UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

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

                                    FORM 10-Q
                QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934
                           ---------------------------


For the Quarter Ended September 30, 2001             Commission File No. 0-12957


                               [LOGO] ENZON, INC.
             (Exact name of registrant as specified in its charter)


                 Delaware                                        22-2372868
     (State or other jurisdiction of                           (IRS Employer
      incorporation or organization)                        Identification No.)


20 Kingsbridge Road, Piscataway, New Jersey                         08854
 (Address of principal executive offices)                        (Zip Code)


Registrant's telephone number, including area code: (732) 980-4500

Securities registered pursuant to Section 12(b) of the Act: None

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

                          Common Stock, $.01 par value
                                (Title of class)

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

     As of November 9, 2001,  there were 42,760,559  shares of Common Stock, par
value $.01 per share, outstanding.




PART I FINANCIAL INFORMATION

Item 1. Financial Statements


                          ENZON, INC. AND SUBSIDIARIES
                      CONSOLIDATED CONDENSED BALANCE SHEETS
                      September 30, 2001 and June 30, 2001
                                  (unaudited)




                                                                    September 30,       June 30, 2001
                                                                         2001                 *
                                                                    -------------       -------------
                                                                                  
ASSETS
Current assets:
  Cash and cash equivalents                                         $ 362,930,192       $ 310,223,837
  Short-term investments                                               31,269,586         129,520,083
  Accounts receivable                                                  12,415,265          11,087,748
  Inventories                                                           1,821,697           1,852,144
  Other current assets                                                  2,973,142           2,837,199
                                                                    -------------       -------------
Total current assets                                                  411,409,882         455,521,011
                                                                    -------------       -------------

Property and equipment                                                 14,207,631          13,181,671
  Less accumulated depreciation and amortization                        9,703,044           9,761,999
                                                                    -------------       -------------
                                                                        4,504,587           3,419,672
                                                                    -------------       -------------
Other assets:
  Investments                                                         128,007,388          76,675,557
  Debt issue costs, net                                                12,317,808          12,774,951
  Patents and other assets, net                                         1,186,401           1,284,626
                                                                    -------------       -------------
                                                                      141,511,597          90,735,134
                                                                    -------------       -------------
Total assets                                                        $ 557,426,066       $ 549,675,817
                                                                    =============       =============

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable                                                  $   3,605,769       $   4,670,259
  Accrued expenses                                                      3,984,778           4,740,081
  Accrued interest                                                      4,786,986                --
                                                                    -------------       -------------
     Total current liabilities                                         12,377,533           9,410,340
                                                                    -------------       -------------
Accrued rent                                                              574,819             581,438
Royalty advance-Aventis                                                   694,814             694,814
Notes payable                                                         400,000,000         400,000,000
                                                                    -------------       -------------
                                                                      401,269,633         401,276,252
                                                                    -------------       -------------
Stockholders' equity:
  Preferred stock-$.01 par value, authorized 3,000,000 shares;
    issued and outstanding 7,000 shares at September 30,
    2001 and June 30, 2001 (liquidation preference
    aggregating $336,000 at September 30, 2001 and
    $333,000 at June 30, 2001)                                                 70                  70
  Common stock-$.01 par value, authorized 60,000,000 shares;
    issued and outstanding 42,218,159 shares at September
    30, 2001 and 41,990,859 shares at June 30, 2001                       422,182             419,909
  Additional paid-in capital                                          258,984,251         257,682,479
  Accumulated other comprehensive income                                   63,608             884,935
  Deferred compensation                                                (1,432,433)         (1,509,171)
  Accumulated deficit                                                (114,258,778)       (118,488,997)
                                                                    -------------       -------------
Total stockholders' equity                                            143,778,900         138,989,225
                                                                    -------------       -------------
Total liabilities and stockholders' equity                          $ 557,426,066       $ 549,675,817
                                                                    =============       =============


* Condensed from audited financial statements.

The  accompanying  notes are an integral  part of these  unaudited  consolidated
condensed financial statements.


