Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionAmalgamated Bank
Latest Disclosed Ownership27,392 shares
Latest Disclosed Value $ 1,422
Amalgamated Bank reports 3.92% decrease in ownership of BXP / Boston Properties, Inc.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 27,392 shares of Boston Properties, Inc. (US:BXP) valued at $1,421,645 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 28,511 shares of Boston Properties, Inc.. This represents a change in shares of -3.92% during the quarter. The current value of the position is $1,668,173 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)
2026-05-08 2026-03-31 13F BXP INC COM COM 101121101 27,392 -1,119 -3.92 1 0.00 0.0109
2026-02-05 2025-12-31 13F BXP INC COM COM 101121101 28,511 12 0.04 2 -50.00 0.0139
2025-10-29 2025-09-30 13F BXP INC COM COM 101121101 28,499 -280 -0.97 2 100.00 0.0151
2025-08-04 2025-06-30 13F BXP INC COM COM 101121101 28,779 -51 -0.18 2 0.00 0.0150
2025-04-25 2025-03-31 13F BXP INC COM COM 101121101 28,830 93 0.32 2 -50.00 0.0166
2025-02-04 2024-12-31 13F BXP INC COM COM 101121101 28,737 -428 -1.47 2 0.00 0.0175
2024-10-30 2024-09-30 13F BXP INC COM COM 101121101 29,165 -13,323 -31.36 2 0.00 0.0193
2024-08-12 2024-06-30 13F BXP INC COM COM 101121101 42,488 -9,616 -18.46 3 -33.33 0.0223
2024-04-23 2024-03-31 13F BOSTON PPTYS COM 101121101 52,104 7,379 16.50 3 0.00 0.0291
2024-02-06 2023-12-31 13F BOSTON PPTYS COM 101121101 44,725 -1,578 -3.41 3 50.00 0.0250
2023-11-08 2023-09-30 13F BOSTON PPTYS COM 101121101 46,303 134 0.29 3 0.00 0.0234
2023-08-11 2023-06-30 13F BOSTON PPTYS COM 101121101 46,169 7,982 20.90 3 0.00 0.0215
2023-05-02 2023-03-31 13F BOSTON PPTYS COM 101121101 38,187 47 0.12 2 0.00 0.0176
2023-02-10 2022-12-31 13F BOSTON PPTYS COM 101121101 38,140 728 1.95 3 -99.93 0.0230
2022-11-09 2022-09-30 13F BOSTON PPTYS COM 101121101 37,412 -1,132 -2.94 2,805 -18.22 0.0271
2022-08-15 2022-06-30 13F BOSTON PPTYS COM 101121101 38,544 1,498 4.04 3,430 -28.12 0.0320
2022-08-25 2022-03-31 13F/A-1 BOSTON PPTYS COM 101121101 37,046 -2,620 -6.61 4,772 4.44 0.0371
2022-06-30 2022-03-31 13F BOSTON PPTYS COM 101121101 37,046 -2,620 4,772 0.0379
2022-02-15 2021-12-31 13F/A-1 BOSTON PPTYS COM 101121101 39,666 -1,311 -3.20 4,569 2.91 0.0337
2022-02-15 2021-12-31 13F BOSTON PPTYS COM 101121101 39,666 -1,311 4,569 0.0337
2021-10-29 2021-09-30 13F BOSTON PPTYS COM 101121101 40,977 -1,521 -3.58 4,440 -8.83 0.0375
2021-08-16 2021-06-30 13F BOSTON PPTYS COM 101121101 42,498 34,173 410.49 4,870 477.70 0.0390
2021-05-13 2021-03-31 13F BOSTON PPTYS COM 101121101 8,325 -314 -3.63 843 3.18 0.0316
2021-02-12 2020-12-31 13F BOSTON PPTYS COM 101121101 8,639 -19 -0.22 817 17.55 0.0310
2020-10-30 2020-09-30 13F BOSTON PPTYS COM 101121101 8,658 -212 -2.39 695 -13.34 0.0302
2020-08-10 2020-06-30 13F BOSTON PPTYS COM 101121101 8,870 -13,568 -60.47 802 -61.24 0.0371
2020-05-13 2020-03-31 13F BOSTON PPTYS COM 101121101 22,438 -867 -3.72 2,069 -35.61 0.0506
