Securities and Exchange Commission
                             Washington, D.C. 20549
                                    FORM 10-Q
 (Mark One)
[X]  QUARTERLY  REPORT  UNDER  SECTION  13 OR 15(D) OF THE  SECURITIES
                              EXCHANGE ACT OF 1934
                For the quarterly period ended September 30, 1999

[ ]  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: 000-26727

                          BIOMARIN PHARMACEUTICAL INC.
          (Exact name of registrant issuer as specified in its charter)

           Delaware                                     68-0397820
(State or other jurisdiction of           (I.R.S. Employer Identification No.)
incorporation or organization)

          371 Bel Marin Keys Blvd.,  Suite 210,  Novato,  California 94949
                    (address of principal executive offices)
                                   (Zip Code)
                                 (415) 884-6700
              (Registrant's telephone number, including area code)

              (Former name, former address and former fiscal year,
                         if changed since last report)

     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 past 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

                APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY
                   PROCEEDINGS DURING THE PRECEDING FIVE YEARS

     Indicate  by check mark  whether the  registrant  filed all  documents  and
reports  required  to be filed by  Sections  12,  13 or 15(d) of the  Securities
Exchange Act of 1934 subsequent to the  distribution of securities  under a plan
confirmed by a court. Yes ____ No_____

                      APPLICABLE ONLY TO CORPORATE ISSUERS

     Indicate the number of shares  outstanding of each of the issuer's  classes
of common stock, as of the latest  practicable  date:  34,821,430  shares Common
Stock, par value $0.001, outstanding as of October 31, 1999.








                          BIOMARIN PHARMACEUTICAL INC.
                                TABLE OF CONTENTS

                                                                           Page

PART I.  FINANCIAL INFORMATION

         Item 1.  Financial Statements (Unaudited).

         Consolidated Balance Sheets as of December 31, 1998
            and September 30, 1999                                         2
         Consolidated Statements of Operations for the three-month periods
            ended September 30, 1998 and 1999                              3
         Consolidated Statements of Operations for the nine-month periods
            ended September 30, 1998 and 1999 and for the period from
            March 21, 1997(inception) to September 30, 1999                4
         Consolidated  Statements of Cash Flows for the nine-month periods
            ended September  30,  1998 and 1999 and for the period from
            March 21, 1997(inception) to September 30, 1999                5
         Notes to Consolidated Financial  Statements                       6

         Item 2.  Management's Discussion and Analysis                     8

         Item 3.  Quantitative and Qualitative Disclosure
                     about Market Risk                                     25


PART II. OTHER INFORMATION

         Item 1.  Legal Proceedings                                        26

         Item 2.  Changes in Securities and Uses of Proceeds               26

         Item 3.  Defaults upon Senior Securities                          26

         Item 4.  Submission of Matters to a Vote of Security Holders      26

         Item 5.  Other Information                                        26

         Item 6.  Exhibits and Reports on Form 8-K                         27

SIGNATURE                                                                  28









                          PART 1. FINANCIAL INFORMATION

Item 1.  Financial Statements (Unaudited)

                  BIOMARIN PHARMACEUTICAL INC. AND SUBSIDIARIES
                          (a development-stage company)

                           CONSOLIDATED BALANCE SHEETS
                 AS OF DECEMBER 31, 1998 AND SEPTEMBER 30, 1999
               ($ Thousands, except for share and per share data)

                                                December 31,       September 30,
                                                    1998                1999
                                             ----------------    ---------------
    ASSETS                                                         (unaudited)
CURRENT ASSETS:
    Cash and cash equivalents                  $    9,414         $   32,585
    Short-term investments                          1,975             39,572
    Accounts receivable, net                          148                409
    Due from Glyko Biomedical Ltd.                    114                137
    Due from BioMarin/Genzyme LLC                     419              2,185
    Inventories                                        72                939
    Prepaid expenses                                  676                529
                                             ----------------    ---------------
                Total current assets               12,818             76,356

PROPERTY AND EQUIPMENT, net                         6,223             22,934
GOODWILL AND OTHER INTANGIBLE ASSETS, net          11,704             11,613
INVESTMENT IN BIOMARIN/GENZYME LLC                    685              1,510
DEPOSITS                                               79                120
                                             ----------------    ---------------
                Total assets                  $    31,509         $  112,533
                                             ================    ===============

    LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
    Accounts payable                          $     1,340         $    4,961
    Accrued liabilities                               640                623
    Notes payable short-term                           24                 26
                                             ----------------    ---------------
                Total current liabilities           2,004              5,610

LONG-TERM LIABILITIES:
    Long-term portion of notes                        110                 90
                                             ----------------    ---------------

                  Total liabilities                 2,114              5,700

STOCKHOLDERS' EQUITY:
    Common stock, $0.001 par value:
     50,000,000 shares  authorized,
     26,176,180 and 34,810,129 shares issued
     and outstanding at December 31, 1998, and
     September 30, 1999, respectively                  26                 35
    Additional paid-in capital                     50,058            146,302
    Warrants                                          128                128
    Deferred compensation                          (3,253)            (2,922)
    Notes receivable from stockholders             (2,488)            (2,600)
    Deficit accumulated during the
     development stage                            (15,076)           (34,110)
                                             ----------------    ---------------
                  Total stockholders' equity       29,395            106,833
                                             ----------------    ---------------
                  Total liabilities and
                   stockholders' equity       $    31,509         $  112,533
                                             ================    ===============

        The accompanying notes are an integral part of these statements.
                                        2








             BIOMARIN PHARMACEUTICAL INC. AND SUBSIDIARIES
                     (a development-stage company)

                      CONSOLIDATED STATEMENTS OF OPERATIONS
          FOR THE THREE-MONTH PERIODS ENDED SEPTEMBER 30, 1998 AND 1999
                    ($ Thousands, except for per share data)



                                                    Three Months Ended
                                                       September 30,
                                            ------------------------------------
                                                  1998                 1999
                                            ---------------       --------------
                                              (unaudited)           (unaudited)

      REVENUES:
         Revenues--products                     $    --               $    489
         Revenues--services                          --                      3
         Revenues from BioMarin/Genzyme LLC         141                  1,507
         Revenues--other                                                   --
                                            ---------------       --------------

                      Total revenues                141                 1,999

      OPERATING COSTS AND EXPENSES:
         Cost of products                            --                   117
         Cost of services                            --                     1
         Research and development                 1,749                 7,658
         Selling, general and administrative      1,440                 1,955
                                            ---------------       --------------
                      Total operating costs
                       and expenses               3,189                 9,731
                                            ---------------       --------------
                      Loss from operations       (3,048)               (7,732)

      INTEREST INCOME                               230                   724

      INTEREST EXPENSE                               --                  (167)

      EQUITY IN LOSS OF BIOMARIN/GENZYME LLC         --                  (468)
                                            ---------------       --------------
                      Net loss                 $ (2,818)            $  (7,643)
                                            ===============       ==============

      NET LOSS PER SHARE, basic and diluted    $  (0.12)            $    (0.24)
                                            ===============       ==============
      WEIGHTED AVERAGE COMMON SHARES
       OUTSTANDING (Thousands)                   22,736                 32,476
                                            ===============       ==============









        The accompanying notes are an integral part of these statements.
                                       3








                  BIOMARIN PHARMACEUTICAL INC. AND SUBSIDIARIES
                          (a development-stage company)

                      CONSOLIDATED STATEMENTS OF OPERATIONS
        FOR THE NINE-MONTH PERIODS ENDED SEPTEMBER 30, 1998 AND 1999, AND
      FOR THE PERIOD FROM MARCH 21, 1997  (INCEPTION) TO SEPTEMBER 30,
                    1999 ($ Thousands, except for per share data)




                                                                                                For the period
                                                                                                March 31, 1997
                                                                Nine Months Ended               (Inception), to
                                                                  September 30,                  September 30,
                                                      ---------------------------------------
                                                            1998                 1999                1999
                                                      -----------------    ------------------   ----------------
                                                        (unaudited)           (unaudited)         (unaudited)
                                                                                       
REVENUES:

   Revenues--products                                       $   --            $    1,018            $   1,156
   Revenues--services                                           --                    81                  193
   Revenues from BioMarin/Genzyme LLC                         141                  3,411                4,248
   Revenues--other                                              --                   151                  254
                                                      -----------------    ------------------   ----------------
                Total revenues                                141                  4,661                5,851

OPERATING COSTS AND EXPENSES:

   Cost of products                                            --                    234                  283
   Cost of services                                            --                     99                  158
   Research and development                                 3,904                 18,029               30,446
   Selling, general and administrative                      2,772                  4,759                9,203
                                                      -----------------    ------------------   ----------------
                 Total operating costs and
                  expenses                                  6,676                 23,121               40,090
                                                      -----------------    ------------------   ----------------

                Loss from operations                       (6,535)               (18,460)             (34,239)

INTEREST INCOME                                               469                  1,177                1,926

INTEREST EXPENSE                                               --                   (728)                (728)

EQUITY IN LOSS OF BIOMARIN/GENZYME LLC                         --                 (1,023)              (1,070)
                                                      -----------------    ------------------   ----------------
                Net loss                                   $    (6,066)         $ (19,034)          $ (34,111)
                                                      =================    ==================   ================

NET LOSS PER SHARE, basic and diluted                      $     (0.28)         $   (0.67)          $   (1.72)
                                                      =================    ==================   ================
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
   (Thousands)                                                  21,298             28,299              19,801
                                                      =================    ==================   ================











        The accompanying notes are an integral part of these statements.
                                        4






                  BIOMARIN PHARMACEUTICAL INC. AND SUBSIDIARIES
                          (a development-stage company)

                      CONSOLIDATED STATEMENTS OF CASH FLOWS
      FOR THE NINE-MONTH PERIODS ENDED SEPTEMBER 30, 1998 AND 1999, AND FOR
        THE PERIOD FROM MARCH 21, 1997 (INCEPTION) TO SEPTEMBER 30, 1999
                                  ($ Thousands)



                                                                                                       Period from
                                                                        Nine Months Ended            March 21, 1997
                                                                          September 30,             (Inception), to
                                                                    1998              1999        September 30, 1999
                                                             -----------------   ----------------  -----------------
                                                                 (unaudited)        (unaudited)       (unaudited)
                                                                                           
CASH FLOWS FROM OPERATING ACTIVITIES:
   Net loss                                                     $ (6,066)             $  (19,034)       $  (34,111)
   Adjustments to reconcile net loss to net cash used in
     operating activities:
       Depreciation                                                   98                   2,353             2,666
       Amortization of deferred compensation                          58                     965             1,228
       Amortization of goodwill                                       --                     841             1,112
       Accrued interest on notes receivable from stockholders       (171)                   (112)             (377)
       Compensation in the form of common stock and common
         stock options                                                --                      --                18

       Loss from BioMarin/Genzyme LLC                                142                   4,433             4,480
       Write-off of in-process technology                             --                      --             2,625
   Changes in operating assets and liabilities:
     Accounts receivable                                             (37)                   (261)             (409)
     Due from Glyko Biomedical Ltd.                                   (2)                    (23)             (137)
     Due from BioMarin/Genzyme LLC                                  (283)                 (1,766)           (2,185)
     Inventories                                                      --                    (867)             (939)
     Prepaid expenses                                                (79)                    148              (528)
     Deposits                                                        (62)                    (41)             (120)
     Accounts payable                                              1,372                   3,620             4,960
     Accrued liabilities                                             (43)                    (17)              623
     Due to Glyko, Inc.                                               94                      --                --
                                                               ---------------   ----------------  -----------------
          Net cash used in operating activities                   (4,979)                 (9,761)          (21,094)
                                                               ---------------   ----------------  -----------------

