X0206 3 2023-03-27 1 0001287098 MAXCYTE, INC. MXCT 0001375884 Swirsky Douglas J C/O MAXCYTE, INC. 9713 KEY WEST AVENUE, SUITE 400 ROCKVILLE MD 20850 0 1 0 0 Chief Financial Officer No securities beneficially owned. Exhibit List - Exhibit 24 - Power of Attorney /s/ Brian F. Leaf, Attorney-in-Fact 2023-03-28