SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

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                                  SCHEDULE TO/A
                                  (RULE 13E-4)
            TENDER OFFER STATEMENT UNDER SECTION 14(D)(1) OR 13(E)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                                (AMENDMENT NO. 1)

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                             BROOKS AUTOMATION, INC.
         (Name of Subject Company (Issuer) and Filing Person (Offeror))

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           OPTIONS TO PURCHASE COMMON STOCK, PAR VALUE $0.01 PER SHARE
                         (Title of Class of Securities)

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                                   114340 10 2
                      (CUSIP Number of Class of Securities)
                            (Underlying Common Stock)

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                               ROBERT J. THERRIEN
                             CHIEF EXECUTIVE OFFICER
                             BROOKS AUTOMATION, INC.
                               15 ELIZABETH DRIVE
                              CHEMLSFORD, MA 01824
                                 (978) 262-2400

   (Name, address and telephone number of person authorized to receive notices
                 and communications on behalf of filing person)

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                                   COPIES TO:

                             LAWRENCE M. LEVY, ESQ.
                        BROWN RUDNICK BERLACK ISRAELS LLP
                              ONE FINANCIAL CENTER
                                BOSTON, MA 02111
                                 (617) 856-8200

                            CALCULATION OF FILING FEE



        TRANSACTION VALUATION*                   AMOUNT OF FILING FEE**
        ----------------------                   ----------------------
                                              
              $22,387,500                               $1,811.15


*
         Calculated solely for purposes of determining the filing fee. This
         amount assumes that options to purchase 6,375,954 shares of common
         stock of Brooks Automation, Inc. having an aggregate value of
         $22,387,500 as of January 29, 2003 will be exchanged and/or cancelled
         pursuant to this offer. The aggregate value of such options was
         calculated based on the Black-Scholes option pricing model. The amount
         of the filing fee, calculated in accordance with Rule 0-11(b) of the
         Securities Exchange Act of 1934, as amended, equals $80.90 per each $1
         million of the value of the transaction.

**
         Previously paid.

[ ] Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
and identify the filing with which the offsetting fee was previously paid.
Identify the previous filing by registration statement number, or the Form or
Schedule and the date of its filing.

                       Amount Previously Paid: $1,811.15.
                     Form or Registration No.: Schedule TO.
                     Filing party: Brooks Automation, Inc..
                           Date filed: March 13, 2003.

[ ]  Check box if the filing relates solely to preliminary communications made
before the commencement of a tender offer.

[ ]Check the appropriate boxes below to designate any transactions to which the
statement relates:

                   [ ] third party tender offer subject to Rule 14d-1.
                   [x] issuer tender offer subject to Rule 13e-4.
                   [ ] going-private transaction subject to Rule 13e-3.
                   [ ] amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer. [ ]

         This Amendment No. 1 amends and supplements the Tender Offer Statement
on Schedule TO filed by Brooks Automation, Inc. ("Brooks") with the Securities
and Exchange Commission on March 13, 2002, relating to Brooks' offer to exchange
certain outstanding options to purchase shares of Brooks' common stock held by
eligible employees for new options to purchase shares of Brooks' common stock.

         This Amendment No. 1 accomplishes the following:


         1. Item 12(d)(3) to Brooks' Schedule TO is amended by the filing of a
corrected version of the Brooks Automation, Inc. 1998 Employee Equity Incentive
Plan (the "Brooks 1998 Plan"). The version previously

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filed had inadvertently failed to include certain changes made to Section 5 on
February 26, 2003 to coordinate the Brooks 1998 Plan with the option exchange
program.

         2. There is being filed herewith as Item 12(d)(5) a reminder notice to
employees distributed via email on March 21, 2003.


         All of the terms of the Offer to Exchange remain unchanged.

ITEM 12. EXHIBITS.
         (a)

         (1)*     Offer to Exchange, dated March 13, 2003.

         (2)*     Memorandum from Robert J. Therrien, Chief Executive Officer of
                  the Company, dated March 13, 2003.

         (3)*     Frequently Asked Questions.

         (4)*     Election Form.

         (5)*     Notice to Withdraw from the Offer.