CASH FLOWS FROM INVESTING ACTIVITIES:

   Purchase of property and equipment                             (1,897)                (19,063)          (25,597)
   Investment in BioMarin/Genzyme LLC                               (489)                 (5,260)           (5,992)
   Purchase of assets from OGS                                        --                  (1,500)           (1,500)
   Intangibles and other assets, net                                  --                     750               750
     Sale (purchase) of short-term investments                       901                 (37,596)          (39,572)
                                                               ---------------   ----------------  -----------------
      Net cash used in investing activities                       (1,485)                (62,669)          (71,911)
                                                               ---------------   ----------------  -----------------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Proceeds from note payable                                         --                      --               134
   Bridge loan                                                        --                      --               880
   Proceeds from sale of common stock, net of issuance costs      19,430                  95,619           124,594
   Repayment of equipment loan                                        --                     (18)              (18)
                                                               ---------------   ----------------  -----------------
      Net cash provided by  financing activities                  19,430                  95,601           125,590
                                                               ---------------   ----------------  -----------------
      Net increase in cash and cash equivalents                   12,966                  23,171            32,585

CASH AND CASH EQUIVALENTS:
   Beginning of period                                             5,987                   9,414                --
                                                               ---------------   ----------------  -----------------
   End of period                                                $ 18,953              $   32,585        $   32,585
                                                               ===============   ================  =================


        The accompanying notes are an integral part of these statements.
                                        5








                  BIOMARIN PHARMACEUTICAL INC. AND SUBSIDIARIES
                          (a development-stage company)

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                   (Unaudited)

1.    BASIS OF PRESENTATION:

BioMarin   Pharmaceutical   Inc.   (BioMarin  or  Company)  is  a  developer  of
carbohydrate  enzyme  therapies  for  debilitating,   life-threatening,  chronic
genetic disorders and other diseases or conditions. The Company was incorporated
in October 1996 as a wholly-owned subsidiary of Glyko Biomedical Ltd. (GBL). The
Company was funded by GBL and began  operations  on March 21, 1997,  the date of
inception.  In October 1998, the Company  acquired  Glyko,  Inc., a wholly-owned
subsidiary of GBL in a transaction valued at $14.5 million.

The accompanying  unaudited consolidated financial statements have been prepared
in  accordance  with  generally  accepted  accounting   principles  for  interim
financial  information  on  substantially  the same basis as the annual  audited
financial  statements.  Accordingly,  they do not include all of the information
and footnotes required by generally accepted accounting  principles for complete
financial statements. In the opinion of management, all adjustments,  consisting
of normal recurring  adjustments,  considered  necessary for a fair presentation
have been  included.  Operating  results for the three- and  nine-month  periods
ended September 30, 1999 are not necessarily  indicative of the results that may
be expected for the year ending December 31, 1999. These consolidated  financial
statements  should be read in  conjunction  with the  financial  statements  and
footnotes thereto for the year ended December 31, 1998 included in the Company's
Form S-1 Registration Statement.

2.       SIGNIFICANT ACCOUNTING POLICIES:

Short-term investments

Short-term  investments  consists   primarily  of  government  and fixed  income
securities for which the  company  plans  to hold to maturity. These investments
are reported at amortized  costs  in  the accompanying balance sheets. The total
market value of  these  securities  as  of September 30, 1999 was not materially
different from the carrying value.

Property and Equipment

Property and equipment are stated at cost.  Depreciation  is computed  using the
straight-line method.  Leasehold improvements are amortized over the life of the
asset or the term of the lease, whichever is shorter.  Significant additions and
improvements  are  capitalized,  while  repairs and  maintenance  are charged to
expense as incurred.

Property and equipment consisted of the following ($thousands):




                                             December 31,        September 30,            Estimated
                                                1998                 1999                Useful Lives
                                         ------------------     ------------------  -------------------------

                                                                           
Computer hardware and software              $     162              $    404                     3 years
Office furniture and equipment                    372                   750                     5 years
Manufacturing/Laboratory equipment              3,469                 7,180                     5 years
                                                                                           Shorter of life of
Leasehold improvements                          2,532                17,268                asset or lease term
                                         ------------------     ------------------
                                                6,535                25,602
Less:  Accumulated depreciation                  (312)               (2,668)
                                        ------------------      ------------------
         Total, net                       $     6,223              $ 22,934
                                        ==================      ==================


                                       6





Research and Development

Research and development  expenses include the expenses associated with contract
research and  development  provided by third parties,  research and  development
provided in connection  with  BioMarin/Genzyme  LLC, a joint venture,  including
clinical and regulatory costs, and internal research and development  costs. All
research and development costs discussed above are expensed as incurred.

Net Income (Loss) per Share

Basic net income (loss) per share is calculated by dividing net income (loss) by
the weighted average common shares  outstanding  during the period.  Diluted net
income per share is calculated by dividing net income by the weighted average of
common  stock  outstanding  and  potential  common  shares  during  the  period.
Potential  common shares include  dilutive  shares issuable upon the exercise of
outstanding common stock options,  warrants,  and contingent issuances of common
stock. For periods in which the Company has losses, such potential common shares
are excluded from the computation of diluted net loss per share, as their effect
is antidilutive.

3.    INITIAL PUBLIC OFFERING:

The Company  completed its Initial Public Offering (IPO) of 4,500,000  shares of
common  stock at $13.00 per share on July 23,  1999,  raising  net  proceeds  of
approximately  $51.9 million.  In a private  placement  concurrent with the IPO,
Genzyme  invested  in the  Company $10 million at the IPO price of $13 per share
(769,230  shares of common stock).  In addition,  the $26 million of convertible
notes  sold by the  Company  on April 13,  1999,  plus  accrued  interest,  were
converted  into  2,672,020  shares  of  common  stock  at  $10  per  share.  The
underwriters'  over-allotment  exercise in August raised additional net proceeds
of $8.1 million at the IPO price (675,000 shares of common stock).























                                        7







Item 2.  Management's  Discussion  and  Analysis of  Financial
Condition and Results of Operations


                           FORWARD-LOOKING STATEMENTS

The  following  discussion  and analysis of financial  condition  and results of
operations  contains  "forward-looking  statements" as defined under  securities
laws. These statements can often be identified by the use of terminology such as
"believes,"  "expects,"   "anticipates,"  "plans,"  "may,"  "will,"  "projects,"
"continues,"   "estimates,"   "potential,"   "opportunity"   and  so  on.  These
forward-looking  statements  may be  found  in the  "Risk  Factors,"  and  other
sections  of this  document.  Our actual  results  or  experience  could  differ
significantly from the forward-looking  statements.  Factors that could cause or
contribute to these  differences  include those  discussed in "Risk Factors," as
well as those discussed elsewhere in this document.

Overview

We  are  a  developer  of  carbohydrate   enzyme  therapies  for   debilitating,
life-threatening,  chronic  genetic  disorders and other diseases or conditions.
Since our  inception  on March 21,  1997,  we have been  engaged in research and
development  activities,  including  preclinical  studies,  clinical  trials and
clinical  manufacturing,  the  establishment  of  laboratory  and  manufacturing
facilities, and administrative activities.  BioMarin was incorporated in October
1996 as a wholly-owned  subsidiary of Glyko Biomedical Ltd.  ("GBL",  TSE: GBL).
BioMarin was initially funded by GBL and began operations on March 21, 1997, the
date of inception.

We have  incurred  net losses since  inception  and had an  accumulated  deficit
through September 30, 1999 of $34.1 million.  Our losses have resulted primarily
from research and development activities and related administrative expenses. We
expect to continue to incur operating losses at least six months into 2001.

To date,  we have not generated  revenues from the sale of our drug  candidates.
Our lead product is Aldurazyme(TM), alronidase for injection, (recombinant human
(alpha)-L-iduronidase),  which  is  under  clinical  trials  for  use in  enzyme
replacement   therapy  for   Mucopolysaccharridosis-I   or  MPS-I.  In  previous
documents,  Aldurazyme(TM)  was identified as BM101.  Our financial  results may
vary depending on many factors, including:

     . The progress of  Aldurazyme(TM)  in the  regulatory
        processes and initial sales activities

    .  The   investment   in   manufacturing   process
        development   and   in   manufacturing   capacity   for
        Aldurazyme(TM) and other product candidates


     . The  acceleration  of our  other  pharmaceutical
        candidates into preclinical studies and clinical trials

     . The  progress  of our  additional  research  and
        development efforts

In September 1998, we established a joint venture with Genzyme for the worldwide
development and  commercialization of Aldurazyme(TM) for the treatment of MPS-I.
Under the  agreement,  our company and Genzyme are each required to make capital
contributions to the joint venture equal to 50% of the expenses  associated with
the development and  commercialization of Aldurazyme(TM).  We will share equally
in any profits generated from the sales of Aldurazyme(TM).

In October 1998, we acquired Glyko, Inc., a wholly-owned  subsidiary of GBL in a
transaction valued at $14.5 million.  Glyko, Inc. provides products and services
that  perform   carbohydrate   analysis   and  medical   diagnosis  to  research
institutions and commercial laboratories.

In July 1999,  we completed  our initial  public  offering  ("IPO") of 4,500,000
shares  of  our  common  stock  at  $13  per  share   raising  net  proceeds  of
approximately  $51.9 million.  In a private  placement  concurrent with the IPO,
Genzyme  purchased $10 million of our common stock  (769,230  shares) at the IPO
price of $13.  In  addition,  the $26 million of  convertible  notes sold by the
Company on April 13, 1999, plus accrued interest,  were converted into 2,672,020
shares of common stock at $10 per share.

In August 1999,  the  underwriters  exercised  their  over-allotment  option for
675,000  shares  at the IPO  price  of $13 per  share,  raising  additional  net
proceeds of $8.1 million.

                                       8






Results of Operations

The Quarters Ended September 30, 1999 and 1998

Revenues for the third quarter of 1999 totaled  $1,999,000  compared to revenues
of $141,000 in the third quarter of 1998.  Third quarter 1999 revenues  included
$1,507,000  from the joint venture with Genzyme General  (Nasdaq:  GENZ) for the
development and  commercialization of Aldurazyme(TM),  alronidase for injection,
(recombinant    human    (alpha)-L-iduronidase)    for    the    treatment    of
Mucopolysaccharidosis-I  (MPS-I).  MPS-I  is  a  chronic,  debilitating  genetic
disease  which  afflicts  children  and  leads to death  before  adulthood  in a
majority of patients. The BioMarin/Genzyme joint venture was formed on September
4, 1998. Third quarter 1999 revenues also included $492,000  generated by Glyko,
Inc.,  BioMarin's  subsidiary  engaged in the sale of analytical  and diagnostic
products and services,  which was acquired by BioMarin on October 7, 1998. On an
ongoing basis, Glyko, Inc. revenues for the third quarter of 1999 were up 58% in
comparison  to the  third  quarter  of 1998 as a  result  of  revenues  from the
acquisition of the biochemical reagents business of Oxford GlycoSciences Plc.
(LSE: OGS), which was acquired in May 1999.

