Extra Space Storage Inc.
MX ˙ BMV ˙ US30225T1025
SecurityMX:EXR / Extra Space Storage Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership967,506 shares
Latest Disclosed Value $ 125,988,296
Sei Investments Co reports 19.35% increase in ownership of EXR / Extra Space Storage Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 967,506 shares of Extra Space Storage Inc. (MX:EXR) valued at $125,988,296 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 810,670 shares of Extra Space Storage Inc.. This represents a change in shares of 19.35% during the quarter.

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)
2026-02-13 2025-12-31 13F EXTRA SPACE STORAGE COM 30225T102 967,506 156,836 19.35 125,988 10.27 0.1244
2025-11-13 2025-09-30 13F EXTRA SPACE STORAGE COM 30225T102 810,670 35,500 4.58 114,256 -0.03 0.1229
2025-08-14 2025-06-30 13F EXTRA SPACE STORAGE COM 30225T102 775,170 16,278 2.14 114,291 1.42 0.1325
2025-05-14 2025-03-31 13F/A-1 EXTRA SPACE STORAGE COM 30225T102 758,892 344,070 82.94 112,688 81.59 0.1450
2025-05-13 2025-03-31 13F EXTRA SPACE STORAGE COM 30225T102 414,891 69 62,056 0.0675
2025-02-11 2024-12-31 13F EXTRA SPACE STORAGE COM 30225T102 414,822 -112,234 -21.29 62,057 -34.66 0.0797
2024-11-12 2024-09-30 13F EXTRA SPACE STORAGE COM 30225T102 527,056 -62,742 -10.64 94,970 3.61 0.1233
2024-08-13 2024-06-30 13F EXTRA SPACE STORAGE COM 30225T102 589,798 14,988 2.61 91,661 8.48 0.1299
2024-05-07 2024-03-31 13F EXTRA SPACE STORAGE COM 30225T102 574,810 -48,094 -7.72 84,497 -15.39 0.1238
2024-02-14 2023-12-31 13F EXTRA SPACE STORAGE COM 30225T102 622,904 125,813 25.31 99,870 65.25 0.1603
2023-11-14 2023-09-30 13F EXTRA SPACE STORAGE COM 30225T102 497,091 288,722 138.56 60,436 94.86 0.1086
2023-08-11 2023-06-30 13F EXTRA SPACE STORAGE COM 30225T102 208,369 72,675 53.56 31,016 40.29 0.0541
2023-05-12 2023-03-31 13F EXTRA SPACE STORAGE COM 30225T102 135,694 -112,040 -45.23 22,109 -39.37 0.0411
2023-02-10 2022-12-31 13F EXTRA SPACE STORAGE COM 30225T102 247,734 -26,532 -9.67 36,461 -23.03 0.0810
2022-11-14 2022-09-30 13F EXTRA SPACE STORAGE COM 30225T102 274,266 -17,625 -6.04 47,368 -4.73 0.1057
2022-08-15 2022-06-30 13F EXTRA SPACE STORAGE COM 30225T102 291,891 7,313 2.57 49,719 -15.02 0.1074
2022-05-13 2022-03-31 13F EXTRA SPACE STORAGE COM 30225T102 284,578 -42,585 -13.02 58,507 -21.10 0.1176
2022-02-14 2021-12-31 13F EXTRA SPACE STORAGE COM 30225T102 327,163 -169 -0.05 74,149 34.55 0.1391
2021-11-12 2021-09-30 13F EXTRA SPACE STORAGE COM 30225T102 327,332 -123,579 -27.41 55,109 -25.32 0.1156
2021-08-06 2021-06-30 13F EXTRA SPACE STORAGE COM 30225T102 450,911 51,220 12.81 73,790 39.84 0.1636
2021-05-12 2021-03-31 13F EXTRA SPACE STORAGE COM 30225T102 399,691 49,847 14.25 52,769 30.55 0.1330
2021-02-08 2020-12-31 13F EXTRA SPACE STORAGE COM 30225T102 349,844 45,348 14.89 40,419 24.03 0.1045
