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

                                 SCHEDULE 13G/A

                   UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 1)*
                           EXACT SCIENCES CORPORATION
                                (Name of Issuer)

                          COMMON STOCK, PAR VALUE $.01
                         (Title of Class of Securities)

                                   30063P105
                                 (CUSIP Number)

                                OCTOBER 15, 2010
            (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[_]     Rule 13d-1(b)
[X]     Rule 13d-1(c)
[_]     Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED IN THIS
FORM ARE NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY VALID OMB
CONTROL NUMBER.

SEC 1745 (12-02)




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CUSIP No. 30063P105                   13G/A                    Page 2 of 7 Pages

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1. NAMES OF REPORTING PERSONS

          I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

          PERCEPTIVE ADVISORS LLC

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          2. CHECK THE APPROPRIATE BOX IF A GROUP*                        (a)
                                                                          (b)
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          3. SEC USE ONLY

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          4. CITIZENSHIP OR PLACE OF ORGANIZATION

          DELAWARE

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    NUMBER OF
      SHARES             5. SOLE VOTING POWER                                  0
------------------- ---- -------------------------------------------------------
   BENEFICIALLY
     OWNED BY            6. SHARED VOTING POWER                        1,789,289
------------------- ---- -------------------------------------------------------
       EACH
    REPORTING            7. SOLE DISPOSITIVE POWER                             0
------------------- ---- -------------------------------------------------------
   PERSON WITH:
                         8. SHARED DISPOSTIVE POWER                    1,789,289
--------------------------------------------------------------------------------

          9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                       1,789,289
--------------------------------------------------------------------------------

         10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
              EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
--------------------------------------------------------------------------------

--------- ----------------------------------------------------------------------
         11.  PERCENT  OF  CLASS  REPRESENTED  BY AMOUNT IN ROW (9)         4.4%

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         12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)                      IA
--------- ----------------------------------------------------------------------


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CUSIP No. 30063P105                   13G/A                    Page 3 of 7 Pages

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         13. NAMES OF REPORTING PERSONS
             I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

          JOSEPH EDELMAN

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

          14. CHECK THE APPROPRIATE BOX IF A GROUP*                         (a)
                                                                            (b)
--------- ----------------------------------------------------------------------

          15. SEC USE ONLY

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

          16. CITIZENSHIP OR PLACE OF ORGANIZATION

          UNITED STATES OF AMERICA

--------- ----------------------------------------------------------------------
    NUMBER OF
      SHARES             17. SOLE VOTING POWER                                 0
------------------- ---- -------------------------------------------------------
   BENEFICIALLY
     OWNED BY            18. SHARED VOTING POWER                       1,789,289
------------------- ---- -------------------------------------------------------
       EACH
    REPORTING            19. SOLE DISPOSITIVE POWER                            0
------------------- ---- -------------------------------------------------------
   PERSON WITH:
                         20. SHARED DISPOSTIVE POWER                   1,789,289
--------- ----------------------------------------------------------------------

          21. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                                                                       1,789,289
--------- ----------------------------------------------------------------------

       22.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
            EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
--------------------------------------------------------------------------------

--------- ----------------------------------------------------------------------
       23.  PERCENT  OF  CLASS  REPRESENTED  BY AMOUNT IN ROW (9)           4.4%

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

          24. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)                     IN
--------- ----------------------------------------------------------------------




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CUSIP No. 30063P105                   13G/A                    Page 4 of 7 Pages

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ITEM 1.
(a) Name of Issuer: Exact Sciences Corporation

                                                          441 Charmany Drive
     (b) Address of Issuer's Principal Executive Offices: Madison WI 53719

ITEM 2.

                              This Schedule 13G/A (the "Schedule") is being
                              filed with respect to shares of Common Stock (as
   (a) Name of Person Filing: defined below) of Exact Sciences Corporation (the
                              "Issuer") which are beneficially owned by
                              Perceptive Advisors LLC and Joseph Edelman
                              (together, the "Reporting Persons"). See Item 4
                              below.

   (b) Address of Principal   Perceptive Advisors LLC 499 Park Avenue,
       Business Office or,    25th Floor
       if none,  Residence:   New York, NY 10022


   (c) Citizenship:           Perceptive Advisors LLC is a Delaware
                              limited liability company and
                              Joseph Edelman is a United States Citizen.

   (d) Title of Class of
       Securities:            Common Stock, par value $.01 (the "Common Stock")


   (e)  CUSIP Number:        30063P105


ITEM 3 IF THIS STATEMENT IS FILED PURSUANT TO ss.ss.240.13D-1(B) OR 240.13D-2(B)
       OR (C), CHECK WHETHER THE . PERSON FILING IS A:

     (a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C.
     78o).

