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

Joseph S. Zakrzewski

CIK 0001331852. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

117

Latest Filing

23 Mar 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 23 Mar 2026 for CIK 0001331852.

View Source Filing

Business address: 509 Waterview Place, New Hope, PA, 18938
Top holdings (ownership): ANTX, CYT, AMRN, and SGMO

Filer intelligence

What SEC filings say about Joseph S. Zakrzewski

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 ANTX worth $739.5K.

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 5 rows

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

Open

Forms 3/4/5 insider context

ANTX

19 Mar 2026

$739.5K

Issuer page Owner page

CYT

06 Feb 2024

$636.3K

Issuer page Owner page

AMRN

14 Dec 2021

$214.2K

Issuer page Owner page

SGMO

25 Feb 2022

$23.2K

Issuer page Owner page

Latest update

What changed recently for Joseph S. Zakrzewski

Ownership report updated

Latest ownership report period: 19 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

23 Mar 2026

Page type

Ownership filings

Latest period

19 Mar 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 23 Mar 2026.

Open ownership filings Browse recent public updates

Filer Overview

Joseph S. Zakrzewski has filed 117 SEC EDGAR filings since 12 May 2008. Common forms include 4, 144, 4/A, 3.

Joseph S. Zakrzewski SEC filings Joseph S. Zakrzewski owner filings

Latest Filings

Recent SEC filings for Joseph S. Zakrzewski with direct links to document and filing folders.

4 File 001-41331

4

Filing date: 23 Mar 2026
Reporting date: 19 Mar 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41331

4

Filing date: 23 Feb 2026
Reporting date: 20 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41331

4

Filing date: 23 May 2025
Reporting date: 22 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41331

4

Filing date: 11 Apr 2025
Reporting date: 10 Apr 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41331

4

Filing date: 23 Dec 2024
Reporting date: 19 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41331

4

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

4 File 001-41331

4

Filing date: 20 Nov 2024
Reporting date: 18 Nov 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41331

4

Filing date: 21 Jun 2024
Reporting date: 19 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

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

4 File 001-41331

4

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

144

144 filing

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

4 File 001-41331

FORM 4 SUBMISSION

Filing date: 09 Jun 2023
Reporting date: 07 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

Filing date: 07 Feb 2023
Reporting date: 03 Feb 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 001-40499

FORM 4/A SUBMISSION

Filing date: 08 Dec 2022
Reporting date: 07 Dec 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

Filing date: 08 Dec 2022
Reporting date: 07 Dec 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41331

FORM 4 SUBMISSION

Filing date: 16 May 2022
Reporting date: 12 May 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

Filing date: 16 May 2022
Reporting date: 12 May 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

Filing date: 12 May 2022
Reporting date: 10 May 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41331

FORM 4 SUBMISSION

Filing date: 31 Mar 2022
Reporting date: 29 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-41331

FORM 3 SUBMISSION

Filing date: 24 Mar 2022
Reporting date: 24 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30171

FORM 4 SUBMISSION

Filing date: 01 Mar 2022
Reporting date: 25 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

Filing date: 24 Feb 2022
Reporting date: 22 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

Filing date: 28 Dec 2021
Reporting date: 23 Dec 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

Filing date: 21 Dec 2021
Reporting date: 17 Dec 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

PRIMARY DOCUMENT

Filing date: 16 Dec 2021
Reporting date: 14 Dec 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

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

4 File 001-36065

OWNERSHIP DOCUMENT

Filing date: 22 Nov 2021
Reporting date: 19 Nov 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-40499

FORM 4 SUBMISSION

Filing date: 24 Jun 2021
Reporting date: 22 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-40499

FORM 3 SUBMISSION

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

4 File 000-21392

PRIMARY DOCUMENT

Filing date: 16 Jun 2021
Reporting date: 14 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

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

4 File 001-36065

FORM 4 -

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

4 File 000-30171

FORM 4 SUBMISSION

Filing date: 01 Mar 2021
Reporting date: 25 Feb 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

Filing date: 02 Feb 2021
Reporting date: 29 Jan 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

PRIMARY DOCUMENT

Filing date: 22 Oct 2020
Reporting date: 21 Oct 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

PRIMARY DOCUMENT

Filing date: 15 Jul 2020
Reporting date: 13 Jul 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 000-30171

FORM 4/A SUBMISSION

Filing date: 03 Jun 2020
Reporting date: 18 May 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30171

FORM 4 SUBMISSION

Filing date: 20 May 2020
Reporting date: 18 May 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30171

FORM 4 SUBMISSION

Filing date: 19 Mar 2020
Reporting date: 17 Mar 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30171

FORM 4 SUBMISSION

Filing date: 13 Mar 2020
Reporting date: 12 Mar 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

Filing date: 24 Jan 2020
Reporting date: 22 Jan 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

Filing date: 09 Jan 2020
Reporting date: 07 Jan 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

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

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 18 Dec 2019
Reporting date: 16 Dec 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

