THORATEC LABORATORIES CORP
10-Q, 1997-11-12
SURGICAL & MEDICAL INSTRUMENTS & APPARATUS
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<PAGE>   1
                    U. S. SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D. C. 20549
                                    FORM 10-Q


(Mark one)

[X]        Quarterly report pursuant to Section 13 or 15(d) of the Securities
           Exchange Act of 1934 for the quarterly period ended September 27,
           1997 or

[ ]        Transition report pursuant to Section 13 or 15(d) of the Securities
           Exchange Act of 1934 for the transition period
           from_______________ to_______________ 


COMMISSION FILE NUMBER:  1-8145



                        THORATEC LABORATORIES CORPORATION
- --------------------------------------------------------------------------------
        (Exact Name of Small Business Issuer as Specified in Its Charter)


           California                                 94-2340464
- --------------------------------------        -------------------------
  (State or Other Jurisdiction of                 (I.R.S. Employer 
   Incorporation or Organization)                Identification No.)


                               
       6035 Stoneridge Drive,   
       Pleasanton, California                   94588
- --------------------------------------       ------------- 
        (Address of Principal                 (Zip Code)
           Executive Offices) 
                              


Registrant's telephone number, including area code:  (510) 847-8600


           Indicate by check mark whether the registrant: (1) has filed all
reports required to be filed by Section 13 or 15(d) of the Securities Exchange
Act of 1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes X No ---------

           As of November 10, 1997, registrant had 20,162,365 shares of common
stock outstanding.







<PAGE>   2
                         PART I.  FINANCIAL INFORMATION


ITEM 1.  FINANCIAL STATEMENTS

                THORATEC LABORATORIES CORPORATION AND SUBSIDIARY

                     CONDENSED CONSOLIDATED BALANCE SHEETS
                                  (Unaudited)

<TABLE>
<CAPTION>
                                                                    September 27,       December 28, 
                                                                         1997               1996
                                                                    ------------        ------------
<S>                                                                <C>                 <C>
ASSETS
Current Assets:
Cash and cash equivalents                                           $  4,086,516        $  5,348,000
Short-term investments available for sale                              5,310,654          10,631,990
Receivables                                                            1,454,635             833,700
Inventories (Note 3)                                                   3,188,576           2,826,220
Prepaid expenses and other                                               235,594             266,519
                                                                    ------------        ------------
Total current assets                                                  14,275,975          19,906,429

Equipment and leasehold improvements, at cost                          3,028,687           2,509,099
Construction in progress                                               3,069,139             534,089
Accumulated depreciation and amortization                             (2,061,072)         (1,908,667)
                                                                    ------------        ------------
Equipment and leasehold improvements - net                             4,036,754           1,134,521
Other Assets                                                           1,450,509             929,495
                                                                    ------------        ------------
TOTAL ASSETS                                                        $ 19,763,238        $ 21,970,445
                                                                    ============        ============


LIABILITIES AND SHAREHOLDERS' EQUITY
Current Liabilities:
Accounts payable                                                    $  2,125,766        $  1,352,732
Accrued compensation                                                     834,815             527,497
Product sales advances                                                   258,885             267,128
Other                                                                    321,829             493,198
                                                                    ------------        ------------
Total current liabilites                                               3,541,295           2,640,555

Commitments

Shareholders' Equity:
Common shares, 100,000,000 authorized; issued and 
outstanding 18,153,721 in 1997 and 17,942,117 in 1996                 63,818,627          63,519,139
Paid-in capital                                                        2,481,849           2,471,877
Accumulated deficit                                                  (50,069,403)        (46,679,195)
Unrealized gain on investments - net                                         186               5,651
Cumulative translation adjustment                                         (9,316)             12,418
                                                                    ------------        ------------
Total shareholders' equity                                            16,221,943          19,329,890
                                                                    ------------        ------------
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY                          $ 19,763,238        $ 21,970,445
                                                                    ============        ============



 See notes to condensed consolidated financial statements.


                                       2

</TABLE>
<PAGE>   3

                THORATEC LABORATORIES CORPORATION AND SUBSIDIARY

                CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
                                  (Unaudited)



<TABLE>
<CAPTION>
                                            Three Months                    Nine Months
                                                Ended                          Ended
                                    ----------------------------    ----------------------------


                                    September 27,   September 28,   September 27,   September 28,
                                        1997            1996            1997            1996
                                    ------------    ------------    ------------    ------------

<S>                                <C>             <C>             <C>             <C>
Revenue:
        Product sales - net         $  2,159,034    $  2,002,117    $  6,833,411    $  5,491,356
        Interest and other income        163,146         252,209         553,637         329,739
                                    ------------    ------------    ------------    ------------


 Total revenue                         2,322,180       2,254,626       7,387,048       5,821,095



Costs and expenses:
 Costs of products sold                  874,876         747,229       2,950,123       2,387,049
 Research and development              1,141,615       1,022,571       3,455,403       2,494,096
 Selling, general and
 administrative                        1,536,987       1,157,053       4,371,730       2,689,279
 Debt conversion expense                                                                 378,295
 Interest expense                                                                         45,811 
                                    ------------    ------------    ------------    ------------
 Total costs and expenses              3,553,478       2,926,853      10,777,256       7,994,530
                                    ------------    ------------    ------------    ------------

Net loss                            $ (1,231,298)   $   (672,227)   $ (3,390,208)   $ (2,173,435)
                                    ============    ============    ============    ============



Net loss per common share           $       (.07)   $       (.04)   $       (.19)   $       (.13)
                                    ============    ============    ============    ============


Weighted average number of
Common shares outstanding             18,097,725      17,874,666      18,027,534      16,279,521
</TABLE>



    See notes to condensed consolidated financial statements.






                                       3
<PAGE>   4
                THORATEC LABORATORIES CORPORATION AND SUBSIDIARY

                CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                  (Unaudited)

<TABLE>
<CAPTION>
                                                                        Nine Months Ended
                                                                   ---------------------------- 
                                                                   September 27,   September 28,
                                                                        1997           1996
                                                                   ------------    ------------ 
<S>                                                               <C>             <C>
Cash flows from operating activities:
Net loss                                                           $ (3,390,208)   $ (2,173,435)
Adjustments to reconcile net loss to net cash used in
operating activities:
   Debt conversion                                                                      378,295
   Common stock options granted for services                              9,972          62,212
   Depreciation and amortization                                        167,862          93,918
   Changes in assets and liabilities:
         Receivables                                                   (620,935)       (609,605)
         Prepaid expenses and other                                      30,925          14,995
         Inventories                                                   (362,356)       (959,965)
         Other assets                                                  (551,783)       (796,758)
         Accounts payable and other liabilities                         420,163         971,919
                                                                   ------------    ------------ 
             Net cash used in operating activities                   (4,296,360)     (3,018,424)
                                                                   ------------    ------------ 