                                       2



                          ENZON, INC. AND SUBSIDIARIES
                 CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS
                 Three Months Ended September 30, 2001 and 2000
                                   (Unaudited)




                                                                  Three months ended
                                                           September 30,      September 30,
                                                               2001               2000
                                                           ------------       ------------
                                                                        
Revenues:
  Net Sales                                                $  5,106,490       $  4,615,102
  Royalties                                                   6,987,313            332,166
  Contract revenue                                               49,899            226,346
                                                           ------------       ------------
    Total revenues                                           12,143,702          5,173,614
                                                           ------------       ------------
Costs and expenses:
  Cost of sales                                               1,390,861          1,001,188
  Research and development expenses                           3,497,157          2,636,597
  Selling, general and administrative expenses                4,122,111          3,074,227
                                                           ------------       ------------
    Total costs and expenses:                                 9,010,129          6,712,012
                                                           ------------       ------------
      Operating Income (loss)                                 3,133,573         (1,538,398)
                                                           ------------       ------------
Other income (expense):
  Interest and dividend income                                6,178,299          2,109,213
  Interest expense                                           (4,994,129)              --
  Other                                                          (1,192)            11,891
                                                           ------------       ------------
                                                              1,182,978          2,121,104
                                                           ------------       ------------
  Income before taxes                                         4,316,551            582,706

  Tax provision                                                  86,331               --
                                                           ------------       ------------
  Net income                                               $  4,230,220       $    582,706
                                                           ============       ============
Basic earnings per common share                            $       0.10       $       0.01
                                                           ============       ============
Diluted earnings per common share                          $       0.10       $       0.01
                                                           ============       ============
Weighted average number of common shares
  outstanding - basic                                        42,122,284         41,101,289
                                                           ============       ============
Weighted average number of common shares and dilutive
  potential common shares outstanding                        43,922,829         43,658,659
                                                           ============       ============



The  accompanying  notes are an integral  part of these  unaudited  consolidated
condensed financial statements.


                                       3



                          ENZON, INC. AND SUBSIDIARIES
                 CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
                 Three Months Ended September 30, 2001 and 2000
                                   (Unaudited)




                                                                      Three Months Ended
                                                               September 30,      September 30,
                                                                   2001               2000
                                                              -------------       -------------
                                                                            
Cash flows from operating activities:
  Net income                                                  $   4,230,220       $     582,706
  Adjustment for depreciation and amortization                      659,959             130,659
  Non-cash expense for issuance of common stock,
    Stock options                                                    76,738                --
  Loss on retirement of assets                                        3,798                --
  Amortization of bond premium/discount                          (3,345,705)           (100,524)
  Decrease in accrued rent                                           (6,619)             (6,619)
  Changes in assets and liabilities                               1,900,118              41,985
                                                              -------------       -------------
    Net cash provided by operating activities                     3,518,509             648,207
                                                              -------------       -------------
Cash flows from investing activities:
  Capital expenditures                                           (1,256,041)           (127,234)
  Proceeds from sale of investments                             170,938,000              19,600
  Maturities of investments                                      87,060,000           5,500,000
  Purchase of Investments                                      (208,554,956)        (19,050,859)
  Decrease in investments                                              --             5,950,859
                                                              -------------       -------------
 Net cash (used in) provided by investing activities             48,187,003          (7,707,634)
                                                              -------------       -------------
Cash flows from financing activities:
  Proceeds from issuance of common stock                          1,000,843           2,379,407
                                                              -------------       -------------
    Net increase (decrease) in cash and cash equivalents         52,706,355          (4,680,020)

Cash and cash equivalents at beginning of period                310,223,837          31,935,410
                                                              -------------       -------------
Cash and cash equivalents at end of period                    $ 362,930,192       $  27,255,390
                                                              =============       =============



The  accompanying  notes are an integral  part of these  unaudited  consolidated
condensed financial statements.


                                       4



                          ENZON, INC. AND SUBSIDIARIES
              Notes To Consolidated Condensed Financial Statements
                                   (Unaudited)


(1)  Organization and Basis of Presentation

     The  unaudited   consolidated  condensed  financial  statements  have  been
prepared  from the books and  records of Enzon,  Inc.  and its  subsidiaries  in
accordance with generally accepted  accounting  principles for interim financial
information.  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
only of  normal  and  recurring  adjustments)  considered  necessary  for a fair
presentation have been included.  Interim results are not necessarily indicative
of the results that may be expected for the year.

