Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionInvesco Ltd.
Latest Disclosed Ownership6,259,685 shares
Latest Disclosed Value $ 324,877,651
Invesco Ltd. reports 52.63% increase in ownership of BXP / Boston Properties, Inc.

On May 12, 2026 - Invesco Ltd. filed a 13F-HR form disclosing ownership of 6,259,685 shares of Boston Properties, Inc. (US:BXP) valued at $324,877,652 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 19, 2026 disclosing 4,101,236 shares of Boston Properties, Inc.. This represents a change in shares of 52.63% during the quarter. The current value of the position is $388,382,156 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)
2026-05-12 2026-03-31 13F BXP COM 101121101 6,259,685 2,158,449 52.63 324,878 17.39 0.0497
2026-02-19 2025-12-31 13F BXP COM 101121101 4,101,236 204,258 5.24 276,751 -4.47 0.0424
2025-11-13 2025-09-30 13F BXP COM 101121101 3,896,978 1,207,607 44.90 289,701 59.66 0.0456
2025-08-13 2025-06-30 13F BXP COM 101121101 2,689,371 -286,987 -9.64 181,452 -9.27 0.0309
2025-05-12 2025-03-31 13F BXP COM 101121101 2,976,358 374,640 14.40 199,981 3.37 0.0379
2025-02-13 2024-12-31 13F BXP COM 101121101 2,601,718 322,506 14.15 193,464 5.50 0.0358
2024-11-12 2024-09-30 13F BXP COM 101121101 2,279,212 -579,359 -20.27 183,385 4.21 0.0354
2024-08-13 2024-06-30 13F BOSTON PROPERTIES COM 101121101 2,858,571 -94,491 -3.20 175,974 -8.76 0.0372
2024-05-14 2024-03-31 13F BOSTON PROPERTIES COM 101121101 2,953,062 794,933 36.83 192,864 27.36 0.0414
2024-02-13 2023-12-31 13F BOSTON PROPERTIES COM 101121101 2,158,129 241,893 12.62 151,436 32.86 0.0360
2023-11-13 2023-09-30 13F BOSTON PROPERTIES COM 101121101 1,916,236 -1,553,744 -44.78 113,978 -42.96 0.0307
2023-08-11 2023-06-30 13F BOSTON PROPERTIES COM 101121101 3,469,980 104,958 3.12 199,836 9.73 0.0524
2023-05-12 2023-03-31 13F BOSTON PROPERTIES COM 101121101 3,365,022 763,497 29.35 182,115 3.59 0.0508
2023-02-13 2022-12-31 13F BOSTON PROPERTIES COM 101121101 2,601,525 362,140 16.17 175,811 4.72 0.0515
2022-11-14 2022-09-30 13F BOSTON PROPERTIES COM 101121101 2,239,385 442,219 24.61 167,887 4.99 0.0540
2022-08-15 2022-06-30 13F BOSTON PROPERTIES COM 101121101 1,797,166 267,473 17.49 159,911 -18.84 0.0485
2022-05-16 2022-03-31 13F BOSTON PROPERTIES COM 101121101 1,529,693 125,874 8.97 197,025 21.85 0.0503
2022-02-14 2021-12-31 13F BOSTON PROPERTIES COM 101121101 1,403,819 352,576 33.54 161,692 41.96 0.0390
2021-11-15 2021-09-30 13F BOSTON PROPERTIES COM 101121101 1,051,243 -32,854 -3.03 113,902 -8.31 0.0289
2021-08-17 2021-06-30 13F BOSTON PROPERTIES COM 101121101 1,084,097 -925,146 -46.04 124,226 -38.94 0.0306
2021-05-17 2021-03-31 13F BOSTON PROPERTIES COM 101121101 2,009,243 -1,741,921 -46.44 203,456 -42.62 0.0543
2021-02-16 2020-12-31 13F BOSTON PROPERTIES COM 101121101 3,751,164 1,626,643 76.57 354,598 107.85 0.1032
2020-11-16 2020-09-30 13F BOSTON PROPERTIES COM 101121101 2,124,521 560,915 35.87 170,601 20.72 0.0577
2020-08-14 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP COM 101121101 1,563,606 -4,823,226 -75.52 141,318 -76.01 0.0505
