Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership2,586,323 shares
Latest Disclosed Value $ 134,230,305
Morgan Stanley reports 24.54% decrease in ownership of BXP / Boston Properties, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 2,586,323 shares of Boston Properties, Inc. (US:BXP) valued at $134,230,164 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 3,427,418 shares of Boston Properties, Inc.. This represents a change in shares of -24.54% during the quarter. The current value of the position is $160,481,342 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)
2026-05-15 2026-03-31 13F BXP COM 101121101 2,586,323 -841,095 -24.54 134,230 -41.96 0.0081
2026-05-27 2025-12-31 13F/A-1 BXP COM 101121101 3,427,418 -378,547 -9.95 231,282 -18.26 0.0138
2026-02-13 2025-12-31 13F BXP COM 101121101 3,427,418 -378,547 231,282 0.0138
2026-05-27 2025-09-30 13F/A-1 BXP COM 101121101 3,805,965 984,939 34.91 282,936 48.65 0.0171
2025-11-14 2025-09-30 13F BXP COM 101121101 3,805,965 984,939 282,936 0.0171
2025-08-15 2025-06-30 13F BXP COM 101121101 2,821,026 124,105 4.60 190,335 5.04 0.0124
2025-05-15 2025-03-31 13F BXP COM 101121101 2,696,921 -144,212 -5.08 181,206 -14.23 0.0130
2025-05-15 2024-12-31 13F/A-1 BXP COM 101121101 2,841,133 -161,166 -5.37 211,267 -12.54 0.0148
2025-02-14 2024-12-31 13F BXP COM 101121101 2,841,133 -161,166 211,267 0.0148
2025-05-14 2024-09-30 13F/A-2 BXP COM 101121101 3,002,299 239,904 8.68 241,565 42.05 0.0175
2025-02-14 2024-09-30 13F/A-1 BXP COM 101121101 3,002,299 239,904 241,565 0.0175
2024-11-14 2024-09-30 13F BXP COM 101121101 3,002,299 239,904 241,565 0.0021
2025-05-14 2024-06-30 13F/A-2 BOSTON PROPERTIES COM 101121101 2,762,395 480,760 21.07 170,053 14.12 0.0132
2024-10-17 2024-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 2,762,395 480,760 170,053 0.0132
2024-08-14 2024-06-30 13F BOSTON PROPERTIES COM 101121101 2,762,395 480,760 170,053 0.0132
2024-10-17 2024-03-31 13F/A-2 BOSTON PROPERTIES COM 101121101 2,281,635 83,842 3.81 149,014 -3.38 0.0120
2024-08-16 2024-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 2,281,635 83,842 149,014 0.0014
2024-05-15 2024-03-31 13F BOSTON PROPERTIES COM 101121101 2,281,635 83,842 149,014 0.0120
2024-08-16 2023-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 2,197,793 -285,121 -11.48 154,219 4.43 0.0136
2024-02-13 2023-12-31 13F BOSTON PROPERTIES COM 101121101 2,197,793 -285,121 154,219 0.0136
2023-11-15 2023-09-30 13F BOSTON PROPERTIES COM 101121101 2,482,914 -409,115 -14.15 147,684 -11.33 0.0150
2023-08-14 2023-06-30 13F BOSTON PROPERTIES COM 101121101 2,892,029 1,088,747 60.38 166,552 70.66 0.0164
2023-05-15 2023-03-31 13F BOSTON PROPERTIES COM 101121101 1,803,282 667,884 58.82 97,594 27.19 0.0105
2023-02-14 2022-12-31 13F BOSTON PROPERTIES COM 101121101 1,135,398 -17,517 -1.52 76,730 -11.23 0.0087
2022-11-14 2022-09-30 13F BOSTON PROPERTIES COM 101121101 1,152,915 -174,471 -13.14 86,433 -26.82 0.0118
2022-10-27 2022-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 1,327,386 770,591 138.40 118,112 64.69 0.0153
2022-08-15 2022-06-30 13F BOSTON PROPERTIES COM 101121101 1,327,386 770,591 118,112 0.0153
2022-10-27 2022-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 556,795 46,974 9.21 71,717 22.13 0.0097
2022-05-13 2022-03-31 13F BOSTON PROPERTIES COM 101121101 556,795 46,974 71,717 0.0097
2022-02-14 2021-12-31 13F BOSTON PROPERTIES COM 101121101 509,821 -65,267 -11.35 58,720 -5.76 0.0073
2021-11-15 2021-09-30 13F BOSTON PROPERTIES COM 101121101 575,088 -27,728 -4.60 62,309 -9.80 0.0084
2021-08-23 2021-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 602,816 -217,049 -26.47 69,077 -16.79 0.0091
2021-08-16 2021-06-30 13F BOSTON PROPERTIES COM 101121101 602,816 -217,049 69,077 0.0019
2021-05-17 2021-03-31 13F BOSTON PROPERTIES COM 101121101 819,865 -686,685 -45.58 83,019 -41.71 0.0122
2021-02-16 2020-12-31 13F BOSTON PROPERTIES COM 101121101 1,506,550 -152,815 -9.21 142,414 6.88 0.0220
2020-11-13 2020-09-30 13F BOSTON PROPERTIES COM 101121101 1,659,365 -32,683 -1.93 133,247 -12.87 0.0258