(2)  Comprehensive Income

     The following table reconciles net income to comprehensive income:

                                                        Three months ended
                                                           September 30,
                                                       2001              2000
                                                   -----------       -----------
     Net income                                    $ 4,230,000       $   583,000
     Other comprehensive income (loss):
       Unrealized holding gain arising
         during the period                              64,000              --

     Less:  reclassification adjustment for
              net gain realized in net income          885,000              --
                                                   -----------       -----------
     Total other comprehensive income (loss)          (821,000)             --
                                                   -----------       -----------
     Total comprehensive income                    $ 3,409,000       $   583,000
                                                   ===========       ===========

(3)  Earnings (loss) Per Common Share

     Basic  earnings per share is computed by dividing the net income  available
to common  shareholders  adjusted  for  cumulative  undeclared  preferred  stock
dividends for the relevant  period,  by the weighted average number of shares of
Common  Stock  issued  and  outstanding  during the  periods.  For  purposes  of
calculating diluted earnings per share for the quarters ended September 30, 2001
and 2000, the denominator includes both the weighted average number of shares of
Common Stock  outstanding and the number of dilutive  Common Stock  equivalents.
The  number  of  dilutive  Common  Stock  equivalents  includes  the  effect  of
non-qualified  stock options  calculated  using the treasury  stock method,  the
number of shares issuable upon conversion of the outstanding  Series A Preferred
Stock and the unvested  shares of restricted  stock which have been issued.  The
number of shares  issuable upon  conversion of the  Company's  4.5%  Convertible
Subordinated  Notes due 2008 (the  "Notes") have not been included as the effect
of their inclusion would be antidilutive.  As of September 30, 2001, the Company
had  9,640,000   dilutive   potential  common  shares   outstanding  that  could
potentially dilute future earnings per share calculations.


                                       5



                          ENZON, INC. AND SUBSIDIARIES
              Notes To Consolidated Condensed Financial Statements
                                   (Unaudited)


     The following  table  reconciles  the basic and diluted  earnings per share
calculation:

                                                     Three months ended
                                                     September 30, 2001
                                                   2001             2000
                                               -----------      -----------
     Net income                                $ 4,230,000      $   583,000
     Less:  preferred stock dividends                4,000            4,000
                                               -----------      -----------
     Net income available to
       common stockholders                     $ 4,226,000      $   579,000
                                               -----------      -----------
     Weighted average number of
       common shares issued and
       outstanding - basic                      42,122,284       41,101,289
     Effect of dilutive common stock
         equivalents:
       Conversion of preferred stock                16,000           16,000
       Exercise of non-qualified
         stock options                           1,759,545        2,541,370
       Unvested restricted stock award              25,000             --
                                               -----------      -----------
                                                43,922,829       43,658,659
                                               ===========      ===========

(4)  Inventories

     The  composition  of inventories at September 30, 2001 and June 30, 2001 is
as follows:

                                            September 30,         June 30,
                                                2001                2001
                                             ----------          ----------
     Raw materials                           $  425,000          $  421,000
     Work in process                            637,000             737,000
     Finished goods                             760,000             694,000
                                             ----------          ----------
                                             $1,822,000           1,852,000
                                             ==========          ==========

(5)  Cash Flow Information

     The Company considers all highly liquid securities with original maturities
of three months or less to be cash equivalents. There were no cash payments made
for interest for the three months ended  September 30, 2001 or 2000.  There were
no income tax payments  made for the three months ended  September  30, 2001 and
2000.

(6)  Income taxes

     The Company expects to be profitable for the year ending June 30, 2002, and
accordingly  has recognized a tax provision for the three months ended September
30, 2001.  The tax provision  represents the Company's  anticipated  Alternative
Minimum Tax liability based on anticipated fiscal 2002 taxable income.


                                       6



                          ENZON, INC. AND SUBSIDIARIES
              Notes To Consolidated Condensed Financial Statements
                                   (Unaudited)


(7)  Business Segments

     A single  management  team  that  reports  to the Chief  Executive  Officer
comprehensively manages the Company's business operations.  The Company does not
operate separate lines of business or separate business entities with respect to
any of its approved  products or product  candidates.  In addition,  the Company
does not conduct any operations  outside of the United States.  The Company does
not prepare  discrete  financial  statements  with  respect to separate  product
areas. Accordingly,  the Company does not have separately reportable segments as
defined by Statement of Financial  Accounting  Standards  No. 131,  "Disclosures
about Segments of an Enterprise and Related Information."

(8)  Schering-Plough Agreement

     In  August  2001,  the  Company's   development   partner  for  PEG-INTRON,
Schering-Plough  Corporation,  received approval from the United States Food and
Drug  Administration  (FDA) for PEG-INTRON  for use in combination  therapy with
REBETOL(R)  capsules for the treatment of chronic  hepatitis C. In October 2001,
Schering-Plough  announced the U.S. launch of PEG-INTRON and REBETOL combination
therapy for the treatment of chronic hepatitis C. Under its licensing  agreement
with  Schering-Plough,  Enzon is entitled to  royalties  on  worldwide  sales of
PEG-INTRON. The royalties received on these sales are recognized when earned.


