#1 The earliest transaction date was November 27, 2023, and the due date for filing this Form 4 therefore was November 29. Late filing of this Form 4 was inadvertent.

#2 The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 22, 2023.

#3 Reflects average weighted purchase price. Actual purchase prices ranged from $28.68 to $29.29 per share. The reporting person undertakes to provide, upon the request of the SEC staff, the issuer or any security holder of the issuer, full information regarding the number of shares purchased at each separate price.

#1 Represents securities surrendered to Veeco to satisfy tax withholding obligations due upon the vesting of restricted stock.

#2 On March 12, 2021, the reporting person was granted the contingent right to receive 22,750 performance-based restricted stock units ("PRSUs"). This contingent right was subject to the reporting person's continued service with the Company and the achievement of three-year performance criteria, which was based on the Company's total shareholder return relative to other companies in the Russell 2000 as specified in the award agreement (the "Criteria"). Each PRSU represented the contingent right to receive one share of Veeco common stock. The award, if earned, could range from 50% to 200% of the granted PRSUs based on the achievement of the Criteria. The common stock award reflected in this filing represents achievement at the 200% level, which was realized.

#1 Represents securities surrendered to Veeco to satisfy tax withholding obligations due upon the vesting of restricted stock.

#2 On March 12, 2021, the reporting person was granted the contingent right to receive 22,750 performance-based restricted stock units ("PRSUs"). This contingent right was subject to the reporting person's continued service with the Company and the achievement of three-year performance criteria, which was based on the Company's total shareholder return relative to other companies in the Russell 2000 as specified in the award agreement (the "Criteria"). Each PRSU represented the contingent right to receive one share of Veeco common stock. The award, if earned, could range from 50% to 200% of the granted PRSUs based on the achievement of the Criteria. The common stock award reflected in this filing represents achievement at the 200% level, which was realized.