Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionFifth Third Bancorp
Latest Disclosed Ownership50,549 shares
Latest Disclosed Value $ 2,623,493
Fifth Third Bancorp reports 5.47% increase in ownership of BXP / Boston Properties, Inc.

On May 1, 2026 - Fifth Third Bancorp filed a 13F-HR form disclosing ownership of 50,549 shares of Boston Properties, Inc. (US:BXP) valued at $2,623,493 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 47,926 shares of Boston Properties, Inc.. This represents a change in shares of 5.47% during the quarter. The current value of the position is $3,078,434 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)
2026-05-01 2026-03-31 13F BXP COM 101121101 50,549 2,623 5.47 2,623 -18.89 0.0048
2026-02-02 2025-12-31 13F BXP COM 101121101 47,926 -4,501 -8.59 3,234 -17.01 0.0103
2025-11-07 2025-09-30 13F BXP COM 101121101 52,427 743 1.44 3,897 11.76 0.0125
2025-07-15 2025-06-30 13F BXP COM 101121101 51,684 2,580 5.25 3,487 5.70 0.0121
2025-04-15 2025-03-31 13F BXP COM 101121101 49,104 -3,574 -6.78 3,299 -15.78 0.0125
2025-01-21 2024-12-31 13F BXP COM 101121101 52,678 -9,403 -15.15 3,917 -21.58 0.0142
2024-10-17 2024-09-30 13F BXP COM 101121101 62,081 -807 -1.28 4,995 29.04 0.0181
2024-07-22 2024-06-30 13F BOSTON PROPERTIES COM 101121101 62,888 9,092 16.90 3,871 10.19 0.0147
2024-04-23 2024-03-31 13F BOSTON PROPERTIES COM 101121101 53,796 7,694 16.69 3,513 8.63 0.0137
2024-01-19 2023-12-31 13F BOSTON PROPERTIES COM 101121101 46,102 1,881 4.25 3,235 22.97 0.0138
2023-10-31 2023-09-30 13F BOSTON PROPERTIES COM 101121101 44,221 -1,565 -3.42 2,630 -0.23 0.0122
2023-07-26 2023-06-30 13F BOSTON PROPERTIES COM 101121101 45,786 5,387 13.33 2,637 20.59 0.0116
2023-04-24 2023-03-31 13F BOSTON PROPERTIES COM 101121101 40,399 3,264 8.79 2,186 -12.87 0.0102
2023-01-25 2022-12-31 13F BOSTON PROPERTIES COM 101121101 37,135 3,037 8.91 2,510 -1.88 0.0121
2022-10-25 2022-09-30 13F BOSTON PROPERTIES COM 101121101 34,098 3,690 12.13 2,557 -5.51 0.0134
2022-08-04 2022-06-30 13F BOSTON PROPERTIES COM 101121101 30,408 1,772 6.19 2,706 -26.63 0.0131
2022-04-19 2022-03-31 13F BOSTON PROPERTIES COM 101121101 28,636 3,582 14.30 3,688 27.79 0.0151
2022-02-01 2021-12-31 13F BOSTON PROPERTIES COM 101121101 25,054 82 0.33 2,886 6.65 0.0112
2021-10-15 2021-09-30 13F BOSTON PROPERTIES COM 101121101 24,972 513 2.10 2,706 -3.46 0.0118
2021-08-06 2021-06-30 13F BOSTON PROPERTIES COM 101121101 24,459 -1,236 -4.81 2,803 7.72 0.0123
2021-05-07 2021-03-31 13F BOSTON PROPERTIES COM 101121101 25,695 5,254 25.70 2,602 34.68 0.0121
2021-02-16 2020-12-31 13F BOSTON PROPERTIES COM 101121101 20,441 16 0.08 1,932 17.80 0.0095
2020-11-09 2020-09-30 13F BOSTON PROPERTIES COM 101121101 20,425 3,835 23.12 1,640 9.41 0.0091
2020-08-05 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP COM 101121101 16,590 -650 -3.77 1,499 -5.72 0.0090