                                       7



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

Information contained herein contains "forward-looking  statements" which can be
identified  by the  use  of  forward-looking  terminology  such  as  "believes,"
"expects,"  "may," "will," "should," or "anticipates" or the negative thereof or
other  variations  thereon  or  comparable  terminology,  or by  discussions  of
strategy.  We  cannot  assure  you  that  the  future  results  covered  by  the
forward-looking  statements will be achieved. The matters set forth in the "Risk
Factors"  section and elsewhere in our Annual Report on Form 10-K for the fiscal
year ended June 30, 2001, which is incorporated herein by reference,  constitute
cautionary  statements  identifying  important  factors  with  respect  to  such
forward-looking  statements,  including  certain risks and  uncertainties,  that
could cause actual results to vary materially from the future results  indicated
in such  forward-looking  statements.  Other  factors  could also  cause  actual
results  to  vary  materially   from  the  future  results   indicated  in  such
forward-looking statements.

Results of Operations

Three months ended September 30, 2001 vs. Three months ended September 30, 2000

     Revenues.  Revenues for the three months ended September 30, 2001 increased
by 135% to  $12,144,000,  as compared to  $5,174,000  for the same period in the
prior year. The  components of revenues are sales of our products,  royalties we
earn on the sales of our  products  by  others,  and  contract  revenues.  Sales
increased by 11% to $5,107,000 for the three months ended September 30, 2001, as
compared to $4,615,000  for the same period in the prior year.  The increase was
primarily due to increased  ONCASPAR  sales.  The increase in ONCASPAR sales was
due to the lifting of all of the  distribution  restrictions  imposed by the FDA
that were in place during the prior year. These  distribution  restrictions were
related to a previously  disclosed  manufacturing  problem and resulted in prior
year sales being lower than in the current quarter. During October 2000, the FDA
gave final  approval to  manufacturing  changes which we had proposed to correct
these manufacturing problems and removed all previously imposed distribution and
labeling restrictions. This will allow for the resumption of normal distribution
and labeling of this product by our marketing partner,  Aventis Pharmaceuticals,
which is  expected  to take place in the first half of  calendar  year 2002.  We
expect lower  revenues  from ONCASPAR in future  quarters  when Aventis  resumes
distribution  of the  product  and our revenue  stream  reverts  back to a 27.5%
royalty rate on net sales. ADAGEN sales decreased by 12% over the prior year due
to the timing of shipments of the product.  Sales of ADAGEN for the three months
ended September 30, 2001 and 2000 were $2,923,000 and $3,319,000, respectively.

     Royalties for the quarter ended September 30, 2001, increased to $6,987,000
as compared to $332,000 in the prior year. The increase was primarily due to the
commencement  of sales of PEG-INTRON in the U.S. and increased  sales in Europe.
Schering-Plough,  our marketing partner of PEG-INTRON,  began selling PEG-INTRON
in the European Union in June 2000 and in the U.S. in February 2001.  PEG-INTRON
also received  marketing  approval for use in  combination  with REBETOL for the
treatment of hepatitis C in the European  Union in March 2001 and in the U.S. in
August 2001.  PEG-INTRON in combination with REBETOL was launched in the U.S. by
Schering-Plough in October 2001.

     Contract  revenue for the quarter ended September 30, 2001 decreased by 78%
to $50,000 as compared  to  $226,000 in the same period in the prior year.  This
decrease was related primarily to a $200,000 payment from one of our development
partners  which was earned in the quarter  ended  September  30,  2000.  No such
payment was received in the current quarter.

     During the three months ended  September  30, 2001, we had export sales and
royalties on export sales of  $4,916,000,  of which  $4,622,000  were in Europe.
Export sales and  royalties  recognized  on export sales for the prior year were
$1,622,000, of which $1,464,000 were in Europe.


                                       8



     Cost of Sales.  Cost of sales,  as a percentage of sales,  increased to 27%
for the three  months ended  September  30, 2001 as compared to 22% for the same
period in 2000.  This  increase  was due to lower cost of goods sold  during the
prior year's  quarter due to the reversal of a contingency  reserve for ONCASPAR
finished goods due to the previously disclosed manufacturing problems.

