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 March 31, 2001                 Commission File No. 0-12957


                              [GRAPHIC] 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)

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


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 [_]


The number of shares of common stock,  $.01 par value,  outstanding as of May 7,
2001 was 41,889,169 shares.




PART I FINANCIAL INFORMATION
Item 1. Financial Statements

                           ENZON, INC AND SUBSIDIARIES
                      CONSOLIDATED CONDENSED BALANCE SHEETS
                        March 31, 2001 and June 30, 2000



                                                                         March 31,            June 30,
ASSETS                                                                      2001                2000
                                                                       ---------------------------------
                                                                        (unaudited)                  *
                                                                                      
Current assets:
  Cash and cash equivalents                                              $25,796,640         $31,935,410
  Short-term investments                                                  55,389,813          16,986,278
  Accounts receivable                                                      7,234,469           5,442,455
  Inventories                                                              1,482,303             946,717
  Other current assets                                                     3,306,915           2,269,884
                                                                       -------------       -------------
     Total current assets                                                 93,210,140          57,580,744
                                                                       -------------       -------------
Property and equipment                                                    12,747,797          12,439,729
  Less accumulated depreciation and amortization                          10,412,249          10,650,859
                                                                       -------------       -------------
                                                                           2,335,548           1,788,870
                                                                       -------------       -------------
Other assets:
  Investments                                                             46,519,791          69,557,482
  Other assets, net                                                          832,563             426,731
  Patents, net                                                               791,962             898,423
                                                                       -------------       -------------
                                                                          48,144,316          70,882,636
                                                                       -------------       -------------
Total assets                                                            $143,690,004        $130,252,250
                                                                       =============       =============


LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
  Accounts payable                                                        $3,476,118          $2,465,360
  Accrued expenses                                                         3,795,276           5,706,811
                                                                       -------------       -------------
     Total current liabilities                                             7,271,394           8,172,171
                                                                       -------------       -------------
  Accrued rent                                                               588,057             607,914
  Royalty advance - Aventis                                                  694,815             510,001
                                                                       -------------       -------------
                                                                           1,282,872           1,117,915
                                                                       -------------       -------------
Commitments and contingencies
Stockholders' equity:
  Preferred stock-$.01 par value, authorized 3,000,000 shares;
      issued and outstanding 7,000 shares at March 31, 2001
      and June 30, 2000 (liquidation preference aggregating
      $330,000 at March 31, 2001 and $319,000 at June 30, 2000)                   70                  70
  Common stock-$.01 par value, authorized 60,000,000 shares;
      issued and outstanding 41,889,169 shares at March
      31, 2001 and 40,838,115 shares at June 30, 2000                        418,892             408,381
  Additional paid-in capital                                             255,325,247         250,567,774
  Accumulated other comprehensive income                                   1,188,835                  --
  Accumulated deficit                                                   (121,797,306)       (130,014,061)
                                                                       -------------       -------------
Total stockholders' equity                                               135,135,738         120,962,164
                                                                       -------------       -------------
Total liabilities and stockholders' equity                              $143,690,004        $130,252,250
                                                                       =============       =============


*Condensed from audited financial statements.

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


                                      -2-


                                   ENZON, INC.
                 CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS
           Three Months and Nine Months Ended March 31, 2001 and 2000
                                   (Unaudited)



                                                                       Three months ended                  Nine months ended
                                                                   March 31,         March 31,          March 31,        March 31,
                                                                      2001             2000               2001             2000
                                                                  -----------------------------------------------------------------
                                                                                                            
Revenues:
  Net sales and royalties                                          $7,867,260        $4,708,391       $18,816,729       $11,325,294
  Contract revenue                                                  2,064,494         1,014,726         2,307,784         1,076,708
                                                                  -----------      ------------       -----------      ------------
     Total revenues                                                 9,931,754         5,723,117        21,124,513        12,402,002
                                                                  -----------      ------------       -----------      ------------
Costs and expenses:
  Cost of sales                                                       988,380         1,041,749         2,860,592         3,013,231
  Research and development expenses                                 3,684,268         1,921,442         8,829,537         5,511,694
  Selling, general and administrative expenses                      2,640,889         4,928,038         8,228,926        10,064,447
                                                                  -----------      ------------       -----------      ------------
     Total costs and expenses                                       7,313,537         7,891,229        19,919,055        18,589,372
                                                                  -----------      ------------       -----------      ------------
       Operating income (loss)                                      2,618,217        (2,168,112)        1,205,458        (6,187,370)
                                                                  -----------      ------------       -----------      ------------
Other income (expense)
  Interest and dividend income                                      2,255,642           483,335         6,420,343         1,082,557
  Interest expense                                                         --              (167)               --            (4,051)
  Other                                                                 1,483                --            13,352           (36,274)
                                                                  -----------      ------------       -----------      ------------
                                                                    2,257,125           483,168         6,433,695         1,042,232
                                                                  -----------      ------------       -----------      ------------