Cash flows from investing activities:
   Purchases of short-term investments available for sale           (66,211,706)    (47,323,236)
   Maturities of short-term investments available for sale           64,760,000      25,515,000
   Sales of short-term investments available for sale                 6,767,577      10,856,073
   Capital expenditures                                              (2,580,143)       (241,895)
                                                                   ------------    ------------ 
             Net cash provided by (used in) investing activities      2,735,728     (11,194,058)
                                                                   ------------    ------------ 
Cash flows from financing activities:
 Common stock issued in public placement - net                                       17,591,204
 Common stock issued upon exercise of warrants                                          961,739
 Common stock issued upon exercise of options                           299,148         166,368
                                                                   ------------    ------------ 
             Net cash provided by financing activities                  299,148      18,719,311
                                                                   ------------    ------------ 
Net increase (decrease) in cash and cash equivalents                 (1,261,484)      4,506,829

Cash and cash equivalents at beginning of period                      5,348,000       1,645,523
                                                                   ------------    ------------ 
Cash and cash equivalents at end of period                         $  4,086,516    $  6,152,352
                                                                   ============    ============ 
Noncash Financing Transactions:
   Conversion of notes into common stock                           $               $  1,675,000
Noncash Investing Transactions:
   Construction costs in accounts payable                          $    767,001    $
Other Cash Flow Information:
   Interest paid                                                   $               $     45,811
</TABLE>


 See notes to condensed consolidated financial statements.






                                       4
<PAGE>   5
                THORATEC LABORATORIES CORPORATION AND SUBSIDIARY

              NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                  (Unaudited)

1.       BASIS OF PRESENTATION

         The interim consolidated financial statements presented have been
         prepared by Thoratec Laboratories Corporation (the Company) without
         audit and, in the opinion of management, reflect all adjustments
         necessary (consisting only of normal recurring adjustments) to present
         fairly the financial position, results of operations and cash flows at
         September 27, 1997 and for all periods presented.  The results of
         operations for any interim period are not necessarily indicative of
         results for a full year.

         The consolidated balance sheet presented as of December 28, 1996, has
         been derived from the consolidated financial statements that have been
         audited by the Company's independent auditors.  The consolidated
         financial statements and notes are presented as permitted by the
         Securities and Exchange Commission and do not contain certain
         information included in the annual consolidated financial statements
         and notes of the Company.  It is suggested that the accompanying
         condensed consolidated financial statements be read in conjunction
         with the audited consolidated financial statements and the notes
         thereto contained in the Company's Annual Report on Form 10-K for the
         fiscal year ended December 28, 1996, filed with the Securities and
         Exchange Commission.

         The preparation of the Company's consolidated financial statements in
         conformity with generally accepted accounting principles necessarily
         requires management to make estimates and assumptions that affect the
         reported amounts of assets and liabilities and disclosure of
         contingent assets and liabilities at the consolidated balance sheet
         dates and the reported amounts of revenues and expenses for the
         periods presented.


2.       RECENTLY ISSUED ACCOUNTING STANDARD

         In February 1997, the Financial Accounting Standards Board (FASB)
         issued Statement of Financial Accounting Standards No. 128, "Earnings
         per Share" (SFAS 128).  The Company is required to adopt SFAS 128 in
         the fourth quarter of fiscal 1997 and will restate at that time
         earnings per share (EPS) data for prior periods to conform with SFAS
         128.  Earlier application is not permitted.  SFAS 128 replaces current
         EPS reporting requirements and requires a dual presentation of basic
         and diluted EPS.  Basic EPS excludes dilution and is computed by
         dividing net income available to common shareholders by the weighted
         average number of common shares outstanding during the period.
         Diluted EPS reflects the potential dilution that could occur if
         securities or other contracts to issue common stock were exercised or
         converted into common stock.  If SFAS 128 had been in effect during
         the current and prior periods, basic EPS and diluted EPS would not
         have been significantly different than primary EPS and fully diluted
         EPS currently reported for the periods.  Fully diluted EPS, as with
         diluted EPS, is not reported due to its antidilutive effect on EPS.

         During June 1997, the FASB issued Statements of Financial Accounting
         Standards No. 130, "Reporting Comprehensive Income,"  which requires
         that an enterprise report the change in its net





                                       5
<PAGE>   6

         assets from nonowner sources by major components and as a single
         total.  The FASB also issued Statements of Financial Accounting
         Standards No. 131, "Disclosures about Segments of an Enterprise and
         Related Information," which establishes annual and interim standards
         for an enterprise's operating segments and related disclosures about
         its products, services, geographic areas, and major customers.
         Adoption of these Statements will not impact the Company's
         consolidated financial position, results of operations or cash flows,
         and any effect will be limited to the form and content of its
         disclosures.  Such Statements are effective for fiscal years beginning
         after December 15, 1997, with earlier application permitted.



3.       INVENTORIES

                 Inventories consist of the following:



<TABLE>
<CAPTION>
                                                 September 27,    December 28,
                                                     1997             1996
                                                  ----------       ----------
                            <S>                   <C>              <C>   
                            Finished goods        $1,409,095       $1,639,444

                            Work in process          790,290          648,622

                            Raw materials            989,191          538,154
                                                  ----------       ----------

                            Total                 $3,188,576       $2,826,220
                                                  ==========       ==========
</TABLE>


4.       SUBSEQUENT EVENTS

         In October 1997, the Company executed an agreement with Arrow
         International, Inc. ("Arrow") to supply mechanical valves for the VAD
         System for a four-year term.

         On November 10, 1997, subsequent to the end of the nine-month interim
         period the Company sold, through a registered direct public offering,
         3,000,000 shares of common stock at $5.00 per share, including
         1,000,000 shares from a selling shareholder.  Net cash proceeds
         received by the Company were approximately $8,900,000.  Agent
         commissions and approximately $450,000 of other estimated expenses
         will be recorded as an offset to common stock at the closing of the
         offering.





                                       6
<PAGE>   7
ITEM 2.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND 
         RESULTS OF OPERATION


Liquidity and Capital Resources

At the end of the third quarter of 1997 the Company had working capital of
$10,735,000 compared with $17,266,000 at the end of 1996.  The decrease in
working capital was due primarily to planned expenditures related to the
construction of the Company's new manufacturing facility.  In addition, ongoing
operations contributed to the decrease in working capital.  Receivables
increased principally as a result of higher sales in September compared to
December.  Prepaid expenses and other decreased primarily from amortization of
insurance premiums partially offset by increased prepaid rent.  Other assets
increased primarily due to additional deposits related to the new building
lease.  Accounts payable and accrued liabilities increased as a result of
higher balances from capital asset construction, research and development
consulting and other normal operating items.

