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): May 11, 2005

GSI LUMONICS 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))

ITEM 7.01. REGULATION FD DISCLOSURE.

     On May 11, 2005, GSI Lumonics Inc. (the Company) posted to the “Investor News” section of its Internet website (accessible at http://www.gsilumonics.com/investors/) an updated investor presentation (slideshow) in Microsoft® PowerPoint® format. Additionally, beginning on May 11, 2005 officers of the Company will deliver to selected investors and analysts a series of presentations that will include written communication (comprised of this slideshow) which will be disseminated and provided in both written and oral form to the participants. The content of 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   Investor Presentation (written communication comprised of a slideshow posted to the Registrant’s Internet website and to be shown during a series of investor and analysts presentations beginning on May 11, 2005, and furnished pursuant to Item 7.01 of this Report on Form 8-K).

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 LUMONICS INC. (Registrant)
Date: May 11, 2005	By:	/s/ Thomas R. Swain
		Thomas R. Swain
		Vice President, Finance and Chief Financial Officer

EXHIBIT INDEX

Exhibit No.	Description
99.1	Investor Presentation (written communication comprised of a slideshow posted to the Registrant’s Internet website and to be shown during a series of investor and analyst presentations beginning on May 11, 2005, and furnished pursuant to Item 7.01 of this Report on Form 8-K).

EX-99.1

Safe Harbor Certain statements in this presentation may constitute forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995, Section 27A of the United States Securities Act of 1933 and Section 21E of the United States Securities Exchange Act of 1934. These forward-looking statements may relate to anticipated financial performance, management's plans and objectives for future operations, business prospects, outcome of regulatory proceedings, market conditions, tax issues and other matters. All statements contained in this news release that do not relate to matters of historical fact should be considered forward-looking statements, and are generally identified by words such as "anticipate," "believe," "estimate," "expect," "intend," "plan," "objective" and other similar expressions. Readers should not place undue reliance on the forward-looking statements contained in this news release. Such statements are based on management's beliefs and assumptions and on information currently available to management and are subject to risks, uncertainties and changes in condition, significance, value and effect. Other risks include the fact that the Company's sales have been and are expected to continue to be dependent upon customer capital equipment expenditures, which are, in turn, affected by business cycles in the markets served by those customers. Other factors include volatility in the semiconductor industry, the risk of order delays and cancellations, the risk of delays by customers in introducing their new products and market acceptance of products incorporating subsystems supplied by the Company, similar risks to the Company of delays in its new products, our ability to continue to reduce costs and capital expenditures, our ability to focus R&D investment and integrate acquisitions and other risks detailed in reports and documents filed by the Company with the United States Securities and Exchange Commission and with securities regulatory authorities in Canada. Such risks, uncertainties and changes in condition, significance, value and effect, many of which are beyond the Company's control, could cause the Company's actual results and other future events to differ materially from those anticipated. The Company does not, however, assume any obligation to update these forward-looking statements to reflect actual results, changes in assumptions or changes in other factors affecting such forward-looking statements.

Business Segments % of Revenue Q1 2005* *Includes 2.2% intra-company sales.

Market Segments % of Revenue Q1 2005

Global Sales % of Revenue Q1 2005* * bill to address

Major Customers - Q1 Major Customers - Q1

Enabling technologies Niche markets Acquisitions

Enabling Niche Markets Position Control Motion Control Scan Motion Rotary Motion Optics Lasers Systems Electronic Test & measure Robotics Vision systems Hard disk writing PCB drilling Component place PCB circuits Inspection PCB drill/route Hard disc write Battery weld Sensor weld PCB mark Circuits PCB inspection Medical Robotic surgery DNA testing Cancer screen Lab automation Analytic instruments Ophthalmology Medical imaging Defibrillator weld Device mark Pill mark Semiconductor Wire bond Wafer handle Cassette load Wafer fabrication Wafer dice Test & repair Wafer mark Inspection Ion implantation Wafer dice Wafer grind Super-fine flats Optical coating Wafer mark Package mark Wafer dice Memory yield Mixed signal fab Wafer mark Other Microscopy Printing Surveillance Navigation Scientific Printing Detection Scientific Printing Laser gyroscope Diamond processing Aerospace Scientific Industrial Coordinate measure Position monitor Factory automation Machine control Process control Marking Inspection Coating Machining Precision coatings Fuel injector weld Textile cut/mark Plastics cut/mark

Rotary Motion Data storage PCB drilling Industrial Market Synergies Motion control Data storage PCB Drilling Industrial

Acquisitions Complementary Cash Completed: DRC ($3M) Spectron ($6M) Westwind ($35M) MicroE ($55M) Accretive

Segment Revenues & Profits Revenues (US$ Millions) Profits* (US$ Millions) * Profit by segment is before taxes. We do not breakout non-operating items to the segment level.

Revenue Growth Revenue Growth (in a 12 month period, Q2'04 - Q1'05 vs. Q2'03 - Q1'04) As a % of revenues Organic $32M 14.4% Acquired* $69M 31.5% Total Revenue Growth $101M 45.9% * Product lines acquired since 1/1/2003.

Bookings & Backlog (US$ Millions) Bookings* Backlog** * This includes Westwind in Q4 '03 and MicroE in Q2 '04. * * This includes MicroE

2004 Estimates Units Sold 60 million 600 million 24 million 68 million 7 million 2005 Projection 79 million 650 million 32 million 68 million 14 million Laptops Mobile phones PDA's Digital cameras Flat panel displays Market Drivers* * Data from Industry Analysts.

The DRAM Players in 2004... Market Share 31% 16% 15% 14% 6% 5% 4% 4% 5% $B 8.34 4.24 4.09 3.85 1.53 1.23 1.17 1.16 1.3 Samsung Micron Hynix Infineon Elpida PSC ProMos Macronix Nanya, Inotera, SMIC, Etc. Source of Data: IC Insights, April 05 95% $25.6 B

Cash Flow & Gross Margin Cash Flow* (US Millions) Gross Margins * These cash flows are from operations, not overall company cash flows.

Selected Balance Sheet* Cash & Investments $87.3 Total Assets $374.1 NBV $303.2 Debt free *All values in $US millions as of April 1, 2005

Targeted Business Model* Q1 2005 Target Revenues Gross margin Engineering SG & A expenses Amortization Other Operating profit 100 % 100 % 35.4 % 45 % 10.0 % 9 % 23.7 % 17 % 2.7 % 2 % (1.3) % 17 % 0.3 % 0 % *Targeted business model is based on revenues of $320 million.

GSI LUMONICS- Summary Enabling technologies Niche markets Acquisitions Strong balance sheet Cash flow