Cost of products and cost of services  related to Glyko,  Inc.  operations  were
$118,000 in the third quarter of 1999 and were zero in the comparable  period of
1998. On an ongoing basis,  Glyko's total product and service costs as a percent
of the sales of products and services were 25% in both the third quarter of 1999
and of 1998.

Research and  development  expenses for the third  quarter of 1999  increased by
$5,909,000  from  $1,749,000  in the third  quarter of 1998 to $7,658,000 in the
third quarter of 1999. This increase was due primarily to increased  activity in
support of the joint venture with Genzyme for  Aldurazyme(TM)  and in support of
the Company's enzyme product candidates for MPS-VI and burn debridement.

Selling,  general and  administrative  expenses increased from $1,440,000 in the
third  quarter  of  1998 to  $1,955,000  in the  third  quarter  of 1999  due to
increased BioMarin administrative staff expenses to support expanded operations.

BioMarin's equity in the loss of its joint venture with Genzyme was $468,000 for
the third quarter 1999 while BioMarin did not have a loss from the joint venture
in the third quarter of 1998.

Interest income increased by $494,000 from $230,000 in the third quarter of 1998
to  $724,000  in the  third  quarter  of 1999  due to  increased  cash  reserves
resulting from the IPO on July 23, 1999, a concurrent investment by Genzyme, and
a  convertible  note  financing in April 1999 that  converted at the time of the
initial public offering.  The interest expense on the convertible notes, accrued
at an interest rate of 10% per year,  totaled  $167,000 for the third quarter of
1999.

The net loss was  $2,818,000  ($0.12 per share) in the third quarter of 1998 and
increased to $7,643,000 ($0.24 per share) in the comparable period of 1999.


















                                        9





The Nine Months Ended September 30, 1999 and 1998

For the  nine-month  periods ended  September  30, 1998 and 1999,  revenues were
$141,000 and $4,661,000, respectively. The reasons for this increase in revenues
were the same as described  for the third  quarter  increase in revenues.  Joint
venture  revenues were $3,411,000 and Glyko,  Inc.  revenues were $1,218,000 for
the first nine months of 1999.

Research and  development  expenses  increased from $3,904,000 in the first nine
months  of 1998 to  $18,029,000  in the  comparable  period  of 1999.  Increased
expenses in support of the  Aldurazyme  joint venture with  Genzyme,  the MPS-VI
program and the burn debridement program were the major factors in the growth of
research and development expenses.

Selling,  general and  administrative  expenses increased from $2,772,000 in the
nine  months of 1998 to  $4,759,000  in the  first  nine  months  of 1999.  This
increase   resulted  from  the   consolidation   of  Glyko,   Inc.  selling  and
administrative  expenses in 1999  expenses,  an increase in staffing in BioMarin
administration  in 1999 compared to 1998, and an increase in facilities  expense
charged to  administration  in 1999.  The increase in  administrative  staff and
related expense was necessary to support expanded operations.

BioMarin's  equity in the loss of its joint venture with Genzyme was  $1,023,000
for the first  nine  months of 1999  while  there was no loss in the  comparable
period of 1998.

Interest income  increased by $708,000 from $469,000 in the first nine months of
1998 to $1,177,000  in the first nine months of 1999  primarily due to increased
cash reserves  resulting  from a convertible  note  financing in April 1999, the
initial public offering, and a concurrent private placement with Genzyme in July
1999.  The  interest  expense  accrued on the  convertible  notes prior to their
conversion in the initial public offering totaled $720,000.

The net loss was $6,066,000 ($0.28 per share) and $19,034,000  ($0.67 per share)
for the first nine months of 1998 and 1999, respectively.

Liquidity and Capital Resources

We have  financed our  operations  since our inception by the issuance of common
stock and  convertible  notes and the  related  interest  income  earned on cash
balances available for short-term  investment.  Since inception,  we have raised
aggregate  estimated net proceeds of $125.5 million after the IPO and concurrent
Genzyme  investment.  We  were  initially  funded  by GBL  with  a $1.5  million
investment.  We have since  raised  additional  capital  from the sale of common
stock in private  placements,  the sale of  promissory  notes  convertible  into
common  stock,  an  investment  of $8.0  million by Genzyme as part of our joint
venture  with them,  an initial  public  offering  including  the  underwriters'
over-allotment exercise and the concurrent $10 million Genzyme investment in our
Company.

Our combined cash,  cash  equivalents and short-term  investments  totaled $72.2
million at September  30, 1999,  an increase of $60.8  million from December 31,
1998.  The primary  source of cash was the  issuance of common stock at our IPO,
generating   $60.0   million  of  net  proceeds   including   the   underwriters
over-allotment.  The primary use of cash during the nine months ended  September
30, 1999 was to finance  operations and to purchase  leasehold  improvements and
equipment.  For the nine months ended  September 30, 1999,  operations used $9.8
million,  we purchased  $19.1 million of leasehold  improvements  and equipment,
invested $5.3 million in the joint venture  (which was consumed in joint venture
operations) and purchased $1.5 million of assets from Oxford GlycoSciences.

From our inception through  September 30, 1999, we have purchased  approximately
$25.6  million of  leasehold  improvements  and  equipment.  We expect  that our
investment in leasehold  improvements and equipment will increase  significantly
during the next two years because we will provide facilities and equipment for a
larger staff and increase manufacturing capacity.

As part of the acquisition of Glyko, Inc., we acquired  in-process  research and
development  projects,  the value of which  was  expensed  as a  portion  of the
purchase price at the time of the acquisition. The 11 projects acquired are each
relatively small and can be grouped into two categories,  analytic  projects and
diagnostic projects.


                                       10






The analytic projects are intended to expand the analytic product line by adding
new enzymes for  reagent  sales,  new kits for  agricultural  applications,  new
instrument  capabilities  for protein  analysis and a major  upgrade of software
capabilities. At the time of the acquisition of Glyko, Inc., all of the analytic
projects  had  completed  feasibility  work and the software  projects  were 75%
complete and have since been completed. The development of specialized materials
supporting instrument  capabilities is deemed to be the most difficult technical
hurdle for the completion and  commercialization  of the analytic projects.  The
fair  value  of the  analytic  projects  was  $1.7  million  at the  time of the
acquisition.

The  diagnostic  projects  are  intended to expand a product  line based on very
precise measurements of the level of complex carbohydrates in blood and urine as
indicators of serious disease conditions including heart disease, kidney disease
and  mucopolysaccharidoses  or carbohydrate storage diseases. At the time of the
Glyko, Inc. acquisition,  preliminary  feasibility work had been done for all of
the projects and a software  project was well advanced as to programming,  which
has since been  completed.  The  development of new more sensitive  carbohydrate
chemistry techniques is deemed to be the most difficult technical hurdle for the
completion and  commercialization of the diagnostic products.  The fair value of
the diagnostic projects was $924,000 at the time of the acquisition.

As of September 30, 1999, we had expended to date approximately  $695,000 on the
in-process  research and  development  projects  and $725,000 on the  diagnostic
projects.  If all acquired in-process research and development  projects proceed
to completion,  we expect to spend approximately  $415,000 in incremental direct
expense to  complete  the  analytic  projects in phases  over  approximately  18
months. We expect to spend approximately $1.0 million to complete the diagnostic
projects in phases  completed  from 6 to 18 months in the future.  None of these
projects have been terminated to date.

Since the acquisition of these in-process research and development  projects one
year ago,  there have been no subsequent  developments  which  indicate that the
completion and commercialization of either of the projects are less likely to be
completed  on the  original  planned  schedule or less likely to be a commercial
success.

We have  made and plan to make  substantial  commitments  to  capital  projects,
including the Aldurazyme(TM)  manufacturing facility in Torrance,  California, a
manufacturing facility in Novato, and new research and development facilities in
Novato.

In September 1998, we established a joint venture with Genzyme for the worldwide
development and  commercialization of Aldurazyme(TM) for the treatment of MPS-I.
We will share expenses and profits from the joint venture  equally with Genzyme.
Genzyme  purchased  $8.0 million in common stock upon signing the  agreement and
$10.0  million  of  common  stock at the IPO price of $13 per share in a private
placement concurrent with the IPO. Genzyme has committed to pay us an additional
$12.1  million  upon  approval  of  the  biologics   license   application   for
Aldurazyme(TM).

On October 7, 1998, we purchased Glyko, Inc. from GBL for an aggregate  purchase
price of $14.5 million.  The purchase price was paid by 2,259,039  shares of our
common  stock,  our  assumption  of certain  stock  options held by Glyko,  Inc.
employees which were  exercisable into a maximum of 255,540 shares of our common
stock and $500 in cash.

On April 13, 1999,  we sold a total of $26.0 million of  convertible  promissory
notes.  The notes were converted into 2,672,020  shares of our common stock at a
conversion price of $10.00 per share concurrent with the IPO.

In May 1999, Glyko, Inc. acquired key assets of the Biochemical Research Reagent
Division  of Oxford  GlycoSciences  Plc.  The  acquisition  was made to increase
Glyko,  Inc.'s  product  offerings  and was  valued  from $1.5  million  to $2.1
million, depending on the future sales of the acquired products.

In July 1999, we completed our initial  public  offering of 4,500,000  shares of
our common stock at $13 per share  raising net proceeds of  approximately  $51.9
million.  In a private placement  concurrent with the IPO, Genzyme purchased $10
million of our common stock (769,230 shares) at the IPO price of $13.


                                       11






In August 1999,  the  underwriters  exercised  their  over-allotment  option for
675,000  shares at the IPO price of $13 raising  additional net proceeds of $8.1
million.

We expect our current funds to last for a period of at least12 months.  Until we
can  generate  sufficient  levels  of cash  from our  operations,  we  expect to
continue to finance future cash needs through:

    .  The sale of equity securities

    .  Equipment-based financing

    .  Collaborative agreements with corporate partners

We do not expect to generate  positive  internal cash flow for at least the next
two years because we expect to increase  operational  expenses and manufacturing
investment  for the joint  venture  and to  increase  research  and  development
activities, including:

    .  Preclinical studies, clinical trials and regulatory review

    .  Commercialization of our drug candidates

    .  Development of manufacturing operations

    .  Process development

    .  Scale-up of manufacturing facilities

    .  Sales and marketing activities

We anticipate a need for additional  financing to fund the future  operations of
its business,  including the  commercialization of our drug candidates currently
under  development.  We cannot  assure  you that  additional  financing  will be
obtained or, if obtained, will be available on reasonable terms.

Our future capital requirements will depend on many factors,  including, but not
limited to:

    .  The progress of our research and development programs

    .  The progress of preclinical studies and clinical trials

    .  The time and cost involved in obtaining regulatory approvals

    .  Scaling up, installing and validating manufacturing capacity

    .  Competing technological and market developments

    .  Changes and developments in collaborative, licensing and other
        relationships

    .  The development of commercialization activities and arrangements

    .  The leasing and build-out of additional facilities

    .  The purchase of additional capital equipment

We plan to  continue  our  policy of  investing  available  funds in  government
securities and investment  grade,  interest-bearing  securities,  primarily with
maturities  of one  year or  less.  We do not  invest  in  derivative  financial
instruments, as defined by Statement of Financial Accounting Standards No. 119.

