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

Richard J. Nigon SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001213869.

Entity Type

Individual

Total Filings

129

Latest Filing

13 Apr 2026

Industry

n/a

Save this filer page for the next filing cycle

Keep this page in your research queue, then return to compare new filings with prior context.

Save and revisit

Save this filer page

Create a free account to keep this page in your watchlists. After verification, we will save it automatically and open your saved research list.

Create free account and save this filer Already have an account? Sign in and save it

Best next steps

Start with the latest filings table, then open the strongest context page for this filer.

Use the filings table to verify the newest submission, form type, and report period.
Open the deeper context page only when this filer actually has insider or ownership signal.

Go to latest filings table Open reporting owner context

Source: SEC Forms 3/4/5

4 filed on 13 Apr 2026 for CIK 0001213869.

View Source Filing

Business address: C/O Northern Technologies Int'l Corp., 4201 Woodland Road, Po Box 69, Circle Pines, MN, 55014
Top holdings (ownership): CELC, TCMD, and NTIC

Quick Takeaways

Richard J. Nigon is an SEC filer tracked under CIK 0001213869.
129 filings are listed on this profile.
Common form coverage includes 4, 144, 3 and more.

What Changed

Latest filing: 4 filed on 13 Apr 2026.
Report period: 09 Apr 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 13 Apr 2026 for CIK 0001213869.

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 Richard J. Nigon.

Latest source-backed update: 4 filed 13 Apr 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 13 Apr 2026.
Save this filer if you want a stable place to return after the next filing cycle.
Open the latest filing table or ownership context to verify what changed.

Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

Jump to save and follow actions Open latest filings table

Latest update

What changed recently for Richard J. Nigon

Ownership report updated

Latest ownership report period: 09 Apr 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

13 Apr 2026

Page type

Ownership filings

Latest period

09 Apr 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 13 Apr 2026.

Open ownership filings Browse recent public updates

Filer Overview

Richard J. Nigon has filed 129 SEC EDGAR filings since 11 Feb 2003. Common forms include 4, 144, 3, 4/A and more.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for Richard J. Nigon with direct links to document and filing folders.

4 File 001-38207

4 filing

Filing date: 13 Apr 2026
Reporting date: 09 Apr 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

4 filing

Filing date: 09 Jan 2026
Reporting date: 15 Dec 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

4 filing

Filing date: 15 Sep 2025
Reporting date: 11 Sep 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 03 Sep 2025
Reporting date: 01 Sep 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 28 Jul 2025
Reporting date: 24 Jul 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

4 filing

Filing date: 21 May 2025
Reporting date: 19 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 04 Sep 2024
Reporting date: 01 Sep 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 02 Aug 2024
Reporting date: 01 Aug 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filing date: 12 Jun 2024
Reporting date: 10 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filing date: 06 Jun 2024
Reporting date: 04 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 06 Sep 2023
Reporting date: 01 Sep 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 27 Jul 2023
Reporting date: 26 Jul 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 27 Jul 2023
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filing date: 17 May 2023
Reporting date: 15 May 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

FORM 4

Filing date: 13 Sep 2022
Reporting date: 09 Sep 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 06 Sep 2022
Reporting date: 01 Sep 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

FORM 4

Filing date: 26 May 2022
Reporting date: 25 May 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

FORM 4

Filing date: 19 May 2022
Reporting date: 17 May 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 02 Sep 2021
Reporting date: 01 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 19 May 2021
Reporting date: 17 May 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

PRIMARY DOCUMENT

Filing date: 14 May 2021
Reporting date: 12 May 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 02 Sep 2020
Reporting date: 01 Sep 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

PRIMARY DOCUMENT

Filing date: 18 May 2020
Reporting date: 14 May 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 06 May 2020
Reporting date: 04 May 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 03 Jan 2020
Reporting date: 31 Dec 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 02 Oct 2019
Reporting date: 30 Sep 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 11 Sep 2019
Reporting date: 09 Sep 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 06 Sep 2019
Reporting date: 04 Sep 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 04 Sep 2019
Reporting date: 01 Sep 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 02 Jul 2019
Reporting date: 28 Jun 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

PRIMARY DOCUMENT

Filing date: 20 May 2019
Reporting date: 16 May 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 17 May 2019
Reporting date: 15 May 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 13 May 2019
Reporting date: 09 May 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 02 Apr 2019
Reporting date: 29 Mar 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 03 Jan 2019
Reporting date: 31 Dec 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 02 Oct 2018
Reporting date: 28 Sep 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

PRIMARY DOCUMENT

Filing date: 13 Sep 2018
Reporting date: 11 Sep 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 05 Sep 2018
Reporting date: 01 Sep 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 02 Jul 2018
Reporting date: 29 Jun 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

