보스턴 프로퍼티, Inc.
MX ˙ BMV ˙ US1011211018
SecurityMX:BXP / Boston Properties, Inc.
InstitutionAmeriprise Financial Inc
Latest Disclosed Ownership719,269 shares
Latest Disclosed Value $ 34,884,401
Ameriprise Financial Inc reports 29.19% decrease in ownership of BXP / Boston Properties, Inc.

On May 15, 2026 - Ameriprise Financial Inc filed a 13F-HR form disclosing ownership of 719,269 shares of Boston Properties, Inc. (MX:BXP) valued at $34,884,401 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,015,821 shares of Boston Properties, Inc.. This represents a change in shares of -29.19% 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)
2026-05-15 2026-03-31 13F BXP COM 101121101 719,269 -296,552 -29.19 34,884 -47.64 0.0015
2026-02-17 2025-12-31 13F BXP COM 101121101 1,015,821 -45,326 -4.27 66,624 -13.85 0.0151
2025-11-14 2025-09-30 13F BXP COM 101121101 1,061,147 -63,576 -5.65 77,338 6.26 0.0178
2025-08-14 2025-06-30 13F BXP COM 101121101 1,124,723 -394,569 -25.97 72,786 -28.40 0.0179
2025-05-14 2025-03-31 13F BXP COM 101121101 1,519,292 12,703 0.84 101,656 -9.08 0.0274
2025-02-14 2024-12-31 13F BXP COM 101121101 1,506,589 -411,194 -21.44 111,809 -26.57 0.0287
2024-11-14 2024-09-30 13F BXP COM 101121101 1,917,783 370,236 23.92 152,270 62.35 0.0391
2024-08-14 2024-06-30 13F BOSTON PROPERTIES COM 101121101 1,547,547 -138,240 -8.20 93,794 -14.39 0.0254
2024-05-15 2024-03-31 13F BOSTON PROPERTIES COM 101121101 1,685,787 -532,157 -23.99 109,554 -28.47 0.0302
2024-02-14 2023-12-31 13F BOSTON PROPERTIES COM 101121101 2,217,944 260,889 13.33 153,151 35.56 0.0459
2023-11-14 2023-09-30 13F BOSTON PROPERTIES COM 101121101 1,957,055 906,069 86.21 112,977 86.51 0.0371
2023-08-14 2023-06-30 13F BOSTON PROPERTIES COM 101121101 1,050,986 980,695 1,395.19 60,574 1,482.37 0.0190
2023-05-22 2023-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 70,291 27,021 62.45 3,828 30.47 0.0013
2023-05-15 2023-03-31 13F BOSTON PROPERTIES COM 101121101 70,291 27,021 3,828 0.0002
2023-02-14 2022-12-31 13F BOSTON PROPERTIES COM 101121101 43,270 -102,480 -70.31 2,934 -39.77 0.0010
2022-11-14 2022-09-30 13F BOSTON PROPERTIES COM 101121101 145,750 53,719 58.37 4,871 2.14 0.0018
2022-08-15 2022-06-30 13F BOSTON PROPERTIES COM 101121101 92,031 8,927 10.74 4,769 -31.97 0.0017
2022-05-16 2022-03-31 13F BOSTON PROPERTIES COM 101121101 83,104 6,491 8.47 7,010 22.34 0.0021
2022-02-14 2021-12-31 13F BOSTON PROPERTIES COM 101121101 76,613 32,603 74.08 5,730 19.82 0.0016
2021-11-15 2021-09-30 13F BOSTON PROPERTIES COM 101121101 44,010 -7,264 -14.17 4,782 -18.80 0.0015
2021-08-16 2021-06-30 13F BOSTON PROPERTIES COM 101121101 51,274 -2,062 -3.87 5,889 8.77 0.0018
2021-05-17 2021-03-31 13F BOSTON PROPERTIES COM 101121101 53,336 -5,154 -8.81 5,414 -2.24 0.0018
2021-02-12 2020-12-31 13F BOSTON PROPERTIES COM 101121101 58,490 -198,326 -77.22 5,538 -73.16 0.0020
2020-11-16 2020-09-30 13F BOSTON PROPERTIES COM 101121101 256,816 -63,775 -19.89 20,636 -28.26 0.0084
