보스턴 프로퍼티, Inc.
MX ˙ BMV ˙ US1011211018
SecurityMX:BXP / Boston Properties, Inc.
InstitutionAPG Asset Management US Inc.
Latest Disclosed Ownership7,212,581 shares
Latest Disclosed Value $ 367,985,883
APG Asset Management US Inc. reports 2.55% decrease in ownership of BXP / Boston Properties, Inc.

On May 13, 2026 - APG Asset Management US Inc. filed a 13F-HR form disclosing ownership of 7,212,581 shares of Boston Properties, Inc. (MX:BXP) valued at $367,985,883 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 7,401,513 shares of Boston Properties, Inc.. This represents a change in shares of -2.55% 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)
2026-05-13 2026-03-31 13F BXP COM 101121101 7,212,581 -188,932 -2.55 367,986 -26.32 2.8351
2026-02-12 2025-12-31 13F BXP COM 101121101 7,401,513 0 0.00 499,454 -11.58 3.9117
2025-11-12 2025-09-30 13F BXP COM 101121101 7,401,513 232,591 3.24 564,883 15.67 4.1663
2025-08-12 2025-06-30 13F XP COM 101121101 7,168,922 -47,096 -0.65 488,347 1.07 3.6527
2025-05-14 2025-03-31 13F BXP COM 101121101 7,216,018 -235,814 -3.16 483,185 -12.80 3.7015
2025-02-13 2024-12-31 13F BXP COM 101121101 7,451,832 100,475 1.37 554,118 -5.40 4.2039
2024-11-14 2024-09-30 13F BXP COM 101121101 7,351,357 -17,306 -0.23 585,756 30.98 3.9644
2024-08-14 2024-06-30 13F BOSTON PROPERTIES COM 101121101 7,368,663 -75,000 -1.01 447,204 -5.07 2.5609
2024-05-14 2024-03-31 13F BOSTON PROPERTIES COM 101121101 7,443,663 0 0.00 471,109 -9.80 2.7272
2024-02-14 2023-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 7,443,663 0 0.00 522,322 17.97 3.2018
2024-02-13 2023-12-31 13F BOSTON PROPERTIES COM 101121101 7,443,663 0 522,322 3.0164
2023-11-14 2023-09-30 13F BOSTON PROPERTIES COM 101121101 7,443,663 -82,250 -1.09 442,749 2.15 3.8997
2023-08-14 2023-06-30 13F BOSTON PROPERTIES COM 101121101 7,525,913 164,726 2.24 433,417 8.79 3.4627
2023-05-12 2023-03-31 13F BOSTON PROPERTIES COM 101121101 7,361,187 -89,669 -1.20 398,387 -20.88 3.2532
2023-02-14 2022-12-31 13F BOSTON PROPERTIES COM 101121101 7,450,856 -102,771 -1.36 503,529 -11.08 4.0718
2022-11-14 2022-09-30 13F BOSTON PROPERTIES COM 101121101 7,553,627 65,440 0.87 566,295 -16.53 4.6235
2022-08-12 2022-06-30 13F BOSTON PROPERTIES COM 101121101 7,488,187 -136,223 -1.79 678,430 -30.92 4.6347
2022-05-12 2022-03-31 13F BOSTON PROPERTIES COM 101121101 7,624,410 125,518 1.67 982,024 13.70 5.4659
2022-02-11 2021-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 7,498,892 158,500 2.16 863,722 5.23 4.6165
2022-02-11 2021-12-31 13F BOSTON PROPERTIES COM 101121101 7,498,892 158,500 863,722 4.6539
2021-11-15 2021-09-30 13F BOSTON PROPERTIES COM 101121101 7,340,392 595,000 8.82 820,803 5.87 5.0342
2021-08-13 2021-06-30 13F BOSTON PROPERTIES COM 101121101 6,745,392 452,600 7.19 775,315 21.67 4.7983
2021-05-14 2021-03-31 13F BOSTON PROPERTIES COM 101121101 6,292,792 0 0.00 637,208 7.12 4.3912
2021-02-12 2020-12-31 13F BOSTON PROPERTIES COM 101121101 6,292,792 244,500 4.04 594,858 22.48 4.3802
2020-11-12 2020-09-30 13F BOSTON PROPERTIES COM 101121101 6,048,292 -144,000 -2.33 485,678 -13.22 3.9153
2020-08-14 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP COM 101121101 6,192,292 -120,500 -1.91 559,659 -3.88 4.6636
