X0306 4 2021-08-20 false 0001724570 DATTO HOLDING CORP. MSP 0001200680 SEVERANCE WILLIAM 101 MERRITT 7 NORWALK CT 06851 false true false false Chief Accounting Officer Restricted Stock Units 2021-08-20 4 A false 18900.00 0.00 A 18900.00 D Consists of restricted stock units, of which 25% will vest on June 30, 2022, and an additional 6.25% will vest quarterly thereafter so long as the Reporting Person continues to be employed as of each respective vesting date. /s/ Adam Collicelli, by Power of Attorney 2021-08-24