS ENDED DECEMBER 31,
                                              ----------------------------------
                                                1996        1997         1998
                                              --------    --------    ----------
                                                             
Cash paid for:
  Interest..................................  $     --    $ 16,000    $  148,000
                                              ========    ========    ==========
  Income taxes..............................  $618,000    $646,000    $2,002,000
                                              ========    ========    ==========

 
                                      F-18
   88
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
PROSPECTUS DATED             , 1999
 
                                   ANSYS LOGO
 
                                2,500,000 SHARES
 
                                  COMMON STOCK
 
Vector Securities International, Inc.                   Sutro & Co. Incorporated
 
- --------------------------------------------------------------------------------
 
                               TABLE OF CONTENTS
                              --------------------
 


                                              PAGE
                                              ----
                                           
Prospectus Summary...........................   3
Risk Factors.................................   7
Use of Proceeds..............................  20
Dividend Policy..............................  20
Capitalization...............................  21
Dilution.....................................  22
Selected Consolidated Financial Data.........  23
Management's Discussion and Analysis of
  Financial Condition and Results
  of Operations..............................  24
Business.....................................  30
Management...................................  51
Principal Stockholders.......................  60
Description of Capital Stock.................  61
Shares Eligible for Future Sale..............  64
Underwriting.................................  66
Legal Matters................................  68
Experts......................................  68
Additional Information.......................  68
Index to Consolidated Financial Statements... F-1

 
WE HAVE NOT AUTHORIZED ANY DEALER, SALESPERSON OR OTHER PERSON TO PROVIDE ANY
INFORMATION OR TO REPRESENT ANYTHING NOT CONTAINED IN THIS PROSPECTUS. YOU MUST
NOT RELY ON ANY UNAUTHORIZED INFORMATION OR REPRESENTATIONS. THIS PROSPECTUS IS
NOT AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY THESE SHARES OF COMMON
STOCK IN JURISDICTIONS WHERE IT IS UNLAWFUL TO DO SO. THE INFORMATION CONTAINED
IN THIS PROSPECTUS IS ACCURATE ONLY AS OF THE DATE OF THIS PROSPECTUS.
                              -------------------
 
UNTIL             , 1999 (25 DAYS AFTER DATE OF THIS PROSPECTUS), ALL DEALERS
THAT EFFECT TRANSACTIONS IN THESE SHARES OF COMMON STOCK, WHETHER OR NOT
PARTICIPATING IN THIS OFFERING, MAY BE REQUIRED TO DELIVER A PROSPECTUS. THIS IS
IN ADDITION TO THE DEALERS' OBLIGATION TO DELIVER A PROSPECTUS WHEN ACTING AS
UNDERWRITERS AND WITH RESPECT TO THEIR UNSOLD ALLOTMENTS OR SUBSCRIPTIONS.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
   89
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
     The following table sets forth the costs and expenses, other than
underwriting discounts and commissions, payable in connection with the sale and
distribution of the securities being registered. All amounts are estimated
except the Securities and Exchange Commission and NASD registration fees. All of
the expenses below will be paid by ANSYS.
 


                            ITEM
                            ----
                                                           
Registration fee............................................  $  9,591
NASD filing fee.............................................     3,950
Nasdaq National Market listing fee..........................    70,000
Blue sky fees and expenses..................................    10,000
Printing and engraving expenses.............................   125,000
Legal fees and expenses.....................................   150,000
Accounting fees and expenses................................   100,000
Transfer Agent and Registrar fees...........................    30,000
Miscellaneous...............................................    51,459
                                                              --------
          Total.............................................  $550,000
                                                              ========

 
- -------------------------
* To be filed by amendment.
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
     Under Section 145 of the Delaware General Corporation Law, we can indemnify
our directors and officers against liabilities they may incur in such
capacities, including liabilities under the Securities Act of 1933, as amended
(the "Securities Act"). Our bylaws provide that we will indemnify our directors
and officers to the fullest extent permitted by law and require us to advance
litigation expenses upon our receipt of an undertaking by the director or
officer to repay such advances if it is ultimately determined that the director
or officer is not entitled to indemnification. Our bylaws further provide that
rights conferred under such bylaws do not exclude any other right such persons
may have or acquire under any bylaw, agreement, vote of stockholders or
disinterested directors or otherwise.
 
