CYBERONICS INC
S-3, 1997-08-15
ELECTROMEDICAL & ELECTROTHERAPEUTIC APPARATUS
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<PAGE>
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 15, 1997.
                                                      REGISTRATION NO. 333-
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- --------------------------------------------------------------------------------
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                           --------------------------
                                    FORM S-3
                             REGISTRATION STATEMENT
 
                                     UNDER
 
                           THE SECURITIES ACT OF 1933
                           --------------------------
                                CYBERONICS, INC.
             (Exact name of Registrant as specified in its charter)
                           --------------------------
 
<TABLE>
<S>                                                    <C>
                      DELAWARE                                           76-0236465
  (State or other jurisdiction of incorporation or          (I.R.S. Employer Identification No.)
                    organization)
</TABLE>
 
                           --------------------------
 
                           17448 HIGHWAY 3, SUITE 100
                           WEBSTER, TEXAS 77598-4135
 
                                 (281) 332-1375
         (Address, including zip code, and telephone number, including
            area code, of Registrant's principal executive offices)
                           --------------------------
 
                               ROBERT P. CUMMINS
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                CYBERONICS, INC.
                           17448 HIGHWAY 3, SUITE 100
                           WEBSTER, TEXAS 77598-4135
                                 (281) 332-1375
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)
                           --------------------------
 
                                   COPIES TO:
 
          KENNETH M. SIEGEL                          JOHN L. DONAHUE
          TAMARA G. MATTISON                         GEORGE A. GUCKER
            JOSHUA A. LIPP                           WILLIAM A. HINES
   WILSON SONSINI GOODRICH & ROSATI           PILLSBURY MADISON & SUTRO LLP
       Professional Corporation                       P.O. Box 7880
          650 Page Mill Road               San Francisco, California 94120-7880
     Palo Alto, California 94304                      (415) 983-1000
            (650) 493-9300
 
                           --------------------------
 
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
   AS SOON AS PRACTICABLE AFTER THE REGISTRATION STATEMENT BECOMES EFFECTIVE.
                           --------------------------
 
    If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. / /
    If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reinvestment plans, check the following box. / /
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. / / _____________
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. / / _____________
 
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. / /
                           --------------------------
 
                        CALCULATION OF REGISTRATION FEE
 
<TABLE>
<CAPTION>
                                                             PROPOSED MAXIMUM    PROPOSED MAXIMUM
        TITLE OF EACH CLASS OF              AMOUNT TO       OFFERING PRICE PER  AGGREGATE OFFERING      AMOUNT OF
    SECURITIES TO BE REGISTERED(1)       BE REGISTERED(2)        UNIT(3)             PRICE(3)        REGISTRATION FEE
<S>                                     <C>                 <C>                 <C>                 <C>
Common Stock, $.01 par value..........      3,450,000            $13.875           $47,868,750           $14,506
</TABLE>
 
(1) This Registration Statement also applies to rights under the Registrant's
    Preferred Shares Rights Agreement which are attached to and tradable only
    with the shares of Common Stock registered hereby. No registration fee is
    required for such rights as they will be issued for no additional
    consideration.
 
(2) Includes 450,000 shares which the Underwriters have the option to purchase
    to cover over-allotments, if any.
 
(3) Estimated solely for the purpose of computing the amount of the registration
    fee pursuant to Rule 457(c) based upon the average of the high and low
    prices of the Company's Common Stock on the Nasdaq National Market on August
    13, 1997.
                           --------------------------
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT OF 1933, AS AMENDED, OR UNTIL THIS REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION,
ACTING PURSUANT TO SAID SECTION 8(A), MAY DETERMINE.
 
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<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>
                  SUBJECT TO COMPLETION, DATED AUGUST 15, 1997
 
                                3,000,000 SHARES
 
                                     [LOGO]
 
                                  COMMON STOCK
 
    ALL OF THE 3,000,000 SHARES OF COMMON STOCK OFFERED HEREBY ARE BEING SOLD BY
CYBERONICS, INC. ("CYBERONICS" OR THE "COMPANY"). THE COMPANY'S COMMON STOCK IS
TRADED ON THE NASDAQ NATIONAL MARKET UNDER THE SYMBOL "CYBX." ON AUGUST 14,
1997, THE LAST REPORTED SALE PRICE OF THE COMMON STOCK ON THE NASDAQ NATIONAL
MARKET WAS $13 3/8 PER SHARE. SEE "PRICE RANGE OF COMMON STOCK."
 
    SEE "RISK FACTORS" BEGINNING ON PAGE 5 FOR A DISCUSSION OF CERTAIN FACTORS
THAT SHOULD BE CONSIDERED BY PROSPECTIVE PURCHASERS OF THE COMMON STOCK OFFERED
HEREBY.
 
                               -----------------
 
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>
- --------------------------------------------------------------------------------
                                       PRICE TO     UNDERWRITING    PROCEEDS TO
                                        PUBLIC       DISCOUNT(1)    COMPANY(2)
<S>                                  <C>            <C>            <C>
- --------------------------------------------------------------------------------
PER SHARE..........................        $              $              $
TOTAL(3)...........................        $              $              $
- --------------------------------------------------------------------------------
</TABLE>
 
(1) SEE "UNDERWRITING" FOR INFORMATION CONCERNING INDEMNIFICATION OF THE
    UNDERWRITERS AND OTHER MATTERS.
 
(2) BEFORE DEDUCTING EXPENSES PAYABLE BY THE COMPANY ESTIMATED AT $450,000.
 
(3) THE COMPANY HAS GRANTED TO THE UNDERWRITERS A 30-DAY OPTION TO PURCHASE UP
    TO AN ADDITIONAL 450,000 SHARES OF COMMON STOCK SOLELY TO COVER
    OVER-ALLOTMENTS, IF ANY. IF THE UNDERWRITERS EXERCISE THIS OPTION IN FULL,
    THE PRICE TO PUBLIC WILL TOTAL $        , THE UNDERWRITING DISCOUNT WILL
    TOTAL $        AND THE PROCEEDS TO COMPANY WILL TOTAL $        . SEE
    "UNDERWRITING."
 
    THE SHARES OF COMMON STOCK ARE OFFERED BY THE SEVERAL UNDERWRITERS NAMED
HEREIN, SUBJECT TO RECEIPT AND ACCEPTANCE BY THEM AND SUBJECT TO THEIR RIGHT TO
REJECT ANY ORDER IN WHOLE OR IN PART. IT IS EXPECTED THAT DELIVERY OF THE
CERTIFICATES REPRESENTING SUCH SHARES WILL BE MADE AGAINST PAYMENT THEREFOR AT
THE OFFICE OF MONTGOMERY SECURITIES ON OR ABOUT            , 1997.
 
                              -------------------
 
MONTGOMERY SECURITIES                                         PIPER JAFFRAY INC.
 
                                          , 1997
<PAGE>
                            INSIDE FRONT COVER PAGE
 
         ILLUSTRATION SHOWING PLACEMENT OF THE NCP SYSTEM IN A PATIENT]
 
CAPTION: Cyberonics manufactures and markets the NeuroCybernetic Prosthesis
         System (the "NCP System"), an implantable medical device for the
         treatment of epilepsy. On July 16, 1997, the Company received approval
         from the FDA to market the NCP System as an adjunctive therapy for
         reducing the frequency of seizures in patients over the age of twelve
         with partial onset seizures that are refractory to antiepileptic drugs.
 
    CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE COMMON STOCK
OFFERED HEREBY. SUCH TRANSACTIONS MAY INCLUDE STABILIZING, THE PURCHASE OF
COMMON STOCK TO COVER SYNDICATE SHORT POSITIONS AND THE IMPOSITION OF PENALTY
BIDS. FOR A DESCRIPTION OF THESE ACTIVITIES, SEE "UNDERWRITING."
 
    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 OF THE COMPANY ON THE NASDAQ NATIONAL
MARKET IN ACCORDANCE WITH RULE 103 UNDER REGULATION M. SEE "UNDERWRITING."
 
                                       2
<PAGE>
                               PROSPECTUS SUMMARY
 
    THE FOLLOWING SUMMARY IS QUALIFIED IN ITS ENTIRETY BY THE MORE DETAILED
INFORMATION AND THE CONSOLIDATED FINANCIAL STATEMENTS AND NOTES THERETO
APPEARING ELSEWHERE IN THIS PROSPECTUS, INCLUDING INFORMATION UNDER "RISK
FACTORS." UNLESS OTHERWISE INDICATED, ALL INFORMATION CONTAINED IN THIS
PROSPECTUS ASSUMES THAT THE UNDERWRITERS' OVER-ALLOTMENT OPTION WILL NOT BE
EXERCISED.
 
                                  THE COMPANY
 
    Cyberonics, Inc. ("Cyberonics" or the "Company") manufactures and markets
the NeuroCybernetic Prosthesis System (the "NCP System"), an implantable medical
device for the treatment of epilepsy. On July 16, 1997, the Company received
approval from the United States Food and Drug Administration ("FDA") to market
the NCP System in the United States as an adjunctive therapy for reducing the
frequency of seizures in patients over twelve years of age with partial onset
seizures that are refractory (resistant) to antiepileptic drugs ("AEDs"). The
Company has also received regulatory approval to sell the NCP System in Canada,
Europe and certain countries in the Far East. The Company has completed a total
of seven clinical studies, including five controlled acute phase studies
involving over 450 patients, a long-term multi-year follow-up study involving
253 patients and a mortality study. To date, over 1,000 patients have
accumulated in excess of 2,000 patient years of treatment experience with the
NCP System.
 
    The Company's NCP System is the only FDA-approved medical device for the
treatment of epilepsy. The NCP System is a pacemaker-like device that delivers
an electrical signal through an implantable lead to the left vagus nerve in the
patient's neck. The left vagus nerve has been shown to have influence over
numerous areas of the brain. The NCP System delivers vagus nerve stimulation
therapy on a chronic, intermittent basis. Stimulation may also be initiated by
the patient with a hand held magnet.
 
    Epilepsy is a disorder of the brain characterized by recurrent seizures. It
is estimated that over 1.8 million individuals are currently being treated for
epilepsy in the United States, with over 117,000 new cases reported annually,
and that over three million individuals suffer from epilepsy in Western Europe
and Japan, with over 210,000 new cases reported each year. In addition, it is
estimated that approximately 50% of patients with epilepsy suffer from partial
onset seizures, and over 20% of these patients suffer from refractory partial
onset seizures.
 
    Traditionally, there have been two courses of treatment available to persons
suffering from epilepsy: drug therapy and surgery. The efficacy of these
treatments depends in part upon the type of seizures from which a patient
suffers. Seizures are classified in two broad categories, generalized and
partial. Generalized seizures involve the entire brain from onset; partial onset
seizures are localized to only one part of the brain. While patients suffering
from generalized seizures are more likely to respond well to available drug
therapies, the efficacy of drugs for patients suffering from partial onset
seizures is highly variable. AEDs serve as a first-line treatment and are
prescribed for virtually all individuals being treated for epilepsy. For those
patients who are refractory to AED therapy, the only other traditionally
available alternative is surgery. Surgery treatment is beneficial for a limited
number of patients due to the difficulty in localizing the source of the
seizure, risks of morbidity and mortality, high costs and the non-reversible
nature of the procedure.
 
    The Company believes that a successful new therapy for patients with
refractory epilepsy should be clinically proven, provide significant seizure
control during acute phase studies, be safe and tolerable with few side effects,
provide long-term benefits and be easy for the physician to prescribe and for
the patient to use. Based on the results of its preclinical studies, mechanism
of action research and seven human clinical trials, the Company believes that
the NCP System meets all of these criteria.
 
    The Company has recently commenced commercial launch of the NCP System in
the United States and overseas. Key elements of the NCP System sales and
marketing strategy are to: (1) develop a direct sales force in the United States
and certain large foreign markets supported by independent third-party
distributors in smaller markets, (2) obtain widespread key opinion leader and
other physician acceptance, (3) educate patients and their families on the
benefits of the NCP System, (4) establish adequate levels of reimbursement by
third-party payors, and (5) conduct research and clinical trials for additional
neurological applications of vagus nerve stimulation.
 
                                       3
<PAGE>
                                  THE OFFERING
 
<TABLE>
<S>                                                       <C>
Common Stock offered by the Company.....................  3,000,000 shares
Common Stock outstanding after the offering.............  16,322,175 shares(1)
Use of proceeds.........................................  Develop sales, marketing and
                                                          distribution capabilities; fund
                                                          clinical trials and product
                                                          development; expand manufacturing
                                                          capabilities; and for general
                                                          corporate purposes.
Nasdaq National Market symbol...........................  CYBX
</TABLE>
 
                      SUMMARY CONSOLIDATED FINANCIAL DATA
 
<TABLE>
<CAPTION>
                                                                           YEAR ENDED JUNE 30,
                                               ---------------------------------------------------------------------------
                                                   1993           1994           1995            1996            1997
                                               -------------  -------------  -------------  --------------  --------------
<S>                                            <C>            <C>            <C>            <C>             <C>
CONSOLIDATED STATEMENT OF OPERATIONS DATA:
Net sales....................................  $     149,775  $     399,689  $     966,989  $    1,416,965  $    1,372,005
Cost of sales................................         50,463        117,835        347,457         411,562         372,180
                                               -------------  -------------  -------------  --------------  --------------
  Gross profit...............................         99,312        281,854        619,532       1,005,403         999,825
Operating expenses:
  Research and development...................      3,390,037      4,323,671      5,678,024       8,024,502       6,549,474
  Selling, general and administrative........      2,154,070      2,519,037      2,906,589       3,420,111       5,933,852
                                               -------------  -------------  -------------  --------------  --------------
    Total operating expenses.................      5,544,107      6,842,708      8,584,613      11,444,613      12,483,326
Interest income, net.........................        326,408        629,993        688,909         423,044         436,813
Other (expense) income, net..................         (3,333)         5,136         37,362         (97,084)       (198,143)
                                               -------------  -------------  -------------  --------------  --------------
Net loss.....................................  $  (5,121,720) $  (5,925,725) $  (7,238,810) $  (10,113,250) $  (11,244,831)
                                               -------------  -------------  -------------  --------------  --------------
                                               -------------  -------------  -------------  --------------  --------------
Net loss per share...........................  $       (0.65) $       (0.66) $       (0.79) $        (1.06) $        (0.93)
                                               -------------  -------------  -------------  --------------  --------------
                                               -------------  -------------  -------------  --------------  --------------
Shares used in computing net loss per
  share......................................      7,882,857      8,945,968      9,218,008       9,513,038      12,030,171
</TABLE>
 
<TABLE>
<CAPTION>
                                                                                            JUNE 30, 1997
                                                                                    ------------------------------
                                                                                        ACTUAL      AS ADJUSTED(2)
                                                                                    --------------  --------------
<S>                                                                                 <C>             <C>
CONSOLIDATED BALANCE SHEET DATA:
Cash, cash equivalents and investment securities..................................  $    8,123,456  $   45,390,956
Working capital...................................................................       7,763,480      45,030,980
Total assets......................................................................      10,249,737      47,517,237
Accumulated deficit...............................................................     (49,167,002)    (49,167,002)
Total stockholders' equity........................................................       8,421,472      45,688,972
</TABLE>
 
- ------------------------
 
(1) Based on shares outstanding as of July 31, 1997. Excludes: (i) 2,956,890
    shares of Common Stock issuable upon the exercise of outstanding employee
    stock options to purchase shares of Common Stock at a weighted average
    exercise price of approximately $4.35 per share; (ii) 1,570 shares of Common
    Stock issuable upon the exercise of outstanding warrants at an exercise
    price of $5.33; and (iii) 358,703 shares of Common Stock available for
    future grants under the Company's stock option plans. See Note 6 of Notes to
    Consolidated Financial Statements.
 
(2) Adjusted to reflect the sale by the Company of the 3,000,000 shares of
    Common Stock offered hereby at an assumed offering price of $13.38 per
    share, after deduction of the estimated underwriting discount and offering
    expenses, and the receipt of the estimated net proceeds therefrom. See "Use
    of Proceeds" and "Capitalization."
 
                                       4
<PAGE>
                                  RISK FACTORS
 
    PROSPECTIVE INVESTORS SHOULD CONSIDER CAREFULLY THE FOLLOWING RISK FACTORS,
IN ADDITION TO THE OTHER INFORMATION CONTAINED IN THIS PROSPECTUS AND
INCORPORATED HEREIN BY REFERENCE CONCERNING THE COMPANY AND ITS BUSINESS, BEFORE
PURCHASING THE SHARES OF COMMON STOCK OFFERED HEREBY. THIS PROSPECTUS CONTAINS
FORWARD-LOOKING STATEMENTS WITHIN THE MEANING OF SECTION 27A OF THE SECURITIES
ACT AND SECTION 21E OF THE EXCHANGE ACT THAT INVOLVE CERTAIN RISKS AND
UNCERTAINTIES. DISCUSSIONS CONTAINING SUCH FORWARD-LOOKING STATEMENTS MAY BE
FOUND IN THE MATERIAL SET FORTH BELOW AND UNDER "MANAGEMENT'S DISCUSSION AND
ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS" AND "BUSINESS," AS
WELL AS IN THE PROSPECTUS GENERALLY. THE COMPANY'S ACTUAL RESULTS COULD DIFFER
MATERIALLY FROM THOSE ANTICIPATED IN SUCH FORWARD-LOOKING STATEMENTS AS A RESULT
OF CERTAIN FACTORS, INCLUDING THOSE SET FORTH IN THE FOLLOWING RISK FACTORS. THE
FORWARD-LOOKING STATEMENTS CONTAINED HEREIN ARE MADE AS OF THE DATE OF THIS
PROSPECTUS AND THE COMPANY ASSUMES NO OBLIGATION TO UPDATE SUCH FORWARD-LOOKING
STATEMENTS OR TO UPDATE THE REASONS WHY ACTUAL RESULTS COULD DIFFER MATERIALLY
FROM THOSE ANTICIPATED IN SUCH FORWARD-LOOKING STATEMENTS.
 
RELIANCE ON SINGLE PRODUCT
 
    The Company has only one product, the NCP System, which has been approved by
the FDA only for a single indication: as an adjunctive therapy in reducing the
frequency of seizures in adults and adolescents over twelve years of age with
partial onset seizures that are refractory to antiepileptic drugs ("AEDs"). The
Company does not expect to have any other product or approved indication for the
NCP System for the foreseeable future. Although the Company has been able to
sell the NCP System in certain countries in Europe since 1994 and recently
received United States FDA approval and Canadian approval, it is only now in the
process of initiating full-scale marketing and sales efforts in the United
States and other countries. The Company's inability to commercialize
successfully the NCP System would have a material adverse effect on the
Company's business, financial condition and results of operations.
 
UNCERTAINTY OF MARKET ACCEPTANCE
 
    Although the NCP System was approved for commercial sale in a number of
European countries beginning in 1994, the Company has sold, through June 30,
1997, a limited number of NCP Systems. Market acceptance of the Company's NCP
System will depend on the Company's ability to convince the medical community of
the clinical efficacy and safety of vagus nerve stimulation and the NCP System,
and on the approval and availability of adequate levels of reimbursement. While
the NCP System has been used in approximately 1,000 patients through June 30,
1997, it provides a new form of therapy with which many physicians are
unfamiliar. The Company believes that existing AEDs and surgery are the only
other approved and currently available therapies competitive with the NCP System
in the treatment of epileptic seizures. Such therapies may be more attractive to
patients or their physicians than the NCP System in terms of efficacy, cost or
reimbursement availability. There can be no assurance that the NCP System will
achieve market acceptance for the treatment of epilepsy or for any other
indication or that adequate levels of reimbursement from governmental or
third-party payors will be available. Failure of the NCP System to gain market
acceptance would have a material adverse effect on the Company's business,
financial condition and results of operations.
 
HISTORY OF LOSSES; PROFITABILITY UNCERTAIN; FLUCTUATIONS IN QUARTERLY OPERATING
  RESULTS
 
    The Company has incurred net losses and accumulated a deficit of
approximately $49.2 million through June 30, 1997. In July 1997, the Company
received FDA marketing approval which permits the Company to sell the NCP System
in the United States for use as an adjunctive therapy in reducing the frequency
of refractory partial onset seizures in patients over twelve years of age. In
addition, the Company has obtained "CE Marking," the designation of market
approval now accepted by all European Union member countries, for its NCP System
which, when combined with approvals from Canada and certain other countries,
permits the Company to sell the NCP System internationally. Even with these
marketing approvals, there can be no assurance that the Company will be able to
generate adequate sales to achieve
 
                                       5
<PAGE>
profitability in the future. In addition, in order to develop these markets, the
Company will incur substantial marketing and sales expenses. The amount and
timing of anticipated expenditures will depend on numerous factors, including
the nature and timing of marketing and sales activities, the expansion of the
Company's manufacturing capabilities, the nature and timing of additional
clinical trials, and the Company's product development efforts.
 
    The Company's results of operations may fluctuate significantly from quarter
to quarter and will depend upon numerous factors, many of which are outside the
Company's control. Such factors include, but are not limited to, the extent to
which the Company's NCP System gains market acceptance, timing of any approvals
for reimbursement by third-party payors, the rate and size of expenditures
occurred as the Company expands its sales and marketing efforts and availability
of key components, materials and contract services which may be dependent on the
Company's ability to forecast sales. See "Management's Discussion and Analysis
of Financial Condition and Results of Operations."
 
LIMITATIONS ON THIRD-PARTY REIMBURSEMENT
 
    The Company's ability to commercialize the NCP System successfully will
depend in part on whether third-party payors, including private healthcare
insurers, managed care plans, the United States government's Medicare and
Medicaid programs, and others, agree both to cover the NCP System, and the
procedures and services associated with the NCP System, and to reimburse
adequately for the costs of the NCP System and the related services.
 
    In deciding to cover a new therapy, third-party payors base their initial
coverage decisions on several factors, including, but not limited to, the status
of the FDA's review of the product, the product's safety and efficacy, the
number of studies performed and peer-reviewed articles published with respect to
the product, and how the product and therapy compares to alternative therapies.
There can be no assurance that third-party payors will view the Company and the
NCP System favorably with respect to any of the above factors, which may impede
the Company's obtaining favorable coverage decisions on a timely basis, or at
all. The Company has only limited experience in seeking and obtaining coverage
decisions from third-party payors. A failure to achieve favorable coverage
decisions for the NCP System in a timely manner could deter patients and their
physicians from using the NCP System and could have a material adverse effect on
the Company's business, financial condition or results of operations.
 
    Once a favorable coverage determination is made with respect to a product,
payors must determine the level of reimbursement for the product and related
therapy and procedures. The Company believes that coverage and reimbursement for
most epilepsy patients who may be implanted with the NCP System will need to be
obtained from third-party private payors. In making decisions about
reimbursement amounts, third-party private payors typically reimburse for the
costs of newly covered devices and services using the standard methods they
employ for other products and services already covered. Many private insurers
and managed care plans use a variety of payment mechanisms, including, but not
limited to, discounted charges, per diem amounts, resource-based payment scales
and reimbursed costs. The Company believes that a significant number of epilepsy
patients in the United States are either eligible for benefits under the
Medicare program or are uninsured. The Medicare program uses a fixed-payment
method (based on Diagnosis Related Groups or "DRGs") to pay for hospital
inpatient services and uses a resource-based relative value scale to pay for
physicians' services. Under current DRG groupings, hospital inpatient procedures
for implanting the NCP System are assigned to one of two different DRGs based on
whether or not the patient has complications or comorbidities (coexisting severe
medical problems). The DRG grouping that would include implantation of the NCP
System for patients without complications or comorbidities pay hospitals less
than the costs of purchasing and implanting the NCP System. The Company believes
that this DRG grouping would apply to most of the epilepsy patients covered by
Medicare. In order to assure adequate reimbursement for all epileptic patients
eligible for benefits under Medicare, the Company intends to seek changes in the
DRG grouping so that NCP System implant cases would be reclassified to other,
higher-paying DRGs. The Company has only limited experience in seeking and
obtaining coverage and payment approvals from third-party payors, and there can
be no assurance that
 
                                       6
<PAGE>
the Company would be successful in achieving coverage or adequate reimbursement
levels, or any, or that it can obtain new DRG assignments under the Medicare
program to cover the complete costs of therapy using the NCP System. If the
Company is unsuccessful in achieving coverage or adequate reimbursement levels
or in obtaining new DRG assignments, or if hospitals or physicians view their
payments as inadequate, then patients, physicians and hospitals could be
deterred from using the NCP System, which could have a material adverse effect
on the Company's business, financial condition or results of operations. See
"Business--Third-Party Reimbursement."
 
LIMITED MARKETING AND SALES EXPERIENCE
 
    Although the Company has had approval to market the NCP System in the member
countries of the European Union since 1994, it has only recently received FDA
approval to commercialize the NCP System in the United States and, consequently,
it has limited experience in marketing, direct sales and distribution. The
Company has recently established a marketing and sales force for the United
States market, but no assurance can be given that the Company's direct marketing
and sales force will succeed in promoting the NCP System to patients, health
care providers or third-party payors. The Company believes that, to market its
products directly, it must employ a marketing and sales force with technical
expertise. In addition, due to the limited market awareness of the NCP System,
the Company believes that the sales process could be lengthy, requiring the
Company to educate patients, health care providers and third-party payors
regarding the clinical benefits of the NCP System. In addition, in certain
international territories, the Company relies, and intends to continue relying,
upon independent distributors. There can be no assurance that the Company will
be able to recruit and retain skilled marketing and sales personnel or foreign
distributors, or that the Company's marketing efforts will be successful.
Failure by the Company to market successfully the NCP System would have a
material adverse effect on the Company's business, financial condition and
results of operations. See "Business--Marketing and Sales."
 
LIMITED MANUFACTURING EXPERIENCE
 
    The Company has a limited history of operations that, to date, has consisted
primarily of manufacturing limited quantities of the NCP System for clinical
investigations and for commercial sales activities in international markets. The
Company does not have experience manufacturing the NCP System in the volumes
that will be necessary to achieve significant commercial sales. The Company is
currently negotiating a lease for a new facility, and intends to move all of its
manufacturing operations to the new facility, which is expected to begin
production in early calendar 1998. The Company may encounter difficulties in
scaling up production of the NCP System, in procuring the necessary supply of
materials, components and contract services, or in hiring and training
additional manufacturing personnel to support domestic and international demand.
The Company will be required to obtain FDA approval for this change in the
manufacturing facility. The new manufacturing facility will also have to be
inspected for compliance with the FDA's Quality System regulations ("QSR") and
ISO 9001 and 9002 standards, which impose certain procedural and documentation
requirements with respect to device design, development, manufacturing and
quality assurance activities, before the Company can begin commercial-scale
production of the NCP System at the new manufacturing facility. In addition, one
of the Company's contract manufacturers has moved its manufacturing operations
to a new facility. The Company will be required to obtain FDA approval for the
change in the location of the contractor's manufacturing facility, which
generally requires a preapproval inspection by the FDA to determine the
contractor's compliance with the QSR. There can be no assurance that the Company
will be able to obtain the necessary FDA and other approvals for its or its
contract manufacturers' new facilities on a timely basis, or at all. If the
Company is unable to achieve commercial-scale production capability on a timely
basis with acceptable quality and manufacturing yield and costs, to sustain such
capacity, or to achieve FDA and other governmental approvals, the ability of the
Company to deliver products on a timely basis could be impaired which could have
a material adverse effect on the Company's business, financial condition or
results of operations. See "Business--Manufacturing and Sources of Supply."
 
                                       7
<PAGE>
DEPENDENCE ON KEY SUPPLIERS AND MANUFACTURERS
 
    The Company relies upon sole source suppliers for certain of the key
components, materials and contract services used in manufacturing the NCP
System. The Company periodically experiences discontinuation or unavailability
of components, materials and contract services which may require qualification
of alternative sources or, if no such alternative sources are identified,
product design changes. The Company believes that pursuing and qualifying
alternative sources and/or redesigning specific components of the NCP System,
when necessary, could consume significant Company resources. In addition, such
changes generally require regulatory submissions and approvals. Any extended
delays in or inability to secure alternative sources for these or other
components, materials and contract services could result in product supply and
manufacturing interruptions. These delays could have a material adverse effect
on the Company's ability to manufacture the NCP System on a timely and cost
competitive basis, and therefore on its business, financial condition or results
of operations. See "Business--Manufacturing and Sources of Supply."
 
RISK OF PRODUCT RECALL
 
    The NCP System includes a complex electronic device and lead designed to be
implanted in the human body. Component failures, manufacturing errors or design
defects could result in an unsafe condition in patients. The occurrence of such
problems or other adverse reactions could result in a recall of the Company's
products, possibly requiring removal (and potentially reimplantation) of NCP
Generators and/or leads. In 1991, a failure of an NCP System caused permanent
paralysis of one patient's left vocal cord. In addition, several patients
experienced vagus nerve lead failures which, although not harmful to the
patient, reduced the efficacy of the treatment and required replacement. Since
the occurrence of these failures, changes have been made to the Company's
product designs and no similar failures have been reported to the Company. There
can be no assurance, however, that the Company will not experience similar or
other product problems or that the Company will not be required to recall
products. Any product recall could have a material adverse effect on the
Company's business, financial condition or results of operations. See
"Business--Clinical Trials" and "--Government Regulation."
 
DEPENDENCE ON PATENTS, LICENSES AND PROPRIETARY RIGHTS
 
    The Company's success will depend in part on its ability to obtain and
maintain patent and other intellectual property protection for the NCP System
and its improvements, and for vagus nerve stimulation therapy. To that end, the
Company has acquired licenses under certain patents and intends to seek patents
on its own inventions used in its products and treatment methods. The process of
seeking patent protection can be expensive and time consuming and there can be
no assurance that patents will issue from the currently pending or future
applications or that, if patents are issued, they will be of sufficient scope or
strength to provide meaningful protection of the Company's technology, or any
commercial advantage to the Company.
 
    Cyberonics believes that the licenses held by the Company provide it with
protection in the United States in the field of cranial nerve stimulation,
including vagus nerve stimulation for the control of epilepsy, movement
disorders, including Parkinson's disease and essential tremor, and additional
indications for which method patents have been issued. The protection offered by
the licensed international patents is not as strong as that offered by the
licensed United States patents due to differences in patent laws. In particular,
the European Patent Convention prohibits patents covering methods for treatment
of the human body by surgery or therapy. In addition, there has been substantial
litigation regarding patent and other intellectual property rights in the
medical device industry. Litigation, which could result in substantial cost to
and diversion of effort by the Company, may be necessary to enforce patents
issued or licensed to the Company, to protect trade secrets or know-how owned by
the Company or to defend the Company against claimed infringement of the rights
of others and to determine the scope and validity of the proprietary rights of
others. Adverse determinations in litigation could subject the Company to
 
                                       8
<PAGE>
significant liabilities to third parties, could require the Company to seek
licenses from third parties and could prevent the Company from manufacturing,
selling or using the NCP System, any of which could have a material adverse
effect on the Company's business, financial condition or results of operations.
There can be no assurance that any required license would be available on
acceptable terms, if at all. See "Business-- Patents, Licenses and Proprietary
Rights."
 
COMPETITION; RAPID TECHNOLOGICAL CHANGE
 
    The Company believes that existing and future AEDs will be the primary
competition for its NCP System. The Company may also face competition from other
medical device companies for the treatment of partial seizures. Medtronic, Inc.
has clinically assessed an implantable signal generator used with an invasive
deep brain probe (thalamic stimulation) for the treatment of neurological
disorders and has received FDA approval for the device for the treatment of
essential tremor, including that associated with Parkinson's disease. The
Company could also face competition from other large medical device companies
which have the technology, experience and capital resources to develop
alternative devices for the treatment of epilepsy. Many of the Company's
competitors have substantially greater financial, manufacturing, marketing and
technical resources than the Company and have obtained third-party reimbursement
approvals. In addition, the health care industry is characterized by extensive
research efforts and rapid technological progress. There can be no assurance
that the Company's competitors will not develop technologies and obtain
regulatory approval for products that are more effective in treating epilepsy
than the Company's current or future products. There can also be no assurance
that advancements in surgical techniques will not make surgery a more attractive
therapy for epilepsy. The development by others of new treatment methods with
novel AEDs, medical devices or surgical techniques for epilepsy could render the
NCP System non-competitive or obsolete. There can be no assurance that the
Company will be able to compete successfully against current and future
competitors or that competition, including the development and commercialization
of new products and technology, will not have a material adverse effect on the
Company's business, financial condition or results of operations. See
"Business--Competition."
 
MANAGEMENT OF GROWTH
 
    In connection with the commercialization of the NCP System in the United
States, the Company has begun and intends to continue to significantly expand
the scope of its operations, in particular in manufacturing, marketing and
sales. Such activities have placed, and may continue to place, a significant
strain on the Company's resources and operations. The Company's ability to
effectively manage such growth will depend upon its ability to attract, hire and
retain highly qualified employees and management personnel. The Company competes
for such personnel with other companies, academic institutions, government
entities and other organizations. There can be no assurance that the Company
will be successful in hiring or retaining qualified personnel. The Company's
success will also depend on the ability of its officers and key employees to
continue to implement and improve its operational, management information and
financial control systems, of which there can be no assurance. The Company's
inability to manage growth effectively could have a material adverse effect on
the Company's business, financial condition or results of operations. See
"Business--Employees."
 
PRODUCT LIABILITY AND AVAILABILITY OF INSURANCE
 
    The manufacture and sale of the NCP System entails the risk of product
liability claims. Although the Company maintains product liability insurance,
there can be no assurance that the coverage limits of the Company's insurance
policies will be adequate. Such insurance is expensive and in the future may not
be available on acceptable terms, if at all. A successful claim brought against
the Company in excess of its insurance coverage could have a material adverse
effect on the Company's business, financial condition or results of operations.
See "Business--Product Liability and Insurance."
 
                                       9
<PAGE>
GOVERNMENT REGULATION
 
    The preclinical and clinical testing, manufacturing, labeling, sale,
distribution and promotion of the NCP System are subject to extensive and
rigorous regulation in the United States by federal agencies, primarily the FDA,
and by comparable state agencies. The NCP System is regulated as a medical
device by the FDA and is subject to the FDA's premarket approval ("PMA")
requirements. In July 1997, the Company received FDA approval to market the NCP
System in the United States for use as an adjunctive therapy in reducing the
frequency of seizures in adults and adolescents over twelve years of age with
partial onset seizures that are refractory to AEDs. Nonetheless, in the future,
it will be necessary for the Company to file PMA supplements, and apply for
additional regulatory approvals, possibly including new investigational device
exemptions ("IDEs") and additional PMAs, for other applications of the NCP
System and for modified or future-generation products. Commercial distribution
in certain foreign countries is also subject to obtaining regulatory approvals
from the appropriate authorities in such countries. The process of obtaining FDA
and other required regulatory approvals is lengthy, expensive and uncertain.
Moreover, regulatory approvals may include regulatory restrictions on the
indicated uses for which a product may be marketed. Failure to comply with
applicable regulatory requirements can result in, among other things, fines,
suspension or withdrawal of approvals, confiscations or recalls of products,
operating restrictions and criminal prosecution. Furthermore, changes in
existing regulations or adoption of new regulations could prevent the Company
from obtaining, or affect the timing of, future regulatory approvals. There can
be no assurance that the Company will be able to obtain additional future
regulatory approvals on a timely basis or at all. Delays in receipt of or
failure to receive such future approvals, suspension or withdrawal of previously
received approvals, or recalls of the NCP System could have a material adverse
effect on the Company's business, financial condition or results of operations.
See "Business--Government Regulation."
 
FUTURE CAPITAL REQUIREMENTS
 
    Although the Company believes that its current resources, together with the
estimated net proceeds of this offering, will be sufficient to meet its capital
requirements at least through June 30, 1999, there can be no assurance that the
Company will not require additional financing either before or after that date.
This estimate is based on certain assumptions, which may not hold true, and
there can be no assurance that the proceeds of this offering, together with its
available cash, cash equivalents, investment securities and investment income,
will be sufficient to meet the Company's capital requirements at least through
June 30, 1999. The Company's future capital requirements will depend upon
numerous factors, including the extent and timing of future product sales, the
scale-up of the Company's manufacturing facilities, and the nature, timing and
success of clinical trials for additional indications for the NCP System. Such
financing, if required, may not be available on satisfactory terms, or at all.
Lack of access to sufficient financing would impair the Company's ability to
fully pursue its business objectives, which could have a material adverse effect
on the Company's business, financial condition or results of operations. See
"Management's Discussion and Analysis of Financial Condition and Results of
Operations."
 
