Key facts
- John Joseph Johnston has 1 issuer position tracked on this page.
- Estimated disclosed ownership value: $407,360.
- Recent insider filing activity is available below.
Insider Trading & Ownership of John Joseph Johnston
- Location
- Gaithersburg, MD
- Summary
- The estimated net worth of John Joseph Johnston is at least $407,360 dollars as of 23 Jun 2025. John Joseph Johnston is the Director of MAXCYTE, INC. and owns shares of MAXCYTE, INC. (MXCT) stock worth about $407.4K.
- Signature
- /s/ David Sandoval, Attorney-in-Fact
- All Insider Reports
- All Insider Reports
Follow Filing Activity
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Change
- Largest disclosed position: MAXCYTE, INC. ($407,360).
- Past-year value change for that position: .
Research use
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of John Joseph Johnston
MXCT
Forms 3/4/5
MAXCYTE, INC.
- Relationship
- Director
- Holdings value
- $407,360
- Past year net change
- Change %
- Report period
- 18 Jun 2025
Insider Transactions Reported by John Joseph Johnston:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.