AvalonBay Communities, Inc.
US ˙ NYSE ˙ US0534841012

SecurityAVB / AvalonBay Communities, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership255,857 shares
Latest Disclosed Value $ 46,387,920
Sei Investments Co reports 4.16% decrease in ownership of AVB / AvalonBay Communities, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 255,857 shares of AvalonBay Communities, Inc. (US:AVB) valued at $46,389,433 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 266,967 shares of AvalonBay Communities, Inc.. This represents a change in shares of -4.16% during the quarter. The current value of the position is $46,870,444 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)
2026-02-13 2025-12-31 13F AVALONBAY CMNTYS COM 053484101 255,857 -11,110 -4.16 46,388 -10.05 0.0458
2025-11-13 2025-09-30 13F AVALONBAY CMNTYS COM 053484101 266,967 36,751 15.96 51,571 10.08 0.0555
2025-08-14 2025-06-30 13F AVALONBAY CMNTYS COM 053484101 230,216 -110,257 -32.38 46,849 -35.88 0.0543
2025-05-14 2025-03-31 13F/A-1 AVALONBAY CMNTYS COM 053484101 340,473 -3,666 -1.07 73,071 -3.47 0.0940
2025-05-13 2025-03-31 13F AVALONBAY CMNTYS COM 053484101 345,224 1,085 75,856 0.0825
2025-02-11 2024-12-31 13F AVALONBAY CMNTYS COM 053484101 344,139 42,416 14.06 75,701 11.38 0.0972
2024-11-12 2024-09-30 13F AVALONBAY CMNTYS COM 053484101 301,723 38,600 14.67 67,965 24.85 0.0883
2024-08-13 2024-06-30 13F AVALONBAY CMNTYS COM 053484101 263,123 -5,338 -1.99 54,437 9.28 0.0771
2024-05-07 2024-03-31 13F AVALONBAY CMNTYS COM 053484101 268,461 5,786 2.20 49,816 1.30 0.0730
2024-02-14 2023-12-31 13F AVALONBAY CMNTYS COM 053484101 262,675 -306 -0.12 49,177 8.89 0.0789
2023-11-14 2023-09-30 13F AVALONBAY CMNTYS COM 053484101 262,981 8,391 3.30 45,165 -6.27 0.0812
2023-08-11 2023-06-30 13F AVALONBAY CMNTYS COM 053484101 254,590 19,511 8.30 48,187 21.97 0.0841
2023-05-12 2023-03-31 13F AVALONBAY CMNTYS COM 053484101 235,079 8,848 3.91 39,507 8.12 0.0734
2023-02-10 2022-12-31 13F AVALONBAY CMNTYS COM 053484101 226,231 4,596 2.07 36,541 -10.49 0.0812
2022-11-14 2022-09-30 13F AVALONBAY CMNTYS COM 053484101 221,635 29,355 15.27 40,823 9.25 0.0911
2022-08-15 2022-06-30 13F AVALONBAY CMNTYS COM 053484101 192,280 34,927 22.20 37,368 -4.34 0.0807
2022-05-13 2022-03-31 13F AVALONBAY CMNTYS COM 053484101 157,353 8,454 5.68 39,063 3.80 0.0785
2022-02-14 2021-12-31 13F AVALONBAY CMNTYS COM 053484101 148,899 11,535 8.40 37,633 23.61 0.0706
2021-11-12 2021-09-30 13F AVALONBAY CMNTYS COM 053484101 137,364 -8,086 -5.56 30,445 0.28 0.0639
2021-08-06 2021-06-30 13F AVALONBAY CMNTYS COM 053484101 145,450 8,519 6.22 30,359 20.61 0.0673
2021-05-12 2021-03-31 13F AVALONBAY CMNTYS COM 053484101 136,931 7,522 5.81 25,171 21.17 0.0634
2021-02-08 2020-12-31 13F AVALONBAY CMNTYS COM 053484101 129,409 -11,592 -8.22 20,773 -1.36 0.0537