RISKS ASSOCIATED WITH INTERNATIONAL OPERATIONS
 
    Although the NCP System has been approved for commercialization in the
European Union countries since 1994, the Company has not generated significant
revenues from such countries to date. The Company currently is expanding its
marketing and sales activities in international markets. There can be no
assurance that the Company will successfully increase international sales or
that the Company will be successful in obtaining reimbursement or any regulatory
approvals required in foreign countries. Changes in overseas economic
conditions, currency exchange rates, foreign tax laws, or tariffs or other trade
regulations could have a material adverse effect on the Company's business,
financial condition or results of operations. The anticipated international
nature of the Company's business is also expected to subject the Company and its
representatives, agents and distributors to laws and regulations of the foreign
 
                                       10
<PAGE>
jurisdictions in which they operate or where the NCP System is sold. The
regulation of medical devices in a number of such jurisdictions, particularly in
the European Union, continues to develop and there can be no assurance that new
laws or regulations will not have an adverse effect on the Company's business,
financial condition or results of operations. In addition, the laws of certain
foreign countries do not protect the Company's intellectual property rights to
the same extent as do the laws of the United States. In particular, the European
Patent Convention prohibits patents covering methods for the treatment of the
human body by surgery or therapy. See "Business--Patents and Proprietary Rights"
and "--Government Regulation."
 
VOLATILITY OF STOCK PRICE
 
    The stock market has from time to time experienced significant price and
volume fluctuations that are unrelated to the operating performance of
particular companies. Like the stock prices of other medical device companies,
the market price of the Company's Common Stock has in the past been, and may in
the future be, subject to significant volatility. Factors such as reports on the
clinical efficacy and safety of the NCP System, product and component supply
issues, government approval status, fluctuations in the Company's operating
results, announcements of technical innovations or new products by the Company
or its competitors, changes in estimates of the Company's performance by
securities analysts, failure to meet securities analysts' expectations,
developments with respect to patents or proprietary rights, public concern as to
the safety of products developed by the Company or others may have a significant
effect on the market price of the Common Stock. In addition, the price of the
Company's stock could be affected by stock price volatility in the medical
device industry or the capital markets in general without regard to the
Company's operating performance. See "Price Range of Common Stock."
 
SHARES ELIGIBLE FOR FUTURE SALE
 
    Sales of substantial amounts of Common Stock in the public market following
the offering made hereby could have an adverse effect on the price of the
Company's Common Stock. The number of shares of Common Stock available for sale
in the public market is limited by restrictions under the Securities Act and by
the following lock-up agreements: (i) St. Jude Medical, Inc. ("St. Jude")
executed an agreement (the "St. Jude Lock-Up Agreement") with the Company
pursuant to which St. Jude agreed not to sell or otherwise dispose of any of its
shares of Common Stock on or before March 31, 1998 and (ii) in connection with
this offering, the Company's officers, directors and certain employees executed
agreements (the "Offering Lock-Up Agreements"), pursuant to which such officers,
directors and employees agreed not to sell or otherwise dispose of any of their
shares for 90 days following the date of this Prospectus without the prior
written consent of Montgomery Securities. Montgomery Securities may, however, in
its sole discretion at any time and without notice, release all or any portion
of the securities subject to Offering Lock-Up Agreements. Upon completion of
this offering, the Company will have outstanding 16,322,175 shares of Common
Stock. Of these shares: 11,616,695 shares (including the 3,000,000 shares sold
in this offering) will be available for immediate sale (except to the extent
held by affiliates of the Company); 2,181,818 shares will become eligible for
sale on April 1, 1998 upon expiration of the St. Jude Lock-Up Agreement; 989,288
shares will become eligible for sale 90 days from the date hereof upon
expiration of the Offering Lock-Up Agreements and the 1,534,374 shares will
become eligible for sale pursuant to Rule 144 under the Securities Act of 1933,
as amended (the "Securities Act"), on March 28, 1998. In addition, as of July
31, 1997, the Company had outstanding warrants to purchase an aggregate of 1,570
shares of Common Stock. Also, as of July 31, 1997, options to purchase 2,956,890
shares of Common Stock were outstanding under the Company's stock option plans.
Furthermore, as of July 31, 1997, holders of 4,652,192 shares of Common Stock
are entitled to certain demand and piggy-back rights with respect to the
registration of such shares under the Securities Act.
 
                                       11
<PAGE>
POTENTIAL EFFECT OF ANTI-TAKEOVER PROVISIONS
 
    Certain provisions of the Company's Certificate of Incorporation, Preferred
Shares Rights Agreement, Delaware law, and the indemnification agreements of
certain officers and directors of the Company may be deemed to have an
anti-takeover effect. Such provisions may delay, defer, prevent or render more
difficult or costly a tender offer or takeover attempt that a stockholder might
consider to be in that stockholder's best interests, including attempts that
might result in a premium over the market price for the shares held by
stockholders.
 
    The Company's Board of Directors may issue additional shares of Common Stock
or establish one or more classes or series of Preferred Stock, having
designations, relative voting rights, dividend rates, liquidation and other
rights, preferences and limitations that the Board of Directors fixes without
stockholder approval. In addition, in March 1997, the Board of Directors
declared a dividend distribution pursuant to the Company's Preferred Shares
Rights Agreement of one preferred share purchase right for each outstanding
share of Common Stock.
 
    The Company is also subject to the anti-takeover provisions of Section 203
of the Delaware General Corporation Law. In general, the statute prohibits a
publicly-held Delaware corporation from engaging in a "business combination"
with an "interested stockholder" for a period of three years after the date of
the transaction in which the person became an interested stockholder, unless the
business combination is approved in a prescribed manner.
 
    In connection with its investment in the Company, St. Jude entered into a
Stockholders' Agreement which provides, among other things, that through July 1,
1998, it will vote its shares of Common Stock in favor of director nominees as
recommended by the Board of Directors and, for so long as it holds any Common
Stock, to vote its shares of Common Stock on all other matters submitted to the
stockholders for a vote as recommended by the Board of Directors or in the same
proportion as the votes cast by all other stockholders. Such voting arrangements
could have the effect of delaying or preventing a takeover of the Company.
 
                                       12
<PAGE>
                                USE OF PROCEEDS
 
    The net proceeds to the Company from the sale of the 3,000,000 shares of
Common Stock offered hereby, based on an assumed public offering price of $13.38
per share, after the deduction of the estimated underwriting discount and
offering expenses, are estimated to be $37.3 million ($42.9 million if the
Underwriters' over-allotment option is exercised in full).
 
    The Company intends to use the net proceeds from this offering as follows:
approximately $10.0 million to develop sales, marketing and distribution
capabilities; approximately $8.0 million to fund further product development and
clinical trials; approximately $3.2 million to expand manufacturing
capabilities; and the remainder for working capital and general corporate
purposes. The amounts actually expended for these purposes will depend on
numerous factors. In addition, the Company may use a portion of the net proceeds
from this offering for the investment in or acquisition of complementary
businesses, products or technologies. The Company does not currently have any
agreements regarding such potential investments or acquisitions, nor is it in
negotiations regarding any such potential investments or acquisitions. Pending
such uses, the net proceeds of this offering will be invested in short-term,
investment-grade, income-producing investments. The Company believes that its
current resources, together with the estimated net proceeds of this offering,
will be sufficient to meet its capital requirements at least through June 30,
1999. See "Management's Discussion and Analysis of Financial Condition and
Results of Operations."
 
                          PRICE RANGE OF COMMON STOCK
 
    The Company's Common Stock is quoted on the Nasdaq National Market under the
symbol "CYBX." The following table sets forth, for the fiscal periods indicated,
the range of high and low sale prices per share of the Common Stock as reported
by the Nasdaq National Market.
 
<TABLE>
<CAPTION>
                                                                                                    HIGH        LOW
                                                                                                  ---------  ---------
<S>                                                                                               <C>        <C>
FISCAL YEAR ENDED JUNE 30, 1996
  First Quarter.................................................................................  $    6.00  $    4.00
  Second Quarter................................................................................       8.00       4.50
  Third Quarter.................................................................................       6.25       4.00
  Fourth Quarter................................................................................       7.50       4.25
FISCAL YEAR ENDED JUNE 30, 1997
  First Quarter.................................................................................  $    6.56  $    5.75
  Second Quarter................................................................................       6.69       2.63
  Third Quarter.................................................................................       5.13       3.25
  Fourth Quarter................................................................................       9.38       4.63
FISCAL YEAR ENDED JUNE 30, 1998
  First Quarter (through August 14, 1997).......................................................  $   15.00  $    6.50
</TABLE>
 
    As of July 31, 1997, there were 155 stockholders of record. On August 14,
1997, the last reported sale price of the Common Stock on the Nasdaq National
Market was $13.38 per share.
 
                                  THE COMPANY
 
    The Company was incorporated in Delaware in December 1987. "Cyberonics" and
the "Company" refer to Cyberonics, Inc. and its subsidiary. The Company's
executive offices are located at 17448 Highway 3, Suite 100, Webster, Texas
77598-4135, and its telephone number is (281) 332-1375.
 
    "Cyberonics," the Cyberonics logo and "NCP" are registered trademarks of the
Company. All other brand names or trademarks appearing in this Prospectus are
the property of their respective holders.
 
                                       13
<PAGE>
                                DIVIDEND POLICY
 
    The Company currently intends to retain future earnings to fund the
development and growth of its business and, therefore, does not anticipate
paying cash dividends for the foreseeable future. Any future payment of
dividends will be determined by the Company's Board of Directors and will depend
on the Company's financial condition, results of operations and other factors
deemed relevant by its Board of Directors.
 
                                 CAPITALIZATION
 
    The following table sets forth the capitalization of the Company as of June
30, 1997 and such capitalization as adjusted to reflect the sale of 3,000,000
shares of Common Stock offered hereby, at an assumed public offering price of
$13.38 per share (after deducting the estimated underwriting discount and
offering expenses).
 
<TABLE>
<CAPTION>
                                                                                            JUNE 30, 1997
                                                                                    ------------------------------
                                                                                        ACTUAL       AS ADJUSTED
                                                                                    --------------  --------------
<S>                                                                                 <C>             <C>
Stockholders' equity:
  Preferred stock, $.01 par value; 2,500,000 shares authorized, none issued and
    outstanding...................................................................  $     --        $     --
  Common stock, $.01 par value; 25,000,000 shares authorized; actual: 13,322,175
    shares issued and outstanding; as adjusted:
    16,322,175 shares issued and outstanding(1)...................................         133,222         163,222
  Additional paid-in capital......................................................      57,338,856      94,576,356
  Deferred compensation...........................................................         (63,750)        (63,750)
  Accumulated deficit.............................................................     (49,167,002)    (49,167,002)
  Cumulative translation adjustment...............................................         180,146         180,146
                                                                                    --------------  --------------
        Total stockholders' equity................................................  $    8,421,472  $   45,688,972
                                                                                    --------------  --------------
                                                                                    --------------  --------------
</TABLE>
 
- ------------------------
 
(1) Excludes as of July 31, 1997: (i) 2,956,890 shares of Common Stock issuable
    upon the exercise of outstanding employee stock options to purchase shares
    of Common Stock at a weighted average exercise price of approximately $4.35
    per share; (ii) 1,570 shares of Common Stock issuable upon exercise of
    outstanding warrants at an exercise price of $5.33 per share; and (iii)
    358,703 shares of Common Stock available for future grants under the
    Company's stock option plans. See Note 6 of Notes to Consolidated Financial
    Statements.
 
                                       14
<PAGE>
                                    DILUTION
 
    The net tangible book value of the Company as of June 30, 1997 was $8.4
million, or $0.63 per share of Common Stock. Net tangible book value per share
represents the amount of the Company's net tangible assets (tangible assets of
the Company less total liabilities), divided by the number of shares of Common
Stock outstanding as of such date.
 
    Net tangible book value dilution per share represents the difference between
the amount per share paid by purchasers of the 3,000,000 shares of Common Stock
in the offering made hereunder and the pro forma net tangible book value per
share of Common Stock immediately after this offering. After giving effect to
the sale by the Company of the 3,000,000 shares of Common Stock offered hereby
at an assumed offering price of $13.38 per share, the pro forma net tangible
book value of the Company as of June 30, 1997 would have been approximately
$45.7 million, or $2.80 per share (after deduction of the estimated underwriting
discount and offering expenses payable by the Company). This represents an
immediate increase in pro forma net tangible book value of $2.17 per share to
existing stockholders and an immediate dilution in pro forma net tangible book
value of $10.58 per share to purchasers of Common Stock in this offering.
 
<TABLE>
<S>                                                           <C>        <C>
Assumed offering price per share............................             $   13.38
  Net tangible book value per share before offering.........  $    0.63
  Increase per share attributable to new investors..........       2.17
                                                              ---------
Pro forma net tangible book value per share after
 offering...................................................                  2.80
                                                                         ---------
Net tangible book value dilution per share to new
 investors..................................................             $   10.58
                                                                         ---------
                                                                         ---------
</TABLE>
 
    The above calculation excludes as of July 31, 1997: (i) 2,956,890 shares of
Common Stock issuable upon the exercise of outstanding employee stock options to
purchase shares of Common Stock at a weighted average exercise price of
approximately $4.35 per share; (ii) 1,570 shares of Common Stock issuable upon
exercise of outstanding warrants at an exercise price of $5.33 per share; and
(iii) 358,703 shares of Common Stock available for future grants under the
Company's stock option plans. To the extent that any of these options are
exercised, there will be further dilution to new investors. See "Capitalization"
and Note 6 of Notes to Consolidated Financial Statements.
 
                                       15
<PAGE>
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
    The following table summarizes certain selected financial data and is
qualified by reference to and should be read in conjunction with the Company's
Consolidated Financial Statements and with "Management's Discussion and Analysis
of Financial Condition and Results of Operations" included elsewhere herein. The
selected consolidated financial data as of June 30, 1996 and 1997, and for each
of the years in the three-year period ended June 30, 1997 are derived from
consolidated financial statements that have been audited by Arthur Andersen LLP,
independent public accountants, which are included elsewhere herein. The
selected consolidated financial data as of June 30, 1993, 1994 and 1995 and for
the years ended June 30, 1993 and 1994 are derived from audited financial
statements not included herein.
<TABLE>
<CAPTION>
                                                                        YEAR ENDED JUNE 30,
                                           ------------------------------------------------------------------------------
                                                1993            1994            1995            1996            1997
                                           --------------  --------------  --------------  --------------  --------------
<S>                                        <C>             <C>             <C>             <C>             <C>
CONSOLIDATED STATEMENT OF OPERATIONS
  DATA:
Net sales................................  $      149,775  $      399,689  $      966,989  $    1,416,965  $    1,372,005
Cost of sales............................          50,463         117,835         347,457         411,562         372,180
                                           --------------  --------------  --------------  --------------  --------------
Gross profit.............................          99,312         281,854         619,532       1,005,403         999,825
Operating expenses:
  Research and development...............       3,390,037       4,323,671       5,678,024       8,024,502       6,549,474
  Selling, general and administrative....       2,154,070       2,519,037       2,906,589       3,420,111       5,933,852
                                           --------------  --------------  --------------  --------------  --------------
    Total operating expenses.............       5,544,107       6,842,708       8,584,613      11,444,613      12,483,326
Interest income, net.....................         326,408         629,993         688,909         423,044         436,813
Other (expense) income, net..............          (3,333)          5,136          37,362         (97,084)       (198,143)
                                           --------------  --------------  --------------  --------------  --------------
Net loss.................................  $   (5,121,720) $   (5,925,725) $   (7,238,810) $  (10,113,250) $  (11,244,831)
                                           --------------  --------------  --------------  --------------  --------------
                                           --------------  --------------  --------------  --------------  --------------
Net loss per share.......................  $        (0.65) $        (0.66) $        (0.79) $        (1.06) $        (0.93)
                                           --------------  --------------  --------------  --------------  --------------
                                           --------------  --------------  --------------  --------------  --------------
Shares used in computing net loss per
  share..................................       7,882,857       8,945,968       9,218,008       9,513,038      12,030,171
 
<CAPTION>
 
                                                                              JUNE 30,
                                           ------------------------------------------------------------------------------
                                                1993            1994            1995            1996            1997
                                           --------------  --------------  --------------  --------------  --------------
<S>                                        <C>             <C>             <C>             <C>             <C>
CONSOLIDATED BALANCE SHEET DATA:
Cash, cash equivalents and investment
  securities.............................  $   24,385,755  $   18,468,154  $   11,852,619  $    2,201,962  $    8,123,456
Working capital..........................      20,489,855       9,676,289       8,988,373       1,042,396       7,763,480
Total assets.............................      25,195,514      19,756,148      13,560,593       3,948,043      10,249,737
Accumulated deficit......................     (14,644,386)    (20,570,111)    (27,808,921)    (37,922,171)    (49,167,002)
Total stockholders' equity...............      24,134,127      18,503,398      11,443,555       1,465,050       8,421,472
</TABLE>
 
                                       16
<PAGE>
               MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                      CONDITION AND RESULTS OF OPERATIONS
 
    THIS PROSPECTUS CONTAINS FORWARD-LOOKING STATEMENTS WITHIN THE MEANING OF
SECTION 27A OF THE SECURITIES ACT AND SECTION 21E OF THE EXCHANGE ACT THAT
INVOLVE CERTAIN RISKS AND UNCERTAINTIES. DISCUSSIONS CONTAINING SUCH
FORWARD-LOOKING STATEMENTS MAY BE FOUND IN THE MATERIAL SET FORTH BELOW AND
UNDER "RISK FACTORS," AND "BUSINESS," AS WELL AS IN THE PROSPECTUS GENERALLY,
INCLUDING THE DOCUMENTS INCORPORATED BY REFERENCE HEREIN. THE COMPANY'S ACTUAL
RESULTS COULD DIFFER MATERIALLY FROM THOSE ANTICIPATED IN SUCH FORWARD-LOOKING
STATEMENTS AS A RESULT OF CERTAIN FACTORS, INCLUDING THOSE SET FORTH UNDER "RISK
FACTORS" APPEARING ELSEWHERE IN THIS PROSPECTUS AND IN THE DOCUMENTS
INCORPORATED BY REFERENCE HEREIN. THESE FORWARD-LOOKING STATEMENTS ARE MADE AS
OF THE DATE OF THIS PROSPECTUS AND THE COMPANY ASSUMES NO OBLIGATION TO UPDATE
SUCH FORWARD-LOOKING STATEMENTS OR TO UPDATE THE REASONS WHY ACTUAL RESULTS
COULD DIFFER MATERIALLY FROM THOSE ANTICIPATED IN SUCH FORWARD-LOOKING
STATEMENTS.
 
SUMMARY
 
    Cyberonics was founded in 1987 to design, develop and bring to market
medical devices which provide a novel therapy, vagus nerve stimulation, for the
treatment of epilepsy and other debilitating neurological disorders. Clinical
trials of the NCP System began with the first patient implant in November 1988
under an IDE from the FDA. The Company received FDA approval to market the NCP
System in the United States in July 1997 for use as an adjunctive therapy in
reducing the frequency of seizures in adults and adolescents over twelve years
of age with partial onset seizures that are refractory to AEDs. From inception
through July 1997, the Company's primary focus was on obtaining FDA approval for
the NCP System. The Company has had minimal revenues to date, primarily
consisting of sales to clinical investigators and international sales, and has
been unprofitable since inception. Since inception, the Company has incurred
substantial expenses, primarily for research and development activities
(including product and process development and clinical trials and related
regulatory activities), sales and marketing activities and manufacturing
start-up. For the period from inception through June 30, 1997, the Company
incurred a cumulative net deficit of approximately $49.2 million.
 
    Cyberonics was granted regulatory approval in 1994 to market and sell the
NCP System in the member countries of the European Union and also has permission
to sell in certain other international markets. However, through fiscal 1996,
the Company devoted only limited resources to marketing and sales activities
internationally, and only in early fiscal 1997 began initiating significant
marketing and sales activities. International sales of the NCP System have been
limited to date.
 
    Cyberonics is engaged in obtaining reimbursement approvals from the various
health care provider systems in the United States and in key international
markets, and has received reimbursement approvals from certain payment
authorities in a limited number of international markets. The Company does not
expect to achieve significant sales unless and until additional reimbursement
approvals are obtained for the NCP System.
 
    The Company expects to incur substantial costs related to sales and
marketing activities associated with United States and international market
entry, expansion of manufacturing capabilities, clinical trials and regulatory
activities and product and process development. It is expected that there will
be a significant delay between the increased levels of spending and any
resulting increase in revenues. Accordingly, the Company expects to remain
unprofitable through at least the fiscal year ending June 30, 1999. There can be
no assurance that the Company will become profitable after that time or, that if
it becomes profitable, it will remain so in future periods. Furthermore, the
Company's results of operations may fluctuate significantly from quarter to
quarter and will depend upon numerous factors, many of which are outside the
Company's control. Such factors include, but are not limited to, the extent to
which the Company's NCP System gains market acceptance, any approvals for
reimbursement by third-party payors, the rate and size of expenditures incurred
as the Company expands its sales and marketing efforts,
 
                                       17
<PAGE>
availability of key components, materials and contract services which may be
dependent on the Company's ability to forecast sales and ability to achieve
acceptable manufacturing yields and costs.
 
RESULTS OF OPERATIONS
 
    NET SALES.  Net sales for the fiscal year ended June 30, 1997 totaled $1.4
million compared to $1.4 million and $967,000 for the years ended June 30, 1996
and 1995, respectively. The substantial majority of sales in each period
presented were derived from international markets where the Company had
regulatory approval to sell the NCP System. Through fiscal 1997, domestic sales
have depended entirely upon the Company's conducting clinical trial activities
under arrangements with certain investigational centers, some of which receive
research funding from the Company. Domestic sales made in connection with such
clinical studies have been limited to date and, in certain cases, have been made
pursuant to risk-sharing provisions. Sales made under risk-sharing arrangements
are deferred until Cyberonics receives payment from the centers and the centers
in turn receive third-party reimbursement or satisfy other terms set forth in
their respective arrangements. International sales were $1.3 million, $1.3
million and $763,000 in fiscal 1997, 1996 and 1995, respectively, while domestic
sales, net of risk sharing provisions, were $24,000, $110,000 and $204,000 in
such periods. In July 1997, the Company received FDA approval to market the NCP
System in the United States. Although the Company may utilize risk-sharing
arrangements in connection with clinical trials for additional indications for
the NCP System, the Company expects that such revenues will not represent a
material component of its net sales in any future period. While the Company
currently has regulatory approval to sell the NCP System in the United States
and in a number of significant key international markets, significant increases
in sales will be dependent upon achieving market acceptance for the NCP System
and upon obtaining reimbursement approval in key markets.
 
    GROSS PROFIT.  Cost of sales consist primarily of direct labor, allocated
manufacturing overhead and the acquisition cost of raw materials and components.
In addition, the Company is obligated to pay royalties ranging from 7% to 7.75%
on the first $12 million in cumulative net sales, and from 4% to 4.75%
thereafter. Expenses related to royalty obligations under the Company's license
agreements totaled $46,000 during each of the years ended June 30, 1997, 1996
and 1995, and will continue at or above this level in future years. The Company
will include substantially all royalties in cost of sales in future periods.
 
    The Company's gross margin percentage was 72.9% for the year ended June 30,
1997 compared to 71.0% and 64.1% for fiscal 1996 and 1995, respectively. The
fiscal 1997 increase is attributable primarily to a shift in international sales
mix toward markets where the Company sells its products directly, resulting in
higher average selling prices and consequently, higher gross margins. Gross
margin percentages can be expected to fluctuate in future periods based upon the
mix between direct and distributor sales, the NCP System's selling price and the
levels of production volume.
 
    RESEARCH AND DEVELOPMENT EXPENSES.  Research and development expenses are
comprised of both expenses related to the Company's product and process
development efforts and expenses associated with conducting clinical trials and
certain related regulatory activities. Research and development expenses totaled
$6.5 million, $8.0 million and $5.7 million during the years ended June 30,
1997, 1996 and 1995, respectively. The Company's research and development
spending decreased during fiscal 1997 as the Company completed its confirmatory
clinical trial. The increased level of research and development expenditures in
1996 over 1995 was due primarily to the costs associated with the Company's
confirmatory clinical trial which was at its peak level of activity during
fiscal 1996. The Company intends to conduct clinical trials of the NCP System
for additional indications both within and outside the field of epilepsy.
Accordingly, the Company expects research and development expenses to fluctuate
in future periods depending primarily upon the level of clinical trial activity.
 
    SELLING, GENERAL AND ADMINISTRATIVE EXPENSES.  Selling, general and
administrative expenses totaled $5.9 million, $3.4 million and $2.9 million
during the years ended June 30, 1997, 1996 and 1995,
 
                                       18
<PAGE>
respectively. The continued increases from year to year were primarily due to
expanded international market development activities and, during the second half
of fiscal 1997, preparations for United States product launch. The Company began
expanding its sales and marketing staff in late calendar 1996 and early 1997 to
more actively pursue international sales and in anticipation of FDA approval in
the United States and expects to add further sales and marketing personnel
during fiscal 1998. The Company also expects to add administrative personnel in
anticipation of higher levels of business activity. Accordingly, the Company
expects its sales, general and administrative expenses to increase substantially
in absolute amount over the fiscal 1997 level.
 
    INTEREST INCOME, NET.  Net interest income totaled $437,000, $423,000 and
$689,000 during the years ended June 30, 1997, 1996 and 1995, respectively.
Interest income increased in fiscal 1997 over fiscal 1996 as a result of higher
average cash and investment balances during fiscal 1997 due to investment of the
proceeds from private placements of Common Stock completed during fiscal 1997.
The decrease in interest income in 1996 compared to 1995 resulted from lower
average cash and investment balances available for investment during 1996.
 
    OTHER (EXPENSE) INCOME, NET.  Other income (expense) totaled $(198,000),
$(97,000) and $37,000 during the three years ended June 30, 1997, 1996 and 1995,
respectively. For each of these years, other income (expense) consisted of net
gains and losses resulting from foreign currency fluctuations.
 
    INCOME TAXES.  At June 30, 1997, the Company had net operating loss
carryforwards for federal income tax purposes of approximately $42.2 million
which expire during the years 2003 through 2012, and tax credit carryforwards of
approximately $1.3 million for federal income tax purposes which expire during
the years 2006 through 2012. Due to its net operating loss history, to date the
Company has established a valuation allowance to fully offset its deferred tax
assets, including those related to its carryforwards, resulting in no income tax
benefit for financial reporting purposes. Current federal income tax regulations
with respect to changes in ownership could limit the utilization of the
Company's net operating loss carryforwards.
 
LIQUIDITY AND CAPITAL RESOURCES
 
    From inception through February 1993, the Company financed its operations
primarily through private placements of its securities through which it raised
approximately $16.5 million in net proceeds. In February 1993, the Company
completed an initial public offering of 2,000,000 shares of its Common Stock,
generating net proceeds to the Company of approximately $22 million. In July
1996, the Company raised an additional $11.2 million in net proceeds in a sale
of 2,181,818 shares of its Common Stock to St. Jude and, in March 1997, the
Company raised an additional approximately $6.8 million in a sale of 1,534,374
shares of its Common Stock in a private placement. Additionally, through June
30, 1997, the Company has funded approximately $530,000 of its equipment needs
with proceeds from an equipment lease agreement. The Company had no short-or
long-term borrowings outstanding at June 30, 1997, and had no credit facilities
available at that time.
 
    The Company expects to incur substantial additional costs related to sales
and marketing activities associated with United States and international market
entry, expansion of manufacturing capabilities, clinical trials and regulatory
activities and product and process development. The amount and timing of
anticipated expenditures will depend upon numerous factors both within and
outside of the Company's control, including the nature and timing of marketing
and sales activities and the nature and timing of additional clinical trials for
additional indications, both within and outside the field of epilepsy. Moreover,
the Company's ability to generate income from operations will be dependent upon
obtaining reimbursement approval from government and third-party payors as well
as receiving market acceptance for the NCP System.
 
                                       19
<PAGE>
    During fiscal 1997, the Company used approximately $12.0 million in cash in
operating activities. During the fiscal year, inventories increased to $1.0
million from $672,000 at June 30, 1996 as the Company built inventory levels in
anticipation of higher levels of manufacturing and sales activities. During
fiscal 1997, the Company raised approximately $18.0 million from the sale of
Common Stock in two private placement transactions, one of which (approximately
$11.2 million) was completed in July 1996 and the other (approximately $6.8
million) was completed in March 1997.
 
    The Company's liquidity will continue to be reduced as amounts are expended
for expansion of sales and marketing activities, manufacturing expansion,
continuing clinical trials and related regulatory affairs, and product and
process development. Although the Company has no firm commitments, the Company
expects to make capital expenditures of approximately $1.6 million during the
remainder of fiscal 1998 and approximately $3.0 million in fiscal 1999,
primarily to expand manufacturing capabilities and to enhance general
infrastructure and facilities.
 
    The Company believes that the proceeds from this offering combined with its
current resources will be sufficient to fund its operations at least through
June 30, 1999. This estimate is based on certain assumptions, which may not hold
true, and there can be no assurance that the proceeds of this offering, together
with its available cash, cash equivalents, investment securities and investment
income, will be sufficient to meet the Company's capital requirements at least
through June 30, 1999. The availability of financing either before or after that
time will depend upon a number of important factors, including the state of the
United States capital markets and economy in general and the health care and
medical device segments in particular, the status of the Company's international
and domestic sales activities and the status of the Company's clinical and
regulatory activities. There can be no assurance that the Company will be able
to raise additional capital when needed or that the terms upon which capital
will be available will be favorable to the Company.
 
IMPACT OF NEW ACCOUNTING PRONOUNCEMENTS
 
    See Note 1 of Notes to Consolidated Financial Statements for a discussion of
the impact of new accounting pronouncements.
 
                                       20
<PAGE>
                                    BUSINESS
 
    THIS PROSPECTUS CONTAINS FORWARD-LOOKING STATEMENTS WITHIN THE MEANING OF
SECTION 27A OF THE SECURITIES ACT AND SECTION 21E OF THE EXCHANGE ACT THAT
INVOLVE CERTAIN RISKS AND UNCERTAINTIES. DISCUSSIONS CONTAINING SUCH
FORWARD-LOOKING STATEMENTS MAY BE FOUND IN THE MATERIAL SET FORTH BELOW UNDER
"RISK FACTORS" AND "MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS," AS WELL AS IN THE PROSPECTUS GENERALLY, INCLUDING
THE DOCUMENTS INCORPORATED BY REFERENCE HEREIN. THE COMPANY'S ACTUAL RESULTS
COULD DIFFER MATERIALLY FROM THOSE ANTICIPATED IN SUCH FORWARD-LOOKING
STATEMENTS AS A RESULT OF CERTAIN FACTORS, INCLUDING THOSE SET FORTH HEREIN. FOR
A DISCUSSION OF IMPORTANT FACTORS THAT COULD AFFECT THE COMPANY'S RESULTS,
PLEASE REFER TO "RISK FACTORS" AND FINANCIAL STATEMENT LINE ITEM DISCUSSIONS SET
FORTH IN "MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
RESULTS OF OPERATIONS."
 
THE COMPANY
 
    Cyberonics manufactures and markets the NCP System, an implantable medical
device for the treatment of epilepsy. On July 16, 1997, the Company received
approval from the FDA to market the NCP System in the United States as an
adjunctive therapy for reducing the frequency of seizures in patients over
twelve years of age with partial onset seizures that are refractory (resistant)
to antiepileptic drugs ("AEDs"). The Company has also received regulatory
approval to sell the NCP System in Canada, Europe and certain countries in the
Far East. The Company has completed a total of seven clinical studies, including
five controlled acute phase studies involving over 450 patients, a long-term
multi-year follow-up study involving 253 patients and a mortality study. To
date, over 1,000 patients have accumulated in excess of 2,000 patient years of
treatment experience with the NCP System.
 
EPILEPSY OVERVIEW
 
    Epilepsy is a disorder of the brain characterized by recurrent seizures.
Epileptic seizures are categorized as either partial or generalized at onset.
Generalized seizures, known as "grand mal" seizures, involve the entire brain
from the onset, result in the loss of consciousness and are typically manifested
by convulsions. Partial onset seizures initiate in a localized region of the
brain, and may or may not result in the loss of consciousness. Partial onset
seizures can also develop into generalized seizures. Patients who continue to
have unsatisfactory seizure control or intolerable side effects after treatment
with appropriate antiepileptic therapies for a reasonable period of time are
said to suffer from refractory epilepsy. For reasons that are not clear, partial
onset seizures are generally more refractory to existing therapies than
generalized seizures.
 
    It is estimated that over 1.8 million individuals are currently being
treated for epilepsy in the United States, with over 117,000 new cases diagnosed
each year, and that there are in excess of three million individuals being
treated for epilepsy in Western Europe and Japan, with over 210,000 new cases
diagnosed each year. In addition, it is estimated that approximately 50% of
patients with epilepsy suffer from partial onset seizures and that over 20% of
these patients suffer from refractory partial onset seizures.
 
    The medical, psychological, sociological and financial implications of
refractory epilepsy can be profound for individuals and their families. Seizures
can be severely debilitating and may result in major irreversible morbidity
(lasting complications or side effects). Medical consequences may include brain
damage from recurrent seizures, injuries and accidents associated with the loss
or impairment of consciousness, and death as the result of severe seizures.
Personal implications of epilepsy may include suffering the side effects of
AEDs, strained personal and family relations, and the inability to obtain and
hold meaningful employment or a driver's license. Societal implications of
epilepsy include the loss or underutilization of potentially productive citizens
and the cost of long-term public assistance for those disabled by epilepsy.
Epilepsy patients, in general, and refractory patients, to a greater extent,
experience a significantly higher mortality rate than the general population.
 
                                       21
<PAGE>
TRADITIONAL EPILEPSY THERAPIES
 
    Traditionally, there have been two courses of treatment available to persons
suffering from epilepsy: drug therapy and surgery. The efficacy of these
treatments depends in part upon the type of seizures from which a patient
suffers. The efficacy of drugs and surgery for patients suffering from partial
onset seizures is highly variable.
 
    DRUG THERAPY.  AEDs serve as a first-line treatment and are prescribed for
virtually all individuals being treated for epilepsy. There are eight drugs
predominately used for the treatment of epilepsy which are used either alone or
in combination. Lack of patient compliance, which is typical of chronic drug
therapy, inherently reduces the efficacy of a drug therapy regimen. In addition,
side effects are common with AEDs. Side effects range from debilitating central
nervous system conditions such as drowsiness, confusion and cognitive impairment
to life-threatening hematologic reactions or liver failure. Women taking AEDs
are more likely to bear infants with birth defects than the general population.
Children receiving AED therapy often experience learning difficulties. Since
1993, four new AEDs have received FDA approval. No other major AEDs have been
introduced in the United States since 1978. While each of these AEDs
demonstrates some efficacy or tolerability benefits when compared with other
AEDs, the Company believes that none of these AEDs appears to provide
significantly improved clinical outcomes. See "--Competition."
 
    SURGICAL TREATMENT.  When drug therapy is not effective, the other
traditional treatment alternative has been surgical removal of the portion of
the brain where seizures originate. Surgical treatment of epilepsy has been
proven safe and beneficial for a limited number of patients. It is estimated
that only approximately 1,500 epilepsy surgeries are performed per year in the
United States. The Company believes that the low number of surgeries is
attributable to several factors, including: the extensive evaluation and testing
required to screen candidates for surgery and to localize the source of the
seizures; the risks of morbidity and mortality associated with brain surgery;
the uncertainty of long-term benefits; the non-reversible nature of the
procedure; and the cost of evaluation, testing and surgery, which is reported to
be approximately $60,000 in many cases.
 
THE CYBERONICS SOLUTION
 
    The Company's FDA approved NCP System is the only currently approved medical
device alternative for treating epilepsy. The NCP System delivers an electrical
signal through an implantable lead to the left vagus nerve in the patient's neck
on a chronic, intermittent basis. Stimulation may also be initiated by the
patient with a hand held magnet.
 
    The Company believes that a successful new therapy for refractory epilepsy
should be clinically proven, provide significant seizure control, be safe and
tolerable with few side effects, provide long-term benefits and be easy for the
physician to prescribe and for the patient to use. Based on the results of its
preclinical studies, mechanism of action research and seven human clinical
trials, the Company believes that the NCP System meets these criteria:
 
        CLINICALLY PROVEN.  To date over 1,000 patients have accumulated in
    excess of 2,000 patient years of treatment experience with the NCP System.
    On July 16, 1997, the NCP System was approved by the FDA for use as an
    adjunctive therapy in reducing frequency of seizures in adults and
    adolescents over twelve years of age with partial onset seizures that are
    refractory to AEDs.
 