On November 10, 1997, subsequent to the end of the nine-month interim period
the Company sold, through a registered direct public offering, 3,000,000 shares
of common stock at $5.00 per share, including 1,000,000 shares from a selling
shareholder.  Net cash proceeds received by the Company were approximately
$8,900,000.   Agent commissions and approximately $450,000 of other estimated
expenses will be recorded as an offset to common stock at the closing of the
offering.  While the Company believes that with the proceeds of this offering
and cash, cash equivalents and short-term investments of $9,400,000 at
September 27, 1997 it has sufficient funds for its current business plan for at
least the next twelve months, it expects that its operating expenses will
increase in future periods as the Company expends increased amounts on product
manufacturing and marketing and on research and development.  As a result, the
Company expects to incur net losses for at least the next year.  There can be
no assurance that the Company will achieve profitability or positive cash flow.

The Company does not expect that inflation will have a material impact on its
operations.

Results of Operations

Fiscal Quarters Ended September 27, 1997 and September 28, 1996

Product sales in the third quarter of 1997 were approximately $2,159,000
compared to $2,002,000 in the third quarter of 1996.  The $157,000, or 8%,
increase is primarily the result of increased sales of the Company's VAD System
in the United States, the establishment of a domestic sales and marketing
organization in 1996, and an increase in the number of hospitals using the
Company's VAD System.  Partially offsetting this increase is a decrease in
European VAD sales of $125,000 in the third quarter of 1997 compared to the
third quarter of 1996. In February 1997, the Company notified its largest
European VAD products distributor that it intended to expand its marketing
efforts in Europe and begin distributing its VAD products directly to
hospitals. Accordingly, the distribution agreement between the Company and this
distributor was terminated effective July 1997.  In June 1996, the Company
implemented a rental program whereby hospitals can rent certain of the
Company's products on a short-term basis.  Rental income in the third quarter
of 1997 was approximately $82,000 compared to $113,000 in the third quarter of
1996.  Interest and other income decreased approximately $89,000 to $163,000
due principally to lower





                                       7
<PAGE>   8

cash balances from operating uses and capital expenditures. Cost of sales in
1997 increased $128,000, or 17%, as a result of higher sales volume and costs
incurred to expand the Company's manufacturing capabilities.  Gross margins
decreased from 63% in 1996 to 59% in 1997 due in large part to costs incurred
to expand the Company's manufacturing capabilities partially offset by higher
average unit selling prices for the VAD pumps and cannulae.  Research and
development expenses for the third quarter of 1997 increased $119,000, or 12%,
compared to the third quarter of 1996 due to increased costs associated with
the development of the Company's portable VAD driver, the TLC-II, and its graft
products.  Selling, general and administrative expenses in the third quarter of
1997 increased $380,000, or 33%, compared to the third quarter of 1996, due to
expanded domestic and international marketing and sales efforts, including
costs associated with going direct in Europe and general support needed for
expected growth, including increased personnel.  This was partially offset by
decreases in general corporate and patent legal expenses.

Nine Months Ended September 27, 1997 and September 28, 1996

Product sales in the first nine months of 1997 were approximately $6,833,000
compared to $5,491,000 in the first nine months of 1996.  The $1,342,000, or
24%, increase is primarily the result of increased sales of the Company's VAD
System in the United States, the establishment of a domestic sales and
marketing organization in 1996, and an increase in the number of hospitals
using the Company's VAD System.  Partially offsetting this increase is a
decrease in European VAD product sales of $717,000 in the first nine months of
1997 compared to the first nine months of 1996.  In February 1997, the Company
notified its largest European VAD products distributor that it intended to
expand its marketing efforts in Europe and begin distributing its VAD products
directly to hospitals.  Accordingly, the distribution agreement between the
Company and this distributor was terminated effective July 1997.  In June 1996,
the Company implemented a rental program whereby hospitals can rent certain of
the Company's products on a short-term basis.  Rental income in the first nine
months of 1997 was approximately $321,000 compared to $119,000 in the first
nine months of 1996.  Interest and other income increased approximately
$224,000 to $554,000 due to higher cash balances, primarily as a result of
proceeds received from the Company's public stock offering in July 1996.  Cost
of sales in 1997 increased $563,000, or 24%, as a result of higher sales
volume.  Gross margins overall have not changed significantly from 1996 to
1997.  Increased average selling prices of many of the Company's products
contributed to higher margins.  However, offsetting this increase was higher
volume sales in 1997 of lower margin drivers and increased costs in 1997 to
expand the Company's manufacturing capabilities.  Research and development
expenses for the first nine months of 1997 increased $961,000, or 39%, compared
to the first nine months of 1996 due to increased costs associated with the
development of the Company's portable VAD driver, the TLC-II, and its graft
products.  Selling, general and administrative expenses in the first nine
months of 1997 increased $1,682,000, or 63%, compared to the first nine months
of 1996, due to expanded domestic and international marketing and sales
efforts, including costs associated with going direct in Europe, investor
relations and annual report preparation, and general support needed for
expected growth, including increased personnel.  There was no debt conversion
expense or interest expense in the first nine months of 1997 because all
$1,675,000 of convertible notes issued in 1994 were converted into common stock
in the first quarter of 1996.

Forward-Looking Statements

The portions of this report that relate to future plans, events or performance
are forward-looking statements.  Investors are cautioned that all such
statements involve risks and uncertainties, including





                                       8
<PAGE>   9

announcements by the Company's competitors, risks related to the government
regulatory approval processes, delays in facility construction, delays in
product development and new product introductions, rapidly changing technology,
an intensely competitive market, market acceptance of new products,
relationships with foreign distributors, reimbursement policies and general
economic conditions.  These factors, and others, are discussed more fully in
the Company's prospectus dated November 5, 1997 and the Company's other filings
with the Securities and Exchange Commission.  Actual results, events or
performance may differ materially.  Readers are cautioned not to place undue
reliance on these forward-looking statements, which speak only as of the date
hereof.  The Company undertakes no obligation to publicly release the result of
any revisions to these forward-looking statements that may be made to reflect
events or circumstances after the date hereof or to reflect the occurrence of
unanticipated events.























                                       9
<PAGE>   10
                          PART II.  OTHER INFORMATION


ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

   (a)   Exhibits required by Item 601 of Regulation S-K

         See Exhibit Index on the page immediately preceding exhibits.

   (b)   Reports on Form 8-K


































                                       10
<PAGE>   11

                                   SIGNATURES



In accordance with the requirements of the Exchange Act, the registrant caused
this report to  be signed on its behalf by the undersigned, thereunto duly
authorized.



