X0306 4 2018-11-05 0 0000933974 BROOKS AUTOMATION INC BRKS 0001525267 Robertson Lindon G C/O BROOKS AUTOMATION, INC. 15 ELIZABETH DRIVE CHELMSFORD MA 01824 0 1 0 0 EVP & Chief Financial Officer Common Stock 2018-11-05 4 S 0 1796 31.76 D 134846 D Common Stock 2018-11-06 4 A 0 37747 0.00 A 172593 D The sale of shares by the reporting person to satisfy the reporting person's obligations with respect to withholding taxes in connection with the vesting on November 4, 2018 of 5,834 restricted stock units held by the reporting person. An initial grant of 70,000 restricted stock units (RSUs) was received on November 4, 2015 and reported on Form 4 dated November 6, 2015. The grant contained 52,500 performance-based units subject to performance-based vesting requirements, measured at the three-year period ended September 30, 2018, resulting in the achievement of 171.9%, or 90,247 of the performance-based units. This transaction represents a grant of an additional 37,747 RSUs. No amount was paid upon grant of RSUs. /s/ Jason W. Joseph, Attorney-in-fact for Lindon G. Robertson 2018-11-07