        SIGNIFICANT SEIZURE CONTROL.  In the Company's two randomized, parallel,
    double blind active control studies, the treatment groups reported a mean
    seizure reduction of approximately 24% and 28% during the three month acute
    phase of the studies. Additionally, many patients, including some who
    reported no change or an increase in seizure frequency, also reported a
    reduction in seizure severity.
 
                                       22
<PAGE>
        WELL-TOLERATED SIDE EFFECTS.  The side effects associated with the NCP
    System are generally mild, localized and stimulation related. They include
    hoarseness, coughing, a feeling of shortness of breath and throat pain. The
    NCP System has not been associated with the debilitating central nervous
    system side effects which frequently accompany AEDs. Additionally, over
    time, a significant percentage of patients continued to use the therapy
    attesting to its tolerability. See "--Clinical Trials."
 
        LONG-TERM EFFICACY.  Long-term follow-up data, although derived from an
    uncontrolled protocol, on the 253 patients in the Company's first four
    studies suggests that efficacy is maintained and for certain patients
    improves over time when the NCP System is used as an adjunctive therapy with
    drugs as part of a patient's optimized long-term treatment regime. Analysis
    of this pooled data showed that the median percent seizure reduction
    increased from 17% in the first three months to 44% after 18 months of
    treatment. See "--Clinical Trials."
 
        EASY TO USE.  The implantation procedure is a straightforward, fully
    reversible procedure which takes between 30 minutes and two hours, does not
    involve the brain and has been performed by surgeons with a variety of
    specializations. Additionally, the NCP System does not interact with
    existing therapies and, because the NCP System provides continuous
    stimulation without patient (or caregiver) administration, full compliance
    is assured. Moreover, a patient can use a magnet to temporarily override the
    pre-programmed stimulation cycle to activate on-demand therapy if the
    patient senses the onset of a seizure.
 
VAGUS NERVE STIMULATION WITH THE CYBERONICS NCP SYSTEM
 
    The NCP System is a proprietary, integrated system consisting of an
implantable device that delivers an electrical signal to an implantable lead
which is attached to the left vagus nerve. The vagus nerve is the longest of the
cranial nerves, extending from the brain stem through the neck to organs in the
chest and abdomen. The left vagus nerve has been shown to have influence over
numerous areas of the brain. Preclinical studies and mechanism of action
research suggest that intermittent stimulation of the left vagus nerve in the
neck activates a number of structures and increases blood flow in several areas
of the brain. These studies have also shown that stimulation of the left vagus
nerve is effective in blocking seizures and results in persistent or carryover
antiepileptic effects which increase with chronic stimulation.
 
    The NCP System consists of the NCP Generator, the vagus nerve lead, the
programming wand and software and the tunneling tool. The NCP Generator and
vagus nerve lead are surgically implanted in a procedure which takes from 30
minutes to two hours, during which time the patient is typically under general
anesthesia. The NCP Generator is surgically implanted in a subcutaneous pocket
in the upper left chest. The vagus nerve lead is connected to the NCP Generator
and attached to the vagus nerve in the lower left side of the patient's neck.
The patient is generally admitted to the hospital the day of surgery and
discharged the following day.
 
    The NCP System delivers vagus nerve stimulation therapy on a chronic,
intermittent basis. These stimulation parameters are preprogrammed by the
treating physician. The standard stimulation parameters recommended by the
Company are a 30 second period of stimulation, followed by a five minute period
without stimulation. To optimize patient treatment, the pulse width, output
current, signal frequency and stimulation duration and intervals of the NCP
Generator can be noninvasively programmed and adjusted by the treating physician
with a personal computer using the Company's programming wand and software. In
addition, the patient can use a small, hand held magnet which is provided with
the NCP Generator to manually activate or deactivate stimulation. On-demand
therapy can be useful for those patients who sense an oncoming seizure and has
been reported by a number of patients to abort or reduce the severity of
seizures.
 
                                       23
<PAGE>
[Illustration showing placement of the NCP System in a patient and a description
of its components]
 
    NCP GENERATOR.  The NCP Generator is an implantable, programmable, cardiac
pacemaker-like signal generator designed to be coupled with the vagus nerve lead
to deliver electrical signals to the vagus nerve. The NCP Generator approved for
use in the United States employs a battery and has an expected life of
approximately 4.5 years at standard stimulation parameters. The Company has
begun to sell an NCP Generator outside of the United States which employs a
battery which has an estimated life of approximately 6.5 years at standard
stimulation parameters. The Company intends to seek FDA approval to market this
newer NCP Generator in the United States. Upon expiration of the battery, the
NCP Generator is removed and a new generator is implanted in a short,
out-patient procedure using local anesthesia.
 
    VAGUS NERVE LEAD.  Cyberonics has licensed a proprietary nerve lead to
convey the electrical signal from the NCP Generator to the vagus nerve. The lead
incorporates patented electrodes which are self-sizing and flexible, minimizing
mechanical trauma to the nerve and allowing body fluid interchange within the
nerve structure. The lead's two electrodes and anchor tether wrap around the
vagus nerve and the connector end is tunneled subcutaneously to the chest where
it is attached to the NCP Generator. The leads are available in two sizes of
inner spiral diameter to ensure optimal electrode placement on different size
nerves.
 
    PROGRAMMING WAND AND SOFTWARE.  The Company's proprietary programming wand
and software are used to transmit programming information from a personal
computer to the NCP Generator via electromagnetic signals. Programming
capabilities include modification of the NCP Generator's programmable parameters
(pulse width, output current, signal frequency and stimulation duration and
interval), and
 
                                       24
<PAGE>
storage and retrieval of telemetry data. The NCP programming wand can be
connected to an industry standard personal computer using a serial connector.
 
    TUNNELING TOOL.  The tunneling tool is a disposable surgical tool designed
to be used during surgical placement of the vagus nerve lead. The tool is used
for subcutaneous tunneling of the lead assembly between the nerve site in the
neck and the NCP Generator site in the chest.
 
    The total cost of the NCP System to the patient, including the implant
procedure, is projected to be
between approximately $13,000 and $18,000. This projected cost includes
approximately $8,000 for the NCP System plus hospital costs and physician fees,
which vary depending upon the implanting center.
 
CLINICAL TRIALS
 
    The Company began trials of the NCP System for the treatment of refractory
partial onset seizures in November 1988. As of June 30, 1997, a total of seven
clinical studies have been conducted, consisting of five controlled acute phase
studies involving over 450 patients, a long-term follow-up study involving 253
patients, and a mortality study involving approximately 791 patients with 1,335
patient years of experience. A total of 45 centers participated in these
studies, including 40 in the United States, two in Germany and one each in
Canada, Holland and Sweden. Of the five controlled acute phase studies, two were
randomized, parallel, double blind, active control studies, similar in design to
AED trials. These two studies, E03 and E05, involved 388 enrolled and 310
implanted patients who were included in the efficacy analysis. The duration of
the baseline and treatment periods in both studies was three months. The
following table summarizes the Company's five acute phase clinical studies:
<TABLE>
<S>          <C>           <C>                          <C>
   -----------------------------------------------------------------------------------
 
<CAPTION>
                                     DESIGN/               NUMBER OF PATIENTS INCLUDED
   STUDY         DATE            SEIZURE TYPE(S)               IN EFFICACY ANALYSIS
<S>          <C>           <C>                          <C>
  E01/E02        1988             Single blind/                         14
                                Partial seizures
    E03       1990-1992     Double blind, randomized/                  114
                                Partial seizures
    E04       1991-1995        Open label safety/                      116
                                  All seizures
    E05       1995-1996     Double blind, randomized/                  196
                                Partial seizures
</TABLE>
 
    ACUTE PHASE EFFICACY.  The primary efficacy objective of the Company's
double blind randomized acute phase clinical studies was to demonstrate a
between group difference in mean and/or median percent change in seizure
frequency between patients treated with "High" stimulation (stimulation believed
to be at therapeutic levels for seizure reduction) and "Low" stimulation
(stimulation believed to be at subtherapeutic levels). The primary efficacy
outcome was achieved in both E03 and E05. In the longitudinal studies, E01, E02
and E04, the primary efficacy outcome was a within group difference in mean or
median percent change in seizure frequency compared to baseline. These
longitudinal studies also achieved their
 
                                       25
<PAGE>
primary efficacy objectives. The following table summarizes the mean and median
percentage seizure reduction rates of the treatment groups of the Company's five
acute phase studies:
 
<TABLE>
<CAPTION>
                                                                            PERCENTAGE SEIZURE
                                                                           REDUCTION RATES FOR
                                                                             TREATMENT GROUP
                                                                         ------------------------
STUDY                                                                       MEAN        MEDIAN
- -----------------------------------------------------------------------  -----------  -----------
<S>                                                                      <C>          <C>
E01....................................................................       24.3%        31.6%
E02....................................................................       39.9%        48.1%
E03....................................................................       23.6%        22.6%
E04....................................................................        7.0%        21.8%
E05....................................................................       27.9%        23.4%
</TABLE>
 
    ADVERSE EVENTS, SIDE EFFECTS.  The two randomized, parallel studies, E03 and
E05, involved 314 patients who accumulated total acute phase and long-term
follow-up exposure of 591 years. The most frequently reported side effects were:
voice alteration/hoarseness which was reported by 50% of patients at least once
during the acute and extension phases, cough which was reported by 41% of
patients, throat pain/discomfort which was reported by approximately 27% of
patients, and dyspnea, a feeling of shortness of breath, which was reported by
18% of patients at least once in the E03 and E05 acute and extension phases. The
NCP System side effects were generally rated as mild, reportedly occurred only
during actual stimulation and were reported less frequently over time. No
adverse effects of vagus nerve stimulation on the heart, lungs or stomach were
observed in any of the studies. The NCP System also did not produce the
debilitating central nervous system conditions such as drowsiness, confusion and
cognitive impairment commonly associated with AEDs.
 
    LONG-TERM EFFICACY.  In addition to the acute phase studies, the Company
also provided the FDA with long-term follow-up data on the 253 E01 through E04
study patients. The long-term data comes from an uncontrolled open label
protocol where both AEDs and NCP device settings were allowed to be changed. In
the Company's long-term follow-up on patients in studies E01 through E04, a
total of 238 out of a possible 251 completed one year of therapy (95%); 142 out
of 172 completed two years of therapy (83%); and 88 out of 126 completed three
years of therapy (70%).
 
    Long-term efficacy results, although derived from an uncontrolled protocol,
indicate that efficacy is maintained and, for many patients, improves during the
first 18 months when the NCP System is used as adjunctive therapy with drugs as
part of an optimized treatment regimen. The pooled E01 through E04 results
indicate that the median percent seizure reduction increased from 17.1% at the
end of the three month acute phase to a median reduction of 44.3% after 18
months of treatment. The percent of patients reporting a greater than 50%
reduction compared to baseline showed a similar improvement. The pooled results
indicate that 25.0% of the pooled patients reported a greater than 50.0%
reduction after three months of treatment and that 42.9% of patients reported a
greater than 50.0% reduction after 18 months.
 
    Although available long-term clinical data reveal continuing improved
efficacy over the first 18 months of use, this data indicates that improvement
stabilizes thereafter. Data regarding the longer term safety and efficacy of the
NCP System are limited. In addition, although the Company has theories as to why
vagus nerve stimulation reduces epileptic seizures, uncertainty still exists as
to the basic mechanism that provides positive therapeutic effects. There can be
no assurance that the efficacy of the treatment will continue to improve or will
not decline over time, or that long-term operation of the NCP System will not
produce adverse side-effects or cause harm or death to patients. Any such
negative long term effects could adversely affect the regulatory status and/or
market acceptance of the NCP System and thus adversely affect the Company's
business, financial condition and results of operations.
 
                                       26
<PAGE>
    DEVICE COMPLICATIONS.  During the Company's clinical trials, technical
complications occurred due to lead wire fractures, battery depletion and NCP
Generator malfunctions. Two significant generator complications occurred. One
generator malfunction occurred in 1991 which resulted in permanent paralysis of
one patient's left vocal cord. This malfunction was reported to the FDA as a
serious adverse event. Subsequent design changes were made and, since those
changes, no similar malfunctions have occurred. The second generator malfunction
was premature battery depletion due to an unexplained transient high current
drain which had no adverse effect on the patient. No similar malfunctions have
occurred. Over fifty leads have been verified to have broken or otherwise
developed high impedence. The Company made a series of changes in early lead
designs to address these issues, and over 500 of the latest generation leads
have been implanted with no reported failures due to lead design, materials or
manufacturing.
 
    Although the Company has made several design changes in its generator and
leads and has not recently experienced malfunctions or failures, there can be no
assurance that there will not be future failures which could result in an unsafe
condition in patients. The occurrence of such malfunctioning or other adverse
reactions could result in a recall of the Company's products, possibly requiring
removal (and potentially reimplantation) of the NCP Generator and/or leads. Any
product recall could have a material adverse effect on the Company's business,
financial condition and results of operations.
 
    MORTALITY STUDY.  As of June 30, 1997, a total of 17 deaths were reported
among the clinical and commercial patients implanted with the NCP System, ten of
which were considered to be possible/ probable/definite SUDEP (Sudden
Unexplained Death in Epilepsy Patients). Although treatment was underway at the
time, no deaths have been linked to the implantation of or stimulation by the
NCP System. Based on the 17 deaths, there was a mortality rate in the NCP cohort
of 10.3/1,000 patient years and a SUDEP incidence of 3.0/1,000 patient years for
definite/probable and 5.0/1,000 patient years for definite/ possible/probable.
The mortality rate and SUDEP rates for the NCP cohort are within the ranges
expected by a panel of independent experts for a medically refractory epilepsy
population. The mortality data was included in the Company's submissions to the
FDA in connection with its PMA application.
 
    FUTURE STUDIES.  The Company's intends to sponsor additional clinical trials
for the NCP System, initially for additional epilepsy indications such as
Lennox-Gastaut Syndrome and generalized seizures and, in the future, for other
neurological disorders outside the field of epilepsy which are covered by the
Company's method patent portfolio. New clinical trials conducted in the United
States will require additional FDA approvals.
 
STRATEGY
 
    The Company's strategy is to establish vagus nerve stimulation as a
preferred means for treating patients who suffer from refractory partial
seizures. The following are key elements of the Company's strategy:
 
LAUNCH THE NCP SYSTEM IN THE UNITED STATES
 
    The NCP System received FDA approval for the treatment of epilepsy patients
suffering from refractory partial onset seizures in July 1997. The Company
intends to launch the NCP System in the United States through a direct sales
force that will target the epileptologists and neurologists involved in treating
patients suffering from epilepsy. The Company has increased its U.S. sales and
marketing staff from 1 professional at June 30, 1996 to 20 professionals at June
30, 1997 and intends to further increase this staffing. In order to create
physician awareness and patient demand, the Company plans to implement a
multi-faceted marketing approach that includes symposia in the United States to
introduce the NCP System, ongoing physician awareness and training programs,
education and support of patient advocacy groups such as the Epilepsy Foundation
of America, publication of peer-reviewed scientific articles concerning the NCP
System and the Company's clinical trials, and dissemination of public
information regarding the benefits of the NCP System for patients suffering from
epilepsy.
 
                                       27
<PAGE>
INCREASE INTERNATIONAL MARKET PENETRATION
 
    In June 1994, the Company was granted regulatory approval to market the NCP
System in the twelve-member countries of the European Union. Due to resource
constraints, however, the Company did not devote significant resources to
marketing the NCP System internationally until fiscal 1997. The Company's sales
strategy in international markets is to use a direct sales force in certain key
markets and to rely upon distributors to reach additional markets. The Company
intends to leverage its United States product launch activities to expand its
sales and marketing activities in the European Union member countries and other
key international markets.
 
ESTABLISH REIMBURSEMENT BY THIRD-PARTY PAYORS
 
    The Company believes that significant market acceptance of the NCP System
for the treatment of epilepsy or other indications will require that the
treatment be eligible for reimbursement from government and private health care
payors in the United States and overseas. The Company is in the process of
seeking the appropriate coverage recommendations from government sources and
from private payor groups. The Company believes that hospitals will gain
adequate reimbursement for the NCP System based on the compelling safety and
efficacy of the NCP System, the debilitating nature and annual cost of treating
refractory epilepsy, and the efficacy and cost of alternative treatments. See
"--Third-Party Reimbursement."
 
EXPAND RANGE OF TREATABLE INDICATIONS
 
    The Company believes that additional epilepsy types, including
Lennox-Gastaut Syndrome and generalized seizures, as well as severe neurological
disorders outside the field of epilepsy, including movement disorders such as
essential tremor and Parkinson's disease, chronic pain and migraine headaches,
may be amenable to treatment by vagus nerve stimulation with the NCP System. The
Company has been granted method patents relating to the use of vagus nerve
stimulation for the treatment of these and certain other neurological disorders,
and plans to establish a program to discover and develop new applications for
the NCP System both within and outside the field of epilepsy. See "--Product
Development."
 
MARKETING AND SALES
 
    UNITED STATES.  The NCP System was approved for sale in the United States on
July 16, 1997 for use as an adjunctive therapy in reducing the frequency of
seizures in adults and adolescents over twelve years of age with partial onset
seizures that are refractory to AEDs. The Company intends to sell its products
through a direct sales force in the United States. As of August 1, 1997 the
United States sales and marketing team consisted of sixteen direct sales people
(including a Vice President of Sales, four area Directors and eleven territory
managers), all of whom have significant medical device sales experience, and
three national marketing professionals supported by experienced medical device
reimbursement consultants. The Company expects to continue expanding its
marketing and sales team as needed.
 
    The Company's sales and marketing plan focuses on reaching those physicians
who treat a large number of refractory partial onset seizure patients. To date,
only a limited number of neurologists have experience treating patients with the
NCP System throughout the United States. In the United States there are a
limited number of neurologists and epileptologists (neurologists who specialize
in epilepsy). The Company believes that a subset of these neurologists and
epileptologists treat most epileptic patients. The Company intends initially to
target these neurologists and epileptologists.
 
    The Company believes that physician acceptance of new medical products like
the NCP System is typically a function of both the clinical utility of the
product, as demonstrated by preclinical studies, mechanism of action research
and human clinical trials, and the credibility of the data supporting the
product's claims regarding safety, efficacy and clinical utility. Resources used
to support sales of medical devices, such as the NCP System, include physicians
who have used the product, peer reviewed medical
 
                                       28
<PAGE>
journal articles, the Company's Physician's Manual and the data published by the
FDA in the Summary of Safety and Effectiveness. The Company intends to use all
of these sources to gain acceptance of the NCP System. In addition, in June
1997, the Company sponsored a symposium at the International Epilepsy Congress
in Dublin, Ireland, which over 150 physicians attended, and in August 1997, the
Company is sponsoring the first North American vagus nerve stimulation symposia
in Colorado Springs, Colorado.
 
    To enhance patient awareness, the Company intends to, among other things,
educate and support national, regional and local epilepsy patient advocacy
groups, such as the Epilepsy Foundation of America to provide information on the
NCP System on web sites, in newsletters, at meetings and via mailing lists. The
Company also intends to provide information directly to patients and to work
with experienced centers in co-marketing arrangements.
 
    INTERNATIONAL.  Although the Company obtained the CE Mark to sell the NCP
System in the member countries of the European Union in June 1994, through the
end of calendar 1996, the Company focused its resources and efforts primarily on
the clinical trials necessary to gain FDA approval to sell the NCP System in the
United States. As a result, the Company until recently devoted only limited
resources to international marketing and sales activities. The Company began
building its international marketing and sales organization in fiscal 1997. In
January 1997, the Company established an International Advisory Board consisting
of epileptologists, neurologists, neurosurgeons and clinical scientists from
Belgium, France, Germany, Italy, Sweden, the United Kingdom and the United
States. As of June 30, 1997, the Company's international sales and marketing
organization consisted of nine full time employees and approximately 28
independent distributors. The NCP System was officially launched at the
Company's vagus nerve stimulation symposium at the International Epilepsy
Congress in Dublin, Ireland on June 28, 1997.
 
    The NCP System is currently sold by a direct sales force in Germany, France,
Austria, Switzerland and the United Kingdom. One of the Company's customers in
the United Kingdom, King's College, accounted for approximately 13% of the
Company's net sales in fiscal 1997. As of June 30, 1997, the Company had
distribution agreements or letters of intent with independent distributors
covering 24 countries including, among others, Australia, China, Italy, The
Netherlands, Spain and Sweden. The distribution agreements generally grant the
distributor exclusive rights for the particular territory for a period of three
years. The distributor generally assumes responsibility for obtaining regulatory
and reimbursement approvals for such territory and agrees to certain minimum
marketing and sales expenditures and purchase commitments.
 
    The Company believes that its success internationally is dependent upon the
acceptance of the NCP System by a concentrated number of key opinion-leading
epileptologists and neurologists. The Company estimates that there are
approximately 200 key opinion-leading epileptologists in Western Europe alone.
These opinion leaders treat a large number of refractory patients, have
significant influence over the treatment decisions made by secondary centers and
are often critical to obtaining approvals for adequate reimbursement coverage in
their respective countries. The Company has implemented several programs to
target these epileptogists, including the International Advisory Board,
international clinical research programs and an international patient registry.
 
    The Company intends to leverage its United States product launch activities,
including the experiences of leading epileptologists and neurologists in the
United States to seek market acceptance of the NCP System in other countries.
Physicians from the United States familiar with the NCP System have in the past
presented their experiences and study results at international symposia, and the
Company intends to continue this practice.
 
    The Company intends to seek additional regulatory and reimbursement
approvals in the future in those major markets where the NCP System is not
approved. The geographic areas initially targeted include South America and the
Far East, in particular, Japan. In Japan, the Company is working with an
independent distributor to obtain the appropriate regulatory and reimbursement
approvals and to ultimately distribute the NCP System if such approvals are
obtained. The Japanese clinical trial began in July 1993. To date, 34 patients
have been implanted and treated for an average of 2.5 years. The Company's
Japanese distributor expects to submit the results of this study, along with the
Company's other
 
                                       29
<PAGE>
clinical trial data, in calendar 1997 to the Japanese Ministry of Health for
regulatory approval. Application for reimbursement approval will follow
regulatory approval when and if granted.
 
MANUFACTURING AND SOURCES OF SUPPLY
 
    Cyberonics' manufacturing operations are required to comply with the FDA's
QSR, which incorporates the agency's former Good Manufacturing Practices
regulations. QSR addresses the design, controls, methods, facilities and quality
assurance controls used in manufacturing, packing, storing and installing
medical devices. In addition, certain international markets have quality
assurance and manufacturing requirements that may be more or less rigorous than
those in the United States. Specifically, the Company is subject to the
compliance requirements of ISO 9001 and 9001 certification and CE Mark
directives. The Company is audited on a semiannual basis for such compliance.
See "--Government Regulation."
 
    The NCP Generator, which is similar in design and manufacture to a cardiac
pacemaker, is comprised of two printed circuit boards and a battery which are
hermetically sealed in a titanium case. Standard components are assembled on
printed circuit boards by a contract manufacturer using surface-mount
technology. The boards are then shipped to the Company for assembly and testing.
The assembled electronics are then placed in a titanium case which is shipped to
a third-party for laser welding and returned to the Company for attachment of an
epoxy header to which the lead connects and for final testing. Sterilization of
the NCP Generator is performed by a third-party.
 
    The Company has a limited history of operations that, to date, has consisted
primarily of manufacturing limited quantities of NCP Systems for clinical
investigations and for commercial sales activities in international markets. The
Company does not have experience manufacturing the NCP Systems in the volumes
that will be necessary to achieve significant commercial sales. The Company is
currently negotiating a lease for a new facility, and intends to move all of its
manufacturing operations to the new facility, which is expected to begin
production in early calendar 1998. The Company may encounter difficulties in
scaling up production of the NCP System, in procuring the necessary supply of
materials, components and contract services, or in hiring and training
additional manufacturing personnel to support domestic and international demand.
The Company will be required to obtain FDA approval for this change in the
manufacturing facility. The new manufacturing facility will also have to be
inspected for compliance with the FDA's QSR and ISO 9001 and 9002 standards,
which impose certain procedural and documentation requirements with respect to
device design, development, manufacturing and quality assurance activities,
before the Company can begin commercial-scale production of the NCP System at
the new manufacturing facility. In addition, one of the Company's contract
manufacturers has moved its manufacturing operations to a new facility. The
Company will be required to obtain FDA approval of for the change in the
location of the contractor's manufacturing facility, which generally requires a
preapproval inspection by the FDA to determine the contractor's compliance with
the QSR. There can be no assurance that the Company will be able to obtain the
necessary FDA and other approvals for its or its contract manufacturers' new
facilities on a timely basis, or at all. If the Company is unable to achieve
commercial-scale production capability on a timely basis with acceptable quality
and manufacturing yield and costs, to sustain such capacity, or to achieve FDA
and other governmental approvals, the ability of the Company to deliver products
on a timely basis could be impaired which could have a material adverse effect
on the Company's business, financial condition or results of operations.
 
    The Company relies upon sole source suppliers for certain of the key
components, materials and contract services used in manufacturing the NCP
System. The Company periodically experiences discontinuation or unavailability
of components, materials and contract services which may require qualification
of alternative sources or, if no such alternative sources are identified,
product design changes. The Company believes that pursuing and qualifying
alternative sources and or redesigning specific components of the NCP System
will consume significant Company resources. In addition, such changes generally
require regulatory submissions and approvals. Although the Company believes that
any such changes will be made without disruption, any extended delays in or
inability to secure alternative sources for these or other
 
                                       30
<PAGE>
components, materials and contract services could result in product supply and
manufacturing interruptions which could have a material adverse effect on the
Company's ability to manufacture the NCP System on a timely and cost competitive
basis, and therefore on its business, financial condition or results of
operations.
 
PRODUCT DEVELOPMENT
 
    Cyberonics' product development efforts are directed toward improving the
NCP System and developing new products which provide additional features and
functionality. Product development programs that are underway include ongoing
improvements to the NCP Generator, such as reduced size and increased battery
life. The Company intends to file an application with the FDA for a battery
which has an expected life of approximately 6.5 years at standard stimulation
parameters. This unit is already approved for sale in the European market. These
and other longer term development activities are expected to be technically
challenging and no assurance can be given that they will result in marketable
products. The Company will be required to file for the appropriate United States
and international regulatory approvals, and undergo clinical trials, in
connection with the introduction of improved and new products. See "--Government
Regulation."
 
COMPETITION
 
    The Company believes that existing and future AEDs will be the primary
competition for its NCP System. The Company may also face competition from other
medical device companies for the treatment of partial seizures. Medtronic, Inc.
has clinically assessed an implantable signal generator used with an invasive
deep brain probe (thalamic stimulation) for the treatment of neurological
disorders and has received FDA approval for the device for the treatment of
essential tremor, including that associated with Parkinson's disease. The
Company could also face competition from other large medical device companies
which have the technology, experience and capital resources to develop
alternative devices for the treatment of epilepsy. Many of the Company's
competitors have substantially greater financial, manufacturing, marketing and
technical resources than the Company and have obtained third-party reimbursement
approvals. In addition, the health care industry is characterized by extensive
research efforts and rapid technological progress. There can be no assurance
that the Company's competitors will not develop technologies and obtain
regulatory approval for products that are more effective in treating epilepsy
than the Company's current or future products. There can also be no assurance
that advancements in surgical techniques will not make surgery a more attractive
therapy for epilepsy. The development by others of new treatment methods with
novel AEDs, medical devices or surgical techniques for epilepsy could render the
NCP System non-competitive or obsolete. There can be no assurance that the
Company will be able to compete successfully against current and future
competitors or that competition, including the development and commercialization
of new products and technology, will not have a material adverse effect on the
Company's business, financial condition or results of operations.
 
    Cyberonics believes that the primary competitive factors within the epilepsy
treatment market are the efficacy and safety of the treatment relative to
alternative therapies, physician and patient acceptance of the product and
procedure, availability of third-party reimbursement and product reliability.
The Company believes that the NCP System compares favorably with competitive
products as to these factors.
 
PATENTS, LICENSES AND PROPRIETARY RIGHTS
 
    Proprietary protection for the Company's products is important to the
Company's business. The Company maintains a policy of seeking method and device
patents on its inventions, acquiring licenses under selected patents of third
parties, obtaining copyrights on its software and other copyrightable materials
and entering into invention and proprietary information agreements with its
employees and consultants with respect to technology which it considers
important to its business. Cyberonics also relies upon trade secrets, unpatented
know-how and continuing technological innovation to develop and maintain its
competitive position.
 
                                       31
<PAGE>
    The Company entered into an exclusive license agreement with Dr. Jacob
Zabara, a co-founder of and consultant to the Company, pursuant to which the
Company has licensed three United States method patents (and such international
counterparts as have been or may be issued) covering the NCP System for vagus
nerve and other cranial nerve stimulation for the control of epilepsy and other
movement disorders. The License Agreement runs for the term of licensed patents.
Pursuant to the license agreement, the Company is obligated to pay Dr. Zabara a
royalty equal to the greater of $36,000 per year or 6% of net sales of the NCP
System on the first $12 million in cumulative sales, and at the rate of 3%
thereafter for the remaining term of the licensed patents.
 
    The Company entered into a license agreement with Huntington Medical
Research Institute pursuant to which the Company has licensed two United States
patents (and their international counterparts, if and when issued) covering two
lead designs. The license agreement provides a license to the licensor's lead
designs for the field-of-use of vagus nerve stimulation for control of epilepsy
and other movement disorders. Pursuant to the license agreement, as amended, the
Company paid an initial license fee of $200,000. In addition, the Company has a
renewable option to expand the licensed field-of-use for additional indications
for a license fee of $15,000 per indication. Pursuant to the license agreement,
the Company is obligated to pay the licensor a royalty of 1% of net sales of NCP
Systems using the licensor's standard lead (the Company's vagus nerve lead is a
standard lead) and 1.75% of net sales of NCP Systems which include the
licensor's bidirectional lead. The Company also paid royalties during fiscal
1995 and during each of fiscal 1996 and 1997, and has agreed to pay minimum
royalties of $35,000 for fiscal 1998 and each fiscal year thereafter for the
life of the licensed patents. In fiscal 1997, the Company elected not to make
payment of at least $200,000 under this license, and as a result, the licensor
may convert the license regarding the bidirectional lead to a non-exclusive
license.
 
    In addition to the license agreements, as of June 30, 1997, the Company had
United States patents and patent applications pending covering NCP Generator
circuits, electrode designs and various therapeutic applications of vagus nerve
stimulation. In addition to movement disorders, recently issued method patents
cover the fields of eating disorders, endocrine disorders, migraine headaches,
dementia, neuropsychiatric disorders, motility disorders and chronic pain. The
Company has also licensed protection for stimulation of other cranial nerves for
most of the above disorders. The Company currently intends to file for a limited
extension of the term of one of the medical device and method patents under
which it is licensed from Dr. Zabara. The Company has filed counterparts of
certain of its key United States patent applications in certain key
international jurisdictions.
 
    There can be no assurance that patents will issue from any of the remaining
applications or, if patents are issued, that they will be of sufficient scope or
strength to provide meaningful protection of the Company's technology. In
addition, there can be no assurance that any patents issued to the Company will
not be challenged, invalidated or circumvented, or that the rights granted
thereunder will provide proprietary protection or commercial advantage to the
Company. Notwithstanding the scope of the patent protection available to the
Company, a competitor could develop other methods of controlling epilepsy by
stimulation which do not involve the vagus or other cranial nerves, the
stimulation of which is patent protected, or which use electrodes which are not
covered by the licensed patents.
 
    Cyberonics believes that the licenses described above provide it with
protection in the United States in the field of cranial nerve stimulation,
including vagus nerve stimulation for the control of epilepsy, movement
disorders, including Parkinson's disease and essential tremor, and additional
indications for which method patents have been issued. The protection offered by
the licensed international patents is not as strong as that offered by the
licensed United States patents due to differences in patent laws. In particular,
the European Patent Convention prohibits patents covering methods for treatment
of the human body by surgery or therapy. In addition, there has been substantial
litigation regarding patent and other intellectual property rights in the
medical device industry. Litigation, which could result in substantial cost to
and diversion of effort by the Company, may be necessary to enforce patents
issued or licensed to the Company, to protect trade secrets or know-how owned by
the Company or to defend the Company
 
                                       32
<PAGE>
against claimed infringement of the rights of others and to determine the scope
and validity of the proprietary rights of others. Adverse determinations in
litigation could subject the Company to significant liabilities to third
parties, could require the Company to seek licenses from third parties and could
prevent the Company from manufacturing, selling or using the NCP System, any of
which could have a material adverse effect on the Company's business, financial
condition or results of operations. The Company is not currently a party to any
patent litigation or other litigation regarding proprietary rights and is not
aware of any challenge to its patents or proprietary rights.
 
GOVERNMENT REGULATION
 
    The preclinical and clinical testing, manufacturing, labeling, sale,
distribution and promotion of the Company's product are subject to extensive and
rigorous regulation in the United States by federal agencies, primarily the FDA,
and by comparable state agencies and by other countries. In the United States,
the NCP System is regulated as a medical device and is subject to FDA's
premarket approval requirements. Under the Food, Drug, and Cosmetic Act, all
medical devices are classified into three classes, class I, II or III. New class
III devices, such as the NCP System, are subject to the most stringent FDA
review, and require submission and approval of a PMA before commencement of
marketing, sales and distribution in the United States.
 
    In July 1997, the Company received FDA approval to market the NCP System in
the United States for use as an adjunctive therapy in reducing the frequency of
seizures in adults and adolescents over 12 years of age with partial onset
seizures that are refractory to AEDs. While the Company has satisfied FDA's
requirements to commence domestic sales of its product, it continues to be
subject to FDA's ongoing requirements to maintain regulatory compliance.
Additionally, pursuant to the post-market surveillance conditions specified as
part of the Company's FDA marketing approval, the Company is required to conduct
clinical follow-up on a total of 50 patients during the first five years of
stimulation in order to monitor the safety and tolerability of the NCP System.
In addition, the Company has been required by the FDA to continue to provide
information about which patients benefit most from the device as well as
information on any deaths that occur in patients who have the device implanted.
There can be no assurance that additional concerns will not be raised by the FDA
in the future. The Company's business, financial condition and results of
operations are critically dependent upon ongoing compliance with FDA regulations
and requirements.
 
    The Company will be required to obtain FDA approval of a new PMA or PMA
supplement before making any change to the NCP System affecting the safety or
effectiveness of the device, including, but not limited to, new indications for
use of the device, changes in the device's performance or design specifications
and device modifications and future generation products. New PMAs and PMA
supplements generally require submission of information needed to support the
proposed change and often require additional clinical data. If the clinical
testing required to obtain the information necessary to support the change
places research subjects at risk, the Company will be required to obtain the
FDA's approval of an IDE before beginning such testing. The Company intends to
sponsor additional clinical trials of the NCP System in the United States,
initially for additional epilepsy conditions and, in the future, for
non-epilepsy neurological disorders. The Company believes that it will be
required to conduct these additional clinical trials under one or more
FDA-approved IDEs and under the auspices of one or more independent
institutional review boards ("IRBs") established pursuant to FDA regulations.
There can be no assurance that the Company will be able to obtain any required
FDA or IRB approvals for such clinical trials, the studies will be completed in
a timely manner or the data and information obtained will be sufficient to
support the filing of a new PMA or PMA supplement for the proposed charges. In
addition, international sales are subject to foreign government regulation, the
requirements of which vary substantially from country to country. The Company
has obtained certain foreign governmental approvals, including the European
Union "CE" Mark, and has applied for additional approvals. There can be no
assurance that the necessary approvals, including approval of new PMAs or
supplements to existing PMAs for the NCP
 
                                       33
<PAGE>
System, will be granted on a timely basis or at all, and delays in receipt of or
failure to receive such approvals, or the withdrawal of previously received
approvals, could have a material adverse effect on the business, financial
condition and results of operations of the Company.
 