                                    THORATEC LABORATORIES CORPORATION



Date:    November 11, 1997                    /s/ D. Keith Grossman
     -------------------------      ------------------------------------------
                                    D. Keith Grossman, Chief Executive Officer



Date:    November 11, 1997                    /s/ Cheryl D. Hess
     -------------------------      ------------------------------------------
                                    Cheryl D. Hess, Chief Financial Officer

















                                       11
<PAGE>   12

                                  EXHIBIT INDEX



      Exhibit Number                        Document

          10                  Second Amendment to Lease Agreement Originally By
                              and Between Main Street Associates and Thoratec
                              Laboratories Corporation Dated as of July 25, 1996

          11                  Statement Re: Computation of Per-Share Earnings

          27                  Financial Data Schedule

























                                       12

<PAGE>   1
                            SECOND AMENDMENT TO LEASE


        THIS SECOND AMENDMENT TO LEASE ("Second Amendment"), is entered into as
of May 15, 1997, by and between Main Street Associates, a California general
partnership ("Main Street") and EJC Partners, L.P., a California limited
partnership ("EJC Partners", and collectively with Main Street, hereinafter
referred to as "Landlord"), and Thoratec Laboratories Corporation, a California
corporation ("Tenant").

                                   BACKGROUND

        A. Main Street and Tenant are the original parties to that certain Lease
Agreement dated July 25, 1996 (the "Original Lease"). Each initially capitalized
term used without definition in this Amendment shall have the meaning given to
such term in the Original Lease. Landlord and Tenant have entered into a First
Amendment of Lease ("First Amendment") as of January 15, 1997.

        B. EJC Partners has heretofore acquired from Main Street an undivided
fee interest as tenant-in-common with Main Street in the Parcel (and the
Building which is in the process of being constructed thereon) which is the
subject of the Original Lease, 


<PAGE>   2
and accordingly has also succeeded to a portion of the interest of Main Street
as the Landlord under the Original Lease.

        C. Landlord and Tenant now desire to amend certain of the terms and
conditions set forth in the Original Lease (which together with the amendments
made herein and the First Amendment shall be hereinafter referred to as the
"Lease") as more fully described herein.

        NOW, THEREFORE, IN CONSIDERATION of the mutual covenants and promises
contained herein, the parties to this Amendment hereby agree as follows:

        1. SUBSTANTIAL COMPLETION DATE OF BUILDING SHELL. The parties hereto
agree that the date of Substantial Completion of the building shell for purposes
of Paragraph 2(F) of Exhibit C to the Original Lease is April 15, 1997, and the
Rental Commencement Date is therefore August 15, 1997, provided however, for
purposes of preparation of punch lists and commencement of the one year
construction defects warranty of Landlord/Tioga Construction Incorporated as
reflected in Paragraph 9 of Exhibit C to the Lease, the date shall be June 17,
1997.

        2. EXCESS LANDLORD IMPROVEMENT COSTS. Subject to any downward adjustment
in the same that may hereafter result from any exercise of the tenant's right to
audit the books and records of 


                                       2


<PAGE>   3
Landlord and Contractor as defined in Paragraph 11 of Exhibit C to the Original
Lease, the Excess Landlord Improvement Costs as defined in Paragraph 2(K) of
Exhibit C to the Original Lease, and payable pursuant to Paragraph 12(B) of
Exhibit C to the Original Lease, is agreed by Landlord and Tenant to equal
$350,000.00 (including a $95,673.88 portion of the stated $187,597.78 cost of
constructing certain additional improvements to the Building as listed under
code numbers 8 through 25, inclusive, on Exhibit F attached hereto (the "Special
Tenant Improvements"), which Special Tenant Improvements have been heretofore
constructed by Landlord and its affiliate, Tioga Construction Incorporated. In
addition to the foregoing, and concurrently with the execution of this Second
Amendment, Tenant shall pay to Landlord the sum of $91,923.90 relating to the
Landlord's represented excess cost of constructing the Special Tenant
Improvements (above the $95,673.88 portion included in Excess Landlord
Improvement Costs pursuant to the preceding sentence), which amount shall for
purposes of this Lease not be considered as part of the Landlord Improvement
Costs or Excess Landlord Improvement Costs. Landlord agrees that Tenant's audit
rights as described in Paragraph 11 of the Lease shall extend to auditing the
cost of construction of the Special Tenant Improvements. The one hundred eighty
day period for Tenant 


                                       3


<PAGE>   4
to audit the Landlord Improvement Costs shall not commence to run until Landlord
has completed all punch list work and has paid in full all contractors,
subcontractors and suppliers and has updated and delivered to Tenant "its final
and detailed accounting". Landlord shall exercise due diligence to cause all of
the items reflected on the current punch list dated July 8, 1997 ( a copy of
which is attached hereto as Exhibit G) to be fully remedied in a manner
reasonably acceptable to Tenant by September 15, 1997 and to cause such "final
and detailed accounting" reflecting all contractors, subcontractors, and
suppliers to have been fully paid and appropriate liens releases obtained and
copies delivered to Tenant by December 31, 1997, and if for any reason the same
cannot be accomplished by such date, Landlord shall exercise due diligence to
cause the same to be accomplished by the earliest possible date thereafter.
Landlord acknowledges that the amounts provided to be paid by Tenant in
increased rent and cash as provided above constitute the entirety of Tenant's
financial obligation for all work which has heretofore been performed or
contracted to be performed by or at the direction of either Landlord or Tioga
Construction Incorporated relating to the Premises, including, but not limited
to, with respect to any Landlord Improvement Work or any Special Tenant
Improvements, and 


                                       4


<PAGE>   5
including any outstanding punch list work. Landlord agrees that it shall defend,
indemnify and hold Tenant and Tenant's interest in the Premises free and
harmless from and against any claims or causes of action (including, but not
limited to, any mechanics' liens) which may now or hereafter arise out of or be
associated with either the Landlord Improvement Work or any Special Tenant
Improvements, including, but not limited to, the subsequent cost or performance
by any contractor, subcontractor or supplier of any punch list work.

        3. TENANT'S ELECTION WITH RESPECT TO PAYMENT OF EXCESS LANDLORD
IMPROVEMENT COSTS. Tenant hereby elects to pay the Excess Landlord Improvement
Costs by increasing the amount of rent by one percent per month, amounting to a
rental increase of $3,500.00 per month.

