Filer Snapshot

Ernest E. Maddock SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001227050.

Entity Type

Individual

Total Filings

106

Latest Filing

19 Mar 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 19 Mar 2026 for CIK 0001227050.

View Source Filing
Business address
C/O Teradyne Inc., 600 Riverpark Drive, North Reading, MA, 01864
Top holdings (ownership)
TER, UCTT, AVT, and OUST

Quick Takeaways

  • Ernest E. Maddock is an SEC filer tracked under CIK 0001227050.
  • 106 filings are listed on this profile.
  • Common form coverage includes 4, 3.

What Changed

  • Latest filing: 4 filed on 19 Mar 2026.
  • Report period: 18 Mar 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 19 Mar 2026 for CIK 0001227050.

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 Ernest E. Maddock.

Latest source-backed update
4 filed 19 Mar 2026
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Revisit after a new SEC filing appears to compare the updated record with prior filings.
  • Latest filing on record: 4 filed 19 Mar 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 Ernest E. Maddock

Ownership report updated

Latest ownership report period: 18 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

19 Mar 2026

Page type

Ownership filings

Latest period

18 Mar 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 19 Mar 2026.

Open ownership filings Browse recent public updates

Filer Overview

Ernest E. Maddock has filed 106 SEC EDGAR filings since 02 Jun 2003. Common forms include 4, 3.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for Ernest E. Maddock 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 PRIMARY DOCUMENT 19 Mar 2026 18 Mar 2026 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 17 Mar 2026 13 Mar 2026 001-06462
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 Jan 2026 02 Jan 2026 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 Dec 2025 17 Dec 2025 001-06462
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Dec 2025 17 Dec 2025 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 01 Oct 2025 29 Sep 2025 001-06462
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 29 Sep 2025 26 Sep 2025 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Jun 2025 18 Jun 2025 001-04224
4 Open 4 document View SEC filing for 4 4 20 Jun 2025 18 Jun 2025 001-39463
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 17 Jun 2025 13 Jun 2025 001-06462
4 Open 4 document View SEC filing for 4 FORM 4 23 May 2025 21 May 2025 000-50646
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 13 May 2025 09 May 2025 001-06462
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Mar 2025 19 Mar 2025 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Mar 2025 14 Mar 2025 001-06462
4 Open 4 document View SEC filing for 4 FORM 4 11 Mar 2025 07 Mar 2025 000-50646
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Jan 2025 02 Jan 2025 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Dec 2024 18 Dec 2024 001-06462
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 Dec 2024 18 Dec 2024 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 30 Sep 2024 27 Sep 2024 001-06462
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 Sep 2024 25 Sep 2024 001-04224
4 Open 4 document View SEC filing for 4 4 19 Aug 2024 16 Aug 2024 001-39463
4 Open 4 document View SEC filing for 4 4 09 Jul 2024 21 Jun 2024 001-39463
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Jun 2024 18 Jun 2024 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Jun 2024 14 Jun 2024 001-06462
4 Open 4 document View SEC filing for 4 FORM 4 24 May 2024 22 May 2024 000-50646
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 13 May 2024 09 May 2024 001-06462
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Mar 2024 20 Mar 2024 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 Feb 2024 01 Feb 2024 001-06462
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Jan 2024 02 Jan 2024 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Dec 2023 20 Dec 2023 001-04224
4 Open 4 document View SEC filing for 4 4 16 Nov 2023 15 Nov 2023 001-39463
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 28 Sep 2023 27 Sep 2023 001-04224
4 Open 4 document View SEC filing for 4 4 22 Aug 2023 21 Aug 2023 001-39463
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 Jun 2023 21 Jun 2023 001-04224
4 Open 4 document View SEC filing for 4 FORM 4 19 May 2023 17 May 2023 000-50646
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 May 2023 12 May 2023 001-06462
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Mar 2023 15 Mar 2023 001-04224
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 14 Feb 2023 10 Feb 2023 001-39463
