CHOLESTECH CORPORATION
424A, 1996-05-29
LABORATORY ANALYTICAL INSTRUMENTS
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<PAGE>

Filed Pursuant to Rule 424(a)
Registration No. 33-03367

<PAGE>
INFORMATION   CONTAINED  HEREIN  IS  SUBJECT   TO  COMPLETION  OR  AMENDMENT.  A
REGISTRATION STATEMENT  RELATING TO  THESE SECURITIES  HAS BEEN  FILED WITH  THE
SECURITIES  AND EXCHANGE  COMMISSION. THESE SECURITIES  MAY NOT BE  SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR  TO THE TIME THE REGISTRATION STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE AN  OFFER  TO  SELL  OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN  ANY STATE IN WHICH SUCH OFFER,  SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
<PAGE>
                   PRELIMINARY PROSPECTUS, DATED MAY 24, 1996
PROSPECTUS
 
                                3,000,000 SHARES
 
                                     [LOGO]
 
                                  COMMON STOCK
 
    All of the 3,000,000 shares of Common Stock offered hereby are being sold by
Cholestech Corporation  ("Cholestech" or  the "Company").  The Company's  Common
Stock  is quoted on the  Nasdaq National Market under  the symbol "CTEC." On May
23, 1996, the last reported sale price for the Common Stock was $7.13 per share.
See "Price Range of Common Stock."
 
    THE COMMON STOCK OFFERED  HEREBY INVOLVES A HIGH  DEGREE OF RISK. SEE  "RISK
FACTORS," BEGINNING ON PAGE 5.
 
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
    EXCHANGE  COMMISSION OR ANY  STATE SECURITIES COMMISSION  NOR HAS THE
       SECURITIES AND  EXCHANGE COMMISSION  OR ANY  STATE  SECURITIES
           COMMISSION  PASSED  UPON THE  ACCURACY OR  ADEQUACY OF
               THIS PROSPECTUS. ANY REPRESENTATION    TO  THE
                        CONTRARY IS A CRIMINAL OFFENSE.
 
<TABLE>
<CAPTION>
                                                             UNDERWRITING
                                                             DISCOUNTS AND     PROCEEDS TO
                                           PRICE TO PUBLIC  COMMISSIONS(1)     COMPANY(2)
<S>                                        <C>              <C>              <C>
  Per Share..............................         $                $                $
  Total(3)...............................         $                $                $
</TABLE>
 
(1)  The  Company  has  agreed to  indemnify  the  Underwriters  against certain
    liabilities, including  liabilities under  the Securities  Act of  1933,  as
    amended. See "Underwriting."
 
(2)  Before deducting expenses of the Offering payable by the Company, estimated
    at $500,000.
 
(3) The Company has granted the Underwriters  a 30-day option to purchase up  to
    450,000  additional shares of Common Stock  on the same terms and conditions
    set forth above, solely to cover over-allotments, if any. If such option  is
    exercised  in full,  the total Price  to Public,  Underwriting Discounts and
    Commissions and Proceeds to Company will be  $      ,  $      and  $       ,
    respectively. See "Underwriting."
 
                            ------------------------
 
    The  shares of Common Stock offered by the Underwriters are subject to prior
sale,  receipt  and  acceptance  by  them  and  subject  to  the  right  of  the
Underwriters  to  reject  any  order  in whole  or  in  part  and  certain other
conditions. It is  expected that delivery  of such  shares will be  made at  the
offices  of the agent of Vector Securities International, Inc., in New York, New
York, on or about             , 1996.
 
                             ---------------------
 
Vector Securities International, Inc.       Principal Financial Securities, Inc.
 
          , 1996
<PAGE>
[LOGO]
 
                             [PICTURE OF PRODUCTS]
 
                             ---------------------
 
               SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS
 
    CERTAIN STATEMENTS UNDER THE CAPTIONS "PROSPECTUS SUMMARY," "RISK  FACTORS,"
"USE  OF PROCEEDS," "MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS  OF OPERATIONS"  AND  "BUSINESS" AND  ELSEWHERE IN  THIS  PROSPECTUS
CONSTITUTE  "FORWARD-LOOKING  STATEMENTS"  WITHIN  THE  MEANING  OF  THE PRIVATE
SECURITIES  LITIGATION   REFORM   ACT  OF   1995   (THE  "REFORM   ACT").   SUCH
FORWARD-LOOKING  STATEMENTS INVOLVE  KNOWN AND UNKNOWN  RISKS, UNCERTAINTIES AND
OTHER FACTORS WHICH MAY CAUSE THE ACTUAL RESULTS, PERFORMANCE OR ACHIEVEMENTS OF
THE COMPANY, OR  INDUSTRY RESULTS, TO  BE MATERIALLY DIFFERENT  FROM ANY  FUTURE
RESULTS,   PERFORMANCE   OR   ACHIEVEMENTS   EXPRESSED   OR   IMPLIED   BY  SUCH
FORWARD-LOOKING STATEMENTS.  SUCH  FACTORS  INCLUDE,  AMONG  OTHER  THINGS,  THE
FOLLOWING: THE COMPANY'S HISTORY OF LOSSES AND UNCERTAINTY OF PROFITABILITY; THE
UNCERTAINTY  OF MARKET ACCEPTANCE OF THE  L-D-X SYSTEM; THE COMPANY'S DEPENDENCE
ON DEVELOPMENT AND INTRODUCTION  OF NEW PRODUCTS;  THE COMPANY'S LIMITED  SALES,
MARKETING  AND DISTRIBUTION EXPERIENCE AND DEPENDENCE ON DISTRIBUTORS; THE RISKS
ASSOCIATED  WITH  CASSETTE  MANUFACTURING;  THE  COMPANY'S  HIGHLY   COMPETITIVE
INDUSTRY  AND  RAPID TECHNOLOGICAL  CHANGE  WITHIN THE  COMPANY'S  INDUSTRY; THE
UNCERTAINTY OF  PATENT AND  PROPRIETARY TECHNOLOGY  PROTECTION AND  RELIANCE  ON
TECHNOLOGY  LICENSED FROM THIRD PARTIES; CHANGES  IN, OR FAILURE TO COMPLY WITH,
GOVERNMENT  REGULATION;  THE  UNCERTAINTY  OF  THIRD  PARTY  REIMBURSEMENT   FOR
PROCEDURES PERFORMED USING THE COMPANY'S PRODUCTS; THE POTENTIAL FLUCTUATIONS IN
THE  COMPANY'S  QUARTERLY RESULTS;  THE  COMPANY'S DEPENDENCE  ON  RETENTION AND
ATTRACTION OF KEY EMPLOYEES; GENERAL ECONOMIC AND BUSINESS CONDITIONS; AND OTHER
FACTORS REFERENCED IN THIS PROSPECTUS. SEE "RISK FACTORS."
 
    IN CONNECTION WITH THIS OFFERING, THE UNDERWRITERS MAY OVER-ALLOT OR  EFFECT
TRANSACTIONS WHICH STABILIZE OR MAINTAIN THE MARKET PRICE OF THE COMMON STOCK OF
THE  COMPANY AT  A LEVEL ABOVE  THAT WHICH  MIGHT OTHERWISE PREVAIL  IN THE OPEN
MARKET. SUCH STABILIZING, IF COMMENCED, MAY BE DISCONTINUED AT ANY TIME.
 
    IN CONNECTION WITH  THIS OFFERING,  CERTAIN UNDERWRITERS  AND SELLING  GROUP
MEMBERS  (IF ANY)  OR THEIR RESPECTIVE  AFFILIATES MAY ENGAGE  IN PASSIVE MARKET
MAKING TRANSACTIONS  IN  THE COMMON  STOCK  ON  THE NASDAQ  NATIONAL  MARKET  IN
ACCORDANCE  WITH  RULE 10B-6A  UNDER THE  SECURITIES EXCHANGE  ACT OF  1934. SEE
"UNDERWRITING."
<PAGE>
                               PROSPECTUS SUMMARY
 
    THE  FOLLOWING SUMMARY  IS QUALIFIED  IN ITS  ENTIRETY BY  THE MORE DETAILED
INFORMATION AND THE FINANCIAL STATEMENTS  AND NOTES THERETO APPEARING  ELSEWHERE
IN  THIS  PROSPECTUS,  INCLUDING  INFORMATION UNDER  "RISK  FACTORS."  EXCEPT AS
OTHERWISE  NOTED,  ALL  INFORMATION  IN  THIS  PROSPECTUS,  INCLUDING  FINANCIAL
INFORMATION,  SHARE AND PER SHARE DATA, ASSUMES NO EXERCISE OF THE UNDERWRITERS'
OVER-ALLOTMENT OPTION. SEE "UNDERWRITING." SPECIAL NOTE: CERTAIN STATEMENTS  SET
FORTH  BELOW CONSTITUTE "FORWARD-LOOKING  STATEMENTS" WITHIN THE  MEANING OF THE
REFORM ACT. SEE "SPECIAL  NOTE REGARDING FORWARD-LOOKING  STATEMENTS" ON PAGE  2
FOR ADDITIONAL FACTORS RELATING TO SUCH STATEMENTS.
 
    Cholestech   Corporation   ("Cholestech"   or   the   "Company")   develops,
manufactures and  markets a  proprietary point  of care  diagnostic system  (the
"L-D-X  System") which measures specific analytes to detect various diseases and
disorders within five minutes  using a single drop  of whole blood. The  Company
currently  markets its L-D-X System and a series of lipid and glucose panels for
preventive screening and  monitoring applications.  In January  1996, the  L-D-X
System  and the Company's  total cholesterol, high  density lipoprotein ("HDL"),
triglycerides and glucose tests  were granted waived  status under the  Clinical
Laboratory  Improvement  Amendments  of  1988 ("CLIA"),  the  first  such waiver
granted under  CLIA's  newly-developed  ease  of  use,  accuracy  and  precision
guidelines. The CLIA waiver allows health care providers to use the L-D-X System
without  the additional  operating costs  and extensive  regulatory requirements
associated with CLIA compliance. The Company  believes that the L-D-X System  is
the  only multi-analyte diagnostic system to be classified as waived under CLIA.
The  Company  also  believes  that  the  L-D-X  System's  CLIA  waived   status,
technological  flexibility,  ease of  use,  accuracy and  low  maintenance costs
provide it  with competitive  advantages  over other  point of  care  diagnostic
systems.
 
    As  a  result of  the cost  and administrative  burden associated  with CLIA
compliance, the  L-D-X System  and its  lipid-focused test  menu were  initially
marketed  to health care providers performing high volume preventive risk factor
screening, including hospitals,  corporate wellness  programs, community  health
centers  and health promotion service providers. Immediate results are important
in this setting  because it allows  high risk individuals  to be identified  and
enrolled in appropriate intervention programs in the same visit. With its recent
CLIA  waived status,  the Company  has expanded  its marketing  and distribution
focus to also target the monitoring  market, in particular the physician  office
laboratory  ("POL") and pharmacy  segments. The Company's  access to this market
was limited prior  to the  CLIA waiver because  of the  cost and  administrative
burden  associated  with the  CLIA regulations.  The  Company intends  to target
initially the 54,000 POLs  in the United States.  The Company believes that  the
L-D-X  System  will  enable  health care  providers  in  the  monitoring market,
particularly POLs, to better control their medical costs by eliminating the need
for patient follow-up with test results and reducing the time before therapy can
be prescribed or modified, and to permit them to capture additional revenue from
conducting testing in their offices. In  order to effectively penetrate the  POL
market,  the  Company has  recently  entered into  a  non-exclusive distribution
agreement with Physician Sales  and Services, Inc.  ("PSS"), a national  medical
products distributor with more than 700 sales professionals who focus on the POL
market.
 
    The  L-D-X System consists of a portable analyzer and proprietary disposable
test cassettes. The test cassette is the focal point of the L-D-X System and the
key to  its flexibility.  The  Company has  incorporated  most of  the  critical
technological features of the system into the test cassette so that as new tests
are  developed, the existing L-D-X Analyzer can be utilized with simple software
upgrades. The Company  has recently demonstrated  the feasibility of  performing
immunoassay-based  tests on the L-D-X Analyzer. The Company believes that, if an
immunoassay cassette is successfully developed,  the L-D-X Analyzer will be  the
only  point of care  diagnostic system capable of  performing both dry chemistry
and immunoassay-based tests on a single instrument.
 
    The Company  intends to  leverage the  technological flexibility  of  L-D-X-
System  to capitalize on attractive markets that  can be served by point of care
diagnostic instruments.  The Company  is  developing additional  test  cassettes
which  will enable it  to provide a  more comprehensive line  of products to the
monitoring market.  These cassettes  include  tests for  uric acid,  blood  urea
nitrogen  and creatinine used  to measure kidney  function. The Company believes
that these tests, along with cholesterol and glucose, are among the most ordered
tests by physicians in the POL market. In May 1996, the Company entered into  an
agreement  with  Metra  Biosystems,  Inc.  ("Metra  Biosystems")  to  develop an
immunoassay test  cassette  to measure  bone  resorption,  a key  gauge  of  the
effectiveness  of osteoporosis treatment. The  Company has also demonstrated the
feasibility of measuring prostate specific  antigen ("PSA") for prostate  cancer
screening from whole blood using the Company's technology.
 
                                       3
<PAGE>
                                  THE OFFERING
 
<TABLE>
<S>                                                 <C>
Common Stock offered..............................  3,000,000 shares
Common Stock outstanding after the Offering.......  11,131,824 shares (1)
Use of proceeds...................................  For research and development, capital
                                                    expenditures, repayment of indebtedness, expansion
                                                    of sales and marketing capabilities, and other
                                                    working capital and general corporate purposes
Nasdaq National Market symbol.....................  CTEC
</TABLE>
 
                             SUMMARY FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                  YEAR ENDED MARCH 31,
                                                                  -----------------------------------------------------
                                                                    1992       1993       1994       1995       1996
                                                                  ---------  ---------  ---------  ---------  ---------
<S>                                                               <C>        <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
  Revenues......................................................  $   1,518  $   3,744  $   3,029  $   4,038  $   6,873
  Cost of products sold.........................................        565      4,908      4,972      3,933      4,505
                                                                  ---------  ---------  ---------  ---------  ---------
  Gross profit (loss)...........................................        953     (1,164)    (1,943)       105      2,368
                                                                  ---------  ---------  ---------  ---------  ---------
  Operating expenses:
    Research and development....................................      6,124      1,843      2,134        715        714
    Sales and marketing.........................................      1,446      2,171      2,909      2,694      3,168
    General and administrative..................................      2,373      3,133      2,288      1,983      1,376
                                                                  ---------  ---------  ---------  ---------  ---------
      Total operating expenses..................................      9,943      7,147      7,331      5,392      5,258
                                                                  ---------  ---------  ---------  ---------  ---------
  Loss from operations..........................................     (8,990)    (8,311)    (9,274)    (5,287)    (2,890)
  Interest income, net..........................................        100        246        364        243        144
                                                                  ---------  ---------  ---------  ---------  ---------
  Net loss......................................................  $  (8,890) $  (8,065) $  (8,910) $  (5,044) $  (2,746)
                                                                  ---------  ---------  ---------  ---------  ---------
                                                                  ---------  ---------  ---------  ---------  ---------
  Net loss per share (2)........................................  $  (13.38) $   (1.57) $   (1.14) $    (.63) $    (.34)
                                                                  ---------  ---------  ---------  ---------  ---------
                                                                  ---------  ---------  ---------  ---------  ---------
  Weighted average common shares (2)............................        664      5,122      7,791      7,954      8,042
                                                                  ---------  ---------  ---------  ---------  ---------
                                                                  ---------  ---------  ---------  ---------  ---------
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                              MARCH 31, 1996
                                                                                        --------------------------
                                                                                         ACTUAL    AS ADJUSTED (3)
                                                                                        ---------  ---------------
<S>                                                                                     <C>        <C>
BALANCE SHEET DATA:
  Cash, cash equivalents and restricted marketable securities.........................  $   4,111    $    21,956
  Working capital.....................................................................      4,442         23,036
  Total assets........................................................................      9,645         27,490
  Long-term obligations, net of current portion.......................................        810             11
  Accumulated deficit.................................................................    (49,662)       (49,662)
  Shareholders' equity................................................................      5,982         25,375
</TABLE>
 
- ------------------
(1)  Based upon shares outstanding  as of March 31,  1996. Excludes: (i) 518,244
    shares of Common Stock issuable upon  exercise of options outstanding as  of
    March  31, 1996, with a weighted average  exercise price of $3.49 per share;
    (ii) 39,242  shares  of Common  Stock  issuable upon  exercise  of  warrants
    outstanding as of March 31, 1996, with an exercise price of $3.50 per share;
    (iii)  183,412 shares of Common Stock reserved for future issuance under the
    Company's stock plans; (iv)  39,526 shares of Common  Stock issued to  Metra
    Biosystems  in May 1996 at a purchase price  of $6.325 per share; and (v) an
    aggregate of  up  to $750,000  of  Common Stock  to  be purchased  by  Metra
    Biosystems  at fair market  value upon achievement  of certain milestones by
    the  Company.  See  "Management's  Discussion  and  Analysis  of   Financial
    Condition and Results of Operations," "Business -- Strategic Relationships,"
    "Management  -- 1988 Stock  Incentive Program," "--  Employee Stock Purchase
    Plan," "Description  of  Capital Stock"  and  Notes 7  and  10 of  Notes  to
    Financial Statements.
 
(2)  See Note 1  of Notes to  Financial Statements for  an explanation of shares
    used in computing net loss per share.
 
(3) Adjusted to reflect the sale of 3,000,000 shares of Common Stock offered  by
    the  Company hereby, at an assumed public  Offering price of $7.13 per share
    and after deducting estimated underwriting discounts and commissions and the
    estimated expenses of the Offering,  and the anticipated application of  the
    estimated    net   proceeds   therefrom.   See   "Use   of   Proceeds"   and
    "Capitalization."
 
                                       4
<PAGE>
                                  RISK FACTORS
 
    IN  ADDITION  TO THE  OTHER INFORMATION  IN  THIS PROSPECTUS,  THE FOLLOWING
FACTORS SHOULD BE CONSIDERED CAREFULLY  BY POTENTIAL INVESTORS IN EVALUATING  AN
INVESTMENT  IN THE SHARES OF COMMON  STOCK OFFERED HEREBY. SPECIAL NOTE: CERTAIN
STATEMENTS SET FORTH  BELOW CONSTITUTE "FORWARD-LOOKING  STATEMENTS" WITHIN  THE
MEANING   OF  THE  REFORM  ACT.  SEE  "SPECIAL  NOTE  REGARDING  FORWARD-LOOKING
STATEMENTS" ON PAGE 2 FOR ADDITIONAL FACTORS RELATING TO SUCH STATEMENTS.
 
    HISTORY OF LOSSES;  UNCERTAINTY OF  FUTURE PROFITABILITY.   The Company  has
experienced  significant operating losses  since inception and,  as of March 31,
1996, had an accumulated deficit of $49.7 million. The Company has not generated
significant revenues to  date, and there  can be no  assurance that  significant
revenues  will  ever  be achieved.  The  Company  expects to  continue  to incur
operating losses as well  as negative cash flows  from operations as it  expands
its  product research and development efforts for new test panels, expands sales
and marketing activities  to address the  monitoring market, particularly  POLs,
and  the screening market,  and expands manufacturing  capacity for existing and
new test  panels.  The  Company's  ability  to  increase  revenues  and  achieve
profitability and positive cash flows from operations will depend, in part, upon
successful  commercialization of  existing product  offerings in  the monitoring
market, particularly  to POLs,  of which  there  can be  no assurance.  See  "--
Uncertainty  of Market  Acceptance of  L-D-X System."  The Company's  ability to
increase revenues  and  achieve  profitability  and  positive  cash  flows  from
operations  will  also  depend  upon  the  Company's  ability  to  complete  the
development of and successfully introduce additional diagnostic tests  currently
under  development. There  can be  no assurance  that the  Company's development
efforts will result in  commercially available products,  that the Company  will
obtain required regulatory clearances or approvals for any new tests in a timely
manner,  or at all, that  the Company will be  successful in introducing any new
tests, that the  Company will be  able to achieve  and maintain  cost-efficient,
high-volume  manufacturing capacity for any new tests or that any new tests will
achieve  a  significant  level  of   market  acceptance.  The  development   and
commercialization  of the new  tests will require  additional development, sales
and marketing,  manufacturing and  other expenditures.  The required  level  and
timing  of  such  expenditures  will impact  the  Company's  ability  to achieve
profitability and positive cash flows from operations. There can be no assurance
that  the  Company  will  ever   achieve  significant  commercial  revenues   or
profitability  in  the  future.  See "Management's  Discussion  and  Analysis of
Financial Condition and Results of Operations."
 
    UNCERTAINTY OF MARKET ACCEPTANCE OF L-D-X SYSTEM.  The Company has generated
only limited  revenues to  date, primarily  from sales  of the  L-D-X System  to
hospitals,  public  health  departments,  corporate  wellness  programs,  health
promotion  service  providers,  managed  care  organizations,  community  health
centers,  the military  and others  in the  screening market.  In order  for the
Company to increase revenues and  achieve profitability and positive cash  flows
from  operations, the L-D-X  System must achieve a  significant degree of market
acceptance among health  care providers in  the monitoring market,  particularly
POLs.  The substantial majority of diagnostic tests used by physicians and other
health care providers  are performed  by independent  clinical laboratories  and
hospital-based laboratories. Physicians and other health care providers will not
use  the L-D-X System unless they determine that it is an attractive alternative
to other means of screening or monitoring blood detected diseases,  particularly
independent  clinical laboratories and hospital-based laboratories, and that the
clinical benefits to the  patient and cost savings  achieved through use of  the
L-D-X System outweigh the cost of the system. Such determination will depend, in
part,  upon  the  L-D-X  System's  accuracy,  ease  of  use,  rapid  test  time,
reliability,  cost  effectiveness,   portability  and  level   of  third   party
reimbursement.  Even if  the advantages  of the  L-D-X System  in diagnosing and
monitoring patients with blood detected  diseases are established as  clinically
significant,  physicians,  medical clinics,  pharmacists  and other  health care
providers may elect not to purchase and  use the L-D-X System for any number  of
other  reasons. For example, physicians and  other health care providers may not
change their established means of having such tests performed, may not make  the
necessary  investment to purchase the  Company's products or may  not be able to
obtain adequate reimbursement from third party payors for tests performed  using
the L-D-X System. In addition, the growing prevalence of managed care and health
maintenance  organizations may adversely affect the POL market. A growing number
of physicians are salaried employees and have no financial incentive to  perform
testing. Many HMO and managed care organizations have
 
                                       5
<PAGE>
contracts  with laboratories which require  participating or employed physicians
to send patient  specimens to contracted  laboratories. Finally, physicians  are
under  growing pressure by Medicare and  private insurers to limit their testing
to "medically necessary" tests.  As a result of  these and other factors,  there
can  be  no assurance  that demand  for  the L-D-X  System, particularly  in the
monitoring market, will  be sufficient  to allow for  profitable operations.  In
addition, even if the Company is successful in placing analyzers at the point of
care,  there can  be no  assurance that  placement of  analyzers will  result in
sustained demand for cassettes. The L-D-X System and its component analyzer  and
testing   cassettes,  all  of  which  are  based  upon  a  single  set  of  core
technologies, are currently  the Company's  only products and  will continue  to
account  for substantially  all of  the Company's  revenues for  the foreseeable
future. Because the L-D-X System currently represents the Company's sole product
focus, the Company  could be required  to cease operations  if the L-D-X  System
does  not achieve  a significant  level of  market acceptance.  See "Business --
Market Overview," "-- Products,"  "-- Sales and Marketing"  and "-- Third  Party
Reimbursement."
 
    DEPENDENCE  ON DEVELOPMENT AND INTRODUCTION OF NEW PRODUCTS.  The Company is
in the early stages  of developing tests designed  to extend the L-D-X  System's
capability  to  include  additional  tests  useful  to  health  care  providers,
particularly  POLs.  The   Company  believes   that  its   revenue  growth   and
profitability  will depend, in part, upon its ability to complete development of
and successfully introduce these new tests. In addition, some of these new tests
depend  on   the  development   of   immunoassay-based  technologies   and   the
incorporation  of these technologies into the  L-D-X System. The Company will be
required to undertake time-consuming and costly development activities and  seek
regulatory  approval for  these new  tests. There can  be no  assurance that the
Company will  not  experience  difficulties  that could  delay  or  prevent  the
successful  development,  introduction and  marketing of  these new  tests, that
regulatory clearance or approval of  any new tests will  be granted by the  Food
and  Drug Administration ("FDA") on  a timely basis, if at  all, or that the new
tests will adequately meet the requirements of the applicable market or  achieve
market  acceptance. For example, although the  Company believes that most of the
new tests under development  will require a  pre-market clearance under  Section
510(k)  ("510(k)")  of the  Federal  Food, Drug  and  Cosmetic Act  of  1938, as
amended, for marketing in the United States, a requirement that the Company file
a pre-market approval  ("PMA") application  for a new  test would  significantly
delay  the Company's ability to market  such test and significantly increase the
costs of  development.  Certain of  the  Company's products  under  development,
including  the  PSA  test, may  require  a  PMA. Further,  in  order  to achieve
significant market acceptance, any new tests must be classified as waived  under
CLIA, of which there can be no assurance. In order to successfully commercialize
any  new tests, the Company will be required to establish and maintain reliable,
cost-efficient, high-volume manufacturing capacity  for such tests. The  Company
has  in the past encountered  difficulties in scaling up  production of new test
cassettes, including problems involving  production yields, quality control  and
assurance, variations and impurities in the raw materials and performance of the
manufacturing  equipment. If  the Company is  unable for  technological or other
reasons to complete the development, introduction and scale up of  manufacturing
of  any new tests  or if such  new tests do  not achieve a  significant level of
market acceptance, the  Company's business, financial  condition and results  of
operations  could be materially adversely  affected. See "Business -- Products,"
"-- Manufacturing" and "-- Government Regulation."
 
    LIMITED SALES, MARKETING  AND DISTRIBUTION EXPERIENCE;  DEPENDENCE ON  THIRD
PARTY  DISTRIBUTORS.  In order for the  Company to increase revenues and achieve
profitability, the  L-D-X System  must achieve  a significant  degree of  market
acceptance  among health care  providers in the  monitoring market, particularly
POLs. The  Company has  only limited  experience marketing  and selling  to  the
monitoring  market in the  United States. The Company  intends to distribute its
products  to  this  market  primarily  through  a  limited  number  of  national
distributors.  The  Company  has  only  recently  entered  into  a  distribution
arrangement with such a national distributor,  PSS. The Company may be  required
to  enter into  additional distribution arrangements  in order  to achieve broad
distribution of its products. There can be no assurance that the Company will be
able to maintain the recently established distribution relationship with PSS  or
that  the Company  will be  able to  enter into  and maintain  arrangements with
additional distributors  on a  timely basis,  if  at all.  The Company  will  be
dependent upon these distributors to assist it
 
                                       6
<PAGE>
in  promoting market acceptance of the L-D-X  System and creating demand for the
Company's products. The risks associated with dependence upon distributors  will
be  exacerbated  by the  Company's  intention to  rely  on a  limited  number of
distributors, with the result that sales to these distributors will account  for
a  significant portion of the Company's revenues. There can be no assurance that
these distributors  will devote  the resources  necessary to  provide  effective
sales  and  marketing  support  to  the  Company.  In  addition,  the  Company's
distributors  may  give  higher  priority  to  the  products  of  other  medical
suppliers,  thus  reducing their  efforts to  sell  the Company's  products. The
Company does not expect that its distributors will be contractually committed to
make future purchases of the Company's products and could therefore  discontinue
carrying  the Company's products in favor of  a competitor's product at any time
or  for  any  reason.  If  the  Company  is  unable  to  establish   appropriate
arrangements  with distributors or  if any of  the Company's distributors become
unwilling or unable to promote, market and sell the L-D-X System, the  Company's
business,  financial  condition and  results of  operations would  be materially
adversely affected.  See "Business  -- Sales  and Marketing"  and "--  Strategic
Relationships."
 
    In  addition, in order to increase sales  and market acceptance of the L-D-X
System, the Company will also be required  to expand its direct sales force  and
marketing organization. Establishing a sales and marketing capability sufficient
to  support the level of sales necessary for the Company to attain profitability
will require  substantial  efforts  and  significant  management  and  financial
resources.  The Company is currently actively recruiting a new executive officer
to replace the Company's former Executive Vice President of Marketing and Sales,
who resigned in April 1996. There can  be no assurance that the Company will  be
able to recruit and retain direct sales and marketing personnel, in particular a
new  executive officer  of sales and  marketing, in  order to build  a sales and
marketing organization, that  building such a  sales and marketing  organization
will be cost effective or that the Company's sales and marketing efforts will be
successful. See "Business -- Sales and Marketing."
 
    RISKS  ASSOCIATED  WITH CASSETTE  MANUFACTURING.   The  Company manufactures
internally all of the  test cassettes that are  components of the L-D-X  System.
The  manufacture  of cassettes  is a  highly complex  and precise  process. Such
manufacturing is sensitive to  a wide variety  of factors, including  variations
and  impurities in the raw materials, difficulties in the manufacturing process,
performance of the manufacturing equipment and the level of contaminants in  the
manufacturing  environment. The Company  has in the  past experienced lower than
expected production  yields  that  have adversely  affected  gross  margins  and
delayed  product  shipments. To  the extent  that the  Company does  not achieve
acceptable  manufacturing  yields  of  test  cassettes  or  experiences  product
shipment  delays,  the Company's  business, financial  condition and  results of
operations would  be  materially  adversely  affected.  The  Company's  cassette
manufacturing  lines  represent  a  single point  of  potential  failure  in its
manufacturing process that  would be  costly and  time consuming  to replace  if
their  operation were interrupted. Furthermore, the Company has a limited number
of employees  dedicated  to  the  operation  and  maintenance  of  the  cassette
manufacturing  equipment, the loss of whom could impact the Company's ability to
effectively operate and  service such  equipment. The  interruption of  cassette
manufacturing  operations or  the loss  of employees  dedicated to  the cassette
manufacturing facility could  have a  material adverse effect  on the  Company's
business,   financial  condition   and  results   of  operations.   The  Company
manufactures all  of  the cassettes  at  its Hayward,  California  manufacturing
facility,  and any prolonged inability  to utilize such facility  as a result of
earthquake, fire  or otherwise  would  have a  material  adverse effect  on  the
Company's business, financial condition and results of operations.
 
