GLIATECH INC
10-K/A, 1999-03-26
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                 AMENDMENT NO. 1
                                       TO
                                   FORM 10-K/A
                  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 1998

Commission file number 0-20096

                                  GLIATECH INC.
             (Exact Name of Registrant as Specified in Its Charter)

         DELAWARE                                        34-1587242
(State or Other Jurisdiction of                         (I.R.S. Employer
Incorporation or Organization)                         Identification No.)

23420 COMMERCE PARK ROAD, CLEVELAND, OHIO                     44122
(Address of Principal Executive Offices)                    (Zip Code)

       Registrant's Telephone Number, including area code: (216) 831-3200

          Securities registered pursuant to Section 12(b) of the Act:

                                      NONE

          Securities registered pursuant to Section 12(g) of the Act:

                     Common Stock, $0.01 par value per share

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

     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K Annual Report or any
amendment to this Form 10-K. |_|

     Aggregate market value of Common Stock held by non-affiliates as of March
2, 1999 at a closing price of $26.00 per share as reported by the Nasdaq
National Market was approximately $212,146,064. Shares of Common Stock held by
each officer and director, their respective spouses, and by each person who owns
or may be deemed to own 10% or more of the outstanding Common Stock have been
excluded because such persons may be deemed to be affiliates. This determination
of affiliate status is not necessarily a conclusive determination for other
purposes.

Number of shares of Common Stock outstanding as of March 2, 1999 was 9,467,773.

                       DOCUMENTS INCORPORATED BY REFERENCE

     Part of the following document is incorporated by reference to Part III of
this Annual Report on Form 10-K: the Proxy Statement for the Registrant's 1999
Annual Meeting of Stockholders (the "Proxy Statement").



<PAGE>   2



     Although the Consolidated Statement of Cash Flows for the years ended
December 31, 1997 and 1996 of this Item 8 contains certain amendments, the
complete text of Item 8 is included in this Form 10-K/A pursuant to Rule 12b-15
of the Securities and Exchange Act of 1934. Accordingly, Item 8 is hereby
amended and restated in its entirety as follows:

ITEM 8.   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

          Index to Financial Statements

          Report of Independent Auditors.

          Consolidated Balance Sheets at December 31, 1998 and 1997.

          Consolidated Statements of Operations for the years ended December 31,
          1998, 1997 and 1996.

          Consolidated Statements of Changes in Stockholders' Equity for the
          years ended December 31, 1998, 1997 and 1996.

          Consolidated Statements of Cash Flows for the years ended December 31,
          1996, 1997 and 1996.

          Notes to Consolidated Financial Statements.



<PAGE>   3



                REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS

Board of Directors and Stockholders
Gliatech Inc.

We have audited the accompanying consolidated balance sheets of Gliatech Inc.
and Subsidiaries as of December 31, 1998 and 1997, and the related consolidated
statements of operations, changes in stockholders' equity, and cash flows for
each of the three years in the period ended December 31, 1998. Our audits also
included the financial statement schedule listed in the Index at Item 14(a).
These financial statements and schedule are the responsibility of the Company's
management. Our responsibility is to express an opinion on these financial
statements and schedule 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 consolidated financial position of
Gliatech Inc. and Subsidiaries at December 31, 1998 and 1997, and the
consolidated results of their operations and their cash flows for each of the
three years in the period ended December 31, 1998, in conformity with generally
accepted accounting principles. Also, in our opinion, the related financial
statement schedule, when considered in relation to the basic financial
statements taken as a whole, presents fairly in all material respects the
information set forth therein.

