Boston Properties, Inc.
US ˙ NYSE ˙ US1011211018

SecurityBXP / Boston Properties, Inc.
InstitutionAllianz Asset Management GmbH
Latest Disclosed Ownership110,934 shares
Latest Disclosed Value $ 5,757,475
Allianz Asset Management GmbH ownership in BXP / Boston Properties, Inc.

On May 11, 2026 - Allianz Asset Management GmbH filed a 13F-HR form disclosing ownership of 110,934 shares of Boston Properties, Inc. (US:BXP) valued at $5,757,475 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 150,749 shares of Boston Properties, Inc.. This represents a change in shares of -26.41% during the quarter. The current value of the position is $6,914,516 USD.

Allianz Asset Management GmbH has a history of taking positions in derivatives of the underlying security (BXP) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

BXP / Boston Properties, Inc. Historical Put/Call Ratio
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 COM 101121101 110,934 -39,815 -26.41 5,757 -43.40 0.0023
2026-02-11 2025-12-31 13F BXP COM 101121101 150,749 889 0.59 10,173 -8.69 0.0103
2025-11-04 2025-09-30 13F BXP COM 101121101 149,860 54,803 57.65 11,141 73.71 0.0124
2025-07-28 2025-06-30 13F BXP COM 101121101 95,057 -2,350 -2.41 6,413 -2.00 0.0077
2025-05-05 2025-03-31 13F BXP COM 101121101 97,407 -13,574 -12.23 6,545 -20.70 0.0086
2025-02-03 2024-12-31 13F BXP COM 101121101 110,981 -11,942 -9.72 8,253 -16.56 0.0110
2024-11-13 2024-09-30 13F BXP COM 101121101 122,923 -107,670 -46.69 9,890 -30.33 0.0138
2024-08-13 2024-06-30 13F BOSTON PROPERTIES COM 101121101 230,593 4,661 2.06 14,195 -3.80 0.0210
2024-05-14 2024-03-31 13F BOSTON PROPERTIES COM 101121101 225,932 17,016 8.14 14,756 0.65 0.0228
2024-02-12 2023-12-31 13F BOSTON PROPERTIES COM 101121101 208,916 -27,997 -11.82 14,660 4.03 0.0239
2023-11-13 2023-09-30 13F BOSTON PROPERTIES COM 101121101 236,913 -410,794 -63.42 14,092 -62.22 0.0237
2023-08-14 2023-06-30 13F BOSTON PROPERTIES COM 101121101 647,707 -28,455 -4.21 37,301 1.93 0.0668
2023-05-11 2023-03-31 13F BOSTON PROPERTIES COM 101121101 676,162 334,836 98.10 36,594 58.64 0.0649
2023-02-13 2022-12-31 13F BOSTON PROPERTIES COM 101121101 341,326 7,806 2.34 23,067 -7.75 0.0448
2022-11-08 2022-09-30 13F BOSTON PROPERTIES COM 101121101 333,520 161,364 93.73 25,004 63.23 0.0508
2022-08-12 2022-06-30 13F BOSTON PROPERTIES COM 101121101 172,156 172,156 15,318 0.0145
2022-05-13 2022-03-31 13F BOSTON PROPERTIES COM 101121101 0 -207,560 -100.00 0 -100.00
2022-02-11 2021-12-31 13F BOSTON PROPERTIES COM 101121101 207,560 65,589 46.20 23,906 55.42 0.0167
2021-11-10 2021-09-30 13F BOSTON PROPERTIES COM 101121101 141,971 1,753 1.25 15,382 -4.26 0.0120
2021-08-16 2021-06-30 13F BOSTON PROPERTIES COM 101121101 140,218 3,356 2.45 16,067 15.93 0.0137
2021-05-13 2021-03-31 13F BOSTON PROPERTIES COM 101121101 136,862 20,452 17.57 13,859 25.95 0.0134
