Filer Snapshot

Mark D. Nielsen SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001600809.

Entity Type

Individual

Total Filings

35

Latest Filing

22 Jan 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 22 Jan 2026 for CIK 0001600809.

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Business address
Frontier Communications, 2 Washington Street, Norwalk, CT, 06851

Quick Takeaways

  • Mark D. Nielsen is an SEC filer tracked under CIK 0001600809.
  • 35 filings are listed on this profile.
  • Common form coverage includes 4, 3, 5 and more.

What Changed

  • Latest filing: 4 filed on 22 Jan 2026.
  • Report period: 20 Jan 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 22 Jan 2026 for CIK 0001600809.

View Source Filing

Return Loop

Why revisit this filer page

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

Latest source-backed update
4 filed 22 Jan 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 22 Jan 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 D. Nielsen

Ownership report updated

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

Update date

22 Jan 2026

Page type

Ownership filings

Latest period

20 Jan 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 22 Jan 2026.

Open ownership filings Browse recent public updates

Filer Overview

Mark D. Nielsen has filed 35 SEC EDGAR filings since 04 Mar 2014. Common forms include 4, 3, 5, 4/A.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for Mark D. Nielsen 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 FORM 4 22 Jan 2026 20 Jan 2026 001-11001
4 Open 4 document View SEC filing for 4 FORM 4 16 Jan 2026 14 Jan 2026 001-11001
4 Open 4 document View SEC filing for 4 4 14 Mar 2025 12 Mar 2025 001-11001
4 Open 4 document View SEC filing for 4 4 23 Dec 2024 19 Dec 2024 001-11001
4 Open 4 document View SEC filing for 4 4 09 May 2024 07 May 2024 001-11001
4 Open 4 document View SEC filing for 4 4 15 Mar 2024 13 Mar 2024 001-11001
4 Open 4 document View SEC filing for 4 4 05 Mar 2024 01 Mar 2024 001-11001
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 11 May 2023 09 May 2023 001-11001
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 May 2022 03 Apr 2022 001-11001
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Jul 2021 07 Jul 2021 001-11001
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 03 May 2021 30 Apr 2021 001-11001
4 Open 4 document View SEC filing for 4 FORM 4 30 Apr 2021 30 Apr 2021 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Feb 2020 14 Feb 2020 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Feb 2019 15 Feb 2019 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Feb 2019 14 Feb 2019 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 13 Feb 2019 11 Feb 2019 001-11001
5 Open 5 document View SEC filing for 5 PRIMARY DOCUMENT 18 Jan 2019 31 Dec 2018 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 27 Feb 2018 23 Feb 2018 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Feb 2018 16 Feb 2018 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Feb 2018 14 Feb 2018 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Feb 2018 13 Feb 2018 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 06 Mar 2017 03 Mar 2017 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 27 Feb 2017 24 Feb 2017 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 17 Feb 2017 15 Feb 2017 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 13 Feb 2017 10 Feb 2017 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 07 Mar 2016 04 Mar 2016 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 Feb 2016 25 Feb 2016 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Feb 2016 11 Feb 2016 001-11001
4/A Open 4/A document View SEC filing for 4/A PRIMARY DOCUMENT 20 Nov 2015 10 Nov 2015 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 12 Nov 2015 10 Nov 2015 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 Mar 2015 04 Mar 2015 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 27 Feb 2015 25 Feb 2015 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Sep 2014 08 Sep 2014 001-11001
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Mar 2014 04 Mar 2014 001-11001
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 04 Mar 2014 04 Mar 2014 001-11001

About this filer

Mark D. Nielsen files with the SEC under CIK 0001600809. 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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