    The Company also is required to register as a medical device manufacturer
with the FDA and state agencies and to list its products with the FDA. The
Company has registered as a medical device manufacturer with the FDA. The
Company's facilities are subject to inspection on a routine basis by the FDA for
compliance with the FDA's QSR and other applicable regulations. The Company also
is required to file Medical Device Reports with the FDA for certain product
malfunctions or where its device causes or contributes to a death or serious
injury. QSR impose procedural and documentation requirements upon the Company
with respect to product designs, manufacturing, testing, control, process
validation and similar activities. As of June 30, 1997, the Company has been the
subject of an FDA pre-PMA approval site inspection, which was completed with no
deficiencies noted. Additionally, the Company must comply with various FDA
requirements such as those governing advertising, labeling and reporting of
adverse experiences with the use of the product. New regulations governing such
matters as device tracking and post-market surveillance also may apply to the
NCP System. The FDA actively enforces regulations prohibiting marketing of
products for non-indicated uses. Failure to comply with applicable regulatory
requirements can result in, among other things, fines, suspensions or withdrawal
of approvals, confiscations or recalls of products, operating restrictions and
criminal prosecutions. Changes in existing requirements or the adoption of new
requirements could adversely affect the Company's ability to comply with
regulatory requirements. Failure to comply with regulatory requirements could
have a material adverse effect on the Company's business, financial condition
and results of operations.
 
    In addition, the Company's products are covered by FDA regulations for
implantable medical devices that require the Company to comply with certain
specific record keeping, reporting, product testing, design, safety and product
labeling requirements. The Company believes that it is in material compliance
with these requirements. There can be no assurance, however, that the Company
will be able to maintain such compliance in the future. Any such failure to
comply could have an adverse effect on the Company's business, financial
condition and results of operations.
 
    The advertising of most FDA-regulated products, including the Company's NCP
System, is subject to both FDA and Federal Trade Commission jurisdiction. The
Company also is subject to regulation by the Occupational Safety and Health
Administration and by other governmental entities.
 
    Clinical testing, manufacture and sale of the Company's products outside of
the United States are subject to regulatory approval by other jurisdictions
which may be more or less rigorous than in the United States. The Company must
comply with its ISO 9001 and 9002 certification, which is similar to the FDA's
QSR, and CE Mark directives. The Company is audited on a semiannual basis for
such compliance. The Company has received regulatory approval to market the NCP
System in the thirteen member countries of the European Union, Canada, and is
pursuing other regulatory approvals outside the United States.
 
THIRD-PARTY REIMBURSEMENT
 
    The Company's ability to commercialize the NCP System successfully will
depend in part on whether third party payors, including private healthcare
insurers, managed care plans, the United States government's Medicare and
Medicaid programs, and others, agree both to cover the NCP System, and the
procedures and services associated with the NCP System, and to reimburse
adequately for the costs of the NCP System and the related services.
 
    In deciding to cover a new therapy, third party payors base their initial
coverage decisions on several factors, including, but not limited to, the status
of the FDA's review of the product, the product's safety and efficacy, the
number of studies performed and peer-reviewed articles published with respect to
the product, and how the product and therapy compares to alternative therapies.
The Company believes that, based on all of these factors, the NCP System will
achieve favorable coverage decisions by third party
 
                                       34
<PAGE>
payors. The Company has implemented a program to provide third party payors with
the clinical and regulatory information that they will need to reach coverage
decisions, both by sending materials directly to the payors and by assisting
hospitals and physicians in their interactions with the payor. There can be no
assurance that third-party payors will view the Company and the NCP System
favorably with respect to any of the above factors, which may impede the
Company's obtaining favorable coverage decisions on a timely basis, or at all. A
failure to achieve favorable coverage decisions for the NCP System in a timely
manner could deter patients and their physicians from using the Company's
products and could have a material adverse effect on the Company's business,
financial condition or results of operations.
 
    Once a favorable coverage determination is made with respect to a product,
payors must determine the level of reimbursement for the product and related
therapy and procedures. The Company believes that coverage and reimbursement for
most epilepsy patients who may be implanted with the NCP System will need to be
obtained from third-party private payors. In making decisions about
reimbursement amounts, third party private payors typically reimburse for the
costs of newly covered devices and services using the standard methods they
employ for other products and services already covered. Many private insurers
and managed care plans use a variety of payment mechanisms, including, but not
limited to, discounted charges, per diem amounts, resource-based payment scales
and reimbursed costs. Those mechanisms have provided payment levels for many
other implantable devices that have been adequate to allow device use and
commercial success. Assuming that most payors determine to cover the NCP System
and related services, the Company expects that many of these same payment
mechanisms will provide reimbursement levels for the NCP System and related
services that physicians and hospitals will view as adequate to support use of
the NCP System.
 
    The Company believes that a significant number of epilepsy patients in the
United States are either eligible for benefits under the Medicare program or are
uninsured. The Medicare program uses a fixed-payment method (based on Diagnosis
Related Groups or DRGs) to pay for hospital inpatient services and uses a
resource-based relative value scale to pay for physicians' services. Under
current DRG groupings, hospital inpatient procedures for implanting the NCP
System are assigned to one of two different DRGs based on whether or not the
patient has complications or comorbidities (coexisting severe medical problems).
The DRG grouping that would include implantation of the NCP System for patients
without complications or comorbidities pays hospitals less than the costs of
purchasing and implanting the NCP System. The Company believes that this DRG
grouping would apply to most of the epilepsy patients covered by Medicare. In
order to assure adequate reimbursement for all epileptic patients eligible for
benefits under Medicare, the Company intends to seek changes in the DRG grouping
so that NCP System implant cases would be reclassified to other, higher-paying
DRGs.
 
    The Company has only limited experience in seeking and obtaining coverage
and payment approvals from third party payors, and there can be no assurance
that the Company would be successful in achieving coverage or adequate
reimbursement levels, or any, or that it can obtain new DRG assignments under
the Medicare program to cover the complete costs of therapy using the NCP
System. If the Company is unsuccessful in achieving coverage or adequate
reimbursement levels or in obtaining new DRG assignments, or if hospitals or
physicians view their payments as inadequate, then patients, physicians and
hospitals could be deterred from using the NCP System, which could have a
material adverse effect on the Company's business, financial condition or
results of operations.
 
PRODUCT LIABILITY AND INSURANCE
 
    The manufacture and sale of the Company's products entails the risk of
product liability claims. Although the Company maintains product liability
insurance, there can be no assurance that the coverage limits of the Company's
insurance policies will be adequate. Such insurance is expensive and in the
future may not be available on acceptable terms, if at all. A successful claim
brought against the Company in excess of its insurance coverage could have a
material adverse effect on the Company's business, financial condition or
results of operations.
 
                                       35
<PAGE>
EMPLOYEES
 
    As of August 15, 1997, the Company had 69 full-time employees, including 7
in research and development, 9 in clinical and regulatory affairs, 22 in
manufacturing and quality assurance, 24 in field sales and 7 in marketing and
administration. The Company believes that the success of its business will
depend, in part, on its ability to attract and retain qualified personnel,
including but not limited to its key officers and its Board of Directors. The
Company believes its relationship with its employees is good. There can be no
assurance that the Company will be successful in hiring or retaining qualified
personnel. The loss of key personnel, or inability to hire or retain qualified
personnel, could have a material adverse effect on the Company's business,
financial condition and results of operations.
 
PROPERTIES
 
    The Company leases approximately 25,000 square feet of office and
manufacturing space in Webster, Texas through October 1997 and a sales office in
Brussels, Belgium through January 2000. The Company intends to enter into an
operating lease agreement for a new domestic office and manufacturing facility
totaling approximately 22,000 square feet beginning in October 1997, expanding
to approximately 41,000 square feet by March 1998. The Company believes that its
current facility, together with its planned additional space, will be adequate
to meet its needs at least through June 30, 1999.
 
LEGAL PROCEEDINGS
 
    The Company is not party to any legal proceedings.
 
                                       36
<PAGE>
                                   MANAGEMENT
 
EXECUTIVE OFFICERS AND DIRECTORS OF THE COMPANY
 
    The executive officers and directors of the Company, their ages as of August
15, 1997, and certain additional information about them, are as follows:
 
<TABLE>
<CAPTION>
NAME                            AGE                       POSITION
- ------------------------------  ---   -------------------------------------------------
<S>                             <C>   <C>
Robert P. Cummins.............  43    President and Chief Executive Officer
Reese S. Terry, Jr............  55    Chairman of the Board, Executive Vice President
                                        and Secretary
John K. Bakewell..............  36    Vice President, Finance and Administration and
                                        Chief Financial Officer
Michael D. Dale...............  38    Vice President, Global Sales
William H. Duffell, Jr.,        37    Vice President, Clinical and Regulatory Affairs
  Ph.D........................
Stephen D. Ford...............  47    Vice President, Manufacturing
Shawn P. Lunney...............  34    Vice President, Marketing
Stanley H. Appel, M.D.........  64    Director
Tony Coelho...................  55    Director
Thomas A. Duerden, Ph.D.......  67    Director
Michael J. Strauss, M.D.......  44    Director
</TABLE>
 
    Mr. Cummins became a director of the Company in June 1988. He was appointed
President and Chief Executive Officer of the Company in September 1995. Until
September 1995, he was also a general partner of Vista Partners, L.P., a venture
capital partnership which he joined in 1984, a general partner of Vista III
Partners, L.P., a venture capital firm formed in 1986 and Vice President of
Vista Ventures Inc., a venture capital advisory firm. Mr. Cummins is also a
director of Sigma Circuits Inc., a manufacturer of electronic interconnect
products.
 
    Mr. Terry co-founded the Company in December 1987 and served as a Director
and Chief Executive Officer of the Company until February 1990, when he became
Chairman of the Board and Executive Vice President. Mr. Terry has also served as
Secretary of the Company from its inception and as President of the Company for
four months in 1995. From 1976 to 1986, Mr. Terry held executive positions with
Intermedics, Inc., a medical device and electronics company, including serving
as Vice President of Engineering, Vice President of Corporate Technical
Resources and, most recently, as Vice President of Quality.
 
    Mr. Bakewell joined the Company as Vice President, Finance and
Administration and Chief Financial Officer in May 1993. Prior to joining the
Company, Mr. Bakewell held the position of Chief Financial Officer with Zeos
International, Ltd., a manufacturer and direct marketer of personal computers
and related products from October 1990 until May 1993. From May 1988 to October
1990, Mr. Bakewell served as Manager with the Entrepreneurial Services Group of
Ernst & Young, an international accounting firm. From August 1983 to May 1988,
Mr. Bakewell held various positions with KPMG Peat Marwick, an international
accounting firm. Mr. Bakewell is a certified public accountant.
 
    Mr. Dale joined the Company in October 1996 as Vice President, Global Sales
and as Managing Director of the Company's international subsidiary, Cyberonics
Europe, S.A. Prior to joining the Company, Mr. Dale held positions of increasing
responsibility with St. Jude Medical, Inc., most recently as Business Unit
Director, Heart Valves for St. Jude Medical Europe from May 1994 to October 1996
and as Marketing Manager, Heart Valves and Cardiac Assist Products for St. Jude
Medical Europe from January 1991 to May 1994.
 
    Dr. Duffell joined the Company as Vice President, Regulatory and Clinical
Affairs in May 1995. Prior to joining the Company, Dr. Duffell held the position
of Director, Regulatory Affairs and Quality
 
                                       37
<PAGE>
Assurance with Bristol-Meyers Squibb Companies from April 1991 until May 1995,
where his responsibilities included the areas of regulatory affairs, quality
assurance and clinical research in both corporate and divisional capacities.
From March 1987 to March 1989, Dr. Duffell served as Senior Manager, Regulatory
Affairs and Clinical Research with Dornier Medical, Inc., a manufacturer of
extracaporial shock-wave lithotriptors and related gastrointestinal and
urological products.
 
    Mr. Ford joined the Company as Vice President, Manufacturing in March 1992.
Prior to joining the Company, Mr. Ford held the position of Manager of
Manufacturing with the Biomedical Products Division of McGaw, Inc. from
September 1987 to March 1992. From March 1983 to September 1987, Mr. Ford served
as Director of Manufacturing at Quest Medical.
 
    Mr. Lunney joined the Company in April, 1991 and served in various sales,
marketing and reimbursement planning positions until May 1996, when he became
Vice President, Marketing. Prior to joining the Company, Mr. Lunney held the
position of Sales and Marketing Manager with Perceptive Systems, Inc., a
hospital laboratory medical instrument manufacturer from December 1985 to April
1991.
 
    Dr. Appel has been a director of the Company since December 1996 and the
chair of Company's Scientific Advisory Board since its formation in 1994. Since
1992, Dr. Appel has been Chairman of the Baylor College of Medicine Department
of Neurology.
 
    Mr. Coelho has been a director of the Company since March 1997. Mr. Coelho
is the Chairman and Chief Executive Officer of ETC w/tci, the Washington-based
education, training and communications subsidiary of Tele-Communications, Inc.,
a position he held since October 1996. From January 1990 to September 1995, Mr.
Coelho served as the President and Chief Executive Officer of Wertheim Schroder
Investment Services, Inc., an asset management firm, and from October 1989 to
September 1995, he served as Managing Director of Wertheim Schroder and Co., an
investment banking firm. Mr. Coelho served in the United States House of
Representatives from California from 1979 to 1989, and served as House Majority
Whip from 1986 to 1989. Mr. Coelho is also a member of the Board of Directors of
Auto Lend Group, Inc., ICF Kaiser International, Inc., International
Thoroughbred Breeders, Inc., Service Corporation International, TEI, Inc. and
Tele-Communications, Inc.
 
    Dr. Duerden has been a director of the Company since March 1989 and an
independent business consultant since January 1990. From December 1988 through
January 1990, Dr. Duerden served as Chairman of the Board and Chief Executive
Officer of Tonometrics, Inc., a medical diagnostic device company. From 1979
through 1988, Dr. Duerden served as Chairman and Chief Executive Officer of
Electro Biology, Inc., an orthopedic device company.
 
    Dr. Strauss has been a director of the Company since March 1997. Since June
1988, Dr. Strauss served first as President and later as Corporate Vice
President and General Manager at Covance Health Economics and Outcomes Services
Inc. (formerly Health Technology Associates, Inc.), a consulting and research
services firm specializing in third-party payor issues.
 
                                       38
<PAGE>
                             PRINCIPAL STOCKHOLDERS
 
    The following table sets forth as of July 31, 1997 certain information with
respect to the beneficial ownership of Cyberonics Common Stock (i) by each
person known by Cyberonics to own beneficially more than five percent of the
outstanding shares of Cyberonics Common Stock, (ii) by each director of
Cyberonics, (iii) by each of the Chief Executive Officer and four other most
highly paid executive officers of Cyberonics who earned over $100,000 in fiscal
1997 and (iv) by all directors and executive officers as a group. Except as
otherwise noted below, Cyberonics knows of no agreements among its stockholders
which relate to voting or investment of its shares of Cyberonics Common Stock.
 
<TABLE>
<CAPTION>
                                                                                                     PERCENTAGE OF
                                                                                                   OUTSTANDING SHARES
                                                                                                        OWNED(1)
                                                                                     SHARES     ------------------------
                                                                                   BENEFICIALLY   BEFORE        AFTER
NAME OF BENEFICIAL OWNER                                                            OWNED(1)     OFFERING     OFFERING
- ---------------------------------------------------------------------------------  -----------  -----------  -----------
<S>                                                                                <C>          <C>          <C>
St. Jude Medical, Inc.(2)........................................................   2,181,818         16.4%        13.4%
  One Lillehei Plaza
  St. Paul, MN 55117-9983
 
Vista III, L.P.(3)...............................................................   1,573,204         11.8%         9.6%
  36 Grove Street
  New Canaan, CT 06840
 
The Clark Estates(4).............................................................   1,226,208          9.2%         7.5%
  30 Wall Street
  New York, NY 10005
 
Reese S. Terry, Jr.(5)...........................................................     978,625          7.3%         6.0%
  c/o Cyberonics, Inc.
  17448 Highway 3, Suite 100
  Webster, TX 77598-4135
 
SmallCap World Fund Inc..........................................................     864,800          6.5%         5.3%
  c/o Capital Research and Management
  333 South Hope Street
  Los Angeles, CA 90071
 
Wisconsin Investment Board.......................................................     718,000          5.4%         4.4%
  P.O. Box 7842
  Madison, WI 53707
 
Robert P. Cummins(6).............................................................     328,500          2.4%         2.0%
 
John K. Bakewell(7)..............................................................     139,130          1.0%       *
 
William H. Duffell(8)............................................................     132,692          1.0%       *
 
Shawn P. Lunney(9)...............................................................     105,471        *            *
 
Thomas A. Duerden, Ph.D.(10).....................................................      51,000        *            *
 
Stanley H. Appel, M.D.(11).......................................................      82,500        *            *
 
Tony Coelho(12)..................................................................      31,833        *            *
 
Michael J. Strauss(13)...........................................................       8,750        *            *
 
All executive officers and directors as a group (11 persons)(14).................   2,115,886         14.7%        12.2%
</TABLE>
 
- ------------------------
 
  * Less than 1%
 
                                       39
<PAGE>
 (1) Beneficial ownership is determined in accordance with the rules of the
    Securities and Exchange Commission (the "Commission") and generally includes
    voting or investment power with respect to securities. Shares of Cyberonics
    Common Stock subject to options and warrants currently exercisable, or
    exercisable within 60 days, are deemed outstanding for computing the
    percentage of the person holding such options but are not deemed outstanding
    for computing the percentage of any other person. Except as indicated by
    footnote, and subject to community property laws where applicable, the
    persons named in the table have sole voting and investment power with
    respect to all shares of Cyberonics Common Stock shown as beneficially owned
    by them.
 
 (2) St. Jude acquired these shares pursuant a Common Stock Purchase Agreement
    dated April 8, 1996, which acquisition closed in July 1996. On April 8,1996,
    the Company and St. Jude also entered into an Agreement and Plan of Merger,
    pursuant to which the Company granted to St. Jude the right, but not the
    obligation, to acquire the Company on or before October 18, 1996 in the form
    of a merger. On October 18, 1996, St. Jude's right to acquire the Company
    expired unexercised. In connection with the Stock Purchase Agreement, St.
    Jude also entered into a Stockholders' Agreement which provides, among other
    things, that St. Jude will not acquire additional shares of Common Stock. In
    addition, St. Jude has agreed that, through July 1, 1998, it will vote its
    shares of Common Stock in favor of director nominees as recommended by the
    Board of Directors and, for so long as it holds any Common Stock, to vote
    its shares of Common Stock on all other matters submitted to the
    stockholders for a vote as recommended by the Board of Directors or in the
    same proportion as the votes cast by all other stockholders. Finally, St.
    Jude has agreed with the Company not to sell or otherwise dispose of its
    shares of Common Stock on or before March 31, 1998.
 
 (3) Mr. Cummins, the Chief Executive Officer, President and a director of
    Cyberonics, is a limited partner of the partnership that controls Vista III,
    L.P.
 
 (4) Pursuant to a letter agreement dated March 28, 1997, the Clark Estates is
    entitled to designate one person to serve on the Company's Board of
    Directors for as long as the Clark Estates retains at least 600,000 of the
    aggregate of 901,408 shares of Common Stock purchased on such date by
    parties affiliated with the Clark Estates. To date, the Clark Estates has
    not exercised this right.
 
 (5) Includes 148,500 shares held in trusts for the benefit of Mr. Terry's
    children of which Mr. Terry serves as trustee. Also includes 42,625 shares
    subject to options exercisable on or before November 30, 1997.
 
 (6) Includes 5,000 shares held in trust for the benefit of Mr. Cummins'
    daughter of which Mr. Cummins serves as trustee. Also includes 283,000
    shares subject to options exercisable on or before November 30, 1997.
    Excludes shares held by Vista III, L.P. as to which Mr. Cummins disclaims
    beneficial ownership except to the extent of his pecuniary interest therein.
 
 (7) Includes 138,000 shares subject to options exercisable on or before
    November 30, 1997.
 
 (8) Includes 122,500 shares subject to options exercisable on or before
    November 30, 1997.
 
 (9) Includes 98,346 shares subject to options exercisable on or before November
    30, 1997.
 
(10) Includes 27,500 shares subject to options exercisable on or before November
    30, 1997.
 
(11) Includes 42,500 shares subject to options exercisable on or before November
    30, 1997.
 
(12) Includes 31,833 shares subject to options exercisable on or before November
    30, 1997.
 
(13) Includes 8,750 shares subject to options exercisable on or before November
    30, 1997.
 
(14) Includes 1,049,971 shares subject to options held by executive officers and
    directors, which options are exercisable on or before November 30, 1997.
    Also includes shares which may be determined to be beneficially owned by
    executive officers and directors. See Notes 5 through 13.
 
                                       40
<PAGE>
                                  UNDERWRITING
 
    Montgomery Securities and Piper Jaffray Inc. (the "Underwriters") have
agreed, subject to the terms and conditions contained in the Underwriting
Agreement (the "Underwriting Agreement") by and among the Company and the
Underwriters, to purchase from the Company the number of shares of Common Stock
as indicated below opposite their respective names at the public offering price
less the underwriting discount set forth on the cover page of this Prospectus.
The Underwriting Agreement provides that the obligations of the Underwriters are
subject to certain conditions precedent and that the Underwriters are committed
to purchase all of such shares of Common Stock if any are purchased.
 
<TABLE>
<CAPTION>
                                                                                   NUMBER OF
UNDERWRITERS                                                                         SHARES
- ---------------------------------------------------------------------------------  ----------
<S>                                                                                <C>
Montgomery Securities............................................................
Piper Jaffray Inc................................................................
                                                                                   ----------
    Total........................................................................   3,000,000
                                                                                   ----------
                                                                                   ----------
</TABLE>
 
    The Underwriters have advised the Company that they propose initially to
offer the Common Stock to the public on the terms set forth on the cover page of
this Prospectus. The Underwriters may allow to selected dealers a concession of
not more than $    per share, and the Underwriters may allow, and such dealers
may reallow, a concession of not more than $    per share to certain other
dealers. After the public offering, the offering price and other selling terms
may be changed by the Underwriters. The Common Stock is offered subject to
receipt and acceptance by the Underwriters, and to certain other conditions,
including the right to reject orders in whole or in part.
 
    The Company has granted an option to the Underwriters, exercisable during
the 30-day period after the date of this Prospectus, to purchase up to a maximum
of 450,000 additional shares of Common Stock to cover over-allotments, if any,
at the same price per share as the initial 3,000,000 shares to be purchased by
the Underwriters. To the extent that the Underwriters exercise this option, the
Underwriters will be committed, subject to certain conditions, to purchase such
additional shares in approximately the same proportion as set forth in the above
table. The Underwriters may purchase such shares only to cover over-allotments
made in connection with this offering.
 
    The Underwriting Agreement provides that the Company will indemnify the
Underwriters against certain liabilities, including civil liabilities under the
Securities Act, or will contribute to payments the Underwriters may be required
to make in respect thereof.
 
    Each individual executive officer and director and certain stockholders of
the Company has agreed that, subject to certain exceptions, for a period of 90
days after the date of this Prospectus, he or she will not, without the prior
written consent of Montgomery Securities, directly or indirectly, sell, offer,
contract or grant any option to sell, pledge, transfer, establish an open "put
equivalent position" or otherwise dispose of any shares of Common Stock or
options or warrants to acquire shares of Common Stock of the Company. In
addition, the Company has agreed that, subject to certain exceptions, for a
period of 90 days after the date of this Prospectus, it will not, without the
prior written consent of Montgomery Securities, directly or indirectly issue,
offer to sell, sell, distribute or otherwise dispose of any shares of its Common
Stock or securities convertible into or exchangeable for its Common Stock or
other equity security.
 
    Until the distribution of the Common Stock is completed, rules of the
Securities and Exchange Commission may limit the ability of the Underwriters and
certain selling group members to bid for and purchase the Common Stock. As an
exception to these rules, the Underwriters are permitted to engage in certain
transactions that stabilize the price of the Common Stock. Such transactions
consist of bids or purchases for the purpose of pegging, fixing or maintaining
the price of the Common Stock. If the Underwriters create a short position in
the Common Stock in connection with the offering, i.e., if they sell more shares
of Common Stock than are set forth on the cover page of this Prospectus, the
Underwriters may reduce that short position by purchasing Common Stock in the
open market. The Underwriters may
 
                                       41
<PAGE>
also elect to reduce any short position by exercising all or part of the
over-allotment option described above. The Underwriters may also impose a
penalty bid on certain Underwriters and selling group members. This means that
if the Underwriters purchase shares of Common Stock in the open market to reduce
the Underwriters' short position or to stabilize the price of the Common Stock,
they may reclaim the amount of the selling concession from the Underwriters and
selling group members who sold those shares as part of the offering.
 
    In general, purchases of a security for the purpose of stabilization or to
reduce a short position could cause the price of the security to be higher than
it might be in the absence of such purchases. The imposition of a penalty bid
might also effect on the price of a security to the extent that it discourages
resales of the security. Neither the Company nor any of the Underwriters makes
any representation or predictions as to the direction or magnitude of any effect
that the transactions described above may have on the price of the Common Stock.
In addition, neither the Company nor any of the Underwriters makes any
representation that the Underwriters will engage in such transactions or that
such transactions, once commenced, will not be discontinued without notice.
 
    The Underwriters have advised the Company that the Underwriters and selling
group members (if any) or their respective affiliates may engage in passive
market making transactions in the Common Stock in accordance with rules
promulgated by the Commission. In general, a passive market maker may not bid
for or purchase the Common Stock at a price that exceeds the highest independent
bid. In addition, the net daily purchases made by any passive market maker
generally may not exceed 30% of its average daily trading volume in the Common
Stock during a specified two-month prior period or 200 shares, whichever is
greater. A passive market maker must identify passive market making bids as such
on the Nasdaq electronic inter-dealer reporting system. Passive market making
may have the effect of stabilizing or maintaining the market price of the Common
Stock at a level above that which might otherwise prevail in the open market.
Underwriters and selling group members (if any) are not required to engage in
passive market making and may discontinue such activities at any time.
 
                                 LEGAL MATTERS
 
    The validity of the issuance of the Common Stock offered hereby will be
passed upon for the Company by Wilson Sonsini Goodrich & Rosati, Professional
Corporation, Palo Alto, California, counsel for the Company. Certain members of
Wilson Sonsini Goodrich & Rosati own an aggregate of 2,000 shares of the
Company's Common Stock. Pillsbury Madison & Sutro LLP, San Francisco,
California, is acting as counsel for the Underwriters in connection with certain
legal matters related to the Common Stock offered hereby.
 
                                    EXPERTS
 
    The consolidated financial statements of the Company as of June 30, 1996 and
1997, and for each of the three fiscal years in the period ended June 30, 1997
appearing elsewhere in this Prospectus have been audited by Arthur Andersen LLP,
independent public accountants, as indicated in their report with respect
thereto, and are included herein in reliance upon the authority of said firm as
experts in giving said report.
 
                             ADDITIONAL INFORMATION
 
    The Company is subject to the information requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and in accordance
therewith files reports and other information with the Commission. Such reports,
proxy statements and other information may be inspected and copied at the public
reference facilities of the Commission at Room 1024, Judiciary Plaza, 450 Fifth
Street, N.W., Washington, D.C. 20549, and at the following regional offices of
the Commission: 7 World Trade Center, Suite 1300, New York, New York 10048 and
Suite 1400, Citicorp Center, 500 West Madison Street, Chicago, Illinois 60661.
Copies of such material can be obtained from the Public Reference Section of the
 
                                       42
<PAGE>
Commission, 450 Fifth Street, N.W., Washington, D.C. 20549, at prescribed rates.
The Commission also maintains a World Wide Web site (http://www.sec.gov) that
contains reports, proxy and information statements and other information
regarding registrants that file electronically with the Commission.
 
    This Prospectus constitutes a part of a Registration Statement on Form S-3
filed by the Company with the Commission under the Securities Act. This
Prospectus omits certain of the information contained in the Registration
Statement, and reference is hereby made to the Registration Statement and
related exhibits for further information with respect to the Company and the
securities offered hereby. Any statements contained herein concerning the
provisions of any document are not necessarily complete, and, in such instance,
reference is made to the copy of such document filed as an exhibit to the
Registration Statement or otherwise filed with the Commission. Each such
statement is qualified in its entirety by such reference.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
    The following documents, filed or to be filed with the Commission
(Commission File No. 0-19806) under the Exchange Act, are hereby incorporated by
reference into this Prospectus: (a) the Company's Annual Report on Form 10-K for
the fiscal year ended June 30, 1997; and (b) the description of the Company's
Common Stock and Preferred Share Purchase Rights set forth in its Registration
Statement on Form 8-A filed with the Commission on February 10, 1993 and its
Registration Statement on Form 8-A12G filed with the Commission on March 6,
1997.
 
    Additionally, all documents filed by the Company with the Commission
pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to
the date of the initial Registration Statement and prior to effectiveness of the
registration statement and subsequent to the date of this Prospectus and prior
to the termination of the offering made hereby shall be deemed to be
incorporated by reference in this Prospectus and to be a part hereof from the
date of filing of such documents. Any statement or information contained in a
document incorporated by reference herein shall be deemed to be modified or
superseded for purposes of this Prospectus to the extent that a statement of
information contained herein modifies or replaces such a statement or such
information. Any such statement or information so modified or replaced shall not
be deemed, except as so modified or replaced, to constitute a part of this
Prospectus. Such incorporation by reference shall not be deemed specifically to
incorporate by reference the information referred to in Item 402(a)(8) of
Regulation S-K under the Securities Act.
 
    The Company will furnish without charge to each person, including any
beneficial owner, to whom this Prospectus is delivered, upon written or oral
request, a copy of any and all of the information that has been incorporated by
reference in this Prospectus, other than exhibits to such information, unless
such exhibits are specifically incorporated by reference into the information
that this Prospectus incorporates. Requests should be submitted by telephone to
(281) 332-1375 or in writing to Cyberonics, Inc., 17448 Highway 3, Suite 100,
Webster, Texas 77598-4135, Attn: John K. Bakewell, Vice President, Finance and
Administration and Chief Financial Officer.
 
                                       43
<PAGE>
                                CYBERONICS, INC.
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
                                                                                                                PAGE
                                                                                                                -----
<S>                                                                                                          <C>
Report of Independent Public Accountants...................................................................         F-2
 
Consolidated Balance Sheets as of June 30, 1997 and 1996...................................................         F-3
 
Consolidated Statements of Operations for the years ended June 30, 1997, 1996 and 1995.....................         F-4
 
Consolidated Statements of Stockholders' Equity for the years ended June 30, 1997, 1996 and 1995...........         F-5
 
Consolidated Statements of Cash Flows for the years ended June 30, 1997, 1996 and 1995.....................         F-6
 
Notes to Consolidated Financial Statements.................................................................         F-7
</TABLE>
 
                                      F-1
<PAGE>
                    REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
To Cyberonics, Inc.:
 
    We have audited the accompanying consolidated balance sheets of Cyberonics,
Inc. (a Delaware corporation), and subsidiary as of June 30, 1997 and 1996, and
the related consolidated statements of operations, stockholders' equity and cash
flows for each of the three years in the period ended June 30, 1997. These
financial statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
    We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the 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. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
    In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the financial position of Cyberonics,
Inc., and subsidiary as of June 30, 1997 and 1996, and the results of their
operations and their cash flows for each of the three years in the period ended
June 30, 1997, in conformity with generally accepted accounting principles.
 
/s/ ARTHUR ANDERSEN LLP
 
Houston, Texas
August 7, 1997
 
                                      F-2
<PAGE>
                                CYBERONICS, INC.
                          CONSOLIDATED BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                                               JUNE 30,
                                                                                     -----------------------------
                                                                                         1997            1996
                                                                                     -------------  --------------
<S>                                                                                  <C>            <C>
                                      ASSETS
CURRENT ASSETS:
  Cash and cash equivalents........................................................  $     781,639  $    2,121,930
  Securities held to maturity......................................................      7,129,409        --
  Accounts receivable, net.........................................................        548,542         473,038
  Inventories......................................................................      1,005,356         671,836
  Prepaid expenses.................................................................        126,799         258,585
                                                                                     -------------  --------------
    TOTAL CURRENT ASSETS...........................................................      9,591,745       3,525,389
Securities held to maturity........................................................        212,408          80,032
Property and equipment, net........................................................        362,333         332,881
Other assets, net..................................................................         83,251           9,741
                                                                                     -------------  --------------
                                                                                     $  10,249,737  $    3,948,043
                                                                                     -------------  --------------
                                                                                     -------------  --------------
                       LIABILITIES AND STOCKHOLDERS' EQUITY
 
CURRENT LIABILITIES:
  Accounts payable.................................................................  $     365,351  $      924,059
  Accrued liabilities..............................................................      1,462,914       1,558,934
                                                                                     -------------  --------------
    TOTAL CURRENT LIABILITIES......................................................      1,828,265       2,482,993
 
Commitments and Contingencies
 
STOCKHOLDERS' EQUITY:
  Preferred Stock, $.01 par value per share; 2,500,000 shares authorized; no shares
    issued and outstanding.........................................................       --              --
  Common Stock, $.01 par value per share; 25,000,000 shares authorized; 13,322,175
    and 9,577,115 shares issued and outstanding at June 30, 1997 and 1996,
    respectively...................................................................        133,222          95,771
  Additional paid-in capital.......................................................     57,338,856      39,261,602
  Deferred compensation............................................................        (63,750)         (4,460)
  Accumulated deficit..............................................................    (49,167,002)    (37,922,171)
  Cumulative translation adjustment................................................        180,146          34,308
                                                                                     -------------  --------------
    TOTAL STOCKHOLDERS' EQUITY.....................................................      8,421,472       1,465,050
                                                                                     -------------  --------------
                                                                                     $  10,249,737  $    3,948,043
                                                                                     -------------  --------------
                                                                                     -------------  --------------
</TABLE>
 
                 SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS
 
                                      F-3
<PAGE>
                                CYBERONICS, INC.
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                                                 YEAR ENDED JUNE 30,
                                                                    ---------------------------------------------
                                                                         1997            1996           1995
                                                                    --------------  --------------  -------------
<S>                                                                 <C>             <C>             <C>
Net sales.........................................................  $    1,372,005  $    1,416,965  $     966,989
Cost of sales.....................................................         372,180         411,562        347,457
                                                                    --------------  --------------  -------------
      GROSS PROFIT................................................         999,825       1,005,403        619,532
Operating Expenses:
  Research and development........................................       6,549,474       8,024,502      5,678,024
  Selling, general and administrative.............................       5,933,852       3,420,111      2,906,589
                                                                    --------------  --------------  -------------
    Total operating expenses......................................      12,483,326      11,444,613      8,584,613
                                                                    --------------  --------------  -------------
      LOSS FROM OPERATIONS........................................     (11,483,501)    (10,439,210)    (7,965,081)
Interest income, net..............................................         436,813         423,044        688,909
Other (expense) income, net.......................................        (198,143)        (97,084)        37,362
                                                                    --------------  --------------  -------------
      NET LOSS....................................................  $  (11,244,831) $  (10,113,250) $  (7,238,810)
                                                                    --------------  --------------  -------------
                                                                    --------------  --------------  -------------
      NET LOSS PER SHARE..........................................  $         (.93) $        (1.06) $        (.79)
                                                                    --------------  --------------  -------------
                                                                    --------------  --------------  -------------
      SHARES USED IN COMPUTING NET LOSS PER SHARE.................      12,030,171       9,513,038      9,218,008
                                                                    --------------  --------------  -------------
                                                                    --------------  --------------  -------------
</TABLE>
 
                 SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS
 
                                      F-4
<PAGE>
                                CYBERONICS, INC.
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
 
<TABLE>
<CAPTION>
                                                  COMMON STOCK       ADDITIONAL                               CUMULATIVE
                                              ---------------------   PAID-IN      DEFERRED     ACCUMULATED   TRANSLATION
                                                SHARES     AMOUNT     CAPITAL    COMPENSATION     DEFICIT     ADJUSTMENT
                                              ----------  ---------  ----------  -------------  ------------  -----------
<S>                                           <C>         <C>        <C>         <C>            <C>           <C>
Balance at June 30, 1994....................   9,051,054  $  90,511  $39,205,998   $(223,000)   ($20,570,111)  $  --
Stock options exercised.....................     415,616      4,156      27,775       --             --           --
Issuance of Common Stock under Employee
  Stock Purchase Plan.......................      32,391        324      94,485       --             --           --
Issuance of Common Stock under Employee
  Special Recognition Stock Program.........         200          2         748       --             --           --
Amortization of deferred compensation.......      --         --          --           91,200         --           --
Translation adjustment......................      --         --          --           --             --          (39,723)
Net loss....................................      --         --          --           --         (7,238,810)      --
                                              ----------  ---------  ----------  -------------  ------------  -----------
Balance at June 30, 1995....................   9,499,261     94,993  39,329,006     (131,800)   (27,808,921)     (39,723)
Stock options exercised.....................      63,849        638      44,875       --             --           --
Issuance of Common Stock under Employee
  Stock Purchase Plan.......................      14,005        140      54,485       --             --           --
Effect of employee terminations on deferred
  compensation and related balances.........      --         --        (166,764)      56,264         --           --
Amortization of deferred compensation.......      --         --          --           71,076         --           --
Translation adjustment......................      --         --          --           --             --           74,031
Net loss....................................      --         --          --           --        (10,113,250)      --
                                              ----------  ---------  ----------  -------------  ------------  -----------
Balance at June 30, 1996....................   9,577,115     95,771  39,261,602       (4,460)   (37,922,171)      34,308
Issuance of Common Stock in corporate
  relationship..............................   2,181,818     21,818  11,154,663       --             --           --
Issuance of Common Stock in private
  placement.................................   1,534,374     15,344   6,768,599       --             --           --
Stock options exercised.....................      10,734        108      13,914       --             --           --
Issuance of Common Stock under Employee
  Stock Purchase Plan.......................      18,134        181      47,423       --             --           --
Deferred compensation relating to issuance
  of certain stock options..................      --         --          76,500      (76,500)        --           --
Amortization of deferred compensation and
  expenses related to certain stock
  options...................................      --         --          16,155       17,210         --           --
Translation adjustment......................      --         --          --           --             --          145,838
Net loss....................................      --         --          --           --        (11,244,831)      --
                                              ----------  ---------  ----------  -------------  ------------  -----------
Balance at June 30, 1997....................  13,322,175  $ 133,222  $57,338,856   $ (63,750)   ($49,167,002)  $ 180,146
                                              ----------  ---------  ----------  -------------  ------------  -----------
                                              ----------  ---------  ----------  -------------  ------------  -----------
</TABLE>
 
                 SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS
 
                                      F-5
<PAGE>
                                CYBERONICS, INC.
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                                 YEAR ENDED JUNE 30,
                                                                    ---------------------------------------------
                                                                         1997            1996           1995
                                                                    --------------  --------------  -------------
<S>                                                                 <C>             <C>             <C>
CASH FLOW FROM OPERATING ACTIVITIES:
  Net loss........................................................  $  (11,244,831) $  (10,113,250) $  (7,238,810)
  Noncash items included in net loss:
    Depreciation..................................................         253,615         273,905        329,738
    Compensation expense (income) related to certain stock
      options.....................................................          33,365         (39,424)        91,200
    Issuance of Common Stock under Employee Stock Recognition
      Program.....................................................        --              --                  750
  Change in operating assets and liabilities:
    Accounts receivable...........................................         (75,504)       (133,380)      (265,627)
    Inventories...................................................        (333,520)        (66,280)      (180,257)
    Prepaid expenses..............................................         131,786           8,721        (47,693)
    Accounts payable and accrued liabilities......................        (654,728)        427,581        983,685
  Other...........................................................         (73,510)          3,738          4,356
                                                                    --------------  --------------  -------------
      NET CASH USED IN OPERATING ACTIVITIES.......................     (11,963,327)     (9,638,389)    (6,322,658)
CASH FLOW FROM INVESTING ACTIVITIES:
  Purchases of property and equipment.............................        (283,067)       (124,811)      (260,497)
  Purchases of marketable securities..............................     (11,614,676)     (3,181,598)    (8,050,344)
  Maturities of marketable securities.............................       4,352,891       6,091,192     18,920,809
                                                                    --------------  --------------  -------------
      NET CASH (USED IN) PROVIDED BY
        INVESTING ACTIVITIES......................................      (7,544,852)      2,784,783     10,609,968
CASH FLOW FROM FINANCING ACTIVITIES:
  Proceeds from issuance of Common Stock..........................      18,022,050         100,138        126,740
  Payments of capital lease obligations...........................        --               (61,626)      (119,397)
                                                                    --------------  --------------  -------------
      Net Cash Provided By Financing Activities...................      18,022,050          38,512          7,343
                                                                    --------------  --------------  -------------
  Effect of exchange rate changes on cash and cash equivalents....         145,838          74,031        (39,723)
                                                                    --------------  --------------  -------------
      NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS........      (1,340,291)     (6,741,063)     4,254,930
Cash and cash equivalents at beginning of year....................       2,121,930       8,862,993      4,608,063
                                                                    --------------  --------------  -------------
Cash and cash equivalents at end of year..........................  $      781,639  $    2,121,930  $   8,862,993
                                                                    --------------  --------------  -------------
                                                                    --------------  --------------  -------------
</TABLE>
 
    INTEREST PAYMENTS TOTALED $14,953 AND $13,348 DURING THE YEARS ENDED JUNE
30, 1996 AND 1995, RESPECTIVELY.
 