         (6)*     Brooks Automation, Inc. Annual Report on Form 10-K for its
                  fiscal year ended September 30, 2002, filed with the
                  Securities and Exchange Commission on December 30, 2002 and
                  incorporated herein by reference.

         (7)*     Brooks Automation, Inc. Quarterly Report on Form 10-Q for its
                  quarter ended December 31, 2002, filed with the Securities and
                  Exchange Commission on February 14, 2003 and incorporated
                  herein by reference.

         (b)      Not applicable.

         (c)      Not applicable.

         (d)
         (1)*     Stockholder Agreement dated September 30, 1999 by and among
                  the Company, Jenoptik AG, M&W Zander Holding GmbH and Robert
                  J. Therrien relating to the acquisition of substantially all
                  of the assets of the Infab Division of Jenoptik AG by the
                  Company, incorporated herein by reference to the Company's
                  current report on Form 8-K filed with the Securities Exchange
                  Commission on October 15, 1999.

         (2)*     Transitional Services Agreement dated September 30, 1999
                  between the Company and Jenoptik AG relating to the Company's
                  German manufacturing facility, incorporated herein by
                  reference to Exhibit 10.33 of the Company's Annual Report on
                  Form 10-K filed with the Securities Exchange Commission on
                  December 29, 1999 for the fiscal year ended September 30,
                  1999.

         (3)      Brooks Automation, Inc. 1998 Employee Equity Incentive Plan.

         (4)*     Brooks Automation, Inc. 2000 Combination Stock Option Plan.

         (5)      Reminder Notice to Employees.

         (e)      Not applicable.

         (f)      Not applicable.

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         (g)      Not applicable.

         (h)      Not applicable.



* Previously filed as an exhibit to the Schedule TO filed by Brooks Automation,
Inc. on March 13, 2003.

                                    SIGNATURE

         After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this Amendment to the Schedule TO is true,
complete and correct.

                                            BROOKS AUTOMATION, INC.

                                            /s/ Lynda M. Avallone
                                            -----------------------------------
                                            Lynda M. Avallone
                                            Vice President, Corporate Treasurer

Date: March 21, 2003


                                INDEX TO EXHIBITS



EXHIBIT
NUMBER                   DESCRIPTION
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(a)(1)*        Offer to Exchange, dated March 13, 2003.

(a)(2) *       Memorandum from Robert J. Therrien, Chief Executive Officer of
               the Company, dated March 13, 2003.

(a)(3)*        Frequently Asked Questions.

(a)(4)*        Election Form.

(a)(5)*        Notice to Withdraw from the Offer.

(a)(6)*        Brooks Automation, Inc. Annual Report on Form 10-K for its fiscal
               year ended September 30, 2002, filed with the Securities and
               Exchange Commission on December 30, 2002 and incorporated herein
               by reference.

(a)(7) *       Brooks Automation, Inc. Quarterly Report on Form 10-Q for its
               quarter ended December 31, 2002, filed with the Securities and
               Exchange Commission on February 14, 2003 and incorporated herein
               by reference.

(d)(1)*        Stockholder Agreement dated September 30, 1999 by and among the
               Company, Jenoptik AG, M&W Zander Holding GmbH and Robert J.
               Therrien relating to the acquisition of substantially all of the
               assets of the Infab Division of Jenoptik AG by the Company,
               incorporated herein by reference to the Company's current report
               on Form 8-K filed with the Securities Exchange Commission on
               October


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               15, 1999.

(d)(2)*        Transitional Services Agreement dated September 30, 1999 between
               the Company and Jenoptik AG relating to the Company's German
               manufacturing facility, incorporated herein by reference to
               Exhibit 10.33 of the Company's Annual Report on Form 10-K filed
               with the Securities Exchange Commission on December 29, 1999 for
               the fiscal year ended September 30, 1999.

(d)(3)         Brooks Automation, Inc. 1998 Employee Equity Incentive Plan.

(d)(4)*        Brooks Automation, Inc. 2000 Combination Stock Option Plan.

(d)(5)         Reminder Notice to Employees.




* Previously filed as an exhibit to the Schedule TO filed by Brooks Automation,
Inc. on March 13, 2003.

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