2021-02-16 2020-12-31 13F BOSTON PROPERTIES COM 101121101 116,410 -54,627 -31.94 11,004 -19.88 0.0109
2020-11-13 2020-09-30 13F BOSTON PROPERTIES COM 101121101 171,037 -21,942 -11.37 13,734 -21.25 0.0160
2020-08-14 2020-06-30 13F BOSTON PPTYS LTD PARTNERSHIP COM 101121101 192,979 50,472 35.42 17,441 32.69 0.0202
2020-05-14 2020-03-31 13F BOSTON PROPERTIES COM 101121101 142,507 -160,568 -52.98 13,144 -68.54 0.0176
2020-02-13 2019-12-31 13F BOSTON PROPERTIES COM 101121101 303,075 -449 -0.15 41,782 6.17 0.0382
2019-11-13 2019-09-30 13F BOSTON PROPERTIES COM 101121101 303,524 32,976 12.19 39,355 12.76 0.0387
2019-08-08 2019-06-30 13F BOSTON PROPERTIES COM 101121101 270,548 -8,163 -2.93 34,901 -6.47 0.0325
2019-05-13 2019-03-31 13F BOSTON PROPERTIES COM 101121101 278,711 36,078 14.87 37,314 36.64 0.0370
2019-04-02 2018-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 242,633 -2,926 -1.19 27,309 -9.65 0.0299
2019-02-13 2018-12-31 13F BOSTON PROPERTIES COM 101121101 242,633 -2,926 27,309
2019-04-09 2018-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 245,559 56,660 29.99 30,226 27.58 0.0274
2018-11-13 2018-09-30 13F BOSTON PROPERTIES COM 101121101 245,559 56,660 30,226
2019-04-09 2018-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 188,899 -658 -0.35 23,692 1.43 0.0231
2018-08-13 2018-06-30 13F BOSTON PROPERTIES COM 101121101 188,899 -658 23,692
2019-04-09 2018-03-31 13F/A-2 BOSTON PROPERTIES COM 101121101 189,557 2,619 1.40 23,357 -3.91 0.0223
2018-05-23 2018-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 189,557 0 23,357 0.0223
2018-05-14 2018-03-31 13F BOSTON PROPERTIES COM 101121101 189,557 2,619 23,357
2019-04-17 2017-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 186,938 -34,565 -15.60 24,308 -10.69 0.0192
2018-02-13 2017-12-31 13F BOSTON PROPERTIES COM 101121101 186,938 -34,565 24,308
2019-04-17 2017-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 221,503 -26,550 -10.70 27,218 -10.80 0.0236
2017-11-13 2017-09-30 13F BOSTON PROPERTIES COM 101121101 221,503 -26,550 27,218
2019-04-17 2017-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 248,053 73,510 42.12 30,515 32.04 0.0295
2017-08-14 2017-06-30 13F BOSTON PROPERTIES COM 101121101 248,053 73,510 30,515
2019-04-17 2017-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 174,543 -2,626 -1.48 23,111 3.72 0.0227
2017-05-15 2017-03-31 13F BOSTON PROPERTIES COM 101121101 174,543 -2,626 23,111
2019-04-17 2016-12-31 13F/A-2 BOSTON PROPERTIES COM 101121101 177,169 25,771 17.02 22,283 7.99 0.0200
2017-03-14 2016-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 177,169 0 22,283 0.0200
2017-02-13 2016-12-31 13F BOSTON PROPERTIES COM 101121101 177,169 22,283
2019-04-17 2016-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 151,398 -36,668 -19.50 20,634 -16.82 0.0202