     Net income (loss) before taxes                                 4,875,342        (1,684,944)        7,639,153        (5,145,138)

       Income tax benefit                                             632,879                --           577,603                --
                                                                  -----------      ------------       -----------      ------------
     Net income (loss) after taxes                                 $5,508,221       ($1,684,944)       $8,216,756       ($5,145,138)
                                                                  ===========      ============       ===========      ============
Basic earnings (loss) per common share                                  $0.13            ($0.04)            $0.20            ($0.14)
                                                                  ===========      ============       ===========      ============
Weighted average basic number of common shares
 outstanding                                                       41,802,586        38,303,494        41,490,866        37,190,902
                                                                  ===========      ============       ===========      ============

Diluted earnings (loss) per common share                                $0.13            ($0.04)            $0.19            ($0.14)
                                                                  ===========      ============       ===========      ============

Weighted average diluted number of common shares                   43,718,044        38,303,494        43,509,342        37,190,902
 outstanding                                                      ============     ============       ===========      ============



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
                    Nine Months Ended March 31, 2001 and 2000
                                   (Unaudited)



                                                                                          Nine Months Ended
                                                                                     March 31,           March 31,
                                                                                        2001               2000
                                                                                   --------------------------------
                                                                                                 
Cash flows from operating activities:
  Net income (loss)                                                                  $8,216,756         ($5,145,138)
  Adjustment for depreciation and amortization                                          414,487             365,142
  Loss on retirement of equipment                                                            22              36,274
  Amortization of bond premium/discount                                                (725,311)                 --
  Non-cash expense for issuance of common stock and stock options                            --             415,131
  Decrease in accrued rent                                                              (19,857)            (19,857)
  Increase in royalty advance - Aventis                                                   3,134              15,702
  Changes in operating assets and liabilities                                       (10,439,859)          6,001,497
                                                                                   ------------       -------------

     Net cash provided by (used in) provided by operating activities                 (2,550,628)          1,668,751
                                                                                   ------------       -------------

Cash flows from investing activities:
  Capital expenditures                                                                 (854,726)           (650,253)
  Proceeds from sale of investments                                                      19,600                  --
  Purchase of investments                                                           (41,009,000)                 --
  Maturities of investments                                                          33,488,000                  --
                                                                                   ------------       -------------

     Net cash used in investing activities                                           (8,356,126)           (650,253)
                                                                                   ------------       -------------

Cash flows from financing activities:
   Proceeds from issuance of common stock, net                                        4,767,984         102,405,479

   Dividends paid on preferred stock                                                         --          (1,542,404)
                                                                                   ------------       -------------
      Net cash provided by financing activities                                       4,767,984         100,863,075
                                                                                   ------------       -------------
      Net (decrease) increase in cash and cash equivalents                           (6,138,770)        101,881,573
                                                                                   ------------       -------------
Cash and cash equivalents at beginning of period                                     31,935,410          24,673,636
                                                                                   ------------       -------------
Cash and cash equivalents at end of period                                          $25,796,640        $126,555,209
                                                                                   ============       =============


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  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
annual  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.

     In June 1998, the Financial Accounting Standards Board issued Statement No.
133 "Accounting for Derivative  Instruments and Hedging Activities" ("FAS 133").
In  accordance  with the  statement,  the Company  adopted FAS 133 as of July 1,
2000.  The Company has reviewed FAS 133 and its  operations  relative to FAS 133
and concluded  that it does not use  derivative  instruments.  Accordingly,  the
adoption of FAS 133 did not have an effect on the results of  operations  or the
financial position of the Company.

     In April 2000, the Financial  Accounting Standards Board Interpretation No.
44,  "Accounting  for  Certain  Transactions   Involving  Stock  Compensation-An
Interpretation  of APB Opinion No. 25" ("FIN 44") was issued.  FIN 44  clarifies
the  application of APB No. 25 for certain  issues.  Among other issues,  FIN 44
clarifies  the  definition  of employee for purposes of applying APB No. 25, the
criteria for determining  whether a plan qualifies as a  non-compensatory  plan,
the accounting consequences of various modifications to the term of a previously
fixed  stock  option or  award,  and the  accounting  for an  exchange  of stock
compensation awards in a business  combination.  FIN 44 became effective July 1,
2000, but certain conclusions in this interpretation  cover specific events that
occur after either December 15, 1998 or January 12, 2000. The adoption of FIN 44
did not have a  significant  effect on our  financial  position  or  results  of
operations.

