Boston Properties, Inc.
DE ˙ DB ˙ US1011211018
52,50 € ↑1,66 (3,27%)
2026-06-02
DELAT PRIS
SecurityDE:BO9 / Boston Properties, Inc.
InstitutionAllstate Corp
Latest Disclosed Ownership33,533 shares
Latest Disclosed Value $ 1,740,363
Allstate Corp reports 5.41% increase in ownership of BO9 / Boston Properties, Inc.

On May 11, 2026 - Allstate Corp filed a 13F-HR form disclosing ownership of 33,533 shares of Boston Properties, Inc. (DE:BO9) valued at $1,506,973 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 31,812 shares of Boston Properties, Inc.. This represents a change in shares of 5.41% during the quarter. The current value of the position is $1,760,482 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)
2026-05-11 2026-03-31 13F BXP ORD Equity 101121101 33,533 1,721 5.41 1,740 -18.92 0.0172
2026-02-09 2025-12-31 13F BXP ORD Equity 101121101 31,812 26,441 492.29 2,147 437.84 0.0293
2025-10-29 2025-09-30 13F BXP ORD Equity 101121101 5,371 5,371 399 0.0091
2025-08-05 2025-06-30 13F BXP ORD Equity 101121101 0 -8,102 -100.00 0 -100.00
2025-05-14 2025-03-31 13F BXP ORD Equity 101121101 8,102 3,734 85.49 544 67.90 0.0160
2025-02-12 2024-12-31 13F BXP ORD Equity 101121101 4,368 4,368 325 0.0096
2024-05-10 2024-03-31 13F BOSTON PPTYS EQU 101121101 0 -14,957 -100.00 0 -100.00
2024-02-09 2023-12-31 13F BOSTON PPTYS EQU 101121101 14,957 -16,408 -52.31 1,050 -43.75 0.0725
2023-11-13 2023-09-30 13F BOSTON PPTYS EQU 101121101 31,365 -18,205 -36.73 1,866 -34.65 0.1090
2023-08-14 2023-06-30 13F BOSTON PPTYS EQU 101121101 49,570 320 0.65 2,855 7.09 0.1818
2023-05-10 2023-03-31 13F BOSTON PROPERTIES REIT EQU 101121101 49,250 -25,489 -34.10 2,665 -47.23 0.1980
2023-02-14 2022-12-31 13F BOSTON PPTYS EQU 101121101 74,739 30,493 68.92 5,051 52.25 0.1536
2022-11-14 2022-09-30 13F BOSTON PPTYS EQU 101121101 44,246 36,045 439.52 3,317 354.38 0.0955
2022-08-15 2022-06-30 13F BOSTON PPTYS EQU 101121101 8,201 8,201 730 0.0225
2021-05-14 2021-03-31 13F BOSTON PROPERTIES EQU 101121101 0 -5,539 -100.00 0 -100.00
2021-02-12 2020-12-31 13F BOSTON PROPERTIES EQU 101121101 5,539 79 1.45 524 19.63 0.0163
2020-11-13 2020-09-30 13F BOSTON PROPERTIES EQU 101121101 5,460 156 2.94 438 -8.56 0.0142
2020-08-13 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP EQU 101121101 5,304 -3,100 -36.89 479 -38.19 0.0165
2020-05-15 2020-03-31 13F BOSTON PROPERTIES COMMON 101121101 8,404 6,099 264.60 775 143.71 0.0304
2020-02-14 2019-12-31 13F BOSTON PROPERTIES COMMON 101121101 2,305 -1,040 -31.09 318 -26.73 0.0058
2019-11-14 2019-09-30 13F BOSTON PROPERTIES COMMON 101121101 3,345 -15,868 -82.59 434 -82.49 0.0075
2019-08-14 2019-06-30 13F BOSTON PROPERTIES COMMON 101121101 19,213 15,868 474.38 2,478 453.13 0.0443
2019-05-20 2019-03-31 13F BOSTON PROPERTIES COMMON 101121101 3,345 0 0.00 448 19.15 0.0121
2019-02-13 2018-12-31 13F BOSTON PROPERTIES COMMON 101121101 3,345 3,345 376 0.0123
2016-11-14 2016-09-30 13F BOSTON PROPERTIES COMMON 101121101 0 -2,700 -100.00 0 -100.00
2016-08-11 2016-06-30 13F BOSTON PROPERTIES COMMON 101121101 2,700 2,700 356 0.0233
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.