Please pay attention to the following note in the Form 4, it's a totally different thing, happens all the time for Taxes.It's an automated thing, not an actual sale:
Explanation of Responses: (1) Represents shares withheld to satisfy tax withholding obligation upon vesting of time-based restricted stock units granted under the Company's 2018 Long-Term Incentive Plan as required by the Issuer. These shares were not sold by the reporting person in the open market.
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