     Contract   revenue  is  recorded  as  the  earnings  process  is  complete.
Non-refundable  milestone  payments that  represent the completion of a separate
earnings process are recognized as revenue when earned.

     In December  1999,  the  Securities  and Exchange  Commission  issued Staff
Accounting  Bulletin  No. 101 ("SAB  101"),  "Revenue  Recognition  in Financial
Statements." SAB 101 provides guidance on applying generally accepted accounting
principles to revenue  recognition issues in financial  statements.  The Company
will adopt SAB 101 in the fourth quarter of fiscal 2001 and does not expect this
SAB to  have a  material  effect  on the  Company's  results  of  operations  or
financial position.








                                      -5-





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


(2)  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 for
interest during the nine months ended March 31, 2001. Cash payments for interest
were  approximately  $4,000 for the nine months ended March 31, 2000. There were
no income tax payments made for the nine months ended March 31, 2001 and 2000.

     During the quarter ended March 31, 2001, the Company changed its policy for
investment   securities   from   held-to-maturity   to  "available   for  sale".
Accordingly,  the Company  recognized an unrealized gain on these investments of
approximately  $1,189,000,  which is included as a  component  of  stockholders'
equity.

     There  were no  conversions  of Series A  Preferred  Stock  during the nine
months ended March 31, 2001. During the nine months ended March 31, 2000, 80,000
shares of Series A Cumulative  Convertible  Preferred Stock ("Series A Preferred
Stock") were converted to 181,818 shares of Common Stock.  Accrued  dividends of
$1,542,000 on the Series A Preferred  Stock that was  converted  during the nine
months ended March 31, 2000 were settled by a cash payment.


(3)  Comprehensive Income

The following table reconciles net income (loss) to comprehensive income (loss):



                                                 Three Months ended                         Nine Months ended
                                             March 31,          March 31,            March 31,          March 31,
                                               2001               2000                  2001              2000
                                            ------------------------------          ------------------------------
                                                                                           
Net Income (Loss)                           $5,508,000         ($1,685,000)         $8,217,000         ($5,145,000)
Unrealized Gain on Securities                1,189,000                  --           1,189,000                  --
                                            ----------         -----------          ----------         -----------

Total Comprehensive Income (Loss)           $6,697,000         ($1,685,000)         $9,406,000         ($5,145,000)
                                            ==========         ===========          ==========         ===========




 (4)  Earnings (loss) Per Common Share

     Basic  earnings  (loss) per share is computed  by  dividing  the net income
(loss)  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 three and nine months
ended March 31, 2001 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. For
the three and nine months ended March 31, 2000,  the exercise or  conversion  of
all dilutive potential common shares is not included for purposes of the diluted
loss  per  share   calculation  as  the  effect  of  their  inclusion  would  be
antidilutive  due to the net loss  recorded for those  periods.  As of March 31,
2001, the Company had 4,308,000  dilutive  potential  common shares  outstanding
that could  potentially  dilute  future  earnings  per share  calculations.  The
following  table  reconciles  the basic and  diluted  earnings  (loss) per share
calculation:




                                                                  Three months ended                       Nine months ended
                                                              March 31,         March 31,             March 31,          March 31
                                                                2001               2000                 2001               2000
                                                            -------------------------------         -------------------------------
                                                                                                           
Net income (loss)                                            $5,508,000         ($1,685,000)         $8,217,000         ($5,145,000)
Less:  Preferred stock dividends                                  4,000              14,000              11,000             108,000
                                                            -----------        ------------         -----------        ------------

Net income (loss) available to
   common stockholders                                       $5,504,000         ($1,699,000)         $8,206,000         ($5,253,000)
                                                            ===========        ============         ===========        ============

Weighted average number of
   common shares issued and
   outstanding - basic                                       41,803,000          38,303,000          41,491,000          37,191,000
Effect of dilutive common stock
   equivalents:
       Conversion of preferred stock                             16,000                  --              16,000                  --
       Exercise of non-qualified
       stock options                                          1,899,000                  --           2,002,000                  --
                                                            -----------        ------------         -----------        ------------
                                                             43,718,000          38,303,000          43,509,000          37,191,000
                                                            ===========        ============         ===========        ============



                                      -6-



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


(5)  Inventories

     The  composition  of  inventories at March 31, 2001 and June 30, 2000 is as
follows:

                                                   March 31,            June 30,
                                                     2001                 2000
                                                     ----                 ----

Raw Materials                                      $  536,000           $283,000
Work in process                                       809,000            504,000
Finished goods                                        137,000            160,000
                                                   ----------           --------
                                                   $1,482,000           $947,000
                                                   ==========           ========


(6)  Non-Qualified Stock Option Plan

     During the nine  months  ended  March 31,  2001,  we issued  745,000  stock
options at an average exercise price of $49.66 per share under our Non-Qualified
Stock Option Plan,  as amended,  of which  300,000 were granted to the Company's
three executive  officers and 60,000 were granted to  non-employee  directors of
the Company. None of the options granted during the period are exercisable as of
March 31, 2001.  All options were granted with  exercise  prices that equaled or
exceeded the fair market value of the underlying stock on the date of grant.

