May 21, 2004 — Brooks Automation (Canada), Inc. has announced that it has given notice to holders of its exchangeable shares that it has established a date for the automatic redemption of all of the outstanding Brooks Canada exchangeable shares (other than those held by Brooks Automation, Inc. or any of its subsidiaries).

Brooks Canada has further advised the holders of exchangeable shares that 1325949 Ontario Inc. (a subsidiary of Brooks US) has notified Brooks Canada of its intention to exercise its redemption call right and purchase all of such exchangeable shares on their automatic redemption date.

Holders of the Brooks Canada exchangeable shares (other than Brooks US and its subsidiaries) will receive 0.52 shares of the common stock of Brooks US, a Delaware corporation, for each exchangeable share of Brooks Canada held. The effective date of the purchase will be July 23, 2004, after which the rights of each holder of exchangeable shares (other than Brooks US and its subsidiaries) will be limited to receiving the applicable consideration upon presentation and surrender of the certificate representing the holder’s exchangeable shares.

Upon the completion of this purchase, the listing of the Brooks Canada exchangeable shares on the Toronto Stock Exchange will be terminated.