                                       12






Impact of Year 2000

The following  constitutes "Year 2000 Readiness  Disclosure" under the Year 2000
Information and Readiness Disclosure Act of 1998.

We are aware of the potential  problems  associated  with computer  programs and
systems  that  use only  two  digits  to  identify  the year in the date  field.
Application  and  system  programs  may be  unable  to  correctly  process  date
information for dates after December 31, 1999. This year 2000 defect could cause
the disruption or failure of computer systems. The year 2000 defect could affect
both our internal  information  technology  systems and other functional systems
that use embedded  computer  programs for control or other purposes.  The defect
could also affect the  information  technology and other  functional  systems of
suppliers  of products  and  services to us. The defect could affect the overall
economy and have a significant impact on us.

We have  formed a team to review  and  resolve  those  aspects  of the year 2000
problem  which are within our direct  control and adjust to or  influence  those
aspects  which are not within  our direct  control.  The team has  reviewed  our
software  products  (including those under  development) and determined that our
software  products  do not use  date  data  and are  year  2000  compliant.  Our
biopharmaceutical  products  do not have any year  2000  exposure.  The team has
reviewed  the year 2000  compliance  status of our  major  internal  information
technology  programs  and  systems  used  for  administrative  requirements  and
determined  that these  systems are year 2000  compliant.  We have  reviewed the
computer  systems  used to control our  analytical  instruments  and  production
equipment. Due to the recent design of our equipment, the embedded computers are
year 2000  compliant.  We believe that the expense of repairing or replacing any
undetected  year 2000  defects  will not be  material.  We  believe  that we can
resolve  our  internal  year 2000  compliance  issues  before the year 2000 with
expenditures  that are  currently  estimated  not to be  material.  If we do not
achieve on a timely basis year 2000  compliance  for our internal  systems,  our
operations and business could be adversely affected.

With respect to our suppliers,  we do not currently process orders, payments and
other business communications electronically from computer to computer. However,
if our  suppliers'  and  ultimate  customers'  own systems are not yet year 2000
compliant,  their disruptions could have a significant direct or indirect impact
on our  operations  and business.  The following  consequences  of the year 2000
problem could disrupt our business:

    .  Financial institutions may not be able to process checks,accept deposits,
        provide records, process wire transfers, provide stock
        ownership and transfer records, or facilitate many other
        financial transactions and services.

    .  Suppliers may not be able to process orders, manufacture products,
        deliver in accordance with  production schedules, or in general
        provide the current level of timely products and services.

    .  Voice and data communication systems used by us and our customers and
        suppliers might be disrupted.

    .  Health care suppliers and third-party payors may be unable to process
        patient records, add to or  modify the content of their pharmacy
        authorizations, accept or make payments, and handle the many  other
        data requirements of the modern health care system. The added costs
        for back-up systems, for temporary or emergency fixes and the ongoing
        requirements to handle critical functions on a timely basis
        may delay our introduction of new drugs and therapeutic practices.








                                       13






                                  RISK FACTORS



If we continue to incur operating  losses for a period longer than  anticipated,
we may be unable to continue our operations.

We are in an early stage of development and have operated at a net loss since we
were  formed.  Since we began  operations  in March 1997,  we have been  engaged
primarily in research and development. We have no sales revenues from any of our
drug  products.  As of September  30,  1999,  we had an  accumulated  deficit of
approximately  $34.1 million.  We expect to continue to operate at a net loss at
least six months into 2001.  Our future  profitability  depends on our receiving
regulatory  approval  of our drug  candidates  and our  ability to  successfully
manufacture and market any approved  drugs,  either by ourselves or jointly with
others.  The extent of our future  losses  and the timing of  profitability  are
highly  uncertain.  If we fail to become  profitable  or are  unable to  sustain
profitability on a quarterly or annual basis,  then we may be unable to continue
our operations.

Because of the  relative  small size and scale of our  wholly-owned  subsidiary,
Glyko,  Inc.,  profits  from  products  and  services  offered  by  it  will  be
insufficient to offset the expenses associated with our pharmaceutical business.
As a result,  we expect that operating losses will continue and increase for the
foreseeable future.

If we fail to obtain the capital  necessary  to fund our  operations  we will be
unable to complete our product development programs.

In the  future,  we may need to raise  substantial  additional  capital  to fund
operations.  We cannot be certain  that any  financing  will be  available  when
needed. If we fail to raise additional  financing as we need it, we will have to
delay or terminate our product development programs.

We expect to continue to spend substantial amounts of capital for our operations
for  the  foreseeable   future.   Activities   which  will  require   additional
expenditures include:

    .  research and development programs

    .  preclinical studies and clinical trials

    .  regulatory processes

    .  establishment of commercial scale manufacturing capabilities and

    .  expansion of sales and marketing activities.

The amount of capital we may need depends on many factors, including:

    .  The progress, timing and scope of our research and development programs

    .  The progress, timing and scope of our preclinical studies and clinical
        trials

    .  The time and cost necessary to obtain regulatory approvals

    .  The time and cost necessary to build our manufacturing facilities and
        obtain the necessary regulatory approvals for those facilities

    .  The time and cost necessary to respond to technological and market
        developments



                                       14






 .  Any changes made or new developments in our existing collaborative,
     licensing and other commercial relationships

 .  Any new collaborative, licensing and other commercial relationships that we
    may establish

Moreover,   our  fixed  expenses  such  as  rent,  license  payments  and  other
contractual  commitments are substantial and will increase in the future.  These
fixed expenses will increase because we may enter into:

    .  additional leases for new facilities and capital equipment

    .  additional licenses and collaborative agreements

    .  additional contracts for consulting, maintenance and administrative
        services

    .  additional expenses associated with being a public company.

We believe that the net proceeds of our initial public  offering,  together with
our available  cash,  cash  equivalents,  short-term  investment  securities and
investment  income,  will  be  sufficient  to meet  our  operating  and  capital
requirements  through at least the next 12  months.  This  estimate  is based on
assumptions  which may prove to be wrong.  As a result,  we may need  additional
financing prior to that time.

If we fail to obtain regulatory approval to commercially manufacture or sell any
of our future drug  products,  or if  approval is delayed,  we will be unable to
generate revenue from the sale of our products.

We must  obtain  regulatory  approval  to market our  products  in the U.S.  and
foreign jurisdictions.

We must obtain  regulatory  approval before marketing or selling our future drug
products. In the United States, we must obtain U.S. Food and Drug Administration
(FDA) approval for each drug that we intend to  commercialize.  The FDA approval
process is  typically  lengthy and  expensive,  and  approval is never  certain.
Products  distributed abroad are also subject to foreign government  regulation.
None of our drug products has received  regulatory  approval to be  commercially
marketed and sold. If we fail to obtain regulatory approval we will be unable to
market and sell our future  drug  products.  We have  several  drug  products in
various  stages of preclinical  and clinical  development.  Aldurazyme(TM),  our
first drug product, is not expected to be commercially  available until at least
2000.  Our other drug product will not be  commercially  available  for at least
several more years.  Because of the risks and uncertainties in biopharmaceutical
development,  our drug candidates could take a significantly longer time to gain
regulatory  approval  than we expect or may never gain  approval.  If regulatory
approval is delayed our management's  credibility,  the value of our company and
our operating results may be adversely affected.

To obtain regulatory  approval to market our products,  preclinical studies and
costly and  lengthy  clinical  trials  may be  required  and the  results of the
studies and trials are highly uncertain.

As part of the FDA  approval  process,  we  must  conduct,  at our own  expense,
preclinical  studies  on  animals  and  clinical  trials  on humans on each drug
candidate.  We expect the number of preclinical studies and clinical trials that
the FDA will require will vary  depending  on the drug  product,  the disease or
condition the drug is being developed to address and  regulations  applicable to
the particular drug. We may need to perform multiple  preclinical  studies using
various doses and formulations before we can begin clinical trials,  which could
result in delays in our ability to market any of our drug products.

Furthermore,  even if we obtain  favorable  results  in  preclinical  studies on
animals,  the  results  in  humans  may be  different.  After we have  conducted
preclinical  studies in animals we must  demonstrate  that our drug products are
safe and  effective  for use on the target  human  patients  in order to receive
regulatory  approval  for  commercial  sale.  Adverse or  inconclusive  clinical
results  would stop us from  filing for  regulatory  approval  of our  products.
Additional  factors that can cause delay or termination  of our clinical  trials
include:

    .  Slow patient enrollment

    .  Longer treatment time required to demonstrate efficacy

                                       15





    .  Lack of sufficient supplies of the drug candidate

    .  Adverse medical events or side effects in treated patients

    .  Lack of effectiveness of the drug candidate being tested

Typically,  if a drug product is intended to treat a chronic  disease safety and
efficacy data must be gathered over an extended period of time which ranges from
six months to three years. In addition,  clinical trials on humans are typically
conducted in three  phases.  The FDA  generally  requires  two pivotal  clinical
trials  that  demonstrate  substantial  evidence  of  safety  and  efficacy  and
appropriate dosing in a broad patient population at multiple sites to support an
application for regulatory approval.  If a drug is intended for the treatment of
a serious or life-threatening  condition and the drug demonstrates the potential
to  address  unmet  medical  needs  for this  condition,  a single  trial may be
sufficient  to prove safety and efficacy  under the FDA's  Modernization  Act of
1997.

Our strategy to conduct  only one  clinical  trial on a small number of patients
for products  developed to treat  genetic  disorders  may not be  sufficient  to
obtain regulatory approval.

We  believe  that our  enzyme  drug  products  will be  regulated  by the FDA as
biologics  rather  than  drugs  because  they  are  manufactured  by  biological
processes.  Our  strategy  for  the  development  of  therapeutics  for  genetic
disorders is to conduct  only one clinical  trial on a small number of patients,
which  would  then  be the  basis  for our  submission  of a  biologics  license
application  (BLA) to the FDA.  For  example,  at the end of  October  1998,  we
completed a six-month  evaluation  of ten  patients on our first drug  candidate
Aldurazyme(TM).  Because 12-month data will be available,  the FDA has requested
that we evaluate data for these patients for the 12-month period rather than the
six-month period which formed the basis of our initial  evaluation.  In addition
the FDA has also  requested that we evaluate this data using other criteria that
may  demonstrate  that the  surrogate  endpoints  are a  predictor  of  clinical
benefit. We are currently performing this evaluation.  We cannot assure you that
this evaluation  will support our findings with regard to the primary  endpoints
in the clinical  trial.  If this  analysis  does not support our  findings  with
regard to the primary endpoints,  or if the surrogate endpoints do not predict a
clinical benefit, it could delay the filing of the biologics license application
and  could  jeopardize  FDA  approval  of  Aldurazyme(TM).  The FDA may  request
additional  trials  to be  conducted.  If we have to  conduct  further  clinical
trials,  whether for  Aldurazyme(TM) or other products we develop in the future,
it would significantly increase our expenses and delay marketing of our product.
Also,  the results of initial  smaller  clinical  trials  could  differ from the
results obtained from subsequent more extensive  long-term trials. A significant
difference  in the results of multiple  clinical  trials  could cause the FDA to
require still more clinical trials which would  significantly delay the approval
process.

The fast track designation for  Aldurazyme(TM) may not actually lead to a faster
review process.