     Our certificate of incorporation provides that, pursuant to Delaware law,
our directors shall not be liable for monetary damages for breach of the
directors' fiduciary duty of care to ANSYS and our stockholders. This provision
in the certificate of incorporation does not eliminate the duty of care, and in
appropriate circumstances equitable remedies such as injunctive or other forms
of non-monetary relief will remain available under Delaware law. In addition,
each director will continue to be subject to liability for breach of the
director's duty of loyalty to the Company or our stockholders, for acts or
omissions not in good faith or involving intentional misconduct or knowing
violations of law, for actions leading to improper personal benefit to the
director, and for payment of dividends or approval of stock repurchases or
redemption's that are unlawful under Delaware law. The provision also does not
affect a director's responsibilities under any other law, such as the federal
securities laws or state or federal environmental laws.
 
     In addition, our certificate of incorporation (Exhibit 3.1 to this
registration statement) provides that we shall indemnify our directors and
officers if such persons acted: (1) in good
 
                                      II-1
   90
 
faith; (2) in a manner reasonably believed to be in or not opposed to our best
interests; and (3) with respect to any criminal action or proceeding, with
reasonable cause to believe such conduct was lawful. The certificate of
incorporation also provides that, pursuant to Delaware law, our directors shall
not be liable for monetary damages for breach of the directors' fiduciary duty
of care to our company and our stockholders. This provision in the certificate
of incorporation does not eliminate the duty of care, and in appropriate
circumstances equitable remedies such as injunctive or other forms of
non-monetary relief will remain available under Delaware law. In addition, each
director will continue to be subject to liability for breach of the director's
duty of loyalty to ANSYS for acts or omissions not in good faith or involving
intentional misconduct, for knowing violations of law, for actions leading to
improper personal benefit to the director, and for payment of dividends or
approval of stock repurchases or redemption's that are unlawful under Delaware
law. The provision also does not affect a director's responsibilities under any
other law, such as the federal securities laws or state or federal environmental
laws. The certificate of incorporation further provides that we are authorized
to indemnify our directors and officers to the fullest extent permitted by law
through the bylaws, agreement, vote of stockholders or disinterested directors,
or otherwise. We intend to obtain directors' and officers' liability insurance
in connection with this offering.
 
     In addition, we have has entered or, concurrently with this offering, will
enter, into agreements to indemnify our directors and certain of our officers in
addition to the indemnification provided for in the certificate of incorporation
and bylaws. These agreements will, among other things, indemnify our directors
and certain of our officers for certain expenses (including attorneys fees),
judgments, fines and settlement amounts incurred by such person in any action or
proceeding, including any action by or in our right, on account of services by
that person as a director or officer of ANSYS or as a director or officer of any
subsidiary of ANSYS, or as a director or officer of any other company or
enterprise that the person provides services to at the request of ANSYS.
 
     The Underwriting Agreement (Exhibit 1.1 hereto) provides for
indemnification by the underwriters of ANSYS and its officers and directors, and
by ANSYS of the underwriters, for certain liabilities arising under the
Securities Act or otherwise.
 
                                      II-2
   91
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES
 
     The following is a summary of transactions by ANSYS since January 1, 1996
involving sales of our securities that were not registered under the Securities
Act of 1933, as amended.
 
     Since January 1, 1996, the Registrant has issued stock options under its
1990 Plan and 1997 Plan to certain eligible officers, directors and employees to
purchase an aggregate of 566,400 shares of Common Stock (after giving effect to
the 1.2 for 1 stock split). In addition, on December 12, 1996 the Registrant
issued options to purchase 90,000 shares of Common Stock to Stephen K.
Schultheis, then its President and Chief Executive Officer, which options were
not granted pursuant to any plan.
 
     None of the optionees paid any cash consideration for such options. Such
options did not involve a "sale" of securities; and, accordingly, registration
was not required. The following table sets forth the grant date, number of
options, current exercise price and class of optionees for all of such options.
All data gives effect to the 1.2 for 1 stock split.
 


            GRANT DATE               NO. OF OPTIONS   EXERCISE PRICE   CLASS OF OPTIONEES
            ----------               --------------   --------------   ------------------
                                                              
01/01/96 to 05/31/96                     72,000           $1.04          Employee
03/01/96 to 12/31/96                    172,800           $1.07          Employee
12/18/97                                 54,000           $2.13          Employee
04/08/98                                108,000           $3.83          Employee
07/01/98                                 67,300           $3.83          Officer
10/16/98                                 18,000           $4.64          Director
11/16/98                                 18,000           $4.64          Director
01/22/99                                 56,400           $4.97          Employee

 
     In addition, in April 1998 the Registrant issued 18,400 shares (after
giving effect to the 1.2 for 1 stock split) to a former employee upon exercise
of his vested options.
 
