Filer Snapshot

Mark F. ONeil SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001342016.

Entity Type

Individual

Total Filings

108

Latest Filing

14 Apr 2026

Industry

n/a

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Go to latest filings table Open reporting owner context
Source: SEC Forms 3/4/5

5 filed on 14 Apr 2026 for CIK 0001342016.

View Source Filing
Business address
C/O Carmax, Inc., 12800 Tuckahoe Creek Parkway, Richmond, VA, 23238
Top holdings (ownership)
KMX

Quick Takeaways

  • Mark F. ONeil is an SEC filer tracked under CIK 0001342016.
  • 108 filings are listed on this profile.
  • Common form coverage includes 5, 4, 3 and more.

What Changed

  • Latest filing: 5 filed on 14 Apr 2026.
  • Report period: 28 Feb 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

5 filed on 14 Apr 2026 for CIK 0001342016.

View Source Filing

Return Loop

Why revisit this filer page

A newly filed 5 can change the filing history, ownership context, or next research path for Mark F. ONeil.

Latest source-backed update
5 filed 14 Apr 2026
Why come back
Revisit after a new SEC filing appears to compare the updated record with prior filings.
  • Latest filing on record: 5 filed 14 Apr 2026.
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Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

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Latest update

What changed recently for Mark F. ONeil

Ownership report updated

Latest ownership report period: 28 Feb 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

14 Apr 2026

Page type

Ownership filings

Latest period

28 Feb 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 14 Apr 2026.

Open ownership filings Browse recent public updates

Filer Overview

Mark F. ONeil has filed 108 SEC EDGAR filings since 12 Dec 2005. Common forms include 5, 4, 3, 4/A.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for Mark F. ONeil with direct links to document and filing folders.