Although  Aldurazyme(TM)  has  obtained  a fast  track  designation,  we  cannot
guarantee a faster review process or faster approval  compared to the normal FDA
procedures.  If  Aldurazyme(TM)  is  approved,  we will be required to conduct a
study after we obtain approval of Aldurazyme(TM) to demonstrate that the primary
endpoints  used in our single study are  reasonably  likely to predict  clinical
benefits  to the  patients.  If this  post-approval  study  fails to verify  the
clinical benefit of Aldurazyme(TM)  or demonstrates  that  Aldurazyme(TM) is not
safe or  effective,  our FDA approval  can be  withdrawn on an expedited  basis.
Furthermore, if adverse effects are identified after marketing, FDA approval may
be rapidly revoked and we could not market the drug.

We will not be able to sell our products if we fail to comply with manufacturing
regulations.

Before we can begin  commercially  manufacturing  our  products  we must  obtain
regulatory  approval of our  manufacturing  facility and  process.  In addition,
manufacture  of our drug  products  must  comply  with the  FDA's  current  Good
Manufacturing   Practices   regulations,   commonly  known  as  cGMP.  The  cGMP
regulations  govern quality control and  documentation  policies and procedures.
Our manufacturing  facilities are continuously subject to inspection by the FDA,
the State of California  and foreign  regulatory  authorities,  before and after
product  approval.  Because we are  currently in the process of  developing  the
manufacturing site and process for commercial manufacture of Aldurazyme(TM), our
facility has not yet been inspected by any state or federal governmental entity.
We cannot guarantee that BioMarin, or any potential third- party manufacturer of
our drug  products,  will be able to  comply  with  cGMP  regulations.  Material
changes to the  manufacturing  processes  after  approvals have been granted are
also subject to review and approval by the FDA or other regulatory agencies.

                                       16





We currently have a contract with Harbor-UCLA  Research and Education  Institute
to  manufacture  Aldurazyme(TM)  in limited  quantities  for use in  preclinical
studies and clinical trials. In order to produce initial commercial requirements
for  Aldurazyme(TM)  in our  facility  we will  have to prove  that the  product
manufactured  at our  facility  is  comparable  to the  clinical  trial  product
produced in the Harbor- UCLA facility.  This will require laboratory testing and
may  require  clinical  trials.  We must  pass  FDA and  state  inspections  and
manufacture three process  qualification  batches to final  specifications under
cGMP controls before the  Aldurazyme(TM)  BLA can be approved.  We cannot assure
you that we will pass the inspections in a timely manner, if at all.

If we fail to obtain orphan drug  exclusivity for our products,  our competitors
may sell products to treat the same conditions and our revenues may be reduced.

As part of our  business  strategy,  we  intend  to  develop  drugs  that may be
eligible for FDA orphan drug designation. Under the Orphan Drug Act, the FDA may
designate a product as an orphan  drug if it is a drug  intended to treat a rare
disease or condition,  defined as a patient population of less than 200,000. The
company that  obtains the first FDA approval for a designated  orphan drug for a
given rare disease receives  marketing  exclusivity for use of that drug for the
stated  condition for a period of seven years.  However,  different drugs can be
approved for the same condition.

Because the extent and scope of patent  protection  for our drug  candidates  is
limited, orphan drug designation is particularly important for our products that
are eligible  for orphan drug  designation.  We plan to rely on the  exclusivity
period under the orphan drug designation to maintain a competitive  position. If
we do not obtain orphan drug  exclusivity for any one of our drug products,  our
competitors may then sell the same drug to treat the same condition.

We received orphan drug designation from the FDA for Aldurazyme(TM) in September
1997. In February  1999, we received  orphan drug  designation  from the FDA for
BM102.  Even if we obtain orphan drug  designation,  we cannot guarantee that we
will be the first to obtain marketing approval for any orphan indication or that
exclusivity would effectively protect the product from competition.  Orphan drug
designation  does not  shorten the  development  or FDA review time of a drug so
designated  nor give  the  drug any  advantage  in the FDA  review  or  approval
process.

Because  the  target  patient  populations  for our  products  are small we must
achieve  significant  market  share and obtain high per  patient  prices for our
products to achieve profitability.

Our initial drug candidates target disorders with small patient populations.  As
a result,  our prices must be high enough to recover our  development  costs and
achieve profitability.  For example, two of our initial drug products in genetic
disorders,  Aldurazyme(TM)  and BM102,  target  patients  with MPS-I and MPS-VI,
respectively. We estimate that there are approximately 3,400 patients with MPS-I
and 1,100 patients with MPS-VI in the developed  world.  We believe that we will
need to market worldwide to achieve  significant  market share. In addition,  we
are developing other drug candidates to treat conditions,  such as other genetic
diseases and serious burns, with small patient populations. We cannot be certain
that we will be able to obtain  sufficient market share for our drug products at
a price high enough to justify our product development efforts.

If we fail to obtain an adequate level of reimbursement for our drug products by
third-party  payors  there  would  be no  commercially  viable  markets  for our
products.

The course of treatment for patients with MPS-I using Aldurazyme(TM) is expected
to  be  expensive.  We  expect  patients  to  need  treatment  throughout  their
lifetimes. We expect that families of patients will not be capable of paying for
this  treatment  themselves.  There will be no  commercially  viable  market for
Aldurazyme(TM) without reimbursement from third-party payors.

Third-party  payors,  such  as  government  or  private  health  care  insurers,
carefully  review  and  increasingly  challenge  the price  charged  for  drugs.
Reimbursement  rates from private  companies vary  depending on the  third-party
payor,  the  insurance  plan  and  other  factors.   Reimbursement   systems  in
international   markets  vary  significantly  by  country  and  by  region,  and
reimbursement  approvals  must be obtained  on a  country-by-country  basis.  We
cannot be certain  that  third-party  payors will pay for the costs of our drugs
and the courses of treatment.  Even if we are able to obtain  reimbursement from
third-party payors, we cannot be certain that reimbursement rates will be enough
to allow us to profit from sales of our drugs.
                                       17






We currently have no expertise obtaining reimbursement. We expect to rely on the
expertise of our partner Genzyme to obtain reimbursement for Aldurazyme(TM).  We
cannot predict what the reimbursement  rates will be. In addition,  we will need
to develop our own reimbursement  expertise for future drug candidates unless we
enter into collaborations with other companies with the necessary expertise.

We expect that in the future reimbursement will be increasingly  restricted both
in the United States and internationally. The escalating cost of health care has
led  to  increased  pressure  on the  health  care  industry  to  reduce  costs.
Governmental  and private  third-party  payors have proposed health care reforms
and cost reductions. A number of federal and state proposals to control the cost
of health  care,  including  the cost of drug  treatments  have been made in the
United States.  In some foreign  markets,  the  government  controls the pricing
which would affect the profitability of drugs.  Current  government  regulations
and  possible  future  legislation  regarding  health care may affect our future
revenues  from  sales of our drugs and may  adversely  affect our  business  and
prospects.

If we are  unable to protect  our  proprietary  technologywe  may not be able to
compete as effectively.

Where  appropriate,  we  seek  patent  protection  for  certain  aspects  of our
technology.  Meaningful  patent  protection may not be available for some of the
enzymes we are developing,  including Aldurazyme(TM) and BM102. If we must spend
significant time and money protecting our patents, designing around patents held
by others or licensing, for excessively large fees, patents or other proprietary
rights held by others, our business and prospects may be harmed.

The patent  positions  of  biotechnology  companies  are  extremely  complex and
uncertain.  The scope and extent of patent  protection  for some of our products
are particularly uncertain because key information on some of the enzymes we are
developing  has existed in the public domain for many years.  Other parties have
published the  structure of the enzymes,  the methods for purifying or producing
the enzymes or the methods of treatment.  The composition and genetic  sequences
of animal  and/or  human  versions of many of our enzymes,  including  those for
Aldurazyme(TM)  and BM102, have been published and are in the public domain. The
composition  and  genetic  sequences  of other  MPS  enzymes  which we intend to
develop as products have also been  published.  Publication of this  information
may prevent us from obtaining composition of matter patents, which are generally
believed to offer the strongest patent protection.  For enzymes with no prospect
of composition of matter patents, we will depend on orphan drug status.

In  addition,  our owned and  licensed  patents and patent  applications  do not
ensure  the  protection  of our  intellectual  property  for a  number  of other
reasons:

    .  We do not know whether our patent applications will result in actual
       patents. For example, we may not have developed a method for treating
       a disease before others developed similar methods.

    .  Competitors may interfere with our patent process in a variety of
       ways. Competitors may claim that they invented the claimed invention
       prior to us. Competitors may also claim that we are infringing on
       their patents and therefore cannot practice our technology as claimed
       under our patent. Competitors may also contest our patents by showing
       the patent examiner that the invention was not original, novel or was
       obvious. As a Company, we have no meaningful experience with
       competitors interfering with our patents orpatent applications.

    .  Even if we receive a patent, it may not provide much practical
       protection. If we receive a patent with a narrow scope, then it will
       be easier for competitors to design products that do not infringe on
       our patent.

    .  Enforcing patents is expensive and may absorb significant time by our
       management. In litigation, a competitor could claim that our issued
       patents are not valid for a number of reasons. If the court agrees,
       we would lose that patent.
                                       18





In addition, competitors also seek patent protection for their technology. There
are many patents in our field of technology,  and we cannot guarantee that we do
not infringe on those patents or that we will not infringe on patents granted in
the future.  If a patent holder believes our product  infringes on their patent,
the patent holder may sue us even if we have received patent  protection for our
technology.  If someone  else claims we infringe on their  technology,  we would
face a number of issues, including:

    .  Defending a lawsuit takes significant time and can be very expensive.

    .  If the court decides that our product infringes on the competitor's
       patent, we may have to pay substantial damages for past infringement.

    .  The court may prohibit us from selling or licensing the product
       unless the patent holder licenses the patent to us. The patent holder
       is not required to grant us a license. If a license is available, we
       may have to pay substantial royalties or grant cross-licenses to our
       patents.

    .  Redesigning our product so it does not infringe may not be possible
       and could require substantial funds and time.

It is also unclear  whether our trade  secrets will provide  useful  protection.
While we use reasonable  efforts to protect our trade secrets,  our employees or
consultants  may  unintentionally  or  willfully  disclose  our  information  to
competitors. Enforcing a claim that someone else illegally obtained and is using
our trade secrets, like patent litigation,  is expensive and time consuming, and
the outcome is unpredictable.  In addition, courts outside the United States are
sometimes  less  willing  to  protect  trade  secrets.   Our   competitors   may
independently develop equivalent knowledge, methods and know-how.

We may  also  support  and  collaborate  in  research  conducted  by  government
organizations  or by  universities.  We cannot guarantee that we will be able to
acquire  any  exclusive  rights to  technology  or products  derived  from these
collaborations.  If we do not  obtain  required  licenses  or  rights,  we could
encounter delays in product  development while we attempt to design around other
patents or even be prohibited from developing, manufacturing or selling products
requiring these licenses. There is also a risk that disputes may arise as to the
rights to technology or products developed in collaboration with other parties.

If our joint  venture  with  Genzyme  were  terminated,  we could be barred from
commercializing  Aldurazyme(TM)  or our ability to commercialize  Aldurazyme(TM)
would be delayed.