     The sale and issuance of securities in the above transactions were deemed
to be exempt from registration under the Securities Act by virtue of Section
4(2) or Rule 701 thereof, or Regulation D, as transactions by an issuer not
involving a public offering. Appropriate legends are affixed to the stock
certificates issued in such transactions. Similar legends were imposed in
connection with any subsequent sales of any such securities. All recipients
either received adequate information about the Company or had access, through
employment or other relationships, to such information.
 
                                      II-3
   92
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 
     The following Exhibits are attached hereto and incorporated herein by
reference.
 

       
     1.1  *Form of Underwriting Agreement
     3.1  *Certificate of Incorporation of ANSYS to be filed with the
          Delaware Secretary of State in March 1999
     3.2  *Bylaws of ANSYS
     4.1  *Specimen certificate representing shares of common stock of
          the Company
     5.1  *Form of Opinion of Brobeck Phleger & Harrison LLP
    10.1  Form of Indemnification Agreement
    10.2  Stock Option Plan for Employees of Toxi-Lab, Inc., together
          with form of Stock Option Agreement (and related Notice of
          Grant of Option), Stock Purchase Agreement and Stock
          Issuance Agreement
    10.3  1997 Stock Incentive Plan, together with form of Stock
          Option Agreement (and related Notice of Grant of Option),
          Stock Purchase Agreement and Stock Issuance Agreement
    10.4  Commercial Agreement dated as of April 1, 1993 by and
          between Roche Diagnostic System, Inc. and ANSYS
    10.5  Amendment to Commercial Agreement between Roche Diagnostic
          Systems, Inc. and ANSYS dated May 1, 1998
    10.6  Development and Manufacturing Agreement dated as of
          September 1, 1996 by and between Roche Diagnostic Systems,
          Inc. and ANSYS
    10.7  First Amendment to Development and Manufacturing Agreement
    10.8  Lease Agreement
    10.9  Distributorship Agreement for Ansys, Inc.
    10.10 Distributorship Agreement for Ansys Diagnostics, Inc.
    10.11 Registration Rights Agreement
    10.12 Management Subscription Agreement
    21.1  Subsidiaries
    23.1  Consent of McGladrey & Pullen, LLP, Independent Auditors
    23.2  Consent of Brobeck Phleger & Harrison LLP (contained in
          Exhibit 5.1)
    24.1  Power of Attorney (contained on signature page on page II-4)
    27.1  Financial Data Schedule

 
- -------------------------
* To be filed by amendment.
 
(b) FINANCIAL STATEMENT SCHEDULES
 
     Schedules have been omitted because the information required to be set
forth therein is not applicable or is shown in the financial statements or notes
thereto.
 
ITEM 17. UNDERTAKINGS
 
     The Registrant hereby undertakes to provide to the Underwriters at the
closing specified in the Underwriting Agreements certificates in such
denominations and registered in such names as required by the Underwriters to
permit prompt delivery to each purchaser.
 
     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
Company pursuant to the foregoing provisions, or otherwise, the Company has been
advised that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy as expressed in the Securities Act and
is, therefore, unenforceable. In the event that a claim for
 
                                      II-4
   93
 
indemnification against such liabilities (other than the payment by the Company
of expenses incurred or paid by a director, officer or controlling person of the
Company in the successful defense of any action, suit, or proceeding) is
asserted by such director, officer or controlling person in connection with the
securities being registered, the Company will, unless in the opinion of its
counsel the matter has been settled by controlling precedent, submit to a court
of appropriate jurisdiction the question whether such indemnification by it is
against public policy as expressed in the Securities Act and will be governed by
the final adjudication of such issue.
 
     The undersigned Registrant hereby undertakes that:
 
          (1) For purposes of determining any liability under the Securities Act
     of 1933, the information omitted from the form of prospectus as filed as
     part of this Registration Statement in reliance upon Rule 430A and
     contained in a form of prospectus filed by the Company pursuant to Rule
     424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to be
     part of this Registration Statement as of the time it was declared
     effective.
 
          (2) For the purpose of determining any liability under the Securities
     Act of 1933, each post-effective amendment that contains a form of
     prospectus shall be deemed to be a new registration statement relating to
     the securities offered therein, and this offering of such securities at
     that time shall be deemed to be the initial bona fide offering thereof.
 
                                      II-5
   94
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Act of 1933, the Company has
duly caused this Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of Lake Forest, State of
California, on the 19th day of February, 1999.
 
                                          ANSYS DIAGNOSTICS, INC.
 