     (b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

     (c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15
     U.S.C. 78c).

     (d) [ ] Investment company registered under section 8 of the Investment
     Company Act of 1940 (15 U.S.C 80a-8).

     (e) [ ] An investment adviser in accordance with ss.240.13d-1(b)(1)(ii)(E);

     (f) [ ] An employee benefit plan or endowment fund in accordance with
     ss.240.13d-1(b)(1)(ii)(F);

     (g) [ ] A parent holding company or control person in accordance with ss.
     240.13d-1(b)(1)(ii)(G);

     (h) [ ] A savings associations as defined in Section 3(b) of the Federal
     Deposit Insurance Act (12 U.S.C. 1813);

     (i) [ ] A church plan that is excluded from the definition of an investment
     company under section 3(c)(14) of the Investment Company Act of 1940 (15
     U.S.C. 80a-3); (j) [ ] Group, in accordance with ss.240.13d-1(b)(1)(ii)(J).



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CUSIP No. 30063P105                   13G/A                    Page 5 of 7 Pages

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ITEM 4.  OWNERSHIP.

Provide the following information regarding the aggregate number and percentage
of the class of securities of the issuer identified in Item 1.

                               The Reporting Persons beneficially own 1,789,289
                               shares of Common Stock held by a private
(a) Amount beneficially owned: investment fund to which Perceptive Advisors LLC
                               serves as the investment manager. Mr. Edelman is
                               the managing member of Perceptive Advisors LLC.

                               The beneficial ownership of 4.4% is based on the
(b)  Percent of class:         40,277,937 outstanding shares of Common Stock of
                               the Issuer, as disclosed on the Issuer's Form
                               10-Q filed with the SEC on August 8, 2010.

(c)  Number of  shares  as  to  which the  person has:

(i)   Sole power to vote or to direct the vote:                                0

(ii)  Shared power to vote or to direct the vote:                      1,789,289

(iii) Sole  power to dispose or to direct the disposition of:                  0

(iv)  Shared power to dispose or to direct the disposition of:         1,789,289

ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

If  this  statement is being filed to report the fact that as of the date hereof
the  reporting  person  has  ceased to be the beneficial owner of more than five
percent of the class of securities, check the following [X].




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CUSIP No. 30063P105                   13G/A                    Page 6 of 7 Pages

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ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

As referred to in Item 4, other persons have the right to receive and the power
to direct the receipt of dividends from, and the proceeds from the sale of,
certain of the shares reported herein. In that regard, Mr. Edelman is the
managing member of Perceptive Advisors LLC, the investment manager of a private
investment fund. Accordingly, the private investment fund has the right to
receive and the power to direct the receipt of, dividends and the proceeds from
the sale of the shares reported herein that are held through the private
investment fund.

ITEM  7.  IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR CONTROL PERSON.

Not applicable.


ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

Not applicable.


ITEM 9. NOTICE OF DISSOLUTION OF GROUP.

Not applicable.

ITEM 10.  CERTIFICATION

           The  following  certification  shall  be included if the statement is
           filed pursuant to ss.240.13d-1(b):

          By signing below I certify that, to the best of my knowledge and
          belief, the securities referred to above were acquired and are held in
          the ordinary course of business and were not acquired and are not held
 (a)      for the purpose of or with the effect of changing or influencing the
          control of the issuer of the securities and were not acquired and are
          not held in connection with or as a participant in any transaction
          having that purpose or effect. [X]




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CUSIP No. 30063P105                   13G/A                    Page 7 of 7 Pages

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                                   SIGNATURE

      After  reasonable  inquiry  and  to the best of my knowledge and belief, I
certify  that  the information set forth in this statement is true, complete and
correct.

October 21, 2010
----------------
Date

PERCEPTIVE ADVISORS LLC

/s/ Joseph Edelman
------------------
Signature

Joseph Edelman/Managing Member
------------------------------
Name/Title
October 21, 2010
Date

/s/ Joseph Edelman
------------------
Signature

Joseph Edelman
--------------
Name/Title

The original statement shall be signed by each person on whose behalf the
statement is filed or his authorized representative. If the statement is signed
on behalf of a person by his authorized representative other than an executive
officer or general partner of the filing person, evidence of the
representative's authority to sign on behalf of such person shall be filed with
the statement, provided, however, that a power of attorney for this purpose
which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or
printed beneath his signature.

NOTE: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See ss.240.13d-7 for other
parties for whom copies are to be sent.

ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL
CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001)