波士頓地產公司
MX ˙ BMV ˙ US1011211018
SecurityMX:BXP / Boston Properties, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership326,082 shares
Latest Disclosed Value $ 16,923,588
Rhumbline Advisers reports 0.73% decrease in ownership of BXP / Boston Properties, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 326,082 shares of Boston Properties, Inc. (MX:BXP) valued at $16,923,588 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 328,473 shares of Boston Properties, Inc.. This represents a change in shares of -0.73% 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)
2026-05-12 2026-03-31 13F BXP COM 101121101 326,082 -2,391 -0.73 16,924 -23.65 0.0145
2026-02-13 2025-12-31 13F BXP COM 101121101 328,473 -1,235 -0.37 22,165 -9.57 0.0179
2025-11-06 2025-09-30 13F BXP COM 101121101 329,708 -6,885 -2.05 24,510 7.93 0.0197
2025-08-12 2025-06-30 13F BXP COM 101121101 336,593 9,824 3.01 22,710 3.43 0.0194
2025-05-29 2025-03-31 13F/A-1 BXP COM 101121101 326,769 37,865 13.11 21,956 2.20 0.0205
2025-04-08 2025-03-31 13F BXP COM 101121101 326,769 37,865 21,956 0.0205
2025-05-29 2024-12-31 13F/A-1 BXP COM 101121101 288,904 -1,483 -0.51 21,483 -8.06 0.0192
2025-01-30 2024-12-31 13F BXP COM 101121101 288,904 -1,483 21,483 0.0192
2024-11-12 2024-09-30 13F BXP COM 101121101 290,387 -11,942 -3.95 23,364 25.54 0.0211
2024-08-01 2024-06-30 13F BXP COM 101121101 302,329 1,356 0.45 18,611 -5.32 0.0175
2024-05-09 2024-03-31 13F BSTN PPTYS COM 101121101 300,973 724 0.24 19,656 -6.70 0.0189
2024-02-08 2023-12-31 13F BSTN PPTYS COM 101121101 300,249 -2,325 -0.77 21,068 17.06 0.0221
2023-11-09 2023-09-30 13F BSTN PPTYS COM 101121101 302,574 -829 -0.27 17,997 3.00 0.0209
2023-08-08 2023-06-30 13F BSTN PPTYS COM 101121101 303,403 -2,100 -0.69 17,473 109,100.00 0.0196
2023-05-11 2023-03-31 13F BSTN PPTYS COM 101121101 305,503 -777 -0.25 17 -99.92 0.0204
2023-02-14 2022-12-31 13F BSTN PPTYS COM 101121101 306,280 5,288 1.76 20,698 -8.27 0.0278
2022-11-10 2022-09-30 13F BSTN PPTYS COM 101121101 300,992 9,749 3.35 22,565 -12.93 0.0336
2022-08-11 2022-06-30 13F BSTN PPTYS COM 101121101 291,243 25,127 9.44 25,915 -24.39 0.0378
2022-05-12 2022-03-31 13F BSTN PPTYS COM 101121101 266,116 6,783 2.62 34,276 14.75 0.0441
2022-02-10 2021-12-31 13F BSTN PPTYS COM 101121101 259,333 1,439 0.56 29,870 6.90 0.0366
2021-11-12 2021-09-30 13F BSTN PPTYS COM 101121101 257,894 -4,973 -1.89 27,943 -7.23 0.0378
2021-08-05 2021-06-30 13F BSTN PPTYS COM 101121101 262,867 -9,817 -3.60 30,122 9.09 0.0395
2021-05-06 2021-03-31 13F BSTN PPTYS COM 101121101 272,684 -12,617 -4.42 27,612 2.38 0.0375
2021-02-10 2020-12-31 13F BSTN PPTYS COM 101121101 285,301 -1,017 -0.36 26,970 17.31 0.0372
2020-11-12 2020-09-30 13F BSTN PPTYS COM 101121101 286,318 -3,367 -1.16 22,991 -12.19 0.0360
2020-08-13 2020-06-30 13F BSTN PPTYS COM 101121101 289,685 2,697 0.94 26,182 -1.08 0.0437