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 14 Feb 2023 10 Feb 2023 001-39463
4 Open 4 document View SEC filing for 4 FORM 4 13 Feb 2023 10 Feb 2023 001-38703
4 Open 4 document View SEC filing for 4 FORM 4 25 Jan 2023 23 Jan 2023 001-38703
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 Jan 2023 03 Jan 2023 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Nov 2022 14 Nov 2022 001-06462
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 16 Nov 2022 14 Nov 2022 001-06462
4 Open 4 document View SEC filing for 4 FORM 4 21 Jun 2022 16 Jun 2022 001-38703
4 Open 4 document View SEC filing for 4 FORM 4 23 May 2022 19 May 2022 000-50646
4 Open 4 document View SEC filing for 4 FORM 4 08 Mar 2022 04 Mar 2022 001-38703
3 Open 3 document View SEC filing for 3 FORM 3 18 Jan 2022 13 Jan 2022 001-38703
4 Open 4 document View SEC filing for 4 FORM 4 18 Jan 2022 13 Jan 2022 001-38703
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Jan 2022 03 Jan 2022 001-04224
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 Aug 2021 25 Aug 2021 001-04224
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 26 Aug 2021 25 Aug 2021 001-04224
4 Open 4 document View SEC filing for 4 24 May 2021 20 May 2021 000-50646
4 Open 4 document View SEC filing for 4 FORM 4 04 Jun 2020 02 Jun 2020 000-50646
4 Open 4 document View SEC filing for 4 FORM 4 28 May 2019 23 May 2019 000-50646
4 Open 4 document View SEC filing for 4 02 Aug 2018 31 Jul 2018 000-50646
4 Open 4 document View SEC filing for 4 FORM 4 01 Jun 2018 01 Jun 2018 000-50646
3 Open 3 document View SEC filing for 3 FORM 3 01 Jun 2018 01 Jun 2018 000-50646
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 Oct 2017 24 Oct 2017 001-10658
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 23 Oct 2017 19 Oct 2017 001-10658
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Oct 2017 14 Oct 2017 001-10658
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Aug 2017 11 Aug 2017 001-10658
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 06 Jun 2017 03 Jun 2017 001-10658
4 Open 4 document View SEC filing for 4 FORM 4 28 Feb 2017 24 Feb 2017 000-29617
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Oct 2016 19 Oct 2016 001-10658
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Oct 2016 14 Oct 2016 001-10658
4 Open 4 document View SEC filing for 4 FORM 4 08 Jul 2016 07 Jul 2016 000-29617
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 06 Jun 2016 03 Jun 2016 001-10658
4 Open 4 document View SEC filing for 4 FORM 4 22 Apr 2016 20 Apr 2016 000-29617
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 25 Jan 2016 21 Jan 2016 001-10658
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 28 Dec 2015 24 Dec 2015 001-10658
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Dec 2015 11 Dec 2015 001-10658
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Oct 2015 14 Oct 2015 001-10658
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 10 Jul 2015 09 Jul 2015 001-10658
3 Open 3 document View SEC filing for 3 FORM 3 09 Jul 2015 07 Jul 2015 000-29617
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 Jun 2015 03 Jun 2015 001-10658
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 05 Jun 2015 01 Jun 2015 001-10658
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 28 Apr 2015 24 Apr 2015 001-33023
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Feb 2015 02 Feb 2015 001-33023
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 Jan 2015 01 Jan 2015 001-33023
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 May 2014 15 May 2014 001-33023
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 May 2013 06 May 2013 001-33023
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 08 May 2013 29 Apr 2013 001-33023
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 06 Mar 2013 04 Mar 2013 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 07 Feb 2013 05 Feb 2013 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 30 Jan 2013 28 Jan 2013 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 09 Feb 2012 07 Feb 2012 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Feb 2012 06 Feb 2012 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 07 Feb 2012 05 Feb 2012 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Mar 2011 04 Mar 2011 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Mar 2011 02 Mar 2011 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 01 Mar 2011 25 Feb 2011 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Dec 2010 07 Dec 2010 000-12933
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 09 Feb 2010 05 Feb 2010 000-12933

About this filer

Ernest E. Maddock files with the SEC under CIK 0001227050. 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.