UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                     [OBJECT OMITTED]WASHINGTON, D.C. 20549
                                  SCHEDULE 13G
                                (AMENDMENT NO. 4)

                    Under the Securities Exchange Act of 1934


                               Celsion Corporation
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    15117n305
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                 August 13, 2009
--------------------------------------------------------------------------------
             (Date of Event which Required Filing of this Statement)


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

|X| Rule 13d-1(b)
|_| Rule 13d-1(c)
|_| Rule 13d-1(d)

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).








-----------------------------------------                    -------------------
CUSIP NO.  15117N305                      SCHEDULE 13G       PAGE 2 OF 6 PAGES
-----------------------------------------                    -------------------

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

   1      NAME OF REPORTING PERSON
          SS. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Ironwood Investment Management, LLC

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

   2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP               (A) |_|
                                                                         (B) |X|
--------- ----------------------------------------------------------------------
          SEC USE ONLY
   3

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

   4      CITIZENSHIP OR PLACE OF ORGANIZATION

          Massachusetts
----------------------- --------- ----------------------------------------------
                           5
                                  SOLE VOTING POWER
                                  56,640

                        --------- ----------------------------------------------
   NUMBER OF SHARES        6
BENEFICIALLY OWNED BY             SHARED VOTING POWER
EACH REPORTING PERSON             0
         WITH           --------- ----------------------------------------------
                           7
                                  SOLE DISPOSITIVE POWER
                                  56,640
                        --------- ----------------------------------------------
                           8
                                  SHARED DISPOSITIVE POWER
                                  0
----------- --------------------------------------------------------------------
    9
            AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            56,640
------------ -------------------------------------------------------------------
    10
             CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
                                                                    SHARES   |_|

------------ -------------------------------------------------------------------
    11
             PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
             0.56%

------------ -------------------------------------------------------------------
    12
             TYPE OF REPORTING PERSON
             IA
------------ -------------------------------------------------------------------





-----------------------------------------                    -------------------
CUSIP NO. 15117N305                       SCHEDULE 13G       PAGE 3 OF 6 PAGES
-----------------------------------------                    -------------------


Item 1.    (a).     Name of Issuer: CELSION CORPORATION

           (b).     Address of Issuer's Principal Executive Offices:

                      10220-L Old Columbia Road
                      Columbia, MD21046

Item 2.    (a).     Name of Person Filing:

                      Ironwood Investment Management, LLC

           (b).     Address of Principal Business Office or, if none, Residence:

                       Ironwood Investment Management, LLC
                       21 Custom House Street, Suite 240
                       Boston, MA 02110

           (c).     Citizenship or Place of Organization: Massachusetts

           (d).     Title of Class of Securities: Common Stock

           (e).     CUSIP Number: 15117N305






Item 3.    If this statement is filed pursuant to sections
           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)      [x] An investment adviser in accordance with
                    section 240.13d-1(b)(1)(ii)(E);
           (f)      [ ] An employee benefit plan or endowment fund in
                    accordance with section 240.13d-1(b)(1)(ii) (F);
           (g)      [ ] A parent holding company or control person in
                    accordance with section 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 section
                    240.13d-1(b)(1) (ii)(J).

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.

           (a).     Amount beneficially owned: 56,640

           (b).     Percent of class: 0.56%

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

                    (1)    Sole power to vote or to direct the vote:   56,640
                                                                       -------

                    (2)    Shared power to vote or to direct the vote: 0
                                                                       -

                    (3)    Sole power to dispose or to direct the disposition
                                                                     of: 56,640
                                                                         -------


                    (4)    Shared power to dispose or to direct the disposition
                                                                         of:   0
                                                                               -

Item 5.    Ownership of Five Percent or Less of a Class:

           Yes

Item 6.    Ownership of More Than Five Percent on Behalf of Another Person:

           Not Applicable

Item 7.    Identification and Classification of Subsidiaries which Acquired the
           Security Being Reported on by the Parent Holding Company:

           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:

           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 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.





                                    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.

                                            IRONWOOD INVESTMENT MANAGEMENT, LLC


Date:    September __, 2009                 By:
                                                --------------------------------
                                                Charles J. Daly,
                                                Chief Compliance Officer