Filer Snapshot

Mark Mason SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001487290.

Entity Type

Individual

Total Filings

54

Latest Filing

24 Feb 2026

Industry

n/a

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Go to latest filings table Open reporting owner context
Source: SEC Forms 3/4/5

4 filed on 24 Feb 2026 for CIK 0001487290.

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Business address
388 Greenwich Street, New York, NY, 10013
Top holdings (ownership)
C and MSFT

Quick Takeaways

  • Mark Mason is an SEC filer tracked under CIK 0001487290.
  • 54 filings are listed on this profile.
  • Common form coverage includes 4, 144, 3 and more.

What Changed

  • Latest filing: 4 filed on 24 Feb 2026.
  • Report period: 20 Feb 2026.

Why This Matters

  • You can quote filing dates and form types directly from the SEC record on this page.
  • Use this profile before deeper ownership or insider analysis to confirm filing history context.

Source Evidence

Source: SEC Forms 3/4/5

4 filed on 24 Feb 2026 for CIK 0001487290.

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Return Loop

Why revisit this filer page

A newly filed 4 can change the filing history, ownership context, or next research path for Mark Mason.

Latest source-backed update
4 filed 24 Feb 2026
Why come back
Revisit after a new SEC filing appears to compare the updated record with prior filings.
  • Latest filing on record: 4 filed 24 Feb 2026.
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Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

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Latest update

What changed recently for Mark Mason

Ownership report updated

Latest ownership report period: 20 Feb 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

24 Feb 2026

Page type

Ownership filings

Latest period

20 Feb 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 24 Feb 2026.

Open ownership filings Browse recent public updates

Filer Overview

Mark Mason has filed 54 SEC EDGAR filings since 30 Mar 2010. Common forms include 4, 144, 3, 4/A.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for Mark Mason with direct links to document and filing folders.

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open 4 document View SEC filing for 4 4 24 Feb 2026 20 Feb 2026 001-09924
144 Open 144 document View SEC filing for 144 20 Feb 2026
4 Open 4 document View SEC filing for 4 4 13 Feb 2026 11 Feb 2026 001-09924
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 03 Feb 2026 30 Jan 2026 001-37845
4 Open 4 document View SEC filing for 4 4 20 Jan 2026 20 Jan 2026 001-09924
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 05 Dec 2025 04 Dec 2025 001-37845
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 12 Sep 2025 10 Sep 2025 001-37845
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 11 Jun 2025 10 Jun 2025 001-37845
4 Open 4 document View SEC filing for 4 4 24 Feb 2025 21 Feb 2025 001-09924
4 Open 4 document View SEC filing for 4 4 18 Feb 2025 13 Feb 2025 001-09924
144 Open 144 document View SEC filing for 144 14 Feb 2025
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 03 Feb 2025 31 Jan 2025 001-37845
4 Open 4 document View SEC filing for 4 4 22 Jan 2025 20 Jan 2025 001-09924
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 10 Dec 2024 09 Dec 2024 001-37845
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 09 Sep 2024 06 Sep 2024 001-37845
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 07 Jun 2024 07 Jun 2024 001-37845
4 Open 4 document View SEC filing for 4 4 27 Feb 2024 23 Feb 2024 001-09924
4 Open 4 document View SEC filing for 4 4 20 Feb 2024 15 Feb 2024 001-09924
4 Open 4 document View SEC filing for 4 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 01 Feb 2024 31 Jan 2024 001-37845
4 Open 4 document View SEC filing for 4 4 23 Jan 2024 20 Jan 2024 001-09924
3 Open 3 document View SEC filing for 3 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES 08 Dec 2023 07 Dec 2023 001-37845
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 21 Feb 2023 16 Feb 2023 001-09924
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 24 Jan 2023 20 Jan 2023 001-09924
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 14 Feb 2022 10 Feb 2022 001-09924
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 24 Jan 2022 20 Jan 2022 001-09924
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 May 2021 07 May 2021 001-09924
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Feb 2021 11 Feb 2021 001-09924
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 22 Jan 2021 20 Jan 2021 001-09924
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 14 Feb 2020 13 Feb 2020 001-09924
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 22 Jan 2020 20 Jan 2020 001-09924
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Mar 2019 15 Mar 2019 001-34680
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 04 Mar 2019 23 Feb 2019 001-09924
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Dec 2018 14 Dec 2018 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Sep 2018 14 Sep 2018 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Jun 2018 14 Jun 2018 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 May 2018 16 May 2018 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 Mar 2018 16 Mar 2018 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Dec 2017 15 Dec 2017 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Sep 2017 15 Sep 2017 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 Jun 2017 15 Jun 2017 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 May 2017 17 May 2017 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 24 May 2016 20 May 2016 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 May 2015 20 May 2015 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 May 2014 21 May 2014 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 24 May 2013 22 May 2013 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 17 May 2012 16 May 2012 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Dec 2011 19 Dec 2011 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Nov 2011 15 Nov 2011 001-34680
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Apr 2011 20 Apr 2011 001-34680
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Apr 2010 15 Apr 2010 001-34680
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 08 Apr 2010 07 Apr 2010 001-34680
4/A Open 4/A document View SEC filing for 4/A FORM 4/A SUBMISSION 05 Apr 2010 01 Apr 2010 001-34680
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Apr 2010 01 Apr 2010 001-34680
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 30 Mar 2010 31 Mar 2010 001-34680

About this filer

Mark Mason files with the SEC under CIK 0001487290. 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.