    The  Company  believes  that it  will  be required  to  expand manufacturing
capacity for new  and existing test  cassettes. There can  be no assurance  that
such  expansion of cassette manufacturing capacity  can be completed in a timely
fashion, if ever. Failure to increase cassette manufacturing capacity on a  cost
effective  and  timely  basis  and  in  compliance  with  applicable  regulatory
requirements would have  a material  adverse effect on  the Company's  business,
financial  condition and results of operations. In addition, the Company will be
required to build  a new cassette  manufacturing line for  the immunoassay  test
cassettes  under development.  To date, the  Company has not  developed the core
technologies,
 
                                       7
<PAGE>
processes and  production equipment  for an  immunoassay cassette  manufacturing
line. Failure to successfully develop an immunoassay cassette manufacturing line
and  achieve  acceptable yields  could  have a  material  adverse effect  on the
Company's business, financial condition and results of operations. See "Business
- -- Manufacturing."
 
    HIGHLY COMPETITIVE INDUSTRY; RAPID TECHNOLOGICAL CHANGE.  The testing market
in  which  the  Company  competes   is  intensely  competitive.  The   Company's
competition   consists   mainly   of  independent   clinical   laboratories  and
hospital-based laboratories, as  well as  manufacturers of bench  top and  other
point  of care analyzers.  The substantial majority of  diagnostic tests used by
physicians  and  other  health  care   providers  are  currently  performed   by
independent  clinical laboratories and  hospital-based laboratories. The Company
expects that  these  laboratories  will  compete  intensely  to  maintain  their
dominance  of the testing market. In order  to achieve market acceptance for the
L-D-X System, the Company will be required to demonstrate that the L-D-X  System
is  an  attractive alternative  to  the clinical  laboratory  and hospital-based
laboratory. This will require  physicians to change  their established means  of
having  such tests performed.  There can be  no assurance that  the L-D-X System
will  be  able  to  compete  with   the  testing  services  provided  by   these
laboratories.  See "--  Uncertainty of Market  Acceptance for  L-D-X System." In
addition, companies having a significant presence in the diagnostic market, such
as Abbott Laboratories, Clinical Diagnostic  Systems, a division of Johnson  and
Johnson  which was formerly a division  of Eastman Kodak Company, and Boehringer
Mannheim  GmbH  ("Boehringer  Mannheim"),  have  developed  or  are   developing
analyzers  targeted  for point  of  care. These  competitors  have substantially
greater financial,  technical, research  and other  resources and  larger,  more
established  marketing, sales,  distribution and service  organizations than the
Company. In  addition, such  competitors offer  broader product  lines than  the
Company,  have greater name recognition than the Company, and offer discounts as
a competitive  tactic.  In addition,  several  smaller companies  are  currently
making  or developing products  that compete or  will compete with  those of the
Company. The Company expects  that the reclassification of  the L-D-X System  as
waived  under CLIA will  result in competitors seeking  to develop products that
qualify for waived  classification. The  Company expects  that such  competitors
will  compete intensely to maintain and  increase their market shares. There can
be no assurance  that the Company's  competitors will not  succeed in  obtaining
CLIA waived status for their products or in developing or marketing technologies
or  products  that  are  more effective  and  commercially  attractive  than the
Company's current  or  future  products,  or that  would  render  the  Company's
technologies  and products  obsolete or  noncompetitive. The  Company's products
must compete effectively overall  with the existing and  future products of  its
competitors  primarily on the basis of ability  to perform tests at the point of
care, ease of use, testing of multiple analytes from a single sample, ability to
conduct tests without  a skilled technician  or a blood  pretreatment step,  the
breadth  of  tests available,  market  presence, cost  effectiveness, precision,
accuracy and immediacy of  results. There can be  no assurance that the  Company
will   have  the   financial  resources,   technical  expertise   or  marketing,
distribution or support capabilities to compete successfully in the future.  See
"Business  -- Products --  Products Under Development,"  "-- Technology" and "--
Competition."
 
    UNCERTAINTY OF  PATENT AND  PROPRIETARY  TECHNOLOGY PROTECTION;  LICENSE  OF
TECHNOLOGY  OF THIRD PARTIES. The Company's  ability to compete effectively will
depend in part on its ability to develop and maintain proprietary aspects of its
technology, and operate  without infringing  the proprietary  rights of  others.
Cholestech  has eight  United States and  several foreign issued  patents and is
currently prosecuting patent applications  with certain foreign patent  offices.
There  can be no assurance that any of the Company's pending patent applications
will result in the issuance of any patents, or that, if issued, any such patents
will offer protection against competitors with similar technology. There can  be
no  assurance that  any patents  issued to the  Company will  not be challenged,
invalidated or circumvented in the future or that the rights created  thereunder
will  provide a  competitive advantage. In  addition, there can  be no assurance
that competitors, many of  which have substantially  greater resources than  the
Company  and have made  substantial investments in  competing technologies, will
not seek to  apply for and  obtain patents covering  technologies that are  more
effective than the Company's technologies or would render
 
                                       8
<PAGE>
the  Company's  technologies  or  products obsolete  or  uncompetitive,  or will
prevent, limit or interfere with the Company's ability to make, use or sell  its
products either in the United States or in international markets.
 
    The medical products industry has been characterized by extensive litigation
regarding  patents  and  other intellectual  property  rights. There  can  be no
assurance that  the Company  will not  in the  future become  subject to  patent
infringement  claims and litigation or interference proceedings conducted in the
United States Patent and Trademark Office ("USPTO") to determine the priority of
inventions. The defense  and prosecution of  intellectual property suits,  USPTO
interference  proceedings, and related legal  and administrative proceedings are
both costly  and time  consuming. Litigation  may be  necessary to  enforce  any
patents issued to the Company, to protect trade secrets or know-how owned by the
Company   or  to  determine  the  enforceability,  scope  and  validity  of  the
proprietary rights of  others. Any  litigation or  interference proceeding  will
result in substantial expense to the Company and significant diversion of effort
by the Company's technical and management personnel. An adverse determination in
litigation  or interference proceedings to which  the Company may become a party
could subject the Company to significant liabilities to third parties or require
the Company to seek licenses  from third parties which  may not be available  on
commercially reasonable terms.
 
    The  Company's  current  products  incorporate  technologies  which  are the
subject of patents  issued to,  and patent  applications filed  by, others.  The
Company has obtained licenses for certain of these technologies. There can be no
assurance  that  the Company  will  be able  to  obtain licenses  for technology
patented by others  on commercially reasonable  terms, that it  will be able  to
develop  alternative  approaches  if  unable  to  obtain  licenses  or  that the
Company's current and  future licenses  will be  adequate for  the operation  of
Cholestech's  business.  The failure  to obtain  such  licenses or  identify and
implement alternative approaches  could have  a material adverse  effect on  the
Company's business, financial condition and results of operations.
 
    The   Company  also  relies  upon  trade  secrets,  technical  know-how  and
continuing invention to  develop and  maintain its competitive  position and  no
assurance  can be given that others will not independently develop substantially
equivalent proprietary information  and techniques or  otherwise gain access  to
the Company's trade secrets or disclose such technology, or that the Company can
meaningfully  protect its right to its trade secrets, any of which could have an
adverse effect on  the Company's  business, financial condition  and results  of
operations. See "Business -- Patents and Proprietary Technology."
 
    GOVERNMENT  REGULATION.   The manufacture  and sale  of diagnostic products,
including the  L-D-X System,  are subject  to extensive  regulation by  numerous
governmental  authorities,  principally  the  FDA  and  corresponding  state and
foreign regulatory agencies. The Company will not be able to commence  marketing
or  commercial sales  in the  United States  of any  of the  new tests  until it
receives clearance or approval  from the FDA. The  process of obtaining FDA  and
other  required regulatory  clearances and  approvals is  lengthy, expensive and
uncertain. As a result, there can be no assurance that any of the Company's  new
tests  under development, even if successfully  developed, will ever obtain such
clearance  or  approval.  Additionally,  certain  material  changes  to  medical
products  already cleared or approved by the FDA are also subject to further FDA
review and clearance or approval. The loss of previously obtained clearances, or
failure to comply with existing or  future regulatory requirements would have  a
material  adverse  effect on  the  Company's business,  financial  condition and
results of  operations.  The L-D-X  Analyzer  and all  existing  test  cassettes
required 510(k) clearance. A 510(k) clearance is subject to continual review and
later discovery of previously unknown problems may result in restrictions on the
product's  marketing or withdrawal  of the product from  the market. In general,
the Company  intends  to develop  and  market  tests that  will  require  510(k)
clearance.  It  generally takes  from four  to  twelve months  from the  date of
submission to obtain  510(k) clearance,  but it  can take  longer. In  addition,
certain  of the Company's products under development,  such as the PSA test, may
require submission of a PMA application which  is a much longer and more  costly
process  and involves the  submission of extensive  supporting data and clinical
information. A  PMA  application must  be  filed if  a  proposed device  is  not
substantially equivalent to a legally marketed Class I or Class II device, or if
it is a
 
                                       9
<PAGE>
Class  III  device for  which  the FDA  has called  for  PMAs. See  "Business --
Government Regulation." A PMA application may be submitted to the FDA only after
clinical trials and  the required patient  follow-up for a  particular test  are
successfully  completed. Upon filing  of a PMA application,  the FDA commences a
review process that generally takes  one to three years  from the date on  which
the  PMA application is accepted for  filing, but may take significantly longer.
There can be  no assurance that  the Company's products  under development  will
require  only  510(k) clearance  rather than  the more  lengthy PMA  approval. A
requirement that  the  Company file  a  PMA application  for  a new  test  would
significantly  delay the Company's ability to market such test and significantly
increase the costs of development. See "Business -- Government Regulation."
 
    Sales of medical devices outside the United States are subject to regulatory
requirements that vary  from country  to country.  The time  required to  obtain
approval  to market medical devices may be  shorter or longer than that required
for FDA approval,  and the  requirements could differ.  Such requirements  could
adversely effect the Company's ability to sell its products internationally.
 
    The  use  of Cholestech's  products  and those  of  its competitors  is also
affected by 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,"  or  as  being "moderately
complex" or  "highly complex,"  on  the basis  of  specific criteria.  Prior  to
January  1996,  CLIA categorized  the L-D-X  System  as moderately  complex. The
testing of  control materials  on the  L-D-X  System, as  required by  CLIA  for
laboratories  performing moderately complex tests, involved the additional daily
expense of two test cassettes and control materials, and adversely affected  the
cost  effective utilization of the L-D-X System  by low volume users. In January
1996, the L-D-X System and the total cholesterol ("TC"), HDL, Triglycerides  and
Glucose  tests in  any combination  were reclassified  as waived  under CLIA. In
order  to  successfully  commercialize  the  tests  that  are  currently   under
development,  the Company  believes that  it will  be critical  to obtain waived
classification for such tests under CLIA. There can be no assurance that any new
tests developed by the Company will  qualify for the waived classification.  Any
failure  of the  new tests  to obtain  waived status  under CLIA  will adversely
impact the Company's  ability to commercialize  such tests, which  could have  a
material  adverse  effect on  the  Company's business,  financial  condition and
results of operations. In  addition, there can be  no assurance that any  future
amendment  of  CLIA  or  the promulgation  of  additional  regulations impacting
laboratory testing will not have an  adverse effect on the Company's ability  to
market  the L-D-X System.  For example, if  CLIA regulations were  modified in a
manner that reduced  regulatory requirements  and burdens  faced by  competitive
products, any competitive advantage of the L-D-X System's waived status would be
reduced or eliminated.
 
    The Company's manufacturing processes, as well as in certain instances those
of  its contract manufacturers are also  subject to stringent federal, state and
local regulations governing the use, generation, manufacture, storage,  handling
and  disposal  of certain  materials and  wastes. The  Company and  its contract
manufacturers must economically manufacture products in compliance with federal,
state and foreign regulations regarding the manufacture of health care  products
and  diagnostic devices, including current  Good Manufacturing Practice ("cGMP")
regulations and similar foreign regulations  and state and local health,  safety
and  environmental regulations, which include testing, control and documentation
requirements. Failure  to  comply  with cGMP  and  other  applicable  regulatory
requirements   by  the  Company  and  in  certain  circumstances,  its  contract
manufacturers, including marketing  products for unapproved  uses, could  result
in,  among other things,  warning letters, fines,  injunctions, civil penalties,
recall or  seizure  of products,  total  or partial  suspension  of  production,
refusal of the government to grant premarket clearance or premarket approval for
devices,  withdrawal of approvals and  criminal prosecution. Changes in existing
regulations or  adoption  of  new governmental  regulations  or  policies  could
prevent  or delay regulatory approval of the Company's products. There can be no
assurance that the Company  will not be required  to incur significant costs  in
the  future in complying  with manufacturing and  environmental regulations. See
"Business -- Government Regulation."
 
    UNCERTAINTY RELATING TO THIRD  PARTY REIMBURSEMENT.   In the United  States,
health   care  providers,  such  as  hospitals  and  physicians,  that  purchase
diagnostic products such as the Company's
 
                                       10
<PAGE>
L-D-X System, generally rely on  third party payors, principally private  health
insurance  plans, federal Medicare and state  Medicaid, to reimburse all or part
of the cost of the procedure in  which the product is being used. The  Company's
ability  to commercialize  its products successfully  in the  United States will
depend in  part on  the extent  to which  reimbursement for  the costs  of  such
products  and  related  treatment  will  be  available  from  government  health
authorities (such as  the Health Care  Financing Administration ("HCFA"),  which
determines  Medicare reimbursement  levels), private  health insurers  and other
organizations. Such third party  payors can affect the  pricing or the  relative
attractiveness  of the  Company's products by  regulating the  maximum amount of
reimbursement provided by  such payors  for testing  services. Reimbursement  is
currently not available for certain uses of the Company's products. For example,
the  cost  of the  L-D-X System  is  generally not  subject to  reimbursement by
government and other  third party payors.  In addition, the  tests performed  by
public  health departments, corporate  wellness programs and  other large volume
users in the  screening market are  generally not subject  to reimbursement.  In
addition, certain health care providers are moving towards a managed care system
in  which such  providers contract  to provide  comprehensive health  care for a
fixed cost per  patient. Managed care  providers are attempting  to control  the
cost  of health care by authorizing fewer elective procedures, such as screening
of blood disease levels. The Company is  unable to predict what changes will  be
made  in the reimbursement  methods utilized by third  party payors. The Company
could be adversely affected by changes in reimbursement policies of governmental
or private  health care  payors, particularly  to the  extent any  such  changes
affect  reimbursement for procedures  in which the  Company's products are used.
Third party  payors are  increasingly scrutinizing  and challenging  the  prices
charged  for medical products  and services. Decreases  in reimbursement amounts
for tests performed using the Company's products may decrease amounts physicians
and other practitioners are able to charge patients, which in turn may adversely
affect the Company's ability to sell its products on a profitable basis. Failure
by physicians and other users to  obtain reimbursement from third party  payors,
or  changes  in  government  and private  third  party  payors'  policies toward
reimbursement of tests employing  the Company's products  could have a  material
adverse  effect on  the Company's business,  financial condition  and results of
operations. Given the  efforts to control  and reduce health  care costs in  the
United  States  in  recent  years,  there can  be  no  assurance  that currently
available levels of reimbursement  will continue to be  available in the  future
for the Company's existing products or products under development.
 
    Effective  October 1, 1991,  HCFA adopted new  regulations providing for the
inclusion of  capital-related costs  in the  prospective payment  system,  under
which providers are reimbursed on a per-diagnosis basis at fixed rates unrelated
to  actual costs, based on diagnostic related groups ("DRGs"). Under this system
of reimbursement, equipment costs generally  will not be reimbursed  separately,
but  rather will be included in a single, fixed-rate, per patient reimbursement.
These regulations are being phased in over a ten year period, and, although  the
full implications of these regulations cannot yet be known, the Company believes
that  the  new  regulations will  place  more pressure  on  hospitals' operating
margins, causing them  to limit  capital expenditures.  These regulations  could
have  an adverse effect  on the Company  if hospitals decide  to defer obtaining
medical  equipment  as  a  result  of  any  such  limitation  on  their  capital
expenditures.  The  Company is  unable  to predict  what  adverse impact  on the
Company, if any, additional  government regulations, legislation or  initiatives
or  changes by  other payors affecting  reimbursement or other  matters that may
influence decisions to obtain medical equipment may have.
 
    In addition, market  acceptance of the  Company's products in  international
markets  is dependent,  in part, upon  the availability  of reimbursement within
prevailing health care  payment systems. Reimbursement  and health care  payment
systems in international markets vary significantly by country, and include both
government sponsored health care and private insurance.
 
    The  Company believes that  the overall escalating  cost of medical products
and services has led to and will continue to lead to increased pressures on  the
health  care industry, both foreign and domestic, to reduce the cost of products
and services,  including  products offered  by  the  Company. There  can  be  no
assurance  as  to  either United  States  or  foreign markets  that  third party
reimbursement  and  coverage  will  be  available  or  adequate,  that   current
reimbursement   amounts  will   not  be   decreased  in   the  future   or  that
 
                                       11
<PAGE>
future legislation, regulation, or reimbursement policies of third party  payors
will not otherwise adversely affect the demand for the Company's products or its
ability to sell its products on a profitable basis. See "Business -- Third Party
Reimbursement."
 
    FLUCTUATIONS  IN QUARTERLY RESULTS.   The Company may experience significant
fluctuations in revenues and results of operations on a quarter to quarter basis
in the  future.  Quarterly operating  results  will fluctuate  due  to  numerous
factors,  including  the timing  and  level of  market  acceptance of  the L-D-X
System, particularly by POLs, the timing of introduction and availability of new
tests, the  timing  and  level  of  expenditures  associated  with  new  product
development  activities, the  timing and  level of  expenditures associated with
expansion  of  sales  and  marketing  activities  and  overall  operations,  the
Company's ability to cost effectively expand cassette manufacturing capacity and
maintain  consistently acceptable  yields in  the manufacture  of cassettes, the
timing of establishment of strategic  distribution arrangements and the  success
of the activities conducted under such arrangements, variations in manufacturing
efficiencies,   changes  in  demand  for   its  products,  order  cancellations,
competition, changes in government regulation  and other factors, the timing  of
significant  orders  from  and  shipments  to  customers,  and  general economic
conditions. These factors are difficult to forecast, and these or other  factors
could  have  a  material adverse  effect  on the  Company's  business, financial
condition and  results  of  operations. Fluctuations  in  quarterly  demand  for
products  may  adversely affect  the continuity  of the  Company's manufacturing
operations, increase uncertainty in operational planning, disrupt cash flow from
operations and contribute to  the volatility of the  Company's stock price.  The
Company's  expenses are based in part on the Company's expectations as to future
revenue levels and to a large extent are fixed in the short term. If revenues do
not meet expectations, the Company's  business, financial condition and  results
of  operations could be materially adversely affected. The Company believes that
period to  period  comparisons of  its  operating results  are  not  necessarily
meaningful  and should not be relied  upon as indications of future performance.
As a result of the foregoing factors,  it is likely that in some future  quarter
the  Company's revenue  or operating results  will be below  the expectations of
public market analysts and investors. In  such event the price of the  Company's
Common   Stock  could  be  materially   adversely  affected.  See  "Management's
Discussion and Analysis of  Financial Condition and  Results of Operations"  and
"Business -- Manufacturing."
 
    NEED  TO  MANAGE EXPANDING  OPERATIONS.   If  the  Company is  successful in
achieving market acceptance for the L-D-X  System, the Company will be  required
to expand its operations, particularly in the areas of research and development,
sales  and marketing and manufacturing. As the Company expands its operations in
these  areas,  such  expansion   will  likely  result   in  new  and   increased
responsibilities  for management personnel and place significant strain upon the
Company's  management,  operating  and  financial  systems  and  resources.   To
accommodate  any  such  growth  and compete  effectively,  the  Company  will be
required to implement and improve information systems, procedures and  controls,
and  to expand, train, motivate and manage  its work force. The Company's future
success will depend to a  significant extent on the  ability of its current  and
future  management personnel to operate effectively, both independently and as a
group. There  can  be  no  assurance  that  the  Company's  personnel,  systems,
procedures  and  controls  will  be adequate  to  support  the  Company's future
operations. Any  failure to  implement and  improve the  Company's  operational,
financial  and  management  systems  or to  expand,  train,  motivate  or manage
employees as required by  future growth, if any,  could have a material  adverse
effect on the Company's business, financial condition and results of operations.
See  "-- Dependence on Retention and  Attraction of Key Employees" and "Business
- -- Employees" and "Management."
 
    DEPENDENCE ON SUPPLIERS.  Certain key  components and raw materials used  in
the   manufacturing  of  the  Company's   products  are  currently  provided  by
single-source vendors. Although  the Company believes  that alternative  sources
for  such components and raw materials are available, any supply interruption in
a single-sourced  raw material  would  have a  material  adverse effect  on  the
Company's  ability to  manufacture products  until a  new source  of supply were
qualified. There can  be no  assurance that the  Company will  be successful  in
qualifying  additional sources on a  timely basis or at  all, which would have a
material adverse effect on the  Company's business. In addition, an  uncorrected
impurity  or  supplier's variation  in  a raw  material,  either unknown  to the
Company or incompatible with the  Company's manufacturing process, could have  a
material adverse effect on the Company's ability to
 
                                       12
<PAGE>
manufacture  products. Also, because the Company is  a small customer of many of
its suppliers, there  can be no  assurance that suppliers  will devote  adequate
resources to supplying the Company's needs. Any interruption or reduction in the
future  supply of  any key components  or raw materials  currently obtained from
single or limited sources could have a material adverse effect on the  Company's
business,  operating results  and financial condition  in any  given period. See
"Business -- Manufacturing."
 
    DEPENDENCE ON  RETENTION AND  ATTRACTION OF  KEY EMPLOYEES.   The  Company's
success  depends in significant  part upon the continued  service of certain key
scientific, technical, regulatory and  managerial personnel, and its  continuing
ability to attract and retain additional highly qualified scientific, technical,
clinical, regulatory and managerial personnel. Competition for such personnel is
intense,  and there can be no assurance that  the Company will be able to retain
such personnel  or  that  it  can  attract  or  retain  other  highly  qualified
scientific,  technical,  clinical, regulatory  and  managerial personnel  in the
future, including key sales and marketing personnel. In particular, the  Company
is  currently  actively  recruiting  a  new  executive  officer  to  replace the
Company's former Executive Vice President  of Marketing and Sales, who  resigned
in  April 1996. The loss of additional key personnel or the inability to hire or
retain qualified personnel, in particular a  new executive officer of sales  and
marketing,  could have  a material adverse  effect upon  the Company's business,
financial condition and results of operations.
 
    POSSIBLE FUTURE  CAPITAL  REQUIREMENTS.    The  Company  intends  to  expend
substantial  funds for research and product  development, expansion of sales and
marketing activities,  expansion of  manufacturing  capacity and  other  working
capital  and general corporate purposes. Although  the Company believes that the
net proceeds  of the  Offering, together  with its  unrestricted cash  balances,
internally  generated funds, bank borrowings under  existing lines of credit and
proceeds from issuances of Common Stock to Metra Biosystems, will be  sufficient
to  meet its capital  requirements for the  foreseeable future, there  can be no
assurance that the Company will  not require additional financing. For  example,
the  Company  may  be  required  to expend  greater  than  anticipated  funds if
unforeseen difficulties arise in  expanding manufacturing capacity for  existing
cassettes  or  in  the  course of  completing  required  additional development,
obtaining necessary regulatory approvals, obtaining waived status under CLIA  or
introducing  or scaling  up manufacturing  for new  tests. The  Company's future
liquidity and capital requirements will depend upon numerous additional factors,
including the  costs and  timing  of expansion  of manufacturing  capacity,  the
number  and type of new tests the Company seeks to develop, the success of these
development efforts, the costs  and timing of expansion  of sales and  marketing
activities,  the extent  to which the  Company's existing and  new products gain
market acceptance, competing technological and market developments, the progress
of commercialization efforts of the  Company's distributors, the costs  involved
in  preparing, filing, prosecuting, maintaining  and enforcing patent claims and
other intellectual property rights, developments related to regulatory and third
party reimbursement  matters and  CLIA, and  other factors.  In the  event  that
additional  financing is needed, the Company  may seek to raise additional funds
through public  or  private  financing,  collaborative  relationships  or  other
arrangements.  Any additional equity financing  may be dilutive to shareholders,
and  debt   financing,  if   available,  may   involve  restrictive   covenants.
Collaborative  arrangements, if necessary to raise additional funds, may require
the Company to relinquish its rights to certain of its technologies, products or
marketing territories. The failure of the  Company to raise capital when  needed
could  have  a  material adverse  effect  on the  Company's  business, financial
condition and  results  of operations.  There  can  be no  assurance  that  such
financing,  if required, will be available on satisfactory terms, if at all. See
"Use of  Proceeds"  and  "Management's  Discussion  and  Analysis  of  Financial
Condition and Results of Operations -- Liquidity and Capital Resources."
 
    SUFFICIENCY  AND AVAILABILITY OF  PRODUCT LIABILITY INSURANCE.   Sale of the
Company's products entails risk of product liability claims. The medical testing
industry has  historically  been  litigious, and  the  Company  faces  financial
exposure  to product  liability claims  in the  event that  use of  its products
result in personal injury. The Company  also faces the possibility that  defects
in the design or manufacture of its products might necessitate a product recall.
There  can be no  assurance that the  Company will not  experience losses due to
product liability  claims  or  recalls  in the  future.  The  Company  currently
maintains  product liability insurance with coverage  limits of $5.0 million per
occurrence and  $5.0 million  annually in  the aggregate,  and there  can be  no
assurance that the coverage limits of the Company's
 
                                       13
<PAGE>
insurance  policies will be adequate. Such  insurance is expensive, difficult to
obtain and may not be available in the future on acceptable terms, or at all. No
assurance can be given that product liability insurance can be maintained in the
future at a  reasonable cost  or in sufficient  amounts to  protect the  Company
against  losses  due to  liability.  An inability  to  maintain insurance  at an
acceptable cost  or to  otherwise protect  against potential  product  liability
could  prevent  or  inhibit  the continued  commercialization  of  the Company's
products. In addition, a product liability claim in excess of relevant insurance
coverage or product recall could have a material adverse effect on the Company's
business, financial  condition  and  results of  operations.  See  "Business  --
Product Liability and Insurance."
 
    UNCERTAINTY  RELATED  TO  HEALTH  CARE  REFORM.    Political,  economic  and
regulatory influences  are subjecting  the health  care industry  in the  United
States  to  fundamental change.  The  Company anticipates  that  Congress, state
legislatures  and  the  private  sector  will  continue  to  review  and  assess
alternative  health care delivery and payment systems. Potential approaches that
have been considered include  mandated basic health  care benefits, controls  on
health  care  spending  through  limitations on  the  growth  of  private health
insurance premiums and  Medicare and  Medicaid spending, the  creation of  large
insurance purchasing groups, price controls and other fundamental changes to the
health  care delivery system. Legislative debate  is expected to continue in the
future, and market  forces are  expected to  demand reduced  costs. The  Company
cannot  predict what  impact the  adoption of any  federal or  state health care
reform measures, future private sector reform  or market forces may have on  its
business.
 
    MANAGEMENT  DISCRETION OVER PROCEEDS OF THE  OFFERING.  Although the Company
expects to use approximately $6.0 million  of the net proceeds of this  Offering
for  repayment  of  indebtedness,  for research  and  development,  expansion of
manufacturing capacity, and expansion of sales and marketing capabilities during
fiscal 1997, the  Company's management will  retain broad discretion  as to  the
allocation  of a significant portion  of the net proceeds  of this Offering. See
"Use of Proceeds."
 
    ISSUANCE OF PREFERRED STOCK COULD DELAY OR PREVENT CORPORATE TAKEOVER.   The
Board  of  Directors  has the  authority  to  issue up  to  5,000,000  shares of
undesignated  Preferred  Stock  and   to  determine  the  rights,   preferences,
privileges and restrictions of such shares without any further vote or action by
the  shareholders. The issuance  of Preferred Stock  under certain circumstances
could have the  effect of  delaying or  preventing a  change in  control of  the
Company  or otherwise  adversely affecting the  rights of the  holders of Common
Stock. See "Description of Capital Stock."
 
    POTENTIAL VOLATILITY OF  STOCK PRICE.   The market  price of  the shares  of
Common  Stock, like that of the common  stock of many other medical products and
high technology companies, has in the past been, and is likely in the future  to
continue  to be highly  volatile. Factors such as  fluctuations in the Company's
operating results, announcements of technological innovations or new  commercial
products  by the Company  or competitors, government  regulation, changes in the
current structure of the health care financing and payment systems, developments
in or disputes regarding patent or other proprietary rights, economic and  other
external  factors and general market conditions may have a significant effect on
the market price of the Common Stock.  Moreover, the stock market has from  time
to   time  experienced  extreme   price  and  volume   fluctuations  which  have
particularly affected the market prices for medical products and high technology
companies and which have  often been unrelated to  the operating performance  of
such  companies. These broad  market fluctuations, as  well as general economic,
political and market conditions,  may adversely affect the  market price of  the
Company's  Common Stock.  In the  past, following  periods of  volatility in the
market price  of a  company's stock,  securities class  action litigations  have
occurred  against  the issuing  company.  There can  be  no assurance  that such
litigation will  not occur  in the  future  with respect  to the  Company.  Such
litigation  could result  in substantial costs  and a  diversion of management's
attention and  resources, which  could have  a material  adverse effect  on  the
Company's  business,  operating  results and  financial  condition.  Any adverse
determination in such litigation could  also subject the Company to  significant
liabilities. See "Price Range of Common Stock."
 
