Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionNorges Bank
Latest Disclosed Ownership10,180,607 shares
Ownership 6.40%
Norges Bank ownership in BXP / Boston Properties, Inc.

2025-04-04 - Norges Bank has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 10,180,607 shares of Boston Properties, Inc. (US:BXP). This represents 6.4 percent ownership of the company. In their previous filing dated 2024-11-12 , Norges Bank had reported owning 12,695,570 shares, indicating a decrease of -19.81 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2025-04-04 2025-04-04 13G/A 12,695,570 10,180,607 -19.81 6.40 -20.40
2024-11-12 2024-11-12 13G/A 12,695,570 12,695,570 0.00 8.04 -0.74
2023-02-14 2023-02-14 13G/A 13,037,554 12,695,570 -2.62 8.10 -3.23
2021-02-01 2021-02-01 13G/A 13,037,554 13,037,554 0.00 8.37 -0.71
2020-02-11 2020-02-11 13G/A 10,634,382 13,037,554 22.60 8.43 22.35
2019-01-24 2019-01-24 13G/A 8,153,590 10,634,382 30.43 6.89 30.49
2018-01-05 2018-01-05 13G 8,153,590 5.28

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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 0 -10,216,641 -100.00 0 -100.00
2026-02-10 2025-12-31 13F BXP COM 101121101 10,216,641 10,216,641 689,419 0.0738
2025-11-13 2025-09-30 13F BXP COM 101121101 0 -10,180,607 -100.00 0 -100.00
2025-08-13 2025-06-30 13F BXP COM 101121101 10,180,607 0 0.00 686,886 0.42 0.0857
2026-05-11 2025-03-31 13F/A-1 BXP COM 101121101 10,180,607 -2,514,963 -19.81 684,035 -27.54 0.0960
2025-02-12 2024-12-31 13F BXP COM 101121101 12,695,570 0 0.00 944,043 -7.58 0.1239
2025-11-12 2024-09-30 13F/A-1 BXP COM 101121101 12,695,570 0 0.00 1,021,486 30.70 0.1427
2024-08-14 2024-06-30 13F BOSTON PROPERTIES COM 101121101 12,695,570 0 0.00 781,539 -5.74 0.1168
2025-05-14 2024-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 12,695,570 0 0.00 829,148 -6.93 0.1309
2024-02-09 2023-12-31 13F BOSTON PROPERTIES COM 101121101 12,695,570 0 0.00 890,848 17.97 0.1557
2024-11-13 2023-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 12,695,570 0 0.00 755,133 3.28 0.1532
2024-08-14 2023-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 12,695,570 0 0.00 731,138 6.41 0.1443
2024-05-15 2023-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 12,695,570 0 0.00 687,084 -19.92 0.1504
2023-02-14 2022-12-31 13F BOSTON PROPERTIES COM 101121101 12,695,570 74,466 0.59 857,967 -9.33 0.2068
2023-11-13 2022-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 12,621,104 570,945 4.74 946,204 -11.75 0.2516
2023-08-14 2022-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 12,050,159 0 0.00 1,072,223 -30.92 0.2772
2023-05-12 2022-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 12,050,159 -987,395 -7.57 1,552,060 3.36 0.3383
2022-03-09 2021-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 13,037,554 0 0.00 1,501,665 6.30 0.3088
2022-11-14 2021-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 13,037,554 0 0.00 1,412,619 -5.45 0.3125
2022-08-15 2021-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 13,037,554 0 0.00 1,493,973 13.16 0.3239
2022-05-09 2021-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 13,037,554 0 0.00 1,320,183 7.12 0.3022
2021-03-02 2020-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 13,037,554 0 0.00 1,232,440 17.72 0.2878
2021-11-12 2020-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 13,037,554 0 0.00 1,046,916 -11.15 0.2781
2021-08-13 2020-06-30 13F/A-1 BOSTON PPTYS LTD PARTNERSHIP COM 101121101 13,037,554 0 0.00 1,178,334 -2.01 0.3392
2021-05-07 2020-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 13,037,554 0 0.00 1,202,454 -33.10 0.4285
2020-03-03 2019-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 13,037,554 1,367,202 11.72 1,797,357 18.78 0.5015
2020-11-13 2019-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 11,670,352 1,035,970 9.74 1,513,178 10.30 0.4634
