Boston Properties, Inc.
MX ˙ BMV ˙ US1011211018
SecurityMX:BXP / Boston Properties, Inc.
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership343,611 shares
Latest Disclosed Value $ 17,833,411
Bnp Paribas Arbitrage, Sa ownership in BXP / Boston Properties, Inc.

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 343,611 shares of Boston Properties, Inc. (MX:BXP) valued at $17,833,411 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 341,657 shares of Boston Properties, Inc.. This represents a change in shares of 0.57% during the quarter.

Bnp Paribas Arbitrage, Sa 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.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

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.

MX: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)
2026-05-12 2026-03-31 13F BXP Equity 101121101 343,611 1,954 0.57 17,833 -22.65 0.0087
2026-02-10 2025-12-31 13F BXP Equity 101121101 341,657 10,680 3.23 23,055 -6.30 0.0104
2025-11-13 2025-09-30 13F BXP Equity 101121101 330,977 -12,971 -3.77 24,605 6.02 0.0131
2025-08-14 2025-06-30 13F BXP Equity 101121101 343,948 29,284 9.31 23,206 9.76 0.0133
2025-05-14 2025-03-31 13F BXP Equity 101121101 314,664 30,794 10.85 21,142 0.16 0.0124
2025-02-14 2024-12-31 13F BXP Equity 101121101 283,870 98,630 53.24 21,109 41.63 0.0118
2024-11-13 2024-09-30 13F BXP Equity 101121101 185,240 -46,118 -19.93 14,904 4.65 0.0100
2024-08-13 2024-06-30 13F BXP Equity 101121101 231,358 -108,231 -31.87 14,242 -35.78 0.0116
2024-05-01 2024-03-31 13F Boston Properties Equity 101121101 339,589 109,127 47.35 22,179 37.15 0.0195
2024-02-14 2023-12-31 13F/A-2 Boston Properties Equity 101121101 230,462 14,184 6.56 16,172 25.71 0.0184
2024-02-07 2023-12-31 13F/A-1 Boston Properties Equity 101121101 230,462 14,184 16,172 0.0023
2024-02-07 2023-12-31 13F Boston Properties Equity 101121101 230,462 14,184 16,172 0.0187
2023-11-14 2023-09-30 13F Boston Properties Equity 101121101 216,278 92,966 75.39 12,864 81.16 0.0165
2023-08-09 2023-06-30 13F Boston Properties Equity 101121101 123,312 88 0.07 7,102 6.49 0.0089
2023-05-12 2023-03-31 13F BOSTON PROPERTIES EQUITY 101121101 123,224 20,264 19.68 6,669 -4.17 0.0093
2023-02-14 2022-12-31 13F Boston Properties Equity 101121101 102,960 -48,905 -32.20 6,958 -38.88 0.0107
2022-11-16 2022-09-30 13F/A-1 Boston Properties Equity 101121101 151,865 40,389 36.23 11,385 14.78 0.0182
2022-11-15 2022-09-30 13F Boston Properties Equity 101121101 151,865 40,389 11,385 0.0027
2022-08-12 2022-06-30 13F Boston Properties Equity 101121101 111,476 34,249 44.35 9,919 -0.27 0.0155
2022-05-18 2022-03-31 13F/A-1 Boston Properties Equity 101121101 77,227 14,863 23.83 9,947 38.47 0.0134
2022-02-09 2021-12-31 13F BOSTON PROPERTIES EQUITY 101121101 62,364 -58,132 -48.24 7,183 -44.98 0.0102
2021-11-16 2021-09-30 13F/A-1 BOSTON PROPERTIES EQUITY 101121101 120,496 -131,154 -52.12 13,056 -54.73 0.0185
2021-11-12 2021-09-30 13F BOSTON PROPERTIES EQUITY 101121101 195,538 -56,112 15,702 0.0000
2021-08-10 2021-06-30 13F BOSTON PROPERTIES EQUITY 101121101 251,650 54,066 27.36 28,837 44.13 0.0382