        4. REVISION OF TENANT IMPROVEMENT PLANS. Paragraph 5D of Exhibit C to
the Lease is acknowledged by Landlord and Tenant to be deleted in its entirety
from the Lease. Tenant shall have the unilateral right to revise its Tenant
Improvement Plans to reflect approximately 24,000 square feet or more of office
and office related support facilities to be built out as "Phase I Tenant
Improvements" (with the remainder of any future Tenant Improvements being
referred to generally as "Phase II Tenant 


                                       5


<PAGE>   6
Improvements"). Tenant shall submit to Landlord, for its review, revised Tenant
Improvement Plans for the Phase I Tenant Improvements on or before August 15,
1997. Tenant agrees to commence construction thereafter with reasonable
diligence after approval by all parties and obtaining any required governmental
approval to the revised plans for Phase I Tenant Improvements. If in order to
obtain an occupancy permit for Phase I Tenant Improvements, any additional work
in the nature of Tenant Improvements is required to any portion of the Phase II
portion of the Premises, Tenant shall be responsible for the same (but such
obligation of Tenant shall not extend to any work required to correct any punch
list items or any items which are part of the Landlord Improvements or the
Special Tenant Improvements or which are otherwise the obligation of Landlord or
Tioga Construction Incorporated under the provisions of this Lease or the
Construction Contract or the acknowledgment to be delivered by Tioga
Construction Incorporated pursuant to Paragraph 7 hereof). Tenant shall have no
obligation to design Phase II Tenant Improvements at this time or at any time,
and the provisions of Paragraph 10 of the Lease shall apply to such later
construction of any Tenant Improvements of the Phase II portion of the Premises
(which itself, may similarly be constructed in more than one 


                                       6


<PAGE>   7
phase). Landlord acknowledges, that as provided in Paragraph 10 of the Lease,
Landlord shall not unreasonably withhold its approval to the Phase I Tenant
Improvements or the Phase II Tenant Improvements (or any phase of the Phase II
Tenant Improvements that Tenant may from time to time submit).

        5. INCREASED TENANT SECURITY DEPOSIT. Concurrently with the execution
hereof, Tenant shall deposit with Landlord cash in the amount of Five Hundred
Thousand Dollars ($500,000.00) or an unconditional irrevocable standby letter of
credit in favor of Landlord in a like amount (hereinafter "Increased Deposit").
For so long as the Security Deposit or the Increased Security Deposit is held by
Landlord in the form of cash (rather than in the form of a letter of credit),
Landlord shall cause a $750,000 portion of such Security Deposit and all of the
Increased Security Deposit to be held in a certificate of deposit account at
either Civic Commerce Bank or Bank of America in the manner described generally
in Paragraph 40 of the Lease with all interest earned thereon to be for the
account and benefit of Tenant. While Tenant shall have the right as provided in
the Lease (including this Second Amendment) to substitute a letter of credit for
all or a portion of the cash Security 


                                       7


<PAGE>   8
Deposit or Increased Security Deposit, Tenant shall not be required at any time
to replace any cash Security Deposit or Increased Security Deposit with a letter
of credit. At such time as Tenant has built-out Phase II Tenant Improvements and
has received an occupancy permit for the same covering at least 80% of the net
rentable square feet in the Premises, and Tenant shall have submitted to
Landlord documentation reasonably demonstrating that (i) Tenant has expended in
the aggregate at least Five Million Dollars ($5,000,000.00) on leasehold
improvements to the Premises (including any expenditures preceding the date of
this Second Amendment) as reasonably defined and determined by Tenant in
accordance with generally accepted accounting principles and (ii) either (a) the
period for filing any mechanics' liens has expired without any liens then
existing of record, (b) Tenant has obtained appropriate lien releases from all
contractors, subcontractors and suppliers associated with such work, or (c)
Tenant has otherwise reasonably demonstrated that the entire cost of such work
has been fully paid by Tenant, then the Increased Deposit shall be returned to
Tenant provided that if at such time as Tenant is otherwise entitled to receive
the return of the Increased Deposit, an uncured Event of Default shall exist
under this Lease, then Landlord shall be entitled to retain such Increased
Deposit until such time as the Event of Default is cured. If Tenant has
built-out Tenant Improvements and has 


                                       8


<PAGE>   9
received an occupancy permit for at least 80% of the net rentable square feet in
the Premises but has not submitted the documentation required above
demonstrating that Tenant has expended in the aggregate at least Five Million
Dollars ($5,000,000.00) on leasehold improvements to the Premises (including any
expenditures preceding the date of this Second Amendment), but shall submit
documentation to Landlord reasonably demonstrating that Tenant has expended in
the aggregate at least Four Million Dollars ($4,000,000.00) on leasehold
improvements to the Premises (including any expenditures preceding the date of
this Second Amendment), and demonstrates the satisfaction of clause (ii) above
as to the lien-free nature of such work, then Landlord shall return to Tenant
Two Hundred and Fifty Thousand Dollars ($250,000.00) of the Increased Deposit
provided that if an uncured Event of Default shall then exist under this Lease,
then Landlord shall be entitled to retain such portion of the Increased Deposit
until such time as the Event of Default is cured. If Tenant subsequently expends
additional amounts on leasehold improvements so that the then aggregate expended
by Tenant on leasehold improvements is at least equal to Five Million Dollars
($5,000,000.00), then the remaining Two Hundred Fifty Thousand Dollars
($250,000.00) of the Increased Deposit shall be returned 


                                       9


<PAGE>   10
to Tenant provided that if an uncured Event of Default shall then exist under
this Lease, then Landlord shall be entitled to retain such remaining portion of
the Increased Deposit until such time as the Event of Default is cured.

        6. INDEMNITIES; COMPLETION BOND. Tenant agrees upon request of the title
company with respect to any financing occurring during the course of
construction of either the Phase I Tenant Improvements or the Phase II Tenant
Improvements, to sign an appropriately completed Indemnity Agreement (Mechanics'
Liens) in substantially the form attached hereto as Exhibit H, indemnifying the
title company issuing title insurance with respect to any Landlord permanent
financing encumbering the Premises against mechanics' liens relating to any
Tenant Improvement work then being performed by or at the request of Tenant.
Tenant agrees that Landlord shall be a third party beneficiary of the covenants
of Tenant in Paragraphs 4 and 5 of such Indemnity Agreement and shall have the
right to enforce such covenants directly against Tenant. Tenant further agrees
that if the title company or the permanent lender shall require the same of
Landlord, Landlord shall in such event have the right to require Tenant to
obtain from its general contractor then performing the work of constructing the
Phase I Tenant 


                                       10


<PAGE>   11
Improvements, a Completion Bond insuring the lien free completion of the Phase I
Tenant Improvements for the amount agreed in the construction contract between
such contractor and Tenant.