2020-05-14 2020-03-31 13F BOSTON PROPERTIES COM 101121101 6,312,792 -180,500 -2.78 582,229 -34.96 5.3264
2020-02-13 2019-12-31 13F BOSTON PROPERTIES COM 101121101 6,493,292 0 0.00 895,165 6.32 6.2633
2019-11-08 2019-09-30 13F BOSTON PROPERTIES COM 101121101 6,493,292 -39,000 -0.60 841,920 -0.09 5.8556
2019-08-13 2019-06-30 13F BOSTON PROPERTIES COM 101121101 6,532,292 0 0.00 842,666 -3.64 6.2065
2019-05-14 2019-03-31 13F BOSTON PROPERTIES COM 101121101 6,532,292 -111,000 -1.67 874,543 16.96 6.4046
2019-02-13 2018-12-31 13F BOSTON PROPERTIES COM 101121101 6,643,292 -38,477 -0.58 747,703 -9.09 6.2658
2018-11-09 2018-09-30 13F BOSTON PROPERTIES COM 101121101 6,681,769 12,477 0.19 822,459 -1.67 6.4105
2018-08-13 2018-06-30 13F BOSTON PROPERTIES COM 101121101 6,669,292 112,000 1.71 836,463 3.52 6.5049
2018-05-14 2018-03-31 13F BOSTON PROPERTIES COM 101121101 6,557,292 -18,000 -0.27 807,990 -5.50 6.9214
2018-01-23 2017-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 6,575,292 34,200 0.52 854,985 6.37 7.0118
2018-01-22 2017-12-31 13F BOSTON PROPERTIES COM 101121101 6,575,292 34,200 854,985
2017-10-23 2017-09-30 13F BOSTON PROPERTIES COM 101121101 6,541,092 69,000 1.07 803,769 0.95 6.7208
2017-07-21 2017-06-30 13F BOSTON PROPERTIES COM 101121101 6,472,092 0 0.00 796,197 -7.09 6.7088
2017-05-01 2017-03-31 13F BOSTON PROPERTIES COM 101121101 6,472,092 -15,211 -0.23 856,970 5.02 7.2039
2017-01-30 2016-12-31 13F BOSTON PROPERTIES COM 101121101 6,487,303 194,011 3.08 815,973 -4.87 6.7929
2016-10-31 2016-09-30 13F BOSTON PROPERTIES COM 101121101 6,293,292 -10,800 -0.17 857,713 3.15 6.8346
2016-08-11 2016-06-30 13F BOSTON PROPERTIES COM 101121101 6,304,092 140,847 2.29 831,510 6.16 6.4924
2016-05-16 2016-03-31 13F BOSTON PROPERTIES COM 101121101 6,163,245 60,797 1.00 783,225 0.63 6.3259
2016-02-16 2015-12-31 13F BOSTON PROPERTIES COM 101121101 6,102,448 1,564,606 34.48 778,306 44.86 6.4824
2015-11-12 2015-09-30 13F BOSTON PROPERTIES COM 101121101 4,537,842 34,606 0.77 537,281 -1.43 4.7651
2015-08-12 2015-06-30 13F BOSTON PROPERTIES COM 101121101 4,503,236 0 0.00 545,072 -13.84 5.0314
2015-05-14 2015-03-31 13F BOSTON PROPERTIES COM 101121101 4,503,236 112,344 2.56 632,614 11.95 5.2374
2015-02-10 2014-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 4,390,892 62,861 1.45 565,064 12.78 4.8587
2015-02-09 2014-12-31 13F BOSTON PROPERTIES COM 101121101 4,390,892 565,064
2014-11-12 2014-09-30 13F BOSTON PROPERTIES COM 101121101 4,328,031 0 0.00 501,013 -2.05 4.9113
2014-08-11 2014-06-30 13F BOSTON PROPERTIES COM 101121101 4,328,031 -90,012 -2.04 511,486 1.08 4.8623
2014-04-30 2014-03-31 13F BOSTON PROPERTIES COM 101121101 4,418,043 -90,000 -2.00 505,999 11.83 5.1270
2014-02-20 2013-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 4,508,043 -125,761 -2.71 452,472 -8.66 5.0753
2014-02-12 2013-12-31 13F BOSTON PROPERTIES COM 101121101 4,508,043 452,472
2013-11-13 2013-09-30 13F BOSTON PROPERTIES COM 101121101 4,633,804 -32,262 -0.69 495,354 0.66 5.4839
2013-08-16 2013-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 4,666,066 4,666,066 492,130 5.1320
2013-08-14 2013-06-30 13F BOSTON PROPERTIES COM 101121101 4,784,523 483,524 4.9074
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.