Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionNorthwestern Mutual Wealth Management Co
Latest Disclosed Ownership1,418 shares
Latest Disclosed Value $ 73,594
Northwestern Mutual Wealth Management Co reports 82.82% decrease in ownership of BXP / Boston Properties, Inc.

On May 7, 2026 - Northwestern Mutual Wealth Management Co filed a 13F-HR form disclosing ownership of 1,418 shares of Boston Properties, Inc. (US:BXP) valued at $73,594 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 10, 2026 disclosing 8,253 shares of Boston Properties, Inc.. This represents a change in shares of -82.82% during the quarter. The current value of the position is $88,384 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)
2026-05-07 2026-03-31 13F BXP COM 101121101 1,418 -6,835 -82.82 74 -86.87 0.0000
2026-02-10 2025-12-31 13F/A-1 BXP COM 101121101 8,253 248 3.10 557 -6.55 0.0004
2026-02-05 2025-12-31 13F BXP COM 101121101 212,549 204,544 71,027 0.0448
2025-11-14 2025-09-30 13F BXP COM 101121101 8,005 4,297 115.88 595 138.00 0.0004
2025-08-13 2025-06-30 13F BXP COM 101121101 3,708 91 2.52 250 2.88 0.0002
2025-05-14 2025-03-31 13F BXP COM 101121101 3,617 -19 -0.52 243 -10.00 0.0002
2025-02-11 2024-12-31 13F BXP COM 101121101 3,636 226 6.63 270 -1.46 0.0002
2024-11-12 2024-09-30 13F BXP COM 101121101 3,410 1,972 137.13 274 211.36 0.0002
2024-08-16 2024-06-30 13F BOSTON PROPERTIES COM 101121101 1,438 547 61.39 89 51.72 0.0001
2024-05-15 2024-03-31 13F BOSTON PROPERTIES COM 101121101 891 385 76.09 58 65.71 0.0001
2024-02-13 2023-12-31 13F BOSTON PROPERTIES COM 101121101 506 0 0.00 36 16.67 0.0000
2023-11-14 2023-09-30 13F BOSTON PROPERTIES COM 101121101 506 -52 -9.32 30 -6.25 0.0000
2023-08-14 2023-06-30 13F BOSTON PROPERTIES COM 101121101 558 -83 -12.95 32 -5.88 0.0000
2023-05-15 2023-03-31 13F BOSTON PROPERTIES COM 101121101 641 -1,369 -68.11 35 -74.81 0.0000
2023-02-21 2022-12-31 13F BOSTON PROPERTIES COM 101121101 2,010 -697 -25.75 136 -33.50 0.0002
2022-11-14 2022-09-30 13F BOSTON PROPERTIES COM 101121101 2,707 -331 -10.90 203 -25.09 0.0004
2022-08-04 2022-06-30 13F BOSTON PROPERTIES COM 101121101 3,038 -1,785 -37.01 271 -56.43 0.0005
2022-05-09 2022-03-31 13F BOSTON PROPERTIES COM 101121101 4,823 -506 -9.50 622 1.30 0.0010
2022-02-03 2021-12-31 13F BOSTON PROPERTIES COM 101121101 5,329 -1,855 -25.82 614 -21.18 0.0010
2021-11-15 2021-09-30 13F BOSTON PROPERTIES COM 101121101 7,184 -56 -0.77 779 -6.14 0.0014
2021-08-13 2021-06-30 13F BOSTON PROPERTIES COM 101121101 7,240 1,567 27.62 830 44.35 0.0016
2021-05-14 2021-03-31 13F BOSTON PROPERTIES COM 101121101 5,673 1,843 48.12 575 58.84 0.0012
2021-02-12 2020-12-31 13F BOSTON PROPERTIES COM 101121101 3,830 1,087 39.63 362 63.80 0.0008
2020-11-13 2020-09-30 13F BOSTON PROPERTIES COM 101121101 2,743 -87 -3.07 221 -13.67 0.0006