Form type Document Filing Description Filing date Reporting date File number(s)
5 Open 5 document View SEC filing for 5 FORM 5 14 Apr 2026 28 Feb 2026 001-31420
4 Open 4 document View SEC filing for 4 FORM 4 06 Oct 2025 02 Oct 2025 001-31420
4 Open 4 document View SEC filing for 4 FORM 4 02 Jul 2025 30 Jun 2025 001-31420
4 Open 4 document View SEC filing for 4 FORM 4 02 Jul 2024 01 Jul 2024 001-31420
4 Open 4 document View SEC filing for 4 FORM 4 05 Jul 2023 30 Jun 2023 001-31420
4 Open 4 document View SEC filing for 4 FORM 4 05 Jul 2022 01 Jul 2022 001-31420
4 Open 4 document View SEC filing for 4 FORM 4 07 Jul 2021 02 Jul 2021 001-31420
5 Open 5 document View SEC filing for 5 FORM 5 13 Apr 2021 28 Feb 2021 001-31420
4 Open 4 document View SEC filing for 4 FORM 4 02 Oct 2020 30 Sep 2020 001-31420
4 Open 4 document View SEC filing for 4 FORM 4 30 Jun 2020 26 Jun 2020 001-31420
5 Open 5 document View SEC filing for 5 FORM 5 20 Mar 2020 29 Feb 2020 001-31420
4 Open 4 document View SEC filing for 4 FORM 4 27 Dec 2019 26 Dec 2019 001-31420
3 Open 3 document View SEC filing for 3 FORM 3 17 Oct 2019 07 Oct 2019 001-31420
4 Open 4 document View SEC filing for 4 22 Jun 2015 18 Jun 2015 000-51653
4 Open 4 document View SEC filing for 4 01 Jun 2015 26 May 2015 000-51653
4 Open 4 document View SEC filing for 4 21 Apr 2015 17 Apr 2015 000-51653
4 Open 4 document View SEC filing for 4 27 Feb 2015 25 Feb 2015 000-51653
4 Open 4 document View SEC filing for 4 26 Feb 2015 24 Feb 2015 000-51653
4 Open 4 document View SEC filing for 4 05 Feb 2015 31 Jan 2015 000-51653
4 Open 4 document View SEC filing for 4 09 Dec 2014 08 Dec 2014 000-51653
4 Open 4 document View SEC filing for 4 03 Dec 2014 02 Dec 2014 000-51653
4 Open 4 document View SEC filing for 4 01 Dec 2014 26 Nov 2014 000-51653
4 Open 4 document View SEC filing for 4 19 Nov 2014 17 Nov 2014 000-51653
4 Open 4 document View SEC filing for 4 05 Nov 2014 31 Oct 2014 000-51653
4 Open 4 document View SEC filing for 4 20 Aug 2014 18 Aug 2014 000-51653
4 Open 4 document View SEC filing for 4 23 Jul 2014 21 Jul 2014 000-51653
4 Open 4 document View SEC filing for 4 17 Mar 2014 04 Mar 2014 000-51653
4/A Open 4/A document View SEC filing for 4/A 10 Mar 2014 26 Feb 2014 000-51653
4 Open 4 document View SEC filing for 4 07 Mar 2014 02 Mar 2014 000-51653
4 Open 4 document View SEC filing for 4 05 Mar 2014 03 Mar 2014 000-51653
4 Open 4 document View SEC filing for 4 03 Mar 2014 26 Feb 2014 000-51653
4 Open 4 document View SEC filing for 4 28 Feb 2014 26 Feb 2014 000-51653
4 Open 4 document View SEC filing for 4 25 Feb 2014 24 Feb 2014 000-51653
4 Open 4 document View SEC filing for 4 04 Feb 2014 31 Jan 2014 000-51653
4 Open 4 document View SEC filing for 4 02 Jan 2014 02 Jan 2014 000-51653
4 Open 4 document View SEC filing for 4 18 Nov 2013 15 Nov 2013 000-51653
4 Open 4 document View SEC filing for 4 17 Sep 2013 16 Sep 2013 000-51653
4 Open 4 document View SEC filing for 4 16 Jul 2013 15 Jul 2013 000-51653
4 Open 4 document View SEC filing for 4 17 May 2013 15 May 2013 000-51653
4 Open 4 document View SEC filing for 4 06 Mar 2013 08 Feb 2013 000-51653
4 Open 4 document View SEC filing for 4 04 Mar 2013 01 Mar 2013 000-51653
4 Open 4 document View SEC filing for 4 27 Feb 2013 25 Feb 2013 000-51653
4 Open 4 document View SEC filing for 4 30 Jan 2013 28 Jan 2013 000-51653
4 Open 4 document View SEC filing for 4 04 Dec 2012 30 Nov 2012 000-51653
4 Open 4 document View SEC filing for 4 02 Jul 2012 29 Jun 2012 000-51653
4 Open 4 document View SEC filing for 4 28 Jun 2012 26 Jun 2012 000-51653
4/A Open 4/A document View SEC filing for 4/A 04 Apr 2012 28 Feb 2012 000-51653
4 Open 4 document View SEC filing for 4 28 Mar 2012 26 Mar 2012 000-51653
4 Open 4 document View SEC filing for 4 07 Mar 2012 05 Mar 2012 000-51653
4 Open 4 document View SEC filing for 4 01 Mar 2012 28 Feb 2012 000-51653
4 Open 4 document View SEC filing for 4 31 Jan 2012 30 Jan 2012 000-51653
4 Open 4 document View SEC filing for 4 18 Jan 2012 17 Jan 2012 000-51653
4 Open 4 document View SEC filing for 4 19 Dec 2011 15 Dec 2011 000-51653
4 Open 4 document View SEC filing for 4 18 Jul 2011 15 Jul 2011 000-51653
4 Open 4 document View SEC filing for 4 18 May 2011 16 May 2011 000-51653
4 Open 4 document View SEC filing for 4 29 Mar 2011 25 Mar 2011 000-51653
4 Open 4 document View SEC filing for 4 07 Mar 2011 03 Mar 2011 000-51653
4 Open 4 document View SEC filing for 4 28 Feb 2011 24 Feb 2011 000-51653
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Apr 2010 31 Mar 2010 000-51653
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 11 Mar 2010 09 Mar 2010 000-51653
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 04 Mar 2010 02 Mar 2010 000-51653
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Feb 2010 08 Feb 2010 000-51653
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Feb 2010 29 Jan 2010 000-51653
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jan 2010 31 Dec 2009 000-51653

About this filer

Mark F. ONeil files with the SEC under CIK 0001342016. 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.