2021-05-07 2021-03-31 13F BOSTON PROPERTIES EQUITY 101121101 197,584 -3,429 -1.71 20,007 5.29 0.0293
2021-02-10 2020-12-31 13F BOSTON PROPERTIES EQUITY 101121101 201,013 5,475 2.80 19,002 21.02 0.0353
2020-10-30 2020-09-30 13F BOSTON PROPERTIES EQUITY 101121101 195,538 -282,135 -59.06 15,702 -63.63 0.0225
2020-08-06 2020-06-30 13F BOSTON PROPERTIES EQUITY 101121101 477,673 356,516 294.26 43,172 286.36 0.0762
2020-05-13 2020-03-31 13F BOSTON PROPERTIES EQUITY 101121101 121,157 35,564 41.55 11,174 -5.30 0.0229
2020-02-12 2019-12-31 13F BOSTON PROPERTIES EQUITY 101121101 85,593 -10,019 -10.48 11,800 -4.82 0.0215
2019-11-07 2019-09-30 13F BOSTON PROPERTIES EQUITY 101121101 95,612 48,720 103.90 12,397 104.94 0.0220
2019-07-30 2019-06-30 13F BOSTON PROPERTIES EQUITY 101121101 46,892 -67,628 -59.05 6,049 -60.54 0.0121
2019-04-25 2019-03-31 13F BOSTON PROPERTIES EQUITY 101121101 114,520 73,095 176.45 15,332 228.85 0.0331
2019-02-12 2018-12-31 13F BOSTON PROPERTIES EQUITY 101121101 41,425 -105,923 -71.89 4,662 -74.30 0.0110
2018-11-07 2018-09-30 13F BOSTON PROPERTIES EQUITY 101121101 147,348 21,563 17.14 18,137 14.97 0.0268
2018-07-25 2018-06-30 13F BOSTON PROPERTIES EQUITY 101121101 125,785 58,030 85.65 15,776 88.97 0.0263
2018-05-11 2018-03-31 13F BOSTON PROPERTIES EQUITY 101121101 67,755 25,329 59.70 8,349 51.34 0.0156
2018-03-05 2017-12-31 13F/A-1 BOSTON PROPERTIES EQUITY 101121101 42,426 -101,520 -70.53 5,517 -68.82 0.0098
2018-02-01 2017-12-31 13F BOSTON PROPERTIES EQUITY 101121101 42,426 -101,520 5,517
2017-11-03 2017-09-30 13F BOSTON PROPERTIES STOCK 101121101 143,946 29,167 25.41 17,688 25.27 0.0432
2017-08-03 2017-06-30 13F BOSTON PROPERTIES STOCK 101121101 114,779 -26,819 -18.94 14,120 -24.69 0.0426
2017-05-03 2017-03-31 13F BOSTON PROPERTIES STOCK 101121101 141,598 59,098 71.63 18,749 80.69 0.0495
2017-02-14 2016-12-31 13F BOSTON PROPERTIES STOCK 101121101 82,500 67,825 462.18 10,377 418.80 0.0486
2016-10-05 2016-09-30 13F * BOSTON PROPERTIES INC COM STOCK 101121101 14,675 -18,090 -55.21 2,000 -53.71 0.0082
2016-07-06 2016-06-30 13F * BOSTON PROPERTIES INC COM STOCK 101121101 32,765 -8,864 -21.29 4,322 -18.32 0.0195
2016-04-22 2016-03-31 13F * BOSTON PROPERTIES INC COM STOCK 101121101 41,629 3,616 9.51 5,290 9.12 0.0224
2016-04-19 2015-12-31 13F/A-1 * BOSTON PROPERTIES INC COM STOCK 101121101 38,013 -109,402 -74.21 4,848 -72.22 0.0236
2016-02-10 2015-12-31 13F * BOSTON PROPERTIES INC COM STOCK 101121101 38,013 4,848
2015-11-13 2015-09-30 13F * BOSTON PROPERTIES INC COM STOCK 101121101 147,415 52,624 55.52 17,454 52.12 0.0437
2015-08-14 2015-06-30 13F BOSTON PROPERTIES INC COM STOCK 101121101 94,791 66,486 234.89 11,474 188.56 0.0320
2015-05-15 2015-03-31 13F * BOSTON PROPERTIES INC COM STOCK 101121101 28,305 -61,631 -68.53 3,976 -65.64 0.0110
2015-03-10 2014-12-31 13F/A-1 * BOSTON PROPERTIES INC COM STOCK 101121101 89,936 43,666 94.37 11,574 116.08 0.0410
2015-02-11 2014-12-31 13F * BOSTON PROPERTIES INC COM STOCK 101121101 89,936 11,574
