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

                                 SCHEDULE 13D/A
                    Under the Securities Exchange Act of 1934

                                (Amendment No. 4)

                                 GSI Group Inc.

                                (Name of Issuer)

                           Common Stock, no par value

                         (Title of Class of Securities)

                                    36229U102

                                 (CUSIP Number)

                        Tennenbaum Capital Partners, LLC
                          2951 28th Street, Suite 1000
                         Santa Monica, California 90405
                                 (310) 566-1000


(Name, Address and Telephone Number of Person Authorized to Receive Notices and
                                 Communications)

                                 March 16, 2010
                               ------------------
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box
[ ].

Note: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7 for other parties
to whom copies are to be sent.

--------------------
* 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
disclosures provided in a prior cover page.

The information required on 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).

                          (Continued on following pages)
                               (Page 1 of 5 Pages)







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CUSIP No.  36229U102            SCHEDULE 13D/A        Page 2 of 5 Pages
----------------------------                        ----------------------------
------------- -----------------------------------------------------------------
     1        NAME OF REPORTING PERSON

              Tennenbaum Capital Partners, LLC (1)
------------- -----------------------------------------------------------------
     2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |_|  (b) |X|
------------- -----------------------------------------------------------------
     3        SEC USE ONLY
------------- -----------------------------------------------------------------
     4        SOURCE OF FUNDS

              AF
------------- -----------------------------------------------------------------
     5        CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
              TO ITEMS 2(d) or 2(e)     |_|
------------- -----------------------------------------------------------------
     6        CITIZENSHIP OR PLACE OF ORGANIZATION

              Delaware
------------- -----------------------------------------------------------------
 NUMBER OF    7           SOLE VOTING POWER

   SHARES                 1,325,135 shares
              ----------- -----------------------------------------------------
BENEFICIALLY  8           SHARED VOTING POWER

   OWNED                  0
              ----------- -----------------------------------------------------
  BY EACH     9           SOLE DISPOSITIVE POWER

 REPORTING                1,325,135 shares
              ----------- -----------------------------------------------------
  PERSON      10          SHARED DISPOSITIVE POWER

                          0
------------- ----------- -----------------------------------------------------
     11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

              1,325,135 shares
------------- -----------------------------------------------------------------
     12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
              SHARES |_|
------------- -----------------------------------------------------------------
     13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 11

              2.8% (2)
------------- -----------------------------------------------------------------
     14       TYPE OF REPORTING PERSON
              IA, OO
------------- -----------------------------------------------------------------
(1) Tennenbaum Capital Partners, LLC serves as investment advisor to, inter
alia, Special Value Opportunities Fund, LLC, a Delaware limited liability
company ("SVOF"), Special Value Expansion Fund, LLC, a Delaware limited
liability company ("SVEF"), Special Value Continuation Partners, LP, a Delaware
limited partnership ("SVCP"), and Tennenbaum Opportunities Partners V, LP, a
Delaware limited partnership ("TOP V"), which are the registered holders of
shares of Common Stock of GSI Group Inc. beneficially owned by Tennenbaum
Capital Partners, LLC.

(2) Based on 47,591,899 shares of Common Stock of GSI Group Inc. outstanding as
set forth by GSI Group Inc. in its Rule 424(b)(3) Prospectus filed with the
Securities and Exchange Commission on October 23, 2008.







----------------------------                        ----------------------------
CUSIP No.  36229U102            SCHEDULE 13D/A        Page 3 of 5 Pages
----------------------------                        ----------------------------

ITEM 1.       SECURITY AND ISSUER

     This Amendment No. 4 (the "Amendment") amends the statement on Schedule 13D
filed on July 2, 2009 (the  "Original  Schedule  13D", as amended  hereby and by
Amendment  No. 1 filed on November 20, 2009,  and Amendment No. 2 filed on March
3, 2010 and  Amendment No. 3 filed on March 16, 2010,  the "Schedule  13D") with
respect to the common  stock,  no par value (the "Common  Stock"),  of GSI Group
Inc., a company  continued  and  existing  under the laws of the Province of New
Brunswick,  Canada  (the  "Issuer").  Capitalized  terms  used  herein  and  not
otherwise  defined in this Amendment have the meanings set forth in the Schedule
13D. This Amendment amends Items 4, 6 and 7 as set forth below.


