![John Johnston](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
John Johnston
Director/Board Member at
MAXCYTE, INC.
Net worth: 207 104 $ as of 2026-05-30
Profile
Mr. John J.
Johnston is an Independent Non-Executive Director at MaxCyte, Inc. He is on the Board of Directors at MaxCyte, Inc. Mr. Johnston was previously employed as an Independent Non-Executive Chairman by Constellation Healthcare Technologies, Inc., an Independent Non-Executive Director by Midatech Pharma Plc, an Independent Non-Executive Director by Action Hotels Plc, a Non-Executive Chairman by Flowgroup Plc, a Head-Sales by Nomura Code Securities Ltd., a Non-Executive Director by Revera Asset Management Ltd., a Director-Small Companies Technology by Legg Mason, Inc., and a Head-Small Companies by Scottish Amicable Plc.
He also served on the board at Seymour Pierce Ltd. He received his undergraduate degree from the University of Abertay and an MBA from the University Of Dundee.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
MAXCYTE, INC. 0.16% | 2026-04-20 | 171,160 ( 0.16% ) | 207 104 $ | 2026-05-30 |
John Johnston active positions
| Companies | Position | Start |
|---|---|---|
| MAXCYTE, INC. | Director/Board Member | 2015-12-31 |
Former positions of John Johnston
| Companies | Position | End |
|---|---|---|
| BIODEXA PHARMACEUTICALS PLC | Director/Board Member | 2019-02-25 |
| ACTION HOTELS PLC | Director/Board Member | 2018-11-30 |
| FLOWGROUP PLC | Chairman | 2017-10-25 |
| CONSTELLATION HEALTHCARE TECH INC | Chairman | 2017-01-29 |
Nomura Code Securities Ltd.
 Nomura Code Securities Ltd. Investment ManagersFinance Provides advisory, fundraising, and broking services | Institutional Sales | 2013-02-28 |
Training of John Johnston
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
64
1st degree connections
12
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 12 |
|---|---|
Legg Mason, Inc.
 Legg Mason, Inc. Investment ManagersFinance Provides investment and asset management services | Finance |
MaxCyte, Inc.
 MaxCyte, Inc. BiotechnologyHealth Technology Specializes in cell modification technologies to enable the discovery, development, manufacturing, and delivery of therapeutic products | Health Technology |
Seymour Pierce Ltd.
 Seymour Pierce Ltd. Investment Banks/BrokersFinance Provides corporate brokerage and finance services | Finance |
Flowgroup Plc
 Flowgroup Plc Electric UtilitiesUtilities Focuses on the commercialization of intellectual property and technical product development of alternative energy products | Utilities |
Constellation Healthcare Technologies, Inc.
 Constellation Healthcare Technologies, Inc. Miscellaneous Commercial ServicesCommercial Services Provides holistic, integrated suite of practice management support services | Commercial Services |
Scottish Amicable Plc
 Scottish Amicable Plc Regional BanksFinance Provides financial and commercial services | Finance |
University Of Dundee
 University Of Dundee Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Revera Asset Management Ltd.
 Revera Asset Management Ltd. Investment ManagersFinance Revera is a fundamental investor that uses bottom-up analytical skills to identify businesses where the long-term value of future cash flows is not fully recognized by investors. The firm’s approach also takes account the strategic, operational, financial or macroeconomic risks attached to achieving their goals. They focus exclusively on UK equities, using their experience to build portfolios designed to offer attractive returns over the medium term. | Finance |
Nomura Code Securities Ltd.
Nomura Code Securities Ltd. Investment ManagersFinance Provides advisory, fundraising, and broking services | Finance |
University of Abertay
 University of Abertay Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Action Hotels Plc
 Action Hotels Plc Hotels/Resorts/Cruise linesConsumer Services Owns and operates hotels | Consumer Services |
Biodexa Pharmaceuticals Plc
 Biodexa Pharmaceuticals Plc Pharmaceuticals: MajorHealth Technology Designs and manufactures nanomedicines | Health Technology |
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