    DILUTION.   Investors  participating in  the Offering  will incur immediate,
substantial  dilution.  To  the  extent  outstanding  options  to  purchase  the
Company's  Common  Stock  are exercised,  there  will be  further  dilution. See
"Dilution."
 
                                       14
<PAGE>
    ABSENCE OF DIVIDENDS.   The Company  has not paid  any cash dividends  since
inception  and  does not  anticipate paying  cash  dividends in  the foreseeable
future. See "Dividend Policy."
 
                                  THE COMPANY
 
    Cholestech was incorporated  under the laws  of the state  of California  on
February  2, 1988. The Company's principal executive offices are located at 3347
Investment Boulevard, Hayward,  California 94545,  and its  telephone number  is
(510) 732-7200.
 
    Cholestech,  L-D-X and  the logo are  registered trademarks  of the Company.
This Prospectus also includes trademarks of companies other than the Company.
 
                                       15
<PAGE>
                                USE OF PROCEEDS
 
    The net proceeds to  the Company from  the sale of  the 3,000,000 shares  of
Common  Stock offered  hereby are  estimated to  be approximately  $19.4 million
($22.4 million if the Underwriters' over-allotment option is exercised in full),
based on  an assumed  Offering price  of $7.13  per share,  and after  deducting
estimated  underwriting discounts and commissions  and the estimated expenses of
the Offering.
 
    From these estimated net  proceeds, the Company  will repay the  outstanding
balances  of the Company's (i) bank line of credit (approximately $250,000 as of
March 31, 1996), which borrowings bore interest  at 8.25% per annum as of  March
31,  1996, which mature on October 31,  1996, and which were incurred to provide
working capital and (ii)  a long-term note of  approximately $1.3 million as  of
March 31, 1996, which borrowings bear interest at a rate of 16% per annum, which
are  required to be repaid in  36 monthly installments of approximately $53,000,
and which  were incurred  to provide  working capital.  The balance  of the  net
proceeds  will be used for research and  development related to the expansion of
test menus, of  which approximately $2.0  million has been  budgeted for  fiscal
1997,  capital expenditures related  to expansion of  manufacturing capacity, of
which approximately $2.0 million has been budgeted for fiscal 1997, expansion of
sales and  marketing  capabilities, of  which  approximately $500,000  has  been
budgeted  for fiscal 1997,  and for other working  capital and general corporate
purposes. The  Company may  also  use a  portion of  the  net proceeds  for  the
acquisition  of technologies, businesses  or products that  are complementary to
those of  the  Company, although  no  such  acquisitions are  planned  or  being
negotiated as of the date of this Prospectus, and no portion of the net proceeds
has  been allocated  for any  specific acquisition.  Pending such  uses, the net
proceeds of  this Offering  will be  invested in  short-term, interest  bearing,
investment grade securities.
 
    The  actual amount expended  and timing of  the use of  net proceeds of this
Offering for each purpose  may vary significantly  depending upon many  factors,
including  the  costs and  timing of  expansion  of manufacturing  capacity, the
number and type  of tests the  Company seeks  to develop, the  success of  these
development  efforts, the costs  and timing of expansion  of sales and marketing
activities, the extent  to which the  Company's existing and  new products  gain
market acceptance, competing technological and market developments, the progress
of  commercialization efforts of the  Company's distributors, the costs involved
in preparing, filing, prosecuting, maintaining  and enforcing patent claims  and
other intellectual property rights, developments related to regulatory and third
party reimbursement matters and CLIA, and other factors.
 
                                       16
<PAGE>
                          PRICE RANGE OF COMMON STOCK
 
    The Company's Common Stock is quoted on the Nasdaq National Market under the
symbol  "CTEC." On May 23, 1996, the  last reported sale price for the Company's
Common Stock on the  Nasdaq National Market was  $7.13 per share. The  following
table  sets  forth  the quarterly  high  and  low closing  sale  prices  for the
Company's Common Stock.
 
<TABLE>
<CAPTION>
                                                                HIGH        LOW
                                                              ---------  ---------
<S>                                                           <C>        <C>
FISCAL YEAR 1995
  First Quarter                                               $    5.25  $    2.50
  Second Quarter                                                   3.25       1.75
  Third Quarter                                                    3.25       1.13
  Fourth Quarter                                                   3.00       1.50
 
FISCAL YEAR 1996
  First Quarter                                               $    2.50  $    1.50
  Second Quarter                                                   3.00       2.13
  Third Quarter                                                    3.75       2.25
  Fourth Quarter                                                   7.56       3.13
 
FISCAL YEAR 1997
  First Quarter (through May 23, 1996)                        $    7.63  $    5.75
</TABLE>
 
    On May  7, 1996,  there were  approximately  309 holders  of record  of  the
Company's Common Stock.
 
                                DIVIDEND POLICY
 
    The  Company has never declared or paid  dividends on its capital stock. The
Company currently expects  to retain  future earnings,  if any,  to finance  the
growth  and  development of  its business  and,  therefore, does  not anticipate
paying  any  cash  dividends  in  the  foreseeable  future.  See   "Management's
Discussion and Analysis of Financial Condition and Results of Operations."
 
                                       17
<PAGE>
                                 CAPITALIZATION
 
    The  following table sets forth the  actual capitalization of the Company as
of March 31, 1996 and as adjusted to give effect to the sale of 3,000,000 shares
of Common Stock offered by  the Company hereby at  an assumed Offering price  of
$7.13  per  share,  and  after deducting  estimated  underwriting  discounts and
commissions and  the estimated  expenses of  the Offering,  and the  anticipated
application of the estimated net proceeds therefrom. See "Use of Proceeds."
 
<TABLE>
<CAPTION>
                                                                                              MARCH 31, 1996
                                                                                        --------------------------
                                                                                         ACTUAL    AS ADJUSTED (2)
                                                                                        ---------  ---------------
<S>                                                                                     <C>        <C>
                                                                                              (IN THOUSANDS)
Short-term debt including current portion of long-term liabilities (1)................  $     782    $        33
                                                                                        ---------  ---------------
                                                                                        ---------  ---------------
Long-term liabilities, net of current portion (1).....................................  $     810    $        11
                                                                                        ---------  ---------------
Shareholders' equity:
  Preferred Stock, no par value; 5,000,000 shares authorized, none issued and
   outstanding, actual and as adjusted................................................     --            --
  Common Stock, no par value; 25,000,000 shares authorized, 8,131,824 shares issued
   and outstanding, actual; 11,131,824 shares issued and outstanding, as adjusted
   (2)................................................................................     55,644         75,037
  Accumulated deficit.................................................................    (49,662)       (49,662)
                                                                                        ---------  ---------------
    Total shareholders' equity........................................................      5,982         25,375
                                                                                        ---------  ---------------
      Total capitalization............................................................  $   6,792    $    25,386
                                                                                        ---------  ---------------
                                                                                        ---------  ---------------
</TABLE>
 
- ------------------------
(1) See Note 4 of Notes to Financial Statements.
 
(2) Excludes:  (i)  518,244 shares  of Common  Stock  issuable upon  exercise of
    options outstanding as of March 31,  1996, with a weighted average  exercise
    price  of $3.49 per share; (ii) 39,242  shares of Common Stock issuable upon
    exercise of warrants  outstanding as  of March  31, 1996,  with an  exercise
    price  of $3.50 per share; (iii) 183,412 shares of Common Stock reserved for
    future issuance  under the  Company's  stock plans;  (iv) 39,526  shares  of
    Common  Stock issued to Metra Biosystems in  May 1996 at a purchase price of
    $6.325 per share; and (v) an aggregate of up to $750,000 of Common Stock  to
    be  purchased by Metra  Biosystems at fair market  value upon achievement of
    certain milestones by the Company. See "Management's Discussion and Analysis
    of Financial Condition  and Results of  Operations," "Business --  Strategic
    Relationships,"  "Management -- 1988 Stock  Incentive Program," "-- Employee
    Stock Purchase Plan," "Description of Capital  Stock" and Notes 7 and 10  of
    Notes to Financial Statements.
 
                                       18
<PAGE>
                                    DILUTION
 
    The  net  tangible book  value of  the Company  at March  31, 1996  was $5.7
million, or $0.70 per share. Net tangible  book value per share is equal to  the
Company's  net  tangible  assets  (tangible assets  of  the  Company  less total
liabilities) divided  by  the number  of  shares of  Common  Stock  outstanding.
Without  taking into account any other changes  in net tangible book value after
March 31, 1996 other than to give effect to the sale of the 3,000,000 shares  of
Common  Stock by  the Company in  the Offering  at an assumed  Offering price of
$7.13 per  share  and  after  deducting  estimated  underwriting  discounts  and
commissions  and  the estimated  expenses  of the  Offering,  the pro  forma net
tangible book value of the  Company as of March 31,  1996 would have been  $25.1
million,  or  $2.25 per  share.  This represents  an  immediate increase  in net
tangible book value of $1.55 per share to existing shareholders and an immediate
dilution in net tangible  book value of  $4.88 per share  to new investors.  The
following  table  sets forth  the per  share  dilution to  new investors  in the
Offering:
 
<TABLE>
<S>                                                                    <C>          <C>
Assumed Offering price per share.....................................               $    7.13
  Net tangible book value per share at March 31, 1996................   $    0.70
  Increase per share attributable to new investors...................        1.55
                                                                            -----
Pro forma net tangible book value per share after the Offering.......                    2.25
                                                                                    ---------
Dilution per share to new investors..................................               $    4.88
                                                                                    ---------
                                                                                    ---------
</TABLE>
 
    The foregoing  computations  exclude: (i)  518,244  shares of  Common  Stock
issuable  upon exercise  of options  outstanding as  of March  31, 1996,  with a
weighted average exercise price of $3.49 per share; (ii) 39,242 shares of Common
Stock issuable upon exercise of warrants outstanding as of March 31, 1996,  with
an  exercise price  of $3.50  per share;  (iii) 183,412  shares of  Common Stock
reserved for future issuance under the Company's stock plans; (iv) 39,526 shares
of Common Stock issued to  Metra Biosystems in May 1996  at a purchase price  of
$6.325  per share; and (v) an aggregate of  up to $750,000 of Common Stock to be
purchased by Metra Biosystems at fair  market value upon achievement of  certain
milestones  by the  Company. To  the extent that  such options  and warrants are
exercised or  such shares  are issued,  there will  be further  dilution to  new
investors.  See "Management's Discussion and Analysis of Financial Condition and
Results of Operations,"  "Business -- Strategic  Relationships," "Management  --
1988  Stock Incentive Program," "--  Employee Stock Purchase Plan," "Description
of Capital Stock" and Notes 7 and 10 of Notes to Financial Statements.
 
                                       19
<PAGE>
                            SELECTED FINANCIAL DATA
 
    The following selected financial data should be read in conjunction with the
Company's  Financial Statements  and Notes thereto  and "Management's Discussion
and  Analysis  of  Financial  Condition  and  Results  of  Operations"  included
elsewhere  in this Prospectus. The statement  of operations data set forth below
for the fiscal years ended March 31,  1994, 1995 and 1996 and the balance  sheet
data  as of March 31, 1995 and 1996 are derived from financial statements of the
Company that have been audited by Price Waterhouse LLP, independent accountants,
which are included elsewhere in this Prospectus, and are qualified by  reference
to such financial statements and notes thereto. The statement of operations data
for the fiscal years ended March 31, 1992 and 1993 and the balance sheet data as
of  March 31, 1992, 1993  and 1994 are derived  from financial statements of the
Company that have  been audited  by Price Waterhouse  LLP and  are not  included
herein.
<TABLE>
<CAPTION>
                                                                          YEAR ENDED MARCH 31,
                                                          -----------------------------------------------------
                                                            1992       1993       1994       1995       1996
                                                          ---------  ---------  ---------  ---------  ---------
                                                                  (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                                                       <C>        <C>        <C>        <C>        <C>
STATEMENT OF OPERATIONS DATA:
  Revenues:
    Products............................................  $     939  $   3,744  $   3,029  $   4,038  $   6,873
    Licenses............................................        579         --         --         --         --
                                                          ---------  ---------  ---------  ---------  ---------
                                                              1,518      3,744      3,029      4,038      6,873
  Cost of products sold.................................        565      4,908      4,972      3,933      4,505
                                                          ---------  ---------  ---------  ---------  ---------
  Gross profit (loss)...................................        953     (1,164)    (1,943)       105      2,368
                                                          ---------  ---------  ---------  ---------  ---------
  Operating expenses:
    Research and development............................      6,124      1,843      2,134        715        714
    Sales and marketing.................................      1,446      2,171      2,909      2,694      3,168
    General and administrative..........................      2,373      3,133      2,288      1,983      1,376
                                                          ---------  ---------  ---------  ---------  ---------
      Total operating expenses..........................      9,943      7,147      7,331      5,392      5,258
                                                          ---------  ---------  ---------  ---------  ---------
  Loss from operations..................................     (8,990)    (8,311)    (9,274)    (5,287)    (2,890)
  Interest income, net..................................        100        246        364        243        144
                                                          ---------  ---------  ---------  ---------  ---------
  Net loss..............................................  $  (8,890) $  (8,065) $  (8,910) $  (5,044) $  (2,746)
                                                          ---------  ---------  ---------  ---------  ---------
                                                          ---------  ---------  ---------  ---------  ---------
  Net loss per share (1)................................  $  (13.38) $   (1.57) $   (1.14) $   ( .63) $   ( .34)
                                                          ---------  ---------  ---------  ---------  ---------
                                                          ---------  ---------  ---------  ---------  ---------
  Weighted average common shares (1)....................        664      5,122      7,791      7,954      8,042
                                                          ---------  ---------  ---------  ---------  ---------
                                                          ---------  ---------  ---------  ---------  ---------
 
<CAPTION>
 
                                                                                MARCH 31,
                                                          -----------------------------------------------------
                                                            1992       1993       1994       1995       1996
                                                          ---------  ---------  ---------  ---------  ---------
                                                                             (IN THOUSANDS)
<S>                                                       <C>        <C>        <C>        <C>        <C>
BALANCE SHEET DATA:
  Cash, cash equivalents and restricted marketable
   securities...........................................  $   4,355  $  18,964  $  11,058  $   5,230  $   4,111
  Working capital.......................................      1,942     14,660      9,239      5,929      4,442
  Total assets..........................................      8,730     25,399     15,685     10,041      9,645
  Long-term liabilities.................................        650        361         54         44        810
  Accumulated deficit...................................    (24,898)   (32,962)   (41,872)   (46,916)   (49,662)
  Shareholders' equity..................................      4,264     21,991     13,412      8,513      5,982
</TABLE>
 
- --------------
(1)  See Note 1  of Notes to  Financial Statements for  an explanation of shares
    used in computing net loss per share.
 
(2) The Company's fiscal year is a 52- 53 week period ending on the last  Friday
    in  March.  All fiscal  years referenced  in this  Prospectus consist  of 52
    weeks, except fiscal 1995, which consisted of 53 weeks. For convenience, the
    Company has indicated in this Prospectus that its fiscal year ends on  March
    31.
 
                                       20
<PAGE>
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
    THE FOLLOWING DISCUSSION OF OPERATIONS AND FINANCIAL CONDITION OF CHOLESTECH
SHOULD  BE READ IN  CONJUNCTION WITH THE FINANCIAL  STATEMENTS AND NOTES THERETO
INCLUDED ELSEWHERE  IN THIS  PROSPECTUS. SPECIAL  NOTE: CERTAIN  STATEMENTS  SET
FORTH  BELOW CONSTITUTE "FORWARD-LOOKING  STATEMENTS" WITHIN THE  MEANING OF THE
REFORM ACT. SEE "SPECIAL  NOTE REGARDING FORWARD-LOOKING  STATEMENTS" ON PAGE  2
FOR ADDITIONAL FACTORS RELATING TO SUCH STATEMENTS.
 
GENERAL
 
    The  Company develops, manufactures and markets  a proprietary point of care
diagnostic system which  measures specific analytes  to detect various  diseases
and  disorders  within five  minutes using  a  single drop  of whole  blood. The
Company has experienced significant operating losses since inception and, as  of
March 31, 1996, had an accumulated deficit of $49.7 million. The Company has not
generated  significant  revenues to  date, and  there can  be no  assurance that
significant revenues will ever  be achieved. The  Company is developing  certain
additional tests designed to extend the L-D-X System's capabilities. The Company
believes  that  its future  growth will  depend,  in part,  upon its  ability to
complete development and  successfully introduce  these new  tests. The  Company
expects  to continue to  incur operating losses  as well as  negative cash flows
from operations as it expands product  research and development efforts for  new
test  panels,  pursues regulatory  clearances and  approvals, expands  sales and
marketing activities to address the monitoring market, and develops and  expands
manufacturing  capacity for  existing and new  test panels.  The development and
commercialization of the  new tests will  require additional development,  sales
and  marketing,  manufacturing and  other expenditures.  The required  level and
timing of  such  expenditures  will  impact the  Company's  ability  to  achieve
profitability and positive cash flows from operations.
 
RESULTS OF OPERATIONS
 
  YEARS ENDED MARCH 31, 1995 AND 1996
 
    REVENUES.   The Company's  revenues increased by 70.2%  from $4.0 million in
fiscal 1995 to $6.9 million in fiscal 1996. Domestic revenues increased by 72.2%
from $3.2  million  in  fiscal  1995  to  $5.6  million  in  fiscal  1996  while
international  revenues increased by 62.2% from  $817,000 in fiscal 1995 to $1.3
million in fiscal 1996. The increase in revenues reflected increased unit  sales
of   the  L-D-X  Analyzer   and  test  cassettes   to  hospitals,  managed  care
organizations, public  health departments,  corporations and  other health  care
providers  in the  screening market. The  Company's product sales  to the United
States monitoring market were minimal in  each fiscal year. The Company  expects
that  international revenues will  continue to decline as  a percentage of total
revenues in future periods as the Company increases sales and marketing  efforts
in the monitoring market in the United States.
 
    COSTS  OF PRODUCTS SOLD.   Costs of products sold  increased 14.5% from $3.9
million in fiscal  1995 to $4.5  million in fiscal  1996, as unit  sales of  the
L-D-X  Analyzer and test cassettes increased. Gross margin was 2.6% and 34.5% in
fiscal 1995 and  1996, respectively.  The improvement  in the  gross margin  was
primarily  attributable  to  improved  cassette  manufacturing  yields, improved
quality assurance procedures  and growth  in the  volume of  units sold.  During
fiscal  1995,  the Company  improved cassette  manufacturing yields  and quality
assurance procedures and  reduced staffing levels  by eliminating technical  and
engineering  positions specific to  initial product development  and scale-up of
manufacturing  capacity.  The  resulting  manufacturing  efficiencies  and  cost
reductions were reflected for the full year of fiscal 1996.
 
    RESEARCH  AND  DEVELOPMENT.    Research  and  development  expenses remained
constant between  fiscal 1995  and fiscal  1996  as a  result of  the  Company's
decision  to concentrate available resources on expansion of sales and marketing
activities for  existing test  panels. However,  the Company  believes that  its
future  revenue growth and profitability will  depend, in part, upon its ability
to complete development
 
                                       21
<PAGE>
and successfully introduce new test panels designed to extend the L-D-X System's
capabilities to include additional tests useful in the screening and  monitoring
markets.  The Company is currently developing additional tests to detect disease
states such  as  metabolic bone  diseases  and disorders,  prostate  cancer  and
diabetes.  Each of these new  tests is at an early  stage of development and the
Company will  be required  to undertake  time consuming  and costly  development
activities  and seek regulatory approval  for these new tests.  As a result, the
Company currently anticipates  that research and  development expenditures  will
increase   significantly   in  future   periods   as  product   development  and
manufacturing scale-up efforts for new tests increase.
 
    SALES AND MARKETING.  Sales and marketing expenses increased 17.6% from $2.7
million in fiscal 1995 to $3.2 million in fiscal 1996. The increase in sales and
marketing expenses  was primarily  attributable to  expansion of  the  Company's
domestic   direct  sales  and   marketing  organization,  increased  commissions
associated with increased product sales  and, to a lesser extent,  participation
in  domestic conferences and trade shows. The Company currently anticipates that
sales and marketing  expenses will  increase in  future periods  as the  Company
expands  sales and  marketing activities  to address  the monitoring  market, in
particular the POL segment of the monitoring market.
 
    GENERAL AND ADMINISTRATIVE.   General and administrative expenses  decreased
30.6%  from $2.0  million in  fiscal 1995  to $1.4  million in  fiscal 1996. The
decrease in  general  and administrative  expenses  was primarily  a  result  of
reduced  headcount and  reduced expenditures for  rent and  insurance. In fiscal
1995,  general  and  administrative  expenses  included  a  one-time  charge  of
approximately $114,000 as a result of headcount reductions. Absent such one-time
charge, general and administrative expenses for fiscal 1995 would have been $1.9
million.
 
    INTEREST INCOME (EXPENSE), NET.  Interest income was earned on investment of
cash  balances generated from  prior equity financings  of the Company. Interest
expense was incurred on  capital lease financings, the  bank line of credit  and
long-term debt obtained by the Company.
 
  YEARS ENDED MARCH 31, 1994 AND 1995
 
    REVENUES.  Revenues increased 33.3% from $3.0 million in fiscal 1994 to $4.0
million  in fiscal  year 1995.  Domestic revenues  increased by  74.6% from $1.8
million in  fiscal 1994  to $3.2  million in  fiscal 1995,  while  international
revenues  decreased by  31.1% from  $1.2 million in  fiscal 1994  to $817,000 in
fiscal 1995. The increase in domestic revenues reflected an increase in sales of
diagnostic tests to the domestic screening market. The decrease in international
revenues reflected the completion  in fiscal 1994  of the Company's  promotional
activities  with Warner  Lambert/Parke Davis  Corporation ("Warner  Lambert") in
Italy relating to Warner Lambert's hypolipidemic agent, Lopid.
 
    COSTS OF PRODUCTS SOLD.   Costs of products  sold decreased 20.9% from  $5.0
million in fiscal 1994 to $3.9 million in fiscal 1995. Costs of products sold as
a  percentage of total revenues decreased from 164.1% in fiscal 1994 to 97.4% in
fiscal 1995. The decrease was primarily attributable to the Company's successful
completion of  efforts  to improve  cassette  manufacturing yields  and  improve
quality  assurance procedures.  The improvements  in cassette  manufacturing and
quality assurance procedures enabled  the Company to  reduce staffing levels  by
eliminating  technical  and engineering  positions  specific to  initial product
development and expansion of the Company's manufacturing capacity.
 
    RESEARCH AND DEVELOPMENT.  Research and development expenses decreased 66.5%
from $2.1 million in  fiscal 1994 to  $715,000 in fiscal  1995. The decrease  in
research  and  development expenses  was primarily  a  result of  completing the
development of, and  obtaining FDA  approval for,  a TC/HDL/Glucose  test and  a
Lipid  Profile  plus Glucose  test and,  transitioning  to product  marketing in
fiscal 1995 from product  development in fiscal 1994.  The fiscal 1995  expenses
included  $715,000 for new product development  and product enhancements to meet
customer demands while fiscal 1994 expenses included $733,000 for  manufacturing
scale-up  costs and $1.4  million related to continued  development of the L-D-X
System and its related products.
 
    SALES AND MARKETING.  Sales and marketing expenses decreased 7.4% from  $2.9
million in fiscal 1994 to $2.7 million in fiscal 1995. The decrease in sales and
marketing expenses was a direct result of the
 
                                       22
<PAGE>
Company's efforts to improve efficiency. During fiscal 1995, the Company focused
on  increasing  domestic  product sales  while  selectively  targeting potential
sources of  international product  sales. The  strategy allowed  the Company  to
reduce  sales  and  marketing expenses  in  fiscal 1995  although  product sales
increased.
 
    GENERAL AND ADMINISTRATIVE  EXPENSES.  General  and administrative  expenses
decreased 13.3% from $2.3 million in fiscal 1994 to $2.0 million in fiscal 1995.
General  and administrative expenses for fiscal  1995 included a one-time charge
of approximately $114,000  due to a  reduction in the  number of  administrative
personnel.  Absent such one-time charge, general and administrative expenses for
fiscal 1995  would  have been  $1,869,000.  In addition,  fiscal  1994  expenses
included  a net gain of $290,000 upon  the settlement of a dispute in connection
with a licensing  agreement. Absent  such net gain,  general and  administrative
expenses  for fiscal 1994  would have been $2.6  million. After consideration of
the net gain and one-time charge, actual general and administrative expenses for
fiscal 1995  decreased  approximately $709,000  or  28% from  fiscal  1994.  The
decrease  resulted  from the  Company's efforts  to  control costs  and conserve
resources through reduced headcount and improved operating efficiency.
 
    INTEREST INCOME (EXPENSE), NET.  Interest income was earned on investment of
cash balances generated from equity financings of the Company. Interest  expense
was incurred on capital lease financings obtained by the Company.
 
  INCOME TAX CARRYFORWARDS
 
    As  of  March 31,  1996, the  Company had  net operating  loss carryforwards
available to reduce taxable income through 2011 for federal and state income tax
purposes  of  approximately  $46.0  million  and  $21.0  million,  respectively.
Additionally,  the  Company had  research  and development  credit carryforwards
available to reduce income taxes through  2011 for federal and state income  tax
purposes  of approximately $1.5 million and  $493,000, respectively. There is an
annual limitation of approximately $1.5 million for federal and state income tax
reporting purposes on the use of approximately $8.1 million and $1.1 million  of
net  operating losses, and of $390,000 and $160,000 of tax credit carryforwards,
respectively. The Company's  net operating losses  and tax credit  carryforwards
incurred  prior  to  December  1992  are  subject  to  an  annual  limitation of
approximately $5.5 million for federal  and state income tax reporting  purposes
on the use of approximately $28.2 million and $8.1 million of net operating loss
carryforwards,  respectively, and  of $1.2  million and  $379,000 of  tax credit
carryforwards, respectively. If the amount of these limitations are not utilized
in any  year, the  amount not  utilized  increases the  allowable limit  in  the
subsequent year.
 
  IMPACT OF ADOPTION OF NEW ACCOUNTING STANDARDS
 
    In  March 1995, the Financial Accounting Standards Board issued Statement of
Financial Accounting  Standards  No.  121  "Accounting  for  the  Impairment  of
Long-Lived  Assets and  for Long-Lived  Assets to  Be Disposed  Of," ("FAS 121")
which requires the Company to  review for impairment long-lived assets,  certain
identifiable intangibles and goodwill related to those assets whenever events or
changes in circumstances indicate that the carrying amount of an asset might not
be  recoverable. In certain situations, an  impairment loss would be recognized.
The Company will  adopt FAS 121  during fiscal  1997 and, based  on its  initial
evaluation,  does  not expect  its adoption  to  have a  material impact  on the
Company's financial condition or results of operations.
 
    In October 1995, the Financial  Accounting Standards Board issued  Statement
of   Financial  Accounting   Standards  No.  123   "Accounting  for  Stock-Based
Compensation" ("FAS  123")  which  established  a fair  value  based  method  of
accounting   for   stock-based  compensation   plans  and   requires  additional
disclosures for  those  companies who  elect  not to  adopt  the new  method  of
accounting.  The  Company will  adopt FAS  123 during  fiscal 1997.  The Company
intends to continue to  account for employee stock  options using the  intrinsic
value method prescribed by APB Opinion No. 25 and to adopt the "disclosure only"
pro forma alternative described in FAS 123.
 
                                       23
<PAGE>
  POTENTIAL FLUCTUATIONS IN QUARTERLY RESULTS
 
    The  Company may experience significant fluctuations in revenues and results
of operations on a quarter to  quarter basis in the future. Quarterly  operating
results  will fluctuate due to numerous  factors, including the timing and level
of market acceptance of the L-D-X System, particularly with respect to POLs, the
timing of introduction and  availability of new tests,  the timing and level  of
expenditures  associated with new product development activities, the timing and
level of expenditure associated with expansion of sales and marketing activities
and  overall  operations,  the  Company's  ability  to  cost-effectively  expand
cassette  manufacturing capacity and maintain  consistently acceptable yields in
the  manufacture  of  cassettes,  the  timing  of  establishment  of   strategic
distribution  arrangements and  success of  the activities  conducted under such
arrangements, variations in  manufacturing efficiencies, changes  in demand  for
its products based on changes in third party reimbursement, competition, changes
in  government regulation  and other factors,  the timing  of significant orders
from and shipments to customers, and general economic conditions. These  factors
are  difficult to  forecast, and  these or other  factors could  have a material
adverse effect on  the Company's  business, financial condition  and results  of
operations.   Fluctuations   in  quarterly   demand   for  products   and  order
cancellations may adversely affect the continuity of the Company's manufacturing
operations, increase uncertainty in operational planning, disrupt cash flow from
operations and contribute to  the volatility of the  Company's stock price.  The
Company's  expenses are based in part on the Company's expectations as to future
revenue levels and  to a large  extent are  fixed in the  short-term. If  actual
revenues  do not meet expectations,  the Company's business, financial condition
and results of operations could be materially adversely affected.
 
LIQUIDITY AND CAPITAL RESOURCES
 
    The Company has financed its operations primarily through the sale of equity
securities and, to a lesser extent, through capital lease financings and a  long
term   note  payable.  Through   March  31,  1996,   the  Company  had  received
approximately $54.9 million in net proceeds from equity financings. As of  March
31,  1996, the Company had approximately  $361,000 of cash and cash equivalents.
In addition, the Company had  $3.75 million of restricted marketable  securities
that  currently secure a $3.0  million revolving bank line  of credit. While the
line of credit is in effect, the Company is required to maintain on deposit with
the bank $3.75  million of restricted  marketable securities or  a $3.0  million
certificate  of deposit  as pledged  collateral, restricted  as to  use when the
Company has  outstanding borrowings  under  the agreement.  The line  of  credit
expires  on October 31, 1996. As of March 31, 1996, borrowings under the line of
credit totaled  $250,000.  If  the  Company's  cash  and  restricted  marketable
securities  were to fall  below $3.0 million,  the Company would  be required to
either renegotiate the terms  or cancel the revolving  line of credit. At  March
31,  1996, the Company  also had approximately $1.3  million outstanding under a
long term note. The note contains various provisions including requirements that
the Company maintain  at least $3.0  million in cash  and restricted  marketable
securities  and a  security deposit  in the  amount of  $150,000 payable  to the
lender in  the event  of  a default  on  the note.  If  the Company's  cash  and
restricted  marketable securities were  to fall below  $3.0 million, the Company
would be  required  to deposit  with  the lender  an  additional $200,000  as  a
security deposit.
 