2020-08-14 2020-06-30 13F BOSTON PROPERTIES COM 101121101 320,591 79,062 32.73 28,765 29.04 0.0123
2020-05-15 2020-03-31 13F BOSTON PROPERTIES COM 101121101 241,529 66,534 38.02 22,292 -7.66 0.0117
2020-02-14 2019-12-31 13F BOSTON PROPERTIES COM 101121101 174,995 26,380 17.75 24,140 25.19 0.0100
2019-11-14 2019-09-30 13F BOSTON PROPERTIES COM 101121101 148,615 26,067 21.27 19,282 21.86 0.0086
2019-08-14 2019-06-30 13F BOSTON PROPERTIES COM 101121101 122,548 -8,973 -6.82 15,823 -10.20 0.0071
2019-05-15 2019-03-31 13F BOSTON PROPERTIES COM 101121101 131,521 -24,070 -15.47 17,620 0.54 0.0081
2019-02-14 2018-12-31 13F BOSTON PROPERTIES COM 101121101 155,591 -60,190 -27.89 17,525 -34.06 0.0088
2018-11-14 2018-09-30 13F BOSTON PROPERTIES IN COM 101121101 215,781 -301,849 -58.31 26,578 -59.07 0.0093
2018-08-14 2018-06-30 13F BOSTON PROPERTIES COM 101121101 517,630 46,114 9.78 64,940 11.74 0.0287
2018-05-14 2018-03-31 13F BOSTON PROPERTIES COM 101121101 471,516 -105,347 -18.26 58,115 -22.54 0.0263
2018-02-12 2017-12-31 13F BOSTON PROPERTIES COM 101121101 576,863 -44,167 -7.11 75,025 -1.70 0.0342
2017-11-07 2017-09-30 13F BOSTON PROPERTIES COM 101121101 621,030 393,612 173.08 76,326 172.67 0.0363
2017-08-10 2017-06-30 13F BOSTON PROPERTIES COM 101121101 227,418 -27,428 -10.76 27,992 -17.09 0.0140
2017-05-05 2017-03-31 13F BOSTON PROPERTIES COM 101121101 254,846 -34,502 -11.92 33,761 -7.28 0.0175
2017-02-03 2016-12-31 13F BOSTON PROPERTIES COM 101121101 289,348 34,085 13.35 36,410 4.62 0.0199
2016-11-08 2016-09-30 13F BOSTON PROPERTIES COM 101121101 255,263 75,380 41.91 34,803 46.60 0.0195
2016-08-08 2016-06-30 13F BOSTON PROPERTIES COM 101121101 179,883 3,301 1.87 23,740 5.72 0.0139
2016-05-12 2016-03-31 13F BOSTON PROPERTIES COM 101121101 176,582 -41,202 -18.92 22,455 -18.90 0.0134
2016-02-11 2015-12-31 13F BOSTON PROPERTIES COM 101121101 217,784 576 0.27 27,689 7.73 0.0163
2015-11-12 2015-09-30 13F BOSTON PROPERTIES COM 101121101 217,208 11,389 5.53 25,703 3.10 0.0159
2015-08-13 2015-06-30 13F BOSTON PROPERTIES COM 101121101 205,819 37,917 22.58 24,931 5.61 0.0142
2015-05-14 2015-03-31 13F BOSTON PROPERTIES COM 101121101 167,902 7,659 4.78 23,607 13.69 0.0135
2015-02-13 2014-12-31 13F BOSTON PROPERTIES COM 101121101 160,243 3,261 2.08 20,764 14.16 0.0121
2014-11-14 2014-09-30 13F BOSTON PROPERTIES COM 101121101 156,982 -30,507 -16.27 18,189 -17.97 0.0109
2014-08-13 2014-06-30 13F BOSTON PROPERTIES COM 101121101 187,489 -6,662 -3.43 22,173 -0.36 0.0131
2014-05-14 2014-03-31 13F BOSTON PROPERTIES COM 101121101 194,151 104 0.05 22,252 13.89 0.0134
2014-02-14 2013-12-31 13F BOSTON PROPERTIES COM 101121101 194,047 62,911 47.97 19,539 39.21 0.0118
2013-11-14 2013-09-30 13F BOSTON PROPERTIES COM 101121101 131,136 -22,330 -14.55 14,036 -13.37 0.0092
2013-08-14 2013-06-30 13F BOSTON PROPERTIES COM 101121101 153,466 153,466 16,202 0.0112
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.