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

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 20 Jun 2019
Reporting date: 18 Jun 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

Filing date: 17 Jun 2019
Reporting date: 14 Jun 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30171

FORM 4 SUBMISSION

Filing date: 12 Jun 2019
Reporting date: 10 Jun 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 21 May 2019
Reporting date: 20 May 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

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

4 File 001-36065

FORM 4 -

Filing date: 29 Jan 2019
Reporting date: 25 Jan 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 11 Jan 2019
Reporting date: 10 Jan 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 02 Jan 2019
Reporting date: 28 Dec 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 02 Oct 2018
Reporting date: 14 May 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 26 Sep 2018
Reporting date: 24 Sep 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30171

FORM 4 SUBMISSION

Filing date: 12 Jun 2018
Reporting date: 11 Jun 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

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

4 File 000-30171

FORM 4 SUBMISSION

Filing date: 29 Jun 2017
Reporting date: 27 Jun 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 000-30171

FORM 3 SUBMISSION

Filing date: 29 Jun 2017
Reporting date: 26 Jun 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33462

PRIMARY DOCUMENT

Filing date: 18 May 2017
Reporting date: 17 May 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 17 May 2017
Reporting date: 15 May 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

Filing date: 14 Mar 2017
Reporting date: 02 Mar 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33462

PRIMARY DOCUMENT

Filing date: 03 Mar 2017
Reporting date: 02 Mar 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

Filing date: 03 Jan 2017
Reporting date: 30 Dec 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 13 Jul 2016
Reporting date: 11 Jul 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33462

PRIMARY DOCUMENT

Filing date: 13 May 2016
Reporting date: 11 May 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

Filing date: 07 Mar 2016
Reporting date: 03 Mar 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4 SUBMISSION

Filing date: 08 Jul 2015
Reporting date: 06 Jul 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33462

PRIMARY DOCUMENT

Filing date: 18 May 2015
Reporting date: 13 May 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 001-36065

FORM 4/A -

Filing date: 08 Apr 2015
Reporting date: 08 Jan 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

Filing date: 09 Jan 2015
Reporting date: 08 Jan 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-35792

PRIMARY DOCUMENT

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

4 File 001-33462

PRIMARY DOCUMENT

Filing date: 13 Jun 2014
Reporting date: 02 Jun 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-35792

PRIMARY DOCUMENT

Filing date: 13 Jun 2014
Reporting date: 11 Jun 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-35792

PRIMARY DOCUMENT

Filing date: 13 Jun 2014
Reporting date: 11 Jun 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

2014 NON-EMPLOYEE DIRECTOR GRANT

Filing date: 13 Mar 2014
Reporting date: 11 Mar 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-36065

FORM 4 -

Filing date: 09 Dec 2013
Reporting date: 05 Dec 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

11-18-13 FORM 4

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

3 File 001-36065

FORM 3 -

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

4 File 000-21392

FORM 4

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

4 File 000-21392

FORM 4

Filing date: 25 Jun 2013
Reporting date: 25 Jun 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4

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

4 File 001-33462

PRIMARY DOCUMENT

Filing date: 05 Jun 2013
Reporting date: 03 Jun 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4

Filing date: 25 Apr 2013
Reporting date: 25 Apr 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 333-176897

JAN 2, 2013 FORM 4

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

4 File 333-176897

4 filing

Filing date: 03 Oct 2012
Reporting date: 01 Oct 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 333-176897

FORM 4

Filing date: 30 Jul 2012
Reporting date: 26 Jul 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33462

PRIMARY DOCUMENT

Filing date: 05 Jun 2012
Reporting date: 01 Jun 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 333-176897

FORM 4

Filing date: 31 May 2012
Reporting date: 29 May 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 333-176897

FORM 4

Filing date: 27 Mar 2012
Reporting date: 23 Mar 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33462

PRIMARY DOCUMENT

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

4 File 333-176897

FORM 4

Filing date: 03 Feb 2012
Reporting date: 01 Feb 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 333-176897

FORM 4

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

4 File 333-176897

FORM 4

Filing date: 24 Oct 2011
Reporting date: 20 Oct 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4

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

4/A File 000-21392

FORM 4/A

Filing date: 15 Jul 2011
Reporting date: 15 Jul 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4

Filing date: 15 Jul 2011
Reporting date: 15 Jul 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33462

PRIMARY DOCUMENT

Filing date: 13 May 2011
Reporting date: 12 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4

Filing date: 20 Apr 2011
Reporting date: 18 Apr 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

4 filing

Filing date: 09 Mar 2011
Reporting date: 09 Mar 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4

Filing date: 28 Feb 2011
Reporting date: 25 Feb 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-21392

FORM 4

Filing date: 24 Feb 2011
Reporting date: 22 Feb 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 000-21392

FORM 3

Filing date: 30 Dec 2010
Reporting date: 01 Jan 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-33462

PRIMARY DOCUMENT

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

About this filer

Joseph S. Zakrzewski files with the SEC under CIK 0001331852. 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.