                                                           /s/ ERNST & YOUNG LLP

Cleveland, Ohio
February 11, 1999



<PAGE>   4




                         GLIATECH INC. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                            DECEMBER 31
                                                        1998            1997
                                                    ------------    ------------
<S>                                                 <C>             <C>         
ASSETS
Current assets:
  Cash and cash equivalents                         $  4,731,814    $  5,601,398
  Short-term investments                              21,667,064       5,940,476
  Accounts receivable, less allowances of
    $602,568 in 1998 and $41,888 in 1997               2,995,548         544,051
  Government grants receivable                           401,160         207,080
  Inventories                                            776,057         164,078
  Prepaid expenses and other                           1,016,098         278,714
                                                    ------------    ------------
Total current assets                                  31,587,741      12,735,797
Property and equipment, net                            1,556,815       1,277,519
Other assets, net                                        817,630         792,072
                                                    ------------    ------------
TOTAL ASSETS                                        $ 33,962,186    $ 14,805,388
                                                    ============    ============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable                                  $    875,462    $    570,310
  Accrued expenses                                     2,083,273         689,710
  Accrued research contracts                           1,418,653         426,336
  Accrued compensation                                   790,041         179,018
  Accrued clinical trial costs                         1,127,991         690,885
  Deferred research contract revenue                     514,194         809,359
                                                    ------------    ------------
Total current liabilities                              6,809,614       3,365,618
Stockholders' equity:
  Preferred Stock, $.01 par value:
    Authorized shares--5,000,000 at December 31,
      1998 and 1997; None issued and outstanding
      at December 31, 1998 or 1997
  Common Stock, $.01 par value:
    Authorized shares--30,000,000 at December 31,
      1998 and 1997;
    Issued and outstanding shares--9,410,825
      at December 31, 1998 and 7,401,273 at
      December 31, 1997                                   94,109          74,013
  Additional paid-in capital                          72,830,961      53,379,810
  Retained deficit                                   (45,772,498)    (42,014,053)
                                                    ------------    ------------
Total stockholders' equity                            27,152,572      11,439,770
                                                    ------------    ------------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY          $ 33,962,186    $ 14,805,388
                                                    ============    ============
</TABLE>


                See notes to consolidated financial statements.



<PAGE>   5




                         GLIATECH INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                     YEAR ENDED DECEMBER 31,
                                     -----------------------
                                1998            1997            1996
                            ------------    ------------    ------------
<S>                         <C>             <C>             <C>         
REVENUES
Product sales               $ 13,925,206    $  1,536,440    $    900,932
Research contracts and
  licensing fees               2,559,131       2,954,000       2,854,860
Government grants                846,202         410,333         122,183
                            ------------    ------------    ------------
Total revenues                17,330,539       4,900,773       3,877,975
OPERATING COSTS AND
  EXPENSES
Cost of product sales          2,468,296         614,424         341,534
Research and development       9,757,717       6,952,247       6,119,533
Selling, general and
  administrative               9,359,260       4,400,535       4,070,173
Depreciation and
  amortization                   419,293         292,746         166,411
                            ------------    ------------    ------------
Total operating costs and
  expenses                    22,004,566      12,259,952      10,697,651
                            ------------    ------------    ------------
                              (4,674,027)     (7,359,179)     (6,819,676)
Settlement of claim                           (2,025,000)
Interest income, net             915,582         823,891       1,120,121
                            ------------    ------------    ------------
Net loss                    $ (3,758,445)   $ (8,560,288)   $ (5,699,555)
                            ============    ============    ============
Basic and diluted net
  loss per common share     $      (0.44)   $      (1.16)   $      (0.78)
                            ============    ============    ============
Shares used for purposes
  of computing basic and
  diluted net loss per
  common share                 8,511,014       7,354,124       7,313,230
                            ============    ============    ============

</TABLE>


See notes to consolidated financial statements.