    INVESTING AND FINANCING ACTIVITIES NOT RESULTING IN CASH RECEIPTS OR
PAYMENTS CONSIST OF THE DEFERRAL OF $76,500 OF COMPENSATION COSTS INCURRED IN
THE ISSUANCE OF CERTAIN STOCK OPTIONS DURING THE YEAR ENDED JUNE 30, 1997, AND
RECLASSIFICATIONS OF $56,264 OF DEFERRED COMPENSATION TO ADDITIONAL PAID-IN
CAPITAL DURING THE YEAR ENDED JUNE 30, 1996.
 
                 SEE ACCOMPANYING NOTES TO FINANCIAL STATEMENTS
 
                                      F-6
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                 JUNE 30, 1997
 
NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RELATED DATA
 
    NATURE OF OPERATIONS.  Cyberonics, Inc. ("Cyberonics" or the "Company"),
designs, develops, manufactures and markets medical devices which deliver a
novel therapy, vagus nerve stimulation (VNS-TM-), for the treatment of epilepsy
and other debilitating neurological disorders. In July 1997, Cyberonics' sole
product, its proprietary implantable device, the NCP-Registered Trademark-
System, was approved by the United States Food and Drug Administration ("FDA")
for commercial distribution in the United States, where the Company intends to
market it using its own employee-based direct sales organization. In addition,
the NCP System is marketed internationally (principally in Europe) using a
combination of the Company's own direct sales organization and independent
distributors. Cyberonics is headquartered in Webster, Texas.
 
    The Company's future success is dependent upon a number of factors which
include, among others, obtaining and maintaining regulatory and reimbursement
approvals for its products, achieving market acceptance and generating
sufficient sales volume, the possibility of competition and technological
changes, developing its sales and marketing infrastructures, maintaining an
uninterrupted supply of certain sole source components and materials, adding
sufficient manufacturing capacity to meet future possible product demand,
possible product liability or recall, and reliance on key personnel.
Additionally, in order for the Company to execute its intended business plan,
which includes the commercial launch of the NCP System in the United States and
the continued development of the Company's international marketplace, the
Company will require additional financing. The Company intends to seek to raise
such financing in fiscal 1998 in an amount sufficient to fund its intended
business plan and the related operating expense levels that are expected to be
significantly higher than those incurred during the year ended June 30, 1997. If
the Company is unable to raise sufficient financing in fiscal 1998, operating
activities will require extensive reductions and, in certain cases, elimination
to enable the Company's present levels of cash and investments to provide
sufficient liquidity to fund the Company into fiscal 1999.
 
    CONSOLIDATION.  The accompanying consolidated financial statements include
the Company and its wholly-owned subsidiary, Cyberonics Europe, S.A. All
significant intercompany accounts and transactions have been eliminated.
 
    USE OF ESTIMATES.  The preparation of the financial statements in conformity
with generally accepted accounting principles requires management to make
estimates and assumptions that affect the amounts reported in the financial
statements and accompanying notes. Actual results could differ from those
estimates.
 
    FOREIGN CURRENCY TRANSLATION.  The assets and liabilities of Cyberonics
Europe S.A. are generally translated into U.S. dollars at exchange rates in
effect on reporting dates, while capital accounts and certain obligations of a
long-term nature payable to the parent company are translated at historical
rates. Income statement items are translated at average exchange rates in effect
during the financial statement period. Gains and losses resulting from foreign
currency transactions denominated in currency other than the functional currency
are included in other income and expense.
 
    CASH AND CASH EQUIVALENTS.  The Company considers all highly liquid
investments with a maturity of three months or less at the time of purchase to
be cash equivalents.
 
    MARKETABLE SECURITIES.  At June 30, 1997 and 1996, the Company's investment
portfolios consisted of securities held to maturity that are reported at
amortized cost. Securities held to maturity are primarily
 
                                      F-7
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RELATED DATA (CONTINUED)
corporate bonds, international treasury obligations and asset-backed investments
with various maturity dates ranging up to approximately 18 months and have a
fair market value of $7,382,721 and $79,442, respectively. At June 30, 1997 and
1996, the Company's investment portfolio consists of the following:
 
<TABLE>
<CAPTION>
                                                                     1997                      1996
                                                          --------------------------  ----------------------
                                                          FAIR MARKET     CARRYING    FAIR MARKET  CARRYING
                                                             VALUE         VALUE         VALUE       VALUE
                                                          ------------  ------------  -----------  ---------
<S>                                                       <C>           <C>           <C>          <C>
Securities held to maturity--
  Current--
    Corporate bonds.....................................  $  6,668,976  $  6,636,281   $  --       $  --
    International treasury obligations..................       500,000       493,128      --          --
                                                          ------------  ------------  -----------  ---------
                                                             7,168,976     7,129,409      --          --
  Noncurrent--
    Corporate bonds.....................................       213,745       212,408      62,384      62,931
    Collateralized mortgage obligations.................       --            --           17,058      17,101
                                                          ------------  ------------  -----------  ---------
                                                               213,745       212,408      79,442      80,032
                                                          ------------  ------------  -----------  ---------
      Total.............................................  $  7,382,721  $  7,341,817   $  79,442   $  80,032
                                                          ------------  ------------  -----------  ---------
                                                          ------------  ------------  -----------  ---------
</TABLE>
 
    INVENTORIES.  Cyberonics states its inventories at the lower of cost,
first-in, first-out (FIFO) method, or market. Cost includes the acquisition cost
of raw materials and components, direct labor and overhead.
 
    PROPERTY AND EQUIPMENT.  Property and equipment are carried at cost, less
accumulated depreciation. Maintenance, repairs and minor replacements are
charged to expense as incurred; significant renewals and betterments are
capitalized. For financial reporting purposes, the Company computes depreciation
using the double declining balance method over useful lives ranging from three
to seven years.
 
    STOCK OPTIONS.  In October 1995, the Financial Accounting Standards Board
issued Statement No. 123, "Accounting for Stock-Based Compensation," which
allows the Company to adopt one of two methods for accounting for stock options.
The Company has elected the method that requires disclosure of stock-based
compensation. Because of this election, the Company continues to account for its
employee stock-based compensation plans under Accounting Principles Board (APB)
Opinion No. 25 and the related interpretations. Accordingly, deferred
compensation is recorded for stock-based compensation grants based on the excess
of the market value of the common stock on the measurement date over the
exercise price. The deferred compensation is amortized over the vesting period
of each unit of stock-based compensation. If the exercise price of the
stock-based compensation grant is equal to the market price of the Company's
stock on the date of grant, no compensation expense is recorded.
 
    REVENUE RECOGNITION.  Revenue from product sales is generally recognized
upon shipment to the customer. Domestic sales activities prior to the Company's
July 1997 receipt of FDA approval have depended entirely upon the Company
conducting clinical trial activities under arrangements with certain
investigational centers, some of which employed risk-sharing provisions.
Domestic sales made under such risk-sharing arrangements were deferred until
Cyberonics received payment from the centers and the centers in turn received
third-party reimbursement or satisfied other terms set forth in their respective
arrangements. During fiscal year 1997, one customer represented approximately 13
percent of net sales.
 
                                      F-8
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RELATED DATA (CONTINUED)
    ACCOUNTS RECEIVABLE.  During fiscal year 1997, the Company recorded an
allowance for doubtful accounts of $58,826, and no write-offs have been charged
against the allowance through June 30, 1997.
 
    RESEARCH AND DEVELOPMENT.  All research and development costs are expensed
as incurred.
 
    WARRANTY EXPENSE.  The Company provides at the time of shipment for the
estimated costs which may be incurred under its product warranties.
 
    LICENSE AGREEMENTS.  The Company has executed licensing agreements under
which it has secured the rights provided under certain patents. License fees and
royalties, payable under the terms of these agreements, are expensed as
incurred.
 
    INCOME TAXES.  Cyberonics accounts for income taxes in accordance with the
liability method prescribed by Financial Accounting Standards Board Statement of
Financial Accounting Standards (SFAS) No. 109, "Accounting for Income Taxes."
Under this method, deferred income taxes reflect the impact of temporary
differences between financial accounting and tax bases of assets and
liabilities. Such differences relate primarily to the Company's election to
defer the deduction of certain start-up costs for federal income tax purposes,
the deductibility of certain accruals and reserves and the effect of tax loss
and tax credit carryforwards not yet utilized. Deferred tax assets are evaluated
for realization based on a more-likely-than-not criteria in determining if a
valuation allowance should be provided.
 
    NET LOSS PER SHARE.  The Company's net loss per share is based on the
weighted average number of common shares outstanding. Common equivalent shares,
consisting of the effect of stock options and warrants, are excluded from the
per share calculations, as the effect of their inclusion is antidilutive. In
March 1997, the Financial Accounting Standards Board issued SFAS No. 128,
"Earnings Per Share." For periods ending after December 15, 1997, Cyberonics
will adopt the provisions of the new statement and the Company will
retroactively revise the presentation of net loss per share in historical
financial statements to present both basic and diluted net loss per share as
required by SFAS No. 128. The Company's net loss per share presented in the
accompanying financial statements, as calculated under the provisions of APB
Opinion No. 15, are the same as those had basic net loss per share under SFAS
No. 128 been presented. Additionally, net loss per share as presented herein is
also the same as those had diluted net loss per share under the provisions of
SFAS No. 128 been presented, since the Company's outstanding stock options and
warrants would not have been included in the calculation because their effect
would have been antidilutive.
 
NOTE 2. INVENTORIES
 
Inventories consist of the following:
 
<TABLE>
<CAPTION>
                                                                              JUNE 30,
                                                                      ------------------------
                                                                          1997         1996
                                                                      ------------  ----------
<S>                                                                   <C>           <C>
Raw materials and components........................................  $    454,122  $  307,707
Work-in-process.....................................................       206,282     227,821
Finished goods......................................................       344,952     136,308
                                                                      ------------  ----------
                                                                      $  1,005,356  $  671,836
                                                                      ------------  ----------
                                                                      ------------  ----------
</TABLE>
 
                                      F-9
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                 JUNE 30, 1997
 
NOTE 3. PROPERTY AND EQUIPMENT
 
Property and equipment consist of the following:
 
<TABLE>
<CAPTION>
                                                                             JUNE 30,
                                                                     ------------------------
                                                                        1997         1996
                                                                     -----------  -----------
<S>                                                                  <C>          <C>
Furniture and fixtures.............................................  $   357,510  $   232,704
Office equipment...................................................       64,223       59,633
Computer equipment.................................................      730,085      612,113
Research and development equipment.................................      115,898      109,959
Manufacturing equipment............................................      515,950      501,309
Leasehold improvements.............................................      243,123      243,123
                                                                     -----------  -----------
                                                                       2,026,789    1,758,841
Accumulated depreciation...........................................   (1,664,456)  (1,425,960)
                                                                     -----------  -----------
                                                                     $   362,333  $   332,881
                                                                     -----------  -----------
                                                                     -----------  -----------
</TABLE>
 
NOTE 4. ACCRUED LIABILITIES
 
Accrued liabilities are as follows:
 
<TABLE>
<CAPTION>
                                                                             JUNE 30,
                                                                    --------------------------
                                                                        1997          1996
                                                                    ------------  ------------
<S>                                                                 <C>           <C>
Clinical costs....................................................  $    688,271  $    618,885
Warranties........................................................       231,808       167,778
Payroll and other compensation....................................       219,288       257,468
Professional services.............................................       114,800       209,540
Marketing activities..............................................        58,562       155,526
Royalties.........................................................        46,320        48,444
Customer deposits.................................................        18,364        48,916
Other.............................................................        85,501        52,377
                                                                    ------------  ------------
                                                                    $  1,462,914  $  1,558,934
                                                                    ------------  ------------
                                                                    ------------  ------------
</TABLE>
 
NOTE 5. STOCKHOLDERS' EQUITY
 
    PREFERRED STOCK.  The Company has 2,500,000 shares of undesignated Preferred
Stock authorized and available for future issuance, of which none have been
issued through June 30, 1997. With respect to the shares authorized, the
Company's Board of Directors, at its sole discretion, may determine, fix and
alter dividend rights, dividend rates, conversion rights, voting rights, terms
of redemption, redemption prices, liquidation preferences and the number of
shares constituting any such series, and may determine the designation, terms
and conditions of the issuance of any such shares.
 
    COMMON STOCK.  During the year ended June 30, 1995, stock option exercises
and issuances of Common Stock under the Company's Employee Stock Purchase Plan
and the Company's Employee Stock Recognition Program increased the number of
common shares by 415,616, 32,391 and 200, respectively. During the year ended
June 30, 1996, stock option exercises and issuances of Common Stock under the
Company's Employee Stock Purchase Plan increased the number of common shares by
63,849 and 14,005,
 
                                      F-10
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 5. STOCKHOLDERS' EQUITY (CONTINUED)
respectively. During the year ended June 30, 1997, stock option exercises and
issuances of Common Stock under the Company's Employee Stock Purchase Plan
increased the number of common shares by 10,734 and 18,134, respectively.
 
    In April 1996, Cyberonics and St. Jude Medical, Inc. ("St. Jude") entered
into an Agreement and Plan of Merger ("Merger Agreement") and a related Common
Stock Purchase Agreement (the "Stock Purchase Agreement"). Pursuant to the Stock
Purchase Agreement, in July 1996, Cyberonics sold to St. Jude 2,181,818 newly
issued shares of Cyberonics Common Stock at $5.50 per share, providing proceeds
to the Company of approximately $11,200,000 after offering costs. In October
1996, St. Jude's right, pursuant to the Merger Agreement, to acquire the
Company's remaining outstanding common shares for approximately $7.00 per share
expired unexercised.
 
    In March 1997, the Company completed a private equity financing, issuing
1,534,374 new shares of the Company's Common Stock in exchange for $4.44 per
share, providing additional proceeds to the Company of approximately $6,800,000
after offering costs.
 
    WARRANTS.  In connection with the execution of certain lease agreements,
Cyberonics granted warrants to a third-party leasing company to effectively
purchase up to 9,104 shares of the Company's Common Stock. Through June 30,
1997, the warrant holder has exercised its rights to purchase 7,534 shares,
netting 5,185 shares upon the execution of a cashless exercise. A warrant for
the purchase of 1,570 shares at an exercise price of $5.33 per common share was
outstanding at June 30, 1997, and was exercised in August 1997.
 
    PREFERRED SHARE PURCHASE RIGHTS.  In January 1997, the Company's Board of
Directors declared a dividend distribution of one Preferred Share Purchase Right
("Right") on each outstanding share of the Company's Common Stock to
stockholders of record on March 10, 1997. The Rights will become exercisable
following the tenth day after a person or group announces an acquisition of 20
percent or more of the Company's Common Stock or announces commencement of a
tender offer, the consummation of which would result in ownership by the persons
or group of 20 percent or more of the Common Stock. Each Right entitles
stockholders to buy 1/1000 of a share of the Company's Series A Participating
Preferred Stock at an exercise price of $30. The Company will be entitled to
redeem the Rights at $.01 per Right at any time on or before the tenth day
following acquisition by a person or group of 20 percent or more of the
Company's Common Stock. If, prior to redemption of the Rights, a person or group
acquires 20 percent or more of the Company's Common Stock, each Right not owned
by a holder of 20 percent or more of the Common Stock will entitle its holder to
purchase, at the Right's then current exchange price, that number of shares of
Common Stock of the Company (or, in certain circumstances as determined by the
Board, cash, other property or other securities) having a market value at that
time of twice the Right's exercise price. If, after the tenth day following
acquisition by a person or group of 20 percent or more of the Company's Common
Stock, the Company sells more than 50 percent of its assets or earning power or
is acquired in a merger or other business combination, the acquiring person must
assume the obligations under the Rights and the Rights will become exercisable
to acquire Common Stock of the acquiring person at the discounted price. At any
time after an event triggering exercisability of the Rights at a discounted
price and prior to the acquisition by the acquiring person of 50 percent or more
of the outstanding Common Stock, the Board of Directors of the Company may
exchange the Rights (other than those owned by the acquiring person or its
affiliates) for the Common Stock of the Company at an exchange ratio of one
share of Common Stock per Right.
 
                                      F-11
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 6. STOCK INCENTIVE AND PURCHASE PLANS
 
    STOCK OPTIONS.  Cyberonics has reserved an aggregate of 4,000,000 shares of
its Common Stock through June 30, 1997, for issuance pursuant to its Amended
1988 Incentive Stock Option Plan and its 1996 Stock Option Plan (the "Stock
Option Plans"). Options granted under the Stock Option Plans generally vest
ratably over four or five years following their date of grant. The vesting of
certain options occurs up to 10 years from the grant date but can accelerate
based upon the achievement of specific milestones related to regulatory
approvals and the achievement of Company sales objectives. In June 1997, 446,147
shares vested upon receipt of FDA panel recommendation, and in July 1997 an
additional 356,156 shares vested upon FDA approval. Options granted under the
Stock Option Plans have maximum terms of 10 years. The Amended 1988 Incentive
Stock Option Plan allows issuance of either nonstatutory or incentive stock
options, while the 1996 Stock Option Plan provides for issuance of nonstatutory
stock options exclusively.
 
    The following is a summary of the Company's stock option activity for the
three years ended June 30, 1997:
 
<TABLE>
<CAPTION>
                                                                          OUTSTANDING              EXERCISABLE
                                                                    -----------------------  -----------------------
                                                                                 WEIGHTED                 WEIGHTED
                                                                                  AVERAGE                  AVERAGE
                                                         SHARES                  EXERCISE                 EXERCISE
                                                        RESERVED      SHARES       PRICE       SHARES       PRICE
                                                       -----------  ----------  -----------  ----------  -----------
<S>                                                    <C>          <C>         <C>          <C>         <C>
Balance at June 30, 1994.............................      427,129     892,713       $2.39      486,185   $    1.26
  Shares reserved....................................      500,000
  Granted............................................     (613,800)    613,800        4.12
  Options becoming exercisable.......................                                           133,523
  Exercised..........................................                 (429,666)        .17     (429,666)
  Canceled or forfeited..............................      273,396    (273,396)       5.58
                                                       -----------  ----------               ----------
Balance at June 30, 1995.............................      586,725     803,451        3.82      190,042        2.94
  Granted............................................      (52,000)     52,000        4.77
  Options becoming exercisable.......................                                           167,412
  Exercised..........................................                  (63,849)        .71      (63,849)
  Canceled or forfeited..............................       72,050     (72,050)       3.38
                                                       -----------  ----------               ----------
Balance at June 30, 1996.............................      606,775     719,552        4.20      293,605        4.74
  Shares reserved....................................    2,000,000
  Granted............................................   (1,893,388)  1,893,388        3.11
  Options becoming exercisable.......................                                           762,269
  Exercised..........................................                  (10,734)       1.31      (10,734)
  Canceled or forfeited..............................      396,816    (396,816)       5.05
                                                       -----------  ----------               ----------
Balance at June 30, 1997.............................    1,110,203   2,205,390       $3.13    1,045,140  $     3.04
                                                       -----------  ----------               ----------
                                                       -----------  ----------               ----------
</TABLE>
 
                                      F-12
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 6. STOCK INCENTIVE AND PURCHASE PLANS (CONTINUED)
    For certain options granted, the Company recognizes as compensation expense
the excess of the deemed value for accounting purposes of the Common Stock on
the date the options were granted over the aggregate exercise price of such
options. This compensation expense is amortized ratably over the vesting period
of each option. The Company recognized compensation expense totaling $33,365
during fiscal 1997, $71,076 during fiscal 1996 and $91,200 during fiscal 1997.
The Company also recognized adjustments totaling $56,264 during fiscal 1996 to
reduce deferred compensation balances as a result of employee terminations.
 
    The fair values of each option grant and purchase plan discounts are
estimated using the Black-Scholes option pricing model with the following
weighted average assumptions used for grants in fiscal years 1997 and 1996:
risk-free interest rate of 7.2 percent, expected life of five years for options
and restricted stock, expected life of six months for purchase plan shares,
expected volatility of 78 percent and no expected dividend yields. The weighted
average fair value of options granted at prices equal to the Company's market
value in fiscal years 1997 and 1996 was $2.20 and $3.22, respectively, and was
$2.12 for options granted below the Company's market value during fiscal 1997.
 
    Had the compensation cost for these plans been determined pursuant to the
alternative method under Statement No. 123, the Company's net loss and loss per
share would have been increased to the following pro forma amounts:
 
<TABLE>
<CAPTION>
                                                                     YEAR ENDED JUNE 30,
                                                                ------------------------------
                                                                     1997            1996
                                                                --------------  --------------
<S>                                                             <C>             <C>
Net loss--
  As reported.................................................  $  (11,244,831) $  (10,113,250)
  Pro forma...................................................     (13,003,529)    (10,227,189)
Loss per share--
  As reported.................................................            (.93)          (1.06)
  Pro forma...................................................           (1.08)          (1.08)
</TABLE>
 
    Because the Statement No. 123 method of accounting has not been applied to
options granted prior to July 1, 1995, the resulting pro forma compensation cost
may not be representative of that to be expected in future years. Additionally,
the 1997 pro forma amounts include $5,028 related to the purchase discount
offered under the Company's Employee Stock Purchase Plan. The weighted average
fair value of shares granted to employees in fiscal year 1997 was $3.25.
 
    The Company's outstanding options are segregated into the following three
categories in accordance with Statement No. 123:
 
<TABLE>
<CAPTION>
                                                       WEIGHTED
                                          WEIGHTED      AVERAGE
                            RANGE OF       AVERAGE     REMAINING
OUTSTANDING  EXERCISABLE    EXERCISE      EXERCISE    CONTRACTUAL
  SHARES       SHARES         PRICE         PRICE        LIFE
- -----------  -----------  -------------  -----------  -----------
<S>          <C>          <C>            <C>          <C>
     25,502      25,502   $  0.37-$0.67   $    0.51    4.2 years
  2,058,388     998,221       2.55-3.50        3.04    8.8 years
    121,500      21,417       4.00-8.25        5.09    8.9 years
</TABLE>
 
                                      F-13
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 6. STOCK INCENTIVE AND PURCHASE PLANS (CONTINUED)
    In December 1994, Cyberonics canceled outstanding stock options for the
purchase of 100,700 shares of the Company's Common Stock with a weighted average
exercise price of $7.46 per share and in exchange granted stock options for the
same number of shares and with the same vesting provisions following a one-year
halt on exercisability at an exercise price of $5.25 per share, which equaled
the Company's market value per share on the date of reissuance. In November
1996, Cyberonics canceled outstanding stock options for the purchase of 354,800
shares of the Company's Common Stock with a weighted average exercise price of
$5.20 per share and in exchange granted stock options for the same number of
shares and with the same vesting provisions following a halt on exercisability
until the sooner of 14 months expired or FDA advisory panel approval was
received for the Company's product, at an exercise price of $3.06 per share,
which equaled the Company's market value per share on the date of reissuance.
 
    STOCK PURCHASE PLAN.  Under the Cyberonics, Inc. Employee Stock Purchase
Plan (the "Stock Purchase Plan"), 100,000 shares of the Company's Common Stock
have been reserved for issuance. Subject to certain limits, the Stock Purchase
Plan allows eligible employees to purchase shares of the Company's Common Stock
through payroll deductions of up to 15 percent of their respective current
compensation at a price equaling the lesser of 85 percent of the fair market
value of the Company's Common Stock on (a) the first business day of the
purchase period or (b) the last business day of the purchase period. Purchase
periods, under provisions of the Stock Purchase Plan, are six months in length
and begin on the first business days of June and December. At June 30, 1997,
10,137 shares remain available for future issuances under the Stock Purchase
Plan.
 
    STOCK RECOGNITION PROGRAM.  In May 1992, the Company's Board of Directors
established the Cyberonics Employee Stock Recognition Program. Since its
inception, a total of 8,600 shares of the Company's Common Stock has been
reserved for issuance as special recognition grants. The shares are granted to
employees for special performances and/or contributions at the discretion of the
Company's President, based on nominations made by fellow employees. At June 30,
1997, 4,030 shares remain available for future issuances under the program.
 
NOTE 7. INCOME TAXES
 
Components of the Company's loss before taxes are as follows:
 
<TABLE>
<CAPTION>
                                                             YEAR ENDED JUNE 30,
                                                ---------------------------------------------
                                                     1997            1996           1995
                                                --------------  --------------  -------------
<S>                                             <C>             <C>             <C>
Domestic......................................  $   (8,730,646) $   (8,772,435) $  (6,604,780)
Foreign.......................................      (2,514,185)     (1,340,815)      (634,030)
                                                --------------  --------------  -------------
                                                $  (11,244,831) $  (10,113,250) $  (7,238,810)
                                                --------------  --------------  -------------
                                                --------------  --------------  -------------
</TABLE>
 
                                      F-14
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 7. INCOME TAXES (CONTINUED)
    A reconciliation of the statutory federal income tax rate to the Company's
effective income tax rate is as follows:
 
<TABLE>
<CAPTION>
                                                                     YEAR ENDED JUNE 30,
                                                               -------------------------------
                                                                 1997       1996       1995
                                                               ---------  ---------  ---------
<S>                                                            <C>        <C>        <C>
U.S. statutory rate..........................................      (34.0)%     (34.0)%     (34.0)%
Increase in deferred tax valuation allowance.................       35.1       30.8       31.4
Amortization of deferred compensation........................        0.1       (0.1)       0.4
Other, net...................................................       (1.2)       3.3        2.2
                                                               ---------  ---------  ---------
                                                                     0.0%       0.0%       0.0%
                                                               ---------  ---------  ---------
                                                               ---------  ---------  ---------
</TABLE>
 
    Significant components of the Company's deferred tax assets and liabilities
are as follows:
 
<TABLE>
<CAPTION>
                                                                           JUNE 30,
                                                                 ----------------------------
                                                                     1997           1996
                                                                 -------------  -------------
<S>                                                              <C>            <C>
Deferred tax assets:
  Federal net operating loss carryforwards.....................  $  14,350,529  $  11,436,378
  Foreign net operating loss carryforwards.....................      1,191,384        210,852
  Tax credit carryforwards.....................................      1,254,312      1,003,964
  Warranties...................................................         78,816         57,046
  Depreciation.................................................         76,006         77,787
  Clinical costs...............................................         55,083         81,772
  Other, net...................................................        132,586        169,161
                                                                 -------------  -------------
    Total deferred tax assets..................................     17,138,716     13,036,960
Total deferred tax liabilities, net............................        (12,676)       (23,514)
Deferred tax valuation allowance...............................    (17,126,040)   (13,013,446)
                                                                 -------------  -------------
                                                                 -------------  -------------
    Net deferred tax assets and liabilities....................  $    --        $    --
                                                                 -------------  -------------
                                                                 -------------  -------------
</TABLE>
 
                                      F-15
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 7. INCOME TAXES (CONTINUED)
 
    At June 30, 1997, the Company has net operating loss carryforwards of
approximately $42,200,000 for federal income tax purposes, which expire during
the years 2003 through 2012, and tax credit carryforwards of approximately
$1,300,000 for federal income tax purposes, which expire during the years 2006
through 2012. As the Company has had cumulative losses and there is no assurance
of future taxable income, a valuation allowance totaling $17,126,040 is
established as of June 30, 1997, to fully offset the Company's net deferred tax
assets, including those relating to its carryforwards. The valuation allowance
increased $4,112,594 and $3,117,728 for the years ended June 30, 1997 and 1996,
due primarily to the Company's additional net operating losses. Current federal
income tax regulations with respect to changes in ownership could limit the
utilization of the Company's net operating loss carryforwards.
 
NOTE 8. EMPLOYEE RETIREMENT SAVINGS PLAN
 
    In September 1994, Cyberonics implemented an employee retirement savings
plan (the "Plan") which qualifies under Section 401(k) of the Internal Revenue
Code. The Plan is designed to provide eligible employees with an opportunity to
make regular contributions into a long-term investment and savings program.
Substantially all U.S. employees are eligible to participate in the Plan
beginning with the first quarterly open enrollment date following start of
employment. Employer contributions are made solely at the Company's discretion.
No employer contributions were made to the Plan for the years ended June 30,
1997, 1996 and 1995.
 
NOTE 9. COMMITMENTS AND CONTINGENCIES
 
    POSTMARKET CLINICAL SURVEILLANCE.  Pursuant to the postmarket surveillance
conditions specified as part of the Company's recent FDA marketing approval, the
Company is required to conduct clinical follow-up on a limited number of
patients from its most recent study in order to monitor the safety and
tolerability of the NCP-Registered Trademark- System on an extended basis. The
Company expenses the costs related to these long-term follow-up activities as
they are incurred and establishes accruals for such costs incurred but not paid
as of the respective balance sheet dates.
 
    LICENSE AGREEMENTS.  The Company executed a license agreement which provides
Cyberonics with worldwide exclusive rights under three United States patents
(and their international counterparts) covering the method and devices of the
NCP System for vagus nerve and other cranial nerve stimulation for the control
of epilepsy and other movement disorders. The license agreement provides that
the Company will pay a royalty equal to the greater of $36,000 per year or at
the rate of 6 percent on the first $12 million of sales and at the rate of 3
percent thereafter for the remaining term of the licensed patents. The license
agreement runs for successive three-year terms, renewable at the Company's
election. The license agreement, and its periods of extension, may not be
terminated by the licensor without cause. The Company's royalty payments
pursuant to this agreement are ratably charged to expense.
 
    On July 28, 1989, the Company executed a license agreement for a specific
application of lead designs to be used in vagus nerve stimulation for the
control of epilepsy and other movement disorders. The licensor retains all
rights to this patent for applications outside the above specified use. Pursuant
to the license agreement, as amended in 1991, the Company was obligated to pay a
license fee of $200,000, of which all had been paid as of June 30, 1997. The
Company has a limited-term option to expand the
 
                                      F-16
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 9. COMMITMENTS AND CONTINGENCIES (CONTINUED)
licensed field of use for additional indications for a license fee of $15,000
per indication and has made partial payments for certain such indications.
Amounts due under this agreement are being charged to expense as incurred. In
addition, the Company is obligated to pay the licensor an earned royalty of 1
percent of the Company's net sales price of implantable systems incorporating
the licenser's standard lead and 1.75 percent of net sales incorporating the
licenser's bi-directional lead. The Company paid royalties of $26,000 during
fiscal year 1995 and $35,000 during each of fiscal years 1996 and 1997, and has
agreed to pay minimum royalties of $35,000 in each fiscal year thereafter for
the life of the licensed patents.
 
    LEASE AGREEMENTS.  The Company leases offices, manufacturing and sales
distribution facilities as well as transportation and office equipment under
operating leases. Future minimum payments relating to these agreements at June
30, 1997, are as follows:
 
<TABLE>
<CAPTION>
YEAR ENDED JUNE 30,
- ----------------------------------------------------
<S>                                                   <C>
1998................................................  $  282,934
1999................................................     160,737
2000................................................      83,409
2001................................................      16,307
2002................................................      13,778
                                                      ----------
                                                      $  557,165
                                                      ----------
                                                      ----------
</TABLE>
 
    The Company is negotiating an operating lease agreement for a new domestic
office and manufacturing facility totaling approximately 22,000 square feet and
expanding to approximately 41,000 square feet by March 1998. Future minimum
payments relating to this lease are expected to be approximately $287,000 for
the year ending June 30, 1998, $679,000 for each of the years ending June 30,
1999 through 2002, and $848,000 in aggregate beyond June 30, 2002.
 
    OTHER COMMITMENTS.  At June 30, 1997, Cyberonics had approximately $650,000
in noncancelable commitments related to domestic launch activities planned for
the Company's NCP System during fiscal 1998.
 
NOTE 10. CONCENTRATIONS OF CREDIT RISK
 
    The Company's cash equivalents and securities held to maturity represent
potential concentrations of credit risk. The Company minimizes potential
concentrations of credit risk in cash equivalents and marketable securities by
placing investments in high quality financial instruments and, as required by
its corporate investment policy, limiting the amount of investment in any one
issuing party. At June 30, 1997, management believes that the Company has no
significant concentrations of credit risk and has incurred no material
impairments in the carrying values of its cash equivalents and securities held
to maturity.
 