2020-08-14 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP COM 101121101 1,692,048 -42,754 -2.46 152,926 -4.42 0.0338
2020-05-26 2020-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 1,734,802 -342,118 -16.47 160,000 -44.12 0.0435
2020-05-15 2020-03-31 13F BOSTON PROPERTIES COM 101121101 1,734,802 -342,118 160,000 12,291.3354
2020-02-14 2019-12-31 13F BOSTON PROPERTIES COM 101121101 2,076,920 17,948 0.87 286,325 7.25 0.0666
2019-11-14 2019-09-30 13F BOSTON PROPERTIES COM 101121101 2,058,972 -215,508 -9.48 266,967 -9.01 0.0707
2019-08-14 2019-06-30 13F BOSTON PROPERTIES COM 101121101 2,274,480 -327,485 -12.59 293,407 -15.77 0.0781
2019-05-15 2019-03-31 13F BOSTON PROPERTIES COM 101121101 2,601,965 -264,594 -9.23 348,350 7.97 0.0986
2019-02-14 2018-12-31 13F BOSTON PROPERTIES COM 101121101 2,866,559 -222,724 -7.21 322,631 -15.16 0.0965
2019-04-23 2018-09-30 13F/A-2 BOSTON PROPERTIES COM 101121101 3,089,283 -141,434 -4.38 380,260 -6.15 0.0952
2018-11-20 2018-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 3,089,283 0 380,260 0.0952
2018-11-14 2018-09-30 13F BOSTON PROPERTIES COM 101121101 3,089,283 -141,434 380,260
2019-04-23 2018-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 3,230,717 -680,386 -17.40 405,197 -15.92 0.1095
2018-08-14 2018-06-30 13F BOSTON PROPERTIES COM 101121101 3,230,717 -680,386 405,197
2019-04-23 2018-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 3,911,103 214,945 5.82 481,927 0.27 0.1338
2018-05-14 2018-03-31 13F BOSTON PROPERTIES COM 101121101 3,911,103 214,945 481,927
2019-04-23 2017-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 3,696,158 129,029 3.62 480,612 9.65 0.1315
2018-02-14 2017-12-31 13F BOSTON PROPERTIES COM 101121101 3,696,158 129,029 480,612
2017-11-14 2017-09-30 13F BOSTON PROPERTIES COM 101121101 3,567,129 342,569 10.62 438,329 10.50 0.1313
2017-08-11 2017-06-30 13F BOSTON PROPERTIES COM 101121101 3,224,560 -204,185 -5.96 396,685 -12.62 0.1198
2017-05-22 2017-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 3,428,745 -9,578 -0.28 453,999 4.98 0.1395
2017-05-12 2017-03-31 13F BOSTON PROPERTIES COM 101121101 3,428,745 453,999
2017-02-22 2016-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 3,438,323 -46,540 -1.34 432,472 -8.94 0.1415
2017-02-13 2016-12-31 13F BOSTON PROPERTIES COM 101121101 3,438,323 432,472
2016-11-10 2016-09-30 13F BOSTON PROPERTIES COM 101121101 3,484,863 -136,190 -3.76 474,952 -0.56 0.1622
2016-08-12 2016-06-30 13F BOSTON PROPERTIES COM 101121101 3,621,053 -71,542 -1.94 477,616 1.78 0.1725
2016-05-12 2016-03-31 13F BOSTON PROPERTIES COM 101121101 3,692,595 -96,106 -2.54 469,256 -2.89 0.1806
2016-02-09 2015-12-31 13F BOSTON PROPERTIES COM 101121101 3,788,701 -424,275 -10.07 483,211 -3.13 0.1749
2016-02-08 2015-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 4,212,976 -153,730 -3.52 498,819 -5.62 0.1843
2015-11-09 2015-09-30 13F BOSTON PROPERTIES COM 101121101 4,212,976 498,819
2015-08-12 2015-06-30 13F BOSTON PROPERTIES COM 101121101 4,366,706 613,209 16.34 528,547 0.24 0.1832
2015-05-14 2015-03-31 13F BOSTON PROPERTIES COM 101121101 3,753,497 636,031 20.40 527,290 31.43 0.1942
2015-02-13 2014-12-31 13F BOSTON PROPERTIES COM 101121101 3,117,466 353,820 12.80 401,186 25.40 0.1467
2014-12-16 2014-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 2,763,646 32,803 1.20 319,920 -0.87 0.1230
2014-11-14 2014-09-30 13F BOSTON PROPERTIES COM 101121101 2,763,646 319,920
2014-08-12 2014-06-30 13F BOSTON PROPERTIES COM 101121101 2,730,843 21,159 0.78 322,731 3.99 0.5520
2014-05-13 2014-03-31 13F BOSTON PROPERTIES COM 101121101 2,709,684 -528,151 -16.31 310,340 -4.51 0.1300
2014-02-13 2013-12-31 13F BOSTON PROPERTIES COM 101121101 3,237,835 111,296 3.56 324,984 -2.77 0.1382
2013-11-13 2013-09-30 13F BOSTON PROPERTIES INC MASS COM 101121101 3,126,539 -657,140 -17.37 334,228 -16.25 0.1580
2013-08-08 2013-06-30 13F BOSTON PROPERTIES INC MASS COM 101121101 3,783,679 3,783,679 399,064 0.2013
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.