<PAGE>   6



                         GLIATECH INC. AND SUBSIDIARIES

           CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

<TABLE>
<CAPTION>

                                     COMMON STOCK                        ADDITIONAL                                      TOTAL
                                      NUMBER OF                          PAID-IN          DEFERRED      RETAINED     STOCKHOLDERS'
                                      SHARES           PAR VALUE         CAPITAL        COMPENSATION     DEFICIT        EQUITY
                                    ---------           -------         -----------      ----------     ------------  -----------
<S>                              <C>                <C>             <C>              <C>            <C>           <C>        
BALANCE AT JANUARY 1, 1996           7,297,865          $72,978         $50,886,788        ($23,111)    ($27,754,210) $23,182,445

Exercise of Stock Options               12,175              122              91,191                                        91,313

Issuance of Stock Bonus                  6,088               61              51,688                                        51,749

Costs of Issuance of Common Stock                                           (21,954)                                      (21,954)

Exercise of Stock Warrants               3,961               40                 (40)

Deferred Compensation                                                                        23,111                        23,111

Net Loss                                                                                                  (5,699,555)  (5,699,555)
                                    ----------          -------         -----------      ----------     ------------  -----------

BALANCE AT DECEMBER 31, 1996         7,320,089           73,201          51,007,673               0      (33,453,765)  17,627,109


Exercise of Stock Options               76,000              760             306,365                                       307,125

Issuance of Stock Bonus                  5,184               52              40,772                                        40,824

Settlement of Claim                                                       2,025,000                                     2,025,000

Net Loss                                                                                                  (8,560,288)  (8,560,288)
                                    ----------          -------         -----------      ----------     ------------  -----------

BALANCE AT DECEMBER 31, 1997         7,401,273           74,013          53,379,810               0      (42,014,053)  11,439,770


Exercise of Stock Options               84,552              846             610,052                                       610,898

Issuance of Common Stock for

    Settlement of Claim                200,000            2,000              (2,000)

Issuance of Common Stock             1,725,000           17,250          18,843,099                                    18,860,349

Net Loss                                                                                                  (3,758,445)  (3,758,445)
                                    ----------          -------         -----------      ----------     ------------  -----------

BALANCE AT DECEMBER 31, 1998         9,410,825          $94,109         $72,830,961      $        0     ($45,772,498) $27,152,572
                                    ==========          =======         ===========      ==========     ============  ===========
</TABLE>



See notes to consolidated financial statements.



<PAGE>   7



                         GLIATECH INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>

                                         YEAR ENDED DECEMBER 31,
                                         -----------------------
                                 1998            1997            1996
                              ------------    ------------    ------------
<S>                           <C>             <C>             <C>          
Operating activities:
Net loss                      $ (3,758,445)   $ (8,560,288)   $ (5,699,555)
Adjustments to reconcile
  net loss to net cash
  used in operating
  activities:
  Depreciation and
    amortization                   419,293         292,746         166,411
  Patent cost write-off             30,002          48,668         277,889
  Provision for losses on
    accounts receivable            560,680
  Compensation from
    issuance of stock and
    stock options                                                   23,111
  Settlement of claim                            2,025,000
  Changes in operating
    assets and liabilities:
    Accounts receivable         (3,012,177)       (212,894)       (192,729)
    Inventories                   (611,979)        223,040          30,541
    Government grants
      receivable and other
      assets                      (931,464)       (201,228)         61,834
    Accounts payable and
      accrued expenses           1,698,715         316,773         327,822
    Other liabilities            1,745,281         (87,462)      1,137,567
                              ------------    ------------    ------------
Net cash used in operating
  activities                    (3,860,095)     (6,155,645)     (3,867,109)
Investing activities:
(Purchase) Sale of
  short-term investments,
  net                          (15,726,588)      2,934,746      (6,632,281)
Payment for patent rights
  and trademarks                  (103,770)       (186,812)       (114,629)
Purchase of property and
  equipment                       (650,378)       (418,563)       (715,153)
                              ------------    ------------    ------------
Net cash (used in) provided
  by investing activities      (16,480,736)      2,329,371      (7,462,063)
Financing activities:
Payment of demand note
  from bank                                                       (400,000)
Proceeds from (cost of)
  issuance of Common
  Stock, net                    18,860,349                         (21,954)
Proceeds from exercise of
  stock options                    610,898         307,125          91,313
                              ------------    ------------    ------------
Net cash provided by
  (used in) financing
  activities                    19,471,247         307,125        (330,641)
                              ------------    ------------    ------------
Decrease in cash
  and cash equivalents            (869,584)     (3,519,149)    (11,659,813)
Cash and cash equivalents
  at beginning of
  year                           5,601,398       9,120,547      20,780,360
                              ------------    ------------    ------------
Cash and cash equivalents
  at end of year              $  4,731,814    $  5,601,398    $  9,120,547
                              ============    ============    ============
</TABLE>



                See notes to consolidated financial statements.