NOTE 11. GEOGRAPHIC AREA INFORMATION
 
    The Company's business activities are represented by a single industry
segment, the manufacturing and distribution of medical products. For management
purposes, the Company is segmented into two geographic areas: North America and
Europe (which includes all export sales to unaffiliated customers in
 
                                      F-17
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 11. GEOGRAPHIC AREA INFORMATION (CONTINUED)
Europe, the Middle East, Africa and Asia/Pacific). Sales between geographic
areas are made at prices which would approximate transfers to unaffiliated
distributors. Because of the interdependence of the Company's geographic areas,
the operating loss as presented below may not be representative of the
geographic distribution which would occur if the areas were not interdependent.
 
    The Company's net sales, losses from operations and assets by geographic
area for the fiscal years that separate geographic business units have operated
are as follows:
 
<TABLE>
<CAPTION>
                                                         NORTH
                                                        AMERICA         EUROPE      ELIMINATIONS    CONSOLIDATED
                                                     --------------  -------------  -------------  --------------
<S>                                                  <C>             <C>            <C>            <C>
1997
Customer sales.....................................  $       24,452  $   1,347,553  $    --        $    1,372,005
Intercompany sales.................................       1,256,150       --           (1,256,150)       --
                                                     --------------  -------------  -------------  --------------
Total net sales....................................  $    1,280,602  $   1,347,553  $  (1,256,150) $    1,372,005
                                                     --------------  -------------  -------------  --------------
                                                     --------------  -------------  -------------  --------------
Loss from operations...............................  $  (11,610,600) $  (2,314,614) $   2,441,713  $  (11,483,501)
                                                     --------------  -------------  -------------  --------------
                                                     --------------  -------------  -------------  --------------
Identifiable assets................................  $    9,902,199  $   1,135,011  $    (787,473) $   10,249,737
                                                     --------------  -------------  -------------  --------------
                                                     --------------  -------------  -------------  --------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                         NORTH
                                                        AMERICA         EUROPE      ELIMINATIONS    CONSOLIDATED
                                                     --------------  -------------  -------------  --------------
<S>                                                  <C>             <C>            <C>            <C>
1996
Customer sales.....................................  $      109,691  $   1,307,274  $    --        $    1,416,965
Intercompany sales.................................       1,227,500       --           (1,227,500)       --
                                                     --------------  -------------  -------------  --------------
Total net sales....................................  $    1,337,191  $   1,307,274  $  (1,227,500) $    1,416,965
                                                     --------------  -------------  -------------  --------------
                                                     --------------  -------------  -------------  --------------
Loss from operations...............................  $  (10,492,597) $  (1,243,843) $   1,297,230  $  (10,439,210)
                                                     --------------  -------------  -------------  --------------
                                                     --------------  -------------  -------------  --------------
Identifiable assets................................  $    3,689,080  $     420,193  $    (161,230) $    3,948,043
                                                     --------------  -------------  -------------  --------------
                                                     --------------  -------------  -------------  --------------
</TABLE>
 
<TABLE>
<CAPTION>
                                                         NORTH
                                                        AMERICA         EUROPE      ELIMINATIONS    CONSOLIDATED
                                                     --------------  -------------  -------------  --------------
<S>                                                  <C>             <C>            <C>            <C>
1995
Customer sales.....................................  $      204,187  $     762,802  $    --        $      966,989
Intercompany sales.................................         778,437       --             (778,437)       --
                                                     --------------  -------------  -------------  --------------
Total net sales....................................  $      982,624  $     762,802  $    (778,437) $      966,989
                                                     --------------  -------------  -------------  --------------
                                                     --------------  -------------  -------------  --------------
Loss from operations...............................  $   (7,917,323) $    (671,384) $     623,626  $   (7,965,081)
                                                     --------------  -------------  -------------  --------------
                                                     --------------  -------------  -------------  --------------
Identifiable assets................................  $   13,509,248  $     282,305  $    (230,960) $   13,560,593
                                                     --------------  -------------  -------------  --------------
                                                     --------------  -------------  -------------  --------------
</TABLE>
 
                                      F-18
<PAGE>
                                CYBERONICS, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                           JUNE 30, 1997 (CONTINUED)
 
NOTE 12. QUARTERLY FINANCIAL INFORMATION--UNAUDITED
 
    The tables below contain summarized unaudited quarterly data for the years
ended June 30, 1997 and 1996. The Company believes this information reflects all
adjustments, consisting of normal recurring accruals, considered necessary for a
fair presentation of the quarterly information presented. The operating results
for any quarter presented are not necessarily indicative of the results that may
be expected for future periods.
 
<TABLE>
<CAPTION>
                                            FIRST         SECOND          THIRD         FOURTH         ANNUAL
                                           QUARTER        QUARTER        QUARTER        QUARTER        TOTALS
                                        -------------  -------------  -------------  -------------  -------------
<S>                                     <C>            <C>            <C>            <C>            <C>
1997
Net sales.............................  $     284,943  $     437,818  $     288,979  $     360,265  $   1,372,005
Gross profit..........................        215,652        279,437        216,310        288,426        999,825
Operating expenses....................      2,237,235      2,977,854      3,339,736      3,928,501     12,483,326
Net loss..............................     (1,792,521)    (2,696,226)    (3,050,028)    (3,706,056)   (11,244,831)
Net loss per share....................  $        (.16) $        (.23) $        (.26) $        (.28) $        (.93)
Shares used in computing net loss per
  share...............................     11,216,235     11,765,178     11,824,121     13,315,148     12,030,171
</TABLE>
 
<TABLE>
<CAPTION>
                                            FIRST         SECOND          THIRD         FOURTH         ANNUAL
                                           QUARTER        QUARTER        QUARTER        QUARTER        TOTALS
                                        -------------  -------------  -------------  -------------  -------------
<S>                                     <C>            <C>            <C>            <C>            <C>
1996
Net sales.............................  $     192,310  $     400,236  $     292,818  $     531,601  $   1,416,965
Gross profit..........................        136,250        299,977        221,203        347,973      1,005,403
Operating expenses....................      2,414,645      2,892,027      2,665,176      3,472,765     11,444,613
Net loss..............................     (2,129,564)    (2,475,081)    (2,340,296)    (3,168,309)   (10,113,250)
Net loss per share....................  $        (.22) $        (.26) $        (.25) $        (.33) $       (1.06)
Shares used in computing net loss per
  share...............................      9,500,209      9,503,971      9,509,345      9,538,626      9,513,038
</TABLE>
 
    Quarterly and annual loss per share are computed independently based upon
the applicable number of weighted average common shares and share equivalents
for each period.
 
                                      F-19
<PAGE>
- -------------------------------------------
                                     -------------------------------------------
- -------------------------------------------
                                     -------------------------------------------
 
    NO DEALER, SALES REPRESENTATIVE OR ANY OTHER PERSON HAS BEEN AUTHORIZED TO
GIVE ANY INFORMATION OR TO MAKE ANY REPRESENTATIONS IN CONNECTION WITH THIS
OFFERING OTHER THAN THOSE CONTAINED OR INCORPORATED BY REFERENCE IN THIS
PROSPECTUS, AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT
BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY OR ANY OF THE
UNDERWRITERS.THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER TO SELL OR A
SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OTHER THAN THE SHARES OF COMMON
STOCK TO WHICH IT RELATES OR AN OFFER TO, OR A SOLICITATION OF, ANY PERSON IN
ANY JURISDICTION WHERE SUCH AN OFFER OR SOLICITATION WOULD BE UNLAWFUL. 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 OR THAT INFORMATION CONTAINED HEREIN IS CORRECT AS OF ANY
TIME SUBSEQUENT TO THE DATE HEREOF.
 
                             ----------------------
 
                               TABLE OF CONTENTS
 
                             ----------------------
 
<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
<S>                                                                         <C>
PROSPECTUS SUMMARY........................................................     3
RISK FACTORS..............................................................     5
USE OF PROCEEDS...........................................................    13
PRICE RANGE OF COMMON STOCK...............................................    13
THE COMPANY...............................................................    13
DIVIDEND POLICY...........................................................    14
CAPITALIZATION............................................................    14
DILUTION..................................................................    15
SELECTED CONSOLIDATED FINANCIAL DATA......................................    16
MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF
  OPERATIONS..............................................................    17
BUSINESS..................................................................    21
MANAGEMENT................................................................    37
PRINCIPAL STOCKHOLDERS....................................................    39
UNDERWRITING..............................................................    41
LEGAL MATTERS.............................................................    42
EXPERTS...................................................................    42
ADDITIONAL INFORMATION....................................................    42
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE...........................    43
CONSOLIDATED FINANCIAL STATEMENTS.........................................   F-1
</TABLE>
 
                                3,000,000 SHARES
 
                                     [LOGO]
 
                                  COMMON STOCK
 
                                  ------------
 
                                   PROSPECTUS
                                  ------------
 
                             MONTGOMERY SECURITIES
 
                               PIPER JAFFRAY INC.
 
                                          , 1997
 
- -------------------------------------------
                                     -------------------------------------------
- -------------------------------------------
                                     -------------------------------------------
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
    The following table sets forth the costs and expenses, other than the
underwriting commission, payable by the Registrant in connection with the sale
of Common Stock being registered. All amounts are estimates except the SEC
registration fee, the NASD filing fee and the Nasdaq additional listing fee.
 
<TABLE>
<CAPTION>
                                                                             AMOUNT TO BE PAID
                                                                             -----------------
<S>                                                                          <C>
SEC registration fee.......................................................     $    14,506
NASD filing fee............................................................           5,287
Nasdaq additional listing fee..............................................          17,500
Blue Sky fees and expenses.................................................           5,000
Printing expenses..........................................................          75,000
Legal fees and expenses....................................................         200,000
Accounting fees and expenses...............................................         100,000
Miscellaneous expenses.....................................................          32,707
                                                                                   --------
  Total....................................................................     $   450,000
                                                                                   --------
                                                                                   --------
</TABLE>
 
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
    Section 145 of the Delaware General Corporation Law authorizes a court to
award, or a corporation's Board of Directors to grant, indemnity to directors
and officers in terms sufficiently broad to permit such indemnification under
certain circumstances for liabilities (including reimbursement for expenses
incurred) arising under the Securities Act of 1933, as amended (the "Securities
Act"). The Registrant's Restated Certificate of Incorporation and Article VI
Section 6.1 of the Registrant's Bylaws provide for indemnification of the
Registrant's directors and officers to the maximum extent permitted by the
Delaware General Corporation Law. The Registrant also maintains, and intends to
continue to maintain, insurance for the benefit of its directors and officers to
insure such persons against certain liabilities, including liabilities under the
Securities laws. In addition, the Registrant has entered into indemnity
agreements with each of its officers and directors. Reference is also made to
Section 8 of the Underwriting Agreement (Exhibit 1.1 hereto) indemnifying
officers and directors of the Registrant against certain liabilities.
 
ITEM 16. EXHIBITS
 
<TABLE>
<S>        <C>
 1.1       Form of Underwriting Agreement.
 4.1     (1) Preferred Shares Rights Agreement, dated as of March 4, 1997 between
           Cyberonics, Inc. and First National Bank of Boston, including the
           Certificate of Designation, the form of Rights Certificate and the Summary
           of Rights attached thereto as Exhibit A, B and C, respectively.
 5.1       Opinion of Wilson Sonsini Goodrich & Rosati, P.C.
23.1       Consent of Independent Public Accountants.
23.2       Consent of Wilson Sonsini Goodrich & Rosati, P.C. (included in Exhibit 5.1)
24         Power of Attorney (see page II-3).
</TABLE>
 
- ------------------------
 
(1) Incorporated by reference to the Company's Registration Statement on Form
    8-A (Commission File No. 000-19806) filed on March 6, 1997.
 
                                      II-1
<PAGE>
ITEM 17. UNDERTAKINGS.
 
    (a) The Registrant hereby undertakes that:
 
        (1) For purposes of determining any liability under the Securities Act,
    the information omitted from the form of prospectus filed as part of a
    registration statement in reliance upon Rule 430A and contained in the form
    of prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or
    497(h) under the Securities Act shall be deemed to be part of the
    registration statement as of the time it was declared effective.
 
        (2) For the purpose of determining any liability under the Securities
    Act, each post-effective amendment that contains a form of prospectus shall
    be deemed to be a new registration statement relating to the securities
    offered therein, and the offering of such securities at that time shall be
    deemed to be the initial bona fide offering thereof.
 
    (b) The undersigned Registrant hereby undertakes to provide to the
Underwriters at the closing specified in the Underwriting Agreement certificates
in such denominations and registered in such names as required by the
Underwriters to permit prompt delivery to each Purchaser.
 
    (c) Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the Registrant's Certificate of Incorporation, Bylaws,
indemnification agreements or otherwise, the Registrant has been advised that in
the opinion of the Securities and Exchange Commission such indemnification is
against public policy as expressed in the Securities Act and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by Registrant of expenses incurred or paid
by a director, officer or controlling person of Registrant in the successful
defense of any action, suit or proceeding) is asserted by such director, officer
or controlling person in connection with the securities being registered,
Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as
expressed in the Securities Act and will be governed by the final adjudication
of such issue.
 
                                      II-2
<PAGE>
                                   SIGNATURES
 
    Pursuant to the requirements of the Securities Act, the Registrant certifies
that it has reasonable grounds to believe that it meets all the requirements for
filing on Form S-3 and has duly caused this Registration Statement on Form S-3
to be signed on its behalf by the undersigned, thereunto duly authorized, in the
City of Webster, State of Texas, on this 15th day of August, 1997.
 
<TABLE>
<S>                             <C>  <C>
                                CYBERONICS, INC.
 
                                By:            /s/ ROBERT P. CUMMINS
                                     ------------------------------------------
                                                 Robert P. Cummins
                                       PRESIDENT AND CHIEF EXECUTIVE OFFICER
</TABLE>
 
                               POWER OF ATTORNEY
 
    KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears
below hereby constitutes and appoints Reese S. Terry, Jr. and John K. Bakewell,
and each of them, their true and lawful attorneys and agents, with full power of
substitution, each with power to act alone, to sign and execute on behalf of the
undersigned any and all amendments (including without limitation any
post-effective amendments and amendments thereto) to this Registration Statement
on Form S-3 requests to accelerate this Registration Statement, and any
registration statement for the same offering that is to be effective under Rule
462(b) of the Securities Act, and to perform any acts necessary in order to file
the same, with all exhibits thereto and other documents in connection with the
Securities and Exchange Commission and each of the undersigned does hereby
ratify and confirm all that said attorneys and agents, or their or his or her
substitutes, shall do or cause to be done by virtue hereof.
 
    Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed by the following persons in the
capacities and on the dates indicated:
 
<TABLE>
<CAPTION>
                    SIGNATURE                                 TITLE                   DATE
- --------------------------------------------------  -------------------------  ------------------
 
<S>                                                 <C>                        <C>
             /s/ REESE S. TERRY, JR.                Chairman of the Board and
     ----------------------------------------         Executive Vice            August 15, 1997
               Reese S. Terry, Jr.                    President
 
                                                    President, Chief
              /s/ ROBERT P. CUMMINS                   Executive Officer and
     ----------------------------------------         Director (Principal       August 15, 1997
                Robert P. Cummins                     Executive Officer)
 
                                                    Vice President, Finance
               /s/ JOHN K. BAKEWELL                   and Administration and
     ----------------------------------------         Chief Financial Officer   August 15, 1997
                 John K. Bakewell                     (Principal Financial
                                                      and Accounting Officer)
 
               /s/ STANLEY H. APPEL
     ----------------------------------------       Director                    August 15, 1997
              Stanley H. Appel, M.D.
 
                 /s/ TONY COELHO
     ----------------------------------------       Director                    August 15, 1997
                   Tony Coelho
 
              /s/ THOMAS A. DUERDEN
     ----------------------------------------       Director                    August 15, 1997
             Thomas A. Duerden, Ph.D.
 
              /s/ MICHAEL J. STRAUSS
     ----------------------------------------       Director                    August 15, 1997
             Michael J. Strauss, M.D.
</TABLE>
 
                                      II-3

<PAGE>



                                                                   Exhibit 1.1











                                   3,000,000 SHARES




                                   CYBERONICS, INC.



                                     COMMON STOCK





                                UNDERWRITING AGREEMENT

                             DATED ________________, 1997


<PAGE>

                                  TABLE OF CONTENTS


                                                                            PAGE

Section 1.  Representations and Warranties..................................  2
    COMPLIANCE WITH REGISTRATION REQUIREMENTS...............................  2
    OFFERING MATERIALS FURNISHED TO UNDERWRITERS............................  2
    DISTRIBUTION OF OFFERING MATERIAL BY THE COMPANY........................  2
    THE UNDERWRITING AGREEMENT..............................................  2
    AUTHORIZATION OF THE COMMON SHARES......................................  2
    NO APPLICABLE REGISTRATION OR OTHER SIMILAR RIGHTS......................  3
    NO MATERIAL ADVERSE CHANGE..............................................  3
    INDEPENDENT ACCOUNTANTS.................................................  3
    PREPARATION OF THE FINANCIAL STATEMENTS.................................  3
    INCORPORATION AND GOOD STANDING OF THE COMPANY AND ITS SUBSIDIARY.......  3
    CAPITALIZATION AND OTHER CAPITAL STOCK MATTERS..........................  3
    STOCK EXCHANGE LISTING..................................................  4
    NON-CONTRAVENTION OF EXISTING INSTRUMENTS; NO FURTHER AUTHORIZATIONS
      OR APPROVALS REQUIRED.................................................  4
    NO MATERIAL ACTIONS OR PROCEEDINGS......................................  4
    INTELLECTUAL PROPERTY RIGHTS............................................  5
    ALL NECESSARY PERMITS, ETC..............................................  5
    TITLE TO PROPERTIES.....................................................  5
    TAX LAW COMPLIANCE......................................................  5
    COMPANY NOT AN "INVESTMENT COMPANY".....................................  5
    INSURANCE...............................................................  5
    NO PRICE STABILIZATION OR MANIPULATION..................................  5
    RELATED PARTY TRANSACTIONS..............................................  6
    NO UNLAWFUL CONTRIBUTIONS OR OTHER PAYMENTS.............................  6
    COMPANY'S ACCOUNTING SYSTEM.............................................  6
    COMPLIANCE WITH ENVIRONMENTAL LAWS......................................  6
    EXCHANGE ACT COMPLIANCE.................................................  6
Section 2.  Purchase, Sale and Delivery of the Common Shares................  7
    THE FIRM COMMON SHARES..................................................  7
    THE FIRST CLOSING DATE..................................................  7
    THE OPTIONAL COMMON SHARES; THE SECOND CLOSING DATE.....................  7
    PUBLIC OFFERING OF THE COMMON SHARES....................................  8
    PAYMENT FOR THE COMMON SHARES...........................................  8
    DELIVERY OF THE COMMON SHARES...........................................  8
    DELIVERY OF PROSPECTUS TO THE UNDERWRITERS..............................  8

Section 3.  Covenants of the Company........................................  8
    UNDERWRITERS' REVIEW OF PROPOSED AMENDMENTS AND SUPPLEMENTS.............  8
    SECURITIES ACT COMPLIANCE...............................................  8
    AMENDMENTS AND SUPPLEMENTS TO THE PROSPECTUS AND OTHER SECURITIES ACT
      MATTERS...............................................................  9
    COPIES OF ANY AMENDMENTS AND SUPPLEMENTS TO THE PROSPECTUS..............  9
    BLUE SKY COMPLIANCE.....................................................  9
    USE OF PROCEEDS.........................................................  9
    TRANSFER AGENT..........................................................  9
    EARNINGS STATEMENT......................................................  9
    PERIODIC REPORTING OBLIGATIONS..........................................  9
    AGREEMENT NOT TO OFFER OR SELL ADDITIONAL SECURITIES....................  9
    FUTURE REPORTS TO THE UNDERWRITERS...................................... 10


                                         -i-

<PAGE>

Section 4.  Payment of Expenses............................................. 10

Section 5.  Conditions of the Obligations of the Underwriters............... 10
    ACCOUNTANTS' COMFORT LETTER............................................. 11
    COMPLIANCE WITH REGISTRATION REQUIREMENTS; NO STOP ORDER; NO OBJECTION
      FROM NASD............................................................. 11
    NO MATERIAL ADVERSE CHANGE OR RATINGS AGENCY CHANGE..................... 11
    OPINION OF COUNSEL FOR THE COMPANY...................................... 11
    OPINION OF PATENT COUNSEL FOR THE COMPANY............................... 11
    OPINION OF SPECIAL REGULATORY COUNSEL FOR THE COMPANY................... 12
    OPINION OF COUNSEL FOR THE UNDERWRITERS................................. 12
    OFFICERS' CERTIFICATE................................................... 12
    BRING-DOWN COMFORT LETTER............................................... 12
    LOCK-UP AGREEMENT FROM CERTAIN OFFICERS, DIRECTORS AND EMPLOYEES OF
      THE COMPANY........................................................... 12
    ADDITIONAL DOCUMENTS.................................................... 12

Section 6.  Reimbursement of Underwriters' Expenses......................... 13

Section 7.  Effectiveness of this Agreement................................. 13

Section 8.  Indemnification................................................. 13
    INDEMNIFICATION OF THE UNDERWRITERS..................................... 13
    INDEMNIFICATION OF THE COMPANY, ITS DIRECTORS AND OFFICERS.............. 14
    NOTIFICATIONS AND OTHER INDEMNIFICATION PROCEDURES...................... 14
    SETTLEMENTS............................................................. 15

Section 9.  Contribution.................................................... 15

Section 10.  [Intentionally Left Blank]..................................... 16

Section 11.  Termination of this Agreement.................................. 16

Section 12.  Representations and Indemnities to Survive Delivery............ 17

Section 13.  Notices........................................................ 17

Section 14.  Successors..................................................... 18

Section 15.  Partial Unenforceability....................................... 18

Section 16.................................................................. 18
    GOVERNING LAW PROVISIONS................................................ 18
    CONSENT TO JURISDICTION................................................. 18
    WAIVER OF IMMUNITY...................................................... 18

Section 17.  General Provisions............................................. 19

                                         -ii-

<PAGE>

                                UNDERWRITING AGREEMENT




_______________, 1997


MONTGOMERY SECURITIES
PIPER JAFFRAY INC.
c/o MONTGOMERY SECURITIES
600 Montgomery Street
San Francisco, California  94111


Ladies and Gentlemen:

         INTRODUCTORY.  Cyberonics, Inc., a Delaware corporation (the 
"Company), proposes to issue and sell to Montgomery Securities and Piper 
Jaffray Inc. (the "Underwriters") an aggregate of 3,000,000 shares (the "Firm 
Common Shares") of its Common Stock, par value $.01 per share (the "Common 
Stock").  In addition, the Company has granted to the Underwriters an option 
to purchase up to an additional 450,000 shares (the "Optional Common Shares") 
of Common Stock, as provided in Section 2.  The Firm Common Shares and, if 
and to the extent such option is exercised, the Optional Common Shares are 
collectively called the "Common Shares".

         The Company has prepared and filed with the Securities and Exchange
Commission (the "Commission") a registration statement on Form S-3 (File No.
333-_____), which contains a form of prospectus to be used in connection with
the public offering and sale of the Common Shares.  Such registration statement,
as amended, including the financial statements, exhibits and schedules thereto,
in the form in which it was declared effective by the Commission under the
Securities Act of 1933 and the rules and regulations promulgated thereunder
(collectively, the "Securities Act"), including all documents incorporated or
deemed to be incorporated by reference therein and any information deemed to be
a part thereof at the time of effectiveness pursuant to Rule 430A or Rule 434
under the Securities Act or the Securities Exchange Act of 1934 and the rules
and regulations promulgated thereunder (collectively, the "Exchange Act"), is
called the "Registration Statement".  Any registration statement filed by the
Company pursuant to Rule 462(b) under the Securities Act is called the "Rule
462(b) Registration Statement", and from and after the date and time of filing
of the Rule 462(b) Registration Statement the term "Registration Statement"
shall include the Rule 462(b) Registration Statement.  Such prospectus, in the
form first used by the Underwriters to confirm sales of the Common Shares, is
called the "Prospectus"; PROVIDED, HOWEVER, if the Company has, with the consent
of Montgomery Securities, elected to rely upon Rule 434 under the Securities
Act, the term "Prospectus" shall mean the Company's prospectus subject to
completion (each, a "preliminary prospectus") dated _____________, 1997 (such
preliminary prospectus is called the "Rule 434 preliminary prospectus"),
together with the applicable term sheet (the "Term Sheet") prepared and filed by
the Company with the Commission under Rules 434 and 424(b) under the Securities
Act and all references in this Agreement to the date of the Prospectus shall
mean the date of the Term Sheet.  All references in this Agreement to the
Registration Statement, the Rule 462(b) Registration Statement, a preliminary
prospectus, the Prospectus or the Term Sheet, or any amendments or supplements
to any of the foregoing, shall include any copy thereof filed with the
Commission pursuant to its Electronic Data Gathering, Analysis and Retrieval
System ("EDGAR").

    All references in this Agreement to financial statements and schedules and
other information which is "contained," "included" or "stated" in the
Registration Statement or the Prospectus (and all other references of like
import) shall be deemed to mean and include all such financial statements and
schedules and other information which is or is deemed to be incorporated by
reference in the Registration Statement or the Prospectus, as the case may be;
and all references in this Agreement to amendments or supplements to the
Registration Statement or the Prospectus shall be deemed to mean and include the
filing of any document under the Exchange Act which is or is deemed to be
incorporated by reference in the Registration Statement or the Prospectus, as
the case may be.

                                         -1-

<PAGE>

         The Company hereby confirms its agreement with the Underwriters as
follows:

    1.  REPRESENTATIONS AND WARRANTIES.

    The Company hereby represents, warrants and covenants to each Underwriter
as follows:

         (a)  COMPLIANCE WITH REGISTRATION REQUIREMENTS.  The Registration
    Statement and any Rule 462(b) Registration Statement have been declared
    effective by the Commission under the Securities Act.  No stop order
    suspending the effectiveness of the Registration Statement or any Rule
    462(b) Registration Statement is in effect and no proceedings for such
    purpose are pending or, to the knowledge of the Company, have been
    instituted or are contemplated or threatened by the Commission.

         Each preliminary prospectus and the Prospectus when filed complied in
    all material respects with the Securities Act and, if filed by electronic
    transmission pursuant to EDGAR (except as may be permitted by Regulation
    S-T under the Securities Act), was identical to the copy thereof delivered
    to the Underwriters for use in connection with the offer and sale of the
    Common Shares.  Each of the Registration Statement, any Rule 462(b)
    Registration Statement and any post-effective amendment thereto, at the
    time it became effective and at all subsequent times, complied and will
    comply in all material respects with the Securities Act and did not and
    will not contain any untrue statement of a material fact or omit to state a
    material fact required to be stated therein or necessary to make the
    statements therein not misleading.  The Prospectus, as amended or
    supplemented, as of its date and at all subsequent times, did not and will
    not contain any untrue statement of a material fact or omit to state a
    material fact necessary in order to make the statements therein, in the
    light of the circumstances under which they were made, not misleading.  The
    representations and warranties set forth in the two immediately preceding
    sentences do not apply to statements in or omissions from the Registration
    Statement, any Rule 462(b) Registration Statement, or any post-effective
    amendment thereto, or the Prospectus, or any amendments or supplements
    thereto, made in reliance upon and in conformity with information relating
    to any Underwriter furnished to the Company in writing by the Underwriters
    expressly for use therein.  There are no contracts or other documents
    required to be described in the Prospectus or to be filed as exhibits to
    the Registration Statement which have not been described or filed as
    required.

         (b)  OFFERING MATERIALS FURNISHED TO UNDERWRITERS.  The Company has
    delivered to each Underwriter one complete manually signed copies of the
    Registration Statement and of each consent and certificate of experts filed
    as a part thereof, and conformed copies of the Registration Statement
    (without exhibits) and preliminary prospectuses and the Prospectus, as
    amended or supplemented, in such quantities and at such places as the
    Underwriters have reasonably requested for each of the Underwriters.

         (c)  DISTRIBUTION OF OFFERING MATERIAL BY THE COMPANY.  The Company
    has not distributed and will not distribute, prior to the later of the
    Second Closing Date (as defined below) and the completion of the
    Underwriters' distribution of the Common Shares, any offering material in
    connection with the offering and sale of the Common Shares other than a
    preliminary prospectus, the Prospectus or the Registration Statement.

         (d)  THE UNDERWRITING AGREEMENT.  This Agreement has been duly
    authorized, executed and delivered by, and is a valid and binding agreement
    of, the Company, enforceable in accordance with its terms, except as rights
    to indemnification hereunder may be limited by applicable law and except as
    the enforcement hereof may be limited by bankruptcy, insolvency,
    reorganization, moratorium or other similar laws relating to or affecting
    the rights and remedies of creditors or by general equitable principles.

         (e)  AUTHORIZATION OF THE COMMON SHARES.  The Common Shares to be
    purchased by the Underwriters from the Company have been duly authorized
    for issuance and sale pursuant to this Agreement and, when issued and
    delivered by the Company pursuant to this Agreement, will be validly
    issued, fully paid and nonassessable.

                                         -2-

<PAGE>

         (f)  NO APPLICABLE REGISTRATION OR OTHER SIMILAR RIGHTS.  There are no
    persons with registration or other similar rights to have any equity or
    debt securities registered for sale under the Registration Statement or
    included in the offering contemplated by this Agreement, except for such
    rights as have been duly waived.

         (g)  NO MATERIAL ADVERSE CHANGE.  Except as otherwise disclosed in the
    Prospectus, subsequent to the respective dates as of which information is
    given in the Prospectus: (i)  there has been no material adverse change, or
    any development that could reasonably be expected to result in a material
    adverse change, in the condition, financial or otherwise, or in the
    earnings, business, operations or prospects, whether or not arising from
    transactions in the ordinary course of business, of the Company and its
    subsidiary, considered as one entity (any such change is called a "Material
    Adverse Change"); (ii) the Company and its subsidiary, considered as one
    entity, have not incurred any material liability or obligation, indirect,
    direct or contingent, not in the ordinary course of business nor entered
    into any material transaction or agreement not in the ordinary course of
    business; and (iii) there has been no dividend or distribution of any kind
    declared, paid or made by the Company or, except for dividends paid to the
    Company, its subsidiary on any class of capital stock or repurchase or
    redemption by the Company or its subsidiary of any class of capital stock.

         (h)  INDEPENDENT ACCOUNTANTS.  Arthur Andersen LLP, who have expressed
    their opinion with respect to the financial statements (which term as used
    in this Agreement includes the related notes thereto) [and supporting
    schedules] filed with the Commission as a part of the Registration
    Statement and included in the Prospectus, are, to the knowledge of the
    Company, independent public or certified public accountants as required by
    the Securities Act and the Exchange Act.

         (i)  PREPARATION OF THE FINANCIAL STATEMENTS.  The financial
    statements filed with the Commission as a part of the Registration
    Statement and included in the Prospectus present fairly the consolidated
    financial position of the Company and its subsidiary as of and at the dates
    indicated and the results of their operations and cash flows for the
    periods specified.  [The supporting schedules included in the Registration
    Statement present fairly the information required to be stated therein.]
    Such financial statements [and supporting schedules] have been prepared in
    conformity with generally accepted accounting principles as applied in the
    United States applied on a consistent basis throughout the periods
    involved, except as may be expressly stated in the related notes thereto.
    No other financial statements or supporting schedules are required to be
    included in the Registration Statement.  The financial data set forth in
    the Prospectus under the captions "Prospectus Summary--Summary Consolidated
    Financial Data", "Selected Consolidated Financial Data" and
    "Capitalization" fairly present the information set forth therein on a
    basis consistent with that of the audited financial statements contained in
    the Registration Statement.

         (j)  INCORPORATION AND GOOD STANDING OF THE COMPANY AND ITS
    SUBSIDIARY.  Each of the Company and its subsidiary has been duly
    incorporated or organized and is validly existing as a corporation in good
    standing under the laws of the jurisdiction of its incorporation or
    organization and has corporate power and authority to own, lease and
    operate its properties and to conduct its business as described in the
    Prospectus and, in the case of the Company, to enter into and perform its
    obligations under this Agreement.  Each of the Company and its subsidiary
    is duly qualified as a foreign corporation to transact business and is in
    good standing in each jurisdiction in which such qualification is required,
    whether by reason of the ownership or leasing of property or the conduct of
    business, except for such jurisdictions where the failure to so qualify or
    to be in good standing would not, individually or in the aggregate, result
    in a Material Adverse Change.  All of the issued and outstanding capital
    stock of the Company's subsidiary has been duly authorized and validly
    issued, is fully paid and nonassessable and is owned by the Company free
    and clear of any security interest, mortgage, pledge, lien, encumbrance or
    claim.  The Company does not own or control, directly or indirectly, any
    corporation, association or other entity other than the subsidiary listed
    in Exhibit 21 to the Company's Annual Report on Form 10-K for the fiscal
    year ended June 30, 1997.

         (k)  CAPITALIZATION AND OTHER CAPITAL STOCK MATTERS.  The authorized,
    issued and outstanding capital stock of the Company is as set forth in the
    Prospectus under the caption "Capitalization" (other than for subsequent
    issuances, if any, pursuant to employee benefit plans described in the
    Prospectus or upon exercise of outstanding options described in the
    Prospectus).  The Common Stock (including the Common Shares)

                                         -3-

<PAGE>

    conforms in all material respects to the description thereof contained in
    the Prospectus, or incorporated by reference therein.  All of the issued
    and outstanding shares of Common Stock have been duly authorized and
    validly issued, are fully paid and nonassessable and have been issued in
    compliance with federal and state securities laws.  None of the outstanding
    shares of Common Stock were issued in violation of any preemptive rights,
    rights of first refusal or other similar rights to subscribe for or
    purchase securities of the Company.  There are no authorized or outstanding
    options, warrants, preemptive rights, rights of first refusal or other
    rights to purchase, or equity or debt securities convertible into or
    exchangeable or exercisable for, any capital stock of the Company or any of
    its subsidiaries other than those accurately described in the Prospectus.
    The description of the Company's stock option, stock bonus and other stock
    plans or arrangements, and the options or other rights granted thereunder,
    set forth in the Prospectus, or incorporated by reference therein,
    accurately and fairly presents the information required to be shown with
    respect to such plans, arrangements, options and rights.

         (l)  STOCK EXCHANGE LISTING.  The Common Stock (including the Common
    Shares) is registered pursuant to Section 12(g) of the Securities Exchange
    Act of 1934 (the "Exchange Act") and is listed on the Nasdaq National
    Market, and the Company has taken no action designed to, or reasonably
    likely to have the effect of, terminating the registration of the Common
    Stock under the Exchange Act or delisting the Common Stock from the Nasdaq
    National Market, nor has the Company received any notification that the
    Commission or the National Association of Securities Dealers, Inc. (the
    "NASD") is contemplating terminating such registration or listing.

         (m)  NON-CONTRAVENTION OF EXISTING INSTRUMENTS; NO FURTHER
    AUTHORIZATIONS OR APPROVALS REQUIRED.  Neither the Company nor its
    subsidiary is in violation of its charter or by-laws or is in default (or,
    with the giving of notice or lapse of time, would be in default)
    ("Default") under any indenture, mortgage, loan or credit agreement, note,
    contract, franchise, lease or other instrument to which the Company or its
    subsidiary is a party or by which it or any of them may be bound or to
    which any of the property or assets of the Company or its subsidiary is
    subject (each, an "Existing Instrument"), except for such Defaults as would
    not, individually or in the aggregate, result in a Material Adverse Change.
    The Company's execution, delivery and performance of this Agreement and
    consummation of the transactions contemplated hereby and by the Prospectus
    (i) have been duly authorized by all necessary corporate action and will
    not result in any violation of the provisions of the charter or by-laws of
    the Company or its subsidiary, (ii) will not conflict with or constitute a
    breach of, or Default under, or result in the creation or imposition of any
    lien, charge or encumbrance upon any property or assets of the Company or
    its subsidiary pursuant to, or require the consent of any other part to,
    any Existing Instrument, except for such conflicts, breaches, Defaults,
    liens, charges or encumbrances as would not, individually or in the
    aggregate, result in a Material Adverse Change and (iii) will not result in
    any violation of any law, administrative regulation or administrative or
    court decree applicable to the Company or its subsidiary.  No consent,
    approval, authorization or other order of, or registration or filing with,
    any court or other governmental or regulatory authority or agency, is
    required for the Company's execution, delivery and performance of this
    Agreement and consummation of the transactions contemplated hereby and by
    the Prospectus, except such as have been obtained or made by the Company
    and are in full force and effect under the Securities Act, applicable state
    securities or blue sky laws and from the NASD.

