X0206 3 2020-10-20 0 0001724570 DATTO HOLDING CORP. MSP 0001163402 DILLON ADRIAN T 101 MERRITT 7 NORWALK CT 06851 1 0 0 0 Common Stock 11719 D Consists of restricted stock units which were granted on August 11, 2020 and vest 100% on the first anniversary of the grant date subject to continued service through the vesting date. Exhibit 24 - Power of Attorney /s/ Adam Collicelli, by Power of Attorney 2020-10-20