2020-02-13 2019-12-31 13F BOSTON PPTYS COM 101121101 23,305 1,563 7.19 3,213 13.98 0.0591
2019-11-13 2019-09-30 13F BOSTON PPTYS COM 101121101 21,742 -438 -1.97 2,819 -1.47 0.0593
2019-08-14 2019-06-30 13F BOSTON PPTYS COM 101121101 22,180 2,603 13.30 2,861 9.16 0.0668
2019-05-15 2019-03-31 13F BOSTON PPTYS COM 101121101 19,577 548 2.88 2,621 22.36 0.0635
2019-02-15 2018-12-31 13F BOSTON PPTYS COM 101121101 19,029 -381 -1.96 2,142 -10.34 0.0607
2018-11-14 2018-09-30 13F BOSTON PPTYS COM 101121101 19,410 -464 -2.33 2,389 -4.17 0.0591
2018-07-18 2018-06-30 13F BOSTON PPTYS COM 101121101 19,874 203 1.03 2,493 2.85 0.0609
2018-05-22 2018-03-31 13F BOSTON PPTYS COM 101121101 19,671 136 0.70 2,424 -4.57 0.0643
2018-02-13 2017-12-31 13F BOSTON PPTYS COM 101121101 19,535 1,727 9.70 2,540 16.09 0.0687
2017-11-09 2017-09-30 13F BOSTON PPTYS COM 101121101 17,808 352 2.02 2,188 1.91 0.0681
2017-08-10 2017-06-30 13F BOSTON PPTYS COM 101121101 17,456 6,553 60.10 2,147 48.68 0.0704
2017-05-12 2017-03-31 13F BOSTON PPTYS COM 101121101 10,903 -336 -2.99 1,444 2.12 0.0719
2017-02-14 2016-12-31 13F BOSTON PPTYS COM 101121101 11,239 2,909 34.92 1,414 24.58 0.0639
2016-11-15 2016-09-30 13F/A-1 BOSTON PPTYS COM 101121101 8,330 43 0.52 1,135 -3.81 0.0659
2016-11-14 2016-09-30 13F BOSTON PPTYS COM 101121101 3,382 461
2016-08-16 2016-06-30 13F BOSTON PPTYS COM 101121101 8,287 2,245 37.16 1,180 53.65 0.0683
2016-05-11 2016-03-31 13F BOSTON PPTYS COM 101121101 6,042 1,450 31.58 768 31.06 0.0748
2016-02-10 2015-12-31 13F BOSTON PPTYS COM 101121101 4,592 -1,194 -20.64 586 -14.45 0.0723
2015-11-04 2015-09-30 13F BOSTON PPTYS COM 101121101 5,786 211 3.78 685 1.48 0.0719
2015-07-10 2015-06-30 13F BOSTON PPTYS COM 101121101 5,575 645 13.08 675 -2.60 0.0663
2015-04-22 2015-03-31 13F BOSTON PPTYS COM 101121101 4,930 4,930 0.00 693 0.0846
2015-01-29 2014-12-31 13F BOSTON PPTYS COM 101121101 0 -4,289 -100.00 0 -100.00
2014-11-14 2014-09-30 13F BOSTON PPTYS COM 101121101 4,289 58 1.37 496 -0.80 0.0738
2014-08-11 2014-06-30 13F BOSTON PPTYS COM 101121101 4,231 521 14.04 500 17.65 0.0754
2014-05-12 2014-03-31 13F BOSTON PPTYS COM 101121101 3,710 -71 -1.88 425 12.14 0.0732
2014-02-13 2013-12-31 13F BOSTON PPTYS COM 101121101 3,781 3,781 6.48 379 5.57 0.0644
2013-11-14 2013-09-30 13F BOSTON PPTYS COM 101121101 0 0 0 0.0000
2013-08-15 2013-06-30 13F BOSTON PPTYS COM 101121101 0 -3,551 -100.00 0 -100.00
2014-02-13 2013-03-31 13F BOSTON PPTYS COM 101121101 3,551 391 12.37 359 7.49 0.1019
2014-02-11 2012-12-31 13F BOSTON PPTYS COM 101121101 3,160 1,145 56.82 334 49.78 0.1391
2014-02-11 2012-09-30 13F BOSTON PPTYS COM 101121101 2,015 65 3.33 223 5.69 0.1416
2014-02-11 2012-06-30 13F BOSTON PPTYS COM 101121101 1,950 0 0.00 211 2.93 0.1515
2014-02-11 2012-03-31 13F BOSTON PPTYS COM 101121101 1,950 -94 -4.60 205 0.49 0.1424
2014-02-11 2011-12-31 13F BOSTON PPTYS COM 101121101 2,044 136 7.13 204 0.49 0.1466
2014-02-11 2011-06-30 13F BOSTON PPTYS COM 101121101 1,908 1,908 203 0.1470
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.