<PAGE>   8



                         GLIATECH INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                  YEARS ENDED DECEMBER 31, 1998, 1997 AND 1996

A. BACKGROUND AND ACCOUNTING POLICIES

BACKGROUND

Gliatech Inc. is engaged in research, development and commercialization of the
ADCON family of products, which are proprietary, resorbable, carbohydrate
polymer medical devices designed to inhibit surgical scarring and adhesions. The
Company is also pursuing the development of small molecule drug candidates for
the treatment of several nervous system disorders, including Attention Deficit
Hyperactive Disorder ("ADHD"), sleep disorders, anxiety and Alzheimer's disease
("AD").

Historically, since commencing operations in 1988, the Company had been a
development stage company. However, the Company introduced its first product,
ADCON-L, in the United States during 1998, resulting in significant product
sales. As a result, the Company no longer considers itself a development stage
company. The Company recognizes revenue from product sales upon shipment.

The consolidated financial statements reflect the financial position and results
of operations of Gliatech Inc. and its wholly-owned subsidiaries (the
"Company"). Intercompany balances and transactions have been eliminated.

CASH AND CASH EQUIVALENTS

The Company considers all highly liquid investments with a maturity of three
months or less when purchased to be cash equivalents. The carrying amount of the
Company's cash equivalents approximates fair value due to the short maturity of
those investments. Cash equivalents are primarily commercial paper.

SHORT-TERM INVESTMENTS

The Company's short-term investments, all of which are classified as
available-for-sale, consist primarily of corporate bonds. Such investments are
stated at cost, which approximates fair value due to the short-term maturities
of these securities.

INVENTORIES

Inventories are stated at the lower of cost or market and are valued using the
first-in, first-out method.

PROPERTY AND EQUIPMENT

Property and equipment are stated at cost. Laboratory and office equipment and
leasehold improvements are depreciated on the straight-line basis over the
shorter of the lease period or the estimated useful lives (3 to 10 years).

PATENT RIGHTS AND TRADEMARKS

Patent rights are amortized on the straight-line basis over the shorter of the
estimated useful life of the patented technology or the useful life of the
patent, beginning at the time the patent is granted. Costs associated with
patents that are abandoned are expensed at the date of abandonment. Trademark
costs are amortized on the straight-line basis over the estimated useful life of
the trademark, beginning at the time the trademark is granted.

GOVERNMENT GRANTS

Revenues from government grants are recognized ratably over the period of the
grant.

RESEARCH CONTRACTS AND LICENSING FEE REVENUE

Revenue from the research collaboration agreements are recorded when earned as
defined under the terms of the agreements. Periodic research funding payments
received which are related to future performance are deferred and recognized as



<PAGE>   9



income when earned. Licensing fees and other milestone payments are recognized
as income when earned.

INCOME TAXES

The Company accounts for income taxes in accordance with the provisions of
Statement of Financial Accounting Standards (SFAS) No. 109, "Accounting for
Income Taxes."

STOCK-BASED COMPENSATION

The Company accounts for stock-based compensation in accordance with APBO No.
25, "Accounting for Stock Issued to Employees."

USE OF ESTIMATES

The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the amounts reported in the financial statements and accompanying notes.

Actual results could differ from those estimates.

NEW ACCOUNTING PRONOUNCEMENT

During 1998, the Company adopted SFAS No. 131, "Disclosures About Segments of an
Enterprise and Related Information." SFAS No. 131 establishes standards for
reporting information about operating segments and related disclosures about
products and services, geographic area and major customers. The adoption of this
statement did not effect the Company's reported financial position, results of
operations or cash flows.