(7)  Income Taxes

     The Company expects to be profitable for the year ending June 30, 2001, and
accordingly  has  recognized a tax provision for the three and nine months ended
March  31,  2001.  The  tax  provision  represents  the  Company's   anticipated
Alternative  Minimum Tax liability based on the fiscal 2001 taxable income.  The
tax  provision  was  offset by a sale of a portion of the  Company's  New Jersey
state net operating  losses.  During March 2001, the Company sold  approximately
$833,000 of its state net  operating  loss carry  forwards and  recognized a tax
benefit of $728,000 from this sale.


                                      -7-



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


(8)  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 our approved products or product  candidates.  In addition,  there are no
operations conducted outside of the United States. Discrete financial statements
are not prepared with respect to separate product areas. Accordingly,  we do not
have  separately  reportable  segments  as defined  by  Statement  of  Financial
Accounting  Standards No. 131,  "Disclosures about Segments of an Enterprise and
Related Information".

(9)  Schering-Plough Agreement

     During the quarter  ended March 31, 2001,  the final  milestone  payment of
$2,000,000   was  received   under  the  Company's   licensing   agreement  with
Schering-Plough  related to the January 2001 U.S.  Food and Drug  Administration
(FDA) approval of PEG-INTRON(TM),  as once-weekly  monotherapy for the treatment
of hepatitis C. Under the Company's  licensing  agreement with  Schering-Plough,
the Company is entitled  to  royalties  on  worldwide  sales of  PEG-INTRON(TM).
During the quarter ended March 31, 2000, a $1,000,000 milestone payment was made
by Schering-Plough as a result of the FDA's acceptance of Schering-Plough's U.S.
marketing  application  for the use of  PEG-INTRON  in the  treatment of chronic
hepatitis C. These  non-refundable  milestone payments were recorded as contract
revenue in the quarter  received as the earnings  process was complete  when the
payments were received.

     In  March  2001,  PEG-INTRON  and  REBETOL(R)  (ribavirin,   USP)  received
marketing  authorization  from the European Union's (EU) European Agency for the
Evaluation of Medicinal Products (EMEA) as combination therapy for the treatment
of  hepatitis  C. In February  2001,  Schering-Plough  submitted a  supplemental
Biologics License  Application  (sBLA) to the FDA seeking similar U.S. marketing
approval of PEG-INTRON and REBETOL as  combination  therapy for the treatment of
adult patients with hepatitis C. This  application has received  priority review
status from the FDA.


                                      -8-



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.  No  assurance  can be given  that the future  results  covered by the
forward-looking  statements will be achieved. The matters set forth in the "Risk
Factors"  section of the  Company's  Annual Report on Form 10-K/A for the fiscal
year ended June 30, 2000, 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 March 31, 2001 vs. Three months ended March 31, 2000

Revenues. Revenues for the three months ended March 31, 2001 were $9,932,000, as
compared to  $5,723,000  for the three  months  ended March 31,  2000.  Revenues
consist  of our  sales  of  products  and  royalties  we earn on the sale of our
products by others, and contract revenues.  Sales and royalties increased by 67%
to  $7,867,000  for the three  months  ended  March 31,  2001,  as  compared  to
$4,708,000  for the three months  ended March 31, 2000.  The increase was due to
the commencement of royalties on sales of  PEG-INTRON(TM) in the U.S. and Europe
and  increased  ONCASPAR  sales.  Schering-Plough,  our  marketing  partner  for
PEG-INTRON,  began selling  PEG-INTRON in the European Union in June 2000 and in
the U.S. in February 2001. PEG-INTRON received marketing approval as once-weekly
monotherapy  for the treatment of chronic  hepatitis C in the European  Union in
May 2000 and in the U.S. in January 2001. In March 2001, the European Union also
approved PEG-INTRON for use in combination with REBETOL(R)  (Ribavrin,  USP) for
the treatment of hepatitis C.

     The increase in ONCASPAR  sales was due to the lifting of FDA  distribution
and  labeling  restrictions,  which were in place  during the prior year.  These
restrictions were related to a previously  disclosed  manufacturing  problem and
resulted in the prior year's sales being lower than sales in the current period.
During the quarter  ended  December  31,  2000,  the FDA gave final  approval to
manufacturing changes which we made to correct these manufacturing problems, and
all previously  imposed  restrictions have been lifted.  This will allow for the
resumption of normal  distribution and labeling of this product by our marketing
partner, Aventis Pharmaceuticals  (formerly Rhone-Poulenc Rorer Pharmaceuticals,
Inc.),  which is expected to take place during the second half of calendar 2001.
We expect to receive lower revenues from ONCASPAR sales 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.  Net sales of ADAGEN were  $3,307,000  for
the three months ended March 31, 2001 and  $3,277,000 for the three months ended
March 31, 2000.