2014-11-12 2014-09-30 13F * BOSTON PROPERTIES INC COM STOCK 101121101 46,270 -11,301 -19.63 5,356 -21.27 0.0047
2014-08-14 2014-06-30 13F/A-1 * BOSTON PROPERTIES INC COM STOCK 101121101 57,571 -21,834 -27.50 6,804 -26.86 0.0064
2014-08-14 2014-06-30 13F BOSTON PROPERTIES INC COM STOCK 101121101 57,571 6,804
2014-05-13 2014-03-31 13F BOSTON PROPERTIES STOCK 101121101 79,405 -41,641 -34.40 9,302 -96.46 0.0072
2014-04-02 2013-12-31 13F/A-1 BOSTON PROPERTIES STOCK 101121101 121,046 -1,570 -1.28 262,924 1,905.98 0.1917
2014-02-12 2013-12-31 13F BOSTON PROPERTIES STOCK 101121101 121,046 262,924
2013-11-13 2013-09-30 13F BOSTON PROPERTIES STOCK 101121101 122,616 62,895 105.31 13,108 108.11 0.0095
2013-08-13 2013-06-30 13F BOSTON PROPERTIES STOCK 101121101 59,721 59,721 6,299 0.0045
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
(%)
2024-08-13 2024-06-30 13F Boston Properties Option Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-01 2024-03-31 13F Boston Properties Option Call 100 653 n/a n/a n/a
2020-10-30 2020-09-30 13F BOSTON PROPERTIES OPTION Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-08-06 2020-06-30 13F BOSTON PROPERTIES OPTION Call 247 0.00 2,232 -2.02 n/a n/a n/a
2020-05-13 2020-03-31 13F BOSTON PROPERTIES OPTION Call 247 0.00 2,278 -33.10 n/a n/a n/a
2020-02-12 2019-12-31 13F BOSTON PROPERTIES OPTION Call 247 -87.17 3,405 22,600.00 n/a n/a n/a
2014-04-02 2013-12-31 13F/A BOSTON PROPERTIES OPTION Call 1,925 0.00 16 -96.41 n/a n/a n/a
2013-11-13 2013-09-30 13F BOSTON PROPERTIES OPTION Call 1,925 -8.55 418 -27.43 n/a n/a n/a
2013-08-13 2013-06-30 13F BOSTON PROPERTIES OPTION Call 2,105 577 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
(%)
2026-02-10 2025-12-31 13F BXP Option Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-13 2025-09-30 13F BXP Option Put 95 -26.92 706 -19.50 n/a n/a n/a
2025-08-14 2025-06-30 13F BXP Option Put 130 877 n/a n/a n/a
2025-05-14 2025-03-31 13F BXP Option Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-02-14 2024-12-31 13F BXP Option Put 20 0.00 149 -7.50 n/a n/a n/a
2024-11-13 2024-09-30 13F BXP Option Put 20 0.00 161 30.08 n/a n/a n/a
2024-08-13 2024-06-30 13F BXP Option Put 20 -87.34 123 -88.07 n/a n/a n/a
2024-05-01 2024-03-31 13F Boston Properties Option Put 158 -25.82 1,032 -30.99 n/a n/a n/a
2024-02-07 2023-12-31 13F/A Boston Properties Option Put 213 1,495 n/a n/a n/a
2024-02-14 2023-12-31 13F/A Boston Properties Option Put 213 1,495 n/a n/a n/a
2024-02-07 2023-12-31 13F Boston Properties Option Put 213 1,495 n/a n/a n/a
2020-10-30 2020-09-30 13F BOSTON PROPERTIES OPTION Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-08-06 2020-06-30 13F BOSTON PROPERTIES OPTION Put 202 -39.34 1,826 -40.57 n/a n/a n/a
2020-05-13 2020-03-31 13F BOSTON PROPERTIES OPTION Put 333 250.53 3,071 134.61 n/a n/a n/a
2020-02-12 2019-12-31 13F BOSTON PROPERTIES OPTION Put 95 5.56 1,310 12.26 n/a n/a n/a
2019-11-07 2019-09-30 13F BOSTON PROPERTIES OPTION Put 90 -81.85 1,167 1,153.76 n/a n/a n/a
2014-04-02 2013-12-31 13F/A BOSTON PROPERTIES OPTION Put 496 93 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.