        7. TIOGA CONSTRUCTION INCORPORATED ACKNOWLEDGMENTS. Prior to or
concurrently with the execution of this Second Amendment, Landlord shall cause
(A) a full and complete executed copy of the construction contract between
Landlord and Tioga Construction Incorporated (the "Construction Contract") to be
delivered to Tenant and (B) Tioga Construction Incorporated to acknowledge in
writing to Tenant in form reasonably acceptable to Tenant that Tioga
Construction Incorporated agrees (i) that Tenant is a third party beneficiary of
the Construction Contract (with the right to directly enforce any contractor's
covenants, representations or warranties thereunder) as contemplated by
Paragraph 6.F of Exhibit C of the Lease, (ii) that the construction warranties
of Tioga Construction Incorporated shall extend to the Special Tenant
Improvements and such warranties as to both the Landlord Improvement Work and
the Special Tenant Improvements shall remain in full force and effect for the
one-year period described in Paragraph 9 of Exhibit C to the Lease as modified
by Paragraph 1 of this Second Amendment (which has such one-year period
beginning on June 17, 1997), (iii) that Tioga Construction Incorporated 


                                       11


<PAGE>   12
shall be bound by and shall cooperate with Tenant's audit rights as described in
Paragraph 11 of Exhibit C to the Lease as modified by this Second Amendment
(including Tenant's rights to audit the cost of the Special Tenant
Improvements), (iv) that neither Tioga Construction Incorporated, nor any
subcontractors or suppliers working for or under it, have any claims against
Tenant for any unpaid cost of any work performed on or about the Premises
(including, but not limited to, any work associated with any Landlord
Improvements or any Special Tenant Improvements), and (v) to cause all of the
matters reflected on the existing punch list dated July 8, 1997 to be fully and
expeditiously remedied at no cost to Tenant and to cause any work performed by
it or at its direction to conform to the current requirements of law if changes
thereto are subsequently required by any building inspectors or the like. Tenant
shall not be liable for any additional costs or amounts above the amounts agreed
to above that may be later discovered or incurred by either Landlord or Tioga
Construction Incorporated with respect to the Landlord Improvements or the
Special Tenant Improvements, including but not limited to, any costs that may be
incurred in correcting any punch list items or in causing any of such
improvements to comply fully with currently 


                                       12


<PAGE>   13
applicable law and the requirements or any building inspector or similar
governmental authority.

        8. WAIVERS OF CERTAIN CLAIMS. Tenant hereby waives any claims against
Landlord associated with any delay in Landlord's construction of the Landlord
Improvements, including any entitlement under the Lease to delay the Rental
Commencement Date. Landlord hereby waives any claims against Tenant associated
with Tenant's performance or non-performance of its obligations with respect to
the design or construction of the Landlord Improvements, Tenant Improvements or
Special Tenant Improvements, including any delay in pursuing such construction
or in paying for the costs of such construction. Landlord and Tenant
respectively represent to each other that they are not aware of any breach or
default by the other in the performance of any of their obligations under the
Lease

        9. EXECUTION IN COUNTERPARTS AND BY FAX. Landlord and Tenant agree that
this Second Amendment may be executed in counterparts by the respective parties
hereto, and that once fully executed and delivered by all of the parties hereto,
shall constitute a single agreement binding upon all the parties. Any party may
execute and forward a facsimile copy of this Second Amendment which shall be
binding upon such party, but such party 


                                       13


<PAGE>   14
shall be obligated to subsequently forward to the other party an original signed
version of this Second Amendment.

        IN WITNESS WHEREOF, the parties have executed this Second Amendment to
Lease on the day and year set forth opposite their signatures hereinbelow.

LANDLORD:


MAIN STREET ASSOCIATES, a California general partnership
Tenant-in-Common


By:   /s/ Steven P. Thomas          Dated:  July __, 1997
   -------------------------------
   Steven P. Thomas, Managing General Partner


By:     The Bailey Revocable Trust Dated June 24, 1993, General Partner

        By:  /s/ Robert J. Bailey          Dated: July __, 1997
           -------------------------------
        Robert J. Bailey, Co-Trustee under the Bailey Revocable Trust 
        Dated June 24, 1993



        By:  /s/ Adele B. Bailey           Dated:  July 19, 1997
           -------------------------------
        Adele B. Bailey, Co-Trustee under the Bailey Revocable Trust 
        Dated June 24, 1993


                                       14


<PAGE>   15
EJC PARTNERS, L.P., a California Limited partnership
Tenant-in-Common

By:  /s/ John F. Miller             Dated:  July 21, 1997
   -------------------------------

   John F. Miller, Trustee of the Survivor's Trust established by Cashin 1990 
   Trust, General Partner

By:  /s/ John F. Miller             Dated:  July 21, 1997
   -------------------------------

   John F. Miller, Trustee of the Residual Balance Trust established by Cashin 
   1990 Trust, General Partner



TENANT:

THORATEC LABORATORIES CORPORATION,
a California corporation


By: /s/ Cheryl Hess                 Dated:  July ___, 1997
   -------------------------------
   Its: V.P. Finance
        --------------------------



                                       15
<PAGE>   16
                                   EXHIBIT F

<TABLE>
<CAPTION>                                                           
                                                                                                  May 19, 1997
         
                                                            Thoratec
        
                                                            Building Cap Cost

         
Code                                                        Item Cost           OH&P               Total
<S>       <C>                                            <C>                                     <C>
          Basic Shell Cap                                $2,100,000.00                           $2,100,000.00
          Additional Approx. 4500 a.f. added to cap        $163,643.26                             $163,643.26
                                                         -----------------------------------------------------
          Building Cap Cost                              $2,263,643.26                           $2,263,643.26
                                                         =====================================================

          Over Standard Shell Improvements
          Per Lease
  1       HVAC Support                                      $35,800.00          $5,370.00           $41,170.00
  2       Electric Service Upgrade 2000 to 3000amp          $24,537.27          $3,680.59           $28,217.86
  3       Water Service Upgrade                             $22,615.00          $3,392.25           $26,007.25
  4       Rebar at 18" Grid VS 24" Grid                      $5,000.00            $750.00            $5,750.00
  5       Fire Hydrant                                      $11,388.00          $1,708.20           $13,096.20
  6       Structural Roof Changes                           $11,794.00          $1,769.10           $13,563.10
  7       Architectural Services                             $9,550.00          $1,432.50           $10,982.50
                                                         -----------------------------------------------------
          Total Over Standard                              $120,584.27         $18,102.54          $138,786.91
          Not in Lease
  8       Containment Tank                                  $23,000.00          $3,450.00           $26,450.00
  9       Domestic Water                                     $2,463.00            $369.45            $2,832.45
 10       Loading Dock Cover                                $24,597.00          $3,689.55           $28,286.55
 11       Relocate Fire Line to Interior                       $644.00             $96.60              $740.60
 12       Electronic Door Hardware                           $7,133.00          $1,069.95            $8,202.95
 13       Architectural Services                            $19,445.00          $2,916.75           $22,361.75
 14       Skylights                                          $7,029.00          $1,054.35            $8,083.35
 15       Decorative Concrete                               $17,000.00          $2,550.00           $19,550.00
 16       Sump Pump                                            $350.00             $52.50              $402.50
 17       2 Monument signs                                  $12,000.00          $1,800.00           $13,800.00
 18       Enlarged Mechanical Enclosure (skin)               $4,600.00            $690.00            $5,290.00
 19       Generator Wall                                     $5,833.00            $874.95            $6,707.95
 20       Low Pole Lights                                    $9,500.00          $1,425.00           $10,925.00
 21       TI Roofing                                         $7,416.00          $1,112.40            $8,528.40
 22       Water Proof Containment Tank                       $7,426.00          $1,113.90            $8,539.90
 23       Truck Ramp Sealcrate                                 $367.50             $55.13              $422.63
 24       Mow Band                                          $12,100.00          $1,815.00           $13,915.00
 25       Landscape Architect                                $2,225.00            $333.75            $2,558.75
                                                         -----------------------------------------------------
          Total Not in Lease                               $163,128.50         $24,469.28          $187,597.78
                                                         =====================================================
          Total Cap. Overstandard Not in Lease           $2,547,456.03         $42,571.92        $2,590,027.95