2016-11-14 2016-09-30 13F BOSTON PROPERTIES COM 101121101 151,398 -36,668 20,634
2017-01-24 2016-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 188,066 13,592 7.79 24,805 11.88 0.0265
2016-08-12 2016-06-30 13F BOSTON PROPERTIES COM 101121101 188,066 24,805
2016-05-13 2016-03-31 13F BOSTON PROPERTIES COM 101121101 174,474 65,171 59.62 22,172 58.60 0.0254
2017-01-24 2015-12-31 13F/A-1 BOSTON PROPERTIES COM 101121101 109,303 43,079 65.05 13,980 78.32 0.0158
2016-02-16 2015-12-31 13F BOSTON PROPERTIES COM 101121101 109,303 13,980
2017-01-24 2015-09-30 13F/A-2 BOSTON PROPERTIES COM 101121101 66,224 -3,574 -5.12 7,840 -7.22 0.0093
2015-11-20 2015-09-30 13F/A-1 BOSTON PROPERTIES COM 101121101 66,224 0 7,419 0.0077
2015-11-13 2015-09-30 13F BOSTON PROPERTIES COM 101121101 66,224 7,419
2015-09-22 2015-06-30 13F/A-1 BOSTON PROPERTIES COM 101121101 69,798 4,457 6.82 8,450 -7.95 0.0090
2015-08-14 2015-06-30 13F BOSTON PROPERTIES COM 101121101 69,998 8,473
2017-01-24 2015-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 65,341 -811 -1.23 9,180 7.84 0.0105
2015-05-15 2015-03-31 13F BOSTON PROPERTIES COM 101121101 65,341 9,179,104
2015-02-17 2014-12-31 13F BOSTON PROPERTIES COM 101121101 66,152 -301 -0.45 8,513 10.67 0.0095
2014-11-14 2014-09-30 13F BOSTON PROPERTIES COM 101121101 66,453 -512 -0.76 7,692 -2.81 0.0093
2014-08-13 2014-06-30 13F BOSTON PROPERTIES COM 101121101 66,965 16,304 32.18 7,914 36.40 0.0099
2014-05-28 2014-03-31 13F/A-1 BOSTON PROPERTIES COM 101121101 50,661 0 0.00 5,802 14.10 0.0070
2014-05-14 2014-03-31 13F BOSTON PROPERTIES COM 101121101 50,661 5,802
2014-02-13 2013-12-31 13F BOSTON PROPERTIES COM 101121101 50,661 -10,019 -16.51 5,085 -21.61 0.0065
2013-11-14 2013-09-30 13F BOSTON PROPERTIES COM 101121101 60,680 -7,044 -10.40 6,487 -9.17 0.0086
2013-08-14 2013-06-30 13F BOSTON PROPERTIES COM 101121101 67,724 67,724 7,142 0.0101
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2019-04-17 2017-12-31 13F/A BOSTON PROPERTIES CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-04-17 2017-09-30 13F/A BOSTON PROPERTIES CALL Call 4,900 -77.42 602 -77.45 n/a n/a n/a
2017-11-13 2017-09-30 13F BOSTON PROPERTIES CALL Call 4,900 602 n/a n/a n/a
2019-04-17 2017-06-30 13F/A BOSTON PROPERTIES CALL Call 21,700 -28.62 2,670 -33.66 n/a n/a n/a
2017-08-14 2017-06-30 13F BOSTON PROPERTIES CALL Call 21,700 2,670 n/a n/a n/a
2019-04-17 2017-03-31 13F/A BOSTON PROPERTIES CALL Call 30,400 63.44 4,025 72.01 n/a n/a n/a
2017-05-15 2017-03-31 13F BOSTON PROPERTIES CALL Call 30,400 4,025 n/a n/a n/a
2017-03-14 2016-12-31 13F/A BOSTON PROPERTIES CALL Call 18,600 2,340 n/a n/a n/a
2019-04-17 2016-12-31 13F/A BOSTON PROPERTIES CALL Call 18,600 129.63 2,340 111.96 n/a n/a n/a
2017-02-13 2016-12-31 13F BOSTON PROPERTIES CALL Call 18,600 2,340 n/a n/a n/a
