0001972481-24-000045.txt : 20240226 0001972481-24-000045.hdr.sgml : 20240226 20240226162219 ACCESSION NUMBER: 0001972481-24-000045 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20240226 DATE AS OF CHANGE: 20240226 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: MAXCYTE, INC. CENTRAL INDEX KEY: 0001287098 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731] ORGANIZATION NAME: 08 Industrial Applications and Services IRS NUMBER: 522210438 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-40674 FILM NUMBER: 24679192 BUSINESS ADDRESS: STREET 1: 9713 KEY WEST AVENUE, STREET 2: SUITE 400 CITY: ROCKVILLE STATE: MD ZIP: 20850 BUSINESS PHONE: 301-517-5556 MAIL ADDRESS: STREET 1: 9713 KEY WEST AVENUE, STREET 2: SUITE 400 CITY: ROCKVILLE STATE: MD ZIP: 20850 FORMER COMPANY: FORMER CONFORMED NAME: MAXCYTE INC DATE OF NAME CHANGE: 20040415 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Johnston John Joseph CENTRAL INDEX KEY: 0001874850 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: C/O MAXCYTE, INC. STREET 2: 22 FIRSTFIELD ROAD, SUITE 110 CITY: GAITHERSBURG STATE: MD ZIP: 20878 144 1 primary_doc.xml 144 0001874850 XXXXXXXX LIVE 0001287098 MAXCYTE, INC. 001-40674 9713 KEY WEST AVENUE, SUITE 400 ROCKVILLE MD 20850 301-517-5556 Johnston John Joseph Affiliate Common Stifel Nicolaus & Company Inc.

501 N. Broadway St. Louis MO 63102

10000 45900.00 103576429 02/26/2024 NASDAQ Common 06/13/2016 option exercise Issuer N 5000 02/26/2024 Cash Common 07/01/2017 option exercise Issuer N 5000 06/26/2023 Cash N Johnston John Joseph

9713 KEY WEST AVENUE SUITE 400 ROCKVILLE MD 20850

Common 11/27/2023 5000 22959.00 Johnston John Joseph

9713 KEY WEST AVENUE SUITE 400 ROCKVILLE, MD 20850

Common 12/26/2023 5000 22663.00 Johnston John Joseph

9713 KEY WEST AVENUE SUITE 400 ROCKVILLE, MD 20850

Common 01/26/2024 5000 25582.00 02/26/2024 03/28/2023 /s/ Dominick Iadicicco is a duly authorized representative of STIFEL, as attorney-in-fact for John Joseph Johnston