          Project Budget 11/21/96                        $2,335,166.55

          Building Cap Cost                              $2,263,643.26
          Amount Not in Lease                              $187,597.78
          Overstandard                                     $138,786.91
                                                         -------------
          Total Cap. Overstandard Not in Lease           $2,590,027.95
          Variance Overage                                 $115,539.21
                                                         -------------
          Total cost as of April 23, 1997                $2,705,567.16
          Less Building Cap Cost                        ($2,263,643.26)
                                                         -------------
          Total Due Main Street Associates                 $441,923.90
</TABLE>

<PAGE>   17
                                                                     EXHIBIT "G"



                       [THORATEC LABORATORIES LETTERHEAD]


July 08, 1997

Tioga Construction                              VIA Fax: 510-945-8753
Mr. Dave Thomas
3100 Oak Road, Suite 215
Walnut Creek, CA. 94596

RE: 6035 Stoneridge Drive, Pleasanton, CA.

Dear Dave,

I have revised the punch list items from our walk-thru. I would like to have a
completion schedule from Tioga for the open items. The main areas of concern
referenced from the walk through list dated June 20, 1997 are as follows:

1st Floor

1    Holes filled in concrete floor from tilt up supports

5    Weather stripping missing on all outside doors at bottom of door to
     threshold

6    Large crack in floor slab extending to outside walk strip at west end
     storefront. Structural engineer to determine action to be taken.

17   Elevator mechanical room, electrical conduit and hydraulic lines not sealed
     at wall

Exterior

1    Exterior paint is peeling and bubbling in various places on the exterior.

2    Outside columns at lobby are very rough in finish, panel and corner seals
     very rough, paint coverage inconsistent.

3    Monument signs are rough in finish and paint coverage is inconsistent

4    Rainwater leaders not painted to match building color

5    Power wash front entrance area.

11   Patch chips in concrete curbing.

14   Employee benches not installed.

Thoratec would like to meet with you at the job site to discuss completion of
these outstanding items.

Sincerely,

/s/ STEVEN GOTTLIEB
- -------------------
Steven Gottlieb
Thoratec Laboratories
<PAGE>   18
                                                                       EXHIBIT H


                                                      FILE NO: _____ _____ _____

                                        OWNER'S POLICY AMOUNT: _________________

                                    MORTGAGEE'S POLICY AMOUNT: _________________

                                               RECORDING DATE: _________________

                              INDEMNITY AGREEMENT
                               (MECHANICS' LIENS)


Between _______________________________________________________________________
____________________________________ hereinafter "Indemnitor", and FIDELITY
NATIONAL TITLE INSURANCE COMPANY, an Arizona corporation, hereinafter "Company".

1.   This Agreement covers real property in the County of _____________________,
State of ________________________, described as:






The above real property will hereinafter be referred to in this Agreement as the
"property".

2.   Certain works of improvement have been or will be commenced upon said
property and/or for benefit thereof, indemnitor hereby represents to Company
that all costs, charges, expenses and bills for labor, material, and services
for or in connection with all such works of improvement will be paid before the
expiration of the respective times for filing of Claims of Lien arising out of
such works of improvement.

3.   Indemnitor, whether as owner or part owner of, or having an interest in
said property, or as a contractor for a work of improvement thereon, or part of
such work of improvement, or otherwise, has an interest in the issuance of and
desires Company, from time to time to issue its policy or policies of title
insurance, or endorsements thereto, now and in the future, covering said
property or lots or portions thereof, insuring the same as being free of
mechanic's or materialman's liens, arising out of such works of improvement,
and/or insuring holders of mortgages and/or deeds of trust thereon against loss
by reason of any such mechanic's or materialman's liens which may have or gain
priority over said mortgages and/or deeds of trust.

4.   In order to induce Company to issue and, in consideration of the issuance
by Company of such policies of title insurance and endorsements as it may be
willing to issue, in the manner so desired, Indemnitor promises and agrees to
hold harmless, protect, and indemnify Company from and against any and all
liability, losses, damage, expenses and charges, including, but not limited to,
attorneys' fees and expenses of 
<PAGE>   19
litigation, which it may sustain, under any policy or policies of title
insurance, or endorsements thereof, which it may at any time issue, resulting
directly or indirectly from any mechanic's or materialman's liens, or claims
thereof, affecting said property or portion or portions thereof covered by such
policy or policies, and arising out of any such work or works of improvements,
and to pay all expenses and attorney's fees incurred in the enforcement of this
Agreement.

     5.  In the event that any mechanic's or materialman's liens, or claims
thereof, arising out of any such work of improvement shall be filed against
said property, Indemnitor agrees within twenty (20) days thereafter to cause
such mechanic's or materialman's liens to be released of record, obtain and
record a bond pursuant to Civil Code Section 3143, or to deposit with Company
a sum to be determined by Company, which amount shall be not less than one and
one-half (1-1/2) times the amount claimed under such mechanic's or
materialman's liens. Should Indemnitor elect to make such deposit, Company
shall be entitled to use any portion or all of said funds to obtain a release
and satisfaction of said mechanic's or materialman's liens at any time, in the
sole discretion of Company. In the event Indemnitor fails to so remove said
mechanic's or materialman's liens, or fails to record a bond, or fails to make
the deposit required by Company, or in the event the funds deposited with
Company prove to be insufficient to satisfy said mechanic's or materialman's
liens, then Company, in its sole discretion, may elect to advance and pay such
sums as shall be necessary to procure the release and satisfaction of such
claims or liens or otherwise protecting the interest of Company and its
insureds. In the event Company finds it necessary to make an advance,
Indemnitor agrees to reimburse Company for all such advances with interest at
the rate of ten percent (10%) per annum from the date of such advancement.
These amounts shall be repaid by Indemnitor to Company within ten (10) days of
the receipt of written demand for payment.