    Net  cash used in operating activities  was approximately $7.2 million, $5.0
million and $2.4 million in fiscal 1994, 1995 and 1996, respectively. Cash  used
in operating activities resulted primarily from net losses. Net cash provided by
investing  activities  in  fiscal  1995 resulted  primarily  from  the  sales of
marketable securities. During fiscal 1996, net cash used in investing activities
reflected the Company's purchases  of property and equipment.  Net cash used  in
financing  activities in  fiscal 1995 reflected  the repayment  of capital lease
obligations, while the net cash provided by financing activities in fiscal  1996
reflected  approximately  $1.7  million in  net  proceeds from  a  note payable,
borrowing under the line of credit and issuances of Common Stock.
 
    The Company intends  to expend  substantial funds for  product research  and
development,   expansion  of  sales  and   marketing  activities,  expansion  of
manufacturing capacity and other working capital and general corporate purposes.
Although  the  Company  believes  that   the  net  proceeds  of  the   Offering,
 
                                       24
<PAGE>
together  with its unrestricted cash  balances, internally generated funds, bank
borrowings under existing lines of credit and proceeds from issuances of  Common
Stock  to Metra Biosystems  will be sufficient to  meet its capital requirements
for the foreseeable future, there can be no assurance that the Company will  not
require  additional  financing.  The  Company's  actual  liquidity  and  capital
requirements will depend upon numerous  additional factors, including the  costs
and  timing of expansion of  manufacturing capacity, the number  and type of new
tests the Company seeks to develop, the  costs and timing of expansion of  sales
and  marketing activities,  the extent to  which the Company's  existing and new
products  gain   market   acceptance,   competing   technological   and   market
developments,  the  progress  of  commercialization  efforts  of  the  Company's
distributors, the costs involved in preparing, filing, prosecuting,  maintaining
and enforcing patent claims and other intellectual property rights, developments
related  to regulatory and third party reimbursement matters and CLIA, and other
factors. In the event that additional financing is needed, the Company may  seek
to  raise additional  funds through  public or  private financing, collaborative
relationships or  other arrangements.  Any additional  equity financing  may  be
dilutive  to  shareholders,  and  debt  financing,  if  available,  may  involve
restrictive  covenants.  Collaborative  arrangements,  if  necessary  to   raise
additional funds, may require the Company to relinquish its rights to certain of
its  technologies, products or marketing territories. The failure of the Company
to raise  capital  when needed  could  have a  material  adverse effect  on  the
Company's  business, financial condition and results of operations. There can be
no assurance that such financing, if required, will be available on satisfactory
terms, if at all.
 
                                       25
<PAGE>
                                    BUSINESS
 
GENERAL
 
    Cholestech develops, manufactures  and markets a  proprietary point of  care
diagnostic  system which measures  specific analytes to  detect various diseases
and disorders  within five  minutes using  a  single drop  of whole  blood.  The
Company  currently markets its L-D-X-  System and a series  of lipid and glucose
panels for preventive  screening and monitoring  applications. In January  1996,
the L-D-X System and the Company's TC, HDL, triglycerides and glucose tests were
granted  waived status  under CLIA, the  first such waiver  granted under CLIA's
newly-developed ease of use, accuracy and precision guidelines. The CLIA  waiver
allows  health care  providers to  use the  L-D-X System  without the additional
operating costs  and  extensive  regulatory requirements  associated  with  CLIA
compliance.   The  Company  believes   that  the  L-D-X-   System  is  the  only
multi-analyte diagnostic  system to  be  classified as  waived under  CLIA.  The
Company  believes  that the  L-D-X  System's CLIA  waived  status, technological
flexibility, ease of  use, accuracy and  low maintenance costs  provide it  with
competitive advantages over other point of care diagnostic systems.
 
MARKET OVERVIEW
 
    Diagnostic  testing of blood for chronic diseases and disorders is typically
performed in independent  clinical laboratories  or hospital-based  laboratories
where  large numbers of blood samples are  processed in batches and test results
are often not returned to physicians in less than 24 hours. The Company believes
that as a  result of  the potential  benefits and  advantages of  point of  care
testing  ,  there exists  an opportunity  to shift  certain types  of diagnositc
testing from clinical laboratories and hospital-based laboratories to the  point
of  care. These potential benefits and  advantages include permitting the health
care practitioner  to provide  immediate  feedback to  the  patient as  well  as
allowing   health  care   practitioners  to  closely   monitor  the  therapeutic
effectiveness of treatment and thereby  improve patient compliance. The  Company
also  believes that point of care testing  could help to reduce overall delivery
costs and could improve patient outcomes by providing diagnosis as close to  the
patient  as  possible,  thereby  eliminating  the  need  for  additional patient
follow-up with  test results  and redundant  and time  consuming procedures  and
processes, reducing paperwork and minimizing the time to medical intervention.
 
    Two of the principal markets in which point of care testing is performed are
the  screening  and  monitoring  markets.  The  screening  market  is  generally
comprised of hospitals,  corporate wellness programs,  health promotion  service
providers,  managed care organizations, community  health centers, public health
programs, fitness centers, the military  and other independent screeners.  These
health  care providers  focus on  identifying patients  who may  be at  risk for
certain diseases or disorders and  directing them to appropriate therapeutic  or
preventive  care programs. The monitoring market is generally comprised of POLs,
lipid clinics, cardiac rehabilitation centers and pharmacies. These health  care
providers  focus  on  disease  management and  perform  testing  to  monitor (i)
patients who are identified  as at risk for  certain diseases, (ii) patients  on
dietary  or drug therapy, and  (iii) patients at risk  of, or who have suffered,
heart attacks or who  are in cardiac rehabilitation.  The Company believes  that
the  number of potential point of care  testing sites is large. For example, the
National Cholesterol Education Program  ("NCEP") and American Heart  Association
have  encouraged  cholesterol testing  in  such places  as  worksites, community
health centers and a  variety of preventive medicine  programs in order to  make
such  testing readily available. Until recently,  point of care testing has been
conducted predominately in  the high volume  screening and monitoring  settings.
Point  of care testing in the monitoring  market has been embraced by low volume
POLs only  on  a limited  basis  due to  the  costs and  administrative  burdens
associated  with government regulatory  requirements. In addition, technological
limitations have restricted  the number  of tests  which can  be performed  cost
effectively at the point of care.
 
    Historically, the Federal Clinical Laboratory Improvement Amendments of 1967
applied  only to clinical  and hospital-based laboratories,  and physicians were
able to perform any  laboratory testing that they  believed was appropriate  for
their  patients.  The  POL  market  grew  as  a  result  of  the  development of
 
                                       26
<PAGE>
easy to  use  laboratory  testing  equipment and  the  economic  incentives  for
physicians to perform such testing in their own offices. In 1988, the regulatory
environment  in  the POL  market  changed with  the  promulgation of  CLIA which
applies to  all laboratories,  including POLs,  which perform  testing on  human
specimens.  Under CLIA, all laboratories are required to register with HCFA, but
laboratories conducting non-waived tests must  pay higher registration fees  and
submit to biannual federal inspections. Laboratories conducting non-waived tests
are  also required to implement a comprehensive quality assurance program, which
includes a  detailed  procedure  manual, enrollment  in  a  proficiency  testing
program and a requirement to run two levels of quality control material each day
of  testing, even if only one patient  sample is run. Moreover, CLIA regulations
include personnel requirements that  vary depending on  the complexity of  tests
performed.  See "-- Government  Regulation." Since POL testing  is often done in
low volumes  and  CLIA requirements  can  significantly increase  the  costs  of
testing,  performing  non-waived tests  in a  POL  setting, particularly  in low
volume POLs, is often not cost effective. When CLIA regulations went into effect
in 1992,  many physicians  discontinued  all but  waived testing.  Clinical  and
hospital-based laboratories, however, have continued to perform such testing and
as a result currently dominate this market.
 
  SCREENING MARKET
 
    In   the  screening  market,  health  care  providers  perform  high  volume
preventive risk  factor screening,  particularly  for cholesterol  and  glucose.
Although  not subject to reimbursement by  Medicare or other third party payors,
risk factor screening has proven to be an effective way to decrease the  overall
cost of medical care. Hospitals and health departments offer health screening in
local  communities. Many  corporations offer periodic  cholesterol screenings to
their employees at the worksite as  part of worksite health promotion  programs.
Of  those  companies providing  cholesterol  screenings, approximately  30% also
measure glucose. Worksite health promotion  is advocated by government  agencies
such as the National Heart, Lung and Blood Institute and the Centers for Disease
Control  and  Prevention  ("CDC"). In  addition,  private  organizations promote
worksite health promotion with a variety of programs such as the American  Heart
Association's   "Heart  at  Work"  Program  and  the  YMCA's  "Corporate  Health
Enhancement Program," which  serves more  than 2,000  worksites nationally.  The
Public  Health  Service  has set  goals  for  the number  of  worksites offering
cholesterol education and testing to be increased from 16% in 1983 to 50% by the
year 2000. Due to the high volume of testing performed by health care  providers
in  the screening market, the adoption of  CLIA and its resulting cost increases
and administrative burdens did not have a significant negative impact on testing
in the screening market. Since  CLIA went into effect  in 1992, the Company  has
focused its sales and marketing efforts on the distribution of its products into
the various segments of the screening market.
 
  MONITORING MARKET
 
    Since  the Company  received notice  from the CDC  in January  1996 that the
L-D-X System and the TC, HDL, triglycerides and glucose tests in any combination
have been classified as  waived under CLIA, the  Company has expanded its  sales
and  marketing focus to include the monitoring market, in particular the POL and
pharmacy segments. There are currently 54,000 POLs which perform different types
of diagnostic tests. The Company currently offers four of the eight most  common
blood  chemistry  tests  performed  at POLs,  with  two  additional  tests under
development. In  addition, there  are currently  68,000 pharmacies  which  could
potentially  offer point  of care testing.  The Company believes  that long term
success in the pharmacy market will be dependent upon the development of patient
monitoring programs developed  by pharmacies and  implemented with managed  care
practitioners and physicians on a local basis.
 
                                       27
<PAGE>
STRATEGY
 
    The Company's business strategy includes the following elements:
 
    - LEVERAGE  CORE  TECHNOLOGIES  TO ENHANCE  PRODUCT  OFFERINGS.  The Company
      intends to leverage the technological  flexibility of the L-D-X System  by
      developing new test cassettes which utilize the existing L-D-X Analyzer in
      order  to capitalize  on the Company's  installed based  of instruments as
      well as to  make the L-D-X  System more attractive  to new customers.  The
      Company  is currently  in various  stages of  development of  new products
      which utilize  biological markers  for  screening and  monitoring  certain
      common  diseases, such as metabolic  bone diseases and disorders, prostate
      cancer and diabetes. In addition, the Company is developing new tests  for
      blood  urea nitrogen, uric acid and creatinine for renal function analysis
      and liver enzymes for hepatic damage.
 
    - INCREASE PENETRATION  OF  SCREENING  MARKET  AND  EXPAND  INTO  MONITORING
      MARKET.  The Company believes that the  CLIA waived status of its products
      will increase the number of  potential customers in the screening  market,
      and  will enable the Company to  access the monitoring market. The Company
      is currently  developing  new  products  to make  its  product  line  more
      attractive  to the POL  market as well  as to expand  its screening market
      offerings.
 
    - EXPAND DISTRIBUTION CHANNELS.  The Company intends  to augment its  direct
      sales  and marketing efforts by continuing to establish relationships with
      selected third party distributors to strategically access target  markets.
      The  Company has recently entered into  a distribution agreement with PSS,
      one of the largest medical products distributors in the United States,  to
      sell the L-D-X System to the POL market.
 
    - ESTABLISH STRATEGIC RELATIONSHIPS. The Company has established and intends
      to  continue to establish strategic  relationships to develop new products
      and  to  expand  its  customer  base.  The  Company  believes  that   such
      relationships will enable it to take advantage of the financial resources,
      technological  capabilities and market presence of its partners to enhance
      its competitive  position in  the  screening market  and expand  into  the
      monitoring  market. In May  1996, the Company  entered into a development,
      marketing and  licensing agreement  with Metra  Biosystems to  develop  an
      immunoassay  test cassette incorporating Metra Biosystems' bone resorption
      technology to  be  used  with  the  L-D-X  System.  The  Company  is  also
      participating   in  a  pilot  program  with  the  American  Pharmaceutical
      Association funded by Merck & Co. ("Merck") to demonstrate the ability  of
      pharmacists  to improve  patient outcomes  with drug  therapy and behavior
      modification.
 
TECHNOLOGY
 
    The L-D-X  System is  a  self-contained, easy  to  use package  of  products
consisting  of  a  versatile,  telephone-sized electronic  analyzer,  a  line of
disposable test  cassettes,  and  accessories  that enable  a  user  to  perform
combinations  of blood tests in  five minutes or less.  Although no special user
training is needed  and the test  sample does  not need to  be pre-treated,  the
Cholestech  L-D-X System produces  results that are  comparable to the precision
and  accuracy  typically  seen   in  larger,  more   expensive  bench  top   and
laboratory-based analyzers. Correlation studies of the L-D-X System and clinical
laboratory  analyzers have shown that the L-D-X System meets NCEP guidelines for
precision and accuracy. In addition, the ease of use and precision and  accuracy
of  the L-D-X  System were  factors necessary  for the  L-D-X System  to receive
waived status under CLIA. The Company believes that it is the only  manufacturer
with a CLIA waived multi-analyte diagnostic system.
 
    The  Company believes the  L-D-X System provides  the following benefits and
advantages:
 
    - FLEXIBILITY OF L-D-X SYSTEM. The  design of the L-D-X System  incorporates
      as much of the system's technology as possible into the test cassettes and
      maintains  the L-D-X Analyzer  as a flexible measuring  device that can be
      adapted   as    new    tests    and    other    product    upgrades    are
 
                                       28
<PAGE>
      introduced. As new tests are marketed, encoding on the cassette's magnetic
      stripe  communicates the product change to the L-D-X Analyzer and provides
      the L-D-X Analyzer the information needed to measure and display the  test
      results. Changes that cannot be captured on the cassette's magnetic stripe
      can  be accomplished by software changes in the L-D-X Analyzer's removable
      read only memory ("ROM") pack. This flexible design is intended to  permit
      the  installed base  of users to  incorporate new tests  and other product
      upgrades to the L-D-X System without having to purchase a new analyzer.
 
    - COST EFFECTIVENESS.  The  Company believes  that  point of  care  specimen
      analysis  made possible by  the L-D-X System may  provide savings to third
      party payors and physicians. Point of care testing allows the health  care
      practitioner   to  provide  immediate  results  to  the  patient,  thereby
      increasing the possibility for  improved patient outcomes and  eliminating
      the  requirement  that  the patient  return  to receive  test  results. In
      addition, the Company believes that the L-D-X System's waived status under
      CLIA,  together  with  prevailing  third  party  reimbursement  rates  and
      recommended  fees, may provide a financial  incentive for many health care
      providers to test patients at the point of care and capture revenue rather
      than forwarding it to the clinical laboratory.
 
    - IMMEDIATE RESULTS. The L-D-X System provides the health care  practitioner
      with  results in approximately five  minutes, allowing for immediate point
      of care risk factor analysis,  diagnosis and monitoring. The immediacy  of
      the  test results  allows the practitioner  to begin  treatment during the
      same visit, perform additional  tests if needed  or select an  alternative
      treatment.  The L-D-X System's  ability to provide  immediate test results
      also improves the usefulness of  screening applications, such as  worksite
      testing programs.
 
    - SIMULTANEOUS  PERFORMANCE  OF MULTIPLE  TESTS.  With the  L-D-X  System, a
      single cassette can perform up to four tests simultaneously, enabling  the
      Company  to develop test cassettes that meet specific market needs. In the
      monitoring market,  the  performance  of  multiple  tests  with  a  single
      cassette may also result in more reimbursement revenue for the physician.
 
    - EASE  OF USE.  The L-D-X System  requires no special  medical or chemistry
      training to operate and obtain test results. In addition, the L-D-X System
      eliminates the need to pre-treat the testing sample.
 
    - FEWER OPPORTUNITIES FOR  ERROR. The  L-D-X System eliminates  many of  the
      steps   traditionally   involved  in   blood  testing,   including  sample
      transportation, preparation  and storage,  and interpretation  of  analyte
      color  reactions,  thereby  reducing  opportunities  for  human  error and
      preserving the integrity of the sample.
 
  L-D-X ANALYZER
 
    The L-D-X Analyzer is a  four-channel, reflectance photometer that  measures
the  amount of  light reflected  from the  reaction surfaces  and incorporates a
microprocessor with  on board  software. The  L-D-X Analyzer  contains an  entry
drawer  for insertion of the  cassette, three buttons for  user activation and a
liquid crystal display to present the test measurements. The L-D-X Analyzer  can
also  transmit results to a printer or laboratory management computer system for
data handling  and record  keeping.  The L-D-X  Analyzer includes  cardiac  risk
assessment  software that allows the health care practitioner to perform cardiac
risk assessment  using TC  and  HDL test  results  and information  about  other
cardiac  risk  factors  the  health  care  practitioner  enters  into  the L-D-X
Analyzer.
 
    To run a  test, the health  care provider  presses the "run"  button on  the
L-D-X  Analyzer to open the  cassette drawer, applies the  sample of whole blood
directly to  the test  cassette's sample  well, inserts  the cassette  onto  the
drawer and presses the run button again. All further steps are done by the L-D-X
Analyzer.  Utilizing the information and  instructions encoded on the cassette's
magnetic stripe,  the  L-D-X Analyzer's  on  board microprocessor  controls  the
reaction conditions, controls the optical measurements of analyte concentrations
on  the cassette's reaction pads, executes the required calculations and, within
approximately five  minutes, displays  the quantitative  results on  the  liquid
crystal display.
 
                                       29
<PAGE>
    The  ROM software  that instructs  and controls  the operation  of the L-D-X
Analyzer's on board microprocessor is contained in a removable ROM pack  mounted
in  an access well on  the bottom of the L-D-X  Analyzer. The Company intends to
upgrade the software in  its ROM pack  as the Company  develops new products.  A
user  can then easily  remove the ROM  pack and replace  it with a  new ROM pack
containing upgraded  software.  To  date,  the Company  has  made  available  to
existing  users  a new  ROM pack,  without charge,  containing the  cardiac risk
assessment software described  above, as  well as  a new  ROM pack,  for a  fee,
reflecting certain changes required to receive the CLIA waiver.
 
  DISPOSABLE TEST CASSETTES
 
    The focal point of the L-D-X System is the line of disposable test cassettes
which  incorporate  patented  technology, including  a  method  for distributing
precisely measured plasma  to multiple  reaction pads  for simultaneous  testing
along  with the  technology to  instruct the L-D-X  Analyzer how  to perform the
tests and all related calculations.
 
    Each cassette consists of three parts: a main body that contains the  sample
well  into which the blood  sample is dispensed, a  reaction bar where plasma is
transferred for analysis, and a  magnetic stripe encoded with test  instructions
and  lot specific  calibration information  for the  various chemistries  on the
reaction pads. Capillary action draws a drop of whole blood through a separation
medium within a cassette,  stopping the cellular components  of the blood  while
transferring  a small volume of plasma to the cassette's reaction pads. When the
plasma contacts the reaction pads, the dry chemistry on the reaction pads reacts
with the  analyte(s) in  the  plasma producing  color.  The intensity  of  color
developed  is proportional to the concentration of the analyte(s) in the plasma.
The magnetic stripe contains information needed by the L-D-X Analyzer to convert
the reflected  color  reading  into  a  concentration  level  for  the  accurate
measurement of analytes being tested. This feature frees the user from having to
interpret  any color reaction, relate a reading to a separate chart or input any
calibration information.
 
    For certain future tests, the Company will be required to modify the  design
of  the existing dry chemistry cassette.  For example, the Company's immunoassay
tests currently under  development require the  use of antibodies  bound to  the
reaction  membrane  and a  wash step  which removes  bound reactants  that would
interfere with the test. The new immunoassay cassette under development has  the
same  external dimensions as the currently available dry chemistry cassette, but
will require the  Company to  develop new technologies  that would  allow it  to
perform  an immunoassay test,  of which there  can be no  assurance. The Company
believes that, if the immunoassay cassette is successfully developed, the  L-D-X
Analyzer  will be the  only instrument capable of  performing both dry chemistry
and immunoassay-based tests on a single instrument. See "-- Products -- Products
Under Development."
 
                                       30
<PAGE>
PRODUCTS
 
    The Company's current products  include the L-D-X Analyzer  and a series  of
lipid  and glucose test  cassettes for the screening  and monitoring markets. In
addition, the Company is in  the process of developing  new tests to expand  its
product  menu, including immunoassay-based test  cassettes to provide preventive
monitoring assays for the detection of metabolic bone diseases and disorders and
prostate cancer. The following table  summarizes the Company's current  cassette
products and products under development:
 
<TABLE>
<CAPTION>
      L-D-X TEST               APPLICATION         TEST TYPE          STATUS (1)
- -----------------------  -----------------------  ------------  -----------------------
CURRENT PRODUCTS
<S>                      <C>                      <C>           <C>
TC                            Cardiac Risk            Dry       Marketed; FDA cleared;
                                                   Chemistry          CLIA waived
TC and HDL                    Cardiac Risk            Dry       Marketed; FDA cleared;
                                                   Chemistry          CLIA waived
Lipid Profile (TC/HDL/        Cardiac Risk            Dry       Marketed; FDA cleared;
 Triglycerides)                                    Chemistry          CLIA waived
TC and Glucose           Cardiac & Diabetes Risk      Dry       Marketed; FDA cleared;
                                                   Chemistry          CLIA waived
TC/HDL/Glucose           Cardiac & Diabetes Risk      Dry       Marketed; FDA cleared;
                                                   Chemistry          CLIA waived
Lipid Profile plus       Cardiac & Diabetes Risk      Dry       Marketed; FDA cleared;
 Glucose                                           Chemistry          CLIA waived
 
PRODUCTS UNDER
 DEVELOPMENT
Bone Markers                  Osteoporosis        Immunoassay       Prototype Stage
Uric Acid                    Renal Function           Dry         Feasibility Studies
                                                   Chemistry
Blood Urea Nitrogen          Renal Function           Dry         Feasibility Studies
                                                   Chemistry
Creatinine                   Renal Function           Dry         Feasibility Studies
                                                   Chemistry
Prostate Specific           Prostate Disease      Immunoassay     Feasibility Studies
 Antigen
Glycated Hemoglobin             Diabetes            Specific      Feasibility Studies
                                                    Binding
</TABLE>
 
 --------------------------
 (1) "Marketed" means that commercial sales of the product have commenced. "FDA
     cleared"  means that  the product has  received 510(k)  clearance from the
     FDA. "CLIA waived" means  that the product has  been classified as  waived
     under  CLIA by  the CDC.  "Feasibility studies"  means that  a theoretical
     design for the product has been developed and the test chemistry is  being
     evaluated  in the laboratory. "Prototype  stage" means cassette shelf-life
     is being evaluated, pilot manufacturing equipment is being developed,  and
     the new test is being evaluated in-house against samples designed to mimic
     the range of real patient samples.
 
  CURRENT PRODUCTS
 
    The  Company's current  products are designed  to measure  and monitor blood
cholesterol and related lipids  and glucose. Lipids travel  in the blood  within
water-soluble  particles called lipoproteins. These  lipid carriers include VLDL
(very-low-density lipoproteins), LDL  (low-density lipoproteins)  and HDL  (high
density  lipoproteins). VLDL, a major carrier of triglycerides in the blood, and
LDL, the major  carrier of cholesterol,  have been shown  to be associated  with
deposits   on  the   arterial  wall,   which  are   sometimes  referred   to  as
atherosclerotic plaque. The accumulation of this plaque leads to a narrowing  of
the arteries and increases the likelihood of coronary heart disease, the leading
cause of death in the United States. HDL particles, which circulate in the blood
and  can  pick  up cholesterol  from  arteries and  carry  it to  the  liver for
elimination from  the  body, counterbalance  this  mechanism. HDL  is  sometimes
called  "good cholesterol" because of this function. The development of coronary
heart disease has been associated with three lipoprotein abnormalities: (i) high
levels of LDL; (ii) high levels of VLDL; and (iii) low levels of HDL.
 
                                       31
<PAGE>
    Recognizing the  relationship between  diabetes and  dyslipidemia  (abnormal
lipid  levels),  Cholestech  developed  a glucose  test  for  the  L-D-X System.
Diabetes is a complex disorder of  carbohydrate, fat and protein metabolism.  It
is  manifested by a relative or absolute deficiency in insulin, the hormone that
facilitates and  controls  the  use of  glucose  by  the body.  Because  of  the
deficiency  of insulin, diabetic patients have an impaired tolerance to glucose,
which leads to a number of short term and long term complications, such as nerve
damage, kidney disease and retinal damage.
 
    The Company's  L-D-X  System  includes the  L-D-X  Analyzer  which  measures
analyte  concentrations  on  the  test cassette  and  displays  the quantitative
results. The L-D-X Analyzer currently has a list price of $1,795. A  description
of the Company's test cassettes is provided below.
 
    TC.    A stand  alone  test for  measuring  total cholesterol.  The  TC test
currently has a list price of $2.95.
 
    TC AND HDL PANEL.  The total cholesterol and HDL cholesterol panel  provides
results  for TC  and HDL  and calculates the  ratio of  TC to  HDL, a recognized
measure of lipid-induced cardiac risk. The Company believes that the TC and  HDL
Panel  is the only  currently available point  of care test  which, using only a
single drop  of  whole  blood  from a  simple  fingerstick,  addresses  the  NIH
guidelines  regarding  the  evaluation  of coronary  heart  disease  through the
testing of not only TC, but also  the important HDL component. As a result,  the
Company  believes  the TC  and  HDL Panel  is  particularly useful  in corporate
wellness and initial screening applications. The TC and HDL Panel currently  has
a list price of $7.50.
 
    LIPID  PROFILE.  The Company offers  a Lipid Profile which directly measures
TC, HDL and triglycerides. In addition  to providing direct results for TC,  HDL
and  triglycerides, the  Lipid Profile calculates  estimated values  for LDL and
VLDL and calculates the  ratio of TC  to HDL. The  Lipid Profile thus  performs,
using  a  small sample  of  whole blood  from  a simple  fingerstick,  each test
identified by  the NIH  guidelines as  important in  the diagnosis  and  ongoing
monitoring  of individuals who  have high TC  levels or who  exhibit two or more
other coronary heart  disease risk factors.  The Lipid Profile  also allows  the
health  care practitioner  to follow the  NIH guidelines to  perform three lipid
profiles, each one week apart, prior to initiating drug or dietary therapy.  The
Lipid Profile currently has a list price of $9.95.
 
    TC   AND  GLUCOSE  PANEL,  TC/HDL/GLUCOSE   PANEL  AND  LIPID  PROFILE  PLUS
GLUCOSE.  These panels  address the need for  screening and monitoring  patients
with  demonstrated or incipient diabetes mellitus  and individuals who may be at
risk of cardiovascular disease  and individuals who may  not be aware that  they
are  diabetic. These test combinations are potentially desirable because glucose
and TC tests are frequently conducted  at occupational health sites. The TC  and
Glucose  Panel, the TC/HDL/Glucose Panel and the Lipid Profile plus Glucose have
a list price of $3.95, $8.50 and $10.95, respectively.
 
    MARKETS.   In response  to conclusive  evidence relating  high TC  to  heart
disease,  the NIH in 1985  launched the NCEP, a  nationwide effort to reduce the
prevalence of high blood  cholesterol. In 1988, the  NCEP issued guidelines  for
the  testing of all adults over 20 years  of age for high blood cholesterol, and
more extensive lipid monitoring and treatment for those found to be in high risk
categories. Testing guidelines  were subsequently expanded  to include  children
over  the age of two with a family history of high blood cholesterol or coronary
heart  disease  and  to  include  in  certain  circumstances  a  lipid  profile,
consisting  of  TC, HDL,  LDL and  triglycerides. Since  the NCEP  initiated its
recommendations,  the  market  for  cholesterol   and  other  lipid  tests   has
experienced  significant growth.  NCEP data indicate  that more than  50% of the
adult population in the United States has high or borderline high TC.
 
    It is estimated that Type II diabetes, which involves insulin deficiency  or
insulin  resistance, afflicts more than 14 million persons in the United States,
but only half of those with Type II diabetes have been identified. Screening for
these patients who  have non-symptomatic diabetes  is important, because  proper
treatment will minimize the long term complications of the disease.
 
  PRODUCTS UNDER DEVELOPMENT
 
    The  Company's strategy is to use the technological flexibility of the L-D-X
System to develop new cassettes that address disease states and testing  markets
the Company believes provide attractive
 
                                       32
<PAGE>
commercial  opportunities. The Company is in  the early stages of developing new
cassettes that would expand its product  line in the screening market and  would
better  position its product line  for the POL market.  To date, the Company has
been engaged primarily in conducting  research and development to determine  the
feasibility  of performing these new tests on the L-D-X System. The Company will
initially focus its available resources on  the development of uric acid,  blood
urea   nitrogen,   creatinine  and   liver  enzyme   tests,   as  well   as  the
immunoassay-based test  to  detect  and  monitor  metabolic  bone  diseases  and
disorders being developed in conjunction with Metra Biosystems. The Company will
undertake  the development of additional tests  depending on the progress of its
existing development  efforts  and  its available  resources.  To  complete  its
product development programs, particularly with respect to the immunoassays, the
Company  may  be  required  to  develop  new  core  technologies,  processes and
production equipment. In addition,  the Company may also  be required to  retain
additional  scientific,  engineering and  manufacturing staff.  There can  be no
assurance that the  Company will be  successful in developing  any of the  tests
described below, or even if successfully developed, that such tests will receive
regulatory  clearance,  be capable  of  being cost  effectively  manufactured in
sufficient quantities,  on a  timely  basis and  in compliance  with  regulatory
guidelines,  or  be successfully  marketed. The  Company  intends to  design and
develop most of these products so as to be eligible for FDA 510(k) clearance and
waivers under  CLIA, although  there  can be  no  assurance that  the  Company's
products  under development  will obtain such  clearances or  waivers. See "Risk
Factors."
 
