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.

Filer Snapshot

David W. Heinzmann

CIK 0001279765. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

105

Latest Filing

15 May 2026

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 15 May 2026 for CIK 0001279765.

View Source Filing

Business address: 28875 Cabot Drive, Novi, MI, 48377
Top holdings (ownership): LFUS and THRM

Filer intelligence

What SEC filings say about David W. Heinzmann

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 LFUS worth $16.41M.

SEC source mix

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

XML parsed

13F portfolio No rows yet

Quarterly institutional portfolio holdings.

Open

13D/G stakes No rows yet

Beneficial ownership and large-stake disclosures.

Open

Forms 3/4/5 2 rows

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

Open

Forms 3/4/5 insider context

LFUS

26 Aug 2024 · President & CEO

$16.41M

Issuer page Owner page

THRM

14 May 2026

$593.5K

Issuer page Owner page

Latest update

What changed recently for David W. Heinzmann

Ownership report updated

Latest ownership report period: 14 May 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

15 May 2026

Page type

Ownership filings

Latest period

14 May 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 15 May 2026.

Open ownership filings Browse recent public updates

Filer Overview

David W. Heinzmann has filed 105 SEC EDGAR filings since 13 Feb 2004. Common forms include 4, 144, 3.

David W. Heinzmann SEC filings David W. Heinzmann owner filings

Latest Filings

Recent SEC filings for David W. Heinzmann with direct links to document and filing folders.

4 File 000-21810

4

Filing date: 15 May 2026
Reporting date: 14 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21810

4

Filing date: 09 May 2025
Reporting date: 08 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 27 Aug 2024
Reporting date: 26 Aug 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 26 Aug 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 26 Aug 2024
Reporting date: 23 Aug 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 23 Aug 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 01 Aug 2024
Reporting date: 31 Jul 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 31 Jul 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 19 Jul 2024
Reporting date: 18 Jul 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 18 Jul 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 18 Jul 2024
Reporting date: 16 Jul 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 17 Jul 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 16 Jul 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21810

4

Filing date: 20 May 2024
Reporting date: 16 May 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 29 Apr 2024
Reporting date: 27 Apr 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 29 Apr 2024
Reporting date: 25 Apr 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 23 Apr 2024
Reporting date: 22 Apr 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21810

FORM 4 SUBMISSION

Filing date: 22 May 2023
Reporting date: 18 May 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 01 May 2023
Reporting date: 28 Apr 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 01 May 2023
Reporting date: 27 Apr 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

4 filing

Filing date: 25 Apr 2023
Reporting date: 22 Apr 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 16 Feb 2023
Reporting date: 14 Feb 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21810

FORM 4 SUBMISSION

Filing date: 06 Jun 2022
Reporting date: 02 Jun 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 02 May 2022
Reporting date: 28 Apr 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 28 Apr 2022
Reporting date: 26 Apr 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 26 Apr 2022
Reporting date: 22 Apr 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 18 Nov 2021
Reporting date: 16 Nov 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 16 Nov 2021
Reporting date: 15 Nov 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 22 Oct 2021
Reporting date: 21 Oct 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21810

FORM 4 SUBMISSION

Filing date: 24 May 2021
Reporting date: 20 May 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 29 Apr 2021
Reporting date: 27 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 28 Apr 2021
Reporting date: 26 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 27 Apr 2021
Reporting date: 23 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 26 Apr 2021
Reporting date: 22 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 13 Nov 2020
Reporting date: 11 Nov 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 05 Nov 2020
Reporting date: 05 Nov 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21810

FORM 4 SUBMISSION

Filing date: 13 Aug 2020
Reporting date: 11 Aug 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 000-21810

FORM 3 SUBMISSION

Filing date: 13 Aug 2020
Reporting date: 11 Aug 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 30 Apr 2020
Reporting date: 28 Apr 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 28 Apr 2020
Reporting date: 26 Apr 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 27 Apr 2020
Reporting date: 23 Apr 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 16 Jan 2020
Reporting date: 14 Jan 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 07 Jan 2020
Reporting date: 03 Jan 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 30 Apr 2019
Reporting date: 26 Apr 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 24 Apr 2019
Reporting date: 22 Apr 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 01 May 2018
Reporting date: 27 Apr 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 25 Apr 2018
Reporting date: 24 Apr 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 24 Apr 2018
Reporting date: 22 Apr 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 27 Feb 2018
Reporting date: 26 Feb 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 21 Feb 2018
Reporting date: 20 Feb 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 01 May 2017
Reporting date: 28 Apr 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 26 Apr 2017
Reporting date: 25 Apr 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4

Filing date: 25 Apr 2017
Reporting date: 22 Apr 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 11 Jan 2017
Reporting date: 10 Jan 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 04 Jan 2017
Reporting date: 03 Jan 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4 SUBMISSION

Filing date: 01 Sep 2016
Reporting date: 31 Aug 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4 SUBMISSION

Filing date: 05 May 2016
Reporting date: 27 Apr 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4 SUBMISSION

Filing date: 28 Apr 2016
Reporting date: 26 Apr 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4 SUBMISSION

Filing date: 27 Apr 2016
Reporting date: 25 Apr 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4 SUBMISSION

Filing date: 26 Apr 2016
Reporting date: 22 Apr 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4 SUBMISSION

Filing date: 16 Dec 2015
Reporting date: 14 Dec 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4 SUBMISSION

Filing date: 12 Nov 2015
Reporting date: 09 Nov 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

FORM 4 SUBMISSION

Filing date: 09 Nov 2015
Reporting date: 05 Nov 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 28 Apr 2015
Reporting date: 24 Apr 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 12 Nov 2014
Reporting date: 07 Nov 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-05375

4 filing

Filing date: 17 Jun 2014
Reporting date: 13 Jun 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-05375

3 filing

Filing date: 16 Jun 2014
Reporting date: 06 Jun 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 30 Apr 2014
Reporting date: 28 Apr 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 29 Apr 2014
Reporting date: 25 Apr 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 13 Jan 2014
Reporting date: 10 Jan 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 20 Nov 2013
Reporting date: 18 Nov 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 13 May 2013
Reporting date: 09 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 01 May 2013
Reporting date: 29 Apr 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 30 Apr 2013
Reporting date: 26 Apr 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

PRIMARY DOCUMENT

Filing date: 26 Apr 2013
Reporting date: 24 Apr 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 11 Jun 2012
Reporting date: 08 Jun 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 08 Jun 2012
Reporting date: 06 Jun 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 01 May 2012
Reporting date: 27 Apr 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 27 Apr 2012
Reporting date: 25 Apr 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 25 Apr 2012
Reporting date: 24 Apr 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 11 May 2011
Reporting date: 10 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 03 May 2011
Reporting date: 29 Apr 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 26 Apr 2011
Reporting date: 25 Apr 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 04 Mar 2011
Reporting date: 03 Mar 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 14 Feb 2011
Reporting date: 14 Feb 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 09 Nov 2010
Reporting date: 08 Nov 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 12 May 2010
Reporting date: 10 May 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 03 May 2010
Reporting date: 30 Apr 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-20388

MAIN DOCUMENT DESCRIPTION

Filing date: 19 Feb 2010
Reporting date: 18 Feb 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

David W. Heinzmann files with the SEC under CIK 0001279765. 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.