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

10

Latest filing

05 Dec 2025

Industry

n/a

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: 13D/G stake for SELF. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

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Largest parsed holding

—

Populates from the latest parsed 13F information table.

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13D/G large stake

SELF

03 Dec 2025 · 8.4% ownership

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Source: SEC Schedule 13D/G

SCHEDULE 13D/A filed on 05 Dec 2025 for CIK 0001019264.

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Ownership signals CIK-linked ownership evidence from parsed SEC filings. 1 signal
Parsed SEC ownership signals

Parsed SEC ownership coverage

These bars compare filing-backed value available in each disclosure family. Read them as separate lenses, not as one combined ownership total.

Forms 3/4/5 positions$1.96M

Reporting-owner positions with enough filing detail to estimate value.

Forms 3/4/5 position value

3/4/5
$1.96M

Estimated from parsed Forms 3/4/5 when filings include enough share and price data.

Largest linked holdings

Largest issuer positions linked to this CIK across parsed 13F, 13D/G, and Forms 3/4/5 records.

SELF

Largest active 13D stakes

Active large-stake positions disclosed in parsed Schedule 13D filings.

SELF
How to read these SEC ownership signals
  • Read each filing family separately: 13F portfolios, 13D/G large stakes, and Forms 3/4/5 owner positions answer different SEC disclosure questions.
  • Open the linked research path when you need the filing, CIK, issuer, or CUSIP trail behind a value.
At a glance Names, identifiers, and filing context for this profile. 1 identity field
Business address
3814 Route 44, Millbrook, NY, 12545

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.

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SEC filing record

CIK 0001019264 filing coverage

Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.

SEC filings
10
First seen
24 Aug 2021
Latest filing
05 Dec 2025
Entity
Individual

Observed form types

4 SCHEDULE 13D/A

CIK-linked evidence first

Mark Campbell Winmill SEC filings Mark Campbell Winmill 13D/G history Mark Campbell Winmill owner filings Open SEC filing index

Latest Filings

Showing the latest 10 of 10 SEC filings for Mark Campbell Winmill.

SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
05 Dec 2025
Reporting date
Not listed
SEC evidence
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SCHEDULE 13D/A

SCHEDULE 13D/A filing

Filing date
21 May 2025
Reporting date
Not listed
SEC evidence
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4

4 filing

Filing date
16 May 2023
Reporting date
15 May 2023
SEC evidence
Open document Open filing
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4

4 filing

Filing date
29 Mar 2023
Reporting date
27 Mar 2023
SEC evidence
Open document Open filing
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4

4 filing

Filing date
21 Nov 2022
Reporting date
18 Nov 2022
SEC evidence
Open document Open filing
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4

4 filing

Filing date
24 Aug 2022
Reporting date
23 Aug 2022
SEC evidence
Open document Open filing
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4

4 filing

Filing date
23 May 2022
Reporting date
20 May 2022
SEC evidence
Open document Open filing
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4

4 filing

Filing date
29 Mar 2022
Reporting date
28 Mar 2022
SEC evidence
Open document Open filing
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4

4 filing

Filing date
25 Aug 2021
Reporting date
24 Aug 2021
SEC evidence
Open document Open filing
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4

4 filing

Filing date
24 Aug 2021
Reporting date
20 Aug 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
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