보스턴 프로퍼티, Inc.
MX ˙ BMV ˙ US1011211018
SecurityMX:BXP / Boston Properties, Inc.
InstitutionWorldquant Millennium Advisors Llc
Latest Disclosed Ownership109,397 shares
Latest Disclosed Value $ 5,677,704
Worldquant Millennium Advisors Llc reports 18.27% decrease in ownership of BXP / Boston Properties, Inc.

On May 15, 2026 - Worldquant Millennium Advisors Llc filed a 13F-HR form disclosing ownership of 109,397 shares of Boston Properties, Inc. (MX:BXP) valued at $5,677,704 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 133,859 shares of Boston Properties, Inc.. This represents a change in shares of -18.27% during the quarter.

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 109,397 -24,462 -18.27 5,678 -37.15 0.0219
2026-02-17 2025-12-31 13F BXP COM 101121101 133,859 -91,630 -40.64 9,033 -46.12 0.0350
2025-11-14 2025-09-30 13F BXP COM 101121101 225,489 86,106 61.78 16,763 78.24 0.0724
2025-08-14 2025-06-30 13F BXP COM 101121101 139,383 68,364 96.26 9,404 97.11 0.0467
2025-05-15 2025-03-31 13F BXP COM 101121101 71,019 -14,080 -16.55 4,772 -24.59 0.0301
2025-02-14 2024-12-31 13F BXP COM 101121101 85,099 10,587 14.21 6,328 5.54 0.0410
2024-11-14 2024-09-30 13F BXP COM 101121101 74,512 -129,133 -63.41 5,995 -52.18 0.0439
2024-08-14 2024-06-30 13F BOSTON PROPERTIES COM 101121101 203,645 134,826 195.91 12,536 178.95 0.1143
2024-05-15 2024-03-31 13F BOSTON PROPERTIES COM 101121101 68,819 -301,536 -81.42 4,495 -82.71 0.0555
2024-02-14 2023-12-31 13F BOSTON PROPERTIES COM 101121101 370,355 256,689 225.83 25,988 284.42 0.3637
2023-11-14 2023-09-30 13F BOSTON PROPERTIES COM 101121101 113,666 113,666 6,761 0.1044
2023-05-15 2023-03-31 13F BOSTON PROPERTIES COM 101121101 0 -26,095 -100.00 0 -100.00
2023-02-14 2022-12-31 13F BOSTON PROPERTIES COM 101121101 26,095 13,254 103.22 2 -99.90 0.0402
2022-11-14 2022-09-30 13F BOSTON PROPERTIES COM 101121101 12,841 12,841 963 0.0234
2021-08-16 2021-06-30 13F BOSTON PROPERTIES COM 101121101 0 -13,394 -100.00 0 -100.00
2021-05-17 2021-03-31 13F BOSTON PROPERTIES COM 101121101 13,394 0 0.00 1,356 7.11 0.0288
2021-02-16 2020-12-31 13F BOSTON PROPERTIES COM 101121101 13,394 -1,244 -8.50 1,266 7.74 0.0277
2020-11-16 2020-09-30 13F BOSTON PROPERTIES COM 101121101 14,638 225 1.56 1,175 -9.82 0.0278
2020-08-14 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP COM 101121101 14,413 10,650 283.02 1,303 275.50 0.0300
2020-05-14 2020-03-31 13F BOSTON PROPERTIES COM 101121101 3,763 -699 -15.67 347 -43.58 0.0084
2020-02-14 2019-12-31 13F BOSTON PROPERTIES COM 101121101 4,462 -159 -3.44 615 2.67 0.0118
2019-11-14 2019-09-30 13F BOSTON PROPERTIES COM 101121101 4,621 -7,207 -60.93 599 -60.75 0.0116
2019-08-14 2019-06-30 13F BOSTON PROPERTIES COM 101121101 11,828 1,969 19.97 1,526 15.61 0.0291
2019-05-14 2019-03-31 13F BOSTON PROPERTIES COM 101121101 9,859 2,234 29.30 1,320 53.85 0.0313
2019-02-14 2018-12-31 13F BOSTON PROPERTIES COM 101121101 7,625 2,629 52.62 858 39.51 0.0254
2018-11-14 2018-09-30 13F BOSTON PROPERTIES COM 101121101 4,996 167 3.46 615 1.49 0.0206
2018-08-14 2018-06-30 13F BOSTON PROPERTIES COM 101121101 4,829 4,829 606 0.0232
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.