RECLASSIFICATIONS

Certain prior year amounts have been reclassified to conform with current year
financial statement presentation.

B. INVENTORIES

Inventories consist of:
<TABLE>
<CAPTION>
                       DECEMBER 31
                      1998       1997
                  --------   --------
<S>               <C>        <C>     
Raw materials     $349,550   $ 36,755
Work in process    272,390     71,572
Finished goods     154,117     55,751
                  --------   --------
                  $776,057   $164,078
                  ========   ========
</TABLE>

C. PROPERTY AND EQUIPMENT

Property and equipment consist of:
<TABLE>
<CAPTION>
                                                   DECEMBER 31
                                               1998           1997
                                            -----------    -----------
<S>                                       <C>            <C>        
Laboratory equipment                        $ 1,472,202    $ 1,213,267
Office equipment                                815,181        485,674
Leasehold improvements                        1,113,321      1,051,385
                                            -----------    -----------
                                              3,400,704      2,750,326
Accumulated depreciation and amortization    (1,843,889)    (1,472,807)
                                            -----------    -----------
Property and equipment, net                 $ 1,556,815    $ 1,277,519
                                            ===========    ===========
</TABLE>




<PAGE>   10



D. OTHER ASSETS

Other assets consist of:
<TABLE>
<CAPTION>
                                                                  DECEMBER 31
                                                               1998       1997
                                                             --------   --------
<S>                                                          <C>       <C>
Patent rights, net of accumulated amortization of $110,955
  at December 31, 1998 and $82,744 at December 31, 1997      $764,182   $718,973
Trademark costs, net                                           39,951     59,503
Other                                                          13,497     13,596
                                                             --------   --------
                                                             $817,630   $792,072
                                                             ========   ========
</TABLE>

E. FINANCING ARRANGEMENTS

The Company has an unsecured line of credit that provides for borrowings up to
$1,500,000 at an interest rate of 1% above the bank's insured money market
savings account rate. No borrowings were outstanding at December 31, 1998, 1997
and 1996. Rent expense relating to the operating lease of office space was
approximately $356,000, $318,000 and $297,000 in 1998, 1997 and 1996,
respectively. Future annual minimum lease commitments at December 31, 1998 are
as follows:
<TABLE>
<CAPTION>
<S>                                                      <C>       
1999                                                     $  482,125
2000                                                        521,501
2001                                                        521,501
2002                                                        105,003
2003                                                        105,003
Thereafter                                                  612,516
                                                         ----------
Total                                                    $2,347,649
                                                         ==========
</TABLE>

F. INCOME TAXES

At December 31, 1998, the Company has available net operating loss carryforwards
of approximately $29.0 million. In addition, the Company has approximately $2.8
million in research and development tax credit carryforwards. Such losses and
credit carryforwards may be used to reduce future tax liabilities and expire at
various dates between 2003 and 2013. The Company has offset the tax benefit of
the net operating loss and tax credit carryforwards and other deferred tax
assets with a valuation allowance as realization of the benefits is not assured.

The Company's net deferred tax assets and liabilities consist of the following:
<TABLE>
<CAPTION>
                                                           1998             1997
                                                       ------------    ------------
<S>                                                    <C>             <C>          
Deferred tax liabilities                               $   (290,000)   $   (273,000)
Deferred tax assets:
   Amortization of capitalized research
   and development expenses for tax                       3,740,000       4,420,000
   Research and development tax credit carryforwards      2,783,000       2,119,000
   Net operating tax loss carryforwards                  12,369,000       9,931,000
   Other                                                    957,000       1,118,000
                                                       ------------    ------------
Total deferred tax assets                                19,849,000      17,588,000
Valuation allowance                                     (19,559,000)    (17,315,000)
                                                       ------------    ------------
Net deferred taxes                                     $          0    $          0
                                                       ============    ============
</TABLE>

Pursuant to the Tax Reform Act of 1986, the utilization of net operating loss
and research and development tax credit carryforwards for tax purposes may be
subject to an annual limitation if a cumulative change in ownership of more than
50% occurs over a three-year period.

