Entity Type
Individual
- Info
- Insider Ownership
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Mark S. Zagorski SEC EDGAR Filings
SEC filings, ownership reports, and insider transactions for CIK 0001709574.
Total Filings
56
Latest Filing
03 Apr 2026
Industry
n/a
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- Business address
- C/O Doubleverify Holdings, 28 Crosby St, 6 Th Floor, New York, NY, 10013
- Top holdings (ownership)
- DV and OB
Quick Takeaways
- Mark S. Zagorski is an SEC filer tracked under CIK 0001709574.
- 56 filings are listed on this profile.
- Common form coverage includes 4, 3.
What Changed
- Latest filing: 4 filed on 03 Apr 2026.
- Report period: 31 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.
Official SEC Source
Filer Overview
Mark S. Zagorski has filed 56 SEC EDGAR filings since 12 Jul 2017. Common forms include 4, 3.
Latest Filings
Recent SEC filings for Mark S. Zagorski 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 | 03 Apr 2026 | 31 Mar 2026 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 16 Mar 2026 | 12 Mar 2026 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 12 Mar 2026 | 10 Mar 2026 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 05 Jan 2026 | 31 Dec 2025 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 17 Dec 2025 | 30 Nov 2025 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 17 Sep 2025 | 15 Sep 2025 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 21 Aug 2025 | 19 Aug 2025 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 17 Jun 2025 | 15 Jun 2025 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 | 09 Jun 2025 | 05 Jun 2025 | 001-40643 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 17 Mar 2025 | 13 Mar 2025 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 10 Mar 2025 | 06 Mar 2025 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 17 Dec 2024 | 15 Dec 2024 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 02 Oct 2024 | 30 Sep 2024 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 17 Sep 2024 | 15 Sep 2024 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 02 Jul 2024 | 30 Jun 2024 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 18 Jun 2024 | 15 Jun 2024 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 | 26 Apr 2024 | 25 Apr 2024 | 001-40643 |
| 3 | Open 3 document | View SEC filing for 3 | FORM 3 | 26 Apr 2024 | 25 Apr 2024 | 001-40643 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 02 Apr 2024 | 31 Mar 2024 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 19 Mar 2024 | 15 Mar 2024 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 03 Jan 2024 | 31 Dec 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 21 Dec 2023 | 19 Dec 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 19 Dec 2023 | 15 Dec 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 03 Oct 2023 | 30 Sep 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 21 Sep 2023 | 19 Sep 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 19 Sep 2023 | 15 Sep 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 05 Jul 2023 | 30 Jun 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 20 Jun 2023 | 15 Jun 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 04 Apr 2023 | 31 Mar 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 17 Mar 2023 | 15 Mar 2023 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 04 Jan 2023 | 31 Dec 2022 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 19 Dec 2022 | 15 Dec 2022 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 14 Dec 2022 | 12 Dec 2022 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 04 Oct 2022 | 30 Sep 2022 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 19 Sep 2022 | 15 Sep 2022 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 05 Jul 2022 | 30 Jun 2022 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 17 Jun 2022 | 15 Jun 2022 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 31 Mar 2022 | 29 Mar 2022 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 17 Mar 2022 | 15 Mar 2022 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 14 Dec 2021 | 10 Dec 2021 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 22 Jul 2021 | 21 Jul 2021 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 10 May 2021 | 20 Apr 2021 | 001-40349 |
| 3 | Open 3 document | View SEC filing for 3 | FORM 3 SUBMISSION | 20 Apr 2021 | 20 Apr 2021 | 001-40349 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 03 Apr 2020 | 01 Apr 2020 | 001-36384 |
| 3 | Open 3 document | View SEC filing for 3 | FORM 3 SUBMISSION | 03 Apr 2020 | 01 Apr 2020 | 001-36384 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 03 Apr 2020 | 01 Apr 2020 | 001-35982 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 19 Feb 2020 | 14 Feb 2020 | 001-35982 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 12 Jul 2019 | 10 Jul 2019 | 001-35982 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 04 Mar 2019 | 28 Feb 2019 | 001-35982 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 26 Feb 2019 | 14 Feb 2019 | 001-35982 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 12 Jul 2018 | 10 Jul 2018 | 001-35982 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 01 Mar 2018 | 27 Feb 2018 | 001-35982 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 20 Nov 2017 | 17 Nov 2017 | 001-35982 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 15 Aug 2017 | 11 Aug 2017 | 001-35982 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 12 Jul 2017 | 10 Jul 2017 | 001-35982 |
| 3 | Open 3 document | View SEC filing for 3 | FORM 3 SUBMISSION | 12 Jul 2017 | 10 Jul 2017 | 001-35982 |
About this filer
Mark S. Zagorski files with the SEC under CIK 0001709574. 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.