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

Kenneth Allen Myszkowski

CIK 0001486672. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

Latest Filing

10 Jul 2025

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 filing 144

144 filed on 10 Jul 2025 for CIK 0001486672.

View Source Filing

Business address: Arrowhead Research Corporation, 201 South Lake Avenue, Suite 703, Pasadena, CA, 91101
Top holdings (ownership): ARWR

Filer intelligence

What SEC filings say about Kenneth Allen Myszkowski

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 ARWR worth $8.97M.

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 1 rows

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

Open

Forms 3/4/5 insider context

ARWR

04 Jan 2025 · Chief Financial Officer

$8.97M

Issuer page Owner page

Latest update

What changed recently for Kenneth Allen Myszkowski

Ownership report updated

Latest ownership report period: 04 Jan 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

07 Jan 2025

Page type

Ownership filings

Latest period

04 Jan 2025

Ownership context was refreshed from SEC Forms 3/4/5 filed on 07 Jan 2025.

Open ownership filings Browse recent public updates

Filer Overview

Kenneth Allen Myszkowski has filed 60 SEC EDGAR filings since 15 Apr 2010. Common forms include 144, 4, 5, 4/A and more.

Kenneth Allen Myszkowski SEC filings Kenneth Allen Myszkowski owner filings

Latest Filings

Recent SEC filings for Kenneth Allen Myszkowski with direct links to document and filing folders.

144

144 filing

Filing date: 10 Jul 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4

Filing date: 07 Jan 2025
Reporting date: 04 Jan 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 07 Jan 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 07 Jan 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 06 Jan 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 06 Jan 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 06 Jan 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 06 Jan 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4

Filing date: 08 Mar 2024
Reporting date: 06 Mar 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 06 Mar 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4

Filing date: 08 Jan 2024
Reporting date: 04 Jan 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 05 Jan 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4

Filing date: 29 Jun 2023
Reporting date: 27 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

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

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 05 Jan 2023
Reporting date: 04 Jan 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 30 Dec 2022
Reporting date: 29 Dec 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

5 File 001-38042

FORM 5 SUBMISSION

Filing date: 30 Sep 2022
Reporting date: 30 Sep 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 06 Jan 2022
Reporting date: 05 Jan 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 04 Jan 2022
Reporting date: 01 Jan 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 12 Jan 2021
Reporting date: 11 Jan 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 07 Jan 2021
Reporting date: 06 Jan 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 05 Jan 2021
Reporting date: 01 Jan 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 12 Nov 2020
Reporting date: 09 Nov 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 22 Oct 2020
Reporting date: 20 Oct 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 27 Feb 2020
Reporting date: 25 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 23 Jan 2020
Reporting date: 21 Jan 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 08 Jan 2020
Reporting date: 06 Jan 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 03 Jan 2020
Reporting date: 01 Jan 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 07 Nov 2019
Reporting date: 05 Nov 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

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

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 03 Jun 2019
Reporting date: 31 May 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 22 May 2019
Reporting date: 21 May 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 20 Feb 2019
Reporting date: 19 Feb 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 18 Jan 2019
Reporting date: 17 Jan 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 03 Jan 2019
Reporting date: 01 Jan 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 10 Sep 2018
Reporting date: 06 Sep 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 20 Jun 2018
Reporting date: 19 Jun 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 01 Jun 2018
Reporting date: 30 May 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38042

FORM 4 SUBMISSION

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

4 File 001-38042

FORM 4 SUBMISSION

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

4 File 001-38042

FORM 4 SUBMISSION

Filing date: 03 Jan 2018
Reporting date: 01 Jan 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

5 File 001-38042

FORM 5 SUBMISSION

Filing date: 06 Oct 2017
Reporting date: 30 Sep 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

FORM 4 SUBMISSION

Filing date: 04 Jan 2017
Reporting date: 01 Jan 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 000-21898

FORM 4/A SUBMISSION

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

4 File 000-21898

FORM 4 SUBMISSION

Filing date: 24 Aug 2016
Reporting date: 22 Aug 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

FORM 4 SUBMISSION

Filing date: 08 Mar 2016
Reporting date: 04 Mar 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

FORM 4 SUBMISSION

Filing date: 09 Feb 2016
Reporting date: 06 Feb 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

FORM 4 SUBMISSION

Filing date: 04 Jan 2016
Reporting date: 30 Dec 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

RSU/STOCK OPTION GRANT

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

4 File 000-21898

OPTION EXERCISE AND SALE

Filing date: 19 Aug 2014
Reporting date: 15 Aug 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

OPTION EXERCISE

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

4 File 000-21898

RSU AND STOCK OPTION GRANT

Filing date: 10 Feb 2014
Reporting date: 06 Feb 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

STOCK OPTION GRANT 09/21/13

Filing date: 24 Sep 2013
Reporting date: 21 Sep 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

STOCK OPTION GRANT 05/06/13

Filing date: 08 May 2013
Reporting date: 06 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

STOCK OPTION GRANT 09/28/12

Filing date: 02 Oct 2012
Reporting date: 28 Sep 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

STOCK OPTION GRANT 02/16/12

Filing date: 21 Feb 2012
Reporting date: 16 Feb 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

STOCK OPTION GRANT 10/2011

Filing date: 24 Oct 2011
Reporting date: 21 Oct 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

STOCK PURCHASE AUGUST 2010

Filing date: 30 Aug 2010
Reporting date: 27 Aug 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21898

STOCK OPTION GRANT 08/2010

Filing date: 17 Aug 2010
Reporting date: 16 Aug 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 000-21898

STOCK OPTION GRANT

Filing date: 15 Apr 2010
Reporting date: 16 Nov 2009
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

Kenneth Allen Myszkowski files with the SEC under CIK 0001486672. 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.

Kenneth Allen Myszkowski

Follow future filing-backed changes

What SEC filings say about Kenneth Allen Myszkowski

Quick read

SEC source mix

Forms 3/4/5 insider context

What changed recently for Kenneth Allen Myszkowski

Filer Overview

Latest Filings

144 filing

FORM 4

144 filing

144 filing

144 filing

144 filing

144 filing

144 filing

FORM 4

144 filing

FORM 4

144 filing

FORM 4

144 filing

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 5 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 5 SUBMISSION

FORM 4 SUBMISSION

FORM 4/A SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

FORM 4 SUBMISSION

RSU/STOCK OPTION GRANT

OPTION EXERCISE AND SALE

OPTION EXERCISE

RSU AND STOCK OPTION GRANT

STOCK OPTION GRANT 09/21/13

STOCK OPTION GRANT 05/06/13

STOCK OPTION GRANT 09/28/12

STOCK OPTION GRANT 02/16/12

STOCK OPTION GRANT 10/2011

STOCK PURCHASE AUGUST 2010

STOCK OPTION GRANT 08/2010

STOCK OPTION GRANT

About this filer

FAQ

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