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

Mark W. Begor SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001335111.

Entity Type

Individual

Total Filings

Latest Filing

28 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 28 Apr 2026 for CIK 0001335111.

View Source Filing

Business address: Equifax Inc, 1550 Peachtree Street Nw, Atlanta, GA, 30309
Top holdings (ownership): EFX, NATL, and RJF

Quick Takeaways

Mark W. Begor is an SEC filer tracked under CIK 0001335111.
91 filings are listed on this profile.
Common form coverage includes 4, 144, 3 and more.

What Changed

Latest filing: 4 filed on 28 Apr 2026.
Report period: 24 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 28 Apr 2026 for CIK 0001335111.

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 Mark W. Begor.

Latest source-backed update: 4 filed 28 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 28 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 Mark W. Begor

Ownership report updated

Latest ownership report period: 24 Apr 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

28 Apr 2026

Page type

Ownership filings

Latest period

24 Apr 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 28 Apr 2026.

Open ownership filings Browse recent public updates

Filer Overview

Mark W. Begor has filed 91 SEC EDGAR filings since 08 Aug 2005. Common forms include 4, 144, 3, 4/A and more.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for Mark W. Begor with direct links to document and filing folders.

4 File 001-06605

4 filing

Filing date: 28 Apr 2026
Reporting date: 24 Apr 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 24 Apr 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 27 Feb 2026
Reporting date: 25 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-09109

4 filing

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

4 File 001-06605

4 filing

Filing date: 12 Feb 2026
Reporting date: 10 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 10 Feb 2026
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 05 Feb 2026
Reporting date: 03 Feb 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 05 Jan 2026
Reporting date: 31 Dec 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 29 Oct 2025
Reporting date: 27 Oct 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 27 Oct 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 30 Jul 2025
Reporting date: 28 Jul 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 28 Jul 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41728

4 filing

Filing date: 23 May 2025
Reporting date: 21 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-09109

4 filing

Filing date: 23 May 2025
Reporting date: 21 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-09109

3 filing

Filing date: 23 May 2025
Reporting date: 21 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 30 Apr 2025
Reporting date: 28 Apr 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 28 Apr 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41728

4 filing

Filing date: 02 Apr 2025
Reporting date: 31 Mar 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 18 Feb 2025
Reporting date: 13 Feb 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 13 Feb 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 13 Feb 2025
Reporting date: 11 Feb 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 12 Feb 2025
Reporting date: 10 Feb 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41728

4 filing

Filing date: 03 Jan 2025
Reporting date: 31 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

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

144

144 filing

Filing date: 25 Oct 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41728

4 filing

Filing date: 02 Oct 2024
Reporting date: 30 Sep 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 30 Jul 2024
Reporting date: 26 Jul 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

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

4 File 001-06605

4 filing

Filing date: 25 Jul 2024
Reporting date: 23 Jul 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41728

4

Filing date: 02 Jul 2024
Reporting date: 30 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41728

4

Filing date: 23 May 2024
Reporting date: 21 May 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 30 Apr 2024
Reporting date: 26 Apr 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

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

4 File 001-06605

4 filing

Filing date: 29 Feb 2024
Reporting date: 28 Feb 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 28 Feb 2024
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 14 Feb 2024
Reporting date: 12 Feb 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 13 Feb 2024
Reporting date: 09 Feb 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 02 Nov 2023
Reporting date: 01 Nov 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 01 Nov 2023
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41728

FORM 4 SUBMISSION

Filing date: 18 Oct 2023
Reporting date: 16 Oct 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-41728

FORM 3 SUBMISSION

Filing date: 18 Oct 2023
Reporting date: 16 Oct 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 03 Oct 2023
Reporting date: 29 Sep 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 04 Aug 2023
Reporting date: 02 Aug 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 02 Aug 2023
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 05 Jul 2023
Reporting date: 30 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

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

144

144 filing

Filing date: 18 May 2023
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 04 May 2023
Reporting date: 02 May 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 04 Apr 2023
Reporting date: 31 Mar 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 23 Feb 2023
Reporting date: 21 Feb 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 14 Feb 2023
Reporting date: 10 Feb 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 05 Jan 2023
Reporting date: 03 Jan 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

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

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 03 Oct 2022
Reporting date: 30 Sep 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 02 Aug 2022
Reporting date: 29 Jul 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 01 Jul 2022
Reporting date: 30 Jun 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 04 May 2022
Reporting date: 02 May 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 28 Apr 2022
Reporting date: 27 Apr 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 01 Apr 2022
Reporting date: 31 Mar 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

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

4 File 001-06605

4 filing

Filing date: 15 Feb 2022
Reporting date: 11 Feb 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 04 Jan 2022
Reporting date: 31 Dec 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 04 Oct 2021
Reporting date: 30 Sep 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 02 Jul 2021
Reporting date: 30 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 06 May 2021
Reporting date: 04 May 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 22 Apr 2021
Reporting date: 20 Apr 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 01 Apr 2021
Reporting date: 31 Mar 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 17 Feb 2021
Reporting date: 12 Feb 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 05 Jan 2021
Reporting date: 31 Dec 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 01 Oct 2020
Reporting date: 30 Sep 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 01 Jul 2020
Reporting date: 30 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-00395

FORM 4 SUBMISSION

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

4 File 001-00395

FORM 4 SUBMISSION

Filing date: 02 Apr 2020
Reporting date: 31 Mar 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 001-00395

FORM 4/A SUBMISSION

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

4 File 001-00395

FORM 4 SUBMISSION

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

3 File 001-00395

FORM 3 SUBMISSION

Filing date: 03 Mar 2020
Reporting date: 26 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 25 Feb 2020
Reporting date: 21 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 26 Feb 2019
Reporting date: 22 Feb 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 30 May 2018
Reporting date: 25 May 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-06605

4 filing

Filing date: 08 May 2018
Reporting date: 04 May 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-06605

3 filing

Filing date: 25 Apr 2018
Reporting date: 16 Apr 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11689

PRIMARY DOCUMENT

Filing date: 22 Mar 2018
Reporting date: 21 Mar 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11689

PRIMARY DOCUMENT

Filing date: 28 Feb 2018
Reporting date: 28 Feb 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11689

PRIMARY DOCUMENT

Filing date: 21 Mar 2017
Reporting date: 21 Mar 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11689

PRIMARY DOCUMENT

Filing date: 16 Feb 2017
Reporting date: 15 Feb 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11689

PRIMARY DOCUMENT

Filing date: 21 Mar 2016
Reporting date: 21 Mar 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-11689

PRIMARY DOCUMENT

Filing date: 21 Mar 2016
Reporting date: 21 Mar 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

Mark W. Begor files with the SEC under CIK 0001335111. 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.