    Products currently being developed by the Company are described below.
 
    METABOLIC BONE DISEASES AND DISORDERS.  Osteoporosis is the most  widespread
form  of bone disease characterized by a general loss of bone density. This loss
of bone density can  lead to a  weakening of the bone,  thereby making the  bone
more  prone to fractures. Biological markers  of bone metabolism are secreted in
urine, and it  has been  shown that  the level  of secretion  correlates to  the
amount of bone loss. The measured levels of these markers has also been shown to
be  responsive to osteoporosis therapies  such as hormone replacement. According
to the National Osteoporosis Foundation,  this disease afflicts over 25  million
Americans  and  over  200  million  people  worldwide.  In  the  United  States,
approximately 1.5 million  osteoporosis related fractures  occur each year.  For
Caucasian women, it is estimated that the risk of hip fractures approximates the
combined  risks of  breast, endometrial  and ovarian  cancers. The  World Health
Organization estimates that the  cost of osteoporosis  related fractures in  the
United States exceeds $7 billion annually.
 
    The  Company has entered into an  agreement with Metra Biosystems to develop
and  market  Metra  Biosystems'  Pyrilinks-D  and  other  related  bone   marker
technologies  on the L-D-X System. The Company has successfully demonstrated the
feasibility of meeting the initial  specifications for the Company's  technology
for  this  urine-based  immunoassay test  on  the  L-D-X System  and  is  in the
prototype stage of development. See "-- Strategic Relationships."
 
    RENAL FUNCTION TESTS.  The Company  is developing a menu expansion of  tests
to  include tests for uric acid, blood urea nitrogen and creatinine for the POL.
The Company believes that these tests are among the most commonly ordered  tests
in  physician offices. Uric acid  elevations occur in renal  diseases as well as
gout, and low uric acid levels are sometimes associated with diabetes and severe
liver disease. Blood urea nitrogen elevations occur in chronic renal disease  as
well  as urinary  tract obstruction.  Blood urea  nitrogen is  useful to monitor
hemodialysis and other therapies. Creatinine is also a measure of renal function
and is used  in combination with  uric acid  and blood urea  nitrogen tests.  In
addition,  creatinine is used  as a measure  of renal blood  flow which may have
become reduced due  to congestive heart  failure or dehydration.  Low levels  of
creatinine  may  result  from  decreased hepatic  production  in  advanced liver
disease. The Company  is currently  conducting feasibility studies  for each  of
these tests.
 
    PROSTATE SPECIFIC ANTIGEN (PSA).  The American Cancer Society estimates that
in  1996, 317,000 Americans will be  diagnosed with prostate cancer and predicts
that deaths from  prostate cancer in  the United States  will reach over  41,000
making it the second leading cause of cancer related deaths. The American Cancer
Society  recommends that men 50 and older  receive a PSA blood test annually. By
making early detection  possible, treatment  can begin  when there  is a  higher
likelihood of success,
 
                                       33
<PAGE>
leading  to better survival rates from the disease. The Company has demonstrated
the feasibility of measuring  PSA from a  single drop of  whole blood using  the
Company's  technology. The  Company expects  that the  PSA test  may require PMA
approval from the FDA. See "-- Government Regulation."
 
    GLYCATED HEMOGLOBIN.  Glycated hemoglobin measurement is used by  physicians
to  assess a  diabetic's long term  compliance with prescribed  diet and insulin
usage. This test  measures the  percent of  the patient's  hemoglobin which  has
become coupled to glucose. A relatively high percentage of hemoglobin to glucose
indicates poor patient compliance, which can lead to severe health problems. The
American   Diabetes   Association  ("ADA")   recommends  at   least  semi-annual
measurement for all diabetic patients. It  is estimated that there are seven  to
eight million diagnosed diabetics in the United States.
 
    The  Company has been  notified by the  U.S. Department of  Health and Human
Services that it will  receive a "Small Business  Innovative Research" grant  of
$100,000  to  further develop  this test  on  the L-D-X  System. The  Company is
currently evaluating the feasibility of a test to detect glycated hemoglobin  on
the L-D-X System.
 
    OTHER PRODUCTS UNDER DEVELOPMENT.  The Company currently sells two cassettes
which can calculate LDL cholesterol levels from the combined readings of TC, HDL
and  triglycerides. LDL cholesterol is  the fraction of TC  which leads to heart
disease and is referred to as "bad" cholesterol. There is now available a direct
version of the LDL test,  and the Company is  considering adapting this form  of
the  test  to the  L-D-X  System. The  advantage of  this  direct test  over the
calculated version of the test is that  it does not require the patient to  fast
before testing. However, since lipid management requires the physician to assess
a  patient treatment on  both "good" and "bad"  cholesterol, the disadvantage of
the stand alone direct  LDL test is  the lack of the  patient's HDL values.  The
Company  believes  that the  L-D-X  System may  overcome  this problem  with its
ability to run multiple tests simultaneously on the system.
 
    The Company is currently evaluating the feasibility of a test to detect  the
levels  of liver enzymes in  whole blood. Liver enzymes  are measures of hepatic
damage which may be caused by  a number of diseases and/or chemical  toxicities.
The  ability to monitor the levels of liver enzymes is important because a large
number of drugs, including cholesterol  lowering drugs, can cause liver  damage.
The  Company  believes  that a  liver  enzyme  test would  complement  its lipid
diagnostic products.
 
    Lp(a) is a lipoprotein which is a component of LDL. It has been  established
in  the scientific literature  that Lp(a) is a  risk factor for atherosclerosis,
and it is believed that Lp(a) may  be the component of LDL which is  responsible
for the risk associated with LDL. The Company believes that a test for Lp(a) may
emerge  as the  dominate test for  cardiac risk  in the future.  The Company has
licensed the rights  to a new  technology to measure  Lp(a). This technology  is
currently being evaluated by the Company and a number of collaborators.
 
    There  can  be  no assurance  that  the  Company will  be  able  to complete
successful development of any of  these future products. Furthermore, there  can
be no assurance that even if these products and/or any other future products are
successfully  developed, the  Company will be  able to  successfully receive FDA
clearance or  approval or  CLIA  waivers on  a  timely basis,  manufacture  such
products  on a cost effective basis and in compliance with applicable regulatory
standards,  or  successfully  market  these  products.  See  "Risk  Factors   --
Dependence on Development and Introduction of New Products."
 
SALES AND MARKETING
 
    To  date,  the  Company  has  focused its  sales  and  marketing  efforts on
hospitals,  managed  care  organizations,   large  physician  group   practices,
corporate  wellness programs, community health centers, health promotion service
providers and  other independent  screeners in  the screening  market. With  the
recent  CLIA waiver of its  existing product line, the  Company believes that it
has a significant opportunity
 
                                       34
<PAGE>
to access the monitoring market. The Company utilizes a combination of a  direct
sales  force and regional distributors to sell  into the screening market and is
developing a national distribution network to access the monitoring market.
 
    The Company  provides continuing  customer support,  including an  automated
order  entry system, and  technical support whenever  needed to promote customer
satisfaction. A U.S.  toll-free number  gives the customer  immediate access  to
Cholestech's  in-house customer  service and  technical support  group. Customer
service  representatives   also  assist   customers  to   order  cassettes   and
accessories.  The Company  maintains an  in-house instrument  service capability
that provides repairs  to instruments either  under warranty or  on a parts  and
labor basis.
 
  SCREENING MARKET
 
    The Company's distribution strategy for the screening market is to sell both
directly  to high  volume customers and  to selected  regional distributors. The
Company believes  that  its products  provide  a  cost effective,  easy  to  use
alternative  for preventive health care programs that are focused on identifying
high risk  individuals with  possible cardiovascular  disease and  diabetes  and
enrolling  them into appropriate  disease intervention programs  to reduce their
overall health risk.
 
    The Company sells directly through a  field sales group which includes  nine
regional   sales  managers.   In  addition,   the  Company   has  established  a
telemarketing effort to support large volume customers and utilizes direct  mail
campaigns to increase demand for its products. The Company also has entered into
agreements  with nine  regional distributors  that augment  the Company's direct
sales efforts.
 
    The Company's international distribution  strategy for the screening  market
is  designed  to opportunistically  penetrate  targeted geographical  markets by
selling directly  to individual  distributors in  those areas.  The Company  has
entered  into  agreements with  several foreign  distributors to  distribute the
L-D-X System primarily in  Europe and Latin America  and is negotiating  similar
agreements with other distributors in South and Central America.
 
  MONITORING MARKET
 
    The  Company's sales  and marketing  efforts in  the monitoring  market will
initially be focused on the POL and pharmacy segments. To efficiently access the
54,000 POLs,  the Company  is  negotiating with  several national  and  regional
distributors.  As of April  1, 1996, the  Company entered into  a national, non-
exclusive  distribution  agreement  with   PSS,  a  national  medical   products
distributor with more than 700 sales professionals who focus on the POL market.
 
    The pharmacy market consists of 68,000 pharmacies which may provide point of
care testing. The Company believes that marketing success in the pharmacy market
will   be  dependent  upon  the   development  of  patient  monitoring  programs
implemented in conjunction with managed care providers and physicians on a local
basis. In  January  1996,  the  American  Pharmaceutical  Association  announced
Project  IMPACT (IMprove Persistence And  Compliance to Therapy). Project IMPACT
is being  funded  by Merck,  and  its goal  is  to demonstrate  the  ability  of
pharmacists   to  enhance  patient  outcomes  with  drug  therapy  and  behavior
modification. The pilot program enlarges the  pharmacist's role to one in  which
the  pharmacist monitors  therapeutic effectiveness of  medications and provides
counseling services  to  the  patient. Utilizing  pharmacists  to  provide  such
services  may result in both direct and indirect cost savings to the patient and
the patient's insurer. The  Company is participating  in Project IMPACT  through
the  use  of  its  L-D-X  System  to  monitor  patients  in  this pharmacy-based
cholesterol management project. The  Company intends to  utilize the program  to
evaluate  the potential market  for the L-D-X  System among pharmacists. Project
IMPACT will monitor approximately 900 patients at 32 community-based  pharmacies
across the country for a period of two years.
 
    There  can be no  assurance that the  Company will be  able to penetrate the
monitoring market, including the  POL or pharmacy  segments, or that  physicians
will  use the L-D-X System instead of  clinical laboratory services for the same
tests. See  "Risk Factors  --  Uncertainty of  Market  Acceptance of  the  L-D-X
System."
 
                                       35
<PAGE>
STRATEGIC RELATIONSHIPS
 
    The  Company's  strategy  includes establishing  strategic  relationships to
develop new products,  expand its customer  base, and provide  the Company  with
technological, clinical, marketing, financial and other key resources.
 
    In May 1996, the Company entered into a development, marketing and licensing
agreement  with  Metra  Biosystems  to  develop  an  immunoassay  test  cassette
incorporating Metra Biosystems' bone resorption  technology to be used with  the
L-D-X  System.  Pursuant to  the  agreement, Metra  Biosystems  purchased 39,526
shares of the Company's Common Stock for an aggregate purchase price of $250,000
($6.325 per share) and is obligated to purchase $750,000 of additional shares of
Common Stock upon  the completion of  specified milestones by  the Company.  The
Company  has  granted Metra  Biosystems registration  rights in  connection with
Metra Biosystems' purchase of  the Company's Common  Stock. See "Description  of
Capital Stock -- Registration Rights."
 
    In  connection with the development of  the immunoassay test cassette, Metra
Biosystems granted Cholestech a  non-exclusive, royalty-bearing license to  use,
make, sell, offer to sell, import or distribute the resulting cassette to assess
bone resorption, a gauge of the effectiveness of treatments of certain metabolic
diseases  and  disorders  and  certain  future  products  worldwide  (the "Metra
License"). The Company is obligated to pay royalties to Metra Biosystems on  the
bone  resorption product and on products that  stem from work done in the course
of the collaboration but do not incorporate any of Metra Biosystems' proprietary
technology. The  parties will  negotiate royalties  on future  Metra  Biosystems
products  as  appropriate.  Under the  agreement,  the Company  will  market the
immunoassay test  through  its  existing distribution  channels  in  the  United
States.  The  Company and  Metra  Biosystems will  work  together to  market and
distribute the tests internationally.
 
    There can be no assurance that the Company will be successful in  developing
a  bone resorption  test or  any other product  under this  agreement, that this
agreement will not expire prior  to its term, or that  even if any products  are
developed  that they will be successfully marketed. The Company expects to enter
into additional strategic agreements in the future to develop, commercialize and
sell its current and future products. There can be no assurance that the Company
will be able  to negotiate  acceptable agreements in  the future,  or that  such
relationships  will be successful.  In addition, there can  be no assurance that
the  Company's  strategic  partners   will  not  pursue  alternative   competing
technologies or products.
 
MANUFACTURING
 
    The  Company manufactures,  tests, performs quality  assurance, packages and
ships  products  at  its  30,000  square  foot  facility  located  in   Hayward,
California. The Company maintains control of those portions of the manufacturing
process  that it believes are complex and provide important barriers to entry by
competitors. The production  processes employed  by the  Company to  manufacture
cassettes  differ significantly  from those employed  in the  manufacture of the
analyzer.
 
  MANUFACTURE OF CASSETTES
 
    The Company  purchases chemicals,  membranes and  other raw  materials  from
third  party  suppliers  and  converts these  raw  materials,  using proprietary
processes, into cassettes.  The Company believes  its proprietary processes  and
custom-designed equipment are important components of its cassette manufacturing
operations. The Company has developed core manufacturing technologies, processes
and  production machinery, including  (i) membrane lamination  and welding; (ii)
discrete membrane  impregnation; (iii)  on-line calibration;  and (iv)  software
control of the manufacturing process. The Company is currently in the process of
completing  validation of the second cassette manufacturing line and expects the
line to  be fully  operational in  mid-1996. In  the event  that cassette  sales
volume  significantly increases,  the Company would  be required  to construct a
third cassette manufacturing line. There can be no assurance that such expansion
of cassette manufacturing  capacity can  be completed  in a  timely fashion,  if
ever,  and the  failure to  increase cassette  manufacturing capacity  on a cost
effective and timely basis would have a material adverse effect on the Company's
business, financial condition and results of operations.
 
                                       36
<PAGE>
    Manufacturing  of the  cassettes is highly  complex and sensitive  to a wide
variety of factors, including  variations and impurities  in the raw  materials,
performance  of the manufacturing equipment and the level of contaminants in the
manufacturing environment.  Incoming  inspection of  raw  materials,  in-process
controls,  improved  manufacturing  equipment performance,  and  better operator
proficiency and training  all contribute  to improvements  in yield.  Continuous
improvement  of process factors are key determinants of manufacturing output and
efficiency, product quality and reliability and overall profitability.  Although
the  Company believes that it has acceptable  cassette yields and should be able
to maintain the current cassette yield in the future, there can be no  assurance
that  such improvement will  be maintained or  that the Company  will not suffer
future periodic  cassette yield  problems  in connection  with new  or  existing
products.  Failure to maintain  the improvements in process  yield or failure to
obtain acceptable yields on future products could have a material adverse effect
on the Company's business. See "Risk  Factors -- Risks Associated with  Cassette
Manufacturing."
 
  MANUFACTURE OF L-D-X ANALYZER
 
    The  analyzer employs a variety of  subassemblies and components designed or
specified by the Company, including an optical element, microprocessors, circuit
boards,  a  liquid  crystal  display  and  other  electrical  components.  These
components  and subassemblies are manufactured by a variety of third parties and
are shipped to the Company for final assembly. The Company's manufacture of  the
analyzer  consists  primarily of  assembly,  testing, inspection  and packaging.
Testing consists of  a burn-in  period, functional tests  and integrated  system
testing  using specially  produced test cassettes.  The Company  believes it can
expand its current analyzer manufacturing capacity at minimal cost.
 
  RAW MATERIALS; QUALITY ASSURANCE
 
    Outside vendors provide  Cholestech with subassemblies,  components and  raw
materials.  These materials are purchased, inspected and tested by the Company's
quality control personnel. The Company's quality control personnel also  perform
finished  goods quality  control and  inspection and  maintain documentation for
compliance  with   cGMP   and  other   government   manufacturing   regulations.
Cholestech's  manufacturing  facilities are  subject  to periodic  inspection by
regulatory authorities. See "--  Government Regulation." Certain key  components
and  raw  materials used  in  the manufacturing  of  the Company's  products are
currently provided by single-source vendors  pursuant to the Company's  periodic
purchase  orders. The  Company believes that  it maintains an  adequate level of
such components and  raw materials  in inventory and  believes that  alternative
sources for such components and raw materials are available. However, any supply
interruption  in a sole-sourced component or  raw material would have a material
adverse effect on  the Company's  business once  the inventory  is depleted  and
until  a  new  source of  supply  were  qualified. In  addition,  an uncorrected
impurity or  supplier's variation  in  a raw  material,  either unknown  to  the
Company  or incompatible with the Company's  manufacturing process, could have a
material adverse effect  on the  Company's business.  Because the  Company is  a
small  customer of  many of its  suppliers, there  can be no  assurance that its
suppliers will devote adequate resources  to supplying the Company's needs.  See
"Risk Factors -- Dependence on Suppliers."
 
COMPETITION
 
    The  testing market in which the  Company competes is intensely competitive.
The Company's competition consists  mainly of independent clinical  laboratories
and  hospital-based laboratories, as well as with manufacturers of bench top and
other point of care analyzers. The substantial majority of diagnostic tests used
by physicians  and  other  health  care providers  are  currently  performed  by
clinical  laboratories and hospital-based laboratories. The Company expects that
these laboratories will  compete intensely  to maintain their  dominance in  the
monitoring  market. In  order to achieve  broad market acceptance  for the L-D-X
System, the Company will be required to demonstrate that the L-D-X System is  an
attractive alternative to the independent clinical laboratory and hospital-based
laboratory. This will
 
                                       37
<PAGE>
require  physicians  to  change their  established  means of  having  such tests
performed. There can  be no  assurance that  the L-D-X  System will  be able  to
compete  with the  testing services  provided by  these laboratories.  See "Risk
Factors -- Uncertainty of Market Acceptance of L-D-X System."
 
    In addition,  companies  having a  significant  presence in  the  diagnostic
market,  such as Abbott Laboratories, Clinical Diagnostic Systems, a division of
Johnson and Johnson which was formerly a division of Eastman Kodak Company,  and
Boehringer  Mannheim, have  developed or  are developing  analyzers targeted for
point  of  care.  These   competitors  have  substantially  greater   financial,
technical,  research and other resources and larger, more established marketing,
sales, distribution and  service organizations  than the  Company. In  addition,
such competitors offer broader product lines than the Company, have greater name
recognition  than the Company, and offer  discounts as a competitive tactic. The
Company believes  that  it  currently  has  a  competitive  advantage  with  the
classification  of  its  existing products  as  waived under  CLIA.  The Company
expects that the reclassification of the L-D-X System as waived under CLIA  will
result  in  competitors  seeking to  develop  products that  qualify  for waived
classification. There can be  no assurance that  the Company's competitors  will
not  succeed in obtaining CLIA waived status for their products or in developing
or marketing technologies or products  that are more effective and  commercially
attractive  than the Company's current or  future products, or that would render
the Company's technology or products obsolete or noncompetitive.
 
    The Company's products  must compete effectively  overall with the  existing
and  future products of its competitors primarily on the basis of the ability to
perform tests at point of care, ease of use, testing of multiple analytes from a
single sample, ability to conduct tests without a skilled technician or a  blood
pretreatment  step,  the  breadth  of  tests  available,  market  presence, cost
effectiveness, precision,  accuracy or  immediacy of  results. There  can be  no
assurance  that  the  Company  will  have  the  financial  resources,  technical
expertise  or  marketing,  distribution  or  support  capabilities  to   compete
successfully  in  the  future.  See  "Business  --  Products  --  Products Under
Development -- Technology and -- Competition."
 
PATENTS AND PROPRIETARY TECHNOLOGY
 
    The Company pursues  an active  patenting policy to  protect inventions  and
technology  which are important  to its business. The  Company owns eight United
States patents covering various  aspects of the  technology incorporated in  its
products,  including the method for separating  HDL from other lipoproteins in a
dry chemistry format,  the basic design  of the testing  cassette and the  L-D-X
Analyzer  and the method  of correcting for  the effects of  substances that can
interfere with testing  of a  blood sample. The  Company has  also filed  patent
applications  relating  to its  core  inventions and  technology internationally
under the Patent  Cooperation Treaty  and individual  foreign applications.  The
Company  is  also the  licensee  of one  United  States patent  relating  to the
measurement of  Lp(a)  and a  number  of third  party  patents relating  to  its
cassette technology.
 
    The medical products industry has been characterized by extensive litigation
regarding  patents  and other  intellectual property  rights, and  any potential
litigation can  result in  substantial  loss or  diversion  of revenues  of  the
Company and could have a material adverse effect on the Company. There can be no
assurance that pending patent applications filed by the Company will be approved
or  that the issued or pending patents will not be challenged or circumvented by
competitors. Notwithstanding the Company's active pursuit of patent  protection,
the  Company believes  that its  future success  will depend  primarily upon the
technical expertise, creative skills and  management abilities of its  officers,
directors and key employees rather than on patent ownership.
 
    There  can be no assurance that infringement  claims will not be asserted by
other parties in the future, that in such event the Company will prevail or that
it will be able to obtain  licenses on reasonable terms. Adverse  determinations
in  any litigation could subject the  Company to significant liabilities and/ or
require the  Company to  seek licenses  from third  parties. If  the Company  is
unable to obtain necessary
 
                                       38
<PAGE>
licenses  or  is  unable to  develop  or implement  alternative  technology, the
Company may be  unable to  manufacture and sell  the affected  products. Any  of
these outcomes could have a material adverse effect on the Company's business.
 
    The  Company relies substantially  on trade secrets,  technical know-how and
continuing invention  to  develop and  maintain  its competitive  position.  The
Company works actively to foster continuing technological innovation to maintain
and  protect  its  competitive  position, and  the  Company  has  taken security
measures to protect its trade secrets and periodically explores ways to  further
enhance trade secret security. There can be no assurance that such measures will
provide adequate protection for the Company's trade secrets or other proprietary
information.  Although  the  Company has  entered  into  proprietary information
agreements with  its  employees,  consultants  and advisors,  there  can  be  no
assurance  that these  agreements will  have adequate  remedies for  any breach.
There can be no assurance that the Company's competitors will not  independently
develop  substantially  equivalent  proprietary  information  and  techniques or
otherwise  gain  access  to  the  Company's  trade  secrets  or  disclose   such
technology,  or that the Company can meaningfully protect its right to its trade
secrets.
 
GOVERNMENT REGULATION
 
  FDA AND OTHER REGULATIONS
 
    The manufacture and sale of the Company's products are subject to regulation
by numerous  governmental authorities,  principally  the FDA  and  corresponding
state  and  foreign  regulatory  agencies.  Pursuant to  the  FDC  Act,  the FDA
regulates  the  clinical  testing,   manufacture,  labeling,  distribution   and
promotion  of medical  devices. Noncompliance  with applicable  requirements can
result in, among other  things, fines, injunctions,  civil penalties, recall  or
seizure  of products, total or partial  suspension of production, failure of the
government to  grant  premarket clearance  or  premarket approval  for  devices,
withdrawal  of marketing approvals, a recommendation by the FDA that the Company
not be permitted to  enter into government  contracts and criminal  prosecution.
The  FDA also has the authority to  request repair, replacement or refund of the
cost of any device manufactured or distributed by the Company.
 
    In the  United States,  medical devices  are classified  into one  of  three
classes,  Class I, II or III, on the basis  of the controls deemed by the FDA to
be necessary  to  reasonably ensure  their  safety and  effectiveness.  Class  I
devices  are subject to general  controls (e.g. labeling, premarket notification
and adherence to cGMPs). Class II devices are subject to general controls and to
special controls (e.g. performance  standards, postmarket surveillance,  patient
registries,  and FDA  guidelines). Generally, Class  III devices  are those that
must  receive  premarket  approval  by  the  FDA  to  assure  their  safety  and
effectiveness (e.g. life-sustaining, life-supporting and implantable devices, or
new  devices  which  have not  been  found substantially  equivalent  to legally
marketed  devices),  and   require  clinical  testing   to  assure  safety   and
effectiveness and FDA approval prior to marketing and distribution.
 
    Before a new device can be introduced into the market, the manufacturer must
generally  obtain marketing  clearance through  a pre-market  notification under
Section 510(k) of the FDC Act or an approval of a PMA application under  Section
515  of  the  FDC Act.  A  510(k) clearance  typically  will be  granted  if the
submitted information  establishes that  the proposed  device is  "substantially
equivalent" to a legally marketed Class I or II medical device or to a Class III
medical  device for which the FDA has not called for PMAs. A 510(k) notification
must contain information to  support a claim  of substantial equivalence,  which
may  include laboratory test results  or the results of  clinical studies of the
device in humans. It generally takes from four to twelve months from the date of
submission to  obtain  a  510(k) clearance,  but  it  may take  longer.  A  "not
substantially  equivalent" determination by the FDA, or a request for additional
information, could 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  could  significantly  affect  safety   or
effectiveness,  or constitute a major change in  the intended use of the device,
will require new 510(k)  submissions. The L-D-X Analyzer  and all existing  test
cassettes  required that the Company obtain  510(k) clearance prior to marketing
in the United States.
 
                                       39
<PAGE>
    In general,  the Company  intends  to develop  and  market tests  that  will
require  no more than 510(k) clearance. However, if the Company cannot establish
that a proposed test cassette is substantially equivalent to a legally  marketed
device,  the Company must seek pre-market approval of the proposed test cassette
from the FDA through the submission of a PMA application. Certain products under
development,  including  the  PSA  test,   may  require  submission  of  a   PMA
application.  A PMA  application generally must  be supported  by extensive data
including, laboratory, preclinical and clinical  data to demonstrate safety  and
efficacy,  as well as 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  training  methods  (if  required).  Upon
receipt  of a  PMA 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  PMA application  is sufficiently  complete  to
permit a substantive review, the FDA will accept the application for filing. The
PMA approval process can be lengthy, expensive and uncertain. An FDA review of a
PMA  application  generally takes  one  to three  years  from the  date  the PMA
application is accepted for filing, but may take significantly longer.
 
    Any products  manufactured or  distributed by  the Company  pursuant to  FDA
clearance or approvals are subject to pervasive and continuing regulation by FDA
and  certain state agencies, including record keeping requirements and reporting
of adverse  experience with  the use  of the  device. Labeling  and  promotional
activities  are subject to scrutiny by FDA and, in certain circumstances, by the
Federal Trade Commission. Current FDA enforcement policy prohibits the marketing
of approved medical devices for unapproved uses.
 
    The FDC  Act  regulates  the Company's  quality  control  and  manufacturing
procedures   by  requiring  the  Company   and  its  contract  manufacturers  to
demonstrate compliance  with  cGMP.  The  FDA  monitors  compliance  with  these
requirements by requiring manufacturers to register with the FDA, which subjects
them  to  periodic  inspections. While  the  Company's  manufacturing processes,
facilities and  practices  have not  been  inspected  by the  FDA,  the  Company
believes that its manufacturing practices are in compliance with cGMP. The State
of California also regulates and inspects Cholestech's manufacturing facilities.
The  Company has been inspected twice by the  State of California to date and is
manufacturing under an issued medical device manufacturers facility license from
the State of California. If violations  of the applicable regulations are  noted
during  an FDA or State of  California inspection of the Company's manufacturing
facilities or the  manufacturing facilities of  its contract manufacturers,  the
continued marketing of the Company's product could be adversely affected.
 
    The  Company and  its products are  also subject  to a variety  of state and
local laws and regulations in those states or localities where its products  are
or  will be  marketed. Any  applicable state  or local  laws or  regulations may
hinder the  Company's  ability  to  market  its  products  in  those  states  or
localities.
 
    The  Company  is also  subject  to numerous  federal,  state and  local laws
relating to such  matters as safe  working conditions, manufacturing  practices,
environmental  protection,  fire hazard  control  and disposal  of  hazardous or
potentially hazardous substances.  There can  be no assurance  that the  Company
will  not be required  to incur significant  costs to comply  with such laws and
regulations now or in the future or that such laws or regulations will not  have
a material adverse effect upon the Company.
 
    Changes in existing requirements or adoption of new requirements or policies
could  increase the  cost of  or otherwise adversely  affect the  ability of the
Company  to  comply  with  regulatory  requirements.  Failure  to  comply   with
regulatory requirements could have a material adverse effect on the Company.
 
  CLIA REGULATIONS
 
    The  use of the Company's products in  the United States is subject to CLIA,
which provides for federal  regulation of laboratory  testing, an activity  also
regulated  by  most  states.  Laboratories  either  must  obtain  a registration
certificate from HCFA, register with an approved accreditation agency or  obtain
a  state license in a state with  a federally approved license program. The CLIA
regulations seek to  ensure the quality  of medical testing  and generally  took
effect in September 1992 with a two-year phase-in of
 
                                       40
<PAGE>
certain  requirements. The three primary mechanisms  to accomplish this goal are
daily quality control requirements to ensure the accuracy of laboratory  devices
and  procedures, proficiency testing to  measure testing accuracy, and personnel
standards to assure appropriate training and experience for laboratory  workers.
CLIA  categorizes tests as "waived," or as being "moderately complex" or "highly
complex" on the basis of specific criteria.
 
