보스턴 프로퍼티, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionBoston Partners
Latest Disclosed Ownership36,920 shares
Latest Disclosed Value $ 1,917,498
Boston Partners reports 98.94% decrease in ownership of BXP / Boston Properties, Inc.

On May 11, 2026 - Boston Partners filed a 13F-HR form disclosing ownership of 36,920 shares of Boston Properties, Inc. (US:BXP) valued at $1,916,148 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,473,377 shares of Boston Properties, Inc.. This represents a change in shares of -98.94% during the quarter. The current value of the position is $2,290,886 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)
2026-05-11 2026-03-31 13F BXP COM 101121101 36,920 -3,436,457 -98.94 1,917 -99.18 0.0009
2026-02-13 2025-12-31 13F BXP COM 101121101 3,473,377 -64,974 -1.84 234,375 -10.89 0.2427
2025-11-13 2025-09-30 13F BXP COM 101121101 3,538,351 529,158 17.58 263,031 29.56 0.2701
2025-08-12 2025-06-30 13F/A-1 BXP COM 101121101 3,009,193 403,090 15.47 203,020 15.96 0.2255
2025-08-07 2025-06-30 13F BXP COM 101121101 3,009,193 403,090 203,020 0.0932
2025-05-13 2025-03-31 13F BXP COM 101121101 2,606,103 2,606,103 175,083 0.2117
2021-02-10 2020-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 0 -1,331,668 -100.00 0 -100.00
2020-11-13 2020-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 1,331,668 -518,897 -28.04 106,934 -36.07 0.1947
2020-11-09 2020-09-30 13F BOSTON PROPERTIES COM 101121101 1,850,565 0 167,262 122,790.2326
2020-08-12 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP COM 101121101 1,850,565 -410,965 -18.17 167,262 -19.79 0.3072
2020-05-13 2020-03-31 13F BOSTON PROPERTIES COM 101121101 2,261,530 5,573 0.25 208,525 -32.95 0.4141
2020-02-06 2019-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 2,255,957 91,778 4.24 310,987 10.80 0.4113
2020-02-05 2019-12-31 13F BOSTON PROPERTIES COM 101121101 2,255,957 91,778 310,987 174,845.9744
2019-11-20 2019-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 2,164,179 -89,943 -3.99 280,667 -3.49 0.3801
2019-11-08 2019-09-30 13F BOSTON PROPERTIES COM 101121101 2,253,300 -822 290,740 0.3845
2019-08-26 2019-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 2,254,122 -122,124 -5.14 290,808 -8.59 0.3814
2019-08-09 2019-06-30 13F BOSTON PROPERTIES COM 101121101 2,254,208 -122,038 290,819
2019-05-13 2019-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 2,376,246 20,692 0.88 318,132 20.00 0.4215
2019-05-03 2019-03-31 13F BOSTON PROPERTIES COM 101121101 2,376,246 20,692 318,132
2019-02-07 2018-12-31 13F BOSTON PROPERTIES COM 101121101 2,355,554 61,370 2.68 265,117 -6.12 0.3809
2018-11-14 2018-09-30 13F BOSTON PROPERTIES COM 101121101 2,294,184 139,884 6.49 282,391 4.51 0.3281
2018-08-03 2018-06-30 13F BOSTON PROPERTIES COM 101121101 2,154,300 54,601 2.60 270,192 4.43 0.3238
2018-05-04 2018-03-31 13F BOSTON PROPERTIES COM 101121101 2,099,699 -576,015 -21.53 258,725 -25.64 0.3120
2018-02-14 2017-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 2,675,714 98,927 3.84 347,923 9.88 0.4099
2018-02-01 2017-12-31 13F BOSTON PROPERTIES COM 101121101 2,675,714 98,927 347,923
2017-11-02 2017-09-30 13F BOSTON PROPERTIES COM 101121101 2,576,787 9,060 0.35 316,636 0.24 0.3912
2017-08-02 2017-06-30 13F BOSTON PROPERTIES COM 101121101 2,567,727 102,358 4.15 315,881 -3.23 0.4017
2017-05-03 2017-03-31 13F BOSTON PROPERTIES COM 101121101 2,465,369 279,690 12.80 326,440 18.74 0.4168
2017-02-06 2016-12-31 13F BOSTON PROPERTIES COM 101121101 2,185,679 226,411 11.56 274,915 2.95 0.3615
2016-11-09 2016-09-30 13F BOSTON PROPERTIES COM 101121101 1,959,268 -9,003 -0.46 267,029 2.86 0.3734
2016-08-05 2016-06-30 13F BOSTON PROPERTIES COM 101121101 1,968,271 201,482 11.40 259,615 15.63 0.3751
2016-05-12 2016-03-31 13F BOSTON PROPERTIES COM 101121101 1,766,789 -131,447 -6.92 224,523 -7.26 0.3307
2016-02-08 2015-12-31 13F BOSTON PROPERTIES COM 101121101 1,898,236 -342,046 -15.27 242,101 -8.73 0.3468
2015-11-10 2015-09-30 13F BOSTON PROPERTIES COM 101121101 2,240,282 200,904 9.85 265,249 7.46 0.4043
2015-08-10 2015-06-30 13F BOSTON PROPERTIES COM 101121101 2,039,378 342,599 20.19 246,846 3.56 0.3546
2015-05-05 2015-03-31 13F BOSTON PROPERTIES COM 101121101 1,696,779 149,403 9.66 238,364 19.70 0.3549
2015-02-09 2014-12-31 13F BOSTON PROPERTIES COM 101121101 1,547,376 119,952 8.40 199,131 20.51 0.2989
2014-11-12 2014-09-30 13F BOSTON PROPERTIES COM 101121101 1,427,424 83,307 6.20 165,239 4.02 0.2682
2014-08-08 2014-06-30 13F BOSTON PROPERTIES COM 101121101 1,344,117 170,279 14.51 158,848 18.16 0.2660
2014-05-07 2014-03-31 13F BOSTON PROPERTIES COM 101121101 1,173,838 242,152 25.99 134,440 43.77 0.2452
2014-02-06 2013-12-31 13F BOSTON PROPERTIES COM 101121101 931,686 208,906 28.90 93,513 21.03 0.1917
2013-11-12 2013-09-30 13F BOSTON PROPERTIES COM 101121101 722,780 435,006 151.16 77,265 154.56 0.1863
2013-08-01 2013-06-30 13F BOSTON PROPERTIES COM 101121101 287,774 287,774 30,352 0.0836
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.