G. RIGHTS PLAN

On July 1, 1997, the Company declared a dividend distribution of one right (a
"Right") for each outstanding share of Common Stock. The terms of the Rights are
set forth in the Rights Agreement, dated July 1, 1997, between the Company and a
rights agent. The Rights generally will become exercisable and allow a holder to
acquire Common Stock at a discounted price if a person or group acquires 15% or
more of the outstanding shares of Common Stock of the Company. The Company is
also subject to provisions of state law which will prohibit the Company from
engaging in any "business combination" with a person who, together with
affiliates and



<PAGE>   11



associates, owns 15% or more of the Company's Common Stock (an "Interested
Stockholder") for a period of three years following the date that such person
became an Interested Stockholder, unless the business combination is approved in
a prescribed manner or certain other requirements are satisfied.

H. STOCK OPTION PLANS

The Company has a 1989 Stock Option Plan for employees and 1992 and 1995 Stock
Option Plans for members of the Company's Board of Directors. These plans
provide for the granting of 1,270,000 options to employees and 190,000 options
to Directors. These options generally vest over a three or four year period and
become exercisable in part one year after date of grant and expire at the end of
ten years. At December 31, 1998, there were 131,142 options available for future
grant.

A summary of the status of the Company's three stock option plans as of December
31, 1998, 1997 and 1996 and changes during the years then ended is presented
below:
<TABLE>
<CAPTION>
                                                1998                       1997                       1996
                                                ----                       ----                       ----
                                                      WEIGHTED-                WEIGHTED-                 WEIGHTED-
                                                      AVERAGE                  AVERAGE                   AVERAGE
                                                      EXERCISE                 EXERCISE                  EXERCISE
                                        SHARES         PRICE      SHARES        PRICE      SHARES         PRICE
                                        ------         -----      ------        -----      ------         -----
<S>                                    <C>             <C>        <C>         <C>          <C>           <C>   
Outstanding at beginning
  of year                              1,110,175       $ 7.56     978,375     $ 6.85       765,700       $ 7.34
Granted                                  131,000        17.66     225,300       9.46       247,800         8.53
Exercised                                (84,552)        7.23     (76,000)      4.04       (12,175)        7.50
Canceled                                 (31,807)       11.15     (17,500)      8.14       (22,950)        7.75
                                      ----------                ---------                ---------
Outstanding at end of
  year                                 1,124,816       $ 8.67   1,110,175     $ 7.56       978,375       $ 6.85
                                      ==========       ======   =========     ======     =========       ======
Options exercisable
  at year-end                            723,370                  491,692                  362,650
Weighted-average fair
     value of options
     granted during the year          $    11.16                 $   6.12                $    5.15
</TABLE>

The following table summarizes information about options outstanding at December
31, 1998:
<TABLE>
<CAPTION>
                            OPTIONS OUTSTANDING                OPTIONS EXERCISABLE
                            -------------------                -------------------
                                WEIGHTED-
                                 AVERAGE         WEIGHTED-                    WEIGHTED-
RANGE OF       NUMBER           REMAINING         AVERAGE       NUMBER         AVERAGE
EXERCISE     OUTSTANDING       CONTRACTUAL       EXERCISE     EXERCISABLE     EXERCISE
PRICES       AT 12/31/98        LIFE (YRS)        PRICE        AT 12/31/98       PRICE
- ------       -----------        ----------        -----        -----------       -----
<S>            <C>                <C>             <C>             <C>          <C>   
$0-5           131,800            2.20            $  .99          131,800      $  .99
 5-10          720,816            7.10              8.08          510,153        8.05
 10-25         272,200            8.98             13.94           81,417       12.65
             ---------                                          ---------
             1,124,816                                            723,370
             =========                                          =========
</TABLE>

At December 31, 1998, 1,255,958 shares of common stock are reserved for issuance
under the stock option plans and 20,000 shares are reserved for issuance under
common stock warrants outstanding for $7.50 per share.

