Key facts
- This page summarizes Mark Campbell Winmill's Form 4 filing for Global Self Storage, Inc. (SELF).
- 1 reported transaction and 0 derivative rows are listed below.
- Accepted by SEC: 15 May 2026, 16:23.
Mark Campbell Winmill - 14 May 2026 Form 4 Insider Report for Global Self Storage, Inc. (SELF)
- Reporting relationship
- President and CEO, Director
- Issuer ticker
- SELF
- Reported as of
- 14 May 2026
- Net transaction value
- +$21,320
- SEC form
- 4
- Accepted by SEC
- 15 May 2026, 16:23:00 UTC
- Prior SEC filing
- 25 Mar 2026
- Source filing
- View source filing
- Reporting owner signature
- Mark Winmill
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Mark Campbell Winmill filed Form 4 for Global Self Storage, Inc. (SELF) on 15 May 2026.
Change
- Previous filing in this sequence was filed on 25 Mar 2026.
- Current net transaction value: +$21,320.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001019264
Primary reporting owner
WINMILL MARK CAMPBELL
- Relationship
- President and CEO, Director
- Address
- 3814 ROUTE 44, MILLBROOK
- Signature
- Mark Winmill
- Signature date
- 15 May 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
SELF
transaction
Common Stock
Purchase
- Transaction value
- $21,320
- Shares
- +4,000
- Change %
- +1.1%
- Price
- $5.33
- Shares after
- 368,582
- Date
- 14 May 2026
- Ownership
- Direct
* marks a reported price that did not pass the local price check.