Filer Snapshot

John Joseph Johnston

CIK 0001874850. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

29

Latest Filing

23 Jun 2025

Industry

n/a

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  • Open 13F if you want portfolio holdings.
  • Open 13D/G or insider pages only when this CIK has those rows.
Open reporting owner context
Source: SEC Forms 3/4/5

4 filed on 23 Jun 2025 for CIK 0001874850.

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Business address
C/O Maxcyte, Inc., 22 Firstfield Road, Suite 110, Gaithersburg, MD, 20878
Top holdings (ownership)
MXCT

Filer intelligence

What SEC filings say about John Joseph Johnston

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

  • Forms 3/4/5 show insider context for MXCT worth $407.4K.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed
13F portfolio No rows yet

Quarterly institutional portfolio holdings.

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13D/G stakes No rows yet

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 1 rows

Officer, director, and 10% owner holdings or transactions.

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Forms 3/4/5 insider context

MXCT

18 Jun 2025

$407.4K
Issuer page Owner page

Latest update

What changed recently for John Joseph Johnston

Ownership report updated

Latest ownership report period: 18 Jun 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

23 Jun 2025

Page type

Ownership filings

Latest period

18 Jun 2025

Ownership context was refreshed from SEC Forms 3/4/5 filed on 23 Jun 2025.

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Filer Overview

John Joseph Johnston has filed 29 SEC EDGAR filings since 29 Jul 2021. Common forms include 4, 144, 3.

John Joseph Johnston SEC filings John Joseph Johnston owner filings

Latest Filings

Recent SEC filings for John Joseph Johnston with direct links to document and filing folders.

4 File 001-40674

4 filing

Filing date
23 Jun 2025
Reporting date
18 Jun 2025
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4 File 001-40674

4 filing

Filing date
29 Jan 2025
Reporting date
27 Jan 2025
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4 File 001-40674

4 filing

Filing date
30 Dec 2024
Reporting date
26 Dec 2024
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144

144 filing

Filing date
26 Dec 2024
Reporting date
Not listed
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4 File 001-40674

4 filing

Filing date
10 Dec 2024
Reporting date
06 Dec 2024
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4 File 001-40674

4 filing

Filing date
30 Oct 2024
Reporting date
28 Oct 2024
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4 File 001-40674

4 filing

Filing date
30 Sep 2024
Reporting date
26 Sep 2024
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144

144 filing

Filing date
26 Sep 2024
Reporting date
Not listed
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4 File 001-40674

4 filing

Filing date
28 Aug 2024
Reporting date
26 Aug 2024
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4 File 001-40674

4 filing

Filing date
30 Jul 2024
Reporting date
26 Jul 2024
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4 File 001-40674

4 filing

Filing date
01 Jul 2024
Reporting date
27 Jun 2024
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144

144 filing

Filing date
27 Jun 2024
Reporting date
Not listed
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4 File 001-40674

4 filing

Filing date
13 Jun 2024
Reporting date
11 Jun 2024
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4 File 001-40674

4 filing

Filing date
28 Mar 2024
Reporting date
26 Mar 2024
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4 File 001-40674

4 filing

Filing date
28 Feb 2024
Reporting date
26 Feb 2024
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144

144 filing

Filing date
26 Feb 2024
Reporting date
Not listed
SEC evidence
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4 File 001-40674

4 filing

Filing date
30 Jan 2024
Reporting date
26 Jan 2024
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4 File 001-40674

FORM 4 SUBMISSION

Filing date
28 Dec 2023
Reporting date
26 Dec 2023
SEC evidence
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4 File 001-40674

FORM 4 SUBMISSION

Filing date
29 Nov 2023
Reporting date
27 Nov 2023
SEC evidence
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4 File 001-40674

FORM 4 SUBMISSION

Filing date
16 Nov 2023
Reporting date
14 Nov 2023
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144

144 filing

Filing date
14 Nov 2023
Reporting date
Not listed
SEC evidence
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4 File 001-40674

FORM 4 SUBMISSION

Filing date
30 Aug 2023
Reporting date
28 Aug 2023
SEC evidence
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4 File 001-40674

FORM 4 SUBMISSION

Filing date
28 Jul 2023
Reporting date
26 Jul 2023
SEC evidence
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4 File 001-40674

FORM 4 SUBMISSION

Filing date
28 Jun 2023
Reporting date
26 Jun 2023
SEC evidence
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144

144 filing

Filing date
26 Jun 2023
Reporting date
Not listed
SEC evidence
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4 File 001-40674

FORM 4 SUBMISSION

Filing date
23 Jun 2023
Reporting date
22 Jun 2023
SEC evidence
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4 File 001-40674

FORM 4 SUBMISSION

Filing date
08 Jul 2022
Reporting date
29 Jun 2022
SEC evidence
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4 File 001-40674

FORM 4 SUBMISSION

Filing date
11 Aug 2021
Reporting date
09 Aug 2021
SEC evidence
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3 File 001-40674

FORM 3 SUBMISSION

Filing date
29 Jul 2021
Reporting date
29 Jul 2021
SEC evidence
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About this filer

John Joseph Johnston files with the SEC under CIK 0001874850. This page aggregates EDGAR filings and related ownership activity.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.
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