We are relying on Genzyme to apply the  expertise it has  developed  through the
launch and sale of Ceredase(R) and Cerezyme(R)  enzymes for Gaucher  disease,  a
rare  genetic   disorder,   to  the  marketing  of  our  initial  drug  product,
Aldurazyme(TM).   Because  it  is  our  initial  product,   our  operations  are
substantially  dependent  upon the  development  of  Aldurazyme(TM).  We have no
experience  selling,  marketing or obtaining  reimbursement  for  pharmaceutical
products.  In addition,  without  Genzyme we would be required to pursue foreign
regulatory  approvals.  We have no  experience  in  seeking  foreign  regulatory
approvals.

We cannot  guarantee  that  Genzyme  will  devote  the  resources  necessary  to
successfully market Aldurazyme(TM).  In addition, either party may terminate the
joint venture for specified reasons, including if the other party is in material
breach of the  agreement or has  experienced a change of control or has declared
bankruptcy  and  also is in  breach  of the  agreement.  Either  party  may also
terminate the agreement  upon one year prior written notice for any reason after
the earlier of December  31, 2000 or after the joint  venture has  received  the
FDA's  approval  of  the  biologics  license   application  for  Aldurazyme(TM).
Furthermore,  we may terminate the joint venture if Genzyme fails to fulfill its
contractual  obligation  to pay us  $12.1  in  cash  upon  the  approval  of the
biologics license application for Aldurazyme(TM).

Upon  termination  of the joint venture one party must buy out the other party's
interest in the joint  venture.  The party who buys out the other will then also
obtain,  exclusively,  all rights to Aldurazyme(TM) and any related intellectual
property and regulatory approvals.

                                       19





If the joint venture is terminated by Genzyme for a breach on our part,  Genzyme
would be  granted,  exclusively,  all of the  rights to  Aldurazyme(TM)  and any
related intellectual property and regulatory approvals and would be obligated to
buy out our interest in the joint venture.  We would then  effectively be unable
to develop and commercialize Aldurazyme(TM).  If we terminated the joint venture
for a breach by Genzyme,  we would be obligated to buy out Genzyme's interest in
the  joint  venture  and,  we  would  then be  granted  all of these  rights  to
Aldurazyme(TM)   exclusively.   While  we  could   then   continue   to  develop
Aldurazyme(TM), that development would be slowed because we would have to divert
substantial capital to buy out Genzyme's interest in the joint venture and would
then have to search for a new partner to commercialize the product and to obtain
foreign regulatory approvals or to develop these capabilities ourselves.

If the joint venture is terminated by us without  cause,  Genzyme would have the
option,  exercisable  for one year, to  immediately  buy out our interest in the
joint  venture  and  obtain  all rights to  Aldurazyme(TM)  exclusively.  If the
agreement is  terminated  by Genzyme  without  cause,  we would have the option,
exercisable for one year, to immediately buy out Genzyme's interest in the joint
venture and obtain these  exclusive  rights.  In event of termination of the buy
out option without exercise by the non-terminating party as described above, all
right and title to Aldurazyme(TM) is to be sold to the highest bidder,  with the
proceeds to be split equally between Genzyme and us.

If the joint venture is terminated by us because Genzyme fails to make the $12.1
million payment to us upon FDA approval of the biologics license application for
Aldurazyme(TM),  we would be  obligated to buy  Genzyme's  interest in the joint
venture and would obtain all rights to Aldurazyme(TM)  exclusively. If the joint
venture is terminated by either party because the other declared  bankruptcy and
is also in breach of the agreement,  the terminating party would be obligated to
buy out the other and would obtain all rights to Aldurazyme(TM)  exclusively. If
the joint venture is terminated by a party because the other party experienced a
change of control,  the  terminating  party shall  notify the other  party,  the
offeree,  of its intent to buy out the  offeree's  interest in the joint venture
for a stated amount set by the terminating party at its discretion.  The offeree
must then  either  accept  this  offer or agree to buy the  terminating  party's
interest in the joint  venture on those same  terms.  The party who buys out the
other would then have exclusive rights to Aldurazyme(TM).

We cannot  assure you that if the joint venture were  terminated  and if we were
obligated,  or given the  option,  to buy out  Genzyme's  interest  in the joint
venture,  and  gain  exclusive  rights  to  Aldurazyme(TM),  that we  will  have
sufficient  funds to do so or that we will be able to obtain the financing to do
so.  If we fail to buy out  Genzyme's  interest  we may be held in breach of the
agreement and may lose any claim to the rights to Aldurazyme(TM) and the related
intellectual  property and regulatory  approvals.  We would then  effectively be
prohibited from developing and commercializing the product.

Termination  of the joint venture  where we retain the rights to  Aldurazyme(TM)
could  cause us  significant  delays in  product  launch in the  United  States,
difficulties  in obtaining  third-party  reimbursement  and delays or failure to
obtain  foreign  regulatory  approval,  any of which could hurt our business and
results of operations.  Since Genzyme funds 50% of the joint venture's operating
expenses, the termination of the joint venture would double our financial burden
and reduce the funds available to us for other product programs.

If we are unable to manufacture  our drug products in sufficient  quantities and
at  acceptable  cost,  we may be unable to meet demand for our products and lose
potential revenues.

We have no  experience  manufacturing  drug  products  in  volumes  that will be
necessary to support  commercial sales. Our unproven  manufacturing  process may
not meet initial expectations as to schedule,  reproducibility,  yields, purity,
costs,   quality,  and  other  measurements  of  performance.   Improvements  in
manufacturing  processes  typically are very  difficult to achieve and are often
very expensive. We cannot know with any certainty how long it might take to make
improvements if it became  necessary to do so. If we contract for  manufacturing
services  with an  unproven  process,  our  contractor  is  subject  to the same
uncertainties, high standards and regulatory controls.


                                       20





If we are unable to establish and maintain commercial scale manufacturing within
our planned time and cost  parameters,  sales of our products and our  financial
performance will be adversely affected.

We may  encounter  problems  with any of the following if we attempt to increase
the scale or size of manufacturing:

    .  Design, construction and qualification of manufacturing facilities
       that meet regulatory requirements

    .  Production yields

    .  Purity

    .  Quality control and assurance

    .  Shortages of qualified personnel

    .  Compliance with FDA regulations

We are developing a total of 43,000 square feet of space at two facilities,  one
in Novato  and one in  Torrance,  for the  manufacture  of  Aldurazyme(TM).  The
construction and  qualification of these facilities may take longer than planned
and the actual  construction  costs of these facilities may be higher than those
which we have budgeted.  We expect that the manufacturing  process of all of our
new products, including BM102, will also require lengthy development time before
we can begin manufacturing them in commercial quantity. Even if we can establish
this  capacity,   we  cannot  be  certain  that  manufacturing   costs  will  be
commercially reasonable, especially if reimbursement is substantially lower than
expected.

In  order  to  achieve  our  product  cost  targets  we must  develop  efficient
manufacturing processes either by

    .  improving the colonies of cells which have a common genetic make-up,
       or cell lines,

    .  improving the processes licensed from others, or

    .  developing a recombinant cell line and production processes.

A recombinant  cell line is a cell line with foreign DNA inserted  which is used
to produce a foreign  protein  that it would not have  otherwise  produced.  The
development  of a stable,  high  production  cell  line for any given  enzyme is
risky,  expensive  and  unpredictable  and may not yield  adequate  results.  In
addition, the development of protein purification processes is difficult and may
not produce the high purity required with acceptable  yield and costs. If we are
not  able to  develop  efficient  manufacturing  processes,  the  investment  in
manufacturing  capacity sufficient to satisfy market demand will be much greater
and will  place  heavy  financial  demands  upon us.  If we do not  achieve  our
manufacturing cost targets, we will have lower margins and reduced profitability
in commercial production and greater losses in manufacturing start-up phases.

If we are unable to increase our marketing and  distribution  capabilities or to
enter into  agreements  with third  parties  to do so, our  ability to  generate
revenues will be diminished.

If we cannot increase our marketing  capabilities either by developing our sales
and marketing organization or by entering into agreements with others, we may be
unable to successfully  sell our products.  If we are unable to effectively sell
our drug products, our ability to generate revenues will be diminished.

To increase our  distribution and marketing for both our drug candidates and our
Glyko,  Inc.  products,  we will have to increase our current sales force and/or
enter  into  third-party  marketing  and  distribution  agreements.   We  cannot
guarantee that we will be able to hire in a timely manner,  the qualified  sales
and marketing  personnel we need if at all. Nor can we guarantee that we will be
able to enter into any marketing or distribution agreements on acceptable terms,
if at all. If we cannot increase our marketing capabilities as we intend, either
by increasing  our sales force or entering into  agreements  with third parties,
sales of our products may be adversely affected.

                                       21




We  have  entered  into a joint  venture  with  Genzyme  where  Genzyme  will be
responsible for marketing and distributing  Aldurazyme(TM).  We cannot guarantee
that we will be able to establish  sales and  distribution  capabilities or that
BioMarin,  the joint venture or any future  collaborators will successfully sell
any of our drug candidates.

If we fail to compete  successfully,  our revenues and operating results will be
adversely affected.

Our  competitors  may develop,  manufacture  and market  products  that are more
effective or less expensive than ours. They may also obtain regulatory approvals
for their  products  faster  than we can  obtain  them,  including  orphan  drug
designation,  or  commercialize  their products before we do. If our competitors
successfully  commercialize  a product which treats a given rare genetic disease
before we do, we will  effectively  be  precluded  from  developing a product to
treat that disease because the patient  populations of the rare genetic diseases
are so  small.  These  companies  also  compete  with  us to  attract  qualified
personnel and parties for acquisitions,  joint ventures or other collaborations.
They also compete with us to attract academic research  institutions as partners
and to license these institution's  proprietary  technology.  If our competitors
successfully  enter into  partnering  arrangements  or license  agreements  with
academic  research  institutions,  we will then be precluded from pursuing those
specific opportunities.  Since each of these opportunities is unique, we may not
be able to find a substitute. Several pharmaceutical and biotechnology companies
have  already  established  themselves  in the  field  of  enzyme  therapeutics,
including Genzyme, our joint venture partner. These companies have already begun
many drug  development  programs,  some of which may target diseases that we are
also  targeting,   and  have  already  entered  into  partnering  and  licensing
arrangements with academic research institutions, reducing the pool of available
opportunities.

Universities and public and private research  institutions are also competitors.
While  these  organizations  primarily  have  educational  objectives,  they may
develop  proprietary  technology  and acquire  patents  that we may need for the
development  of our drug products.  We will attempt to license this  proprietary
technology,  if  available.  These  licenses  may  not  be  available  to  us on
acceptable  terms,  if at all. We also  directly  compete with a number of these
organizations to recruit personnel, especially scientists and technicians.

We believe that established  technologies  provided by other companies,  such as
laboratory  and testing  services  firms compete with Glyko Inc.'s  products and
services.  For  example,   Glyko,  Inc.'s  FACE  Imaging  System  competes  with
alternative   carbohydrate   analytical   technologies,    including   capillary
electrophoresis,  high-pressure  liquid  chromatography,  mass  spectrometry and
nuclear magnetic  resonance  spectrometry.  These competitive  technologies have
established  customer  bases and are more widely used and accepted by scientific
and  technical   personnel  because  they  can  be  used  for   non-carbohydrate
applications.  Companies  competing with Glyko, Inc. may have greater financial,
manufacturing and marketing resources and experience.