2020-12-04 2020-09-30 13F/A-1 EXTRA SPACE STORAGE COM 30225T102 304,496 741 0.24 32,589 16.11 0.0944
2020-11-06 2020-09-30 13F EXTRA SPACE STORAGE COM 30225T102 304,571 816 32,597 78,486.3284
2020-08-17 2020-06-30 13F/A-1 EXTRA SPACE STORAGE COM 30225T102 303,755 22,422 7.97 28,067 4.18 0.0871
2020-08-11 2020-06-30 13F EXTRA SPACE STORAGE COM 30225T102 257,311 -24,022 27,132 73,596.9942
2020-05-14 2020-03-31 13F EXTRA SPACE STORAGE COM 30225T102 281,333 26,617 10.45 26,942 0.16 0.0990
2020-02-06 2019-12-31 13F EXTRA SPACE STORAGE COM 30225T102 254,716 13,913 5.78 26,899 -4.37 0.0802
2019-11-12 2019-09-30 13F EXTRA SPACE STORAGE COM 30225T102 240,803 -49,079 -16.93 28,128 -8.54 0.0720
2019-08-14 2019-06-30 13F EXTRA SPACE STORAGE COM 30225T102 289,882 -35,105 -10.80 30,753 -7.16 0.1005
2019-05-15 2019-03-31 13F EXTRA SPACE STORAGE COM 30225T102 324,987 60,404 22.83 33,125 44.49 0.1112
2019-02-13 2018-12-31 13F EXTRA SPACE STORAGE COM 30225T102 264,583 96 0.04 22,926 0.05 0.0816
2018-11-08 2018-09-30 13F EXTRA SPACE STORAGE COM 30225T102 264,487 -68,186 -20.50 22,915 -30.99 0.0831
2018-08-03 2018-06-30 13F EXTRA SPACE STORAGE COM 30225T102 332,673 37,998 12.89 33,204 28.99 0.1129
2018-05-11 2018-03-31 13F EXTRA SPACE STORAGE COM 30225T102 294,675 -28,796 -8.90 25,742 -9.00 0.0987
2018-02-08 2017-12-31 13F EXTRA SPACE STORAGE COM 30225T102 323,471 37,778 13.22 28,287 23.89 0.0982
2017-11-06 2017-09-30 13F EXTRA SPACE STORAGE COM 30225T102 285,693 27,408 10.61 22,833 13.33 0.0812
2017-07-31 2017-06-30 13F EXTRA SPACE STORAGE COM 30225T102 258,285 99,535 62.70 20,147 70.59 0.0803
2017-05-05 2017-03-31 13F EXTRA SPACE STORAGE COM 30225T102 158,750 39,049 32.62 11,810 27.73 0.0518
2017-02-02 2016-12-31 13F EXTRA SPACE STORAGE COM 30225T102 119,701 34,443 40.40 9,246 36.57 0.0448
2016-11-04 2016-09-30 13F EXTRA SPACE STORAGE COM 30225T102 85,258 -2,877 -3.26 6,770 -16.99 0.0344
2016-08-11 2016-06-30 13F EXTRA SPACE STORAGE COM 30225T102 88,135 18,273 26.16 8,156 24.90 0.0489
2016-05-10 2016-03-31 13F/A-1 EXTRA SPACE STORAGE COM 30225T102 69,862 -8,491 -10.84 6,530 -5.51 0.0406
2016-02-03 2015-12-31 13F EXTRA SPACE STORAGE COM 30225T102 78,353 -102,883 -56.77 6,911 -50.58 0.0421
2015-11-02 2015-09-30 13F/A-1 EXTRA SPACE STORAGE COM 30225T102 181,236 -111,980 -38.19 13,984 -26.88 0.1284
2015-10-30 2015-09-30 13F DIREXION SHS ETF TR COM 30225T102 181,236 13,985
2015-08-07 2015-06-30 13F/A-1 EXTRA SPACE STORAGE COM 30225T102 293,216 -46,207 -13.61 19,124 -16.61 0.1729
2015-08-04 2015-06-30 13F EXTRA SPACE STORAGE COM 30225T102 293,216 -46,207 19,124 0.1729
2015-05-14 2015-03-31 13F/A-1 EXTRA SPACE STORAGE COM 30225T102 339,423 -32,746 -8.80 22,934 5.08 0.1992
2015-05-01 2015-03-31 13F EXTRA SPACE STORAGE COM 30225T102 339,423 22,934
2015-02-10 2014-12-31 13F EXTRA SPACE STORAGE COM 30225T102 372,169 372,169 21,825 0.1929
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.