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) February 7, 2001


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



       Delaware                        0-12957                     22-237286
(State or other jurisdiction        (Commission                  (IRS Employer
     of 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
                                                           --------------


                                      N/A
          (Former name or former address, if changed since last report)





Item 5.  Other Events
---------------------

ENZON REPORTS SECOND QUARTER FISCAL YEAR 2001 EARNINGS
------------------------------------------------------


     Enzon, Inc. announced today its financial results for the second quarter of
fiscal year (FY) 2001.  For the  quarter,  the Company  reported net earnings of
$2,137,000 or $0.05 per diluted  share,  as compared to a net loss of $1,510,000
or $0.04 per diluted share, for the same period in FY 2000. The earnings for the
quarter were principally due to increased sales and royalties earned on sales of
products  which  utilize the Company's PEG  technology,  and increased  interest
income resulting from capital raised in the Company's public offering  completed
in March 2000.  The Company had total cash and  interest-bearing  investments of
approximately $122 million as of December 31, 2000.

     Sales and royalties earned on sales of products which utilize the Company's
PEG technology,  increased by approximately $2,255,000 or 60% during the quarter
ended  December  31,  2000,  as  compared to the prior  year,  primarily  due to
increased  ONCASPAR(R)  sales and the royalties  earned on sales of  PEG-INTRON.
PEG-INTRON  was approved by the European Union in May 2000 and is now being sold
in Europe for the  treatment  of  hepatitis  C.  PEG-INTRON  received  marketing
authorization  from the United  States Food and Drug  Administration  in January
2001 and is expected to be available in the United States  beginning in February
2001. PEG-INTRON is a modified form of Schering-Plough's  INTRON(R)A (interferon
alfa-2b,  recombinant)  that was developed  using Enzon's PEG technology to have
longer-acting   properties.   Under  the  Company's   licensing  agreement  with
Schering-Plough, Enzon is entitled to royalties on worldwide sales of PEG-INTRON
and milestone payments.

     The  increase  in  ONCASPAR  sales  was  due to  the  lifting  of  the  FDA
distribution and labeling  restrictions  that had been in place during the prior
year's second quarter. These restrictions were related to a previously disclosed
manufacturing problem and resulted in the prior year's sales being significantly
lower.  During  October  2000,  the FDA gave  final  approval  to the  Company's
manufacturing  changes 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 the
Company's marketing partner,  Aventis  Pharmaceuticals  (formerly  Rhone-Poulenc
Rorer Pharmaceuticals,  Inc.), which is expected to take place in calendar 2001.
Resumption of normal  distribution and labeling will result in lower revenues to
Enzon from this product in future quarters when Aventis resumes  distribution of
the product and the  Company's  revenue  stream  reverts back to a 27.5% royalty
rate on net sales.

     Cost of sales,  as a percentage of sales,  decreased to 15%, as compared to
21% for the comparable quarter of the previous year. The decrease was due to the
resolution of the  previously  disclosed  ONCASPAR  manufacturing  problem which
resulted in prior year inventory reserves and manufacturing  inefficiencies,  as
well as the  royalty  revenue  related  to  PEG-INTRON  which  does  not  have a
corresponding  cost of  sales.  Schering-Plough  bears all  manufacturing  costs
related to PEG-INTRON.

     Research and  development  expenses for the quarter ended December 31, 2000
increased by 30% to $2,509,000,  as compared to $1,933,000 for the quarter ended
December  31,  1999.  The  increase  was due  primarily to increases in research
personnel and increased expenses related to






clinical and preclinical activities for PROTHECAN(TM), PEG-paclitaxel, and other
PEG  products  in  preclinical  development.   The  Company  filed  an  IND  for
PEG-paclitaxel  during  December  2000 and is planning to begin Phase I clinical
trials during the first half of calendar 2001. Research and development expenses
are  expected  to  continue  to  increase   significantly   as   PROTHECAN   and
PEG-paclitaxel  advance  further along in clinical  development  and  additional
compounds enter clinical trials.

     Selling, general and administrative expenses for the quarter ended December
31, 2000 decreased by 11% to $2,514,000, as compared to $2,810,000 for the prior
year. This decrease was primarily due to the timing of  expenditures  related to
legal fees associated with patent filing and litigation costs.

     Interest and dividend  income for the second  quarter FY 2001  increased by
$1,756,000  to  $2,055,000,  as compared to  $299,000  for the prior year.  This
increase was due to an increase in interest bearing investments.

