Global Self Storage, Inc.
SELF- Exchange
- Nasdaq
- Industry
- Real Estate Investment Trusts
- SEC CIK
- 0001031235
In the last 90 days, Global Self Storage, Inc. insiders filed 8 open-market purchases and 0 sales; 51 institutions reported holding it in 13F filings for Q2 2026, worth $17.5M in total; no superinvestor holds it.
Holders of 5% or more of SELF
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Global Self Storage, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Winmill Mark Campbell | 13D/A | 8.40%947.7K shares | +1.10 ppfrom 7.30% | May 21, 20252 filings | Dec 5, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
3 Schedule 13D and 13G filings on Global Self Storage, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Dec 5, 20254:26 PM ET | Winmill Mark Campbelland 5 others | 13D/A | 8.40%947.7K shares | +1.10 ppfrom 7.30% | Dec 3, 2025 | SEC |
| Nov 12, 20255:20 PM ET | Bard Associates Inc | 13G/A | 2.90%330.3K shares | –Below 5% | Aug 13, 2025 | SEC |
| May 21, 20254:01 PM ET | Winmill Mark Campbelland 5 others | 13D/A | 7.30%823.9K shares | – | May 21, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Global Self Storage, Inc. shares.
No Form 144 notices for Global Self Storage, Inc. are on file.