Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionAmundi
Latest Disclosed Ownership341,138 shares
Latest Disclosed Value $ 17,705,062
Amundi reports 44.10% decrease in ownership of BXP / Boston Properties, Inc.

On May 15, 2026 - Amundi filed a 13F-HR form disclosing ownership of 341,138 shares of Boston Properties, Inc. (US:BXP) valued at $17,705,062 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 610,251 shares of Boston Properties, Inc.. This represents a change in shares of -44.10% during the quarter. The current value of the position is $20,775,304 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 341,138 -269,113 -44.10 17,705 -57.00 0.0020
2026-02-17 2025-12-31 13F BXP COM 101121101 610,251 21,541 3.66 41,180 -6.25 0.0112
2025-11-14 2025-09-30 13F BXP COM 101121101 588,710 -117,873 -16.68 43,924 -8.95 0.0141
2025-08-13 2025-06-30 13F BXP COM 101121101 706,583 7,034 1.01 48,238 10.16 0.0167
2025-05-15 2025-03-31 13F BXP COM 101121101 699,549 115,519 19.78 43,792 7.22 0.0159
2025-02-07 2024-12-31 13F BXP COM 101121101 584,030 114,033 24.26 40,841 7.39 0.0142
2024-11-13 2024-09-30 13F BXP COM 101121101 469,997 63,271 15.56 38,032 52.10 0.0140
2024-08-14 2024-06-30 13F BOSTON PROPERTIES COM 101121101 406,726 -15,753 -3.73 25,006 0.85 0.0096
2024-05-15 2024-03-31 13F BOSTON PROPERTIES COM 101121101 422,479 -20,227 -4.57 24,795 -21.47 0.0107
2024-02-14 2023-12-31 13F BOSTON PROPERTIES COM 101121101 442,706 54,017 13.90 31,574 46.52 0.0142
2023-11-14 2023-09-30 13F BOSTON PROPERTIES COM 101121101 388,689 1,903 0.49 21,549 -4.67 0.0106
2023-08-14 2023-06-30 13F BOSTON PROPERTIES COM 101121101 386,786 20,108 5.48 22,604 17.35 0.0114
2023-05-15 2023-03-31 13F BOSTON PROPERTIES COM 101121101 366,678 -13,197 -3.47 19,262 -27.32 0.0104
2023-02-14 2022-12-31 13F BOSTON PROPERTIES COM 101121101 379,875 32,930 9.49 26,500 2.53 0.0145
2022-11-14 2022-09-30 13F BOSTON PROPERTIES COM 101121101 346,945 65,460 23.26 25,847 7.31 0.0153
2022-09-02 2022-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 281,485 -51,445 -15.45 24,087 -40.88 0.0193
2022-08-15 2022-06-30 13F BOSTON PROPERTIES COM 101121101 281,485 -51,445 24,087 0.0013
2022-05-16 2022-03-31 13F BOSTON PROPERTIES COM 101121101 332,930 21,280 6.83 40,741 3.99 0.0276
2022-02-14 2021-12-31 13F BOSTON PROPERTIES COM 101121101 311,650 -26,729 -7.90 39,178 6.86 0.0248
2021-11-15 2021-09-30 13F BOSTON PROPERTIES COM 101121101 338,379 32,069 10.47 36,663 104,651.43 0.0257
2021-08-16 2021-06-30 13F BOSTON PROPERTIES COM 101121101 306,310 306,310 35 0.0244
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.