     For the six months ended December 31, 2000, the Company reported net income
of  $2,709,000  or  $0.06  per  diluted  share,  as  compared  to a net  loss of
$3,460,000  or $0.09 per diluted  share for the six months  ended  December  31,
1999.  The earnings for the current year period were  primarily due to increased
sales and royalties  earned on sales of products which utilize the Company's PEG
technology   and   increased   interest   income  as  a  result   of   increased
interest-bearing investments.





                          ENZON, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                  Three Months ended December 31, 2000 and 1999
                                   (unaudited)



                                                                     December 31,                December 31,
                                                                         2000                        1999
                                                                   --------------------------------------------
                                                                                            
Revenues:
Sales and royalties                                                   $6,002,201                  $3,746,768
Contract revenue                                                          16,944                      18,304
                                                                       ---------                   ---------
Total revenues                                                         6,019,145                   3,765,072
                                                                       ---------                   ---------
Costs and expenses:
  Cost of sales                                                          871,024                     792,921
  Research and development expenses                                    2,508,672                   1,932,969
  Selling, general and administrative expenses                         2,513,810                   2,810,438
                                                                       ---------                   ---------

  Total costs and expenses                                             5,893,506                   5,536,328
                                                                       ---------                   ---------
 Operating income (loss)                                                 125,639                  (1,771,256)
                                                                       ---------                   ---------
Other income (expense):
  Interest and dividend income                                         2,055,488                     298,725
  Interest expense                                                            --                       (926)
  Other                                                                     (22)                    (36,274)
                                                                       ---------                   ---------
                                                                       2,055,466                     261,525
                                                                       ---------                   ---------

Net income (loss) before taxes                                         2,181,105                 ($1,509,731)

     Provision for income taxes                                           43,622                          --
                                                                       ---------                  ----------

     Net income (loss) after taxes                                    $2,137,483                 ($1,509,731)
                                                                       =========                  ==========


Basic earnings (loss) per common share                                     $0.05                      ($0.04)
                                                                           =====                     =======

Diluted earnings (loss) per common share                                   $0.05                      ($0.04)
                                                                           =====                     =======

Weighted average number of common shares
  issued and outstanding                                              41,568,723                  37,020,464
                                                                      ==========                  ==========

Weighted average number of common shares issued
  and outstanding and dilutive potential common shares                43,850,319                  37,020,464
                                                                      ==========                  ==========






                          ENZON, INC. AND SUBSIDIARIES
                      CONSOLIDATED STATEMENTS OF OPERATIONS
                   Six Months ended December 31, 2000 and 1999
                                   (unaudited)




                                                                                December 31,             December 31,
                                                                                    2000                     1999
                                                                             -----------------------------------------
                                                                                                   
Revenues:
Sales and royalties                                                             $10,949,469              $6,616,903
Contract revenue                                                                    243,290                  61,982
                                                                                 ----------               ---------
Total revenues                                                                   11,192,759               6,678,885
                                                                                 ----------               ---------
Costs and expenses:
  Cost of sales                                                                   1,872,212               1,971,482
  Research and development expenses                                               5,145,269               3,590,252
  Selling, general and administrative expenses                                    5,588,037               5,136,409
                                                                                  ---------               ---------

  Total costs and expenses                                                       12,605,518              10,698,143
                                                                                 ----------              ----------
      Operating loss                                                             (1,412,759)             (4,019,258)
                                                                                 ----------              ----------
Other income (expense):
  Interest and dividend income                                                    4,164,701                 599,222
  Interest expense                                                                       --                  (3,884)
  Other                                                                              11,869                 (36,274)
                                                                                 ----------              ----------
                                                                                  4,176,570                 559,064
                                                                                 ----------              ----------

Net income (loss) before taxes                                                    2,763,811              (3,460,194)

     Provision for income taxes                                                      55,276                      --
                                                                                 ----------              ----------

     Net income (loss) after taxes                                               $2,708,535             ($3,460,194)
                                                                                 ==========              ==========


Basic earnings (loss) per common share                                                $0.07                  ($0.09)
                                                                                      =====                 =======

Diluted earnings (loss) per common share                                              $0.06                  ($0.09)
                                                                                      =====                 =======

Weighted average number of common shares
  issued and outstanding                                                         41,335,006               36,835,399
                                                                                 ==========               ==========

  Weighted average number of common shares issued and outstanding and
  dilutive potential common shares                                               43,555,087               36,835,399
                                                                                 ==========               ==========






     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 Enzon's Form 10-K,  Form 10-Q's and Form 8-K on
file  with  the SEC,  including  without  limitation,  risks  in  obtaining  and
maintaining  regulatory  approval for Enzon's products and expanded  indications
for such  products,  market  acceptance  of and  continuing  demand for  Enzon's
products and the impact of competitive products and pricing.






                                   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:   February 13, 2000


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


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