ITEM 4.       PURPOSE OF TRANSACTION

         Item 4 of the  Schedule  13D is  hereby  amended  and  supplemented  by
the addition of the following:

     On March 16, 2010 the Reporting  Person (or its  affiliates)  and the other
Consenting   Noteholders   entered  into  an  Amended  and  Restated  Noteholder
Restructuring  Plan Support  Agreement  (the  "Amended and Restated Plan Support
Agreement")  with the Issuer  Parties,  amending and  restating the Plan Support
Agreement.  Under the Amended and Restated  Plan Support  Agreement  the parties
thereto agreed to modifications to the Plan (the "Modified Plan") and to support
the Modified  Plan.  The Amended and Restated  Plan Support  Agreement  contains
specific  agreements by the Consenting  Noteholders with respect to voting their
claims in support of the Modified Plan as well as conditions to the  termination
of the Amended and  Restated  Plan  Support  Agreement  which are  substantially
similar to those contained in the Plan Support Agreement.

     As more fully  described in the Modified Plan,  under the Modified Plan the
Notes will be exchanged  for,  among other things,  New Senior Secured Notes (as
defined  in the  Modified  Plan) and New  Preferred  Shares  (as  defined in the
Modified Plan) which New Preferred  Shares will be convertible into common stock
of the  reorganized  Issuer.  The holders of the New Preferred  Shares will vote
together  with the holders of common  stock of the  reorganized  Issuer on an as
converted  basis. The terms of the New Preferred Shares are set forth as Exhibit
C to the Modified Plan. This  description of the Modified Plan is a summary only
and is qualified  in its  entirety by reference to the Modified  Plan, a copy of
which was filed as Exhibit A of Exhibit  10.1 of the Current  Report on Form 8-K
filed by the Issuer on March 19, 2010.

     This  description  of the Amended and Restated Plan Support  Agreement is a
summary  only and is  qualified  in its entirety by reference to the Amended and
Restated  Plan Support  Agreement,  a copy of which is  referenced  as Exhibit 7
hereto (which  incorporates  by reference  Exhibit 10.1 of the Current Report on
Form 8-K filed by the Issuer on March 19,  2010) and is  incorporated  herein by
reference.






----------------------------                        ----------------------------
CUSIP No.  36229U102            SCHEDULE 13D/A        Page 4 of 5 Pages
----------------------------                        ----------------------------

ITEM 6.       CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH
RESPECT TO SECURITIES OF THE ISSUER


Item 6 of the Schedule 13D is hereby amended and supplemented by the addition of
the following:

     As  described  in  Item 4  above,  on  March 16,  2010,  the  Consenting
Noteholders  entered into the Amended and Restated Plan Support  Agreement  with
the Issuer  Parties,  under which the parties  thereto  agreed to the terms of a
restructuring  of the Notes  pursuant to the  Modified  Plan, a copy of which is
referenced as Exhibit 7 hereto (which  incorporates by reference Exhibit 10.1 of
the  Current  Report on Form 8-K filed by the  Issuer on March 19,  2010) and is
incorporated herein by reference.

ITEM 7.       MATERIAL TO BE FILED AS EXHIBITS

Item 7 of the Schedule 13D is hereby amended and supplemented by the addition of
the following:

7. Amended and Restated Noteholder Restructuring Plan Support Agreement, dated
as of March 16, 2010, by and among the Consenting Noteholders and the Issuer
Parties (incorporated by reference to Exhibit 10.1 of the Current Report on Form
8-K filed by the Issuer on March 19, 2010).






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CUSIP No.  36229U102            SCHEDULE 13D/A        Page 5 of 5 Pages
----------------------------                        ----------------------------

                                    Signature

     After  reasonable  inquiry  and to the  best  of  such  Reporting  Person's
knowledge and belief,  the undersigned  certifies that the information set forth
in this statement is true, complete and correct.

     Dated: March 19, 2010

            TENNENBAUM CAPITAL PARTNERS, LLC,
            a Delaware limited liability company

            By: /s/ Elizabeth Greenwood
                ------------------------
                     Name:   Elizabeth Greenwood
                     Title:  General Counsel & Chief Compliance Officer