SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported) August 21, 2001

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

           Delaware                   0-12957                    22-2372868
(State or other jurisdiction of     (Commission                 (IRS Employer
        incorporation)              File Number)               Identification)


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



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


                                       NA
          (Former name or former address, if changed since last report





Item 5.  Other Events

     On August 21, 2001, Enzon, Inc.  ("Enzon") reported that net income of $3.3
million or $0.08 per  diluted  share for the fourth  quarter of fiscal year (FY)
ended June 30,  2001,  as  compared  to a net loss of $1.2  million or $0.03 per
diluted  share for the same period in FY 2000.  The increase in earnings for the
quarter was principally due to increased  royalties from marketed  products that
utilize Enzon's PEG technology.

     Royalties   earned  on  sales  of  products,   which  utilize  Enzon's  PEG
technology,  increased to $4.5 million  during the fourth quarter of FY 2001, as
compared to $34,000 for the same period in FY 2000.  The increase was  primarily
due to royalties  earned on sales of  PEG-INTRON(TM)  by our marketing  partner,
Schering-Plough  Corporation.  The European Union granted  PEG-INTRON  marketing
authorization  as a monotherapy  in May 2000 and as a  combination  therapy with
REBETOL(R) in March 2001 for the treatment of chronic hepatitis C. Additionally,
in February 2001,  Schering-Plough launched PEG-INTRON in the United States as a
once-weekly  monotherapy  for the  treatment of hepatitis C.  PEG-INTRON  is the
first and only pegylated  interferon  monotherapy  approved for marketing in the
United States.  In August 2001, the U.S. Food and Drug  Administration  approved
PEG-INTRON  for use in  combination  therapy  with  REBETOL(R)  Capsules for the
treatment of chronic  hepatitis C. The PEG-INTRON and REBETOL  treatment regimen
is the first and only pegylated interferon-based combination therapy approved in
the United States.

     PEG-INTRON  is a modified  form of  Schering-Plough's  INTRON(R)A  that was
developed using Enzon's PEG technology to have longer-acting properties. Enzon's
PEG  technology  involves  chemically  attaching  PEG  (polyethylene  glycol) to
therapeutic proteins or small molecules for the purpose of enhancing therapeutic
value. Under its licensing agreement with Schering-Plough,  Enzon is entitled to
royalties on worldwide sales of PEG-INTRON.

     Combined sales of Enzon's products  ONCASPAR(R) and ADAGEN(R)  increased by
38 percent to $5.8 million in the fourth  quarter of FY 2001, as compared to the
same  period in FY 2000.  Sales of  ONCASPAR  increased  by 61  percent  to $2.2
million.  Increased  ONCASPAR  sales were the  result of the  lifting of the FDA
labeling  restrictions  that had been in place  during the prior  year's  fourth
quarter,  related to a previously disclosed  manufacturing problem. ADAGEN sales
for the fourth  quarter of FY 2001  increased  by $734,000 to $3.6  million,  as
compared to the fourth quarter of FY 2000.



     Cost of sales,  as a  percentage  of sales,  decreased  to 17  percent,  as
compared to 44 percent for the  comparable  quarter of the  previous  year.  The
decrease was due to the write-off of certain ONCASPAR  finished goods during the
prior year's fourth  quarter.  This write-off was related to Enzon's  previously
disclosed ONCASPAR manufacturing problems.

     Research  and  development  expenses  for  the  fourth  quarter  of FY 2001
increased  by $1.3  million or 45 percent to $4.2  million as  compared  to $2.9
million for the fourth  quarter of FY 2000.  The increase  was due  primarily to
increased  research  and  development   expenditures  related  to  clinical  and
preclinical activities for PROTHECAN(R) (PEG-camptothecin),  PEG-paclitaxel, and
other PEG products in preclinical development.  In May 2001, Enzon began Phase I
clinical  trials of  PEG-paclitaxel,  a PEG modified  version of paclitaxel with
prodrug  attributes.   Phase  II  clinical  trials  for  Enzon's  lead  clinical
candidate,  PROTHECAN,  were  initiated in July 2001.  Research and  development
expenses are  expected to continue to increase  significantly  as PROTHECAN  and
PEG-paclitaxel  continue  to  advance in  clinical  development  and  additional
compounds enter clinical trials.

     Selling,  general and administrative  expenses for the fourth quarter of FY
2001  increased by $675,000 or 24 percent to $3.6  million,  as compared to $2.9
million for the fourth  quarter of FY 2000.  This  increase was primarily due to
increased legal fees,  related to increased patent filing and defense costs, and
increased marketing and distribution costs related to ONCASPAR sales.

     As of June 30, 2001, Enzon had total cash and interest-bearing  investments
of $516 million,  as compared to $128 million as of March 31, 2001. The increase
in cash and  interest-bearing  investments  was the result of Enzon's  June 2001
placement of $400 million in convertible notes.

