Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionWhittier Trust Co
Latest Disclosed Ownership127,939 shares
Latest Disclosed Value $ 6,640,047
Whittier Trust Co reports 57.62% decrease in ownership of BXP / Boston Properties, Inc.

On April 28, 2026 - Whittier Trust Co filed a 13F-HR form disclosing ownership of 127,939 shares of Boston Properties, Inc. (US:BXP) valued at $6,640,034 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 301,875 shares of Boston Properties, Inc.. This represents a change in shares of -57.62% during the quarter. The current value of the position is $7,938,615 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)
2026-04-28 2026-03-31 13F BOSTON PPTYS common 101121101 127,939 -173,936 -57.62 6,640 -67.70 0.0392
2026-01-26 2025-12-31 13F BOSTON PPTYS common 101121101 301,875 8,561 2.92 20,558 -7.30 0.2226
2025-10-31 2025-09-30 13F BXP common 101121101 293,314 8,745 3.07 22,178 15.51 0.2524
2025-07-30 2025-06-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 284,569 19,722 7.45 19,199 7.90 0.2315
2025-05-02 2025-03-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 264,847 -41,936 -13.67 17,795 -21.99 0.2479
2025-02-11 2024-12-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 306,783 10,429 3.52 22,812 -4.33 0.3005
2024-10-21 2024-09-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 296,354 12,018 4.23 23,844 36.23 0.3191
2024-07-29 2024-06-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 284,336 15,197 5.65 17,503 -0.42 0.2483
2024-05-02 2024-03-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 269,139 92,398 52.28 17,577 41.73 0.2563
2024-01-11 2023-12-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 176,741 137,058 345.38 12,401 425.69 0.2011
2023-10-27 2023-09-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 39,683 1,713 4.51 2,360 7.91 0.0419
2023-07-24 2023-06-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 37,970 23,669 165.51 2,187 182.79 0.0380
2023-04-21 2023-03-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 14,301 13,613 1,978.63 774 1,580.43 0.0141
2023-01-25 2022-12-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 688 0 0.00 46 -11.54 0.0009
2022-10-21 2022-09-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 688 -14 -1.99 52 -16.13 0.0011
2022-07-28 2022-06-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 702 0 0.00 62 -31.11 0.0013
2022-04-29 2022-03-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 702 -110 -13.55 90 -4.26 0.0015
2022-01-19 2021-12-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 812 40 5.18 94 11.90 0.0015
2021-11-01 2021-09-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 772 -400 -34.13 84 -37.31 0.0015
2021-07-29 2021-06-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 1,172 0 0.00 134 12.61 0.0024
2021-04-26 2021-03-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 1,172 -1,500 -56.14 119 -53.15 0.0023
2021-01-29 2020-12-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 2,672 1,492 126.44 254 167.37 0.0054
2020-10-30 2020-09-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 1,180 479 68.33 95 50.79 0.0023
2020-07-10 2020-06-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 701 175 33.27 63 28.57 0.0017
2020-04-27 2020-03-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 526 -1,151 -68.63 49 -78.79 0.0016
2020-01-31 2019-12-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 1,677 1,204 254.55 231 278.69 0.0061
2019-10-18 2019-09-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 473 73 18.25 61 17.31 0.0017
2019-07-23 2019-06-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 0 0.00 52 -3.70 0.0015
2019-04-29 2019-03-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 0 0.00 54 20.00 0.0017
2019-02-07 2018-12-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 0 0.00 45 -8.16 0.0015
2018-10-23 2018-09-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 0 0.00 49 -2.00 0.0015
2018-07-27 2018-06-30 13F/A-1 BOSTON PROPERTIES INC COM REIT'S 101121101 400 -26 -6.10 50 -3.85 0.0017
2018-05-01 2018-03-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 426 26 6.50 52 0.00 0.0017
2018-02-07 2017-12-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 0 0.00 52 6.12 0.0018
2017-10-23 2017-09-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 0 0.00 49 0.00 0.0018
2017-07-20 2017-06-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 -76 -15.97 49 -22.22 0.0019
2017-04-26 2017-03-31 13F BOSTON PROPERTIES REIT'S 101121101 476 61 14.70 63 21.15 0.0025
2017-01-18 2016-12-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 415 15 3.75 52 -5.45 0.0022
2016-11-10 2016-09-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 0 0.00 55 3.77 0.0024
2016-07-28 2016-06-30 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 0 0.00 53 3.92 0.0023
2016-04-28 2016-03-31 13F BOSTON PROPERTIES INC COM REIT'S 101121101 400 0 0.00 51 0.00 0.0023
2016-02-10 2015-12-31 13F BOSTON PROPERTIES INC COM REIT?S 101121101 400 400 51 0.0023
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.