     6.  In case Indemnitor becomes aware of litigation involving mechanic's or
materialman's liens or claims arising under any work of improvement, Indemnitor
shall within three (3) days of receipt of said notice, inform Company in
writing of such pending litigation. In the event Indemnitor fails to answer the
complaint within eight (8) days after receiving summons, Company shall have the
right, but not the duty to enter said action in the name of Indemnitor and to
take any act which, in its opinion may be necessary or desirable to protect its
interest, and/or the interest of the insureds, under this Agreement. Indemnitor
shall reimburse Company for all expenses incurred in such litigation, including
reasonable attorneys' fees.

In the event Indemnitor fails to comply with any of the terms of this
Agreement, Company may, at the expense of Indemnitor, litigate, adjust, settle
or compromise any claim, demand, suit or judgment relating to said mechanics'
lien and Indemnitor shall pay to Company the sum of amounts so expended in good
faith, under the belief that it was or might be liable for or that was
necessary or expedient to make such disbursement, whether or not any such
liability, necessity or expediency existed.

ARBITRATION.  Unless prohibited by applicable law, the Company may demand
arbitration pursuant to the Commercial Arbitration Rules of the American
Arbitration

<PAGE>   20
Association.  Arbitrable matters may include, but are not limited to, any
controversy or claim between the Company and the Indemnitor arising out of or
relating to this Agreement, or any breach thereof. Arbitration pursuant to this
Agreement and under the Rules in effect on the date of this Agreement, shall be
binding upon the parties.  Judgment upon the award rendered by the Arbitrator(s)
may be entered in any court having jurisdiction thereof.  A copy of the Rules
may be obtained from the American Arbitration Association upon request.

7.   Indemnitor hereby agrees that Company shall have and is granted the right,
at any time or times, to examine the books, records, and accounts of
Indemnitor, pertaining to any such works of improvement; and Indemnitor will,
upon request, furnish to Company all receipted bills or other evidence of
payment for work or materials furnished to said works of improvements and such
further assurances as required by Company for its protection from liability.

8.   As used herein the term "land" includes any part, parcel, or subdivision
of the described real property and any part, parcel or subdivision of the legal
or equitable interest in said real property.

9.   As used herein the terms "Works of Improvements", "Mechanic's Lien" and
"Claim of Lien" shall be deemed to refer to the applicable statutes of the
state in which the land is situated that enable mechanics, materialman, artisans
and laborers to have a lien and/or enforce such against the land and any
improvements construed thereon for the value of labor bestowed thereon and/or
materials furnished thereto.

10.  The term "policy of title insurance" includes such policies as are
customarily issued by the companies insuring priority of liens, and
marketability of title, and all endorsements thereon.  The term also includes
other documents and reports customarily issued by title companies concerning
the state of title, ownership, or interest in real property.

11.  Indemnitor may request the extension of this Agreement to include within
the term "land" other real property by executing and delivering to Title
Company additional Exhibit A's for attachment hereto and incorporation herein.

12.  Whenever the context so requires, the singular includes the plural; the
masculine, the feminine or neuter.

13.  If more than one person signs this Agreement as Indemnitor, the
obligation hereunder shall be joint and several.

14.  This Agreement shall inure to the benefit of and bind the personal
representatives and successors or assigns of the parties hereto.

15.  In the event any provision of this Agreement shall be held invalid or
unenforceable by any Court of competent jurisdiction, such holding shall not
invalidate or render unenforceable any other provision hereof.


<PAGE>   21
16.  This Agreement contains the entire agreement of the parties and shall not
be modified, except by an instrument in writing executed by all of the parties
hereto.

17.  This document may be executed in any number of counterparts each of which
shall be considered as an original and effective as such.

IN WITNESS WHEREOF, the parties hereto have executed the Agreement this
_____________ day of ____________________, 19 ____________


INDEMNITOR(S):

                                   FIDELITY NATIONAL TITLE INSURANCE
                                   COMPANY, an Arizona Corporation





                                   By 
- -------------------------------      --------------------------------

                                      Its


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

Address: 
        -----------------------

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

Phone No.: (   )
          ---------------------







<PAGE>   1
                                   Exhibit 11

                STATEMENT RE:  COMPUTATION OF PER-SHARE EARNINGS


<TABLE>
<CAPTION>
                                             Three Months Ended                       Nine Months Ended
                                      --------------------------------        -------------------------------- 
                                      September 27,       September 28,       September 27,        September 28,
                                          1997                1996                1997                 1996
                                      ------------        ------------        ------------        ------------ 
<S>                                    <C>                 <C>                  <C>                 <C>
Number of common shares             
outstanding for entire period           18,043,236          16,274,146          17,942,117          14,933,136


Weighted average number of
shares issued in public      
placement                                                    1,592,044                                 530,681


Weighted average number
of shares issued upon
conversion of convertible notes
and exercise of warrants                                                                               734,735


Weighted average number of
shares issued upon exercise of
options                                     54,489               8,476              85,417              80,969
                                      ------------        ------------        ------------        ------------ 


Weighted average number of              18,097,725          17,874,666          18,027,534          16,279,521
common shares outstanding             ============        ============        ============        ============ 

Net loss                              $ (1,231,298)       $   (672,227)       $ (3,390,208)       $ (2,173,435)
                                      ============        ============        ============        ============ 


Net loss per common share             $       (.07)       $       (.04)       $       (.19)       $       (.13)
                                      ============        ============        ============        ============ 
</TABLE>






                                       13

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM (A) THE
BALANCE SHEETS, STATEMENTS OF OPERATIONS AND STATEMENTS OF CASH FLOWS OF
THORATEC LABORATORIES CORPORATION AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH (B) QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES 
AND EXCHANGE ACT OF 1934 FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 27, 1997.
</LEGEND>
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          JAN-03-1998
<PERIOD-START>                             DEC-29-1996
<PERIOD-END>                               SEP-27-1997
<CASH>                                       4,086,516
<SECURITIES>                                 5,310,654
<RECEIVABLES>                                1,454,635
<ALLOWANCES>                                         0
<INVENTORY>                                  3,188,576
<CURRENT-ASSETS>                            14,275,975
<PP&E>                                       6,097,826
<DEPRECIATION>                             (2,061,072)
<TOTAL-ASSETS>                              19,763,238
<CURRENT-LIABILITIES>                        3,541,295
<BONDS>                                              0
                                0
                                          0
<COMMON>                                    63,818,627
<OTHER-SE>                                (47,596,684)
<TOTAL-LIABILITY-AND-EQUITY>                19,763,238
<SALES>                                      6,833,411
<TOTAL-REVENUES>                             7,387,048
<CGS>                                        2,950,123
<TOTAL-COSTS>                                2,950,123
<OTHER-EXPENSES>                             7,827,133
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                            (3,390,208)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                        (3,390,208)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (3,390,208)
<EPS-PRIMARY>                                    (.19)
<EPS-DILUTED>                                    (.19)
        

</TABLE>


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