Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership3,797 shares
Latest Disclosed Value $ 197,168
Advisor Group Holdings, Inc. reports 31.34% decrease in ownership of BXP / Boston Properties, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 3,797 shares of Boston Properties, Inc. (US:BXP) valued at $197,064 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 5,530 shares of Boston Properties, Inc.. This represents a change in shares of -31.34% during the quarter. The current value of the position is $236,667 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 3,797 -1,733 -31.34 197 -47.18 0.0002
2026-02-17 2025-12-31 13F BXP COM 101121101 5,530 -4,100 -42.58 373 -47.32 0.0005
2025-11-14 2025-09-30 13F BXP COM 101121101 9,630 -53,805 -84.82 709 -83.40 0.0010
2025-09-04 2025-06-30 13F/A-1 XP COM 101121101 63,435 52,664 488.94 4,266 488.41 0.0076
2025-08-13 2025-06-30 13F XP COM 101121101 65,541 54,770 4,459 0.0052
2025-05-12 2025-03-31 13F BXP COM 101121101 10,771 -17,328 -61.67 725 -64.65 0.0016
2025-06-06 2024-12-31 13F/A-1 BXP COM 101121101 28,099 20,588 274.10 2,052 239.01 0.0046
2025-02-07 2024-12-31 13F BXP COM 101121101 25,855 18,344 1,916 0.0049
2024-11-13 2024-09-30 13F BXP COM 101121101 7,511 -4,939 -39.67 605 -21.33 0.0014
2024-08-13 2024-06-30 13F BOSTON PROPERTIES COM 101121101 12,450 -2,825 -18.49 769 -23.02 0.0018
2024-05-10 2024-03-31 13F BOSTON PROPERTIES COM 101121101 15,275 -48,183 -75.93 1,000 -77.59 0.0022
2024-02-12 2023-12-31 13F BOSTON PROPERTIES COM 101121101 63,458 -13,728 -17.79 4,457 -3.00 0.0078
2023-11-13 2023-09-30 13F BOSTON PROPERTIES COM 101121101 77,186 23,032 42.53 4,595 47.13 0.0068
2023-08-21 2023-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 54,154 -6,744 -11.07 3,124 -5.28 0.0056
2023-08-10 2023-06-30 13F BOSTON PROPERTIES COM 101121101 54,776 -6,122 3,123 0.0008
2023-05-12 2023-03-31 13F BOSTON PROPERTIES COM 101121101 60,898 15,997 35.63 3,298 8.67 0.0062
2023-02-10 2022-12-31 13F BOSTON PROPERTIES COM 101121101 44,901 26,225 140.42 3,034 116.56 0.0061
2022-11-14 2022-09-30 13F BOSTON PROPERTIES COM 101121101 18,676 4,195 28.97 1,401 8.60 0.0032
2022-08-10 2022-06-30 13F BOSTON PROPERTIES COM 101121101 14,481 1,317 10.00 1,290 -23.21 0.0028
2022-05-04 2022-03-31 13F BOSTON PROPERTIES COM 101121101 13,164 2,514 23.61 1,680 36.36 0.0033
2022-02-03 2021-12-31 13F BOSTON PROPERTIES COM 101121101 10,650 297 2.87 1,232 9.41 0.0023
2021-11-05 2021-09-30 13F BOSTON PROPERTIES COM 101121101 10,353 439 4.43 1,126 -0.97 0.0023
2021-08-02 2021-06-30 13F BOSTON PROPERTIES COM 101121101 9,914 -5,027 -33.65 1,137 -25.00 0.0025
2021-05-13 2021-03-31 13F BOSTON PROPERTIES COM 101121101 14,941 2,901 24.09 1,516 33.69 0.0036
2021-02-10 2020-12-31 13F BOSTON PROPERTIES COM 101121101 12,040 -2,812 -18.93 1,134 -5.18 0.0030
2020-11-12 2020-09-30 13F BOSTON PROPERTIES COM 101121101 14,852 963 6.93 1,196 -4.63 0.0036
2020-08-14 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP COM 101121101 13,889 4,349 45.59 1,254 42.50 0.0042
2020-05-18 2020-03-31 13F BOSTON PROPERTIES COM 101121101 9,540 9,540 880 0.0036
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.