Filer Snapshot

Mark Campbell Winmill

CIK 0001019264. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

76

Latest Filing

15 May 2026

Industry

n/a

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  • 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 15 May 2026 for CIK 0001019264.

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Business address
3814 Route 44, Millbrook, NY, 12545
Top holdings (ownership)
SELF
Top holdings (Schedule 13D)
SELF

Filer intelligence

What SEC filings say about Mark Campbell Winmill

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

  • 1 recent 13D/G stake row found; top row is SELF at 8.4% ownership.
  • Forms 3/4/5 show insider context for SELF worth $1.96M.

SEC source mix

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

XML parsed
13F portfolio No rows yet

Quarterly institutional portfolio holdings.

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13D/G stakes 1 rows

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 1 rows

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

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13D/G large-stake context

SELF

03 Dec 2025 · Common Stock, $0.01 par value per share

8.4%
Issuer page 13D/G history

Forms 3/4/5 insider context

SELF

14 May 2026 · President and CEO

$1.96M
Issuer page Owner page

Latest update

What changed recently for Mark Campbell Winmill

Ownership report updated

Latest ownership report period: 14 May 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

15 May 2026

Page type

Ownership filings

Latest period

14 May 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 15 May 2026.

Open ownership filings Browse recent public updates

Filer Overview

Mark Campbell Winmill has filed 76 SEC EDGAR filings since 18 Feb 1997. Common forms include 4, SCHEDULE 13D/A, SC 13D/A, SC 13D and more.

Mark Campbell Winmill SEC filings Mark Campbell Winmill 13D/G history Mark Campbell Winmill owner filings

Latest Filings

Recent SEC filings for Mark Campbell Winmill with direct links to document and filing folders.

4 File 001-12681

PRIMARY DOCUMENT

Filing date
15 May 2026
Reporting date
14 May 2026
SEC evidence
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
25 Mar 2026
Reporting date
24 Mar 2026
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
05 Dec 2025
Reporting date
Not listed
SEC evidence
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
05 Dec 2025
Reporting date
03 Dec 2025
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
21 May 2025
Reporting date
Not listed
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
20 May 2025
Reporting date
19 May 2025
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
26 Mar 2025
Reporting date
25 Mar 2025
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
30 May 2024
Reporting date
28 May 2024
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
26 Mar 2024
Reporting date
25 Mar 2024
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
17 Nov 2023
Reporting date
16 Nov 2023
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
18 Aug 2023
Reporting date
17 Aug 2023
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
16 May 2023
Reporting date
15 May 2023
SEC evidence
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
29 Mar 2023
Reporting date
27 Mar 2023
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
21 Nov 2022
Reporting date
18 Nov 2022
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
24 Aug 2022
Reporting date
23 Aug 2022
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
23 May 2022
Reporting date
20 May 2022
SEC evidence
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
29 Mar 2022
Reporting date
28 Mar 2022
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
25 Aug 2021
Reporting date
24 Aug 2021
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
24 Aug 2021
Reporting date
20 Aug 2021
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
26 Mar 2021
Reporting date
25 Mar 2021
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
23 Nov 2020
Reporting date
19 Nov 2020
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
21 Aug 2020
Reporting date
19 Aug 2020
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
04 Aug 2020
Reporting date
31 Jul 2020
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
21 May 2020
Reporting date
20 May 2020
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
26 Mar 2020
Reporting date
26 Mar 2020
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
17 Dec 2019
Reporting date
13 Dec 2019
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
29 May 2019
Reporting date
28 May 2019
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
29 Mar 2019
Reporting date
27 Mar 2019
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SC 13D/A

SC 13D/A filing

Filing date
01 Jun 2018
Reporting date
Not listed
SEC evidence
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
21 May 2018
Reporting date
18 May 2018
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
02 Apr 2018
Reporting date
29 Mar 2018
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
24 Aug 2017
Reporting date
23 Aug 2017
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SC 13D

SC 13D filing

Filing date
17 Mar 2017
Reporting date
Not listed
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
01 Dec 2016
Reporting date
30 Nov 2016
SEC evidence
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4 File 811-08025

PRIMARY DOCUMENT

Filing date
26 Aug 2016
Reporting date
23 Aug 2016
SEC evidence
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
27 May 2016
Reporting date
26 May 2016
SEC evidence
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
26 May 2016
Reporting date
25 May 2016
SEC evidence
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4 File 001-12681

PRIMARY DOCUMENT

Filing date
25 May 2016
Reporting date
23 May 2016
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4 File 811-08025

PRIMARY DOCUMENT

Filing date
28 Mar 2012
Reporting date
26 Mar 2012
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4 File 811-08025

PRIMARY DOCUMENT

Filing date
19 Mar 2012
Reporting date
15 Mar 2012
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4 File 811-08025

PRIMARY DOCUMENT

Filing date
13 Mar 2012
Reporting date
09 Mar 2012
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4 File 811-08025

PRIMARY DOCUMENT

Filing date
09 Mar 2012
Reporting date
07 Mar 2012
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3 File 811-09261

PRIMARY DOCUMENT

Filing date
08 Mar 2012
Reporting date
09 Aug 2011
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About this filer

Mark Campbell Winmill files with the SEC under CIK 0001019264. 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.
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