If we fail to manage  our growth or fail to recruit  and retain  personnel,  our
product development programs may be delayed.

Our rapid growth has strained our managerial,  operational,  financial and other
resources.  We expect this growth to continue.  We recently entered into a joint
venture with Genzyme. If we receive FDA approval to market  Aldurazyme(TM),  the
joint  venture  will be required to devote  additional  resources to support the
commercialization of Aldurazyme(TM).

To manage expansion effectively,  we need to continue to develop and improve our
operating and financial  systems,  sales and marketing  capabilities.  We cannot
guarantee  that our systems,  procedures or controls will be adequate to support
our operations or that our management will be able to manage successfully future
market  opportunities  or our  relationships  with  customers  and  other  third
parties.

Our future growth and success depend on our ability to recruit,  retain,  manage
and motivate our employees. The loss of key scientific, technical and managerial
personnel may delay our product development  programs.  Any harm to our research
and development programs would harm our business and prospects.






                                       22






Because of the specialized scientific nature of our business, we rely heavily on
our ability to attract and retain qualified scientific, technical and managerial
personnel. In particular,  the loss of Grant W. Denison, Jr., Chairman and Chief
Executive Officer,  John C. Klock, M.D.,  President and Secretary or Christopher
M.  Starr,   Ph.D.,  Vice  President  for  Research  and  Development  would  be
detrimental  to us. While each of these  individuals  is party to an  employment
agreement  with us,  which  includes  financial  incentives  for each of them to
remain  employed with us, these  agreements  each  terminate in June 2000 and we
cannot guarantee that any of them will remain employed with us beyond that time.
In addition,  these  agreements do not restrict their ability to compete with us
after their employment is terminated. The competition for qualified personnel in
the  biopharmaceutical  field is  intense.  We  cannot be  certain  that we will
continue to attract and retain qualified personnel necessary for the development
of our business.

If product liability lawsuits are successfully  brought against us, we may incur
substantial liabilities.

We are exposed to the potential product liability risks inherent in the testing,
manufacturing  and  marketing  of human drug  treatments.  We  currently  do not
maintain  insurance against product liability  lawsuits.  The joint venture with
Genzyme maintains clinical liability  insurance for Aldurazyme(TM)  which covers
clinical trials of that product,  since their  inception.  Although we intend to
obtain  product  liability  insurance  before our  clinical  trials of BM102 and
shortly before initiating  clinical trials for our other products,  we cannot be
certain that we will be able to obtain adequate insurance coverage. In addition,
we may be subject to claims in connection  with our current  clinical trials for
Aldurazyme(TM) for which current insurance  coverage is not adequate.  We cannot
be certain that if Aldurazyme(TM)  receives FDA approval,  the product liability
insurance  the  joint  venture  will  need to  obtain  in  connection  with  the
commercial  sales of  Aldurazyme(TM)  will be available at a reasonable cost. In
addition,  we cannot be certain  that we can  successfully  defend  any  product
liability  lawsuit  brought  against us. If we are the  subject of a  successful
product  liability  claim which exceeds the limits of any insurance  coverage we
may obtain,  we may incur  substantial  liabilities which would adversely affect
our earnings and financial condition.

If we experience  any problems with Year 2000  compliance  our operations may be
disrupted.

The following is intended to constitute "Year 2000 Readiness  Disclosure"  under
the Year 2000 Information and Readiness Disclosure Act of 1998.

Beginning in the year 2000, the date fields coded in certain  software  products
and  computer  systems  will  need to  accept  four  digit  entries  in order to
distinguish  21st century dates from 20th century dates  (commonly  known as the
year 2000  problem).  It is not clear what  potential  problems may arise as the
biopharmaceutical  industry, and other industries, try to resolve this year 2000
problem.

It is possible that our currently installed computer systems,  software products
or other  business  systems,  or those of our  suppliers  or service  providers,
working either alone or in conjunction with other software or systems,  will not
accept input of, store,  manipulate and output dates for the years 1999, 2000 or
subsequent years without error or interruption.  We have formed a team to review
and resolve  those  aspects of the year 2000  problem that are within our direct
control and adjust to or influence  those aspects that are not within our direct
control.  The team has  reviewed our software  products,  including  those under
development,  and determined that our software products do not use date data and
are year 2000  compliant.  Our  biopharmaceutical  products do not have any year
2000 exposure.  Based on representations from our vendors, the team has reviewed
the year 2000  compliance  status of our major internal  information  technology
programs and systems used for  administrative  requirements  and determined that
they are year 2000 compliant.

Some risks  associated  with the year 2000  problem  are  beyond our  ability to
control,  including the extent to which our suppliers and service  providers can
address  the year 2000  problem.  The  failure  by a third  party to  adequately
address  the year 2000 issue could have an adverse  effect on their  operations,
which could have an adverse effect on us. We are assessing the possible  effects
on our  operations of the possible  failure of our key suppliers and  providers,
contractors and  collaborators to identify and remedy,  if practical,  potential
year 2000 problems.


                                       23





Our stock price may be volatile and your  investment in our stock could suffer a
decline in value.

Our  valuation  and the  stock  price in the  period  since  the IPO have had no
meaningful  relationship to current or historical  earnings,  asset values, book
value or any other criteria based on historical  values. The market price of the
common  stock  will  fluctuate  and may be higher or lower in the  future due to
factors including:

    .  Progress of Aldurazyme(TM) and our other lead drug candidates through
       worldwide regulatory processes, especially Aldurazyme(TM)
       regulatory actions in the United States

    .  Results of clinical trials, announcements of technological
       innovations or new products by us or our competitors

    .  Government regulatory action affecting our drug candidates or our
       competitors' drug candidates in both the United States and foreign
       countries

    .  Developments or disputes concerning patent or proprietary rights

    .  General market conditions for emerging growth and biopharmaceutical
       companies

    .  Economic conditions in the United States or broad

    .  Actual or anticipated fluctuations in our operating results

    .  Broad market fluctuations may cause the market price of our common
       stock to fluctuate

    .  Changes in financial or business estimates by securities analysts

In addition, the value of our common stock may fluctuate because it is listed on
both the Nasdaq  National  Market and the Swiss Exchange New Market.  Because we
have accumulated relatively limited experience since July 23, 1999, in observing
the trading of our stock on two markets,  we cannot be certain  what effect,  if
any,  the dual  listing  will  have on the  future  price of our stock in either
market. Under different conditions in the future,  listing on both exchanges may
increase stock price volatility due to:

    .  trading in different time zones

    .  different ability to buy or sell our stock

    .  different trading volume

In the past,  following  periods of large price  declines  in the public  market
price of a company's  securities,  securities class action  litigation has often
been  initiated  against that  company.  Litigation of this type could result in
substantial costs and diversion of management's  attention and resources,  which
would hurt our business.  Any adverse  determination  in  litigation  could also
subject us to significant liabilities.

If our officers,  directors and largest  stockholder  elect to act together they
may be able to  control  our  management  and  operations,  acting in their best
interests and not necessarily those of other stockholders.






                                       24





Our directors and officers control approximately 17.4% of the outstanding shares
of our common stock. GBL owns 32.7% of the outstanding  shares of capital stock.
Three of six GBL directors  are officers or directors of BioMarin.  As a result,
due to their concentration of stock ownership,  directors and officers, together
with GBL if they act together,  may be able to otherwise  control our management
and  operations,  and  may be  able  to  prevail  on  all  matters  requiring  a
stockholder vote including:

    .  The election of all directors

    .  The amendment of charter documents or the approval of a merger, sale
       of assets or other major corporate transactions

    .  The defeat of any non-negotiated takeover attempt that might
       otherwise benefit the public stockholders

Anti-takeover  provisions in our charter  documents  and under  Delaware law may
make an  acquisition  of us, which may be beneficial to our  stockholders,  more
difficult.

BioMarin is  incorporated  in  Delaware.  Certain  anti-takeover  provisions  of
Delaware law and our charter  documents may make a change in control of BioMarin
more  difficult,  even  if a  change  in  control  would  be  beneficial  to the
stockholders. Our anti-takeover provisions include provisions in the certificate
of incorporation providing that stockholders' meetings may only be called by the
board of directors and a provision in the bylaws providing that the stockholders
may not take action by written  consent.  Additionally,  our board of  directors
have the authority to issue 1,000,000 shares of preferred stock and to determine
the  terms  of  those  shares  of  stock  without  any  further  action  by  the
stockholders.  The  rights of holders  of our  common  stock are  subject to the
rights of the holders of any preferred stock that may be issued. The issuance of
preferred  stock,  could make it more  difficult  for a third party to acquire a
majority  of the  outstanding  voting  stock  of  BioMarin.  Delaware  law  also
prohibits  corporations from engaging in a business combination with any holders
of 15% or more of their  capital  stock  until the holder has held the stock for
three years unless, among other  possibilities,  the board of directors approves
the  transaction.  The board of directors  may use these  provisions  to prevent
changes in the management  and control of our company.  Also,  under  applicable
Delaware law, our board of directors may adopt additional anti-takeover measures
in the future.

Item 3.  Quantitative and Qualitative Disclosure about
Market Risk.

The  Company's  exposure to market risk for  changes in interest  rates  relates
primarily  to  the  Company's  investment  portfolio.  The  Company  places  its
investments  with high credit  issuers and by policy limits the amount of credit
exposure to any one issuer.  As stated in its policy,  the Company  will seek to
improve the safety and  likelihood  of  preservation  of its  invested  funds by
limiting   default  risk  and  market  risk.  The  Company  has  no  investments
denominated  in foreign  country  currencies  and  therefore  is not  subject to
foreign exchange risk.

The  Company  mitigates  default  risk  by  investing  in  high  credit  quality
securities  and by  positioning  its  portfolio  to respond  appropriately  to a
significant  reduction in a credit rating of any investment issuer or guarantor.
The  portfolio  includes only  marketable  securities  with active  secondary or
resale markets to ensure portfolio liquidity.

The  table  below  presents  the  carrying  value for the  Company's  investment
portfolio. The carrying value approximates fair value at September 30, 1999.

Investment portfolio:

          Carrying value(in $ thousands)

          Cash and cash equivalents  $32,585
          Short-term investments      39,307*
          Certificates of deposit        265
             Total                  $ 72,157

* 100% in United States agency securities.

                             25







              PART II. OTHER INFORMATION

Item 1.           Legal Proceedings.                                  None.

Item 2.           Changes in Securities and Uses of Proceeds.

ISSUANCES OF UNREGISTERED SECURITIES

During  the period  covered  by this  report,  registrant  issued the  following
unregistered securities:

From July 1 to  September  30,  1999,  registrant  granted  options to  purchase
373,500 shares of common stock to officers, directors, employees and consultants
in reliance on Rule 701  promulgated  under the Securities Act or in reliance on
the exemption from the regulation  requirements  provided by Section 4(2) of the
Securities Act.

During the period from July 1, to September 30, 1999, options to purchase 10,822
shares of common stock were exercised in reliance on Rule 701 promulgated  under
the  Securities  Act or in  reliance  on the  exemption  from  the  registration
requirements provided by Section 4(2) of the Securities Act.

In a private placement  concurrent with the IPO, Genzyme invested in the Company
$10 million at the IPO price of $13 per share  (769,230  shares of common stock)
in  reliance  on  the  exemption  from  registration  requirements  provided  by
Regulation D promulgated under the Securities Act.

