John Joseph Johnston

Business address
C/O Maxcyte, Inc., 22 Firstfield Road, Suite 110, Gaithersburg, MD, 20878
Top holdings (ownership)
MXCT
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John Joseph Johnston has filed 29 SEC EDGAR filings since 29 Jul 2021

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open Document Open Filing 23 Jun 2025 18 Jun 2025 001-40674
4 Open Document Open Filing 29 Jan 2025 27 Jan 2025 001-40674
4 Open Document Open Filing 30 Dec 2024 26 Dec 2024 001-40674
144 Open Document Open Filing 26 Dec 2024
4 Open Document Open Filing 10 Dec 2024 06 Dec 2024 001-40674
4 Open Document Open Filing 30 Oct 2024 28 Oct 2024 001-40674
4 Open Document Open Filing 30 Sep 2024 26 Sep 2024 001-40674
144 Open Document Open Filing 26 Sep 2024
4 Open Document Open Filing 28 Aug 2024 26 Aug 2024 001-40674
4 Open Document Open Filing 30 Jul 2024 26 Jul 2024 001-40674
4 Open Document Open Filing 01 Jul 2024 27 Jun 2024 001-40674
144 Open Document Open Filing 27 Jun 2024
4 Open Document Open Filing 13 Jun 2024 11 Jun 2024 001-40674
4 Open Document Open Filing 28 Mar 2024 26 Mar 2024 001-40674
4 Open Document Open Filing 28 Feb 2024 26 Feb 2024 001-40674
144 Open Document Open Filing 26 Feb 2024
4 Open Document Open Filing 30 Jan 2024 26 Jan 2024 001-40674
4 Open Document Open Filing FORM 4 SUBMISSION 28 Dec 2023 26 Dec 2023 001-40674
4 Open Document Open Filing FORM 4 SUBMISSION 29 Nov 2023 27 Nov 2023 001-40674
4 Open Document Open Filing FORM 4 SUBMISSION 16 Nov 2023 14 Nov 2023 001-40674
144 Open Document Open Filing 14 Nov 2023
4 Open Document Open Filing FORM 4 SUBMISSION 30 Aug 2023 28 Aug 2023 001-40674
4 Open Document Open Filing FORM 4 SUBMISSION 28 Jul 2023 26 Jul 2023 001-40674
4 Open Document Open Filing FORM 4 SUBMISSION 28 Jun 2023 26 Jun 2023 001-40674
144 Open Document Open Filing 26 Jun 2023
4 Open Document Open Filing FORM 4 SUBMISSION 23 Jun 2023 22 Jun 2023 001-40674
4 Open Document Open Filing FORM 4 SUBMISSION 08 Jul 2022 29 Jun 2022 001-40674
4 Open Document Open Filing FORM 4 SUBMISSION 11 Aug 2021 09 Aug 2021 001-40674
3 Open Document Open Filing FORM 3 SUBMISSION 29 Jul 2021 29 Jul 2021 001-40674