     We expect sales of ADAGEN to increase at rates comparable to those achieved
during  the last  two  years as  additional  patients  are  treated.  We  expect
royalties  on  PEG-INTRON  to  increase  in  future   quarters  with   increased
availability of PEG-INTRON as combination  therapy with REBETOL for hepatitis C.
Schering-Plough  is also conducting  clinical trials for additional  indications
for  PEG-INTRON.  We cannot assure that any  particular  sales levels of ADAGEN,
ONCASPAR or PEG-INTRON will be achieved or maintained.

     We had export sales and royalties  recognized on export sales of $2,979,000
for the three  months ended March 31, 2001 and  $1,012,000  for the three months
ended March 31, 2000. Of these amounts, sales in Europe and royalties recognized
on sales in Europe,  were  $2,769,000  for the three months ended March 31, 2001
and $854,000 for the three months ended March 31, 2000.

     Contract  revenues  for the  quarter  ended  March 31,  2001  increased  by
$1,050,000, as compared to the prior year. The increase in contract revenues was
due  to  a   $2,000,000   milestone   payment  from  our   development   partner
Schering-Plough,  which  was  earned  as a  result  of  the  FDA's  approval  of
PEG-INTRON  in  January  2001.  During  the  same  period  in the  prior  year a
$1,000,000  milestone payment was recognized as a result of the FDA's acceptance
in January 2000 of Schering-Plough's  U.S. marketing  application for the use of
PEG-INTRON in the treatment of chronic hepatitis C.


                                      -9-



Cost of  Sales.  Cost of sales,  as a  percentage  of net  sales and  royalties,
improved to 13% for the three months  ended March 31,  2001,  as compared to 22%
for the same period in the prior year. The  improvement was primarily due to the
royalties recognized on Schering-Plough's  sales of PEG-INTRON.  Schering-Plough
bears all manufacturing costs related to PEG-INTRON.

Research  and  Development.  Research  and  development  expenses  increased  by
$1,763,000  to  $3,684,000  for the  three  months  ended  March  31,  2001 from
$1,921,000  for the same period last year.  The  increase  was due to  increased
payroll  and  related  expenses  due to  increases  in  research  personnel  and
increased   contracted   services   related  to  Phase  I  clinical  trials  and
pre-clinical  studies for products  under  development,  including  PROTHECAN(R)
(PEG-camptothecin)  and PEG-paclitaxel.  Research and development activities are
expected to continue to increase  significantly  as we move PROTHECAN into Phase
II clinical  trials,  we begin Phase I clinical trials for  PEG-paclitaxel,  and
additional compounds enter clinical trials.

Selling,  General  and  Administrative.   Selling,  general  and  administrative
expenses for the three months ended March 31, 2001  decreased by  $2,287,000  to
$2,641,000, as compared to $4,928,000 in 2000. The decrease was primarily due to
the recording of a net charge of $2,579,000 during the prior year, which was the
result of a binding  arbitration  award related to a lawsuit brought by a former
financial  advisor.  The decrease was partially  offset by increased  legal fees
associated with patent filings and litigation costs.

Other  income/expense.  Other  income/expense  was  $2,257,000,  as  compared to
$483,000  for  the  same  period  in the  prior  year.  The  increase  in  other
income/expense  is attributable to an increase in interest income as a result of
an increase in interest bearing investments.

Provision  for taxes.  We expect to be  profitable  for the year ending June 30,
2001, and  accordingly  we have  recognized a tax provision for the three months
ended March 31, 2001. The tax provision  represents our anticipated  Alternative
Minimum Tax liability based on the fiscal 2001 taxable income. The tax provision
was offset by the sale of a portion of our net operating losses for the state of
New Jersey.  During March 2001, we sold approximately  $833,000 of our state net
operating loss carry forwards and recognized a tax benefit of $728,000 from this
sale.

Nine months ended March 31, 2001 vs. Nine months ended March 31, 2000

Revenues.  Revenues  for the nine  months  ended  March 31,  2001  increased  by
$8,723,000 to $21,125,000  as compared to  $12,402,000  for the same period last
year.  Revenues  consist of sales of our products  and  royalties on the sale of
these products by others, and contract revenues.  Sales and royalties  increased
by 66% to  $18,817,000  for the nine months ended March 31, 2001, as compared to
$11,325,000  for the prior year.  The  increase was due to the  commencement  of
royalties on sales of PEG-INTRON  in the U.S. and Europe and increased  ONCASPAR
sales.  Schering-Plough,  our marketing  partner for  PEG-INTRON,  began selling
PEG-INTRON in the European  Union in June 2000 and in the U.S. in February 2001.
The increase in ONCASPAR  sales was due to the lifting of FDA  distribution  and
labeling restrictions which were in place during the prior year.