    Prior to January 1996,  the L-D-X System,  including all current  cassettes,
was  categorized under  CLIA as moderately  complex. In January  1996, the L-D-X
System and the TC, HDL, Triglycerides and Glucose tests in any combination  were
reclassified  as waived under  CLIA. Under the  waived classification, users are
only required to obtain a  certificate of waiver from HCFA  and pay a $100  fee.
This  certificate must be  renewed every two years.  Current L-D-X System users,
including managed  care organizations,  hospitals, self-insured  businesses  and
health  promotion organizations, will now  be able to use  the L-D-X System at a
lower cost. The Company provides United  States purchasers of its products  with
the  documentation, systems  and support necessary  for the  purchaser to comply
with CLIA. In order to successfully  commercialize the tests that are  currently
under  development,  the Company  believes that  it will  be critical  to obtain
waived classification for such tests under CLIA. There can be no assurance  that
any   new  tests  developed   by  the  Company  will   qualify  for  the  waived
classification. Any failure of the new tests to obtain waived status under  CLIA
will  adversely impact the Company's ability  to commercialize such tests, which
could have  a  material adverse  effect  on the  Company's  business,  financial
condition and results of operations. In addition, there can be no assurance that
any  future  amendment of  CLIA or  the  promulgation of  additional regulations
impacting laboratory testing will  not have an adverse  effect on the  Company's
ability  to market  the L-D-X  System. If  CLIA regulations  were modified  in a
manner that reduced  regulatory requirements  and burdens  faced by  competitive
products, any competitive advantage of the L-D-X System's waived status would be
reduced or eliminated.
 
THIRD PARTY REIMBURSEMENT
 
    In  the  United  States,  health  care  providers,  such  as  hospitals  and
physicians, that  purchase diagnostic  products, including  the Company's  L-D-X
System,  generally  rely  on  third  party  payors,  principally  private health
insurance plans, federal Medicare and state  Medicaid, to reimburse all or  part
of  the cost of the procedure in which  the product is being used. The Company's
ability to commercialize  its products  successfully in the  United States  will
depend  in  part on  the  extent to  which reimbursement  for  the cost  of such
products  and  related  treatment  will  be  available  from  government  health
administration   authorities   (such   as   HCFA,   which   determines  Medicare
reimbursement levels),  private health  insurers and  other organizations.  Such
third  party payors can affect the pricing or the relative attractiveness of the
Company's products by regulating the maximum amount of reimbursement provided by
such payors for testing services.  Reimbursement is currently not available  for
certain  uses of  the Company's  products. For  example, the  cost of  the L-D-X
Analyzer is generally not subject to reimbursement by government or other  third
party  payors. In  addition, the tests  performed by  public health departments,
corporate wellness programs and other large volume users in the screening market
are generally not  subject to  reimbursement. In addition,  certain health  care
providers  are  moving towards  a managed  care system  in which  such providers
contract to provide  comprehensive health  care for  a fixed  cost per  patient.
Managed  care providers  are attempting  to control the  cost of  health care by
authorizing fewer  elective  procedures,  such as  screening  of  blood  disease
levels.  The  Company is  unable to  predict what  changes will  be made  in the
reimbursement methods  utilized by  third  party payors.  The Company  could  be
adversely  affected  by changes  in  reimbursement policies  of  governmental or
private health care payors, particularly to  the extent any such changes  affect
reimbursement  for procedures  in which the  Company's products  are used. Third
party payors are  increasingly scrutinizing and  challenging the prices  charged
for  medical products and services. Decreases in reimbursement amounts for tests
performed using the Company's products may decrease amounts physicians and other
practitioners are able to  charge patients, which in  turn may adversely  affect
the  Company's ability to  sell its products  on a profitable  basis. Failure by
physicians and other users to obtain  reimbursement from third party payors,  or
changes   in  government  and  private   third  party  payors'  policies  toward
reimbursement of tests
 
                                       41
<PAGE>
employing the Company's  products could have  a material adverse  effect on  the
Company's business. Given the efforts to control and reduce health care costs in
the  United States  in recent  years, there can  be no  assurance that currently
available levels  of  reimbursement  will  continue to  be  available,  or  that
adequate  reimbursement  will  be  available in  the  future  for  the Company's
existing  products  or  products  under   development.  See  "Risk  Factors   --
Uncertainty Relating to Third Party Reimbursement."
 
    Effective  October 1, 1991,  HCFA adopted new  regulations providing for the
inclusion of  capital-related costs  in the  prospective payment  system,  under
which providers are reimbursed on a
per-diagnosis  basis at  fixed rates unrelated  to actual costs,  based on DRGs.
Under this  system  of reimbursement,  equipment  costs generally  will  not  be
reimbursed separately, but rather, will be included in a single, fixed-rate, per
patient  reimbursement. These  regulations are being  phased in  over a ten-year
period, and, although the full implications  of these regulations cannot yet  be
known, the Company believes that the new regulations will place more pressure on
hospitals'  operating margins, causing them to limit capital expenditures. These
regulations could have an adverse effect  on the Company if hospitals decide  to
defer  obtaining medical equipment as  a result of any  such limitation on their
capital expenditures. The Company  is unable to predict  what adverse impact  on
the   Company,  if  any,  additional   government  regulations,  legislation  or
initiatives or changes by other payors affecting reimbursement or other  matters
that may influence decisions to obtain medical equipment may have.
 
    In  addition, market acceptance  of the Company's  products in international
markets is dependent,  in part,  upon the availability  of reimbursement  within
prevailing  health care payment  systems. Reimbursement and  health care payment
systems in international markets vary significantly by country, and include both
government sponsored health care and private insurance.
 
    The Company believes that  the overall escalating  cost of medical  products
and  services has led to and will continue to lead to increased pressures on the
health care industry, both foreign and domestic, to reduce the cost of  products
and  services,  including  products offered  by  the  Company. There  can  be no
assurance as  to  either United  States  or  foreign markets  that  third  party
reimbursement   and  coverage  will  be  available  or  adequate,  that  current
reimbursement amounts  will  not be  decreased  in  the future  or  that  future
legislation,  regulation, or reimbursement  policies of third  party payors will
not otherwise adversely  affect the  demand for  the Company's  products or  its
ability to sell its products on a profitable basis.
 
PRODUCT LIABILITY AND INSURANCE
 
    Sale of the Company's products entails risk of product liability claims. The
medical  testing industry has historically been litigious, and the Company faces
financial exposure to  product liability  claims in the  event that  use of  its
products  result in personal injury. The Company also faces the possibility that
defects in the design or manufacture of its products might necessitate a product
recall. There can be  no assurance that the  Company will not experience  losses
due  to product liability claims or recalls in the future. The Company currently
maintains product liability insurance with  coverage limits of $5.0 million  per
occurrence  and $5.0  million annually  in the  aggregate, and  there can  be no
assurance that the coverage limits of  the Company's insurance policies will  be
adequate.  Such  insurance is  expensive,  difficult to  obtain  and may  not be
available in the  future on acceptable  terms, or  at all. No  assurance can  be
given  that product  liability insurance  can be maintained  in the  future at a
reasonable cost or in sufficient amounts  to protect the Company against  losses
due to liability. An inability to maintain insurance at an acceptable cost or to
otherwise  protect against potential product  liability could prevent or inhibit
the continued  commercialization  of  the Company's  products.  In  addition,  a
product  liability claim  in excess  of relevant  insurance coverage  or product
recall could have a material adverse effect on the Company's business, financial
condition and results of operations.
 
    The Company has  liability insurance  covering its  property and  operations
with  coverage and deductible amounts and  exclusions which the Company believes
are customary for companies of its size
 
                                       42
<PAGE>
in its  industry. The  Company's personal  property is  insured for  up to  $4.0
million  and  it has  comprehensive  general liability  coverage  of up  to $5.0
million. In addition, the Company has  business interruption insurance of up  to
$5.6  million. There  can be no  assurance that the  Company's current insurance
coverage is  adequate or  that  it will  be able  to  maintain insurance  at  an
acceptable cost or otherwise to protect against liability.
 
EMPLOYEES
 
    As  of March  31, 1996, the  Company employed 79  full-time employees. There
were 33 employees  in sales, marketing  and administration and  42 employees  in
manufacturing  and 4 employees devoted to  research and development. The Company
seeks to  attract and  retain skilled  and experienced  employees with  directly
relevant  experience  in  the  fields  of interest,  although  there  can  be no
assurance that  it will  continue  to do  so  in the  future.  The loss  of  key
personnel  or the inability to hire or retain qualified personnel, in particular
a new executive officer  of sales could  have a material  adverse effect on  the
Company's  business, financial condition and results  of operations. None of the
employees is  covered  by  a collective  bargaining  agreement,  and  management
considers relations with employees to be excellent.
 
FACILITIES
 
    The Company leases a 30,000 square foot facility in Hayward, California. The
Company's facility contains approximately 5,000 square feet of laboratory space,
7,000  square feet of  manufacturing space and  approximately 18,000 square feet
devoted to marketing and administrative and common areas. The Company's lease on
the facility expires in the year  2000. The Company believes that this  facility
is adequate to meet its requirements through the expiration of its lease.
 
LEGAL PROCEEDINGS
 
    The Company is not a party to any legal proceedings.
 
                                       43
<PAGE>
                                   MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
    The  following table sets forth certain information concerning the directors
and executive officers of the Company as of May 7, 1996.
 
<TABLE>
<CAPTION>
                    NAME                           AGE                                POSITION
- ---------------------------------------------      ---      ------------------------------------------------------------
<S>                                            <C>          <C>
Warren E. Pinckert II........................          52   President, Chief Executive Officer and Director
Steven L. Barbato............................          46   Vice President of Manufacturing
Gary E. Hewett...............................          44   Vice President of Diagnostic Development
Richard H. Janney............................          37   Vice President of Finance and Chief Financial Officer
Harvey S. Sadow, Ph.D. (1)(2)................          73   Chairman of the Board of Directors
Joseph Buchman, M.D. (1).....................          66   Director
John L. Castello (2).........................          60   Director
H.R. Shepard (1).............................          75   Director
</TABLE>
 
- --------------
(1) Member of the Audit Committee.
(2) Member of the Compensation Committee.
 
    WARREN E. PINCKERT II joined the Company as Chief Financial Officer and Vice
President of Business Development in 1989 and became Secretary in February 1990.
Mr. Pinckert became  Executive Vice President  of Operations in  May 1991  while
retaining  his previous positions.  In June 1993,  Mr. Pinckert became President
and Chief Executive Officer and was  appointed to the Board of Directors.  Prior
to  joining Cholestech, he was Chief Financial Officer for Sunrise Medical Inc.,
an international durable medical equipment manufacturer, from 1983 to 1989.  Mr.
Pinckert  also serves on the Board of  Directors of PacifiCare Health Systems, a
managed care  organization. Mr.  Pinckert earned  a B.S.  in Accounting  and  an
M.B.A.  from the  University of  Southern California  and is  a certified public
accountant.
 
    STEVEN L. BARBATO joined the Company  as Vice President of Manufacturing  in
May  1992. From 1990  to January 1992,  Mr. Barbato served  as Vice President of
Operations  of  the  Pandex  Division  of  Baxter  Diagnostics,  Inc.   ("Baxter
Diagnostics"),  a biotechnical  instrument and reagent  development division and
served in other capacities at Baxter Diagnostics from January 1992 to May  1992.
From  1989 to  1990, Mr.  Barbato served  as Director  of Manufacturing  for the
Paramax Chemistry  Division  of  Baxter Diagnostics,  a  division  manufacturing
automated  whole blood analyzers. From 1987 to 1989, Mr. Barbato was employed as
Manager of  Manufacturing by  the  Pandex Division  of Baxter  Diagnostics.  Mr.
Barbato  earned a B.S. in Chemical  Engineering from Northeastern University and
an M.B.A. from Xavier University.
 
    GARY E. HEWETT, a co-founder of the Company, has served as Vice President of
Diagnostic Development since the Company's inception in 1988. From 1985 to 1988,
Mr. Hewett was  employed by  Genelabs, Inc.,  a biotechnology  company, as  Vice
President  of  Diagnostics. Prior  to  1985, he  was  employed in  a  variety of
management  and   technical  positions   at  the   following  companies:   Cetus
Corporation,  a biotechnology firm, from 1983 to 1985; Molecular Design, Inc., a
computer software  company, from  1980  to 1983;  Beckman Instruments,  Inc.,  a
clinical instrument company, from 1978 to 1983; and Durrum Instrument (Dionics),
an  analytical instrument firm, from  1975 to 1978. Mr.  Hewett earned a B.A. in
Neurophysiology from the University of California, Berkeley.
 
    RICHARD H. JANNEY  joined the Company  in September 1992  as Controller  and
became  Vice President  of Finance  and Chief  Financial Officer  in March 1995.
Prior to joining the Company, he was employed by Price Waterhouse LLP from  1984
to  September 1992.  Mr. Janney  earned a  B.S. in  Business Administration from
California Polytechnic State University  at San Luis Obispo  and is a  certified
public accountant.
 
    HARVEY S. SADOW, PH.D. has been a Director of the Company since January 1990
and  has  served as  Chairman of  the Board  of Directors  of the  Company since
February 1992. He was President and Chief
 
                                       44
<PAGE>
Executive Officer of  Boehringer Ingelheim Corporation,  a health care  company,
from 1971 to 1988, and of Boehringer Ingelheim Pharmaceuticals, Inc., an ethical
specialty   pharmaceutical  company,  from  1984  to  1988.  In  1988  upon  his
retirement, he became  Chairman of  the Board  of Directors  of both  Boehringer
Ingelheim  Corporation and Boehringer Ingelheim  Pharmaceuticals, Inc. Dr. Sadow
retired as Chairman of both companies in December 1990 and remained on the Board
of Directors of both companies until December 1992. From 1967 to 1971, Dr. Sadow
was Senior  Vice President,  Scientific Affairs,  of the  U.S.V.  Pharmaceutical
Corporation,  Revlon Health  Care Division.  He also  serves as  Chairman of the
Board of Directors of Cortex Pharmaceuticals, Inc., a neuroscience company; as a
director of Anika  Research Corporation, a  research company; as  a director  of
Cytel   Corporation,   a  pharmaceutical   company;   a  director   of  Houghten
Pharmaceutical Inc., a pharmaceutical  company; and as  a director of  Penederm,
Inc.,  a dermatologic product company. Dr. Sadow earned a B.S. from the Virginia
Military Institute, an M.S. from the University  of Kansas and a Ph.D. from  the
University of Connecticut.
 
    JOSEPH  BUCHMAN, M.D. has been a Director of the Company since July 1994. He
is a practicing  physician with a  private practice in  Ridgefield and  Danbury,
Connecticut. He is a certified member of the American Board of Internal Medicine
and  Cardiovascular Disease. Dr. Buchman is currently director of the Preventive
Cardiology Program for Danbury Hospital Health  Services, and has been a  member
of  the  Cardiothoracic  and  Vascular  Group,  a  professional  corporation  in
Ridgefield, Connecticut  since 1992.  Prior to  1992, Dr.  Buchman maintained  a
private  medical practice.  Dr. Buchman has  published numerous  articles on the
subject of  coronary risk  factors.  Dr. Buchman  earned  a B.A.  from  Wesleyan
University and a M.D. from New York University, College of Medicine.
 
    JOHN L. CASTELLO has been a Director of the Company since August 1993. He is
the  Chairman  of  the Board,  President  and  Chief Executive  Officer  of Xoma
Corporation ("Xoma"),  a biotechnology  company. He  joined Xoma  in April  1992
after serving as President and Chief Operating Officer of the Ares Serono Group,
a  Swiss ethical pharmaceutical company, from 1988  to August 1991, and prior to
that he was President of the Serano Diagnostics Division from 1986 to 1988. From
1977 to  1986,  Mr.  Castello  held  senior  management  positions  at  Amersham
International PLC and Abbott Laboratories. Mr. Castello also serves on the Board
of  Directors of Metra Biosystems, Inc. Mr. Castello earned a B.S. in Mechanical
and Industrial Engineering from Notre Dame University.
 
    H. R. SHEPHERD has been a director of  the Company since July 1994. He is  a
special  advisor to  the Chairman of  the Board  of Directors of  Medeva PLC, an
international pharmaceuticals  company, and  is a  founder and  Chairman of  the
Board of the Albert B. Sabin Vaccine Foundation. Mr. Shepherd served as Chairman
and Chief Executive Officer of Armstrong Pharmaceuticals, a company specializing
in  aerosol pharmaceutical  packaging and  labeling, from  1985 to  August 1993,
before it was acquired by  Medeva PLC. Mr. Shepherd  earned a B.S. from  Cornell
University and a Honorary Doctorate of Humane Letter from Villanova University.
 
    All  directors are elected  at each annual meeting  of shareholders and hold
office until the  election and  qualification of  their successors  at the  next
annual  meeting of shareholders. Officers of the Company serve at the discretion
of the Board of Directors. There are no family relationships among the Company's
directors and executive officers.
 
DIRECTORS' COMPENSATION
 
    Nonemployee directors who  do not represent  shareholders holding more  than
one percent of the outstanding shares ("Outside Directors") receive a $1,000 fee
for  each meeting  of the  Board of  Directors attended.  Outside Directors also
receive a  $500 fee  for each  meeting of  the Audit  or Compensation  Committee
attended  that is not in conjunction with  a regular board meeting. In addition,
the 1988 Stock Incentive Program provides that options to purchase the Company's
Common Stock may be granted to
 
                                       45
<PAGE>
Outside  Directors pursuant  to a  nondiscretionary, automatic  grant mechanism,
whereby each such director is granted an option to purchase 10,000 shares on the
date of each annual meeting of  shareholders. Pursuant to the provisions of  the
1988  Stock Incentive  Program, in  August 1995  Dr. Buchman,  Mr. Castello, Dr.
Sadow and Mr. Shepherd were each granted nonstatutory options to purchase 10,000
shares of the Company's Common  Stock at an exercise  price of $2.25 per  share.
See "-- 1988 Stock Incentive Program."
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
    The   Compensation  Committee  is   responsible  for  determining  salaries,
incentives and other  forms of  compensation for directors,  officers and  other
employees  of  the Company  and administers  various incentive  compensation and
benefit plans.  The  Compensation  Committee consists  of  directors  Sadow  and
Castello.   There  are  no  interlocking  relationships,  as  described  by  the
Securities and Exchange Commission, between the Compensation Committee  members.
See "-- 1988 Stock Incentive Program" and "-- Employee Stock Purchase Plan."
 
EXECUTIVE COMPENSATION
 
    The  following table sets forth  for the fiscal years  ended March 31, 1996,
1995 and 1994, compensation awarded to, paid to or earned by, (i) the  Company's
Chief Executive Officer and (ii) the Company's next four most highly compensated
executive  officers whose salary  and bonus exceeded  $100,000 during the fiscal
year ended March 31, 1996 (the "Named Executive Officers").
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                                               LONG-TERM
                                                                                              COMPENSATION
                                                                                                 AWARDS
                                                        ANNUAL COMPENSATION                  --------------
                                         --------------------------------------------------    SECURITIES
                                                                             OTHER ANNUAL      UNDERLYING         ALL OTHER
      NAME AND PRINCIPAL POSITION          YEAR     SALARY($)   BONUS($)   COMPENSATION(1)     OPTIONS(#)    COMPENSATION(2)($)
- ---------------------------------------  ---------  ----------  ---------  ----------------  --------------  -------------------
<S>                                      <C>        <C>         <C>        <C>               <C>             <C>
Warren E. Pinckert II(3) ..............       1996  $  145,440  $  --         $   --              10,000          $   6,050
 President and Chief                          1995     153,333     --             --             249,958(5)           6,143
 Executive Officer                            1994     155,833     10,000         --             209,958              6,193
Gary E. Hewett ........................       1996     131,191     --             39,336           --                 1,863
 Vice President of Diagnostic                 1995     130,000     10,000          4,278          70,000(5)           4,255
 Development                                  1994     130,000     --             11,605           --                 4,055
Linda H. Masterson(4) .................       1996     131,000     --             19,967           5,000              2,289
 Executive Vice President of Marketing        1995     114,750     --             17,922          90,000              2,063
 and Sales                                    1994      --         --             --               --                --
Steven L. Barbato .....................       1996     106,050     --             --               3,000              5,914
 Vice President of                            1995     104,167     10,000         25,350          45,000(6)           5,971
 Manufacturing                                1994      95,000      6,891         36,075          10,000              6,048
</TABLE>
 
- --------------
(1) The amounts  described hereunder  were paid by  the Company  as follows:  In
    fiscal 1996, to Mr. Hewett, $35,640 for forgiveness of a loan and $3,696 for
    the  compensation  paid  in  connection  with  the  Company's  Research  and
    Development Incentive Program; and to Ms. Masterson, $14,545 for  relocation
    expenses  and  $5,422  for  income taxes  paid  on  nonreimbursed relocation
    expense. In fiscal 1995, to Mr. Hewett $2,851 and $917 for forgiveness of  a
    loan and income taxes paid on the forgiveness of the loan, respectively, and
    $510 for the compensation paid in connection with the Company's Research and
    Development  Incentive  Program;  to Ms.  Masterson  $17,922  for relocation
 
                                       46
<PAGE>
    expenses; and to  Mr. Barbato $25,350  for the forgiveness  of a  relocation
    loan.  In fiscal 1994, to Mr. Hewett  $8,554 and $3,051 for forgiveness of a
    loan and income taxes paid on the forgiveness of the loan, respectively; and
    to Mr. Barbato $36,078 for the forgiveness of a relocation loan.
 
(2) The amounts  described hereunder were  paid by the  Company for premiums  on
    group term life insurance and medical and dental insurance.
 
(3) In October 1994, Mr. Pinckert voluntarily reduced his compensation by 10%.
 
(4)  Ms. Masterson joined the Company in May 1994 and resigned as Executive Vice
    President of Marketing and Sales in April 1996.
 
(5) Represents options granted pursuant  to an option exchange program  approved
    by  the Board of  Directors in August  1994. See description  under "-- 1988
    Stock Incentive Program."
 
(6) Includes 35,000  shares subject  to options  granted pursuant  to an  option
    exchange  program approved  by the  Board of  Directors in  August 1994. See
    description under "-- 1988 Stock Incentive Program."
 
                              STOCK OPTION GRANTS
 
    The following table provides information  relating to stock options  awarded
to  each of the Named Executive Officers  during the fiscal year ended March 31,
1996. All such  options were awarded  under the Company's  1988 Stock  Incentive
Program.
 
                       OPTION GRANTS IN LAST FISCAL YEAR
 
<TABLE>
<CAPTION>
                                                                                                      POTENTIAL REALIZABLE
                                                                                                        VALUE AT ASSUMED
                                                              INDIVIDUAL GRANTS                         ANNUAL RATES OF
                                          ----------------------------------------------------------      STOCK PRICE
                                           NUMBER OF   PERCENT OF TOTAL                                 APPRECIATION FOR
                                          UNDERLYING    OPTIONS GRANTED     EXERCISE                     OPTION TERM(5)
                                            OPTIONS     TO EMPLOYEES IN     PRICE PER    EXPIRATION   --------------------
                  NAME                    GRANTED(#)    FISCAL YEAR(1)     SHARE(2)(3)     DATE(4)      5%($)     10%($)
- ----------------------------------------  -----------  -----------------  -------------  -----------  ---------  ---------
<S>                                       <C>          <C>                <C>            <C>          <C>        <C>
Warren E. Pinckert II...................      10,000            4.7%        $    2.25      10/30/00   $   6,216  $  13,736
Linda H. Masterson(6)...................       5,000            2.3              2.25      10/30/00         563      1,125
Steven L. Barbato.......................       3,000            1.4              2.25      10/30/00       1,865      4,121
Gary E. Hewett(7).......................      --              --               --            --          --         --
</TABLE>
 
- --------------
(1)  Based  on an  aggregate of  212,923  options granted  under the  1988 Stock
    Incentive Program.
 
(2) Options were granted at an exercise price equal to the fair market value  of
    the  Company's Common Stock, as determined by  the Board of Directors on the
    date of grant.
 
(3) Exercise price may be paid in  cash, check, promissory note, by delivery  of
    already-owned  shares  of  the  Company's Common  Stock  subject  to certain
    conditions, or pursuant  to a  cashless exercise procedure  under which  the
    optionee  provides irrevocable instructions to a  brokerage firm to sell the
    purchased shares and to remit to the  Company, out of the sale proceeds,  an
    amount equal to the exercise price plus all applicable withholding taxes.
 
(4)  The  stock options  granted in  the fiscal  year ended  March 31,  1996 are
    exercisable starting three months after the date of grant, with 6.25% of the
    shares covered  thereby  becoming  exercisable  at that  time  and  with  an
    additional  6.25% of  the option shares  becoming exercisable at  the end of
    each three  month period  thereafter,  with full  vesting occurring  on  the
    fourth  anniversary of  the date  of grant.  Under the  1988 Stock Incentive
    Program, the Board retains the discretion to modify the terms, including the
    price, of outstanding options.
 
(5) Potential realizable value is based on the assumption that the Common  Stock
    of  the Company appreciates  at the annual  rate shown (compounded annually)
    from the date of grant until the
 
                                       47
<PAGE>
    expiration of the five year option term. These numbers are calculated  based
    on  the requirements promulgated  by the Securities  and Exchange Commission
    and do not reflect the Company's estimate of future stock price growth.
 
(6) Ms. Masterson resigned as Executive Vice President of Marketing and Sales in
    April 1996.
 
(7) Mr. Hewett is eligible to receive cash bonuses under the Company's  Research
    and Development Incentive Program.
 
    The following table sets forth certain information regarding the exercise of
stock options by the Named Executive Officers during the fiscal year ended March
31,  1996 and  stock options held  as of March  31, 1996 by  the Named Executive
Officers.
 
       OPTION EXERCISES IN FISCAL 1996 AND FISCAL YEAR-END OPTION VALUES
 
<TABLE>
<CAPTION>
                                                             NUMBER OF SECURITIES        VALUE OF UNEXERCISED
                                   SHARES                   UNDERLYING UNEXERCISED       IN-THE-MONEY OPTIONS
                                  ACQUIRED      VALUE             OPTIONS(#)                    ($)(2)
                                 ON EXERCISE   REALIZED   --------------------------  --------------------------
             NAME                    (#)        ($)(1)    EXERCISABLE  UNEXERCISABLE  EXERCISABLE  UNEXERCISABLE
- -------------------------------  -----------  ----------  -----------  -------------  -----------  -------------
<S>                              <C>          <C>         <C>          <C>            <C>          <C>
Warren E. Pinckert II..........       1,470   $    2,279     179,972        98,111     $ 562,847    $   312,232
Linda H. Masterson(3)..........      --           --          35,937        59,063       128,199        222,285
Steven L. Barbato..............      --           --          29,562        18,438        93,125         65,148
Gary E. Hewett.................      20,827      125,678      77,499        17,501       249,879         53,605
</TABLE>
 
- --------------
(1) Market value of underlying securities at date of exercise less the  exercise
    price,  but  does  not  necessarily  indicate  that  the  optionee  sold the
    underlying stock.
 
(2) Fair  market value  of the  Common  Stock as  of March  31, 1996  minus  the
    exercise price.
 
(3) Ms. Masterson resigned as Executive Vice President of Marketing and Sales in
    April 1996.
 
1988 STOCK INCENTIVE PROGRAM
 
    The  Company's  1988  Stock  Incentive Program  (the  "Option  Program") was
adopted in  1988. The  Option Program  provides for  the granting  to  employees
(including  officers and employee  directors) of incentive  stock options within
the meaning of Section 422 of the Internal Revenue Code of 1986, as amended, and
the granting of  nonstatutory stock options  to employees (including  officers),
directors  and consultants. The purpose of the  Option Program is to attract and
retain the best available personnel  to the Company and  to give them a  greater
personal  stake in the  success of the  Company. A total  of 1,550,000 shares of
Common Stock has been reserved for issuance under the Program.
 
    The Option Program is currently  administered by the Compensation  Committee
of  the Board of  Directors, which determines  the terms of  the options granted
under the Option Program, including the exercise price, number of shares subject
to the  option and  the exercisability  thereof. Generally,  options granted  to
employees  and consultants under the Option  Program vest and become exercisable
at a rate of 6.25% of the shares  subject to the option per quarter but may  not
be  exercised  prior to  one year  from  the commencement  of employment  or the
consultant  relationship.  The  terms  of   all  incentive  stock  options   and
nonstatutory  stock options granted under the  Option Program may not exceed ten
years and one day, although the Company generally grants options with five  year
terms.  However, the terms of all incentive stock options and nonstatutory stock
options  granted  to  an  optionee  who,  at  the  time  of  grant,  owns  stock
representing  more than  10% of the  voting rights of  the Company's outstanding
capital stock, may  not exceed five  years. No option  granted under the  Option
Program  may be transferred  by the optionee other  than by will  or the laws of
descent or distribution and each option may be exercised, during the lifetime of
the optionee, only by  such optionee. In  the event of a  merger of the  Company
with or into another corporation or a sale of substantially all of the Company's
assets,  each option will be assumed or  an equivalent option substituted by the
successor corporation unless the Compensation
 
                                       48
<PAGE>
Committee accelerates  the exercisability  of all  outstanding options.  Options
granted  to executive officers  and directors provide  that all unvested options
are accelerated  to vest  fully upon  the  sale, merger  or liquidation  of  the
Company.
 
    The  exercise price of all incentive  stock options granted under the Option
Program must be at  least equal to the  fair market value of  the shares on  the
date  of grant. With respect  to any participant who  owns stock possessing more
than 10% of the  voting rights of the  Company's outstanding capital stock,  the
exercise price of any incentive stock option granted must equal at least 110% of
the  fair market  value on  the grant  date. No  incentive stock  options may be
granted to a participant, which, when aggregated with all other incentive  stock
options  granted to such participant, would  have an aggregate fair market value
in excess of $100,000  becoming exercisable in any  calendar year. The  exercise
price of all nonstatutory stock options granted under the Option Program must be
at  least 85% of the fair market value of the Common Stock on the date of grant.
No options have been granted to date at prices less than 100% of the fair market
value on the date of grant.
 