     Research and Development.  Research and development  expenses for the three
months ended  September  30, 2001  increased by 33% to $3,497,000 as compared to
$2,637,000  for the same  period  in 2000.  The  increase  was due to  increased
contracted  services  related to clinical  trials and  pre-clinical  studies for
products  under  development,   including   PROTHECAN   (PEG-camptothecin)   and
PEG-paclitaxel.  Research and development activities are expected to continue to
increase  significantly  as we  continue  the  advancement  of the  current  and
additional  Phase II clinical  trials for  PROTHECAN,  we  continue  our Phase I
clinical trials for  PEG-paclitaxel,  and we conduct  pre-clinical  and clinical
trials for additional compounds.

     Selling,  General  and  Administrative   Expenses.   Selling,  general  and
administrative expenses for the three months ended September 30, 2001, increased
by 34% to $4,122,000, as compared to $3,074,000 for the same period in 2000. The
increase was primarily due to costs related to the  identification and review of
potential strategic acquisitions of technologies, products and companies.

     Other  Income/Expense.  Other  income/expense  decreased to  $1,183,000  as
compared to $2,121,000 for the prior year. The decrease was  attributable  to an
increase in interest  expense due to the issuance of $400,000,000 of convertible
subordinated  notes during June 2001 as well as a decrease in interest  rates on
interest bearing investments. The notes bear interest at an annual rate of 4.5%.

     Provision  for Taxes.  The Company  expects to be  profitable  for the year
ending June 30, 2002,  and  accordingly  has  recognized a tax provision for the
three  months  ended  September  30,  2001.  The tax  provision  represents  the
Company's  anticipated  Alternative  Minimum Tax liability  based on anticipated
fiscal 2002 taxable income.

Liquidity and Capital Resources

     Total cash reserves,  which include cash,  cash  equivalents and marketable
securities,  were  $522,158,000  as  of  September  30,  2001,  as  compared  to
$516,379,000  as of June 30, 2001. We invest our excess cash primarily in United
States government-backed securities. The increase in total cash reserves was due
to cash provided by operations.

     As of September 30, 2001, the Company had  $400,000,000 of 4.5% convertible
subordinated  notes  outstanding.  The notes bear  interest at an annual rate of
4.5%. Interest is payable on January 1 and July 1 of each year beginning January
1,  2002.  Accrued  interest  on the notes was  approximately  $4,787,000  as of
September  30, 2001.  The holders may convert all or a portion of the notes into
common  stock at any time on or before July 1, 2008.  The notes are  convertible
into our common  stock at a  conversion  price of $70.98  per share,  subject to
adjustment in certain  events.  The notes are  subordinated  to all existing and
future senior  indebtedness.  On or after July 7, 2004, we may redeem any or all
of the notes at specified redemption prices, plus accrued and unpaid interest to
the day preceding  the  redemption  date.  The notes will mature on July 1, 2008
unless  earlier  converted,  redeemed at our option or redeemed at the option of
the noteholder upon a fundamental  change, as described in the indenture for the
notes.  Neither we nor any of our  subsidiaries  are  subject  to any  financial
covenants  under  the  indenture.  In  addition,  neither  we  nor  any  of  our
subsidiaries are restricted under the indenture from paying dividends, incurring
debt, or issuing or repurchasing our securities.

     To date,  our sources of cash have been the  proceeds  from the sale of our
stock through public offerings and private placements,  the issuance of the 4.5%
convertible  subordinated  notes,  sales of and  royalties  on sales of  ADAGEN,
ONCASPAR, and PEG-INTRON,  sales of our products for research


                                       9



purposes,  contract  research  and  development  fees,  technology  transfer and
license fees and royalty advances.

     Under our amended license agreement with Aventis,  we received a payment of
$3,500,000 in advance royalties in January 1995. Royalties due under the amended
license agreement will be offset against an original credit of $5,970,000, which
represents the royalty advance plus reimbursement of certain amounts due Aventis
under the original agreement and interest expense,  before cash payments will be
made under the agreement. The royalty advance is shown as a long-term liability.
The corresponding  current portion of the advance is included in accrued expense
on the consolidated  balance sheets. We will reduce the advance as royalties are
recognized  under the  agreement.  Through  September  30, 2001, an aggregate of
$4,307,000 in royalties  payable by Aventis has been offset against the original
credit.

     As of September 30, 2001,  1,043,000 shares of Series A preferred stock had
been converted into 3,325,000 shares of common stock.  Accrued  dividends on the
converted  Series A preferred  stock in the aggregate of $3,770,000 were settled
by the  issuance  of  235,000  shares  of  common  stock  and cash  payments  of
$1,947,000.  The shares of Series A preferred stock outstanding at September 30,
2001 are convertible into approximately 16,000 shares of common stock. Dividends
accrue on the remaining outstanding shares of Series A preferred stock at a rate
of $14,000 per year.  As of September  30,  2001,  there were accrued and unpaid
dividends  totaling  $161,000 on the 7,000  shares of Series A  preferred  stock
outstanding.  We have the option to pay these dividends in either cash or common
stock.