PRIMARY DOCUMENT

Filing date: 04 Jun 2018
Reporting date: 31 May 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

PRIMARY DOCUMENT

Filing date: 16 May 2018
Reporting date: 14 May 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

NIGON FORM 4

Filing date: 14 May 2018
Reporting date: 10 May 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 03 Apr 2018
Reporting date: 30 Mar 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 03 Jan 2018
Reporting date: 29 Dec 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

PRIMARY DOCUMENT

Filing date: 29 Nov 2017
Reporting date: 28 Nov 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

PRIMARY DOCUMENT

Filing date: 22 Nov 2017
Reporting date: 20 Nov 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38207

PRIMARY DOCUMENT

Filing date: 23 Oct 2017
Reporting date: 19 Oct 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 03 Oct 2017
Reporting date: 29 Sep 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-38207

PRIMARY DOCUMENT

Filing date: 19 Sep 2017
Reporting date: 19 Sep 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 08 Sep 2017
Reporting date: 07 Sep 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 05 Sep 2017
Reporting date: 01 Sep 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 05 Jul 2017
Reporting date: 30 Jun 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 11 May 2017
Reporting date: 09 May 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 01 May 2017
Reporting date: 27 Apr 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 04 Apr 2017
Reporting date: 31 Mar 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 15 Mar 2017
Reporting date: 13 Mar 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 22 Feb 2017
Reporting date: 17 Feb 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 25 Jan 2017
Reporting date: 23 Jan 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 04 Jan 2017
Reporting date: 30 Dec 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 15 Dec 2016
Reporting date: 13 Dec 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 15 Dec 2016
Reporting date: 13 Dec 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 03 Oct 2016
Reporting date: 30 Sep 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 15 Sep 2016
Reporting date: 13 Sep 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 06 Sep 2016
Reporting date: 01 Sep 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 04 Aug 2016
Reporting date: 02 Aug 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-37799

FORM 4

Filing date: 29 Jul 2016
Reporting date: 27 Jul 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-37799

FORM 3

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

4 File 000-27605

FORM 4

Filing date: 03 May 2016
Reporting date: 29 Apr 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 12 Feb 2016
Reporting date: 10 Feb 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 06 Nov 2015
Reporting date: 04 Nov 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 03 Sep 2015
Reporting date: 01 Sep 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 18 Aug 2015
Reporting date: 17 Aug 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 29 May 2015
Reporting date: 28 May 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 04 May 2015
Reporting date: 30 Apr 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 06 Apr 2015
Reporting date: 02 Apr 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 16 Jan 2015
Reporting date: 15 Jan 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 01 Dec 2014
Reporting date: 26 Nov 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 02 Sep 2014
Reporting date: 01 Sep 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 06 May 2014
Reporting date: 03 May 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 02 May 2014
Reporting date: 30 Apr 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 27 Feb 2014
Reporting date: 25 Feb 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 24 Feb 2014
Reporting date: 20 Feb 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 03 Sep 2013
Reporting date: 01 Sep 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 07 May 2013
Reporting date: 03 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 02 May 2013
Reporting date: 01 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 23 Apr 2013
Reporting date: 22 Apr 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 21 Feb 2013
Reporting date: 19 Feb 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 001-11038

PRIMARY DOCUMENT

Filing date: 19 Nov 2012
Reporting date: 01 Sep 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 19 Nov 2012
Reporting date: 16 Nov 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 04 Sep 2012
Reporting date: 01 Sep 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 24 May 2012
Reporting date: 23 May 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 08 May 2012
Reporting date: 04 May 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 23 Apr 2012
Reporting date: 20 Apr 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 06 Jan 2012
Reporting date: 04 Jan 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 02 Sep 2011
Reporting date: 01 Sep 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 26 Apr 2011
Reporting date: 22 Apr 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 07 Jan 2011
Reporting date: 05 Jan 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 03 Sep 2010
Reporting date: 01 Sep 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 27 Aug 2010
Reporting date: 27 Aug 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 20 Aug 2010
Reporting date: 18 Aug 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33815

PRIMARY DOCUMENT

Filing date: 14 Jul 2010
Reporting date: 12 Jul 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33815

PRIMARY DOCUMENT

Filing date: 17 May 2010
Reporting date: 13 May 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-27605

FORM 4

Filing date: 26 Apr 2010
Reporting date: 22 Apr 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-11038

PRIMARY DOCUMENT

Filing date: 02 Feb 2010
Reporting date: 01 Feb 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11038

PRIMARY DOCUMENT

Filing date: 02 Feb 2010
Reporting date: 01 Feb 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

Richard J. Nigon files with the SEC under CIK 0001213869. 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.