The Company applies APBO No. 25, "Accounting for Stock Issued to Employees" and
related interpretations in accounting for its plans. Accordingly, no
compensation cost has been recognized for the fixed stock option plans. Had
compensation cost for the Company's three stock-based compensation plans been
determined based on the fair value at the grant dates for awards under those
plans consistent with the method of SFAS No. 123, "Accounting for Stock-Based
Compensation," the Company's net loss and net loss per share would have
increased to the pro forma amounts indicated below:
<TABLE>
<CAPTION>
                                                1998            1997            1996
                                                ----            ----            ----
<S>                       <C>             <C>              <C>             <C>         
Net loss                    As reported     $(3,758,445)     $(8,560,288)    $(5,699,555)
                            Pro forma       $(5,011,723)     $(9,166,993)    $(6,351,247)
Basic and diluted  net
  loss per common share     As reported     $      (.44)     $     (1.16)    $      (.78)
                            Pro forma       $      (.59)     $     (1.25)    $      (.87)
</TABLE>



<PAGE>   12



For pro forma calculations, the fair value of each option grant is estimated on
the date of grant using the Black-Scholes option-pricing model with the
following assumptions:
<TABLE>
<CAPTION>
                                 1998               1997           1996
                                 ----               ----           ----
<S>                       <C>                <C>            <C>
Expected volatility               77%                75%            67%
Risk-free interest rates      4.31-5.60%         5.71-6.48%     5.32-6.49%
Expected life                4 or 5 years       4 or 5 years   4 or 5 years
</TABLE>

I. BUSINESS SEGMENT

The Company operates in one business segment. It is engaged in the development
and commercialization of the Company's principal products, the ADCON family,
which are medical devices designed to inhibit excess postsurgical scarring and
adhesion following surgery. The Company sells ADCON products to independent
distributors in approximately 30 European countries and directly to hospitals in
the United States. The Company does not have foreign facilities and therefore
does not measure operating profit or loss from foreign sales.

Domestic and foreign product sales are as follows:
<TABLE>
<CAPTION>

                           1998                1997             1996
                           ----                ----             ----
<S>                       <C>               <C>              <C>        
Domestic product sales  $11,648,214
Foreign product sales     2,276,992         $ 1,536,440      $   900,932
                        ===========         ===========      ===========
Total product sales      13,925,206           1,536,440          900,932
</TABLE>

All of the Company's long-lived assets are located in the United States.

J. RESEARCH COLLABORATION AGREEMENTS

In October 1994, the Company established a research and development
collaboration with Janssen Pharmaceutica, N.V. ("Janssen"), a wholly-owned
subsidiary of Johnson & Johnson, for the discovery and development of compounds
suitable for the treatment of Alzheimer's disease. In October 1998, this
collaboration was restructured to provide for further research by the Company
until May 1999. Deferred revenue related to these agreements was $514,228 and
$809,359 at December 31, 1998 and 1997, respectively. In addition, Janssen is
required to make milestone payments to the Company upon the achievement of
development and clinical benchmarks. Johnson & Johnson has worldwide
distribution rights for all products developed as a result of this
collaboration. The Company will receive a royalty on sales of such products.
Janssen is also responsible for all development costs, including clinical trials
and obtaining regulatory approval.

K. RESEARCH, CLINICAL TRIAL, CONSULTING AND LICENSE AGREEMENTS

Since beginning operations, the Company has entered into research agreements and
clinical trial agreements with universities and third parties and consulting
agreements with scientific advisors. The research agreements require the Company
to fund certain research activities, and are generally renewable on an annual
basis. In return, the Company has rights to obtain and use exclusive licenses
for the results of the research. Under license agreements with various
universities, ownership of all patents resulting from research agreements will
remain with the universities or researchers. The Company is required to incur
all costs associated with applying for and maintaining the patents. The Company
generally will obtain exclusive worldwide licensing rights and is required to
remit fixed percentages, as defined, of the net selling price of licensed
products and royalties received from sublicensees to the universities and
researchers. The clinical trial agreements require the Company to fund the
performance of specific clinical procedures and the cost of administering the
clinical trials.