2020-08-13 2019-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 10,634,382 0 0.00 1,371,835 -3.65 0.4239
2020-05-11 2019-03-31 13F/A-2 BOSTON PROPERTIES COM 101121101 10,634,382 0 0.00 1,423,731 18.95 0.4600
2019-03-04 2018-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 10,634,382 2,000,000 23.16 1,196,899 12.62 0.4452
2019-12-02 2018-09-30 13F/A-3 BOSTON PROPERTIES COM 101121101 8,634,382 94,498 1.11 1,062,807 -0.77 0.3452
2019-12-02 2018-09-30 13F/A-2 BOSTON PROPERTIES COM 101121101 8,634,382 94,498 1,062,807 0.3452
2019-11-12 2018-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 8,634,382 94,498 1,062,807 0.3452
2019-08-12 2018-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 8,539,884 0 0.00 1,071,073 1.79 0.3677
2019-05-15 2018-03-31 13F/A-2 BOSTON PROPERTIES COM 101121101 8,539,884 1,136,294 15.35 1,052,285 9.31 0.3808
2018-03-05 2017-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 7,403,590 2,932,228 65.58 962,689 75.21 0.3450
2018-11-13 2017-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 4,471,362 0 0.00 549,442 -0.11 0.2085
2018-07-24 2017-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 4,471,362 0 0.00 550,067 -7.09 0.2184
2018-05-11 2017-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 4,471,362 0 0.00 592,053 5.27 0.2429
2017-03-02 2016-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 4,471,362 0 0.00 562,408 -3.37 0.2458
2017-11-13 2016-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 4,471,362 0 0.00 582,046 -1.31 0.2751
2017-08-09 2016-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 4,471,362 0 0.00 589,773 3.79 0.2802
2017-05-10 2016-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 4,471,362 1,000,000 28.81 568,221 28.34 0.2795
2016-04-18 2015-12-31 13F/A-2 BOSTON PROPERTIES COM 101121101 3,471,362 0 0.00 442,737 7.72 0.2201
2016-03-16 2015-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 1,271,362 -2,200,000 162,149 0.0813
2016-11-14 2015-09-30 13F/A-2 BOSTON PROPERTIES COM 101121101 3,471,362 0 0.00 411,009 -2.18 0.2154
2016-08-12 2015-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 3,471,362 250,000 7.76 420,174 -7.15 0.2100
2016-05-13 2015-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 3,221,362 0 0.00 452,537 9.16 0.2217
2015-03-19 2014-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 1,021,362 -2,200,000 131,440 0.0670
2016-04-18 2014-12-31 13F/A-2 BOSTON PROPERTIES COM 101121101 3,221,362 0 0.00 414,558 11.17 0.2107
2015-11-12 2014-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 3,221,362 0 0.00 372,904 -2.05 0.2020
2015-08-10 2014-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 3,221,362 0 0.00 380,700 3.19 0.2054
2015-05-12 2014-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 3,221,362 0 0.00 368,943 14.11 0.2082
2014-03-07 2013-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 3,221,362 -129,746 323,329 0.1978
2014-03-20 2013-12-31 13F/A-2 BOSTON PROPERTIES COM 101121101 3,221,362 0 323,329 0.1902
2014-05-12 2013-12-31 13F/A-3 BOSTON PROPERTIES COM 101121101 3,221,362 -129,746 -3.87 323,329 -9.74 0.1862
2014-11-14 2013-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 3,351,108 -39,950 -1.18 358,233 0.16 0.2090
2014-08-14 2013-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 3,391,058 1,000,000 41.82 357,654 48.01 0.2221
2014-04-04 2013-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 2,391,058 1,210,094 241,641 0.1601
2014-05-12 2013-03-31 13F/A-2 BOSTON PROPERTIES COM 101121101 2,391,058 1,210,094 102.47 241,641 84.99 0.1567
2013-11-14 2012-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 1,180,964 12,862 1.10 130,627 0.84 0.0880
2013-08-15 2012-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 1,168,102 1,168,102 129,542 0.1039
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.