8-K

UNITED STATES
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):  September 22, 2005

GSI GROUP INC.

(Exact name of registrant as specified in its charter)

New Brunswick, Canada

(State or other jurisdiction of incorporation)

000-25705	98-0110412
(Commission File Number)	(I.R.S. Employer Identification No.)

39 Manning Road, Billerica, Massachusetts 01821

(Address of principal executive offices, including zip code)

(978) 439-5511

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o     Written communications pursuant to Rule 425 under the Securities Act (17 CFR 220.425)

o     Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o     Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o     Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

TABLE OF CONTENTS

	ITEM 7.01. REGULATION FD DISCLOSURE.
	ITEM 9.01. FINANCIAL STATEMENTS AND EXHIBITS.
SIGNATURE
EXHIBIT INDEX
EX-99.1 SELECTED SLIDES FROM PRESENTATION 9/22/05

ITEM 7.01.    REGULATION FD DISCLOSURE.

     On September 22, 2005, officers and management of GSI Group Inc. (“the Company”) will deliver to selected analysts a series of presentations that will include written communication (comprised of a slideshow) which will be disseminated and provided in both written and oral form to the participants. The content of the slideshow presentation consists of both information that has already been made available publicly, as well as additional information. Certain material information presented in the slideshow is described and furnished as Exhibit 99.1 to this Report on Form 8-K pursuant to Regulation FD and incorporated herein by reference.

ITEM 9.01.    FINANCIAL STATEMENTS AND EXHIBITS.

(a)	Financial Statements of Businesses Acquired.
	Not required.
(b)	Pro Forma Financial Information.
	Not required.
(c)	Exhibits.

99.1    Selected Slides from Presentation (written communication comprised of a certain slides to be shown during a
           series of analysts presentations beginning on September 22, 2005, and furnished pursuant to Item 7.01 of this
           Report on Form 8-K). A complete copy of the presentation is available from the Company upon request.

SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	GSI GROUP INC. (Registrant)
Date:  September 22, 2005	By:	/s/ Thomas R. Swain
		Thomas R. Swain
		Vice President, Finance and Chief Financial Officer

EXHIBIT INDEX

Exhibit No.	Description
99.1	Selected Slides from Presentation (written communication comprised of a certain slides to be shown during a series of analysts presentations beginning on September 22, 2005, and furnished pursuant to Item 7.01 of this Report on Form 8-K). A complete copy of the presentation is available from the Company upon request.

EX-99.1

Exhibit 99.1

(c) Copyright 2005, GSI Group Company Confidential Achieving GSI's Target Model Financial Overview Charles Winston CEO GSI Group

GSI Today GSI Group Key Disclosure Data Stats Sheet (US $000's) Revenue Q1 Q2 Q3 Q4 Fiscal Yr Q1 Q2 Revenue 74,853 $ 84,537 $ 90,671 $ 79,951 $ 330,012 $ 64,841 $ $ 66,850 COGS 45,113 49,019 53,573 48,868 196,573 41,893 39,168 Gross Margin 40% 42% 41% 39% 40% 35% 41% R&D expenses 4,759 6,002 6,562 6,652 23,975 6,460 6,368 % of revenues 6% 7% 7% 8% 7% 10% 10% SG&A expenses 13,484 14,527 15,627 13,617 57,256 15,380 15,098 % of revenues 18% 17% 17% 17% 17% 24% 23% Operating income 9,948 13,295 8,654 45,294 (841) 4,564 % of revenues 13% 16% 15% 11% 14% - -1% 7% Net Income 8,939 11,814 12,123 8,595 41,471 110 3,125 EPS 0.21 $ 0.28 $ 0.29 $ 0.21 $ 0.98 $ - - $ 0.07 $ Precision Motion Revenues 33,357 $ 41,854 $ 42,060 $ 35,456 $ 152,726 $ 33,985 $ 34,151 $ Operating income 5,093 8,385 5,687 3,870 23,035 3,297 4,872 Gross Margins 34% 40% 37% 35% 37% 37% 42% Systems Revenues 34,439 $ 36,720 $ 41,217 $ 35,786 $ 148,161 $ 22,004 $ 23,711 $ Operating income 9,693 9,950 11,913 9,289 40,846 1,623 3,146 Gross Margins 45% 43% 44% 43% 44% 35% 39% Laser Revenues 11,566 $ 11,677 $ 11, 648 $ 11,801 $ 46,692 $ 10,261 $ 11,426 $ Operating income 204 496 530 287 1,517 (711) 803 Gross Margins 28% 31% 31% 30% 30% 25% 36% 2004 2005

Actuals vs. Target Q2 '04 Q2 '05 Target Revenue $85M $67M $80M Gross Margins 42% 41% 45% R&D 7% 10% 9% SG&A 17% 23% 17% Op. Income 16% 7% 17%

Divisional Margin Progress GSI Group Key Disclosure Data Stats Sheet (US $000's) Revenue Q1 Q2 Q3 Q4 Fiscal Yr Q1 Q2 Revenue 74,853 $ 84,537 $ 90,671 $ 79,951 $ 330,012 $ 64,841 $ 66,850 COGS 45,113 49,019 53,573 48,868 196,573 41,893 39,168 Gross Margin 40% 42% 41% 39% 40% 35% 41% R&D expenses 4,759 6,002 6,562 6,652 23,975 6,460 6,368 % of revenues 6% 7% 7% 8% 7% 10% 10% SG&A expenses 13,484 14,527 15,627 13,617 57,256 15,380 15,098 % of revenues 18% 17% 17% 17% 17% 24% 23% Operating income 9,948 13,295 8,654 45,294 (841) 4,564 % of revenues 13% 16% 15% 11% 14% - -1% 7% Net Income 8,939 11,814 12,123 8,595 41,471 110 3,125 EPS 0.21 $ 0.28 $ 0.29 $ 0.21 $ 0.98 $ - - $ 0.07 $ Precision Motion Revenues 33,357 $ 41,854 $ 42,060 $ 35,456 $ 152,726 $ 33,985 $ 34,151 $ Operating income 5,093 8,385 5,687 3,870 23,035 3,297 4,872 Gross Margins 34% 40% 37% 35% 37% 37% 42% Systems Revenues 34,439 $ 36,720 $ 41,217 $ 35,786 $ 148,161 $ 22,004 $ 23,711 $ Operating income 9,693 9,950 11,913 9,289 40,846 1,623 3,146 Gross Margins 45% 43% 44% 43% 44% 35% 39% Laser Revenues 11,566 $ 11,677 $ 11, 648 $ 11,801 $ 46,692 $ 10,261 $ 11,426 $ Operating income 204 496 530 287 1,517 (711) 803 Gross Margins 28% 31% 31% 30% 30% 25% 36% 2004 2005 13,397

Revenue Towards Targeted Model Semi Cycle Recovery Semi Market Share Gain Precision Motion Organic Growth Acquisition $67M/Q $80M/Q = $13m

Revenue Trends Laser Systems - Highly Cyclical 2003 2004 2005* $83M $147M $91M Precision Motion - Limited Cyclicality Not Closely Correlated to Semiconductor PCB Data Storage 2004 2005* $153M $136M *first half annualized

Gross Margin Improvements Volume Increases - Systems Driver Reduced Product Costs China (part sourcing & part manufacturing) Outsourcing sub-assemblies New product development that target higher margins Product re-design for cost reduction