         (n)  NO MATERIAL ACTIONS OR PROCEEDINGS.  There are no legal or
    governmental actions, suits or proceedings pending or, to the best of the
    Company's knowledge, threatened (i) against or affecting the Company or its
    subsidiary, (ii) which has as the subject thereof any officer or director
    (in their roles as such) of, or property owned or leased by, the Company or
    its subsidiary or (iii) relating to environmental or discrimination
    matters, where in any such case (A) there is a reasonable possibility that
    such action, suit or proceeding might be determined adversely to the
    Company or its subsidiary and (B) any such action, suit or proceeding, if
    so determined adversely, would reasonably be expected to result in a
    Material Adverse Change or adversely affect the consummation of the
    transactions contemplated by this Agreement.  No material labor dispute
    with the employees of the Company or its subsidiary exists or, to the
    Company's knowledge, is threatened or imminent.

                                         -4-

<PAGE>


         (o)  INTELLECTUAL PROPERTY RIGHTS.  The Company and its subsidiaries
    own or possess sufficient trademarks, trade names, patent rights,
    copyrights, licenses, approvals, trade secrets and other similar rights
    (collectively, "Intellectual Property Rights") reasonably necessary to
    conduct their businesses as now conducted; and the expected expiration of
    any of such Intellectual Property Rights would not result in a Material
    Adverse Change in the five years subsequent to the date hereof.  Neither
    the Company nor its subsidiary has received any notice of infringement or
    conflict with asserted Intellectual Property Rights of others, which
    infringement or conflict, if the subject of an unfavorable decision, would
    result in a Material Adverse Change.

         (p)  ALL NECESSARY PERMITS, ETC.  The Company and its subsidiary
    possess such valid and current certificates, authorizations or permits
    issued by the appropriate state, federal or foreign regulatory agencies or
    bodies necessary to conduct their respective businesses, and neither the
    Company nor its subsidiary has received any notice of proceedings relating
    to the revocation or modification of, or non-compliance with, any such
    certificate, authorization or permit which, singly or in the aggregate, if
    the subject of an unfavorable decision, ruling or finding, could result in
    a Material Adverse Change.

         (q)  TITLE TO PROPERTIES.  The Company and its subsidiary have good
    and marketable title to all the properties and assets reflected as owned in
    the financial statements referred to in Section 1(i) above, in each case
    free and clear of any security interests, mortgages, liens, encumbrances,
    equities, claims and other defects, except such as do not materially and
    adversely affect the value of such property and do not materially interfere
    with the use made or proposed to be made of such property by the Company or
    its subsidiary.  The real property, improvements, equipment and personal
    property held under lease by the Company and its subsidiary are held under
    valid and enforceable leases, with such exceptions as are not material and
    do not materially interfere with the use made or proposed to be made of
    such real property, improvements, equipment or personal property by the
    Company or its subsidiary.

         (r)  TAX LAW COMPLIANCE.  The Company and its subsidiary have filed
    all necessary federal, state and foreign income and franchise tax returns
    and have paid all taxes required to be paid by each of them.  The Company
    has made adequate charges, accruals and reserves in the applicable
    financial statements referred to in Section 1(i)  above in respect of all
    federal, state and foreign income and franchise taxes for all periods as to
    which the tax liability of the Company or its subsidiary has not been
    finally determined.

         (s)  COMPANY NOT AN "INVESTMENT COMPANY".  The Company has been
    advised of the rules and requirements under the Investment Company Act of
    1940, as amended (the "Investment Company Act").  The Company is not, and
    after receipt of payment for the Common Shares will not be, an "investment
    company" within the meaning of Investment Company Act and will conduct its
    business in a manner so that it will not become subject to the Investment
    Company Act.

         (t)  INSURANCE.  Each of the Company and its subsidiary is insured by
    recognized, financially sound and reputable institutions with policies in
    such amounts and with such deductibles and covering such risks as are
    generally deemed adequate and customary for their businesses including, but
    not limited to, policies covering real and personal property owned or
    leased by the Company and its subsidiary against theft, damage, destruction
    and acts of vandalism.  The Company has no reason to believe that it or its
    subsidiary will not be able (i) to renew its existing insurance coverage as
    and when such policies expire or (ii) to obtain comparable coverage from
    similar institutions as may be necessary or appropriate to conduct its
    business as now conducted and at a cost that would not result in a Material
    Adverse Change.  Neither of the Company nor its subsidiary has been denied
    any insurance coverage which it has sought or for which it has applied.

         (u)  NO PRICE STABILIZATION OR MANIPULATION.  The Company has not
    taken and will not take, directly or indirectly, any action designed to or
    that might be reasonably expected to cause or result in stabilization or
    manipulation of the price of the Common Stock to facilitate the sale or
    resale of the Common Shares.

                                         -5-

<PAGE>

         (v)  RELATED PARTY TRANSACTIONS.  There are no business relationships
    or related-party transactions involving the Company or its subsidiary or
    any other person required to be described in the Prospectus which have not
    been described as required.

         (w)  NO UNLAWFUL CONTRIBUTIONS OR OTHER PAYMENTS.  Neither the Company
    nor its subsidiary nor, to the Company's knowledge, any employee or agent
    of the Company or its subsidiary, has made any contribution or other
    payment to any official of, or candidate for, any federal, state or foreign
    office in violation of any law or of the character required to be disclosed
    in the Prospectus.

         (x)  COMPANY'S ACCOUNTING SYSTEM.  The Company maintains a system of
    accounting controls sufficient to provide reasonable assurances that (i)
    transactions are executed in accordance with management's general or
    specific authorization; (ii)  transactions are recorded as necessary to
    permit preparation of financial statements in conformity with generally
    accepted accounting principles as applied in the United States and to
    maintain accountability for assets; (iii) access to assets is permitted
    only in accordance with management's general or specific authorization; and
    (iv) the recorded accountability for assets is compared with existing
    assets at reasonable intervals and appropriate action is taken with respect
    to any differences.

         (y)  COMPLIANCE WITH ENVIRONMENTAL LAWS.  Except as would not,
    individually or in the aggregate, result in a Material Adverse Change (i)
    neither the Company nor its subsidiary is in violation of any federal,
    state, local or foreign law or regulation relating to pollution or
    protection of human health or the environment (including, without
    limitation, ambient air, surface water, groundwater, land surface or
    subsurface strata) or wildlife, including without limitation, laws and
    regulations relating to emissions, discharges, releases or threatened
    releases of chemicals, pollutants, contaminants, wastes, toxic substances,
    hazardous substances, petroleum and petroleum products (collectively,
    "Materials of Environmental Concern"), or otherwise relating to the
    manufacture, processing, distribution, use, treatment, storage, disposal,
    transport or handling of Materials of Environment Concern (collectively,
    "Environmental Laws"), which violation includes, but is not limited to,
    noncompliance with any permits or other governmental authorizations
    required for the operation of the business of the Company or its subsidiary
    under applicable Environmental Laws, or noncompliance with the terms and
    conditions thereof, nor has the Company or its subsidiary received any
    written communication, whether from a governmental authority, citizens
    group, employee or otherwise, that alleges that the Company or its
    subsidiary is in violation of any Environmental Law; (ii) there is no
    claim, action or cause of action filed with a court or governmental
    authority, no investigation with respect to which the Company has received
    written notice, and no written notice by any person or entity alleging
    potential liability for investigatory costs, cleanup costs, governmental
    responses costs, natural resources damages, property damages, personal
    injuries, attorneys' fees or penalties arising out of, based on or
    resulting from the presence, or release into the environment, of any
    Material of Environmental Concern at any location owned, leased or operated
    by the Company or its subsidiary, now or in the past (collectively,
    "Environmental Claims"), pending or, to the Company's knowledge, threatened
    against the Company or its subsidiary or any person or entity whose
    liability for any Environmental Claim the Company or its subsidiary has
    retained or assumed either contractually or by operation of law; and (iii)
    to the Company's knowledge, there are no past or present actions,
    activities, circumstances, conditions, events or incidents, including,
    without limitation, the release, emission, discharge, presence or disposal
    of any Material of Environmental Concern, that reasonably could result in a
    violation of any Environmental Law or form the basis of a potential
    Environmental Claim against the Company or its subsidiary or against any
    person or entity whose liability for any Environmental Claim the Company or
    its subsidiary has retained or assumed either contractually or by operation
    of law.

         (z)  EXCHANGE ACT COMPLIANCE.  The documents incorporated or deemed to
    be incorporated by reference in the Prospectus, at the time they were or
    hereafter are filed with the Commission, complied and will comply in all
    material respects with the requirements of the Exchange Act, and, when read
    together with the other information in the Prospectus, at the time the
    Registration Statement and any amendments thereto become effective and at
    the First Closing Date and the Second Closing Date, as the case may be, did
    not and will not contain an untrue statement of a material fact or omit to
    state a material fact required to be stated therein or necessary to make
    the fact required to be stated therein or necessary to make the statements
    therein, in the light of the circumstances under which they were made, not
    misleading.

                                         -6-

<PAGE>

         Any certificate signed by an officer of the Company and delivered to
the Underwriters or to counsel for the Underwriters shall be deemed to be a
representation and warranty by the Company to each Underwriter as to the matters
set forth therein.


    2.  PURCHASE, SALE AND DELIVERY OF THE COMMON SHARES.

    (a)  THE FIRM COMMON SHARES.  The Company agrees to issue and sell to the
several Underwriters the Firm Common Shares upon the terms herein set forth.  On
the basis of the representations, warranties and agreements herein contained,
and upon the terms but subject to the conditions herein set forth, the
Underwriters agree, severally and not jointly, to purchase from the Company the
respective number of Firm Common Shares set forth opposite their names on
SCHEDULE A.  The purchase price per Firm Common Share to be paid by the several
Underwriters to the Company shall be $___ per share.

    (b)  THE FIRST CLOSING DATE.  Delivery of certificates for the Firm Common
Shares to be purchased by the Underwriters and payment therefor shall be made at
the offices of Montgomery Securities, 600 Montgomery Street, San Francisco,
California  (or such other place as may be agreed to by the Company and the
Underwriters) at 6:00 a.m. San Francisco time, on ____________, 1997, or such
other time and date not later than 10:30 a.m. San Francisco time, on
____________, 1997 as the Underwriters shall designate by notice to the Company
(the time and date of such closing are called the "First Closing Date").  The
Company hereby acknowledges that circumstances under which the Underwriters may
provide notice to postpone the First Closing Date as originally scheduled
include, but are in no way limited to, any determination by the Company or the
Underwriters to recirculate to the public copies of an amended or supplemented
Prospectus or a delay as contemplated by the provisions of Section 10.

    (c)  THE OPTIONAL COMMON SHARES; THE SECOND CLOSING DATE.  In addition, on
the basis of the representations, warranties and agreements herein contained,
and upon the terms but subject to the conditions herein set forth, the Company
hereby grants an option to the several Underwriters to purchase, severally and
not jointly, up to an aggregate of 450,000 Optional Common Shares from the
Company at the purchase price per share to be paid by the Underwriters for the
Firm Common Shares.  The option granted hereunder is for use by the Underwriters
solely in covering any over-allotments in connection with the sale and
distribution of the Firm Common Shares.  The option granted hereunder may be
exercised at any time (but not more than once) upon notice by the Underwriters
to the Company, which notice may be given at any time within 30 days from the
date of this Agreement.  Such notice shall set forth (i) the aggregate number of
Optional Common Shares as to which the Underwriters are exercising the option,
(ii) the names and denominations in which the certificates for the Optional
Common Shares are to be registered and (iii) the time, date and place at which
such certificates will be delivered (which time and date may be simultaneous
with, but not earlier than, the First Closing Date; and in such case the term
"First Closing Date" shall refer to the time and date of delivery of
certificates for the Firm Common Shares and the Optional Common Shares).  Such
time and date of delivery, if subsequent to the First Closing Date, is called
the "Second Closing Date" and shall be determined by the Underwriters and shall
not be earlier than three nor later than five full business days after delivery
of such notice of exercise.  If any Optional Common Shares are to be purchased,
each Underwriter agrees, severally and not jointly, to purchase the number of
Optional Common Shares (subject to such adjustments to eliminate fractional
shares as the Underwriters may determine) that bears the same proportion to the
total number of Optional Common Shares to be purchased as the number of Firm
Common Shares set forth on SCHEDULE A opposite the name of such Underwriter
bears to the total number of Firm Common Shares and the Company agrees, to sell
that number of Optional Common Shares.  The Underwriters may cancel the option
at any time prior to its expiration by giving written notice of such
cancellation to the Company.

    (d)  PUBLIC OFFERING OF THE COMMON SHARES.  The Underwriters hereby advise
the Company that the Underwriters intend to offer for sale to the public, as
described in the Prospectus, their respective portions of the Common Shares as
soon after this Agreement has been executed and the Registration Statement has
been declared effective as the Underwriters, in their sole judgment, have
determined is advisable and practicable.

                                         -7-

<PAGE>

    (e)  PAYMENT FOR THE COMMON SHARES.  Payment for the Common Shares shall be
made at the First Closing Date (and, if applicable, at the Second Closing Date)
by wire transfer of immediately available funds to the order of the Company.

    (f)  DELIVERY OF THE COMMON SHARES.  The Company shall deliver, or cause to
be delivered, to the Underwriters certificates for the Firm Common Shares at the
First Closing Date, against the irrevocable release of a wire transfer of
immediately available funds for the amount of the purchase price therefor.  The
Company shall also deliver, or cause to be delivered, to the Underwriters,
certificates for the Optional Common Shares the Underwriters have agreed to
purchase at the First Closing Date or the Second Closing Date, as the case may
be, against the irrevocable release of a wire transfer of immediately available
funds for the amount of the purchase price therefor.  The certificates for the
Common Shares shall be in definitive form and registered in such names and
denominations as the Underwriters shall have requested at least two full
business days prior to the First Closing Date (or the Second Closing Date, as
the case may be) and shall be made available for inspection on the business day
preceding the First Closing Date (or the Second Closing Date, as the case may
be) at a location in New York City as the Underwriters may designate.  Time
shall be of the essence, and delivery at the time and place specified in this
Agreement is a further condition to the obligations of the Underwriters.

    (g)  DELIVERY OF PROSPECTUS TO THE UNDERWRITERS.  Not later than 12:00 p.m.
on the second business day following the date the Common Shares are released by
the Underwriters for sale to the public, the Company shall deliver or cause to
be delivered copies of the Prospectus in such quantities and at such places as
the Underwriters shall request.


    3.  COVENANTS OF THE COMPANY.

    The Company further covenants and agrees with each Underwriter as follows:

         (a)  UNDERWRITERS' REVIEW OF PROPOSED AMENDMENTS AND SUPPLEMENTS.
    During such period beginning on the date hereof and ending on the later of
    the First Closing Date or such date, as in the opinion of counsel for the
    Underwriters, the Prospectus is no longer required by law to be delivered
    in connection with sales by an Underwriter or dealer (the "Prospectus
    Delivery Period"), prior to amending or supplementing the Registration
    Statement (including any registration statement filed under Rule 462(b)
    under the Securities Act) or the Prospectus (including any amendment or
    supplement through incorporation by reference of any reports filed under
    the Exchange Act), the Company shall furnish to the Underwriters for review
    a copy of each such proposed amendment or supplement, and, unless required
    by law, the Company shall not file any such proposed amendment or
    supplement to which the Underwriters reasonably object.

         (b)  SECURITIES ACT COMPLIANCE.  After the date of this Agreement, the
    Company shall promptly advise the Underwriters in writing (i) of the
    receipt of any comments of, or requests for additional or supplemental
    information from, the Commission, (ii) of the time and date of any filing
    of any post-effective amendment to the Registration Statement or any
    amendment or supplement to any preliminary prospectus or the Prospectus,
    (iii) of the time and date that any post-effective amendment to the
    Registration Statement becomes effective and (iv) of the issuance by the
    Commission of any stop order suspending the effectiveness of the
    Registration Statement or any post-effective amendment thereto or of any
    order preventing or suspending the use of any preliminary prospectus or the
    Prospectus, or of any proceedings to remove, suspend or terminate from
    listing or quotation the Common Stock from any securities exchange upon
    which the Common Stock is listed for trading or included or designated for
    quotation, or of the threatening or initiation of any proceedings for any
    of such purposes.  If the Commission shall enter any such stop order at any
    time, the Company will use its best efforts to obtain the lifting of such
    order at the earliest possible moment.  Additionally, the Company agrees
    that it shall comply with the provisions of Rules 424(b), 430A and 434, as
    applicable, under the Securities Act and will use its reasonable efforts to
    confirm that any filings made by the Company under such Rule 424(b) were
    received in a timely manner by the Commission.

                                         -8-

<PAGE>

         (c)  AMENDMENTS AND SUPPLEMENTS TO THE PROSPECTUS AND OTHER SECURITIES
    ACT MATTERS.  If, during the Prospectus Delivery Period, any event shall
    occur or condition exist as a result of which it is necessary to amend or
    supplement the Prospectus in order to make the statements therein, in the
    light of the circumstances when the Prospectus is delivered to a purchaser,
    not misleading, or if in the opinion of the Underwriters or counsel for the
    Underwriters it is otherwise necessary to amend or supplement the
    Prospectus to comply with law, the Company agrees to promptly prepare
    (subject to Section 3(a) hereof), file with the Commission and furnish at
    its own expense to the Underwriters and to dealers, amendments or
    supplements to the Prospectus so that the statements in the Prospectus as
    so amended or supplemented will not, in the light of the circumstances when
    the Prospectus is delivered to a purchaser, be misleading or so that the
    Prospectus, as amended or supplemented, will comply with law.

         (d)  COPIES OF ANY AMENDMENTS AND SUPPLEMENTS TO THE PROSPECTUS.  The
    Company agrees to furnish the Underwriters, without charge, during the
    Prospectus Delivery Period, as many copies of the Prospectus and any
    amendments and supplements thereto (including any documents incorporated or
    deemed incorporated by reference therein) as the Underwriters may
    reasonably request.

         (e)  BLUE SKY COMPLIANCE.  The Company shall cooperate with the
    Underwriters and counsel for the Underwriters to qualify or register the
    Common Shares for sale under (or obtain exemptions from the application of)
    the or state securities or blue sky laws or Canadian provincial Securities
    laws of those jurisdictions designated by the Underwriters, shall comply
    with such laws and shall continue such qualifications, registrations and
    exemptions in effect so long as required for the distribution of the Common
    Shares.  The Company shall not be required to qualify as a foreign
    corporation or to take any action that would subject it to general service
    of process in any such jurisdiction where it is not presently qualified or
    where it would be subject to taxation as a foreign corporation.  The
    Company will advise the Underwriters promptly of the suspension of the
    qualification or registration of (or any such exemption relating to) the
    Common Shares for offering, sale or trading in any jurisdiction or any
    initiation or threat of any proceeding for any such purpose, and in the
    event of the issuance of any order suspending such qualification,
    registration or exemption, the Company shall use its best efforts to obtain
    the withdrawal thereof at the earliest possible moment.

         (f)  USE OF PROCEEDS.  The Company shall apply the net proceeds from
    the sale of the Common Shares sold by it in the manner described under the
    caption "Use of Proceeds" in the Prospectus.

         (g)  TRANSFER AGENT.  The Company shall continue to maintain, at its
    expense, a registrar and transfer agent for the Common Stock.

         (h)  EARNINGS STATEMENT.  As soon as practicable, the Company will
    make generally available to its security holders and to the Underwriters an
    earnings statement (which need not be audited) covering the twelve-month
    period ending December 31, 1998 that satisfies the provisions of Section
    11(a) of the Securities Act.

         (i)  PERIODIC REPORTING OBLIGATIONS.  During the Prospectus Delivery
    Period the Company shall file, on a timely basis, with the Commission and,
    to the extent required, the Nasdaq National Market, all reports and
    documents required to be filed under the Exchange Act.

         (j)  AGREEMENT NOT TO OFFER OR SELL ADDITIONAL SECURITIES.  During the
    period of 90 days following the date of the Prospectus, the Company will
    not, without the prior written consent of Montgomery Securities (which
    consent may be withheld at the sole discretion of Montgomery Securities),
    directly or indirectly, sell, offer, contract or grant any option to sell,
    pledge, transfer or establish an open "put equivalent position" within the
    meaning of Rule 16a-1(h) under the Exchange Act, or otherwise dispose of,
    or announce the offering of, or file any registration statement under the
    Securities Act in respect of, any shares of Common Stock, options or
    warrants to acquire shares of the Common Stock or securities exchangeable
    or exercisable for or convertible into shares of Common Stock (other than
    as contemplated by this Agreement with respect to the Common Shares);
    PROVIDED, HOWEVER, that the Company may issue shares of its Common Stock or
    options to purchase its Common Stock, or Common Stock upon exercise of
    options, pursuant to any stock option,

                                         -9-

<PAGE>

    stock bonus or other stock plan or arrangement described in the Prospectus
    or a document incorporated by reference in the Prospectus.

         (k)  FUTURE REPORTS TO THE UNDERWRITERS.  During the period of five
    years hereafter the Company will furnish to the Underwriters at 600
    Montgomery Street, San Francisco, CA 94111, Attention:  Michael Dovey:  (i)
    as soon as practicable after the end of each fiscal year, copies of the
    Annual Report of the Company containing the balance sheet of the Company as
    of the close of such fiscal year and statements of income, stockholders'
    equity and cash flows for the year then ended and the opinion thereon of
    the Company's independent public or certified public accountants; (ii) as
    soon as practicable after the filing thereof, copies of each proxy
    statement, Annual Report on Form 10-K, Quarterly Report on Form 10-Q,
    Current Report on Form 8-K or other report filed by the Company with the
    Commission, the NASD or any securities exchange; and (iii) as soon as
    available, copies of any report or communication of the Company mailed
    generally to holders of its capital stock.

    Montgomery Securities, on behalf of the Underwriters, may, in its sole
discretion, waive in writing the performance by the Company of any one or more
of the foregoing covenants or extend the time for their performance.


    4.  PAYMENT OF EXPENSES.

    The Company agrees to pay all costs, fees and expenses incurred in
connection with the performance of its obligations hereunder and in connection
with the transactions contemplated hereby, including without limitation (i) all
expenses incident to the issuance and delivery of the Common Shares (including
all printing and engraving costs), (ii) all fees and expenses of the registrar
and transfer agent of the Common Stock, (iii) all necessary issue, transfer and
other stamp taxes in connection with the issuance and sale of the Common Shares
to the Underwriters, (iv) all fees and expenses of the Company's counsel,
independent public or certified public accountants and other advisors, (v) all
costs and expenses incurred in connection with the preparation, printing,
filing, shipping and distribution of the Registration Statement (including
financial statements, exhibits, schedules, consents and certificates of
experts), each preliminary prospectus and the Prospectus, and all amendments and
supplements thereto, and this Agreement, (vi) all filing fees, attorneys' fees
and expenses incurred by the Company or the Underwriters in connection with
qualifying or registering (or obtaining exemptions from the qualification or
registration of) all or any part of the Common Shares for offer and sale under
the state securities or blue sky laws or the provincial securities laws of
Canada, and, if requested by the Underwriters, preparing and printing a "Blue
Sky Survey" or memorandum, and any supplements thereto, advising the
Underwriters of such qualifications, registrations and exemptions, (vii) the
filing fees incident to, and the reasonable fees and expenses of counsel for the
Underwriters in connection with, the NASD's review and approval of the
Underwriters' participation in the offering and distribution of the Common
Shares, (viii)  the fees and expenses associated with including the Common
Shares on the Nasdaq National Market, and (ix) all other fees, costs and
expenses referred to in Item 14 of Part II of the Registration Statement.
Except as provided in this Section 4, Section 6, Section 8 and Section 9 hereof,
the Underwriters shall pay their own expenses, including the fees and
disbursements of their counsel.


    5.  CONDITIONS OF THE OBLIGATIONS OF THE UNDERWRITERS.

    The obligations of the several Underwriters to purchase and pay for the
Common Shares as provided herein on the First Closing Date and, with respect to
the Optional Common Shares, the Second Closing Date, shall be subject to the
accuracy of the representations and warranties on the part of the Company set
forth in Section 1 hereof as of the date hereof and as of the First Closing Date
as though then made and, with respect to the Optional Common Shares, as of the
Second Closing Date as though then made, to the timely performance by the
Company of its covenants and other obligations hereunder, and to each of the
following additional conditions:

         (a)  ACCOUNTANTS' COMFORT LETTER.  On the date hereof, the
    Underwriters shall have received from Arthur Andersen LLP, independent
    public or certified public accountants for the Company, a letter dated the
    date hereof addressed to the Underwriters, in form and substance
    satisfactory to the Underwriters, containing

                                         -10-

<PAGE>

    statements and information of the type ordinarily included in accountant's
    "comfort letters" to underwriters, delivered according to Statement of
    Auditing Standards No. 72 (or any successor bulletin), with respect to the
    audited and unaudited financial statements and certain financial
    information contained in the Registration Statement and the Prospectus (and
    the Underwriters shall have received additional conformed copies of such
    accountants' letter for each of the several Underwriters).

         (b)  COMPLIANCE WITH REGISTRATION REQUIREMENTS; NO STOP ORDER; NO
    OBJECTION FROM NASD.  For the period from and after effectiveness of this
    Agreement and prior to the First Closing Date and, with respect to the
    Optional Common Shares, the Second Closing Date:

              (i) the Company shall have filed the Prospectus with the
         Commission (including the information required by Rule 430A under the
         Securities Act) in the manner and within the time period required by
         Rule 424(b) under the Securities Act; or the Company shall have filed
         a post-effective amendment to the Registration Statement containing
         the information required by such Rule 430A, and such post-effective
         amendment shall have become effective; or, if the Company elected to
         rely upon Rule 434 under the Securities Act and obtained the
         Underwriters' consent thereto, the Company shall have filed a Term
         Sheet with the Commission in the manner and within the time period
         required by such Rule 424(b);

              (ii) no stop order suspending the effectiveness of the
         Registration Statement, any Rule 462(b) Registration Statement, or any
         post-effective amendment to the Registration Statement, shall be in
         effect and no proceedings for such purpose shall have been instituted
         or threatened by the Commission; and

              (iii) the NASD shall have raised no objection to the fairness and
         reasonableness of the underwriting terms and arrangements.

         (c)  NO MATERIAL ADVERSE CHANGE OR RATINGS AGENCY CHANGE.  For the
    period from and after the date of this Agreement and prior to the First
    Closing Date and, with respect to the Optional Common Shares, the Second
    Closing Date:

              (i) in the judgment of the Underwriters there shall not have
         occurred any Material Adverse Change; and

              (ii) there shall not have occurred any downgrading, nor shall any
         notice have been given of any intended or potential downgrading or of
         any review for a possible change that does not indicate the direction
         of the possible change, in the rating accorded any securities of the
         Company or its subsidiary by any "nationally recognized statistical
         rating organization" as such term is defined for purposes of Rule
         436(g)(2) under the Securities Act.

         (d)  OPINION OF COUNSEL FOR THE COMPANY.  On each of the First Closing
    Date and the Second Closing Date, the Underwriters shall have received the
    favorable opinion of Wilson Sonsini Goodrich & Rosati, counsel for the
    Company, dated as of such Closing Date, the form of which is attached as
    EXHIBIT A.
    
     (e)  OPINION OF PATENT COUNSEL FOR THE COMPANY.  On each of the First
    Closing Date and the Second Closing Date, the Underwriters shall have
    received the favorable opinion of Wigman, Cohen, Leitner & Meyers, patent
    counsel for the Company, dated as of such Closing Date, the form of which
    is attached as EXHIBIT B.

         (f)  OPINION OF SPECIAL REGULATORY COUNSEL FOR THE COMPANY.  On each
    of the First Closing Date and the Second Closing Date, the Underwriters
    shall have received the favorable opinion of Hogan & Hartson LLP, special
    regulatory counsel for the Company, dated as of such Closing Date, the form
    of which is attached as EXHIBIT C.

                                         -11-

<PAGE>

         (g)  OPINION OF COUNSEL FOR THE UNDERWRITERS.  On each of the First
    Closing Date and the Second Closing Date the Underwriters shall have
    received the favorable opinion of Pillsbury Madison & Sutro LLP, counsel
    for the Underwriters, dated as of such Closing Date, with respect to the
    matters set forth in paragraphs[(i), (vii) (with respect to subparagraph
    (i) only), (viii), (ix), (x) (xi) and [xvi],] and the next-to-last
    paragraph of EXHIBIT A.

         (h)  OFFICERS' CERTIFICATE.  On each of the First Closing Date and the
    Second Closing Date the Underwriters shall have received a written
    certificate executed by the President and Chief Executive Officer of the
    Company and the Chief Financial Officer of the Company, dated as of such
    Closing Date, to the effect set forth in subsections (b)(ii) and (c)(ii) of
    this Section 5, and further to the effect that:

              (i) for the period from and after the date of this Agreement and
         prior to such Closing Date, there has not occurred any Material
         Adverse Change;

              (ii) the representations, warranties and covenants of the Company
         set forth in Section 1 of this Agreement are true and correct with the
         same force and effect as though expressly made on and as of such
         Closing Date; and

              (iii) the Company has complied with all the agreements and
         satisfied all the conditions on its part to be performed or satisfied
         at or prior to such Closing Date.

         (i)  BRING-DOWN COMFORT LETTER.  On each of the First Closing Date and
    the Second Closing Date the Underwriters shall have received from Arthur
    Andersen LLP, independent public or certified public accountants for the
    Company, a letter dated such date, in form and substance satisfactory to
    the Underwriters, to the effect that they reaffirm the statements made in
    the letter furnished by them pursuant to subsection (a) of this Section 5,
    except that the specified date referred to therein for the carrying out of
    procedures shall be no more than three business days prior to the First
    Closing Date or Second Closing Date, as the case may be (and the
    Underwriters shall have received additional conformed copies of such
    accountants' letter for each of the several Underwriters).

         (j)  LOCK-UP AGREEMENT FROM OFFICERS, DIRECTORS AND CERTAIN Employees
    of the Company.  On or prior to the date hereof, the Company shall have
    furnished to the Underwriters an agreement in the form of EXHIBIT D hereto
    from the officers, directors and certain employees, and such agreements
    shall be in full force and effect on each of the First Closing Date and the
    Second Closing Date.

         (k)  ADDITIONAL DOCUMENTS.  On or before each of the First Closing
    Date and the Second Closing Date, the Underwriters and counsel for the
    Underwriters shall have received such information, documents and opinions
    as they may reasonably require for the purposes of enabling them to pass
    upon the issuance and sale of the Common Shares as contemplated herein, or
    in order to evidence the accuracy of any of the representations and
    warranties, or the satisfaction of any of the conditions or agreements,
    herein contained.

    If any condition specified in this Section 5 is not satisfied when and as
required to be satisfied, this Agreement may be terminated by the Underwriters
by notice to the Company at any time on or prior to the First Closing Date and,
with respect to the Optional Common Shares, at any time prior to the Second
Closing Date, which termination shall be without liability on the part of any
party to any other party, except that Section 4, Section 6, Section 8 and
Section  9 shall at all times be effective and shall survive such termination.


    6.  REIMBURSEMENT OF UNDERWRITERS' EXPENSES.

    If this Agreement is terminated by the Underwriters pursuant to Section 5,
Section 7 or Section 11, or if the sale to the Underwriters of the Common Shares
on the First Closing Date is not consummated because of any refusal, inability
or failure on the part of the Company to perform any agreement herein or to
comply with any provision hereof, the Company agrees to reimburse the
Underwriters, severally, upon demand for all out-of-pocket expenses that shall

                                         -12-

<PAGE>

have been reasonably incurred by the Underwriters in connection with the
proposed purchase and the offering and sale of the Common Shares, including but
not limited to fees and disbursements of counsel, printing expenses, travel
expenses, postage, facsimile and telephone charges.


    7.  EFFECTIVENESS OF THIS AGREEMENT.

    This Agreement shall not become effective until the later of (i) the
execution of this Agreement by the parties hereto and (ii) notification by the
Commission to the Company of the effectiveness of the Registration Statement
under the Securities Act.

    After signing and prior to such effectiveness, this Agreement may be
terminated by any party by notice to each of the other parties hereto, and any
such termination shall be without liability on the part of (a) the Company to
any Underwriter, except that the Company shall be obligated to reimburse the
expenses of the Underwriters pursuant to Sections 4 and 6 hereof, (b) of any
Underwriter to the Company, or (c) of any party hereto to any other party except
that the provisions of Section 8 and Section 9 shall at all times be effective
and shall survive such termination.


    8.  INDEMNIFICATION.

         (a)  INDEMNIFICATION OF THE UNDERWRITERS.  The Company agrees to
    indemnify and hold harmless each Underwriter, its officers and employees,
    and each person, if any, who controls any Underwriter within the meaning of
    the Securities Act and the Exchange Act against any loss, claim, damage,
    liability or expense, as incurred, to which such Underwriter or such
    controlling person may become subject, under the Securities Act, the
    Exchange Act or other federal or state statutory law or regulation, or at
    common law or otherwise (including in settlement of any litigation, if such
    settlement is effected with the written consent of the Company), insofar as
    such loss, claim, damage, liability or expense (or actions in respect
    thereof as contemplated below) arises out of or is based (i) upon any
    untrue statement or alleged untrue statement of a material fact contained
    in the Registration Statement, or any amendment thereto, including any
    information deemed to be a part thereof pursuant to Rule 430A or Rule 434
    under the Securities Act, or the omission or alleged omission therefrom of
    a material fact required to be stated therein or necessary to make the
    statements therein not misleading; or (ii) upon any untrue statement or
    alleged untrue statement of a material fact contained in any preliminary
    prospectus or the Prospectus (or any amendment or supplement thereto), or
    the omission or alleged omission therefrom of a material fact necessary in
    order to make the statements therein, in the light of the circumstances
    under which they were made, not misleading; or (iii) in whole or in part
    upon any inaccuracy in the representations and warranties of the Company
    contained herein; or (iv) in whole or in part upon any failure of the
    Company to perform its obligations hereunder or under law; or (v) any act
    or failure to act or any alleged act or failure to act by any Underwriter
    in connection with, or relating in any manner to, the Common Stock or the
    offering contemplated hereby, and which is included as part of or referred
    to in any loss, claim, damage, liability or action arising out of or based
    upon any matter covered by clause (i) or (ii) above, PROVIDED that the
    Company shall not be liable under this clause (v) to the extent that a
    court of competent jurisdiction shall have determined by a final judgment
    that such loss, claim, damage, liability or action resulted directly from
    any such acts or failures to act undertaken or omitted to be taken by such
    Underwriter through its bad faith or willful misconduct; and to reimburse
    each Underwriter and each such controlling person for any and all expenses
    (including the fees and disbursements of counsel chosen by Montgomery
    Securities) as such expenses are reasonably incurred by such Underwriter or
    such controlling person in connection with investigating, defending,
    settling, compromising or paying any such loss, claim, damage, liability,
    expense or action; PROVIDED, HOWEVER, that the foregoing indemnity
    agreement shall not apply to any loss, claim, damage, liability or expense
    to the extent, but only to the extent, arising out of or based upon any
    untrue statement or alleged untrue statement or omission or alleged
    omission made in reliance upon and in conformity with written information
    furnished to the Company by the Underwriters expressly for use in the
    Registration Statement, any preliminary prospectus or the Prospectus (or
    any amendment or supplement thereto); and provided, further, that with
    respect to any preliminary prospectus, the foregoing indemnity agreement
    shall not inure to the benefit of any Underwriter from whom the person
    asserting any

                                         -13-

<PAGE>

    loss, claim, damage, liability or expense purchased Common Shares, or any
    person controlling such Underwriter, if copies of the Prospectus were
    timely delivered to the Underwriter pursuant to Section 2 and a copy of the
    Prospectus (as then amended or supplemented if the Company shall have
    furnished any amendments or supplements thereto) was not sent or given by
    or on behalf of such Underwriter to such person, if required by law so to
    have been delivered, at or prior to the written confirmation of the sale of
    the Common Shares to such person, and if the Prospectus (as so amended or
    supplemented) would have cured the defect giving rise to such loss, claim,
    damage, liability or expense.  The indemnity agreement set forth in this
    Section 8(a) shall be in addition to any liabilities that the Company may
    otherwise have.

