Filer Snapshot

William C. Fallon SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001334233.

Entity Type

Individual

Total Filings

63

Latest Filing

05 Mar 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 05 Mar 2026 for CIK 0001334233.

View Source Filing
Business address
C/O Mbia Inc., 1 Manhattanville Road, Suite 202, Purchase, NY, 10577
Top holdings (ownership)
MBI

Quick Takeaways

  • William C. Fallon is an SEC filer tracked under CIK 0001334233.
  • 63 filings are listed on this profile.
  • Common form coverage includes 4, 4/A, 5/A and more.

What Changed

  • Latest filing: 4 filed on 05 Mar 2026.
  • Report period: 04 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.

Source Evidence

Source: SEC Forms 3/4/5

4 filed on 05 Mar 2026 for CIK 0001334233.

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 William C. Fallon.

Latest source-backed update
4 filed 05 Mar 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 05 Mar 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 William C. Fallon

Ownership report updated

Latest ownership report period: 04 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

05 Mar 2026

Page type

Ownership filings

Latest period

04 Mar 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 05 Mar 2026.

Open ownership filings Browse recent public updates

Filer Overview

William C. Fallon has filed 63 SEC EDGAR filings since 26 Jul 2005. Common forms include 4, 4/A, 5/A, 5 and more.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for William C. Fallon with direct links to document and filing folders.

4 File 001-09583

PRIMARY DOCUMENT

Filing date
05 Mar 2026
Reporting date
04 Mar 2026
SEC evidence
Open document Open filing
Next action
Verify source filing
4/A File 001-09583

PRIMARY DOCUMENT

Filing date
04 Mar 2026
Reporting date
03 Mar 2026
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
04 Mar 2026
Reporting date
03 Mar 2026
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
05 Jan 2026
Reporting date
31 Dec 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
05 Mar 2025
Reporting date
04 Mar 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
04 Mar 2025
Reporting date
03 Mar 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
5/A File 001-09583

PRIMARY DOCUMENT

Filing date
07 Jan 2025
Reporting date
31 Dec 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
5 File 001-09583

PRIMARY DOCUMENT

Filing date
06 Jan 2025
Reporting date
31 Dec 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
06 Mar 2024
Reporting date
04 Mar 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
05 Mar 2024
Reporting date
04 Mar 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
04 Mar 2024
Reporting date
03 Mar 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
22 Feb 2024
Reporting date
20 Feb 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
03 Jan 2024
Reporting date
29 Dec 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
28 Dec 2023
Reporting date
26 Dec 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4/A File 001-09583

PRIMARY DOCUMENT

Filing date
08 Mar 2023
Reporting date
03 Mar 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
07 Mar 2023
Reporting date
03 Mar 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
07 Mar 2023
Reporting date
03 Mar 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
5 File 001-09583

PRIMARY DOCUMENT

Filing date
09 Jan 2023
Reporting date
31 Dec 2022
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
08 Mar 2022
Reporting date
05 Mar 2022
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
07 Mar 2022
Reporting date
03 Mar 2022
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
04 Jan 2022
Reporting date
31 Dec 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
09 Mar 2021
Reporting date
06 Mar 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
08 Mar 2021
Reporting date
04 Mar 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
05 Mar 2021
Reporting date
03 Mar 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
5 File 001-09583

PRIMARY DOCUMENT

Filing date
14 Jan 2021
Reporting date
31 Dec 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
19 Nov 2020
Reporting date
18 Nov 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
10 Mar 2020
Reporting date
06 Mar 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
05 Mar 2020
Reporting date
03 Mar 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
05 Mar 2020
Reporting date
03 Mar 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
02 Mar 2020
Reporting date
27 Feb 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
03 Jan 2020
Reporting date
31 Dec 2019
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
07 Mar 2019
Reporting date
05 Mar 2019
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
05 Mar 2019
Reporting date
03 Mar 2019
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
13 Nov 2018
Reporting date
08 Nov 2018
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
08 Mar 2018
Reporting date
06 Mar 2018
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
03 Jan 2018
Reporting date
31 Dec 2017
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

FORM 4 SUBMISSION

Filing date
08 Mar 2017
Reporting date
06 Mar 2017
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
04 Jan 2017
Reporting date
31 Dec 2016
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
01 Dec 2016
Reporting date
29 Nov 2016
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
07 Mar 2016
Reporting date
03 Mar 2016
SEC evidence
Open document Open filing
Next action
Verify source filing
4/A File 001-09583

PRIMARY DOCUMENT

Filing date
17 Feb 2016
Reporting date
10 Feb 2016
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
11 Feb 2016
Reporting date
10 Feb 2016
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

FORM 4

Filing date
04 Jan 2016
Reporting date
31 Dec 2015
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
10 Aug 2015
Reporting date
07 Aug 2015
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

FORM 4 SUBMISSION

Filing date
06 Mar 2015
Reporting date
04 Mar 2015
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
06 Mar 2014
Reporting date
04 Mar 2014
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

FORM 4

Filing date
06 Mar 2013
Reporting date
04 Mar 2013
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

FORM 4

Filing date
26 Dec 2012
Reporting date
21 Dec 2012
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
20 May 2011
Reporting date
19 May 2011
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

FORM 4

Filing date
26 Aug 2010
Reporting date
25 Aug 2010
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
08 Mar 2010
Reporting date
04 Mar 2010
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-09583

PRIMARY DOCUMENT

Filing date
11 Feb 2010
Reporting date
09 Feb 2010
SEC evidence
Open document Open filing
Next action
Verify source filing

About this filer

William C. Fallon files with the SEC under CIK 0001334233. 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.
We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. Here you can make detailed settings or revoke your consent (in part if necessary) with effect for the future. For further information, please refer to our Privacy Policy .