X0306 4 2019-11-15 0 0000933974 Brooks Automation, Inc. BRKS 0001247436 SCHWARTZ STEPHEN S C/O BROOKS AUTOMATION, INC. 15 ELIZABETH DRIVE CHELMSFORD MA 01824 1 1 0 0 CEO Common Stock 2019-11-15 4 A 0 215672 0.00 A 714871 D Common Stock 2019-11-20 4 S 0 100347 45.25 D 614524 D Common Stock 2019-11-20 4 S 0 8044 45.25 D 606480 D Common Stock 2019-11-21 4 S 0 3929 43.22 D 602551 D Represents shares issued upon the vesting of performance-based units granted on November 9, 2016, which were subject to performance-based vesting requirements measured at the three-year period ended September 30, 2019. No amount was paid by the reporting person upon grant or vesting of the performance-based units. Represents 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 15, 2019 of 215,672 performance-based units held by the reporting person. Represents the weighted average price for shares sold between November 18, 2019 and November 20, 2019 at a range between $44.34 and $46.58. The reporting person will provide to the Securities and Exchange Commission, the issuer and any stockholder, upon request, full information regarding the number of shares purchased or sold at each separate price. Represents 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 15, 2019 of 17,728 restricted stock units from two grants held by the reporting person and previously reported on Form 4. Represents 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 15, 2019 of 8,115 restricted stock units held by the reporting person and previously reported on Form 4. Represents the weighted average price for shares sold at a range between $43.10 and $43.69. The reporting person will provide to the Securities and Exchange Commission, the issuer and any stockholder, upon request, full information regarding the number of shares purchased or sold at each separate price. /s/ Jason W. Joseph, Attorney-in-fact for Stephen S. Schwartz 2019-11-22