     For the fiscal year ended June 30,  2001,  Enzon's  reported net income was
$11.5 million or $0.26 per diluted share, compared to a net loss of $6.3 million
or $0.17 per diluted share for the year ended June 30, 2000. The earnings for FY
2001 were  primarily  due to  increased  royalties  related to  products,  which
utilize Enzon's PEG technology.

     Except for the historical information herein, the matters discussed in this
Form 8-K include  forward-looking  statements that may involve a number of risks
and uncertainties.  Actual results may vary significantly based upon a number of
factors which are described in the Company's Form 10-K, Form 10-K/A, Form 10-Q's
and Form  8-Ks on file  with the SEC,



including  without  limitation,  risks in obtaining and  maintaining  regulatory
approval for  indications  and expanded  indications,  market  acceptance of and
continuing  demand for Enzon's  products and the impact of competitive  products
and pricing.


                        (Financial statements to follow)








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




                                                          June 30, 2001    June 30, 2000
                                                          -------------    -------------
                                                                     
Revenues:
  Net sales                                               $   5,828,935    $   4,232,612
  Royalties                                                   4,549,337           33,582
  Contract revenue                                               84,924          349,601
                                                          -------------    -------------
     Total revenues                                          10,463,196        4,615,795
                                                          -------------    -------------
Costs and expenses:
  Cost of sales                                               1,003,692        1,875,126
  Research and development expenses                           4,222,177        2,871,078
  Selling, general and administrative expenses                3,566,472        2,891,671
                                                          -------------    -------------
     Total costs and expenses                                 8,792,341        7,637,875
                                                          -------------    -------------
       Operating income (loss)                                1,670,855       (3,022,080)
                                                          -------------    -------------
Other income (expense):
  Interest and dividend income                                1,981,183        1,860,754
  Interest expense                                             (275,049)            --
  Other                                                          (2,725)            --
                                                          -------------    -------------
                                                              1,703,409        1,860,754
                                                          -------------    -------------
Income (loss) before taxes                                    3,374,264       (1,161,326)
Tax expense                                                      65,956             --
                                                          -------------    -------------
Net income (loss)                                         $   3,308,308    ($  1,161,326)
                                                          =============    =============
Basic earnings (loss) per common share                    $        0.08    ($       0.03)
                                                          =============    =============
Diluted earnings (loss) per common share                  $        0.08    ($       0.03)
                                                          =============    =============

Weighted average number of common
shares outstanding during the period                         41,935,820       40,716,468
                                                          =============    =============

Weighted average number of common
shares and dilutive potential common shares outstanding
during the period                                            43,956,840       40,716,468
                                                          =============    =============






                          ENZON, INC. AND SUBSIDIARIES
                 CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS
                       Years ended June 30, 2001 and 2000




                                                          June 30, 2001    June 30, 2000
                                                          -------------    -------------
                                                                     
Revenues:
  Net sales                                               $  20,940,633    $  15,557,906
  Royalties                                                   8,254,368           33,582
  Contract revenue                                            2,392,708        1,426,309
                                                          -------------    -------------
     Total revenues                                          31,587,709       17,017,797
                                                          -------------    -------------
Costs and expenses:
  Cost of sales                                               3,864,284        4,888,357
  Research and development expenses                          13,051,714        8,382,772
  Selling, general and administrative expenses               11,795,398       12,956,118
                                                          -------------    -------------
     Total costs and expenses                                28,711,396       26,227,247
                                                          -------------    -------------
       Operating income (loss)                                2,876,313       (9,209,450)
                                                          -------------    -------------
Other income (expense):
  Interest and dividend income                                8,401,526        2,943,311
  Interest expense                                             (275,049)          (4,051)
  Other                                                          10,627          (36,274)
                                                          -------------    -------------
                                                              8,137,104        2,902,986
                                                          -------------    -------------
Income (loss) before taxes                                   11,013,417       (6,306,464)
Tax benefit                                                     511,647             --
                                                          -------------    -------------
Net income (loss)                                         $  11,525,064    ($  6,306,464)
                                                          =============    =============
Basic earnings (loss) per common share                    $        0.28    ($       0.17)
                                                          =============    =============
Diluted earnings (loss) per common share                  $        0.26    ($       0.17)
                                                          =============    =============

Weighted average number of common
shares outstanding during the period                         41,602,104       38,172,515
                                                          =============    =============

Weighted average number of common
shares and dilutive potential common shares outstanding
during the period                                            43,606,194       38,172,515
                                                          =============    =============







                                   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 hereunto duly authorized.

Dated: August 21, 2001

                                                      ENZON, INC.
                                       -----------------------------------------
                                                     (Registrant)






                                  By:          /s/ KENNETH J. ZUERBLIS
                                       -----------------------------------------
                                       Kenneth J. Zuerblis
                                       Vice President, Finance, Chief Financial
                                          Officer and Corporate Secretary