         (b)  INDEMNIFICATION OF THE COMPANY, ITS DIRECTORS AND OFFICERS.  Each
    Underwriter agrees, severally and not jointly, to indemnify and hold
    harmless the Company, each of its directors, each of its officers who
    signed the Registration Statement and each person, if any, who controls the
    Company within the meaning of the Securities Act or the Exchange Act,
    against any loss, claim, damage, liability or expense, as incurred, to
    which the Company, or any such director, officer or controlling person may
    become subject, under the Securities Act, the Exchange Act, or other
    federal or state statutory law or regulation, or at common law or otherwise
    (including in settlement of any litigation, if such settlement is effected
    with the written consent of such Underwriter), insofar as such loss, claim,
    damage, liability or expense (or actions in respect thereof as contemplated
    below) arises out of or is based upon any untrue or alleged untrue
    statement of a material fact contained in the Registration Statement, any
    preliminary prospectus or the Prospectus (or any amendment or supplement
    thereto), or arises out of or is based upon the omission or alleged
    omission to state therein a material fact required to be stated therein or
    necessary to make the statements therein not misleading, in each case to
    the extent, but only to the extent, that such untrue statement or alleged
    untrue statement or omission or alleged omission was made in the
    Registration Statement, any preliminary prospectus, the Prospectus (or any
    amendment or supplement thereto), in reliance upon and in conformity with
    written information furnished to the Company by the Underwriters expressly
    for use therein; and to reimburse the Company, or any such director,
    officer or controlling person for any legal and other expense reasonably
    incurred by the Company, or any such director, officer or controlling
    person in connection with investigating, defending, settling, compromising
    or paying any such loss, claim, damage, liability, expense or action.  The
    Company hereby acknowledges that the only information that the Underwriters
    have furnished to the Company expressly for use in the Registration
    Statement, any preliminary prospectus or the Prospectus (or any amendment
    or supplement thereto) are the statements set forth (A) as the last two
    paragraphs on the inside front cover page of the Prospectus concerning
    stabilization and passive market making by the Underwriters and (B) in the
    table in the first paragraph and as the second paragraph and last paragraph
    under the caption "Underwriting" in the Prospectus; and the Underwriters
    confirm that such statements are correct. The indemnity agreement set forth
    in this Section 8(b) shall be in addition to any liabilities that each
    Underwriter may otherwise have.

         (c)  NOTIFICATIONS AND OTHER INDEMNIFICATION PROCEDURES.  Promptly
    after receipt by an indemnified party under this Section 8 of notice of the
    commencement of any action, such indemnified party will, if a claim in
    respect thereof is to be made against an indemnifying party under this
    Section 8, notify the indemnifying party in writing of the commencement
    thereof, but the omission so to notify the indemnifying party will not
    relieve it from any liability which it may have to any indemnified party
    for contribution or otherwise than under the indemnity agreement contained
    in this Section 8 or to the extent it is not prejudiced as a proximate
    result of such failure.  In case any such action is brought against any
    indemnified party and such indemnified party seeks or intends to seek
    indemnity from an indemnifying party, the indemnifying party will be
    entitled to participate in, and, to the extent that it shall elect, jointly
    with all other indemnifying parties similarly notified, by written notice
    delivered to the indemnified party promptly after receiving the aforesaid
    notice from such indemnified party, to assume the defense thereof with
    counsel reasonably satisfactory to such indemnified party; PROVIDED,
    HOWEVER, if the defendants in any such action include both the indemnified
    party and the indemnifying party and the indemnified party shall have
    reasonably concluded that a conflict may arise between the positions of the
    indemnifying party and the indemnified party in conducting the defense of
    any such action or that there may be legal defenses available to it and/or
    other indemnified parties which are different from or additional to those
    available to the indemnifying party, the indemnified party or parties shall
    have the right to select separate counsel to assume such legal defenses and
    to otherwise participate in the

                                         -14-

<PAGE>

    defense of such action on behalf of such indemnified party or parties.
    Upon receipt of notice from the indemnifying party to such indemnified
    party of such indemnifying party's election so to assume the defense of
    such action and approval by the indemnified party of counsel, the
    indemnifying party will not be liable to such indemnified party under this
    Section 8 for any legal or other expenses subsequently incurred by such
    indemnified party in connection with the defense thereof unless (i) the
    indemnified party shall have employed separate counsel in accordance with
    the proviso to the next preceding sentence (it being understood, however,
    that the indemnifying party shall not be liable for the expenses of more
    than one separate counsel (together with local counsel), approved by the
    indemnifying party (Montgomery Securities in the case of Section 8(b) and
    Section 9), representing the indemnified parties who are parties to such
    action) or (ii) the indemnifying party shall not have employed counsel
    satisfactory to the indemnified party to represent the indemnified party
    within a reasonable time after notice of commencement of the action, in
    each of which cases the fees and expenses of counsel shall be at the
    expense of the indemnifying party.

         (d)  SETTLEMENTS.  The indemnifying party under this Section 8 shall
    not be liable for any settlement of any proceeding effected without its
    written consent, but if settled with such consent or if there be a final
    judgment for the plaintiff, the indemnifying party agrees to indemnify the
    indemnified party against any loss, claim, damage, liability or expense by
    reason of such settlement or judgment.  Notwithstanding the foregoing
    sentence, if at any time an indemnified party shall have requested an
    indemnifying party to reimburse the indemnified party for fees and expenses
    of counsel as contemplated by Section 8(c) hereof, the indemnifying party
    agrees that it shall be liable for any settlement of any proceeding
    effected without its written consent if (i) such settlement is entered into
    more than 30 days after receipt by such indemnifying party of the aforesaid
    request and (ii) such indemnifying party shall not have reimbursed the
    indemnified party in accordance with such request prior to the date of such
    settlement.  No indemnifying party shall, without the prior written consent
    of the indemnified party, effect any settlement, compromise or consent to
    the entry of judgment in any pending or threatened action, suit or
    proceeding in respect of which any indemnified party is or could have been
    a party and indemnity was or could have been sought hereunder by such
    indemnified party, unless such settlement, compromise or consent includes
    an unconditional release of such indemnified party from all liability on
    claims that are the subject matter of such action, suit or proceeding.


    9.  CONTRIBUTION.

    If the indemnification provided for in Section 8 is for any reason held to
be unavailable to or otherwise insufficient to hold harmless an indemnified
party in respect of any losses, claims, damages, liabilities or expenses
referred to therein, then each indemnifying party shall contribute to the
aggregate amount paid or payable by such indemnified party, as incurred, as a
result of any losses, claims, damages, liabilities or expenses referred to
therein (i) in such proportion as is appropriate to reflect the relative
benefits received by the Company, on the one hand, and the Underwriters, on the
other hand, from the offering of the Common Shares pursuant to this Agreement or
(ii) if the allocation provided by clause (i) above is not permitted by
applicable law, in such proportion as is appropriate to reflect not only the
relative benefits referred to in clause (i) above but also the relative fault of
the Company, on the one hand, and the Underwriters, on the other hand, in
connection with the statements or omissions or inaccuracies in the
representations and warranties herein which resulted in such losses, claims,
damages, liabilities or expenses, as well as any other relevant equitable
considerations.  The relative benefits received by the Company, on the one hand,
and the Underwriters, on the other hand, in connection with the offering of the
Common Shares pursuant to this Agreement shall be deemed to be in the same
respective proportions as the total net proceeds from the offering of the Common
Shares pursuant to this Agreement (before deducting expenses) received by the
Company, and the total underwriting discount received by the Underwriters, in
each case as set forth on the front cover page of the Prospectus (or, if Rule
434 under the Securities Act is used, the corresponding location on the Term
Sheet) bear to the aggregate initial public offering price of the Common Shares
as set forth on such cover.  The relative fault of the Company, on the one hand,
and the Underwriters, on the other hand, shall be determined by reference to,
among other things, whether any such untrue or alleged untrue statement of a
material fact or omission or alleged omission to state a material fact or any
such inaccurate or alleged inaccurate representation or warranty relates to
information supplied by the Company, on the one hand, or the Underwriters, on
the other hand, and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission.

                                         -15-

<PAGE>

    The amount paid or payable by a party as a result of the losses, claims,
damages, liabilities and expenses referred to above shall be deemed to include,
subject to the limitations set forth in Section 8(c), any legal or other fees or
expenses reasonably incurred by such party in connection with investigating or
defending any action or claim.  The provisions set forth in Section 8(c) with
respect to notice of commencement of any action shall apply if a claim for
contribution is to be made under this Section 9; PROVIDED, HOWEVER, that no
additional notice shall be required with respect to any action for which notice
has been given under Section 8(c) for purposes of indemnification.

    The Company and the Underwriters agree that it would not be just and
equitable if contribution pursuant to this Section 9 were determined by pro rata
allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take account of the
equitable considerations referred to in this Section 9.

    Notwithstanding the provisions of this Section 9, no Underwriter shall be
required to contribute any amount in excess of the underwriting discounts
received by such Underwriter in connection with the Common Shares underwritten
by it and distributed to the public.  No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any person who was not guilty of such
fraudulent misrepresentation.  The Underwriters' obligations to contribute
pursuant to this Section 9 are several, and not joint, in proportion to their
respective underwriting commitments as set forth opposite their names in
SCHEDULE A.  For purposes of this Section 9, each officer and employee of an
Underwriter and each person, if any, who controls an Underwriter within the
meaning of the Securities Act and the Exchange Act shall have the same rights to
contribution as such Underwriter, and each director of the Company, each officer
of the Company who signed the Registration Statement, and each person, if any,
who controls the Company with the meaning of the Securities Act and the Exchange
Act shall have the same rights to contribution as the Company.


    10.  [INTENTIONALLY LEFT BLANK].


    11.  TERMINATION OF THIS AGREEMENT.

    Prior to the First Closing Date this Agreement may be terminated by the
Underwriters by notice given to the Company if at any time (i) trading or
quotation in any of the Company's securities shall have been suspended or
limited by the Commission or by the Nasdaq Stock Market, or trading in
securities generally on either the Nasdaq Stock Market or the New York Stock
Exchange shall have been suspended or limited, or minimum or maximum prices
shall have been generally established on any of such stock exchanges by the
Commission or the NASD; (ii) a general banking moratorium shall have been
declared by any of federal, New York, Delaware, Texas or California authorities;
(iii) there shall have occurred any outbreak or escalation of national or
international hostilities or any crisis or calamity, or any change in the United
States or international financial markets, or any substantial change or
development involving a prospective substantial change in United States' or
international political, financial or economic conditions, as in the judgment of
the Underwriters is material and adverse and makes it impracticable to market
the Common Shares in the manner and on the terms described in the Prospectus or
to enforce contracts for the sale of securities; (iv) in the judgment of the
Underwriters there shall have occurred any Material Adverse Change; or (v) the
Company shall have sustained a loss by strike, fire, flood, earthquake, accident
or other calamity of such character as in the judgment of the Underwriters may
interfere materially with the conduct of the business and operations of the
Company regardless of whether or not such loss shall have been insured.  Any
termination pursuant to this Section 11 shall be without liability on the part
of (a) the Company to any Underwriter, except that the Company shall be
obligated to reimburse the expenses of the Underwriters pursuant to Sections 4
and 6 hereof, (b)  any Underwriter to the Company, or (c) of any party hereto to
any other party except that the provisions of Section 8 and Section 9 shall at
all times be effective and shall survive such termination.

                                         -16-

<PAGE>

    12.  REPRESENTATIONS AND INDEMNITIES TO SURVIVE DELIVERY.

    The respective indemnities, agreements, representations, warranties and
other statements of the Company, of its officers and of the Underwriters set
forth in or made pursuant to this Agreement will remain in full force and
effect, regardless of any investigation made by or on behalf of any Underwriter
or the Company or any of its or their partners, officers or directors or any
controlling person, as the case may be, and will survive delivery of and payment
for the Common Shares sold hereunder and any termination of this Agreement.


    13.  NOTICES.

    All communications hereunder shall be in writing and shall be mailed, hand
delivered or telecopied and confirmed to the parties hereto as follows:

    If to the Underwriters:

    Montgomery Securities
    600 Montgomery Street
    San Francisco, California  94111
    Facsimile:  415-249-5558
    Attention:  Richard A. Smith

    with a copy to:

    Montgomery Securities
    600 Montgomery Street
    San Francisco, California  94111
    Facsimile:  (415) 249-5553
    Attention:  David A. Baylor, Esq.

    If to the Company:

    Cyberonics, Inc.
    17448 Highway 3, Suite 100
    Webster, Texas 77598
    Facsimile:  (281) 332-3615
    Attention:  Robert P. Cummins

                                         -17-

<PAGE>

    with a copy to:

    Wilson Sonsini Goodrich & Rosati
    650 Page Mill Road
    Palo Alto, California  94304
    Facsimile:  (650) 493-6811
    Attention:  Kenneth M. Siegal, Esq.

Any party hereto may change the address for receipt of communications by giving
written notice to the others.


    14.  SUCCESSORS.

    This Agreement will inure to the benefit of and be binding upon the parties
hereto, and to the benefit of the employees, officers and directors and
controlling persons referred to in Section 8 and Section 9, and in each case
their respective successors, and no other person will have any right or
obligation hereunder.  The term "successors" shall not include any purchaser of
the Common Shares as such from any of the Underwriters merely by reason of such
purchase.


    15.  PARTIAL UNENFORCEABILITY.

    The invalidity or unenforceability of any Section, paragraph or provision
of this Agreement shall not affect the validity or enforceability of any other
Section, paragraph or provision hereof.  If any Section, paragraph or provision
of this Agreement is for any reason determined to be invalid or unenforceable,
there shall be deemed to be made such minor changes (and only such minor
changes) as are necessary to make it valid and enforceable.


    16.(a)  GOVERNING LAW PROVISIONS.  THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK
APPLICABLE TO AGREEMENTS MADE AND TO BE PERFORMED IN SUCH STATE.

    (a)  CONSENT TO JURISDICTION.  Any legal suit, action or proceeding arising
out of or based upon this Agreement or the transactions contemplated hereby
("Related Proceedings") may be instituted in the federal courts of the United
States of America located in the City and County of San Francisco or the courts
of the State of California in each case located in the City and County of San
Francisco (collectively, the "Specified Courts"), and each party irrevocably
submits to the exclusive jurisdiction (except for proceedings instituted in
regard to the enforcement of a judgment of any such court (a "Related
Judgment"), as to which such jurisdiction is non-exclusive) of such courts in
any such suit, action or proceeding.  Service of any process, summons, notice or
document by mail to such party's address set forth above shall be effective
service of process for any suit, action or other proceeding brought in any such
court.  The parties irrevocably and unconditionally waive any objection to the
laying of venue of any suit, action or other proceeding in the Specified Courts
and irrevocably and unconditionally waive and agree not to plead or claim in any
such court that any such suit, action or other proceeding brought in any such
court has been brought in an inconvenient forum.

    (b)  WAIVER OF IMMUNITY.  With respect to any Related Proceeding, each
party irrevocably waives, to the fullest extent permitted by applicable law, all
immunity (whether on the basis of sovereignty or otherwise) from jurisdiction,
service of process, attachment (both before and after judgment) and execution to
which it might otherwise be entitled in the Specified Courts, and with respect
to any Related Judgment, each party waives any such immunity in the Specified
Courts or any other court of competent jurisdiction, and will not raise or claim
or cause to be pleaded any such immunity at or in respect of any such Related
Proceeding or Related Judgment, including, without limitation, any immunity
pursuant to the United States Foreign Sovereign Immunities Act of 1976, as
amended.

                                         -18-

<PAGE>

    17.  GENERAL PROVISIONS.

    This Agreement constitutes the entire agreement of the parties to this
Agreement and supersedes all prior written or oral and all contemporaneous oral
agreements, understandings and negotiations with respect to the subject matter
hereof.  This Agreement may be executed in two or more counterparts, each one of
which shall be an original, with the same effect as if the signatures thereto
and hereto were upon the same instrument.  This Agreement may not be amended or
modified unless in writing by all of the parties hereto, and no condition herein
(express or implied) may be waived unless waived in writing by each party whom
the condition is meant to benefit.  The Table of Contents and the Section
headings herein are for the convenience of the parties only and shall not affect
the construction or interpretation of this Agreement.

    Each of the parties hereto acknowledges that it is a sophisticated business
entity who was adequately represented by counsel during negotiations regarding
the provisions hereof, including, without limitation, the indemnification
provisions of Section 8 and the contribution provisions of Section 9, and is
fully informed regarding said provisions.  Each of the parties hereto further
acknowledges that the provisions of Sections 8 and 9 hereto fairly allocate the
risks in light of the ability of the parties to investigate the Company, its
affairs and its business in order to assure that adequate disclosure has been
made in the Registration Statement, any preliminary prospectus and the
Prospectus (and any amendments and supplements thereto), as required by the
Securities Act and the Exchange Act.

    If the foregoing is in accordance with your understanding of our agreement,
kindly sign and return to the Company the enclosed copies hereof, whereupon this
instrument, along with all counterparts hereof, shall become a binding agreement
in accordance with its terms.

                                  Very truly yours,

                                  CYBERONICS, INC.


                                  By:
                                      --------------------------------------
                                       Robert P. Cummins,
                                       President and Chief Executive Officer



    The foregoing Underwriting Agreement is hereby confirmed and accepted by
the Underwriters in San Francisco, California as of the date first above
written.

MONTGOMERY SECURITIES

PIPER JAFFRAY INC.


By MONTGOMERY SECURITIES


By:
   ------------------------------
        Richard A. Smith
      Authorized Signatory

                                         -19-

<PAGE>

                                      SCHEDULE A




UNDERWRITERS                                               NUMBER OF
                                                           COMMON SHARES

Montgomery Securities                                      [___]
Piper Jaffray Inc.                                         [___]



                                                           3,000,000

                                         -20-

<PAGE>

                                      EXHIBIT A


THE FINAL OPINION IN DRAFT FORM SHOULD BE ATTACHED AS EXHIBIT A AT THE TIME THIS
AGREEMENT IS EXECUTED.

    Opinion of Wilson Sonsini Goodrich & Rosati, counsel for the Company, to be
delivered pursuant to Section 5(e) of the Underwriting Agreement.

    References to the Prospectus in this EXHIBIT A include any supplements
thereto at the Closing Date.

         (i) The Company has been duly incorporated and is validly existing as
    a corporation in good standing under the laws of the State of Delaware.

         (ii) The Company has corporate power and authority to own, lease and
    operate its properties and to conduct its business as described in the
    Prospectus and to enter into and perform its obligations under the
    Underwriting Agreement.

         (iii) The Company is duly qualified as a foreign corporation to
    transact business and is in good standing in the State of Texas and in each
    other jurisdiction in which such qualification is required, whether by
    reason of the ownership or leasing of property or the conduct of business,
    except for such jurisdictions (other than the State of Texas) where the
    failure to so qualify or to be in good standing would not, individually or
    in the aggregate, result in a Material Adverse Change.

         (iv) The Company's subsidiary has been duly incorporated and is
    validly existing as a corporation in good standing under the laws of the
    jurisdiction of its incorporation, has corporate power and authority to
    own, lease and operate its properties and to conduct its business as
    described in the Prospectus and, to the best knowledge of such counsel, is
    duly qualified as a foreign corporation to transact business and is in good
    standing in each jurisdiction in which such qualification is required,
    whether by reason of the ownership or leasing of property or the conduct of
    business, except for such jurisdictions where the failure to so qualify or
    to be in good standing would not, individually or in the aggregate, result
    in a Material Adverse Change.]

         [(v) All of the issued and outstanding capital stock of Company's
    subsidiary has been duly authorized and validly issued, is fully paid and
    non-assessable and is owned by the Company free and clear of any security
    interest, mortgage, pledge, lien, encumbrance or, to the best knowledge of
    such counsel, any pending or threatened claim.]

         (vi) The authorized, issued and outstanding capital stock of the
    Company (including the Common Stock) conforms to the description thereof
    set forth or incorporated by reference in the Prospectus.  All of the
    outstanding shares of Common Stock have been duly authorized and validly
    issued, are fully paid and nonassessable and, to the best of such counsel's
    knowledge, have been issued in compliance with the registration and
    qualification requirements of federal and state securities laws.  The form
    of certificate used to evidence the Common Stock is in due and proper form
    and complies  with all applicable requirements of the charter and by-laws
    of the Company and the General Corporation Law of the State of Delaware.
    The description of the Company's stock option, stock bonus and other stock
    plans or arrangements, and the options or other rights granted and
    exercised thereunder, set forth or incorporated by reference in the
    Prospectus accurately and fairly presents the information required to be
    shown with respect to such plans, arrangements, options and rights.

         (vii) No stockholder of the Company or any other person has any
    preemptive right, right of first refusal or other similar right, not
    effectively satisfied or waived, to subscribe for or purchase securities of
    the Company in connection with the transactions contemplated by the
    Underwriting Agreement arising (i) by operation of the charter or by-laws
    of the Company or the General Corporation Law of the State of Delaware or
    (ii)  to the best knowledge of such counsel, otherwise.

                                         A-1

<PAGE>

         (viii) The Underwriting Agreement has been duly authorized, executed
    and delivered by, and is a valid and binding agreement of, the Company,
    enforceable in accordance with its terms, except as rights to
    indemnification thereunder may be limited by applicable law and except as
    the enforcement thereof may be limited by bankruptcy, insolvency,
    reorganization, moratorium or other similar laws relating to or affecting
    creditors' rights generally or by general equitable principles.  (In
    rendering the opinions set forth in paragraph (viii), such counsel may
    assume that the laws of the State of New York are identical to the laws of
    the State of California.)

         (ix) The Common Shares to be purchased by the Underwriters from the
    Company have been duly authorized for issuance and sale pursuant to the
    Underwriting Agreement and, when issued and delivered by the Company
    pursuant to the Underwriting Agreement against payment of the consideration
    set forth therein, will be validly issued, fully paid and nonassessable.

         (x)  [Each of] [T]he Registration Statement and the Rule 462(b)
    Registration Statement, if any, has been declared effective by the
    Commission under the Securities Act.  To the knowledge of such counsel, no
    stop order suspending the effectiveness of either of the Registration
    Statement or the Rule 462(b) Registration Statement, if any, has been
    issued under the Securities Act and no proceedings for such purpose have
    been instituted or are pending or are contemplated or threatened by the
    Commission.  Any required filing of the Prospectus and any supplement
    thereto pursuant to Rule 424(b) under the Securities Act has been made in
    the manner and within the time period required by such Rule 424(b).

         (xi) The Registration Statement, including any Rule 462(b)
    Registration Statement, the Prospectus, and each amendment or supplement to
    the Registration Statement and the Prospectus, as of their respective
    effective or issue dates (other than the financial statements and
    supporting schedules included or incorporated by reference therein or in
    exhibits to or excluded from the Registration Statement, as to which no
    opinion need be rendered) comply as to form in all material respects with
    the applicable requirements of the Securities Act and the Exchange Act.

         (xii) [Each document filed pursuant to the Exchange Act (other than
    the financial statements and supporting schedules included therein, as to
    which no opinion need be rendered) and incorporated or deemed to be
    incorporated by reference in the Prospectus complied when so filed as to
    form in all material respects with the Exchange Act.]

         (xiii)  The statements in Item 15 of the Registration Statement,
    insofar as such statements constitute matters of law, summaries of legal
    matters, the Company's charter or by-law provisions, documents or legal
    proceedings, or legal conclusions, has been reviewed by such counsel and
    fairly present and summarize, in all material respects, the matters
    referred to therein.

         (xiv) To the knowledge of such counsel, there are no legal or
    governmental actions, suits or proceedings pending or threatened which are
    required to be disclosed in the Registration Statement, other than those
    disclosed therein.

         (xv)  To the knowledge of such counsel, there are no Existing
    Instruments required to be described or referred to in the Registration
    Statement or to be filed as exhibits thereto other than those described or
    referred to therein or filed or incorporated by reference as exhibits
    thereto; and the descriptions thereof and references thereto fairly present
    and summarize in all material respects such Existing Instruments.

         (xvi) No consent, approval, authorization or other order of, or
    registration or filing with, any court or other governmental authority or
    agency, is required for the Company's execution, delivery and performance
    of the Underwriting Agreement consummation of the transactions contemplated
    thereby and by the Prospectus, except as required under the Securities Act,
    applicable state securities or blue sky laws and from the NASD.

         (xvii)  The execution and delivery of the Underwriting Agreement by
    the Company and the performance by the Company of its obligations
    thereunder (other than performance by the Company of its

                                         A-2

<PAGE>

    obligations under the indemnification section and the choice of law
    provisions of the Underwriting Agreement, as to which no opinion need be
    rendered) (i) have been duly authorized by all necessary corporate action
    on the part of the Company; (ii) will not result in any violation of the
    provisions of the charter or by-laws of the Company [or its subsidiary];
    (iii) will not constitute a breach of, or Default under, or result in the
    creation or imposition of any lien, charge or encumbrance upon any property
    or assets of the Company or its subsidiary to the best knowledge of such
    counsel, pursuant to any material Existing Instrument filed as an Exhibit
    to the Company's Annual Report on Form 10-K for the year ended June 30,
    1997 (the "10-K"); or (iv) to the knowledge of such counsel, will not
    result in any violation of any law, administrative regulation or
    administrative or court decree applicable to the Company or its subsidiary.

         (xviii) The Company is not, and after receipt of payment for the
    Common Shares will not be, an "investment company" within the meaning of
    Investment Company Act.

         (xix)  To the knowledge of such counsel, there are no persons with
    registration or other similar rights to have any equity or debt securities
    registered for sale under the Registration Statement or included in the
    offering contemplated by the Underwriting Agreement, except for such rights
    as have been duly satisfied or waived.

         (xx) To the knowledge of such counsel, neither the Company nor its
    subsidiary is in violation of its charter or by-laws or is in Default in
    the performance or observance of any obligation, agreement, covenant or
    condition contained in any material Existing Instrument filed as an Exhibit
    to the 10-K, except in such case for such violations or Defaults as would
    not, individually or in the aggregate, result in a Material Adverse Change.

      In addition, such counsel shall state that they have participated in
conferences with officers and other representatives of the Company,
representatives of the independent public or certified public accountants for
the Company and with representatives of the Underwriters at which the contents
of the Registration Statement and the Prospectus, and any supplements or
amendments thereto, and related matters were discussed and, although such
counsel is not passing upon and does not assume any responsibility for the
accuracy, completeness or fairness of the statements contained in the
Registration Statement or the Prospectus (other than as specified above), and
any supplements or amendments thereto, on the basis of the foregoing, nothing
has come to their attention which would lead them to believe that either the
Registration Statement or any amendments thereto, at the time the Registration
Statement or such amendments became effective, contained an untrue statement of
a material fact or omitted to state a material fact required to be stated
therein or necessary to make the statements therein not misleading or that the
Prospectus, as of its date or at the First Closing Date or the Second Closing
Date, as the case may be, contained an untrue statement of a material fact or
omitted to state a material fact necessary in order to make the statements
therein, in the light of the circumstances under which they were made, not
misleading (it being understood that such counsel need express no belief as to
the financial statements or schedules or other financial or statistical data
derived therefrom, included or incorporated by reference in the Registration
Statement or the Prospectus or any amendments or supplements thereto or as to
matters covered in the opinions of Wigman, Cohen, Leitner & Meyers and Hogan &
Hartson LLP delivered pursuant to Sections 5(e) and (f) of the Underwriting
Agreement).

    In rendering such opinions, such counsel may rely (A) as to matters
involving the application of laws of any jurisdiction other than the General
Corporation Law of the State of Delaware, the General Corporation Law of the
State of California or the federal law of the United States, to the extent they
deem proper and specified in such opinion, upon the opinion (which shall be
dated the First Closing Date or the Second Closing Date, as the case may be,
shall be satisfactory in form and substance to the Underwriters, shall expressly
state that the Underwriters may rely on such opinion as if it were addressed to
them and shall be furnished to the Underwriters) of other counsel of good
standing whom they believe to be reliable and who are satisfactory to counsel
for the Underwriters; and (B) as to matters of fact, to the extent they deem
proper, on certificates of responsible officers of the Company and public
officials.  [In addition, the opinions with respect to the subsidiary of the
Company covered in paragraphs (iv) and (v) may be rendered by the Company's
legal counsel in Belgium.]
                                      EXHIBIT B

                                         A-3

<PAGE>

    Opinion of Wigman, Cohen, Leitner & Meyers, patent counsel for the Company,
to be delivered pursuant to Section 5(e), to the effect that:

         (xxi) the statements in the Prospectus under the headings "Risk
    Factors -- Patents, Licenses and Proprietary Rights," and "Business --
    Patents, Licenses and Proprietary Rights," insofar as such statements
    constitute summary descriptions of the legal matters, documents or
    proceedings referred to therein, fairly present the information called
    for with respect to such legal matters, documents or proceedings;

         (xxii) to such counsel's knowledge, the Company owns or possesses all
    material patents, patent rights, licenses, inventions, copyrights, know-how
    (including trade secrets and other unpatented and/or unpatentable
    proprietary or confidential information, systems or procedures),
    trademarks, service marks and trade names currently employed by it in
    connection with its business; and to such counsel's knowledge, the Company
    has not received any notice of infringement of or conflict with (and such
    counsel knows of no infringement of or conflict with) asserted rights of
    others with respect to any such patents, licenses, trade secrets,
    trademarks, service marks or other proprietary information or materials
    which could result in any material adverse effect on the Company and to the
    knowledge of such counsel there is no infringement or violation by others
    of any of the Company's patents, licenses, trade secrets, trademarks,
    service marks or other proprietary information or materials which in the
    judgment of such counsel could materially affect the use thereof by the
    Company; and

         (xxiii) the Patents have been licensed to the Company as
    described in the Prospectus, and such licenses are valid, binding and
    enforceable; and the Company has rights to the products and technology
    covered thereby as described in the Prospectus.

                                         B-1

<PAGE>

                                      EXHIBIT C


    Opinion of Hogan & Hartson, special regulatory counsel for the Company to
be delivered pursuant to Section 5(f), to the effect that the statements in the
Prospectus under the headings "Risk Factors - Government Regulation," "Business
- - Government Regulation" and "Business -- Third-Party Reimbursement," insofar as
such statements constitute summary descriptions of the laws and regulations
administered by the United States Food & Drug Administration and the federal
laws and regulations relating to the reimbursement of health care costs have
been reviewed by such counsel and, to the best of such counsel's knowledge, are
accurate in all material respects.

                                         C-1

<PAGE>

                                      EXHIBIT D


                                   August __, 1997




Montgomery Securities
Piper Jaffray Inc.
c/o Montgomery Securities
600 Montgomery Street
San Francisco, California  94111

    Re:  Cyberonics, Inc. (the "Company")

Ladies and Gentlemen:

    The undersigned is an owner of record or beneficially of certain shares of
Common Stock of the Company ("Common Stock") or securities convertible into or
exchangeable or exercisable for Common Stock.  The Company proposes to carry out
a public offering of Common Stock (the "Offering") for which you will act as
underwriters.  The undersigned recognizes that the Offering will be of benefit
to the undersigned and will benefit the Company by, among other things, raising
additional capital for its operations.  The undersigned acknowledges that you
are relying on the representations and agreements of the undersigned contained
in this letter in carrying out the Offering and in entering into underwriting
arrangements with the Company with respect to the Offering.

    In consideration of the foregoing, the undersigned hereby agrees that the
undersigned will not, without the prior written consent of Montgomery Securities
(which consent may be withheld in its sole discretion), directly or indirectly,
sell, offer, contract or grant any option to sell (including without limitation
any short sale), pledge, transfer establish an open "put equivalent position"
within the meaning of Rule 16a-1(h) under the Securities Exchange Act of 1934,
or otherwise dispose of any shares of Common Stock, options or warrants to
acquire shares of Common Stock currently or hereafter owned either of record or
beneficially (as defined in Rule 13d-3 under Securities Exchange Act of 1934, as
amended) by the undersigned, or publicly announce the undersigned's intention to
do any of the foregoing, for a period commencing on the date hereof and
continuing through the close of trading on the date 90 days after the date of
the Prospectus.  The undersigned also agrees and consents to the entry of stop
transfer instructions with the Company's transfer agent and registrar against
the transfer shares of Common Stock or securities convertible into or
exchangeable or exercisable for Common Stock held by the undersigned except in
compliance with the foregoing restrictions.

    Notwithstanding the foregoing, (i) if the undersigned is a partnership, 
the partnership may transfer securities of the Company to a partner of such 
partnership, or to the estate of any such partner, in accordance with his or 
her pro rata interest in the partnership, and any partner who is an 
individual may subsequently transfer such shares or securities in accordance 
with clause (iii) below; (ii) if the undersigned is a corporation, the 
corporation may transfer shares to any shareholder of such corporation in 
accordance with his or her pro rata interest in the corporation and any 
shareholder who is an individual may subsequently transfer such shares or 
securities in accordance with clause (iii) below; and (iii) if the 
undersigned is an individual, he or she may transfer any shares of Common 
Stock or securities convertible into or exchangeable or exercisable for the 
Company's Common Stock either during his or her lifetime or on death by will 
be intestacy to his or her immediate family, or to a trust the beneficiaries 
of which are exclusively the undersigned and/or a member or members of his or 
her immediate family; provided, however, that in each case prior to any such 
transfer each transferee shall agree to receive and hold such shares of 
Common Stock, or securities convertible into or exchangeable or exercisable 
for the common Stock, subject to the provisions hereof, and there shall be no 
further transfer except in accordance with the provisions hereof.  For the 
purposes of

<PAGE>

Montgomery Securities
Piper Jaffray Inc.
August __, 1997
Page 2


this paragraph, "immediate family" shall mean spouse, lineal descendants,
father, mother, brother or sister of the transferor.

    With respect to the Offering only, the undersigned waives any registration
rights relating to registration under the Securities Act of any Common Stock
owned either of record or beneficially the undersigned, including any rights to
receive notice of the Offering.

    This agreement is irrevocable and will be binding on the undersigned and
the respective successors, heirs, personal representatives and assigns of the
undersigned.

    It is understood that, if you decide not to proceed with the Offering, you
will promptly upon request release us from our obligations under this Lock-Up
Agreement.  If the Underwriting Agreement (other than the provisions thereof
which survive termination) shall terminate or be terminated prior to payment for
and delivery of the Shares, this Lock-Up Agreement shall automatically terminate
concurrently with termination of the Underwriting Agreement.

    This Lock-Up Agreement shall also terminate and be of no further force or
effect in the event that the Offering contemplated by the Underwriting Agreement
is not completed on or before November 15, 1997.



- -----------------------------               ----------------------------------
Printed Name of Holder                      Printed Name of Person Signing
                                            (and indicate capacity of person
                                            signing if signing as custodian,
                                            trustee, or on behalf of an entity)

By: 
    -------------------------
    Signature

<PAGE>



                                 [Letterhead]



                                                                     EXHIBIT 5.1


                               August 15, 1997

Cyberonics, Inc.
17448 Highway 3, Suite 100
Webster, Texas  77598-4135

     RE:  REGISTRATION STATEMENT ON FORM S-3

Ladies and Gentlemen:

     We have examined the Registration Statement on Form S-3, filed by you 
with the Securities and Exchange Commission (the "Commission") on August 15, 
1997 (the "Registration Statement"), in connection with the registration 
under the Securities Act of 1933, as amended, of up to 3,450,000 shares of 
your Common Stock, par value $0.01 per share (the "Shares").  The Shares 
include an over-allotment option granted by the Company to the Underwriters 
in the offering for resale to the public as described in the Registration 
Statement.  As your counsel in connection with this transaction, we have 
examined the proceedings taken and are familiar with the proceedings proposed 
to be taken by you in connection with the sale and issuance of the Shares.

     It is our opinion that upon conclusion of the proceedings being taken or 
contemplated by us, as your counsel, to be taken prior to the issuance of the 
Shares, and upon your completion of the proceedings being taken in order to 
permit such transactions to be carried out in accordance with the securities 
laws of the various states where required, the Shares, when issued and sold 
in the manner described in the Registration Statement, will be legally and 
validly issued, fully paid and nonassessable.

     We consent to the use of this opinion as an exhibit to the Registration 
Statement, and further consent to the use of our name wherever appearing in 
the Registration Statement, including the prospectus constituting a part 
thereof, and any amendment thereto.

                                       Sincerely,

                                       WILSON SONSINI GOODRICH & ROSATI
                                       A Professional Corporation

                                       /s/ WILSON SONSINI GOODRICH & ROSATI



<PAGE>
                                  EXHIBIT 23.1
                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS
 
    As independent public accountants, we hereby consent to the use of our
report dated August 7, 1997 (and all references to our Firm) included in or made
a part of this registration statement.
 
/s/ ARTHUR ANDERSEN LLP
 
ARTHUR ANDERSEN LLP
 
Houston, Texas
 
August 15, 1997


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