글로벌 셀프 스토리지, Inc.
US ˙ NasdaqCM ˙ US37955N1063

SecuritySELF / Global Self Storage, Inc.
InstitutionBlackRock, Inc.
Latest Disclosed Ownership294,640 shares
Latest Disclosed Value $ 1,505,609
BlackRock, Inc. reports 25.02% increase in ownership of SELF / Global Self Storage, Inc.

On May 13, 2026 - BlackRock, Inc. filed a 13F-HR form disclosing ownership of 294,640 shares of Global Self Storage, Inc. (US:SELF) valued at $1,505,610 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 235,683 shares of Global Self Storage, Inc.. This represents a change in shares of 25.02% during the quarter. The current value of the position is $1,499,718 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F GLOBAL SELF STORAGE COM 37955N106 294,640 58,957 25.02 1,506 25.31 0.0000
2026-02-12 2025-12-31 13F GLOBAL SELF STORAGE COM 37955N106 235,683 80,693 52.06 1,202 54.17 0.0000
2025-11-12 2025-09-30 13F GLOBAL SELF STORAGE COM 37955N106 154,990 68,248 78.68 780 68.25 0.0000
2025-08-12 2025-06-30 13F GLOBAL SELF STORAGE COM 37955N106 86,742 -28,019 -24.42 463 -19.90 0.0000
2025-05-02 2025-03-31 13F GLOBAL SELF STORAGE COM 37955N106 114,761 18,307 18.98 578 12.45 0.0000
2025-02-07 2024-12-31 13F GLOBAL SELF STORAGE COM 37955N106 96,454 165 0.17 514 2.59 0.0000
2024-11-13 2024-09-30 13F GLOBAL SELF STORAGE COM 37955N106 96,289 -6,040 -5.90 502 0.80 0.0000
2024-08-13 2024-06-30 13F GLOBAL SELF STORAGE COM 37955N106 102,329 270 0.26 497 9.47 0.0000
2024-05-10 2024-03-31 13F GLOBAL SELF STORAGE COM 37955N106 102,059 -2,916 -2.78 454 -6.58 0.0000
2024-02-13 2023-12-31 13F GLOBAL SELF STORAGE COM 37955N106 104,975 -292 -0.28 487 -4.89 0.0000
2023-11-13 2023-09-30 13F GLOBAL SELF STORAGE COM 37955N106 105,267 50,118 90.88 512 83.81 0.0000
2023-08-11 2023-06-30 13F GLOBAL SELF STORAGE COM 37955N106 55,149 1,693 3.17 279 1.46 0.0000
2023-05-12 2023-03-31 13F GLOBAL SELF STORAGE COM 37955N106 53,456 3,762 7.57 275 13.22 0.0000
2023-02-13 2022-12-31 13F GLOBAL SELF STORAGE COM 37955N106 49,694 26,974 118.72 243 81.95 0.0000
2022-11-14 2022-09-30 13F GLOBAL SELF STORAGE COM 37955N106 22,720 -9,827 -30.19 133 -27.32 0.0000
2022-08-12 2022-06-30 13F GLOBAL SELF STORAGE COM 37955N106 32,547 -2,424 -6.93 183 -6.63 0.0000
2022-05-12 2022-03-31 13F GLOBAL SELF STORAGE COM 37955N106 34,971 -1,290 -3.56 196 -5.31 0.0000
2022-02-10 2021-12-31 13F GLOBAL SELF STORAGE COM 37955N106 36,261 1,351 3.87 207 15.00 0.0000
2021-11-09 2021-09-30 13F GLOBAL SELF STORAGE COM 37955N106 34,910 24,854 247.16 180 239.62 0.0000
2021-08-11 2021-06-30 13F GLOBAL SELF STORAGE COM 37955N106 10,056 -34,694 -77.53 53 -75.12 0.0000
2021-05-07 2021-03-31 13F GLOBAL SELF STORAGE COM 37955N106 44,750 4,528 11.26 213 32.30 0.0000
2021-02-05 2020-12-31 13F GLOBAL SELF STORAGE COM 37955N106 40,222 3,676 10.06 161 9.52 0.0000
2020-11-06 2020-09-30 13F GLOBAL SELF STORAGE COM 37955N106 36,546 3,895 11.93 147 16.67 0.0000
2020-08-14 2020-06-30 13F GLOBAL SELF STORAGE COM 37955N106 32,651 25,471 354.75 126 404.00 0.0000
2020-05-01 2020-03-31 13F GLOBAL SELF STORAGE COM 37955N106 7,180 570 8.62 25 -10.71 0.0000
2020-02-13 2019-12-31 13F GLOBAL SELF STORAGE COM 37955N106 6,610 129 1.99 28 -9.68 0.0000
2019-11-08 2019-09-30 13F GLOBAL SELF STORAGE COM 37955N106 6,481 -12,471 -65.80 31 -56.34 0.0000
2019-08-22 2019-06-30 13F/A-1 GLOBAL SELF STORAGE COM 37955N106 18,952 -31,825 -62.68 71 -63.78 0.0000
2019-08-13 2019-06-30 13F GLOBAL SELF STORAGE COM 37955N106 18,952 -31,825 71
2019-05-09 2019-03-31 13F GLOBAL SELF STORAGE COM 37955N106 50,777 -3,578 -6.58 196 -7.98 0.0000
2019-02-08 2018-12-31 13F GLOBAL SELF STORAGE COM 37955N106 54,355 -919 -1.66 213 -8.19 0.0000
2018-11-09 2018-09-30 13F GLOBAL SELF STORAGE COM 37955N106 55,274 1,811 3.39 232 4.98 0.0000
2018-08-09 2018-06-30 13F GLOBAL SELF STORAGE COM 37955N106 53,463 18,311 52.09 221 42.58 0.0000
2018-05-09 2018-03-31 13F GLOBAL SELF STORAGE COM 37955N106 35,152 -647 -1.81 155 -6.06 0.0000
2018-02-09 2017-12-31 13F GLOBAL SELF STORAGE COM 37955N106 35,799 1,540 4.50 165 -0.60 0.0000
2017-11-14 2017-09-30 13F GLOBAL SELF STORAGE COM 37955N106 34,259 -1,049 -2.97 166 -4.05 0.0000
2017-08-10 2017-06-30 13F GLOBAL SELF STORAGE COM 37955N106 35,308 14,215 67.39 173 73.00 0.0000
2017-05-12 2017-03-31 13F GLOBAL SELF STORAGE COM 37955N106 21,093 21,093 100 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.