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

William Wesemann SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001310687.

Entity Type

Individual

Total Filings

Latest Filing

08 May 2026

Industry

n/a

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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 08 May 2026 for CIK 0001310687.

View Source Filing

Business address: 130 Montalvo Road, Redwood City, CA, 94062
Top holdings (ownership): LPSN and ACON

Quick Takeaways

William Wesemann is an SEC filer tracked under CIK 0001310687.
52 filings are listed on this profile.
Common form coverage includes 4, 3/A, 3 and more.

What Changed

Latest filing: 4 filed on 08 May 2026.
Report period: 06 May 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 08 May 2026 for CIK 0001310687.

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 Wesemann.

Latest source-backed update: 4 filed 08 May 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 08 May 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 Wesemann

Ownership report updated

Latest ownership report period: 06 May 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

08 May 2026

Page type

Ownership filings

Latest period

06 May 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 08 May 2026.

Open ownership filings Browse recent public updates

Filer Overview

William Wesemann has filed 52 SEC EDGAR filings since 03 Dec 2004. Common forms include 4, 3/A, 3, 4/A.

Reporting owner transactions Latest 13F filings

Latest Filings

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

4 File 001-41358

4 filing

Filing date: 08 May 2026
Reporting date: 06 May 2026
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41926

FORM 4

Filing date: 27 Aug 2025
Reporting date: 25 Aug 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41926

FORM 4

Filing date: 18 Dec 2024
Reporting date: 16 Dec 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41926

FORM 4

Filing date: 13 Mar 2024
Reporting date: 12 Mar 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 10 Oct 2023
Reporting date: 05 Oct 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 27 Mar 2023
Reporting date: 23 Mar 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-41358

4 filing

Filing date: 29 Dec 2022
Reporting date: 29 Dec 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 22 Sep 2022
Reporting date: 04 Aug 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

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

4 File 001-41358

4 filing

Filing date: 25 Apr 2022
Reporting date: 21 Apr 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

3/A File 001-41358

3/A filing

Filing date: 25 Apr 2022
Reporting date: 21 Apr 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-41358

3 filing

Filing date: 21 Apr 2022
Reporting date: 21 Apr 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 04 Jun 2021
Reporting date: 26 May 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 11 Feb 2021
Reporting date: 09 Feb 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

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

4 File 000-30141

FORM 4

Filing date: 04 Nov 2020
Reporting date: 02 Nov 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 05 Oct 2020
Reporting date: 01 Oct 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

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

4 File 000-30141

FORM 4

Filing date: 07 Aug 2020
Reporting date: 05 Aug 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 04 Aug 2020
Reporting date: 03 Aug 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 13 Jul 2020
Reporting date: 09 Jul 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

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

4 File 000-30141

FORM 4

Filing date: 29 Jun 2020
Reporting date: 25 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 15 Jun 2020
Reporting date: 11 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 21 Feb 2020
Reporting date: 20 Feb 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 10 Jun 2019
Reporting date: 06 Jun 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 09 May 2019
Reporting date: 07 May 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 07 Jun 2018
Reporting date: 05 Jun 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 20 Apr 2018
Reporting date: 18 Apr 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 06 Jun 2017
Reporting date: 02 Jun 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 06 Jun 2016
Reporting date: 02 Jun 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 18 May 2016
Reporting date: 16 May 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 21 Sep 2015
Reporting date: 17 Sep 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 05 Jun 2015
Reporting date: 04 Jun 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 27 Feb 2015
Reporting date: 25 Feb 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 09 Jun 2014
Reporting date: 05 Jun 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 10 Jan 2014
Reporting date: 09 Jan 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

OWNERSHIP DOCUMENT

Filing date: 07 Jun 2013
Reporting date: 06 Jun 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4/A File 000-30141

AMENDMENT TO OWNERSHIP DOCUMENT

Filing date: 20 May 2013
Reporting date: 16 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

FORM 4

Filing date: 17 May 2013
Reporting date: 16 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

OWNERSHIP DOCUMENT

Filing date: 08 Jun 2012
Reporting date: 07 Jun 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

4 filing

Filing date: 20 Jun 2011
Reporting date: 16 Jun 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 000-30141

4 filing

Filing date: 17 Jun 2010
Reporting date: 15 Jun 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

William Wesemann files with the SEC under CIK 0001310687. 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.

William Wesemann SEC EDGAR Filings

Save this filer page for the next filing cycle

Quick Takeaways

What Changed

Why This Matters

Source Evidence

Why revisit this filer page

What changed recently for William Wesemann

Filer Overview

Latest Filings

4 filing

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

4 filing

FORM 4

FORM 4

4 filing

3/A filing

3 filing

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

FORM 4

OWNERSHIP DOCUMENT

AMENDMENT TO OWNERSHIP DOCUMENT

FORM 4

OWNERSHIP DOCUMENT

4 filing

4 filing

About this filer

FAQ

Related pages