2020-08-14 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP COM 101121101 2,830 -4 -0.14 256 -1.92 0.0008
2020-05-08 2020-03-31 13F BOSTON PROPERTIES COM 101121101 2,834 -1,304 -31.51 261 -54.29 0.0010
2020-02-13 2019-12-31 13F BOSTON PROPERTIES COM 101121101 4,138 157 3.94 571 10.66 0.0019
2019-11-12 2019-09-30 13F BOSTON PROPERTIES COM 101121101 3,981 19 0.48 516 0.98 0.0020
2019-08-12 2019-06-30 13F BOSTON PROPERTIES COM 101121101 3,962 -87 -2.15 511 -5.72 0.0021
2019-05-10 2019-03-31 13F BOSTON PROPERTIES COM 101121101 4,049 -97 -2.34 542 16.31 0.0024
2019-02-12 2018-12-31 13F BOSTON PROPERTIES COM 101121101 4,146 -87 -2.06 466 -10.56 0.0023
2018-11-01 2018-09-30 13F BOSTON PROPERTIES COM 101121101 4,233 -43 -1.01 521 -2.80 0.0026
2018-08-10 2018-06-30 13F BOSTON PROPERTIES COM 101121101 4,276 94 2.25 536 4.08 0.0030
2018-05-14 2018-03-31 13F BOSTON PROPERTIES COM 101121101 4,182 -82 -1.92 515 -7.04 0.0031
2018-01-31 2017-12-31 13F BOSTON PROPERTIES COM 101121101 4,264 607 16.60 554 23.11 0.0035
2017-11-07 2017-09-30 13F BOSTON PROPERTIES COM 101121101 3,657 83 2.32 450 2.27 0.0032
2017-08-10 2017-06-30 13F BOSTON PROPERTIES COM 101121101 3,574 61 1.74 440 -5.38 0.0035
2017-05-09 2017-03-31 13F BOSTON PROPERTIES COM 101121101 3,513 -90 -2.50 465 2.65 0.0042
2017-02-15 2016-12-31 13F BOSTON PROPERTIES COM 101121101 3,603 2,084 137.20 453 118.84 0.0049
2016-11-14 2016-09-30 13F BOSTON PROPERTIES COM 101121101 1,519 1,041 217.78 207 228.57 0.0032
2016-08-29 2016-06-30 13F BOSTON PROPERTIES COM 101121101 478 38 8.64 63 12.50 0.0009
2016-05-16 2016-03-31 13F BOSTON PROPERTIES COM 101121101 440 41 10.28 56 9.80 0.0009
2016-02-16 2015-12-31 13F BOSTON PROPERTIES COM 101121101 399 -132 -24.86 51 -19.05 0.0010
2015-11-16 2015-09-30 13F BOSTON PROPERTIES COM 101121101 531 -45 -7.81 63 -10.00 0.0015
2015-09-30 2015-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 576 0 0.00 70 -13.58 0.0018
2015-08-14 2015-06-30 13F BOSTON PROPERTIES COM 101121101 576 81
2015-05-15 2015-03-31 13F BOSTON PROPERTIES COM 101121101 576 3 0.52 81 9.46 0.0023
2015-02-13 2014-12-31 13F BOSTON PROPERTIES COM 101121101 573 246 75.23 74 94.74 0.0023
2014-11-14 2014-09-30 13F BOSTON PROPERTIES COM 101121101 327 77 30.80 38 26.67 0.0013
2014-08-05 2014-06-30 13F BOSTON PROPERTIES COM 101121101 250 -76 -23.31 30 -18.92 0.0012
2014-05-15 2014-03-31 13F BOSTON PROPERTIES COM 101121101 326 2 0.62 37 12.12 0.0015
2014-02-14 2013-12-31 13F BOSTON PROPERTIES COM 101121101 324 151 87.28 33 73.68 0.0015
2013-11-14 2013-09-30 13F BOSTON PROPERTIES COM 101121101 173 100 136.99 19 137.50 0.0010
2013-08-21 2013-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 73 73 8 0.0005
2013-08-14 2013-06-30 13F BOSTON PROPERTIES COM 101121101 37,020 3,904 0.0429
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.