     Our current  sources of liquidity are cash,  cash  equivalents and interest
earned  on such  cash  reserves,  sales of and  royalties  on  sales of  ADAGEN,
ONCASPAR,  and PEG-INTRON,  and license fees.  Based upon our currently  planned
research and development activities and related costs and our current sources of
liquidity,  we  anticipate  our current cash reserves will be sufficient to meet
our  capital,  debt service and  operational  requirements  for the  foreseeable
future.

     We may seek  additional  financing,  such as through  future  offerings  of
equity or debt securities or agreements with  collaborators  with respect to the
development and  commercialization  of products,  to fund future  operations and
potential  acquisitions.  We cannot assure you, however, that we will be able to
obtain additional funds on acceptable terms, if at all.

Recently Issued Accounting Standards

     In July 2001, the FASB issued SFAS No. 141, Business Combination,  and SFAS
No. 142,  Goodwill  and Other  Intangible  Assets.  SFAS 141  requires  that all
business  combinations  be  accounted  for under a single  method - the purchase
method. Use of the pooling-of-interests  method no longer is permitted. SFAS 141
requires that the purchase  method be used for business  combinations  initiated
after June 30, 2001.  SFAS 142 requires  that goodwill no longer be amortized to
earnings, but instead be reviewed for impairment.  SFAS 142 has no impact on our
historical  financial  statements  as we do not have any goodwill or  intangible
assets, which resulted from business combinations.

     In  August  2001,  the FASB  issued  SFAS No.  143,  Accounting  for  Asset
Retirement  Obligations,  which addresses financial accounting and reporting for
obligations associated with the retirement of tangible long-lived assets and the
associated asset retirement costs. SFAS 143 requires an enterprise to record the
fair value of an asset  retirement  obligation  as a liability  in the period in
which it incurs a legal  obligation  associated  with the retirement of tangible
long-lived  assets.  Since the  requirement is to recognize the obligation  when
incurred,  approaches  that  have  been  used in the past to  accrue  the  asset
retirement obligation over the life of the asset are no longer acceptable.  SFAS
143 also requires the enterprise to record the contra to the initial  obligation
as an increase to the carrying amount of the related long-lived asset (i.e., the
associated asset retirement  costs) and to depreciate that cost over the life of
the asset.  The  liability is increased at the end of each period to reflect the
passage of time (i.e.,  accretion  expense) and changes in the estimated  future
cash flows  underlying  the  initial  fair value  measurement.  Enterprises  are


                                       10



required to adopt  Statement 143 for fiscal years beginning after June 15, 2002.
We are in the process of  evaluating  this SFAS and the effect that it will have
on our consolidated financial statements and current impairment policy.

Item 3a. Quantitative and Qualitative Disclosures About Market Risk

     The  following  discussion  about our  exposure to market risk of financial
instruments  contains  forward-looking  statements.  Actual  results  may differ
materially from those described.

     Our holdings of financial  instruments are comprised of debt securities and
time   deposits.   All   such   instruments   are   classified   as   securities
available-for-sale.   We  do  not  invest  in  portfolio  equity  securities  or
commodities or use financial derivatives for trading purposes. Our debt security
portfolio  represents  funds held  temporarily  pending use in our  business and
operations. We manage these funds accordingly. We seek reasonable assuredness of
the safety of principal and market  liquidity by investing in rated fixed income
securities while at the same time seeking to achieve a favorable rate of return.
Our market risk exposure consists principally of exposure to changes in interest
rates.  Our  holdings  are also  exposed  to the risks of  changes in the credit
quality of issuers.  We typically  invest the majority of our investments in the
shorter-end  of the  maturity  spectrum,  and at  September  30, 2001 all of our
holdings were in instruments maturing in 4 years or less.

     The table below presents the principal amounts and related weighted average
interest rates by year of maturity for our investment  portfolio as of September
30, 2001.