     Net sales of ADAGEN,  which we market,  were $9,796,000 for the nine months
ended March 31, 2001 and $9,319,000 for the nine months ended March 31, 2000.

     We had export sales and royalties  recognized on export sales of $6,669,000
for the nine  months  ended March 31,  2001 and  $3,018,000  for the nine months
ended March 31, 2000. Of these amounts, sales in Europe and royalties recognized
on sales in Europe, were $6,148,000 for the nine months ended March 31, 2001 and
$2,602,000 for the nine months ended March 31, 2000.

     Contract revenues increased by $1,231,000 to $2,308,000 for the nine months
ended March 31, 2001, as compared to $1,077,000 for the prior year's period. The
increase in contract revenues was due to a $2,000,000 milestone payment from our
development partner  Schering-Plough,  which was earned as a result of the FDA's
approval of PEG-INTRON in January 2001. During the same period in the prior year
a $1,000,000 milestone


                                      -10-



payment was  recognized  as a result of the FDA's  acceptance in January 2000 of
Schering-Plough's  U.S.  marketing  application for the use of PEG-INTRON in the
treatment of chronic hepatitis C.

Cost of  Sales.  Cost of sales,  as a  percentage  of net  sales and  royalties,
improved to 15% for the nine months ended March 31, 2001, as compared to 27% for
the same period in the prior year.  The  improvement  was  primarily  due to the
royalties recognized on Schering-Plough's  sales of PEG-INTRON.  Schering-Plough
bears all  manufacturing  costs related to PEG-INTRON.  The improvement was also
due to the prior year's  write-off  of ONCASPAR  finished  goods  related to the
previously discussed manufacturing problems.

Research  and  Development.  Research  and  development  expenses  increased  by
$3,318,000  to  $8,830,000  for the  nine  months  ended  March  31,  2001  from
$5,512,000  for the same  period  in the prior  year.  The  increase  was due to
increased  payroll and related  expenses due to increases in research  personnel
and  increased  contracted  services  related  to Phase I  clinical  trials  and
pre-clinical  studies  for  products  under  development,   including  PROTHECAN
(PEG-camptothecin) and PEG-paclitaxel.

Selling,  General  and  Administrative.   Selling,  general  and  administrative
expenses for the nine months ended March 31, 2001  decreased  by  $1,835,000  to
$8,229,000,  as compared to  $10,064,000 in 2000. The decrease was primarily due
to prior year's net charge  recorded of $2,579,000 in the prior year,  which was
the result of a binding  arbitration  award  related  to a lawsuit  brought by a
former financial  advisor.  The decrease was partially offset by increased legal
fees associated with patent filings and litigation costs.

Other  income/expense.  Other income/expense for the nine months ended March 31,
2001 was $6,434,000,  as compared to $1,042,000 for the same period in the prior
year. The increase in other  income/expense  is  attributable  to an increase in
interest income as a result of an increase in interest bearing investments.

Provision  for taxes.  We expect to be  profitable  for the year ending June 30,
2001,  and  accordingly  we have  recognized a tax provision for the nine months
ended March 31, 2001. The tax provision  represents our anticipated  Alternative
Minimum Tax liability based on the fiscal 2001 taxable income. The tax provision
was offset by the sale of a portion of our net operating losses for the state of
New Jersey.  During March 2001, we sold approximately  $833,000 of our state net
operating loss carry forwards and recognized a tax benefit of $728,000 from this
sale.

Liquidity and Capital Resources

     Total cash reserves,  including cash and cash equivalents,  as of March 31,
2001 were  $127,660,000,  as compared to  $118,413,000  as of June 30, 2000. The
increase in total cash  reserves was  primarily the result of cash provided from
the  exercise of  non-qualified  stock  options.  We invest our excess cash in a
portfolio  of  high-grade   marketable   debt   securities   and  United  States
government-backed securities.

     To date,  our sources of cash have been the  proceeds  from the sale of our
stock through public offerings and private placements, sales of and royalties on
sales of, ADAGEN,  ONCASPAR, and PEG-INTRON,  sales of our products for research
purposes,  contract  research  and  development  fees,  technology  transfer and
license fees and royalty advances.

     Under our  amended  license  agreement  with RPR,  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 RPR
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 expenses
on the consolidated  balance sheets. We will reduce the advance as royalties are
recognized  under  the  agreement.  Through  March 31,  2001,  an  aggregate  of
$4,307,000  in  royalties  payable by RPR has been offset  against the  original
credit.

