Extra Space Storage Inc.
US ˙ NYSE ˙ US30225T1025

SecurityEXR / Extra Space Storage Inc.
InstitutionOssiam
Latest Disclosed Ownership8,449 shares
Latest Disclosed Value $ 1,107,917
Ossiam reports 10.23% increase in ownership of EXR / Extra Space Storage Inc.

On May 14, 2026 - Ossiam filed a 13F-HR form disclosing ownership of 8,449 shares of Extra Space Storage Inc. (US:EXR) valued at $1,107,917 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 7,665 shares of Extra Space Storage Inc.. This represents a change in shares of 10.23% during the quarter. The current value of the position is $1,208,545 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.

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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)
2026-05-14 2026-03-31 13F EXTRA SPACE STORAGE COM 30225T102 8,449 784 10.23 1,108 10.92 0.0195
2026-02-13 2025-12-31 13F EXTRA SPACE STORAGE COM 30225T102 7,665 -10,761 -58.40 998 -61.56 0.0199
2025-11-14 2025-09-30 13F EXTRA SPACE STORAGE COM 30225T102 18,426 9,540 107.36 2,597 98.17 0.0334
2025-08-13 2025-06-30 13F EXTRA SPACE STORAGE COM 30225T102 8,886 -1,459 -14.10 1,310 -14.71 0.0147
2025-05-14 2025-03-31 13F EXTRA SPACE STORAGE COM 30225T102 10,345 -321 -3.01 1,536 -3.70 0.0214
2025-02-13 2024-12-31 13F EXTRA SPACE STORAGE COM 30225T102 10,666 1,824 20.63 1,596 0.13 0.0275
2024-11-13 2024-09-30 13F EXTRA SPACE STORAGE COM 30225T102 8,842 -183 -2.03 1,593 13.62 0.0308
2024-08-13 2024-06-30 13F EXTRA SPACE STORAGE COM 30225T102 9,025 1,656 22.47 1,403 29.46 0.0266
2024-05-13 2024-03-31 13F EXTRA SPACE STORAGE COM 30225T102 7,369 -3,533 -32.41 1,083 -38.01 0.0190
2024-02-13 2023-12-31 13F EXTRA SPACE STORAGE COM 30225T102 10,902 -105,841 -90.66 1,748 -87.69 0.0281
2023-11-14 2023-09-30 13F EXTRA SPACE STORAGE COM 30225T102 116,743 112,983 3,004.87 14,194 2,439.00 0.2508
2023-08-11 2023-06-30 13F EXTRA SPACE STORAGE COM 30225T102 3,760 -341 -8.32 560 -16.32 0.0101
2023-05-12 2023-03-31 13F EXTRA SPACE STORAGE COM 30225T102 4,101 -3,109 -43.12 668 -37.04 0.0139
2023-02-13 2022-12-31 13F EXTRA SPACE STORAGE COM 30225T102 7,210 -11,410 -61.28 1,061 -67.01 0.0275
2022-11-14 2022-09-30 13F EXTRA SPACE STORAGE COM 30225T102 18,620 11,748 170.95 3,216 175.11 0.0931
2022-08-12 2022-06-30 13F EXTRA SPACE STORAGE COM 30225T102 6,872 -3,210 -31.84 1,169 -43.61 0.0352
2022-05-13 2022-03-31 13F EXTRA SPACE STORAGE COM 30225T102 10,082 -10,333 -50.61 2,073 -55.22 0.0542
2022-02-14 2021-12-31 13F EXTRA SPACE STORAGE COM 30225T102 20,415 -2,194 -9.70 4,629 21.88 0.1213
2021-11-12 2021-09-30 13F EXTRA SPACE STORAGE COM 30225T102 22,609 -14,926 -39.77 3,798 -41.89 0.1075
2021-08-13 2021-06-30 13F EXTRA SPACE STORAGE COM 30225T102 37,535 37,535 6,536 0.1774
2021-05-17 2021-03-31 13F EXTRA SPACE STORAGE COM 30225T102 0 -26,224 -100.00 0 -100.00
2021-02-12 2020-12-31 13F EXTRA SPACE STORAGE COM 30225T102 26,224 17,199 190.57 3,038 214.49 0.1060
2020-11-12 2020-09-30 13F EXTRA SPACE STORAGE COM 30225T102 9,025 -50,575 -84.86 966 -82.45 0.0404
2020-08-13 2020-06-30 13F EXTRA SPACE STORAGE COM 30225T102 59,600 28,234 90.01 5,505 83.26 0.3520
2020-05-14 2020-03-31 13F EXTRA SPACE STORAGE COM 30225T102 31,366 -58,565 -65.12 3,004 -68.38 0.2045
2020-02-14 2019-12-31 13F EXTRA SPACE STORAGE COM 30225T102 89,931 -8,914 -9.02 9,499 -17.74 0.7243
2019-11-13 2019-09-30 13F EXTRA SPACE STORAGE COM 30225T102 98,845 52,345 112.57 11,547 134.03 0.8053
2019-08-13 2019-06-30 13F EXTRA SPACE STORAGE COM 30225T102 46,500 46,500 4,934 0.3841
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.