                           2002          2003          2004         2005         Total      Fair Value
                        ----------    ----------    ----------   ----------   -----------   -----------
                                                                          
Fixed Rate              31,206,000    11,751,000    94,279,000   21,936,000   159,172,000   159,236,000
Average Interest Rate         5.63%         3.31%         3.98%        3.96%         4.25%         --
Variable Rate                 --            --            --           --            --            --
Average Interest Rate         --            --            --           --            --            --
                        ----------    ----------    ----------   ----------   -----------   -----------
                        31,206,000    11,751,000    94,279,000   21,936,000   159,172,000   159,236,000
                        ==========    ==========    ==========   ==========   ===========   ===========


     Our  4.5%  convertible  subordinated  notes  in  the  principal  amount  of
$400,000,000 due July 1, 2008 have fixed interest rates. The fair value of fixed
interest rate convertible  notes is affected by changes in interest rates and by
changes in the price of our common stock.


                                       11



Item 6. Exhibits and Reports on Form 8-K

(a)  Exhibits (numbered in accordance with Item 601 of Regulation S-K).



                                                                                    Page Number
                                                                                         or
Exhibit                                                                             Incorporation
Number    Description                                                               By Reference
- ------    -----------                                                               ------------
                                                                                
  3(i)    Certificate of Incorporation as amended                                             ~~

  3(ii)   By laws, as amended                                                             *(4.2)

  3(iv)   Amendment to Certificate of Incorporation dated January 5, 1998                ##3(iv)

  4.1     Indenture dated as of June 26, 2001, between the Company and
          Wilmington Trust Company, as trustee, including the form of 4 1/2%
          Convertible Subordinated Note due 2008 attached as Exhibit A thereto         ++++(4.1)

  4.2     Registration Rights Agreement dated as of June 26, 2001, between the
          Company and the initial purchasers                                           ++++(4.2)

 10.1     Form of Change of Control Agreements dated as of January 20, 1995
          entered into with the Company's Executive Officers                           ###(10.2)

 10.2     Lease - 300-C Corporate Court, South Plainfield, New Jersey                  ***(10.3)

 10.3     Lease dated April 1, 1995 regarding 20 Kingsbridge
          Road, Piscataway, New Jersey                                                 ###(10.7)

 10.4     Lease 300A-B Corporate Court, South Plainfield, New Jersey                   ++(10.10)

 10.5     Form of Stock Purchase Agreement between the Company
          and the purchasers of the Series A Cumulative
          Convertible Preferred Stock                                                   +(10.11)

 10.6     Employment Agreement with Peter G. Tombros dated as of
          August 10, 2000                                                              //(10.15)

 10.7     Stock Purchase Agreement dated as of June 30, 1995                            ~(10.16)

 10.8     Independent Directors' Stock Plan                                           ~~~(10.24)

 10.9     Underwriting Agreement dated March 20, 2000 with Morgan
          Stanley & Co. Inc., CIBC World Markets Corp., and SG
          Cowen Securities Corporation                                                  /(10.29)

 10.10    Employment Agreement dated May 9, 2001, between the Company
          and Arthur J. Higgins                                                       ///(10.30)

 10.11    Amendment dated May 23, 2001, to Employment Agreement between
          the Company and Arthur J. Higgins dated May 9, 2001                         ///(10.31)

 10.12    Form of Restricted Stock Award Agreement between the Company and
          Arthur J. Higgins                                                            ////(4.3)

 10.13    Form of Employee Retention Agreement dated as of August 3, 2001
          between the Company and certain key employees                                      +++


*    Previously filed as an exhibit to the Company's  Registration  Statement on
     Form S-2 (File No. 33-34874) and incorporated herein by reference thereto.

***  Previously filed as an exhibit to the Company's  Registration  Statement on
     Form S-18  (File  No.  2-88240-NY)  and  incorporated  herein by  reference
     thereto.

+    Previously filed as an exhibit to the Company's  Registration  Statement on
     Form S-1 (File No.  33-39391)  filed with the Commission  and  incorporated
     herein by reference thereto.

++   Previously  filed as an exhibit to the Company's Annual Report on Form 10-K
     for the  fiscal  year  ended  June 30,  1993  and  incorporated  herein  by
     reference thereto.


                                       12



+++  Previously  filed as an exhibit to the Company's Annual Report on Form 10-K
     for the  fiscal  year  ended  June 30,  2001  and  incorporated  herein  by
     reference thereto.

++++ Previously filed as an exhibit to the Company's  Registration  Statement on
     Form S-3 (File No.  333-67509)  filed with the Commission and  incorporated
     herein by reference thereto.

##   Previously  filed as an exhibit to the Company's  Quarterly  Report on Form
     10-Q for the quarter  ended  December 31, 1997 and  incorporated  herein by
     reference thereto.

###  Previously  filed as an exhibit to the Company's  Quarterly  Report on Form
     10-Q for the  quarter  ended  March  31,  1995 and  incorporated  herein by
     reference thereto.