     As of March 31, 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


                                      -11-



preferred   shares   outstanding  at  March  31,  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 March 31, 2001, there were accrued and unpaid dividends  totaling $154,000 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 sales of our products for research  purposes 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 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.  We
cannot assure you,  however,  that we will be able to obtain additional funds on
acceptable terms, if at all.

New Accounting Pronouncement

     In December  1999,  the  Securities  and Exchange  Commission  issued Staff
Accounting  Bulletin  No. 101 ("SAB  101"),  "Revenue  Recognition  in Financial
Statement".  SAB 101 provides guidance on applying generally accepted accounting
principles to revenue  recognition issues in financial  statements.  The Company
will adopt SAB 101 in the fourth  quarter of fiscal 2001 and does not expect the
adoption  of this SAB to have a  material  effect on the  Company's  results  of
operations or financial position.

Item 3.  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 available for sale and are
recorded  on the  balance  sheet at fair value with  unrealized  gains or losses
reported as a separate  component of stockholder's  equity.  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 March 31, 2001 all of our holdings were in instruments maturing
in three years or less.

The table below  presents the  principal  amounts and related  weighted  average
interest  rates by fiscal year of maturity  for our  investment  portfolio as of
March 31, 2001.



                                          2001            2002            2003            2004           Total           Fair Value
                                          ----            ----            ----            ----           -----           ----------
                                                                                                      
Fixed Rate                            $ 9,838,000     $60,622,000     $11,224,000     $ 10,237,000     $ 91,921,000     $ 93,119,000
Average Interest Rate                        5.81%           6.71%           5.02%            7.21%            6.46%            --
Variable Rate                                --         4,999,000      10,005,000             --         15,004,000       14,994,000
Average Interest Rate                        --              6.77%           6.96%            --               6.90%            --
                                      -----------     -----------     -----------     ------------     ------------     ------------
                                      $ 9,838,000     $65,621,000     $21,229,000     $ 10,237,000     $106,925,000     $108,113,000
                                      ===========     ===========     ===========     ============     ============     ============


Item 5. Other Information

On February 22, 2001, the Company's Board of Directors  elected Jeffrey McGuire,
Ph.D.  as an  executive  officer  of the  Company.  Dr.  McGuire  serves  as the
Company's Vice President, Research and Development and Chief Scientific Officer.


                                      -12-



PART II OTHER INFORMATION
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)
          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)
          10.4      Lease Termination Agreement dated March 31, 1995 for
                    20 Kingsbridge Road and 40 Kingsbridge Road, Piscataway,
                    New Jersey                                                                   ###(10.6)
          10.5      Option Agreement dated April 1, 1995 regarding 20 Kingsbridge
                    Road, Piscataway, New Jersey                                                 ###(10.7)
          10.6      Form of Lease - 40 Cragwood Road, South Plainfield, New Jersey              ****(10.9)
          10.7      Lease 300A-B Corporate Court, South Plainfield, New Jersey                   ++(10.10)
          10.8      Stock Purchase Agreement dated March 5, 1987 between the
                    Company  and Eastman Kodak Company                                          ****(10.7)
          10.9      Amendment dated June 19, 1989 to Stock Purchase Agreement
                    between the Company and Eastman Kodak Company                                **(10.10)
         10.10      Form of Stock Purchase Agreement between the Company
                    and the purchasers of the Series A Cumulative
                    Convertible Preferred Stock                                                   +(10.11)
         10.11      Amendment to License Agreement and Revised License Agreement
                    Between the Company and RCT dated April 25, 1985                             +++(10.5)
         10.12      Amendment dated as of May 3, 1989 to Revised License Agreement
                    Dated April 25, 1985 between the Company and Research
                    Corporation                                                                  **(10.14)
         10.13      License Agreement dated September 7, 1989 between the Company
                    and Research Corporation Technologies, Inc.                                  **(10.15)
         10.14      Master Lease Agreement and Purchase Leaseback Agreement dated
                    October 28, 1994 between the Company and Comdisco, Inc.                       #(10.16)
         10.15      Employment Agreement with Peter G. Tombros dated as of
                    August 10, 2000                                                              //(10.15)
         10.16      Stock Purchase Agreement dated as of June 30, 1995                            ~(10.16)
         10.17      Securities Purchase Agreement dated as of January 31, 1996                    ~(10.17)
         10.18      Registration Rights Agreements dated as of January 31, 1996                   ~(10.18)
         10.19      Warrants dated as of February 7, 1996 and issued pursuant to the
                    Securities Purchase Agreement dated as of January 31, 1996                    ~(10.19)
         10.20      Securities Purchase Agreement dated as of March 15, 1996                     ~~(10.20)
         10.21      Registration Rights Agreement dated as of March 15, 1996                     ~~(10.21)
         10.22      Warrant dated as of March 15, 1996 and issued pursuant to the
                    Securities Purchase Agreement dated as of March 15, 1996                    ~~ (10.22)



