John Joseph Johnston has sold MXCT and made no open-market buys since Jun 2023

John Joseph Johnston is a non-employee director of MaxCyte, Inc. (NASDAQ: MXCT) and a reporting corporate insider under U.S. securities regulations.( As a director, he participates in the governance and strategic oversight of MaxCyte, a company focused on cell-engineering technologies, and holds his board role from the company’s Maryland offices, where his SEC-reported business and mailing addresses are listed c/o MaxCyte in Rockville and Gaithersburg, MD.( His insider holdings and transactions are disclosed through Form 4 and related SEC filings, reflecting his status as a key member of MaxCyte’s leadership framework alongside other senior executives.(

Johnston’s recent activity as a corporate insider includes multiple equity-based compensation grants and share transactions in MaxCyte common stock.( In June 2026, he received 30,421 restricted stock units and a stock option for 49,579 shares at an exercise price of $1.13 per share, vesting in June 2027 subject to his continued service as a non-employee director.( As of early 2025, he had executed a series of Form 4-reported trades totaling 17 transactions over five years, all classified as sales, including the sale of 3,000 shares on January 27, 2025 under a pre-arranged plan, and held over 140,000 shares with an estimated equity value in the low six figures.( Detailed biographical information on his broader career history and formal education is not disclosed in the available public filings, which focus primarily on his role and activity as a MaxCyte director and reporting person.

Written by Perplexity from public sources.