2019-04-17 2016-09-30 13F/A BOSTON PROPERTIES CALL Call 8,100 -59.90 1,104 -58.56 n/a n/a n/a
2016-11-14 2016-09-30 13F BOSTON PROPERTIES CALL Call 8,100 1,104 n/a n/a n/a
2017-01-24 2016-06-30 13F/A BOSTON PROPERTIES CALL Call 20,200 14.77 2,664 19.09 n/a n/a n/a
2016-08-12 2016-06-30 13F BOSTON PROPERTIES CALL Call 20,200 2,664 n/a n/a n/a
2016-05-13 2016-03-31 13F BOSTON PROPERTIES CALL Call 17,600 198.31 2,237 197.47 n/a n/a n/a
2017-01-24 2015-12-31 13F/A BOSTON PROPERTIES CALL Call 5,900 752 n/a n/a n/a
2016-02-16 2015-12-31 13F BOSTON PROPERTIES CALL Call 5,900 752 n/a n/a n/a
2017-01-24 2015-09-30 13F/A BOSTON PROPERTIES CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2015-09-22 2015-06-30 13F/A BOSTON PROPERTIES CALL Call 3,000 363 n/a n/a n/a
2015-08-14 2015-06-30 13F BOSTON PROPERTIES CALL Call 3,000 363 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2019-04-17 2017-12-31 13F/A BOSTON PROPERTIES PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2019-04-17 2017-09-30 13F/A BOSTON PROPERTIES PUT Put 72,500 -69.75 8,909 -69.79 n/a n/a n/a
2017-11-13 2017-09-30 13F BOSTON PROPERTIES PUT Put 72,500 8,909 n/a n/a n/a
2019-04-17 2017-06-30 13F/A BOSTON PROPERTIES PUT Put 239,700 -6.37 29,488 -13.01 n/a n/a n/a
2017-08-14 2017-06-30 13F BOSTON PROPERTIES PUT Put 239,700 29,488 n/a n/a n/a
2019-04-17 2017-03-31 13F/A BOSTON PROPERTIES PUT Put 256,000 36.68 33,897 43.88 n/a n/a n/a
2017-05-15 2017-03-31 13F BOSTON PROPERTIES PUT Put 256,000 33,897 n/a n/a n/a
2017-03-14 2016-12-31 13F/A BOSTON PROPERTIES PUT Put 187,300 23,559 n/a n/a n/a
2019-04-17 2016-12-31 13F/A BOSTON PROPERTIES PUT Put 187,300 93.09 23,559 78.21 n/a n/a n/a
2017-02-13 2016-12-31 13F BOSTON PROPERTIES PUT Put 187,300 23,559 n/a n/a n/a
2019-04-17 2016-09-30 13F/A BOSTON PROPERTIES PUT Put 97,000 -28.31 13,220 -25.92 n/a n/a n/a
2016-11-14 2016-09-30 13F BOSTON PROPERTIES PUT Put 97,000 13,220 n/a n/a n/a
2017-01-24 2016-06-30 13F/A BOSTON PROPERTIES PUT Put 135,300 97.23 17,846 104.70 n/a n/a n/a
2016-08-12 2016-06-30 13F BOSTON PROPERTIES PUT Put 135,300 17,846 n/a n/a n/a
2016-05-13 2016-03-31 13F BOSTON PROPERTIES PUT Put 68,600 184.65 8,718 183.60 n/a n/a n/a
2017-01-24 2015-12-31 13F/A BOSTON PROPERTIES PUT Put 24,100 703.33 3,074 765.92 n/a n/a n/a
2016-02-16 2015-12-31 13F BOSTON PROPERTIES PUT Put 24,100 3,074 n/a n/a n/a
2015-11-20 2015-09-30 13F/A BOSTON PROPERTIES PUT Put 3,000 355 n/a n/a n/a
2017-01-24 2015-09-30 13F/A BOSTON PROPERTIES PUT Put 3,000 -85.15 355 -85.48 n/a n/a n/a
2015-11-13 2015-09-30 13F BOSTON PROPERTIES PUT Put 3,000 355 n/a n/a n/a
2015-09-22 2015-06-30 13F/A BOSTON PROPERTIES PUT Put 20,200 2,445 n/a n/a n/a
2015-08-14 2015-06-30 13F BOSTON PROPERTIES PUT Put 20,200 2,445 n/a n/a n/a
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.