2020-05-06 2020-03-31 13F BSTN PPTYS COM 101121101 286,988 23,143 8.77 26,469 -27.23 0.0555
2020-02-05 2019-12-31 13F BSTN PPTYS COM 101121101 263,845 7,835 3.06 36,374 9.58 0.0608
2019-10-23 2019-09-30 13F BSTN PPTYS COM 101121101 256,010 718 0.28 33,194 0.79 0.0607
2019-08-14 2019-06-30 13F BSTN PPTYS COM 101121101 255,292 2,981 1.18 32,933 -2.50 0.0618
2019-05-01 2019-03-31 13F BSTN PPTYS COM 101121101 252,311 -26,681 -9.56 33,779 7.57 0.0654
2019-01-31 2018-12-31 13F BSTN PPTYS COM 101121101 278,992 1,002 0.36 31,401 -8.23 0.0683
2018-11-07 2018-09-30 13F BSTN PPTYS COM 101121101 277,990 -11,471 -3.96 34,218 -5.75 0.0661
2018-08-06 2018-06-30 13F BSTN PPTYS COM 101121101 289,461 -4,409 -1.50 36,304 0.26 0.0732
2018-05-02 2018-03-31 13F BSTN PPTYS COM 101121101 293,870 -5,093 -1.70 36,211 -6.85 0.0756
2018-02-09 2017-12-31 13F BSTN PPTYS COM 101121101 298,963 3,262 1.10 38,874 6.98 0.0790
2017-11-06 2017-09-30 13F BSTN PPTYS COM 101121101 295,701 -2,366 -0.79 36,336 -0.91 0.0790
2017-08-02 2017-06-30 13F BSTN PPTYS COM 101121101 298,067 -307 -0.10 36,668 -7.19 0.0837
2017-05-02 2017-03-31 13F BSTN PPTYS COM 101121101 298,374 -5,259 -1.73 39,508 3.45 0.0923
2017-01-27 2016-12-31 13F BSTN PPTYS COM 101121101 303,633 24,890 8.93 38,191 0.53 0.0968
2016-11-08 2016-09-30 13F BSTN PPTYS COM 101121101 278,743 38,501 16.03 37,990 19.89 0.1047
2016-08-11 2016-06-30 13F BSTN PPTYS COM 101121101 240,242 -8,802 -3.53 31,688 0.12 0.0939
2016-05-02 2016-03-31 13F BOSTON PROPERTIES INC REIT USD COM 101121101 249,044 3,145 1.28 31,649 0.92 0.0982
2016-02-03 2015-12-31 13F BOSTON PROPERTIES INC REIT USD COM 101121101 245,899 -1,238 -0.50 31,362 7.18 0.1009
2015-11-04 2015-09-30 13F BOSTON PROPERTIES INC REIT USD COM 101121101 247,137 -176 -0.07 29,261 -2.25 0.0995
2015-08-04 2015-06-30 13F BOSTON PROPERTIES INC REIT USD COM 101121101 247,313 40,493 19.58 29,935 3.03 0.0954
2015-05-12 2015-03-31 13F BOSTON PROPERTIES INC REIT USD COM 101121101 206,820 -470 -0.23 29,054 8.91 0.0838
2015-02-06 2014-12-31 13F BOSTON PROPERTIES INC REIT USD COM 101121101 207,290 395 0.19 26,676 11.38 0.0775
2014-11-12 2014-09-30 13F BOSTON PROPERTIES INC REIT USD COM 101121101 206,895 -7,873 -3.67 23,950 -5.64 0.0719
2014-08-06 2014-06-30 13F BOSTON PROPERTIES INC REIT USD COM 101121101 214,768 -8,289 -3.72 25,381 -0.65 0.0745
2014-05-06 2014-03-31 13F BOSTON PROPERTIES INC REIT USD COM 101121101 223,057 -6,514 -2.84 25,547 10.87 0.0758
2014-02-03 2013-12-31 13F BOSTON PROPERTIES INC REIT USD COM 101121101 229,571 -9,800 -4.09 23,042 -9.95 0.0680
2013-11-05 2013-09-30 13F BOSTON PROPERTIES INC REIT USD COM 101121101 239,371 1,885 0.79 25,589 2.16 0.0793
2013-08-07 2013-06-30 13F BOSTON PROPERTIES INC REIT USD COM 101121101 237,486 237,486 25,048 0.0805
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.