2020-05-15 2020-03-31 13F BOSTON PROPERTIES COM 101121101 6,386,832 523,455 8.93 589,057 -27.13 0.2479
2020-02-14 2019-12-31 13F BOSTON PROPERTIES COM 101121101 5,863,377 25,849 0.44 808,324 6.80 0.2510
2019-11-14 2019-09-30 13F BOSTON PROPERTIES COM 101121101 5,837,528 1,551,929 36.21 756,893 36.91 0.1980
2019-08-14 2019-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 4,285,599 163,492 3.97 552,844 0.18 0.1423
2019-08-14 2019-06-30 13F BOSTON PROPERTIES COM 101121101 241,485,891 -4,078,567 31,151,683
2019-05-15 2019-03-31 13F BOSTON PROPERTIES COM 101121101 4,122,107 -180,066 -4.19 551,867 13.97 0.1861
2019-02-14 2018-12-31 13F BOSTON PROPERTIES COM 101121101 4,302,173 -41,334 -0.95 484,211 -9.43 0.1853
2018-11-14 2018-09-30 13F BOSTON PROPERTIES COM 101121101 4,343,507 3,297 0.08 534,644 -1.78 0.1682
2018-08-14 2018-06-30 13F BOSTON PROPERTIES COM 101121101 4,340,210 795,253 22.43 544,349 24.62 0.1802
2018-05-15 2018-03-31 13F BOSTON PROPERTIES COM 101121101 3,544,957 10,211 0.29 436,810 -4.96 0.1633
2018-02-14 2017-12-31 13F BOSTON PROPERTIES COM 101121101 3,534,746 -534,771 -13.14 459,623 -8.09 0.1657
2017-11-14 2017-09-30 13F BOSTON PROPERTIES COM 101121101 4,069,517 -388,044 -8.71 500,063 -8.81 0.1847
2017-08-14 2017-06-30 13F BOSTON PROPERTIES COM 101121101 4,457,561 -941,449 -17.44 548,370 -23.29 0.1706
2017-05-15 2017-03-31 13F BOSTON PROPERTIES COM 101121101 5,399,010 -277,013 -4.88 714,885 0.13 0.2347
2017-02-14 2016-12-31 13F BOSTON PROPERTIES COM 101121101 5,676,023 549,274 10.71 713,930 2.18 0.2399
2016-11-14 2016-09-30 13F BOSTON PROPERTIES COM 101121101 5,126,749 -937,236 -15.46 698,726 -12.64 0.2401
2016-08-15 2016-06-30 13F BOSTON PROPERTIES COM 101121101 6,063,985 -203,124 -3.24 799,839 0.43 0.2938
2016-05-16 2016-03-31 13F BOSTON PROPERTIES COM 101121101 6,267,109 549,391 9.61 796,424 9.21 0.3237
2016-02-16 2015-12-31 13F BOSTON PROPERTIES COM 101121101 5,717,718 -357,073 -5.88 729,237 1.39 0.2910
2015-11-16 2015-09-30 13F BOSTON PROPERTIES COM 101121101 6,074,791 -232,606 -3.69 719,255 -5.79 0.3052
2015-08-14 2015-06-30 13F BOSTON PROPERTIES COMMON 101121101 6,307,397 -294,436 -4.46 763,448 -17.68 0.2996
2015-05-15 2015-03-31 13F BOSTON PROPERTIES COMMON 101121101 6,601,833 -242,689 -3.55 927,425 5.29 0.3588
2015-02-13 2014-12-31 13F BOSTON PROPERTIES COMMON 101121101 6,844,522 -209,699 -2.97 880,822 7.86 0.3403
2014-11-14 2014-09-30 13F BOSTON PROPERTIES COMMON 101121101 7,054,221 93,041 1.34 816,597 -0.74 0.3261
2014-08-14 2014-06-30 13F BOSTON PROPERTIES COMMON 101121101 6,961,180 -108,659 -1.54 822,673 1.60 0.3237
2014-05-15 2014-03-31 13F BOSTON PROPERTIES COMMON 101121101 7,069,839 113,009 1.62 809,709 15.96 0.3285
2014-02-13 2013-12-31 13F BOSTON PROPERTIES COMMON 101121101 6,956,830 -913,199 -11.60 698,256 -17.00 0.2773
2013-11-13 2013-09-30 13F BOSTON PROPERTIES COMMON 101121101 7,870,029 351,964 4.68 841,307 6.10 0.3657
2013-08-14 2013-06-30 13F BOSTON PROPERTIES COMMON 101121101 7,518,065 7,518,065 792,931 0.3697
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.