                                          By:   /s/ STEPHEN K. SCHULTHEIS
                                             -----------------------------------
                                                   Stephen K. Schultheis,
                                              Chairman of the Board, President
                                                             and
                                                   Chief Executive Officer
 
                               POWER OF ATTORNEY
 
     KNOW ALL MEN BY THESE PRESENTS, the undersigned hereby constitute and
appoint Stephen K. Schultheis and Suzanne M. David , and each of them, his true
and lawful attorney-in-fact and agent, each with full power of substitution and
resubstitution, for him and in his name, place and stead, in any and all
capacities, to sign any and all amendments (including post-effective amendments)
to this Registration Statement, or any related registration statement filed
pursuant to Rule 462(b) under the Securities Act of 1933, and to file the same,
with exhibits thereto, and other documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, and each of them, full power and authority to do and perform each and
every act and thing requisite or necessary to be done in connection therewith,
as fully to all intents and purposes as he might or could do in person, hereby
ratifying and confirming all that each of said attorneys-in-fact and agents, or
his substitute or substitutes, may lawfully do or cause to be done by virtue
hereof.
 
     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement on Form S-1 has been signed by the following persons in
the capacities and on the dates indicated:
 


                SIGNATURE                              TITLE                   DATE
                ---------                              -----                   ----
                                                                   
        /s/ STEPHEN K. SCHULTHEIS           Chairman of the Board,       February 12, 1999
- ------------------------------------------  President and Chief
          Stephen K. Schultheis             Executive Officer
                                            (principal executive
                                            officer)
 
           /s/ SUZANNE M. DAVID             Chief Financial Officer      February 16, 1999
- ------------------------------------------  (principal financial and
             Suzanne M. David               accounting officer)
 
            /s/ RONALD J. HALL              Director                     February 12, 1999
- ------------------------------------------
              Ronald J. Hall

 
                                      II-6
   95
 


                SIGNATURE                              TITLE                   DATE
                ---------                              -----                   ----
                                                                   
           /s/ GEORGE D. HOLMES             Director                     February 12, 1999
- ------------------------------------------
             George D. Holmes
 
            /s/ JOHN M. MORRIS              Director                     February 12, 1999
- ------------------------------------------
              John M. Morris
 
     /s/ C. MICHAEL O'DONNELL, PH.D.        Director                     February 12, 1999
- ------------------------------------------
       C. Michael O'Donnell, Ph.D.
 
         /s/ WILLIAM C. SHEPHERD            Director                     February 16, 1999
- ------------------------------------------
           William C. Shepherd

 
                                      II-7
   96
 
                                 EXHIBIT INDEX
 


EXHIBIT
NUMBER                           DESCRIPTION                           PAGE
- -------                          -----------                           ----
                                                                 
 1.1     *Form of Underwriting Agreement.............................
 3.1     *Certificate of Incorporation of ANSYS to be filed with the
         Delaware Secretary of State in March 1999...................
 3.2     *Bylaws of ANSYS............................................
 4.1     *Specimen certificate representing shares of common stock of
         the Company.................................................
 5.1     *Form of Opinion of Brobeck Phleger & Harrison LLP..........
10.1     *Form of Indemnification Agreement..........................
10.2     Stock Option Plan for Employees of Toxi-Lab, Inc., together
         with form of Stock Option Agreement and amendments..........
10.3     1997 Stock Incentive Plan, together with form of Stock
         Option Agreement (and related Notice of Grant of Option),
         Stock Purchase Agreement and Stock Issuance Agreement.......
10.4     *Commercial Agreement dated as of April 1, 1993 by and
         between Roche Diagnostic System, Inc. and ANSYS.............
10.5     *Amendment to Commercial Agreement between Roche Diagnostic
         Systems, Inc. and ANSYS dated May 1, 1998...................
10.6     *Development and Manufacturing Agreement dated as of
         September 1, 1996 by and between Roche Diagnostic Systems,
         Inc. and ANSYS..............................................
10.7     *First Amendment to Development and Manufacturing
         Agreement...................................................
10.8     Lease Agreement.............................................
10.9     Form of Distributorship Agreement (Domestic)................
10.10    Form of Distributorship Agreement (International)...........
10.11    Registration Rights Agreement...............................
10.12    Form of Management Subscription Agreement...................
10.13    *$2,000,000 Promissory Note Change in Terms Agreement dated
         June 1, 1998 by and between Southern California Bank and
         ANSYS.......................................................
10.14    *$1,000,000 Promissory Note Change in Terms Agreement dated
         May 28, 1998 by and between Southern California Bank and
         ANSYS.......................................................
21.1     Subsidiaries................................................
23.1     Consent of McGladrey & Pullen, LLP, Independent Auditors....
23.2     Consent of Brobeck Phleger & Harrison LLP (contained in
         Exhibit 5.1)................................................
24.1     Power of Attorney (contained on signature page on page
         II-4).......................................................
27.1     Financial Data Schedule.....................................

 
- -------------------------
* To be filed by amendment.