UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A Under the Securities Exchange Act of 1934 (Amendment No. 3) 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 12, 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 4 Pages) ---------------------------- ---------------------------- CUSIP No. 36229U102 SCHEDULE 13D/A Page 2 of 4 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 4 Pages ---------------------------- ---------------------------- ITEM 1. SECURITY AND ISSUER This Amendment No. 3 (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 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 Item 4 as set forth below. ITEM 4. PURPOSE OF TRANSACTION On March 12, 2010 the Reporting Person and the other Consenting Noteholders reached an agreement in principle with the Issuer Parties as to modifications to the Plan Support Agreement and the Plan. Pursuant to the modified Plan, the Noteholders would receive, in exchange for their Notes, new convertible preferred stock of the reorganized Issuer (the "Preferred Stock") and New Senior Secured Notes. The Preferred Stock, on an as-converted basis, would represent approximately 53.8% of the Issuer's post-consummation outstanding common shares. The Preferred Stock would have a 1x liquidation preference and be mandatorily redeemable after 8 years for cash or, if certain conditions are met, common shares of the reorganized Issuer. The holders of the Preferred Stock would vote on an as converted basis together with the holders of common shares. In addition, pursuant to the modified Plan, the aggregate principal amount of New Senior Secured Notes being issued to the Noteholders will be approximately $110,000,000, increased from $95,000,000. The modifications to the Plan will also include (i) increasing the recovery of existing equity holders of the Issuer from 18.6% of the Issuer's post-consummation outstanding common shares to 41.1%, which would be issued in common shares of the reorganized Issuer and (ii) issuing one series of three-year warrants to existing equity holders of the Issuer exercisable into a number of common shares equal to 10% of 110% of the Issuer's post-consummation outstanding common shares, with a strike price of $2.50, rather than two series of warrants each for 10% of 110% of the Issuer's post-consummation outstanding common shares, with a strike price of $1.10 and $2.00 respectively. The parties anticipate entering into a modified Plan Support Agreement, under which the Noteholders would agree to support the modifications to the Plan as summarized above. ---------------------------- ---------------------------- CUSIP No. 36229U102 SCHEDULE 13D/A Page 4 of 4 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 16, 2010 TENNENBAUM CAPITAL PARTNERS, LLC, A DELAWARE LIMITED LIABILITY COMPANY By: /s/ Elizabeth Greenwood ------------------------ Name: Elizabeth Greenwood Title: General Counsel & Chief Compliance Officer