~    Previously  filed as an exhibit to the Company's  Quarterly  Report on Form
     10-Q for the quarter  ended  December 31, 1995 and  incorporated  herein by
     reference thereto.

~~   Previously  filed as an exhibit to the Company's  Quarterly  Report on Form
     10-Q for the  quarter  ended  March  31,  1996 and  incorporated  herein by
     reference thereto.

~~~  Previously  filed as an exhibit to the Company's  Quarterly  Report on Form
     10-Q for the quarter  ended  December 31, 1996 and  incorporated  herein by
     reference thereto.

/    Previously filed as an exhibit to the Company's  Registration  Statement on
     Form S-3 (File No.  333-30818)  filed with the Commission and  incorporated
     herein by reference thereto.

//   Previously  filed as an exhibit to the Company's Annual Report on Form 10-K
     for the year  ended  June 30,  2000 and  incorporated  herein by  reference
     thereto.

///  Previously filed as an exhibit to the Company's  Current Report on Form 8-K
     filed  with the  Commission  on June 13,  2001 and  incorporated  herein by
     reference thereto.

//// Previously filed as an exhibit to the Company's  Registration  Statement on
     Form S-8 (File No.  333-64110)  filed with the Commission and  incorporated
     herein by reference thereto.


                                       13



(b)  Reports on Form 8-K.

     On July 17, 2001, we filed with the Commission a Current Report on Form 8-K
dated July 3, 2001  reporting  that  Schering-Plough  submitted  a  supplemental
Biologics  License  Application  to  the  FDA  seeking  marketing  approval  for
PEG-INTRON(TM)  (peginterferon alfa-2b) Redipen(TM) Single-dose Delivery System.
In addition,  we reported  that  Schering-Plough  had reported  that the FDA had
issued  inspection  reports (Form FDA-483s) which cited some continuing and some
additional  deficiencies  concerning  compliance with current Good Manufacturing
Practices,  which related to the manufacture of ribavirin, which is manufactured
at Schering-Plough's facilities.

     On July 27, 2001, we filed with the Commission a Current Report on Form 8-K
dated July 24, 2001  reporting the  initiation  of patient  dosing in a Phase II
clinical  trial for  PROTHECAN(R)  (PEG-camptothecin)  designed to evaluate  the
anti-tumor activity of PROTHECAN.  In addition, we reported that Schering-Plough
had been granted marketing  approval from the FDA for REBETOL  (ribavirin,  USP)
Capsules  as a  separately  marketed  product for use only in  combination  with
INTRON(R) A  (interferon  alfa-2b,  recombinant)  Injection for the treatment of
chronic  hepatitis C in  patients  with  compensated  liver  disease  previously
untreated with alpha interferon or who have relapsed  following alpha interferon
therapy.

     On August 9, 2001,  we filed with the  Commission a Current  Report on Form
8-K dated August 8, 2001 reporting that  Schering-Plough  received approval from
the FDA for PEG-INTRON(TM)  (peginterferon alfa-2b) Powder for Injection for use
in  combination  therapy  with  REBETOL(R)  (ribavirin,  USP)  Capsules  for the
treatment of chronic  hepatitis C in patients with compensated liver disease who
have not been previously treated with interferon alpha and are at least 18 years
of age.

     On August 13, 2001, we filed with the  Commission a Current  Report on Form
8-K dated August 13, 2001 reporting that Schering-Plough  entered into a license
agreement with  F.Hoffmann-La  Roche Ltd and Hoffman-La  Roche Inc. that settles
all patent  disputes  relative to the two  companies'  respective  peginterferon
products and provides for each company to manufacture  and market  worldwide its
peginterferon  products free from liability for  infringement  under the other's
existing patent rights.

     On August 21, 2001, we filed with the  Commission a Current  Report on Form
8-K dated August 21, 2001 reporting our financial results for the fourth quarter
of fiscal year 2001.


                                       14



                                   SIGNATURES

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


                                        ENZON, INC.
                                        (Registrant)


Date: November 13, 2001                 By:  /s/Arthur J. Higgins
                                             ----------------------------------
                                             Arthur J. Higgins
                                             President and Chief Executive
                                             Officer


                                        By:  /s/Kenneth J. Zuerblis
                                             ----------------------------------
                                             Kenneth J. Zuerblis
                                             Vice President, Finance,
                                             Chief Financial Officer
                                             (Principal Financial
                                             and Accounting Officer) and
                                             Corporate Secretary


                                       15