Novanta Inc. Watch

from 10-K 3 pages Description of Common Shares

from S-3ASR 53 pages Novanta Inc. Indenture Dated as of , 20___ Wilmington Trust, National Association Trustee

from 10-K 2 pages Description of Common Shares

from S-3ASR 52 pages Novanta Inc. Indenture Dated as of , 20___ Wilmington Trust, National Association Trustee

from 10-K 3 pages Indenture or similar

from S-3 50 pages Gsi Group Inc. Indenture Dated as of , 20 Wilmington Trust, National Association Trustee

from S-3 2 pages Indenture or similar

from S-3 49 pages Gsi Group Inc. Indenture Dated as of , 20 Wilmington Trust, National Association Trustee

from S-3 2 pages 5072080 Gsi Group Inc. Number 00100014zq Shares 11111 Incorporated Under the Business Corporations Act (New Brunswick) This Certifies That Specimen Certs Cusip 36191c205 Isin Ca36191c2058 Is the Registered Holder of * * * 1 * * * See Reverse for Certain Definitions Fully Paid and Non-Assessable Common Shares Without Par Value in the Capital of Gsi Group Inc. Transferable on the Books of the Corporation Only Upon Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Unless Countersigned by the Transfer Agent and Registrar of the Corporation. in Witness Whereof the Corporation Has Caused This Certificate to Be Signed on Its Behalf by the Facsimile Signatures of Its Duly Authorized Officers. Principal Financial Officer Vice President Countersigned and Registered Computershare Trust Company, N.A. (Golden) Transfer Agent and Registrar or Vice President by Authorized Officer Dated: Mar 14, 2012 Countersigned and Registered Computershare Investor Services Inc. (Toronto) Transfer Agent and Registrar by Authorized Officer the Shares Represented by This Certificate Are Transferable at the Offices of Computershare Investor Services Inc. in Toronto, on and Computershare Trust Company, N.A. in Golden, Co Security Instructions on Reverse Voir Les Instructions De Securite Au Verso CSAE_00164874_LSIQ.TOR.PULLS/000001/000001/I C8888889133 | T Printed by Data Business Forms

from 10-K 5 pages First Supplemental Indenture

from 8-K 27 pages Gsi Group Inc. Registration Rights Agreement

from 8-K 94 pages Gsi Group Corporation the Guarantors Named Herein and the Bank of New York Mellon Trust Company, N.A., as Trustee Indenture Dated as of July 23, 2010 12.25% Senior Secured Pik Election Notes Due 2014

from SC 13D/A 4 pages Via Facsimile and Electronic Mail William R. Baldiga, Esq. Brown Rudnick Llp One Financial Center Boston, Massachusetts 02111 Re: In Re Mes International, Inc., Et Al. Case No. 09-14109 Dear Mr. Baldiga

from S-8 ~10 pages Ex-4.1 Second Restatement of 1995 Equity Incentive Plan

from 10-Q 1 page Security Agreement

from 10-Q ~5 pages Waiver to Certain of the Operative Agreements

from 10-Q ~5 pages Security Agreement

from 10-K405 ~5 pages 1995 Stock Option Plan Restatement

from S-8 ~10 pages Employee Stock Purchase Plan

from S-8 ~5 pages 1995 Stock Option Plan