    The Option  Program provides  that options  may not  be granted  to  Outside
Directors  who represent  significant shareholders. The  Option Program provides
that  options  may  be  granted  to   Outside  Directors  only  pursuant  to   a
nondiscretionary,  automatic grant  mechanism, whereby each  Outside Director is
automatically granted an option  to purchase 10,000 shares  on the date of  each
annual  meeting  of  shareholders. Each  new  Outside Director  that  becomes an
Outside Director within six months after an annual meeting of shareholders  will
automatically  be granted an option  to purchase 10,000 shares  upon the date on
which such person first becomes an Outside Director. Options granted to  Outside
Directors  have an exercise price  equal to the fair market  value of a share of
Common Stock on the date of grant and vest at a rate of 25% per calendar quarter
following the date of grant  so long as the optionee  remains a director of  the
Company.
 
    In  August  1994,  the  Compensation Committee  of  the  Board  of Directors
implemented a Stock  Option Exchange  Program (the "Exchange  Program") for  all
current  employees and consultants, including  the executive officers. Under the
Exchange Program all current employees and consultants owning stock options with
an exercise price  greater than $3.50  per share were  given the opportunity  to
exchange  their stock options for new options  having an exercise price of $3.50
per share. At the time of  the Committee action approving the Exchange  Program,
the  market value of the Company's common stock was $2.50 per share. In exchange
for the  opportunity to  exchange  stock options,  each employee  or  consultant
forfeited  approximately  25% of  his or  her  then-current vesting  credit. The
Compensation Committee took this action  to maintain morale across the  Company,
to  help  maintain  momentum  in  the development  projects  and  to  retain key
contributors in all areas of the Company, including the executive officers.
 
    As of  March  31, 1996,  490,905  shares of  Common  Stock had  been  issued
pursuant  to stock purchase rights or upon exercise of options granted under the
Option Program, options to purchase 875,683 shares of Common Stock at a weighted
average exercise price of  $3.29 per share were  outstanding and 183,412  shares
remained available for future option grants under the Program.
 
EMPLOYEE STOCK PURCHASE PLAN
 
    The Company's Employee Stock Purchase Plan (the "Purchase Plan") was adopted
by  the Board of Directors  and approved by the  Company's shareholders in April
1992. The Purchase Plan is intended to qualify under Section 423 of the Internal
Revenue Code of 1986, as amended. A total of 200,000 shares of Common Stock  has
been  reserved  for issuance  under  the Purchase  Plan.  The Purchase  Plan has
offering periods  of  approximately six  months,  commencing on  or  after  each
January  1 and  July 1.  The Purchase Plan  is administered  by the Compensation
Committee of  the  Board  of  Directors.  The  Purchase  Plan  permits  eligible
employees  to purchase  Common Stock through  payroll deductions,  which may not
exceed 15% of  an employee's compensation.  No employee may  purchase more  than
$25,000  worth of Common Stock  in any calendar year.  Employees are eligible to
participate if they are employed by the
 
                                       49
<PAGE>
Company or a subsidiary of the Company designated by the Board of Directors  for
at  least 20 hours per week and have  been so employed for more than five months
in a calendar year. The price of stock purchased under the Purchase Plan is  85%
of  the lower of (i) the fair market  value of the Common Stock at the beginning
of the offering period or (ii) the fair market value of the Common Stock at  the
end  of  the  offering period.  Employees  may  end their  participation  in the
offering at  any  time  during  the  offering  period,  and  participation  ends
automatically on termination of employment with the Company.
 
401(K) PLAN
 
    Effective  in September 1990, the Company adopted the Cholestech Corporation
Retirement Savings Plan (the "401(k)  Plan") that covers all eligible  employees
of the Company. During calendar 1995, an eligible employee could elect to defer,
in the form of contributions to the 401(k) Plan, between 1% and 15% of the total
compensation  that would otherwise be paid to the employee, not to exceed $9,240
per year  (adjusted for  cost-of-living increases).  During calendar  1996,  the
maximum  deferral election has increased to $9,500. Employees' contributions are
invested in selected equity mutual funds, a guaranteed interest contract account
or a  money  market fund  according  to the  directions  of the  employees.  The
contributions  are fully vested and nonforfeitable at all times. The 401(k) Plan
provides for employer  contributions as  determined by the  Board of  Directors.
Through March 31, 1996, the Company had not made any contributions to the 401(k)
Plan.
 
EMPLOYMENT AGREEMENTS
 
    Pursuant  to an employment  agreement with the Company  entered into in June
1993, Mr. Pinckert  was entitled  to receive an  initial annual  base salary  of
$160,000  for fiscal 1996  versus the $145,440 he  actually received. In October
1994 Mr. Pinckert  voluntarily reduced  his base salary  by 10%  to $144,000  in
order  to lower the operating  costs of the Company.  The Board of Directors has
approved a twelve-month wage and benefits continuation package for Mr.  Pinckert
in the event he is terminated from the Company.
 
    The   Board  of  Directors  has  approved  a  six-month  wage  and  benefits
continuation package  for  Mr.  Barbato and  Mr.  Janney  in the  event  of  the
involuntary  termination of their employment with  the Company. In addition, the
Board of Directors  has approved  a three-month wage  and benefits  continuation
package  for  Mr. Hewett  in the  event  of the  involuntary termination  of his
employment with the Company.
 
LIMITATIONS ON LIABILITY AND INDEMNIFICATION MATTERS
 
    The Company has adopted provisions in its Restated Articles of Incorporation
that eliminate  to  the fullest  extent  permissible under  California  law  the
liability  of its directors to the Company for monetary damages. Such limitation
of liability does  not affect  the availability  of equitable  remedies such  as
injunctive  relief or rescission. The Company's  Bylaws provide that the Company
shall indemnify its directors  and officers to the  fullest extent permitted  by
California law, including in circumstances in which indemnification is otherwise
discretionary under California law. The Company has entered into indemnification
agreements  with  its officers  and  directors containing  provisions  which may
require the Company, among other things, to indemnify the officers and directors
against certain liabilities that may arise by reason of their status or  service
as directors or officers (other than liabilities arising from willful misconduct
of a culpable nature), and to advance their expenses incurred as a result of any
proceeding against them as to which they could be indemnified.
 
    There is no currently pending litigation or proceeding involving a director,
officer,  employee or other agent of  the Company in which indemnification would
be required or permitted. The Company is not aware of any threatened  litigation
or proceeding which may result in a claim for such indemnification.
 
                                       50
<PAGE>
                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
    In  April 1988, the Company granted a  loan to Mr. Hewett in connection with
his purchase of 35,640 shares of the Company's Common Stock pursuant to a  stock
purchase agreement. The loan was evidenced by a promissory note in the amount of
$35,640  due in April  1993, which bore interest  at the annual  rate of 8%. The
loan was secured in November 1989 by independent collateral. In September  1991,
the  Board of Directors approved the forgiveness of the loan in the event of the
involuntary termination of  Mr. Hewett's  employment with the  Company. In  June
1993,  the  Board  of Directors  approved  an  amendment to  the  loan agreement
providing for forgiveness of the principal loan balance in April 1995 as long as
Mr. Hewett  remained employed  by the  Company until  such time.  The  remaining
balance of the loan, $35,640, was forgiven in April 1995.
 
    In  April 1992,  the Company entered  into an employment  agreement with Mr.
Barbato providing  for  certain  relocation  benefits,  including  the  cost  of
alternative  housing for up  to six months  until his prior  residence was sold,
reimbursement of moving expenses  and closing costs upon  the sale of his  prior
residence,  and a bridge loan  to assist the purchase of  a new residence in the
event such purchase  occurred before the  sale of his  prior residence. In  July
1992,  Mr. Barbato executed a promissory note evidencing a $100,000 bridge loan.
This interest free promissory note was repaid  in full in October 1992. In  July
1992,  Mr. Barbato  borrowed $65,000 from  the Company pursuant  to a promissory
note. This promissory note bears  interest at a rate of  8.0% per annum and  was
due  September 1994. This promissory note  provided for quarterly forgiveness of
$8,125 of  the  outstanding  balance  and any  accrued  interest  as  additional
compensation as long as Mr. Barbato remained employed with the Company. The loan
was forgiven in full as of March 31, 1995.
 
    All  future  transactions,  including  loans, between  the  Company  and its
officers,  directors,  principal  shareholders  and  their  affiliates  will  be
approved  by a majority of  the Board of Directors,  including a majority of the
independent and disinterested outside  directors, and will be  on terms no  less
favorable to the Company than could be obtained from unaffiliated third parties.
 
                                       51
<PAGE>
                             PRINCIPAL SHAREHOLDERS
 
    The  following  table sets  forth certain  information  with respect  to the
beneficial ownership of the Common Stock as of March 31, 1996 and as adjusted to
reflect the  sale  of  the  3,000,000 shares  of  Common  Stock  offered  hereby
(assuming  no exercise of  the Underwriters over-allotment  option): (i) by each
Director, (ii)  by  each of  the  Named Executive  Officers,  and (iii)  by  all
Directors  and executive officers as  a group. The Company  does not know of any
person that is the beneficial owner of more than 5% of the outstanding shares of
Common Stock. Except  as otherwise noted,  the shareholders named  in the  table
have sole voting and investment power with respect to all shares of Common Stock
shown  as beneficially owned  by them, subject  to applicable community property
laws.
 
<TABLE>
<CAPTION>
                                                                                                PERCENTAGE BENEFICIALLY
                                                                                                        OWNED(2)
                                                                                   SHARES     ----------------------------
                                                                                 BENEFICIALLY    BEFORE          AFTER
BENEFICIAL OWNER(1)                                                               OWNED(2)      OFFERING       OFFERING
- -------------------------------------------------------------------------------  -----------  -------------  -------------
<S>                                                                              <C>          <C>            <C>
Warren E. Pinckert II (3)......................................................     277,838          3.4%           2.5%
Harvey S. Sadow, Ph.D. (4).....................................................      55,723         *              *
John L. Castello (5)...........................................................      27,500         *              *
Joseph Buchman (6).............................................................      17,500         *              *
H.R. Shepherd (7)..............................................................      17,500         *              *
Gary E. Hewett (8).............................................................     136,880          1.7            1.2
Linda H. Masterson (9).........................................................      49,602         *              *
Steve L. Barbato (10)..........................................................      32,562         *              *
                                                                                    626,135          7.6            5.4
All current Directors and executive officers as a group (9 persons) (11).......
</TABLE>
 
- --------------
     Less*than one percent.
 
       (1)
     The addresses of the persons set forth above is the address of the  Company
     appearing elsewhere in this Prospectus.
 
       (2)
     This  table is based  upon information supplied  by officers, directors and
     principal shareholders.  Applicable percentage  of  ownership is  based  on
     8,131,824  shares of Common Stock outstanding as of March 31, 1996 together
     with applicable  options  for  such shareholder.  Beneficial  ownership  is
     determined  in accordance  with the  rules of  the Securities  and Exchange
     Commission, and  includes  voting  and investment  power  with  respect  to
     shares.  Shares of  Common Stock subject  to options  or warrants currently
     exercisable or exercisable within 60 days  after March 31, 1996 are  deemed
     outstanding  for computing the  percentage ownership of  the person holding
     such options or warrants, but are not deemed outstanding for computing  the
     percentage of any other person.
 
       (3)
     Includes  196,221 shares of Common Stock issuable pursuant to stock options
     exercisable within 60 days after March 31, 1996.
 
       (4)
     Includes 48,595 shares of Common  Stock issuable pursuant to stock  options
     exercisable within 60 days after March 31, 1996.
 
       (5)
     Represents 27,500 shares of Common Stock issuable pursuant to stock options
     exercisable within 60 days after March 31, 1996.
 
       (6)
     Represents 17,500 shares of Common Stock issuable pursuant to stock options
     exercisable within 60 days after March 31, 1996.
 
       (7)
     Represents 17,500 shares of Common Stock issuable pursuant to stock options
     exercisable within 60 days after March 31, 1996.
 
       (8)
     Includes  81,874 shares of Common Stock  issuable pursuant to stock options
     exercisable within 60 days after March 31, 1996.
 
       (9)
     Includes 41,875 shares of Common  Stock issuable pursuant to stock  options
     exercisable within 60 days after March 31, 1996.
 
      (10)
     Represents 32,562 shares of Common Stock issuable pursuant to stock options
     exercisable within 60 days after March 31, 1996.
 
      (11)
     Includes  474,376 shares of Common Stock issuable pursuant to stock options
     exercisable within 60 days after March 31, 1996.
 
                                       52
<PAGE>
                          DESCRIPTION OF CAPITAL STOCK
 
GENERAL
 
    The Company's Restated Articles of Incorporation provide that the authorized
capital stock of the Company is 25,000,000 shares of Common Stock, no par value,
and 5,000,000 shares of undesignated Preferred Stock, no par value. As of  March
31, 1996, 8,131,824 shares of Common Stock and no shares of Preferred Stock were
outstanding.  As  of  May 7,  1996,  there were  309  holders of  record  of the
Company's Common Stock.
 
COMMON STOCK
 
    The issued and  outstanding shares of  Common Stock are,  and the shares  of
Common  Stock being offered by the Company hereby will be upon payment therefor,
validly issued, fully paid and nonassessable. Subject to the prior rights of the
holders of any  Preferred Stock,  the holders  of outstanding  shares of  Common
Stock are entitled to receive dividends out of assets legally available therefor
at  such times and  in such amounts as  the Board of Directors  may from time to
time  determine.  The  shares  of  Common  Stock  are  neither  redeemable   nor
convertible and the holders thereof have no preemptive or subscription rights to
purchase any securities of the Company. Upon liquidation, dissolution or winding
up  of the Company, the holders of Common Stock are entitled to receive pro rata
the assets of the  Company which are legally  available for distribution,  after
payment  of all debts and  other liabilities and subject  to the prior rights of
any holders  of Preferred  Stock  then outstanding.  Each outstanding  share  of
Common  Stock is  entitled to  one vote on  all matters  submitted to  a vote of
stockholders and have cumulative voting rights  with respect to the election  of
directors.
 
WARRANTS
 
    As  of  March  31, 1996,  there  were  outstanding warrants  to  purchase an
aggregate of 39,242 shares  of Common Stock  at an exercise  price of $3.50  per
share. Such warrants expire on July 15, 1999.
 
PREFERRED STOCK
 
    The  Company  is  authorized  to  issue  5,000,000  shares  of  undesignated
Preferred Stock. The Board of Directors has the authority to issue the Preferred
Stock in  one  or  more  series  and to  fix  the  price,  rights,  preferences,
privileges  and restrictions thereof, including dividend rights, dividend rates,
conversion rights,  voting  rights,  terms  of  redemption,  redemption  prices,
liquidation  preferences and the  number of shares constituting  a series or the
designation of such series, without any further vote or action by the  Company's
shareholders.  The  issuance  of  Preferred  Stock,  while  providing  desirable
flexibility  in  connection  with  possible  acquisitions  and  other  corporate
purposes, could have the effect of delaying, deferring or preventing a change in
control  of  the Company  without  further action  by  the shareholders  and may
adversely affect the market price  of, and the voting  and other rights of,  the
holders of Common Stock. The Company has no current plans to issue any shares of
Preferred Stock.
 
REGISTRATION RIGHTS
 
    Metra  Biosystems holds 39,526 shares of Common Stock and has the obligation
to purchase $750,000 of  additional shares of Common  Stock upon achievement  of
certain  milestones  by  the Company  pursuant  to a  development  and licensing
agreement. The  aggregate number  of shares  to be  purchased is  determined  by
dividing  the milestone payment by a weighted average trading price based on the
five day trading period prior to  the completion of the milestone  (collectively
the  "Registrable Securities"). Metra Biosystems  or its transferees is entitled
to certain rights  with respect  to the registration  of such  shares under  the
Securities  Act of 1933  (the "Securities Act").  Beginning May 6,  1997, if the
Company proposes to  register any of  its securities under  the Securities  Act,
either for its own account or the account
 
                                       53
<PAGE>
of  other  securityholders,  Metra  Biosystems is  entitled  to  notice  of such
registration  and  is  entitled  to  include  Registrable  Securities   therein,
provided,  among other conditions, that between May 6, 1997 and May 6, 1998, the
Company shall only be required to  include in such registration one-half of  the
Registrable  Securities. In addition, Metra  Biosystems may require the Company,
beginning May 6, 1997, on not more than two occasions in any 12 month period  to
file  a registration  statement on  Form S-3  under the  Securities Act,  at the
Company's expense,  with  respect to  all  of the  Registrable  Securities.  The
Company is required to use its best efforts to affect such registration, subject
to  certain conditions and  limitations. Further, in  the event Metra Biosystems
requests a registration on Form S-3 and the Company is not then entitled to  use
Form  S-3, then Metra Biosystems may require  the Company to file a registration
statement on Form  S-1 at  the Company's  expense, with  respect to  all of  the
Registrable  Securities.  The Company  is required  to use  its best  efforts to
effect such registration,  subject to  certain conditions  and limitations.  The
registration  rights of Metra Biosystems terminate  upon the earlier to occur of
May 6, 2001 or at such time as Metra Biosystems is able to dispose of all of the
Registrable Securities in one three-month period pursuant to provisions of  Rule
144.
 
TRANSFER AGENT
 
    The transfer agent for the Common Stock is Wells Fargo Bank, N.T.&N.A.
 
                                       54
<PAGE>
                                  UNDERWRITING
 
    Subject  to  the terms  and conditions  of  the Underwriting  Agreement, the
underwriters (the  "Underwriters")  named  below,  for  whom  Vector  Securities
International,  Inc.  and Principal  Financial  Securities, Inc.  are  acting as
representatives (the  "Representatives"),  have severally  agreed  to  purchase,
subject  to  the terms  and conditions  of the  Underwriting Agreement,  and the
Company has agreed to sell to the Underwriters, the following respective  number
of shares of Common Stock.
 
<TABLE>
<CAPTION>
UNDERWRITERS                                                                           NUMBER OF SHARES
- -------------------------------------------------------------------------------------  -----------------
<S>                                                                                    <C>
Vector Securities International, Inc.................................................
Principal Financial Securities, Inc..................................................
 
                                                                                             --------
  Total..............................................................................       3,000,000
                                                                                             --------
                                                                                             --------
</TABLE>
 
    The Underwriting Agreement provides that the obligations of the Underwriters
are  subject  to  certain conditions  precedent,  including the  absence  of any
material adverse change  in the Company's  business and the  receipt of  certain
certificates,  opinions and letters from the Company and its counsel. The nature
of the Underwriters' obligation is such that they are committed to purchase  all
shares of Common Stock offered hereby if any such shares are purchased.
 
    The Underwriters propose to offer the shares of Common Stock directly to the
public  at  the  public offering  price  set forth  on  the cover  page  of this
Prospectus, and to certain dealers at such price less a concession not in excess
of $    per share. The  Underwriters may allow, and such dealers may reallow,  a
concession  not in excess of $     per share to certain other dealers. After the
public offering of  the shares  of Common Stock,  the Offering  price and  other
selling terms may be changed by the Representatives.
 
    The  Company has granted  to the Underwriters an  option, exercisable at any
time during the 30-day period after the date of this Prospectus, to purchase  up
to an additional 450,000 shares of Common Stock at the public offering price set
forth  on the  cover page  of this  Prospectus, less  underwriting discounts and
commissions. The Underwriters may exercise such option solely for the purpose of
covering over allotments, if any, in connection with the Offering. To the extent
such option is exercised, each Underwriter will be obligated, subject to certain
conditions, to purchase  approximately the  same percentage  of such  additional
shares  as  the  number  of  shares  of Common  Stock  set  forth  next  to such
Underwriter's name in the  preceding table bears to  the total number of  shares
listed in the table.
 
    The  Offering of the shares is made for delivery when, as and if accepted by
the Underwriters and subject  to prior sale and  to withdrawal, cancellation  or
modification of this Offering without notice. The Underwriters reserve the right
to reject an order for the purchase of shares in whole or in part.
 
    The  Company  has  agreed  to  indemnify  the  Underwriters  against certain
liabilities, including liabilities under the  Securities Act, and to  contribute
to payments the Underwriters may be required to make in respect thereof.
 
    The  executive  officers, directors  and certain  other stockholders  of the
Company have agreed  that they will  not, without the  prior written consent  of
Vector  Securities International, Inc., offer, sell  or otherwise dispose of any
shares of Common Stock, options or warrants to acquire shares of Common Stock or
securities exchangeable for or convertible into shares of Common Stock owned  by
them  for a period of 90 days after the date of this Prospectus. The Company has
agreed that it will not, without the prior written consent of Vector  Securities
International,  Inc., offer, sell  or otherwise dispose of  any shares of Common
Stock, options  or warrants  to acquire  shares of  Common Stock  or  securities
exchangeable  for or convertible into shares of  Common Stock for a period of 90
days after  the date  of this  Prospectus,  except that  the Company  may  grant
additional  options under its stock option plan, issue shares under its employee
stock purchase plan, issue shares to Metra Biosystems pursuant to the  agreement
described  under "Business -- Strategic Relationships"  or issue shares upon the
exercise of outstanding stock options or warrants.
 
    In connection  with the  Offering, certain  Underwriters and  selling  group
members  (if  any) who  are qualifying  registered market  makers on  the Nasdaq
National Market may engage in passive market-
 
                                       55
<PAGE>
making transactions  in  the Common  Stock  on  the Nasdaq  National  Market  in
accordance with Rule 10b-6A under the Securities Exchange Act of 1934 during the
two  business  day period  before  commencement of  sales  in the  Offering. The
passive market making transactions must comply with applicable volume and  price
limits and be identified as such. In general, a passive market maker may display
its  bid  at a  price  not in  excess  of the  highest  independent bid  for the
security. If all independent bids are  lowered below the passive market  maker's
bid,  however, such bid  must then be  lowered when certain  purchase limits are
exceeded. Net purchases  by a  passive market maker  on each  day are  generally
limited  to a  specified percentage of  the passive market  making average daily
trading  volume  in  the  Common  Stock  during  a  price  period  and  must  be
discontinued when such limit is reached. Passive market making may stabilize the
market  price of the  Common Stock at  a level above  that which might otherwise
prevail, and, if commenced, may be discontinued at any time.
 
                                 LEGAL MATTERS
 
    The validity of  the shares of  Common Stock offered  hereby will be  passed
upon  for the  Company by  Wilson Sonsini  Goodrich &  Rosati, P.C.,  Palo Alto,
California. Certain legal matters in connection with the Offering will be passed
upon for the  Underwriters by  Skadden, Arps,  Slate, Meagher  & Flom,  Chicago,
Illinois.
 
                                    EXPERTS
 
    The  balance sheets  as of  March 31,  1995 and  1996 and  the statements of
operations, shareholders' equity and cash flows  for each of the three years  in
the period ended March 31, 1996 and the financial statement schedule included in
this  Prospectus  and  elsewhere in  the  Registration Statement,  have  been so
included in this Prospectus and in the Registration Statement in reliance on the
report of Price Waterhouse LLP, independent accountants, given on the  authority
of said firm as experts in auditing and accounting.
 
    The  statements  in  this Prospectus  under  the captions  "Risk  Factors --
Uncertainty  of  Patent  and  Propriertary  Technology  Protection;  License  of
Technology   of  Third  Parties"  and   "Business  --  Patents  and  Proprietary
Technology" have been reviewed  and approved by  Dehlinger & Associates,  patent
counsel  for the Company, as experts on such matters, and are included herein in
reliance upon that review and approval.
 
                             ADDITIONAL INFORMATION
 
    The Company is subject to  the informational requirements of the  Securities
Exchange  Act of  1934, as amended,  and in accordance  therewith files reports,
proxy  statements  and  other  information  with  the  Securities  and  Exchange
Commission   (the  "Commission").  Such  reports,  proxy  statements  and  other
information can be inspected and copied  at the Public Reference Section of  the
Commission  at Room 1024,  450 Fifth Street,  N.W., Judiciary Plaza, Washington,
D.C. 20549,  and at  the Commission's  following Regional  Offices: Suite  1400,
Northwest  Atrium Center, 500 West Madison  Street, Chicago, Illinois 60661; and
13th Floor, Seven World Trade Center, New  York, New York 10048. Copies of  such
material  can be obtained at prescribed  rates from the Public Reference Section
of the Commission at 450 Fifth  Street, N.W., Judiciary Plaza, Washington,  D.C.
20549.
 
    The  Company has filed with the  Commission a Registration Statement on Form
S-1 under the Securities Act  of 1933 with respect  to the Common Stock  offered
hereby. 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 the Company and such Common Stock, reference is made
to the Registration  Statement and the  exhibits and schedules  filed as a  part
thereof.  Statements  contained in  this Prospectus  as to  the contents  of any
contract or any other document referred to are not necessarily complete. In each
instance, reference is made to the copy of such contract or document filed as an
exhibit to the Registration Statement, and  each such statement is qualified  in
all  respects by such reference. Copies of the Registration Statement, including
exhibits  and  schedules  thereto,  may  be  inspected  without  charge  at  the
Commission's  principal office  in Washington,  D.C., or  obtained at prescribed
rates from the Public Reference Section  of the Commission at 450 Fifth  Street,
N.W., Judiciary Plaza, Washington, D.C. 20549.
 
                                       56
<PAGE>
                         INDEX TO FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                                                               PAGE
                                                                                                             ---------
<S>                                                                                                          <C>
Report of Independent Accountants..........................................................................        F-2
Balance Sheets.............................................................................................        F-3
Statements of Operations...................................................................................        F-4
Statement of Changes in Shareholders' Equity...............................................................        F-5
Statements of Cash Flows...................................................................................        F-6
Notes to Financial Statements..............................................................................        F-7
</TABLE>
 
                                      F-1
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
To the Board of Directors and
Shareholders of Cholestech Corporation
 
In  our opinion, the  accompanying balance sheets and  the related statements of
operations, of changes in shareholders' equity and of cash flows present fairly,
in all material respects,  the financial position  of Cholestech Corporation  at
March  31, 1995 and  March 29, 1996, and  the results of  its operations and its
cash flows for each of  the three years in the  period ended March 29, 1996,  in
conformity  with  generally  accepted  accounting  principles.  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  of these  statements in  accordance  with
generally accepted auditing standards which require that we plan and perform the
audit  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,
assessing the  accounting  principles used  and  significant estimates  made  by
management,  and  evaluating the  overall  financial statement  presentation. We
believe that our  audits provide a  reasonable basis for  the opinion  expressed
above.
 
