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 A. Lamkin

CIK 0001362950. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

Latest Filing

16 Dec 2025

Industry

n/a

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Start with the summary below, then verify the strongest source-backed page for this filer.

Open 13F if you want portfolio holdings.
Open 13D/G or insider pages only when this CIK has those rows.

Open reporting owner context

Source: SEC Forms 3/4/5

4 filed on 16 Dec 2025 for CIK 0001362950.

View Source Filing

Business address: C/O The Rmr Group Llc, Two Newton Pl., 255 Wash. St., Ste. 300, Newton, MA, 02458
Top holdings (ownership): SEVN, NASDAQ:OPI, and :SVC

Filer intelligence

What SEC filings say about William A. Lamkin

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

Forms 3/4/5 show insider context for SEVN worth $245.4K.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed

13F portfolio No rows yet

Quarterly institutional portfolio holdings.

Open

13D/G stakes No rows yet

Beneficial ownership and large-stake disclosures.

Open

Forms 3/4/5 4 rows

Officer, director, and 10% owner holdings or transactions.

Open

Forms 3/4/5 insider context

SEVN

28 May 2025

$245.4K

Issuer page Owner page

NASDAQ:OPI

13 Jun 2024

$209.5K

Issuer page Owner page

:SVC

15 Dec 2025

$23.5K

Issuer page Owner page

NASDAQTRMT

30 Sep 2021

Issuer page Owner page

Latest update

What changed recently for William A. Lamkin

Ownership report updated

Latest ownership report period: 15 Dec 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

16 Dec 2025

Page type

Ownership filings

Latest period

15 Dec 2025

Ownership context was refreshed from SEC Forms 3/4/5 filed on 16 Dec 2025.

Open ownership filings Browse recent public updates

Filer Overview

William A. Lamkin has filed 62 SEC EDGAR filings since 24 May 2006. Common forms include 4, 144, 3.

William A. Lamkin SEC filings William A. Lamkin owner filings

Latest Filings

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

4 File 001-11527

OWNERSHIP DOCUMENT

Filing date: 16 Dec 2025
Reporting date: 15 Dec 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

144

144 filing

Filing date: 15 Dec 2025
Reporting date: Not listed
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

OWNERSHIP DOCUMENT

Filing date: 16 Jun 2025
Reporting date: 13 Jun 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-34383

OWNERSHIP DOCUMENT

Filing date: 29 May 2025
Reporting date: 28 May 2025
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

OWNERSHIP DOCUMENT

Filing date: 18 Jun 2024
Reporting date: 14 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-34364

OWNERSHIP DOCUMENT

Filing date: 17 Jun 2024
Reporting date: 13 Jun 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-34383

OWNERSHIP DOCUMENT

Filing date: 03 Jun 2024
Reporting date: 30 May 2024
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

OWNERSHIP DOCUMENT

Filing date: 14 Jun 2023
Reporting date: 13 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-34364

OWNERSHIP DOCUMENT

Filing date: 14 Jun 2023
Reporting date: 13 Jun 2023
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-34383

OWNERSHIP DOCUMENT

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

4 File 001-34364

OWNERSHIP DOCUMENT

Filing date: 17 Jun 2022
Reporting date: 16 Jun 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

OWNERSHIP DOCUMENT

Filing date: 16 Jun 2022
Reporting date: 15 Jun 2022
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-34383

OWNERSHIP DOCUMENT

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

4 File 001-34383

OWNERSHIP DOCUMENT

Filing date: 04 Oct 2021
Reporting date: 01 Oct 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38199

OWNERSHIP DOCUMENT

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

3 File 001-34383

OWNERSHIP DOCUMENT

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

4 File 001-34364

OWNERSHIP DOCUMENT

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

4 File 001-11527

OWNERSHIP DOCUMENT

Filing date: 16 Jun 2021
Reporting date: 16 Jun 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38199

OWNERSHIP DOCUMENT

Filing date: 28 May 2021
Reporting date: 27 May 2021
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-39821

3 filing

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

4 File 001-11527

4

Filing date: 11 Jun 2020
Reporting date: 10 Jun 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-34364

4

Filing date: 28 May 2020
Reporting date: 27 May 2020
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-38199

4

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

3 File 001-38199

3

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

4 File 001-11527

4

Filing date: 13 Jun 2019
Reporting date: 13 Jun 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-34364

4

Filing date: 29 May 2019
Reporting date: 29 May 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-34364

4

Filing date: 28 Feb 2019
Reporting date: 27 Feb 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-34364

3

Filing date: 22 Jan 2019
Reporting date: 15 Jan 2019
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-35442

4

Filing date: 02 Jan 2019
Reporting date: 31 Dec 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

4

Filing date: 18 Jun 2018
Reporting date: 14 Jun 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-11527

3

Filing date: 18 Jun 2018
Reporting date: 14 Jun 2018
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-35442

4

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

4 File 001-11527

4

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

4 File 001-35442

4

Filing date: 23 May 2017
Reporting date: 23 May 2017
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

4

Filing date: 25 May 2016
Reporting date: 25 May 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-35442

4

Filing date: 25 May 2016
Reporting date: 24 May 2016
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

4

Filing date: 02 Jun 2015
Reporting date: 01 Jun 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-35442

4

Filing date: 14 May 2015
Reporting date: 13 May 2015
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

4

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

4 File 001-35442

4

Filing date: 05 May 2014
Reporting date: 02 May 2014
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

4

Filing date: 16 May 2013
Reporting date: 15 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-11527

3

Filing date: 16 May 2013
Reporting date: 15 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-09317

4

Filing date: 16 May 2013
Reporting date: 14 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-35442

4

Filing date: 14 May 2013
Reporting date: 13 May 2013
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-35442

4

Filing date: 18 Sep 2012
Reporting date: 14 Sep 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

4

Filing date: 10 May 2012
Reporting date: 09 May 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-09317

4

Filing date: 09 May 2012
Reporting date: 08 May 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

3 File 001-35442

3

Filing date: 14 Mar 2012
Reporting date: 08 Mar 2012
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

4

Filing date: 12 May 2011
Reporting date: 11 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-09317

4

Filing date: 11 May 2011
Reporting date: 10 May 2011
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-11527

FORM 4

Filing date: 16 Apr 2010
Reporting date: 15 Apr 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

4 File 001-09317

FORM 4

Filing date: 15 Apr 2010
Reporting date: 14 Apr 2010
SEC evidence: Open document Open filing
Next action: Verify source filing

About this filer

William A. Lamkin files with the SEC under CIK 0001362950. 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 A. Lamkin

Follow future filing-backed changes

What SEC filings say about William A. Lamkin

Quick read

SEC source mix

Forms 3/4/5 insider context

What changed recently for William A. Lamkin

Filer Overview

Latest Filings

OWNERSHIP DOCUMENT

144 filing

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

OWNERSHIP DOCUMENT

3 filing

4

4

4

3

4

4

4

3

4

4

3

4

4

4

4

4

4

4

4

4

4

3

4

4

4

4

4

3

4

4

FORM 4

FORM 4

About this filer

FAQ

Related pages for William A. Lamkin