Filed by Brooks Automation, Inc.
Pursuant to Rule 425 under the Securities Act of
1933, and deemed filed pursuant to Rule 14a-12
under the Securities Exchange Act of 1934.

Subject Company: PRI Automation, Inc.
Commission File Number: 0-24934

This filing relates to a planned merger between Brooks Automation, Inc. (“Brooks” or “Brooks Automation”) and PRI Automation, Inc. (“PRI” or “PRI Automation”) and Pontiac Acquisition Corp., pursuant to an Agreement and Plan of Merger, dated as of October 23, 2001 (the “Merger Agreement”). The Merger Agreement is on file with the Securities and Exchange Commission as an exhibit to the Current Report on Form 8-K, filed by Brooks Automation, Inc. on October 26, 2001, and is incorporated by reference into this filing.

Pursuant to Rule 165 under the Securities Act of 1933 and Rule 14a-12 under the Securities Exchange Act of 1934, the following communication regarding the proposed transaction between Brooks Automation, Inc. and PRI Automation, Inc. is filed:

SLIDE PRESENTATION REGARDING THE MERGER
OF BROOKS AUTOMATION, INC. AND PRI AUTOMATION, INC.

This filing is made to change the contact person at Brooks' Investor Relations Department provided in the previous filing of this slide presentation on November 9, 2001.

SAFE HARBOR STATEMENT

The following discussion contains forward-looking statements related to the anticipated benefits, operational efficiencies and future financial results of the merger of Brooks Automation and PRI Automation. Brooks Automation and PRI Automation cannot guarantee that the merger will be completed due to the risks and uncertainties relating to their ability to secure necessary regulatory and shareholder review and approval and to satisfy the other conditions to the closing of the merger. Even if the merger is completed, the forward-looking statements involve additional known and unknown risks and uncertainties including, without limitation, risks relating to the ability of the companies to integrate in a cost effective, timely manner without material loss of employees or customers, the companies' dependence on the cyclical semiconductor industry, the companies' dependence on relatively few customers for a significant portion of its revenues, the companies' reliance on sales to OEM customers and the lengthy sales cycles of those customers, the companies' ability to continue to successfully develop and market new products and product enhancements on a timely basis, the highly competitive nature and rapid technological change that characterize the industries in which the companies compete, the risk of recently initiated securities class action litigation against PRI Automation being settled on an unfavorable basis to the combined company, and other risks and uncertainties described in the companies' reports and registration statements filed with the Securities and Exchange Commission. As a result, there can be no assurance that the combined or individual companies' future performance will not be materially different than projected. The companies also operate in an industry sector where securities' values are highly volatile and may be influenced by economic and other factors beyond the companies' control. The forward-looking statements contained herein speak only of the companies' expectations as of the date of this filing. The companies expressly disclaim any obligation or undertaking to release publicly any updates or revisions to any such statement to reflect any change in the companies' expectations or any change in events, conditions or circumstances on which any such statement is based.

RULE 425 STATEMENT

Brooks will file a Registration Statement on SEC Form S-4 and Brooks and PRI will file a Joint Proxy Statement/Prospectus with the SEC in connection with the merger, and that Brooks and PRI will mail a Joint Proxy Statement/Prospectus to the stockholders of Brooks and PRI containing information about the merger. Investors and security holders are urged to read the Registration Statement and the Joint Proxy Statement/Prospectus carefully when they become available. The Registration Statement and the Joint Proxy Statement/Prospectus will contain important information about Brooks, PRI, the merger, the persons soliciting the proxies relating

to the merger, their interests in the transaction and related matters. Investors and security holders will be able to obtain free copies of these documents through the website maintained by the SEC at http://www.sec.gov. Free copies of these documents may also be obtained by contacting each of the companies’ Investor Relations Departments as follows:

For Brooks Automation:	For PRI Automation:
Mark Chung	Michelle Goodall Faulkner
Director of Investor Relations	Director of Corporate Communications
978-262-2459	978-670-4270 ext. 3161
mark.chung@brooks.com	mfaulkner@pria.com

ADDITIONAL INFORMATION

         Brooks and its executive officers and directors may be deemed to be participants in the solicitation of proxies from the stockholders of Brooks with respect to the transactions contemplated by the merger agreement. Information regarding such officers and directors is included in Brooks’ proxy statement for its 2001 Annual Meeting of Stockholders filed with the SEC on January 24, 2001. This document is available free of charge at the SEC’s website indicated above and from Brooks by contacting its Investor Relations Department as indicated above.

         PRI and its executive officers and directors may be deemed to be participants in the solicitation of proxies from shareholders of PRI with respect to the transactions contemplated by the merger agreement. Information regarding such officers and directors is included in PRI’s proxy statement for its 2001 Annual Meeting of Shareholders filed with the SEC on February 20, 2001. This document is available free of charge at the SEC’s website indicated above and from PRI by contacting its Investor Relations Department as indicated above.

         In addition to the foregoing, additional information filed by either company is available at the SEC’s public reference rooms at 450 Fifth Street, N.W., Washington, D.C. 20549 or at the SEC’s other public reference rooms in New York, New York and Chicago, Illinois. Please call the SEC at 1-800-SEC-0330 for further information on the public reference rooms.