2020-12-04 2020-09-30 13F/A-1 AVALONBAY CMNTYS COM 053484101 141,001 -4,632 -3.18 21,060 -6.50 0.0610
2020-11-06 2020-09-30 13F AVALONBAY CMNTYS COM 053484101 141,071 -4,562 21,070 50,731.8753
2020-08-17 2020-06-30 13F/A-1 AVALONBAY CMNTYS COM 053484101 145,633 -45,723 -23.89 22,523 -20.06 0.0699
2020-08-11 2020-06-30 13F AVALONBAY CMNTYS COM 053484101 232,079 40,723 48,363 131,187.2119
2020-05-14 2020-03-31 13F AVALONBAY CMNTYS COM 053484101 191,356 -40,423 -17.44 28,176 -42.03 0.1035
2020-02-06 2019-12-31 13F AVALONBAY CMNTYS COM 053484101 231,779 -20,747 -8.22 48,602 -10.62 0.1450
2019-11-12 2019-09-30 13F AVALONBAY CMNTYS COM 053484101 252,526 57,626 29.57 54,376 37.35 0.1391
2019-08-14 2019-06-30 13F AVALONBAY CMNTYS COM 053484101 194,900 4,403 2.31 39,590 3.54 0.1293
2019-05-15 2019-03-31 13F AVALONBAY CMNTYS COM 053484101 190,497 -34,090 -15.18 38,238 -5.93 0.1284
2019-02-13 2018-12-31 13F AVALONBAY CMNTYS COM 053484101 224,587 921 0.41 40,649 0.33 0.1447
2018-11-08 2018-09-30 13F AVALONBAY CMNTYS COM 053484101 223,666 4,885 2.23 40,515 7.74 0.1469
2018-08-03 2018-06-30 13F AVALONBAY CMNTYS COM 053484101 218,781 203,479 1,329.75 37,606 1,394.08 0.1278
2018-05-11 2018-03-31 13F AVALONBAY CMNTYS COM 053484101 15,302 -341,387 -95.71 2,517 -97.10 0.0096
2018-02-08 2017-12-31 13F AVALONBAY CMNTYS COM 053484101 356,689 18,263 5.40 86,856 43.99 0.3016
2017-11-06 2017-09-30 13F AVALONBAY CMNTYS COM 053484101 338,426 -20,715 -5.77 60,319 -12.60 0.2144
2017-07-31 2017-06-30 13F AVALONBAY CMNTYS COM 053484101 359,141 35,892 11.10 69,015 16.29 0.2751
2017-05-05 2017-03-31 13F AVALONBAY CMNTYS COM 053484101 323,249 25,103 8.42 59,349 15.29 0.2601
2017-02-02 2016-12-31 13F AVALONBAY CMNTYS COM 053484101 298,146 -20,564 -6.45 51,479 -9.18 0.2493
2016-11-04 2016-09-30 13F AVALONBAY CMNTYS COM 053484101 318,710 17,039 5.65 56,680 4.15 0.2879
2016-08-11 2016-06-30 13F AVALONBAY CMNTYS COM 053484101 301,671 1,511 0.50 54,419 -4.68 0.3264
2016-05-10 2016-03-31 13F/A-1 AVALONBAY CMNTYS COM 053484101 300,160 3,336 1.12 57,091 4.46 0.3553
2016-02-03 2015-12-31 13F AVALONBAY CMNTYS COM 053484101 296,824 60,735 25.73 54,654 32.42 0.3331
2015-11-02 2015-09-30 13F/A-1 AVALONBAY CMNTYS COM 053484101 236,089 -87,386 -27.01 41,273 -20.19 0.3788
2015-10-30 2015-09-30 13F AVALONBAY CMNTYS COM 053484101 236,089 41,273
2015-08-07 2015-06-30 13F/A-1 AVALONBAY CMNTYS COM 053484101 323,475 -8,744 -2.63 51,714 -10.67 0.4675
2015-08-04 2015-06-30 13F AVALONBAY CMNTYS COM 053484101 323,475 -8,744 51,714 0.4675
2015-05-14 2015-03-31 13F/A-1 AVALONBAY CMNTYS COM 053484101 332,219 36,034 12.17 57,891 19.62 0.5027
2015-05-01 2015-03-31 13F AVALONBAY CMNTYS COM 053484101 332,219 57,891
2015-02-10 2014-12-31 13F AVALONBAY CMNTYS COM 053484101 296,185 296,185 48,394 0.4278
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.