USES OF PROCEEDS

The effective date of registrant's  Registration  Statement on Form S-1 was July
22, 1999.  The offering  commenced on July 23, 1999 and  concluded on August 25,
1999. All of the securities  registered  under the  Registration  Statement were
sold in the offering.  The global  co-coordinators  of the offering were Bank J.
Vontobel & Co. AG and U.S. Bancorp Piper Jaffray Inc. The Registration Statement
covered the sale of 4,500,000  shares of  registrant's  Common Stock,  par value
$0.001  per  share,  as well as the  sale of an  additional  675,000  shares  of
registrant's  Common  Stock  upon  the  exercise  by the  underwriters  of their
over-allotment  option.  The  aggregate  offering  price of the number of shares
registered  in the offering was  $67,275,000.  A total of 5,175,000  shares were
sold in the offering, the aggregate price of which was $67,275,000.

As of November 1, 1999, the expenses  incurred by registrant in connection  with
the  issuance  and   distribution  of  the  securities   registered   (including
underwriters'  discounts  and  commissions)  were  $7.3  million.  No  direct or
indirect  payments  for  these  expenses  were made to  registrant's  directors,
officers  or  persons  owning  10% or more of  registrant's  outstanding  equity
securities.  After deducting these expenses,  registrant's net proceeds from the
offering were $60.0 million.

Item 3.  Defaults upon Senior Securities.                              None.

Item 4.  Submission of Matters to a Vote of Security Holders.          None.

Item 5.  Other Information.                                            None.





                                       26






Item 6.  Exhibits and Reports on Form 8-K.

          (a)  The following  documents are filed as part of this report

                     See Exhibit Index  attached hereto.

          (b)  Reports on Form 8K
                     No reports  were filed on Form 8-K during the three  months
                      ended September 30, 1999.













































                                       27






                                    SIGNATURE

          Pursuant to the  requirements of the Securities  Exchange Act of 1934,
     the  registrant  caused  this  Report  to be  signed  on its  behalf by the
     undersigned, thereunto duly authorized.



                                                BIOMARIN PHARMACEUTICAL INC.


Dated: November 12, 1999                        By:  \s\ Raymond W. Anderson
- ----------------------------------------        ------------------------------
                                                Raymond W. Anderson
                                                Chief Financial Officer and
                                                V.P. Finance and Administration





































                                       28







                                  EXHIBIT INDEX

 Exhibit
 Number   Description of Document
- --------  -------------------------------


      1.1 Form of Underwriting  Agreement is incorporated herein by reference to
          the Registration Statement on Form S-1 filed on July 21, 1999.
      2.1 Share Exchange  Agreement with Glyko Biomedical,  Ltd. is incorporated
          herein by reference to the Registration Statement on Form S-1 filed on
          May 4, 1999.
     3.1A Amended  and  Restated   Certificate  of   Incorporation  of  BioMarin
          Pharmaceutical  Inc.,  a Delaware  Corporation,  as filed on March 22,
          1999 is incorporated herein by reference to the Registration Statement
          on Form S-1 filed on May 4, 1999.

     3.1B(1) Form of  Amended  and  Restated  Certificate  of  Incorporation  of
          BioMarin  Pharmaceutical  Inc., a Delaware Corporation is incorporated
          herein by reference to the Registration Statement on Form S-1 filed on
          July 6, 1999.
     3.2  Amended  and  Restated  Bylaws  of  BioMarin  Pharmaceutical  Inc.,  a
          Delaware  corporation  is  incorporated  herein  by  reference  to the
          Registration Statement on Form S-1 filed on July 6, 1999.
     4.1  Form of Amended and Restated  Registration  Rights  Agreement,  by and
          among the  Company and the  investors  named  therein is  incorporated
          herein by reference to the Registration Statement on Form S-1 filed on
          May 4, 1999.
     5.1  Opinion of Wilson Sonsini Goodrich & Rosati is incorporated  herein by
          reference to the Registration  Statement on Form S-1 filed on July 21,
          1999.
    10.1  Form of  Indemnification  Agreement  for  directors  and  officers  is
          incorporated herein by reference to the Registration Statement on Form
          S-1 filed on May 4, 1999.
    10.2  1997 Stock  Plan,  as  amended  on  December  22,  1998,  and forms of
          agreements  thereunder  is  incorporated  herein by  reference  to the
          Registration Statement on Form S-1 filed on May 4, 1999.
    10.3  1998  Director  Option  Plan and  forms of  agreements  thereunder  is
          incorporated herein by reference to the Registration Statement on Form
          S-1 filed on May 4, 1999.
    10.4  1998 Employee Stock  Purchase Plan and forms of agreements  thereunder
          is incorporated  herein by reference to the Registration  Statement on
          Form S-1 filed on May 4, 1999.
    10.5  Amended and Restated  Founder's Stock Purchase Agreement with Dr. John
          C. Klock  dated as of October 1, 1997 with  exhibits  is  incorporated
          herein by reference to the Registration Statement on Form S-1 filed on
          May 4, 1999.
    10.6  Amended and Restated  Founder's Stock Purchase Agreement with Grant W.
          Denison, Jr. dated as of October 1, 1997 with exhibits is incorporated
          herein by reference to the Registration Statement on Form S-1 filed on
          May 4, 1999.
    10.7  Amended and  Restated  Founder's  Stock  Purchase  Agreement  with Dr.
          Christopher  M. Starr  dated as of October  1, 1997 with  exhibits  is
          incorporated herein by reference to the Registration Statement on Form
          S- 1 filed on May 4, 1999.
    10.8  Employment  Agreement  with Dr. John C. Klock dated June 26, 1997,  as
          amended  is  incorporated  herein  by  reference  to the  Registration
          Statement on Form S-1 filed on June 14, 1999.
    10.9  Employment  Agreement with Grant W. Denison,  Jr. dated June 26, 1997,
          as amended is  incorporated  herein by reference  to the  Registration
          Statement on Form S-1 filed on May 4, 1999.
    10.10 Employment  Agreement  with Dr.  Christopher  M. Starr  dated June 26,
          1997,  as  amended  is   incorporated   herein  by  reference  to  the
          Registration Statement on Form S-1 filed on May 4, 1999.
    10.11 Employment  Agreement with Raymond W. Anderson dated June 22, 1998, as
          amended  is  incorporated  herein  by  reference  to the  Registration
          Statement on Form S-1 filed on May 4, 1999.
    10.12 Employment  Agreement with Stuart J. Swiedler,  M.D., Ph.D., dated May
          29,  1998,  as  amended is  incorporated  herein by  reference  to the
          Registration Statement on Form S-1 filed on May 4, 1999.



                                       29







 Exhibit
 Number   Description of Document
- --------  -------------------------------

  10.13   Employment  Agreement with Emil Kakkis,  M.D.,  Ph.D.,  dated June 30,
          1998,  as  amended  is   incorporated   herein  by  reference  to  the
          Registration Statement on Form S-1 filed on May 4, 1999.
  10.14   Employment  Agreement between Brian K. Brandley,  Ph.D and Glyko, Inc.
          dated  February  22,  1998,  as  amended  is  incorporated  herein  by
          reference  to the  Registration  Statement on Form S-1 filed on May 4,
          1999.
  10.15   License Agreement with Glyko Biomedical, Ltd. dated June 26, 1997 with
          exhibits   attached  is  incorporated   herein  by  reference  to  the
          Registration Statement on Form S-1 filed on May 4 1999.
 10.16(2) Option  Agreement  with  W.R.  Grace & Co.  dated as of May 1, 1998 is
          incorporated herein by reference to the Registration Statement on Form
          S-1 filed on June 14, 1999.
 10.17(2) Grant Terms and  Conditions  Agreement with  Harbor-UCLA  Research and
          Education  Institute  dated April 1, 1997, as amended is  incorporated
          herein by reference to the Registration Statement on Form S-1 filed on
          June 14, 1999.
 10.18(2) License  Agreement  with Women's and  Children's  Hospital,  Adelaide,
          Australia dated August 14, 1998 is incorporated herein by reference to
          the Registration Statement on Form S-1 filed on July 21, 1999.
 10.19    Lease  Agreement  dated May 18, 1998 for 371 Bel Marin Keys Boulevard,
          as amended is  incorporated  herein by reference  to the  Registration
          Statement on Form S-1 filed on May 4, 1999.
 10.20    Standard  NNN  Lease  dated  June  25,  1998  for 46  Galli  Drive  is
          incorporated herein by reference to the Registration Statement on Form
          S-1 filed on May 4, 1999.
 10.21    Standard Industrial Commercial  Single-Tenant Lease dated May 29, 1998
          for 110 Digital Drive, as amended is incorporated  herein by reference
          to the Registration Statement on Form S-1 filed on May 4, 1999.
 10.22    Sublease   dated  June  24,  1998  for  1123  West  Carson  Street  is
          incorporated herein by reference to the Registration Statement on Form
          S-1 filed on May 4, 1999.
 10.23    Commercial Lease and Deposit Receipt with Glyko,  Inc. for 11 Pimentel
          Court and 13 Pimentel  Court,  dated December 23, 1996 is incorporated
          herein by reference to the Registration Statement on Form S-1 filed on
          May 4, 1999.
 10.24    Collaboration  Agreement with Genzyme  Corporation  dated September 4,
          1998 is incorporated herein by reference to the Registration Statement
          on Form S-1 filed on July 21, 1999.
 10.25    Purchase Agreement with Genzyme Corporation dated September 4, 1998 is
          incorporated herein by reference to the Registration Statement on Form
          S-1 filed on May 4, 1999.
 10.26    Subscription  Agreement  with  Genzyme  dated  September  4,  1998  is
          incorporated herein by reference to the Registration Statement on Form
          S-1 filed on May 4, 1999.
 10.27    Form of Convertible Note Purchase Agreement dated as of April 12, 1999
          with form of convertible  promissory  note is  incorporated  herein by
          reference  to the  Registration  Statement on Form S-1 filed on May 4,
          1999.
 10.28    Astro License  Agreement  dated  December 18, 1990 among Glyko,  Inc.,
          Astromed,  Ltd.,  and  Astroscan,   Ltd.  is  incorporated  herein  by
          reference to the Registration  Statement on Form S-1 filed on June 14,
          1999.
 10.29    Glycomed  License  Agreement  dated  December 18, 1990 between  Glyko,
          Inc., and Glycomed,  Inc. is  incorporated  herein by reference to the
          Registration Statement on Form S-1 filed on June 14, 1999.
 10.30    Operating Agreement with Genzyme Corporation is incorporated herein by
          reference to the  Registration  Statement on Form S-1 filed on July 6,
          1999.
 21.1     List of  Subsidiaries  is  incorporated  herein  by  reference  to the
          Registration Statement on Form S-1 filed on May 4, 1999.
 23.1     Consent of Independent  Public  Accountants is incorporated  herein by
          reference to the Registration  Statement on Form S-1 filed on July 21,
          1999.
 23.2     Consent of Counsel (included in Exhibit 5.1) is incorporated herein by
          reference to the Registration  Statement on Form S-1 filed on July 21,
          1999.
 24.1     Power  of  Attorney  is  incorporated   herein  by  reference  to  the
          Registration Statement on Form S-1 filed on May 4, 1999.
 27.1     Financial Data Schedule (available in EDGAR format only).

                                       30