Entity Type
Individual
Filer Snapshot
Robert F. Williamson III SEC EDGAR Filings
SEC filings, ownership reports, and insider transactions for CIK 0001397331.
Total Filings
32
Latest Filing
04 Mar 2026
Industry
n/a
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Start with the latest filings table, then open the strongest context page for this filer.
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Source: SEC Forms 3/4/5
View Source Filing
4 filed on 04 Mar 2026 for CIK 0001397331.
- Business address
- 140 Lasalle Avenue, Piedmont, CA, 94610
- Top holdings (ownership)
- CATX
Quick Takeaways
- Robert F. Williamson III is an SEC filer tracked under CIK 0001397331.
- 32 filings are listed on this profile.
- Common form coverage includes 4, 4/A, 3.
What Changed
- Latest filing: 4 filed on 04 Mar 2026.
- Report period: 02 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
View Source Filing
4 filed on 04 Mar 2026 for CIK 0001397331.
Return Loop
Why revisit this filer page
A newly filed 4 can change the filing history, ownership context, or next research path for Robert F. Williamson III.
- Latest source-backed update
- 4 filed 04 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 04 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.
Latest update
What changed recently for Robert F. Williamson III
Latest ownership report period: 02 Mar 2026. Open the source-backed page to inspect the fresh filing or facts context.
Update date
04 Mar 2026
Page type
Ownership filings
Latest period
02 Mar 2026
Ownership context was refreshed from SEC Forms 3/4/5 filed on 04 Mar 2026.
Filer Overview
Robert F. Williamson III has filed 32 SEC EDGAR filings since 26 Apr 2007. Common forms include 4, 4/A, 3.
Latest Filings
Recent SEC filings for Robert F. Williamson III 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 | 4 | 04 Mar 2026 | 02 Mar 2026 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 14 Nov 2025 | 12 Nov 2025 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 01 Apr 2025 | 28 Mar 2025 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 05 Mar 2025 | 03 Mar 2025 | 001-33407 |
| 4/A | Open 4/A document | View SEC filing for 4/A | 4/A | 04 Dec 2024 | 25 Nov 2024 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 27 Nov 2024 | 25 Nov 2024 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 24 Jun 2024 | 20 Jun 2024 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 03 Jun 2024 | 31 May 2024 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | 4 | 30 May 2024 | 29 May 2024 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 | 01 Feb 2024 | 30 Jan 2024 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 | 30 Jan 2024 | 26 Jan 2024 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 | 26 Jan 2024 | 24 Jan 2024 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 | 26 Dec 2023 | 21 Dec 2023 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 | 19 Dec 2023 | 18 Dec 2023 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 | 14 Dec 2023 | 12 Dec 2023 | 001-33407 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 | 17 Mar 2023 | 21 Feb 2023 | 001-33407 |
| 3 | Open 3 document | View SEC filing for 3 | FORM 3 | 17 Mar 2023 | 03 Feb 2023 | 001-33407 |
| 4/A | Open 4/A document | View SEC filing for 4/A | MAIN DOCUMENT DESCRIPTION | 17 Jan 2012 | 12 Jan 2012 | 001-33428 |
| 4 | Open 4 document | View SEC filing for 4 | MAIN DOCUMENT DESCRIPTION | 17 Jan 2012 | 12 Jan 2012 | 001-33428 |
| 4 | Open 4 document | View SEC filing for 4 | FORM 4 SUBMISSION | 13 Oct 2011 | 11 Oct 2011 | 001-33428 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 10 May 2011 | 06 May 2011 | 001-33428 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 25 Mar 2011 | 23 Mar 2011 | 001-33428 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 18 Oct 2010 | 14 Oct 2010 | 001-33428 |
| 4 | Open 4 document | View SEC filing for 4 | PRIMARY DOCUMENT | 22 Mar 2010 | 18 Mar 2010 | 001-33428 |
About this filer
Robert F. Williamson III files with the SEC under CIK 0001397331. 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.