As of December 31, 1998, minimum commitments under research, clinical trial and
consulting agreements are $1,116,761 for 1999.



<PAGE>   13



L. SETTLEMENT OF CLAIM

In 1995, a dispute regarding inventorship of the ADCON(R) products and the
rights of Case Western Reserve University(CWRU) to receive royalties from sales
of ADCON(R) products arose between the Company and CWRU. After extensive
discussions between the Company and CWRU, a complaint was filed by the Company
on September 8, 1997 in the United States District Court Northern District of
Ohio, Eastern Division ("Court") against CWRU and one of its employees,
requesting the Court to confirm that there was no error in the omission of the
employee as a named inventor of the Company's patents. The complaint was filed
in response to repeated statements to the Company and the general public made by
the employee and CWRU alleging that the inventorship of the patent was in error
because the employee was not named. The complaint did not seek monetary damages.
As an agreement in principle had been reached between the Company and CWRU in
1997, the Company recorded a charge of $2,025,000 based on the fair value of the
Company's common stock at that time. The Company recorded the offset to the
charge as a component of stockholders' equity in 1997.

In March 1998 the suit was dismissed pursuant to the terms and conditions of a
Settlement Agreement between the Company and CWRU and the Company issued 200,000
shares of common stock to CWRU and the employee.



<PAGE>   14



                                   SIGNATURES

                  Pursuant to the requirements of Section 13 or 15(d) of the
Securities Exchange Act of 1934, the registrant has duly caused this Amendment
No. 1 to the Annual Report on Form 10-K/A to be signed on its behalf by the
undersigned, thereunto duly authorized.

                         GLIATECH INC.

                         BY: /s/ RODNEY E. DAUSCH
                         Rodney E. Dausch
                         Vice President and Chief Financial Officer

                         DATE: March 26, 1999

                  Pursuant to the requirements of the Securities Exchange Act of
1934, this Amendment No. 1 to the Annual Report on Form 10-K/A has been signed
below by the following persons on behalf of the registrant and in the capacities
and on the dates indicated.
<TABLE>
<CAPTION>

SIGNATURE                                     TITLE                              DATE
<S>                                <C>                                     <C>
         *                           President and Chief Executive            March 26, 1999
- ------------------------------       Officer (Principal Executive
Thomas O. Oesterling, Ph.D.          Officer) and Director
                                     

/s/ RODNEY E. DAUSCH                 Vice President and Chief                 March 26, 1999
- ------------------------------       Financial Officer
Rodney E. Dausch                     (Principal Financial Officer and
                                     Principal Accounting Officer)

        *                            Chairman of the Board                    March 26, 1999
- ------------------------------       
Robert P. Pinkas                     

        *                            Director                                 March 26, 1999
- ------------------------------       
William A. Clarke                    

                                     Director                                 March 26, 1999
- ------------------------------ 
Theodore E. Haigler, Jr.             

        *                            Director                                 March 26, 1999
- ------------------------------       
Ronald D. Henriksen                  

        *                            Director                                 March 26, 1999
- ------------------------------       
Irving S. Shapiro                    

        *                            Director                                 March 26, 1999
- ------------------------------       
John L. Ufheil                       

</TABLE>

*    The undersigned, by signing his name hereto, does sign and execute this
     Amendment No. 1 to the Annual Report on Form 10-K/A pursuant to the Powers
     of Attorney executed by the above-named officers and Directors of the
     Company and filed with the Securities and Exchange Commission on behalf of
     such officers and Directors.

By:  /s/ RODNEY E. DAUSCH                                         March 26, 1999
     RODNEY E. DAUSCH, ATTORNEY-IN-FACT





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