2020-05-05 2020-03-31 13F BOSTON PROPERTIES COM 101121101 17,240 766 4.65 1,590 -29.99 0.0113
2020-02-14 2019-12-31 13F BOSTON PROPERTIES COM 101121101 16,474 154 0.94 2,271 7.33 0.0126
2019-11-14 2019-09-30 13F BOSTON PROPERTIES COM 101121101 16,320 -51 -0.31 2,116 0.19 0.0127
2019-08-07 2019-06-30 13F BOSTON PROPERTIES COM 101121101 16,371 101 0.62 2,112 -3.03 0.0129
2019-05-14 2019-03-31 13F BOSTON PROPERTIES COM 101121101 16,270 -5,189 -24.18 2,178 -9.81 0.0140
2019-02-14 2018-12-31 13F BOSTON PROPERTIES COM 101121101 21,459 -1,976 -8.43 2,415 -16.29 0.0176
2018-11-14 2018-09-30 13F BOSTON PROPERTIES COM 101121101 23,435 907 4.03 2,885 2.12 0.0184
2018-08-14 2018-06-30 13F BOSTON PROPERTIES COM 101121101 22,528 -1,594 -6.61 2,825 -4.95 0.0192
2018-05-15 2018-03-31 13F BOSTON PROPERTIES COM 101121101 24,122 -767 -3.08 2,972 -8.16 0.0202
2018-02-14 2017-12-31 13F BOSTON PROPERTIES COM 101121101 24,889 1,344 5.71 3,236 11.86 0.0220
2017-11-14 2017-09-30 13F BOSTON PROPERTIES COM 101121101 23,545 -2,155 -8.39 2,893 -8.51 0.0207
2017-08-11 2017-06-30 13F BOSTON PROPERTIES COM 101121101 25,700 -651 -2.47 3,162 -9.37 0.0233
2017-05-12 2017-03-31 13F BOSTON PROPERTIES COM 101121101 26,351 -650 -2.41 3,489 2.74 0.0264
2017-02-13 2016-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 27,001 2,583 10.58 3,396 2.04 0.0274
2017-02-09 2016-12-31 13F BOSTON PROPERTIES COM 101121101 24,418 0 3,328 0.0275
2016-11-10 2016-09-30 13F BOSTON PROPERTIES COM 101121101 24,418 -1,579 -6.07 3,328 -2.95 0.0275
2016-08-11 2016-06-30 13F BOSTON PROPERTIES COM 101121101 25,997 -1,116 -4.12 3,429 -0.49 0.0291
2016-05-13 2016-03-31 13F BOSTON PROPERTIES COM 101121101 27,113 -261 -0.95 3,446 -1.29 0.0298
2016-02-16 2015-12-31 13F BOSTON PROPERTIES COM 101121101 27,374 805 3.03 3,491 10.97 0.0306
2015-11-13 2015-09-30 13F BOSTON PROPERTIES COM 101121101 26,569 -966 -3.51 3,146 -5.61 0.0292
2015-08-14 2015-06-30 13F BOSTON PROPERTIES COM 101121101 27,535 -2,182 -7.34 3,333 -20.17 0.0291
2015-05-14 2015-03-31 13F BOSTON PROPERTIES COM 101121101 29,717 -1,929 -6.10 4,175 2.50 0.0361
2015-02-13 2014-12-31 13F BOSTON PROPERTIES COM 101121101 31,646 -565 -1.75 4,073 9.22 0.0348
2014-11-17 2014-09-30 13F BOSTON PROPERTIES COM 101121101 32,211 -1,646 -4.86 3,729 -6.80 0.0340
2014-08-14 2014-06-30 13F BOSTON PROPERTIES COM 101121101 33,857 -1,710 -4.81 4,001 -1.77 0.0362
2014-05-15 2014-03-31 13F BOSTON PROPERTIES COM 101121101 35,567 5 0.01 4,073 14.12 0.0383
2014-02-14 2013-12-31 13F BOSTON PROPERTIES COM 101121101 35,562 650 1.86 3,569 -4.37 0.0345
2013-11-14 2013-09-30 13F BOSTON PROPERTIES COM 101121101 34,912 -2,806 -7.44 3,732 -6.18 0.0385
2013-08-14 2013-06-30 13F BOSTON PROPERTIES COM 101121101 37,718 37,718 3,978 0.0424
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.