                                      -13-



                                                                                             
         10.23      Amendment dated March 25, 1994 to License Agreement dated
                    September 7, 1989 between the Company and Research
                    Corporation  Technologies, Inc.                                             ~~~(10.23)
         10.24      Independent Directors' Stock Plan                                           ~~~(10.24)
         10.25      Stock Exchange Agreement dated February 28, 1997, by and between
                    the Company and GFL Performance Fund Ltd                                      ^(10.25)
         10.26      Agreement Regarding Registration Rights Under Registration Rights
                    Agreement dated March 10, 1997, by and between the Company
                    and Clearwater Fund IV LLC                                                    ^(10.26)
         10.27      Common Stock Purchase Agreement dated June 25, 1998                          ^^^(10.27)
         10.28      Placement Agent Agreement dated June 25, 1998 with SBC Warburg
                    Dillon Read, Inc.                                                          ^^^^(10.28)
         10.29      Underwriting Agreement dated March 20,2000 with Morgan
                    Stanley & Co. Inc., CIBC World Markets Corp., and SG
                    Cowen Securities Corporation                                                  /(10.29)


     *    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 exhibits to the  Company's  Annual Report on Form
          10-K for the fiscal year ended June 30, 1989 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 exhibits to the Company's  Registration  Statement
          on  Form  S-1  (File  No.  2-96279)  filed  with  the  Commission  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.

     +++  Previously  filed as an exhibit to the Company's Annual Report on Form
          10-K for the fiscal year ended June 30, 1985 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, 1994 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.


                                      -14-



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

     ^^^  Previously filed as an exhibit to the Company's Registration Statement
          on Form  S-3  (File  No.  333-58269)  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,  1998 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.

(b) Reports on Form 8-K.

On January 22, 2001 we filed with the  Commission  a Current  Report on Form 8-K
dated January 22, 2001 reporting that Schering-Plough  Corporation received U.S.
Food and Drug  Administration  (FDA) approval for PEG-INTRON(TM)  (peginterferon
alfa-2b)  Powder for Injection as once-weekly  monotherapy  for the treatment of
chronic hepatitis C in patients not previously treated with alpha interferon who
have compensated liver disease and are at least 18 years of age.

On February 6, 2001 we filed with the  Commission  a Current  Report on Form 8-K
dated February 6, 2001 reporting that  Schering-Plough  submitted a supplemental
Biologics License  Application (sBLA) to the U.S. FDA seeking marketing approval
for PEG-INTRON Powder for Injection for use in combination  therapy with REBETOL
Capsules  for the  treatment  of chronic  hepatis C in patients  not  previously
treated with  interferon  alpha who have  compensated  liver  disease and are at
least 18 years of age.

On February 16, 2001 we filed with the  Commission a Current  Report on Form 8-K
dated February 7, 2001 reporting the Company's  financial results for the second
quarter of fiscal year 2001.

On February 16, 2001, we filed with the  Commission a Current Report on Form 8-K
dated   February  16,  2001   reporting   the   following   Company   statement:
"PEG-INTRON(TM)   and   INTRON(R)A   are   manufactured   at   Schering-Plough's
biotechnology  manufacturing  facility in County Cork  (Brinny),  Ireland".  The
statement   pertained   to   Schering-Plough   Corporation's   announcement   on
manufacturing issues as a result of FDA inspections at its New Jersey and Puerto
Rico facilities.

On March 26,  2001 we filed  with the  Commission  a Current  Report on Form 8-K
dated March 23, 2001 reporting  that  Schering-Plough  Corporation  was notified
verbally   by  the  FDA  that   priority   review   status   was   assigned   to
Schering-Plough's sBLA Application seeking marketing approval for PEG-INTRON for
use in combination therapy with REBETOL. Priority review status provides for FDA
action within six months from the date of receipt of the application.

On March 30,  2001 we filed  with the  Commission  a Current  Report on Form 8-K
dated  March 28, 2001  reporting  that  Schering-Plough  was  informed  that the
European Union (EU) granted  centralized  marketing  authorization  to PEGINTRON
Injection and REBETOL Capsules as combination  therapy for the treatment of both
relapsed and naive  (previously  untreated)  adult patients with  histologically
proven chronic hepatitis C.


                                      -15-



                                   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: May 15, 2001                          By: /Peter G. Tombros
                                               ---------------------------------
                                            Peter G. Tombros
                                            President and Chief Executive
                                             Officer



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