PRICE WATERHOUSE LLP
 
San Jose, California
April 24, 1996, except as to Note 11,
which is as of May 9, 1996
 
                                      F-2
<PAGE>
                             CHOLESTECH CORPORATION
                                 BALANCE SHEETS
 
                                     ASSETS
 
<TABLE>
<CAPTION>
                                                                                    MARCH 31, 1995  MARCH 29, 1996
                                                                                    --------------  --------------
<S>                                                                                 <C>             <C>
Current assets:
  Cash and cash equivalents.......................................................  $    1,230,000  $      361,000
  Marketable securities...........................................................       4,000,000              --
  Restricted marketable securities................................................              --       3,750,000
  Accounts receivable.............................................................         664,000       1,107,000
  Inventories.....................................................................       1,351,000       1,910,000
  Prepaid expenses and other assets...............................................         168,000         167,000
                                                                                    --------------  --------------
    Total current assets..........................................................       7,413,000       7,295,000
Property and equipment, net.......................................................       2,182,000       2,041,000
Other assets, net.................................................................         446,000         309,000
                                                                                    --------------  --------------
                                                                                    $   10,041,000  $    9,645,000
                                                                                    --------------  --------------
                                                                                    --------------  --------------
 
                                       LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
  Short-term bank borrowings......................................................  $           --  $      250,000
  Accounts payable and accrued expenses...........................................         893,000       1,614,000
  Accrued payroll and benefits....................................................         304,000         253,000
  Product warranty................................................................         150,000         187,000
  Current portion of long-term debt...............................................              --         499,000
  Other liabilities...............................................................         137,000          50,000
                                                                                    --------------  --------------
    Total current liabilities.....................................................       1,484,000       2,853,000
Long-term debt, less current portion..............................................              --         799,000
Other liabilities.................................................................          44,000          11,000
                                                                                    --------------  --------------
    Total liabilities.............................................................       1,528,000       3,663,000
                                                                                    --------------  --------------
Commitments (Notes 5 and 6).......................................................
Shareholders' equity:
  Preferred Stock, no par value; 5,000,000 shares authorized;
   no shares issued and outstanding...............................................              --              --
  Common Stock, no par value; 25,000,000 shares authorized;
   7,999,962 and 8,131,824 shares issued and outstanding..........................      55,465,000      55,644,000
  Note receivable from issuance of Common Stock...................................         (36,000)             --
  Accumulated deficit.............................................................     (46,916,000)    (49,662,000)
                                                                                    --------------  --------------
    Total shareholders' equity....................................................       8,513,000       5,982,000
                                                                                    --------------  --------------
                                                                                    $   10,041,000  $    9,645,000
                                                                                    --------------  --------------
                                                                                    --------------  --------------
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-3
<PAGE>
                             CHOLESTECH CORPORATION
                            STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                                         YEAR ENDED    YEAR ENDED    YEAR ENDED
                                                                         MARCH 25,     MARCH 31,     MARCH 29,
                                                                            1994          1995          1996
                                                                        ------------  ------------  ------------
<S>                                                                     <C>           <C>           <C>
Revenues:
  Domestic............................................................  $  1,844,000  $  3,221,000  $  5,548,000
  International.......................................................     1,185,000       817,000     1,325,000
                                                                        ------------  ------------  ------------
                                                                           3,029,000     4,038,000     6,873,000
Cost of products sold.................................................     4,972,000     3,933,000     4,505,000
                                                                        ------------  ------------  ------------
Gross profit (loss)...................................................    (1,943,000)      105,000     2,368,000
                                                                        ------------  ------------  ------------
Operating expenses:
  Research and development............................................     2,134,000       715,000       714,000
  Sales and marketing.................................................     2,909,000     2,694,000     3,168,000
  General and administrative..........................................     2,288,000     1,983,000     1,376,000
                                                                        ------------  ------------  ------------
    Total operating expenses..........................................     7,331,000     5,392,000     5,258,000
                                                                        ------------  ------------  ------------
Loss from operations..................................................    (9,274,000)   (5,287,000)   (2,890,000)
Interest income.......................................................       447,000       278,000       284,000
Interest expense......................................................       (83,000)      (35,000)     (140,000)
                                                                        ------------  ------------  ------------
Net loss..............................................................  $ (8,910,000) $ (5,044,000) $ (2,746,000)
                                                                        ------------  ------------  ------------
                                                                        ------------  ------------  ------------
Net loss per share....................................................  $      (1.14) $       (.63) $       (.34)
                                                                        ------------  ------------  ------------
                                                                        ------------  ------------  ------------
Weighted average common shares........................................     7,790,684     7,954,284     8,041,531
                                                                        ------------  ------------  ------------
                                                                        ------------  ------------  ------------
</TABLE>
 
                 See accompanying notes to financial statements
 
                                      F-4
<PAGE>
                             CHOLESTECH CORPORATION
                  STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY
 
<TABLE>
<CAPTION>
                                   PREFERRED STOCK          COMMON STOCK
                                ----------------------  ---------------------     NOTE      ACCUMULATED
                                 SHARES      AMOUNT      SHARES      AMOUNT    RECEIVABLE     DEFICIT       TOTAL
                                ---------  -----------  ---------  ----------  -----------  ------------  ----------
<S>                             <C>        <C>          <C>        <C>         <C>          <C>           <C>
Balance at March 26, 1993.....         --   $      --   7,648,471  $54,991,000  $ (36,000)  ($32,962,000) $21,993,000
Issuance of Common Stock......                            262,141     226,000                                226,000
Compensation expense relating
 to stock options.............                                        104,000                                104,000
Net loss......................                                                               (8,910,000)  (8,910,000)
                                ---------  -----------  ---------  ----------  -----------  ------------  ----------
Balance at March 25, 1994.....         --          --   7,910,612  55,321,000     (36,000)  (41,872,000)  13,413,000
Issuance of Common Stock......                             89,350      72,000                                 72,000
Compensation expense relating
 to stock options.............                                         72,000                                 72,000
Net loss......................                                                               (5,044,000)  (5,044,000)
                                ---------  -----------  ---------  ----------  -----------  ------------  ----------
Balance at March 31, 1995.....         --          --   7,999,962  55,465,000     (36,000)  (46,916,000)   8,513,000
Issuance of Common Stock......                            131,862     140,000                                140,000
Compensation expense relating
 to stock options.............                                         39,000                                 39,000
Foregiveness of loan..........                                                     36,000                     36,000
Net loss......................                                                               (2,746,000)  (2,746,000)
                                ---------  -----------  ---------  ----------  -----------  ------------  ----------
Balance at March 29, 1996.....         --   $      --   8,131,824  $55,644,000  $      --   ($49,662,000) $5,982,000
                                ---------  -----------  ---------  ----------  -----------  ------------  ----------
                                ---------  -----------  ---------  ----------  -----------  ------------  ----------
</TABLE>
 
                 See accompanying notes to financial statements
 
                                      F-5
<PAGE>
                             CHOLESTECH CORPORATION
                            STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                         YEAR ENDED    YEAR ENDED    YEAR ENDED
                                                                         MARCH 25,     MARCH 31,     MARCH 29,
                                                                            1994          1995          1996
                                                                        ------------  ------------  ------------
<S>                                                                     <C>           <C>           <C>
Cash flows from operating activities:
  Net loss............................................................  $ (8,910,000) $ (5,044,000) $ (2,746,000)
  Adjustments to reconcile net loss to net cash used in operating
   activities:
    Depreciation and amortization.....................................     1,098,000       729,000       612,000
    Deferred revenue..................................................      (215,000)      (74,000)      (30,000)
    Compensation expense relating to stock options issued below
     market...........................................................       104,000        72,000        39,000
    Forgiveness of note receivable....................................            --            --        36,000
    Write-off of property and equipment...............................       231,000         2,000         3,000
    Changes in assets and liabilities:
      Accounts receivable.............................................       357,000      (283,000)     (443,000)
      Inventories.....................................................       (31,000)      103,000      (559,000)
      Prepaid expenses and other assets...............................       331,000         2,000         1,000
      Other assets....................................................       153,000        (8,000)       (6,000)
      Accounts payable and accrued expenses...........................      (218,000)     (115,000)      721,000
      Accrued license fee.............................................      (290,000)           --            --
      Accrued payroll and benefits....................................       429,000      (391,000)      (51,000)
      Product warranty................................................      (110,000)           --        37,000
      Other liabilities...............................................      (100,000)           --            --
                                                                        ------------  ------------  ------------
    Net cash used in operating activities.............................    (7,171,000)   (5,007,000)   (2,386,000)
                                                                        ------------  ------------  ------------
Cash flows from investing activities:
  Sales (proceeds) of marketable securities, net......................       436,000     5,630,000       250,000
  Purchases of property and equipment.................................      (657,000)     (625,000)     (331,000)
                                                                        ------------  ------------  ------------
    Net cash provided by (used in) investing activities...............      (221,000)    5,005,000       (81,000)
                                                                        ------------  ------------  ------------
Cash flows from financing activities:
  Proceeds from long-term debt........................................            --            --     1,500,000
  Principal payments on long-term debt................................            --            --      (202,000)
  Proceeds from short-term bank borrowing.............................            --            --       250,000
  Principal payments on capital leases................................      (685,000)     (268,000)      (90,000)
  Restricted cash investment..........................................       380,000            --            --
  Issuance of Common Stock............................................       226,000        72,000       140,000
                                                                        ------------  ------------  ------------
    Net cash (used in) provided by financing activities...............       (79,000)     (196,000)    1,598,000
                                                                        ------------  ------------  ------------
Net change in cash and cash equivalents...............................    (7,471,000)     (198,000)      869,000
Cash and cash equivalents at beginning of period......................     8,899,000     1,428,000     1,230,000
                                                                        ------------  ------------  ------------
Cash and cash equivalents at end of period............................  $  1,428,000  $  1,230,000  $    361,000
                                                                        ------------  ------------  ------------
                                                                        ------------  ------------  ------------
Supplemental disclosures of cash flow information:
  Cash paid during the year for interest..............................  $     83,000  $     35,000  $    140,000
                                                                        ------------  ------------  ------------
                                                                        ------------  ------------  ------------
Supplemental disclosures of non-cash financing and investing
 activities:
  Capital lease obligations incurred for acquisition of property and
   equipment..........................................................  $     53,000  $    105,000  $         --
                                                                        ------------  ------------  ------------
                                                                        ------------  ------------  ------------
  Reclassification of $3,750,000 in marketable securities to
   restricted marketable securities in connection with a line of
   credit.
</TABLE>
 
                See accompanying notes to financial statements.
 
                                      F-6
<PAGE>
                             CHOLESTECH CORPORATION
                         NOTES TO FINANCIAL STATEMENTS
 
1.  OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
OPERATIONS
 
    Cholestech  Corporation (the "Company") was incorporated February 2, 1988 to
develop, manufacture and  sell point-of-care systems  which can perform  various
diagnostic tests using a single drop of whole blood.
 
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
FISCAL YEAR END
 
    The  Company's fiscal year is a 52-53  week period ending on the last Friday
in March. Fiscal  1994, 1995  and 1996  comprised 52,  53 and  52 week  periods,
respectively.
 
REVENUE RECOGNITION
 
    All  revenues from  product sales  are recognized  at the  time products are
shipped and are denominated in U.S. dollars. The Company also provides an amount
for estimated sales returns.
 
CASH AND CASH EQUIVALENTS AND MARKETABLE SECURITIES
 
    The Company considers all highly liquid investments with a maturity of three
months or less at the date of purchase to be cash equivalents; investments  with
maturities  between  three  and  twelve  months  are  classified  as  short-term
marketable securities and investments with maturities which exceed twelve months
are classified as long-term marketable  securities. The Company has  established
policies  which limit  the type,  credit quality and  length of  maturity of the
securities in  which  it invests.  The  Company's investment  policy  allows  no
investments   in  any  single  private  issuer  to  exceed  $1,000,000  and  the
investments must have, at a minimum, a credit rating of AA. Cash equivalents and
restricted marketable  securities  at  March 29,  1996  consist  principally  of
investments  in money-market funds, commercial  paper and U.S. government-agency
obligations and  are classified  as available  for sale.  Restricted  marketable
securities  are carried at amortized cost, which approximates market. Unrealized
gains and losses are immaterial.
 
CONCENTRATION OF CREDIT RISK
 
    Financial instruments which potentially expose the Company to concentrations
of credit risk include trade accounts receivable; however, this risk is  limited
due  to the  large number of  individually smaller customers.  Collateral is not
required on these  transactions. The  Company maintains  reserves for  potential
credit  losses and such  losses, in the aggregate,  have not exceeded management
expectations.
 
INVENTORIES
 
    Inventories are stated at the lower of cost or market, cost being determined
using the first-in,  first-out (FIFO)  method. Cost  includes direct  materials,
direct labor and manufacturing overhead.
 
PROPERTY AND EQUIPMENT
 
    Property  and equipment are  stated at cost.  Depreciation is computed using
the straight-line method over the estimated  useful lives of the related  assets
which  range from two  to five years. Leasehold  improvements are amortized over
their estimated useful lives, not to exceed  the term of the related lease.  The
cost  of additions and improvements is capitalized while maintenance and repairs
are charged to expense as incurred.
 
WARRANTIES
 
    The Company's  products  are generally  under  warranty against  defects  in
material  and workmanship  for a  period of  one year.  The Company  accrues for
estimated future warranty costs at the time of sale.
 
                                      F-7
<PAGE>
                             CHOLESTECH CORPORATION
                         NOTES TO FINANCIAL STATEMENTS
 
1.  OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
INCOME TAXES
 
    The Company uses  the asset and  liability method of  accounting for  income
taxes, which requires the recognition of deferred tax liabilities and assets for
the  expected  future  tax  consequences of  temporary  differences  between the
financial reporting and income tax bases of assets and liabilities.
 
NET LOSS PER SHARE
 
    Net loss per  share is computed  by dividing  the net loss  by the  weighted
average  number of common  and common equivalent  shares outstanding during each
period. Common equivalent shares are included in determining net loss per share,
to the extent they are dilutive, using the treasury stock method.
 
FAIR VALUE OF FINANCIAL INSTRUMENTS
 
    The carrying  value  of cash  equivalents,  short-term bank  borrowings  and
current  portion  of long-term  debt  approximate fair  value  due to  the short
maturity of those instruments.
 
    The fair  value of  the  Company's long-term  debt, which  approximates  its
carrying  value, is estimated based on the  quoted market prices for the same or
similar issues  or on  the current  rates offered  to the  Company for  debt  of
similar maturities.
 
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.
 
IMPACT OF ADOPTION OF NEW ACCOUNTING STANDARDS
 
    In  March 1995, the Financial Accounting Standards Board issued Statement of
Financial Accounting  Standards  No.  121  "Accounting  for  the  Impairment  of
Long-Lived Assets and for Long-Lived Assets to Be Disposed Of" ("FAS 121") which
requires  the Company  to review  for impairment  of long-lived  assets, certain
identifiable intangibles and goodwill related to those assets whenever events or
changes in circumstances indicate that the carrying amount of an asset might not
be recoverable. In certain situations,  an impairment loss would be  recognized.
The  Company will  adopt FAS 121  during fiscal  1997 and, based  on its initial
evaluation, does  not expect  its adoption  to  have a  material impact  on  the
Company's financial condition or results of operations.
 
    In  October 1995, the Financial  Accounting Standards Board issued Statement
of  Financial  Accounting   Standards  No.  123   "Accounting  for   Stock-Based
Compensation"  ("FAS  123")  which  established a  fair  value  based  method of
accounting  for   stock-based  compensation   plans  and   requires   additional
disclosures  for  those companies  who  elect not  to  adopt the  new  method of
accounting. The  Company will  adopt FAS  123 during  fiscal 1997.  The  Company
intends  to continue to  account for employee stock  options using the intrinsic
value method prescribed by APB Opinion No. 25 and to adopt the "disclosure only"
pro forma alternative described in FAS 123.
 
                                      F-8
<PAGE>
                             CHOLESTECH CORPORATION
                         NOTES TO FINANCIAL STATEMENTS
 
2.  BALANCE SHEET COMPOSITION
    Accounts receivable consist of:
 
<TABLE>
<CAPTION>
                                                               MARCH 31, 1995  MARCH 29, 1996
                                                               --------------  --------------
<S>                                                            <C>             <C>
Accounts receivable..........................................   $    689,000    $ $1,189,000
Less allowance for doubtful accounts and sales returns.......        (25,000)        (82,000)
                                                               --------------  --------------
                                                                $    664,000    $  1,107,000
                                                               --------------  --------------
                                                               --------------  --------------
</TABLE>
 
    Inventories consist of:
 
<TABLE>
<CAPTION>
                                                               MARCH 31, 1995  MARCH 29, 1996
                                                               --------------  --------------
<S>                                                            <C>             <C>
Raw materials................................................   $    854,000    $    875,000
Work-in-process..............................................        167,000         380,000
Finished goods...............................................        330,000         655,000
                                                               --------------  --------------
                                                                $  1,351,000    $  1,910,000
                                                               --------------  --------------
                                                               --------------  --------------
</TABLE>
 
    Property and equipment consist of:
 
<TABLE>
<CAPTION>
                                                               MARCH 31, 1995  MARCH 29, 1996
                                                               --------------  --------------
<S>                                                            <C>             <C>
Machinery and equipment......................................   $  4,137,000    $  4,322,000
Furniture and fixtures.......................................        276,000         280,000
Computer equipment...........................................        833,000         866,000
Leasehold improvements.......................................        203,000         215,000
Construction-in-progress.....................................         41,000         131,000
                                                               --------------  --------------
                                                                   5,490,000       5,814,000
Less accumulated depreciation and amortization...............     (3,308,000)     (3,773,000)
                                                               --------------  --------------
                                                                $  2,182,000    $  2,041,000
                                                               --------------  --------------
                                                               --------------  --------------
</TABLE>
 
Property and equipment  include assets  under capital leases  of $1,116,000  and
$841,000  and accumulated depreciation  of $1,011,000 and  $802,000 at March 31,
1995 and March 29, 1996, respectively.
 
3.  SHORT-TERM BANK BORROWING
    In December 1993, the Company entered into an agreement with a bank for a $3
million revolving line of credit. While the agreement is in effect, the  Company
is  required  to maintain  on  deposit with  the  bank $3,750,000  of marketable
securities as pledged collateral, restricted as to use when the Company has  any
outstanding  borrowings  under  the agreement.  The  Company has  the  option of
selecting an interest rate on borrowings under the agreement based on the bank's
reference rate,  LIBOR or  the  bank's short-term  certificate-of-deposit  rates
(ranging  from 5.5% to 8.25%). The Company is not required to pay any commitment
fees on the unused available credit. The agreement expires on October 31,  1996.
As of March 29, 1996, there was $250,000 outstanding under the agreement.
 
                                      F-9
<PAGE>
                             CHOLESTECH CORPORATION
                         NOTES TO FINANCIAL STATEMENTS
 
4.  LONG-TERM DEBT
    Long-term debt consists of:
 
<TABLE>
<CAPTION>
                                                                                   MARCH 29,
                                                                                      1996
                                                                                  ------------
<S>                                                                               <C>
Note payable, bearing interest at 16%, with monthly installments of $53,000, and
 secured by fixed assets, inventory and a portion of accounts receivable........  $  1,298,000
Less current portion............................................................      (499,000)
                                                                                  ------------
Long-term portion...............................................................  $    799,000
                                                                                  ------------
                                                                                  ------------
</TABLE>
 
    The  note  contains various  provisions  including requirements  to maintain
$3,000,000  or  more  in  cash,  cash  equivalents  and  restricted   marketable
securities,  net  of  all  non-subordinated  debt  outstanding,  and  maintain a
security deposit in the amount of $150,000 payable to the lender in the event of
a default  on  the  note.  If  the  Company's  cash  and  restricted  marketable
securities  were  to fall  below $3,000,000,  the Company  would be  required to
deposit with the lender an additional $200,000 as a security deposit.
 
    Annual maturities under the note are as follows:
 
<TABLE>
<CAPTION>
FISCAL YEAR
- --------------------------------------------------------------------------------
<S>                                                                               <C>
1997............................................................................  $    499,000
1998............................................................................       496,000
1999............................................................................       303,000
                                                                                  ------------
    Total.......................................................................  $  1,298,000
                                                                                  ------------
                                                                                  ------------
</TABLE>
 
5.  LEASES
    The Company leases office and  laboratory facilities under a  noncancellable
operating  lease which expires  in 2000. The lease  provides for renewal options
and options for expansion or reduction of the initial rental space. Rent expense
was  $300,000,  $300,000,  and  $195,000   for  fiscal  1994,  1995  and   1996,
respectively.
 
    The  Company also leases equipment and  furniture under capital leases which
contain renewal options and/or options  to purchase the equipment and  furniture
at fair market value.
 
    Future  minimum payments required under capital and noncancellable operating
leases at March 29, 1996 are:
 
<TABLE>
<CAPTION>
                                                              CAPITAL   OPERATING
FISCAL YEAR                                                   LEASES      LEASES      TOTAL
- -----------------------------------------------------------  ---------  ----------  ----------
<S>                                                          <C>        <C>         <C>
1997.......................................................  $  35,000  $  195,000  $  230,000
1998.......................................................      7,000     200,000     207,000
1999.......................................................      5,000     205,000     210,000
2000.......................................................         --     205,000     205,000
                                                             ---------  ----------  ----------
Total minimum lease payments...............................     47,000  $  805,000  $  852,000
                                                                        ----------  ----------
                                                                        ----------  ----------
 
Imputed interest...........................................     (3,000)
                                                             ---------
Present value of net minimum lease payments................     44,000
Current portion of capital lease obligations...............    (33,000)
                                                             ---------
Capital lease obligations, less current portion............  $  11,000
                                                             ---------
                                                             ---------
</TABLE>
 
                                      F-10
<PAGE>
                             CHOLESTECH CORPORATION
                         NOTES TO FINANCIAL STATEMENTS
 
6.  COMMITMENTS
    The Company has obtained rights to use certain technology in the manufacture
of certain of its  products. The related agreements  provide for the Company  to
pay  royalties ranging from 0.6% to 6%  of net sales of the applicable products.
Total royalty expense for fiscal 1994, 1995 and 1996 was $140,000, $132,000  and
$381,000, respectively.
 
7.  SHAREHOLDERS' EQUITY
PREFERRED STOCK
 
    The  Company  is  authorized  to  issue  5,000,000  shares  of  undesignated
Preferred Stock. The Board of Directors has the authority to issue the Preferred
Stock in  one  or  more  series  and to  fix  the  price,  rights,  preferences,
privileges  and restrictions thereof, including dividend rights, dividend rates,
conversion rights,  voting  rights,  terms  of  redemption,  redemption  prices,
liquidation  preferences and the  number of shares constituting  a series or the
designation of such series, without any further vote or action by the  Company's
shareholders.
 
WARRANTS
 
    At  March 29, 1996,  there were warrants  for 39,242 shares  of Common Stock
outstanding at an exercise price  of $3.50 per share,  which expire on July  15,
1999.
 
EMPLOYEE STOCK PURCHASE PLAN
 
    In  April 1992,  the Company adopted  the Employee Stock  Purchase Plan (the
"Plan") which reserved 75,000 shares of Common Stock to be issued in  accordance
with  the Internal Revenue Code under such  terms as approved by the officers of
the Company. In fiscal 1996, 32,177  shares and 18,637 shares were purchased  by
employees  at prices of $1.59 and $2.01 per share, respectively. In August 1995,
the shareholders  approved an  increase in  the number  of shares  reserved  for
issuance under the Plan from 75,000 to 200,000.
 
STOCK INCENTIVE PROGRAM
 
    The  Board  of  Directors  adopted the  1988  Stock  Incentive  Program (the
"Program") which provides that incentive  stock options (ISOs) and  nonqualified
stock  options (NSOs) for shares of Common Stock may be granted to employees and
consultants of the Company. In accordance with the Program, the stated  exercise
price  shall not be  less than 100% and  85% of the fair  market value of Common
Stock on the date of grant for ISOs and NSOs, respectively. The Program provides
that the options shall be exercisable over a period not to exceed five years and
a day and shall vest at a rate of at least 25 percent each year over a four year
period. Vesting may  be accelerated  upon the  occurrence of  certain events  as
described  in  the  stock option  agreement.  In August  1995,  the shareholders
approved an  increase in  the number  of  shares of  Common Stock  reserved  for
issuance under the Program from 1,300,000 to 1,550,000.
 
    As a result of the Company's initial public offering of Common Stock in June
1992,  options issued in November 1991 were determined to have been issued at an
amount less than the fair market value of the Company's Common Stock at the date
the options were granted. The difference  between the option price and the  fair
market  value  of  the  Company's  Common  Stock  was  determined  to  contain a
compensatory  element.  The  compensatory  element  resulted  in  a  charge   to
operations  in  fiscal 1994,  1995 and  1996 of  $104,000, $72,000  and $39,000,
respectively.
 
    In August 1994, the  Company's Board of Directors  approved a plan to  offer
all  current employees and  consultants holding outstanding  options to purchase
Common Stock of the Company  with exercise prices in  excess of $3.50 per  share
the  opportunity to exchange such options for options priced at $3.50 per share.
In exchange  for  the  new  options, the  employees  and  consultants  forfeited
approximately  25 percent of their vesting credit.  At the time of the approval,
the fair market value of the Company's Common Stock was $2.50 per share.
 
                                      F-11
<PAGE>
                             CHOLESTECH CORPORATION
                         NOTES TO FINANCIAL STATEMENTS
 
7.  SHAREHOLDERS' EQUITY (CONTINUED)
    Stock option activity under the Program is as follows:
 
<TABLE>
<CAPTION>
                                                                  OUTSTANDING   EXERCISE PRICE
                                                                    OPTIONS       PER SHARE
                                                                  ------------  --------------
<S>                                                               <C>           <C>
Balance, March 26, 1993.........................................      943,411   $   .20-$15.25
  Granted.......................................................      290,652   $  5.25-$ 7.13
  Exercised.....................................................     (237,234)  $   .20-$ 5.00
  Cancelled.....................................................     (221,526)  $   .20-$13.50
                                                                  ------------
Balance, March 25, 1994.........................................      775,303   $   .20-$15.25
  Granted.......................................................      860,381   $  1.75-$ 3.50
  Exercised.....................................................      (47,161)  $   .20-$ 5.00
  Cancelled.....................................................     (709,495)  $   .20-$15.25
                                                                  ------------
Balance, March 31, 1995.........................................      879,028   $   .20-$10.50
  Granted.......................................................      212,923   $  1.75-$ 6.56
  Exercised.....................................................      (79,885)  $   .20-$ 3.50
  Cancelled.....................................................     (136,383)  $   .20-$ 3.50
                                                                  ------------
Balance, March 29, 1996.........................................      875,683   $   .20-$10.50
                                                                  ------------
                                                                  ------------
</TABLE>
 
    As of  March 29,  1996, options  for  518,244 shares  of Common  Stock  were
exercisable.
 
8.  INCOME TAXES
    Deferred tax assets (liabilities) consist of the following:
 
<TABLE>
<CAPTION>
                                                                  MARCH 31,       MARCH 29,
                                                                     1995            1996
                                                                --------------  --------------
<S>                                                             <C>             <C>
Net deferred tax assets:
  Net operating loss carryforwards............................  $   16,417,000  $   17,611,000
  Research and development tax credit
   carryforwards..............................................       1,881,000       1,963,000
  Capitalized research and development........................         456,000         487,000
  Other.......................................................         300,000        (756,000)
  Valuation allowance for deferred tax assets.................     (19,054,000)    (19,305,000)
                                                                --------------  --------------
                                                                $           --  $           --
                                                                --------------  --------------
                                                                --------------  --------------
</TABLE>
 
    The Company has net operating loss carryforwards available to reduce taxable
income  through 2011 for federal and  state income tax purposes of approximately
$46,044,000  and  $21,035,000,  respectively.  Additionally,  the  Company   has
research  and development credit carryforwards available to reduce taxes payable
through 2011  for  federal  and  state  income  tax  purposes  of  approximately
$1,470,000 and $493,000, respectively.
 
    As  a result of the Series C Preferred Stock offerings in May 1990, there is
an annual limitation of  approximately $1,500,000 for  federal and state  income
tax  purposes  on the  use  of approximately  $8,100,000  and $1,080,000  of net
operating losses,  and of  $390,000 and  $160,000 of  tax credit  carryforwards,
respectively.  Additionally, as a result of  the Company's secondary offering in
December 1992, the Company's net  operating losses and tax credit  carryforwards
incurred  prior  to  December  1992  are  subject  to  an  annual  limitation of
approximately $5,450,000 for federal and state income tax reporting purposes  on
the  use  of  approximately $28,176,000  and  $8,099,000 of  net  operating loss
carryforwards,
 
                                      F-12
<PAGE>
                             CHOLESTECH CORPORATION
                         NOTES TO FINANCIAL STATEMENTS
 
8.  INCOME TAXES (CONTINUED)
respectively, and  of  $1,151,000  and $379,000  of  tax  credit  carryforwards,
respectively.  If the amount of these limitations  are not utilized in any year,
the amount not utilized increases the allowable limit in the subsequent year.
 
9.  RETIREMENT SAVINGS PLAN
    Effective in September 1990, the Company adopted the Cholestech  Corporation
Retirement  Savings Plan  (the "401(k) Plan")  that covers all  employees of the
Company. An eligible employee may elect  to defer, in the form of  contributions
to  the 401(k)  Plan, between 1%  and 15%  of the total  compensation that would
otherwise be paid to the employee, not  to exceed $9,240 per year (adjusted  for
cost-of-living  increases).  Employee  contributions  are  invested  in selected
mutual funds or a money market fund according to the directions of the employee.
The contributions are fully vested and  nonforfeitable at all times. The  401(k)
Plan  provides  for  employer  contributions  as  determined  by  the  Board  of
Directors. The Company has not made any contributions through fiscal 1996.
 
10. SUBSEQUENT EVENTS
    In May 1996, the Company entered  into a development, marketing and  license
agreement (the "Agreement") with Metra Biosystems to develop an immunoassay test
cassette  incorporating Metra Biosystems bone  resporation technology to be used
with the L-D-X  System. Pursuant  to the Agreement,  Metra Biosystems  purchased
39,526  shares of the Company's Common Stock  for an aggregate purchase price of
$250,000 ($6.325 per share) and is obligated to purchase $750,000 of  additional
shares  of  Common Stock  upon  the completion  of  specified milestones  by the
Company.
 
    On May  9,  1996,  the  Company filed  a  Registration  Statement  with  the
Securities  and Exchange  Commission to  register for  sale 3,450,000  shares of
Common Stock,  which  includes  450,000 shares  related  to  the  over-allotment
option.
 
                                      F-13
<PAGE>
[LOGO]                                                     [PICTURE OF CASSETTE]
 
- --------------------------------------------------------------------------------
                CHOLESTECH L'D'X-REGISTERED TRADEMARK- PROCEDURE
 
Step 1: Take a blood sample from a fingerstick.
 
Step 2: Deposit the blood into the sample well of the test cassette.
 
Step 3: Insert the test cassette into the L-D-X Analyzer and press the "RUN"
        button.
 
Step 4: In less than five minutes, the
        L-D-X Analyzer displays the test results.
<PAGE>
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    NO  DEALER,  SALES  REPRESENTATIVE  OR ANY  OTHER  PERSON  IS  AUTHORIZED IN
CONNECTION WITH ANY OFFERING MADE HEREBY TO GIVE ANY INFORMATION OR TO MAKE  ANY
REPRESENTATION  NOT CONTAINED HEREIN, AND IF  GIVEN OR MADE, SUCH INFORMATION OR
REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE  COMPANY
OR  THE UNDERWRITERS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL, OR A
SOLICITATION OF  AN OFFER  TO  BUY, ANY  SECURITIES  OTHER THAN  THE  SECURITIES
OFFERED  HEREBY, NOR DOES IT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN
OFFER TO BUY ANY SUCH SECURITIES TO  ANY PERSON IN ANY JURISDICTION IN WHICH  IT
IS  UNLAWFUL TO MAKE SUCH AN OFFER OR SOLICITATION. NEITHER THE DELIVERY OF THIS
PROSPECTUS NOR ANY SALE MADE HEREUNDER  SHALL UNDER ANY CIRCUMSTANCES CREATE  AN
IMPLICATION  THAT THERE HAS BEEN  NO CHANGE IN THE  AFFAIRS OF THE COMPANY SINCE
THE DATE HEREOF OR THAT  THE INFORMATION CONTAINED HEREIN  IS CORRECT AS OF  ANY
DATE SUBSEQUENT TO THE DATE HEREOF.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                     PAGE
                                                   ---------
<S>                                                <C>
Prospectus Summary...............................          3
Risk Factors.....................................          5
The Company......................................         15
Use of Proceeds..................................         16
Price Range of Common Stock......................         17
Dividend Policy..................................         17
Capitalization...................................         18
Dilution.........................................         19
Selected Financial Data..........................         20
Management's Discussion and Analysis of Financial
  Condition and Results of Operations............         21
Business.........................................         26
Management.......................................         44
Certain Relationships and Related Transactions...         51
Principal Shareholders...........................         52
Description of Capital Stock.....................         53
Underwriting.....................................         55
Legal Matters....................................         56
Experts..........................................         56
Additional Information...........................         56
Index to Financial Statements....................        F-1
</TABLE>
 
                                3,000,000 SHARES
 
                                     [LOGO]
 
                                  COMMON STOCK
 
                              -------------------
 
                                   PROSPECTUS
 
                              -------------------
 
                     Vector Securities International, Inc.
 
                      Principal Financial Securities, Inc.
 
                                           , 1996
 
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