X0206 3 2021-07-29 0 0001287098 MAXCYTE, INC. MXCT 0001650691 Al-Wakeel Yasir B. C/O MAXCYTE, INC. 22 FIRSTFIELD ROAD, SUITE 110 GAITHERSBURG MD 20878 1 0 0 0 Stock Option (right to buy) 12.26 2031-06-14 Common Stock 80700 D One-third (1/3rd) of the shares underlying this option shall vest on June 14, 2022, and the remainder vested or shall vest in twenty-four (24) equal monthly installments thereafter, subject to the Reporting Person's continued service to the Issuer through each vesting date. This exercise price is in US Dollars and reflects the conversion of GBP to USD at an exchange rate of GBP 1.00 to $1.3749 as of July 23, 2021. Exhibit List - Exhibit 24 - Power of Attorney /s/ Jason Minio, Attorney-in-Fact 2021-07-29