MICHAEL E. LABELLE - 22 Dec 2025 Form 4 Insider Report for BOSTON PROPERTIES LTD PARTNERSHIP

Signature
/s/ Kelli A. DiLuglio, as Attorney-in-Fact
Issuer symbol
N/A
Transactions as of
22 Dec 2025
Net transactions value
+$18,008
Form type
4
Filing time
22 Dec 2025, 17:21:03 UTC
Previous filing
10 Nov 2025
Next filing
27 Jan 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
LABELLE MICHAEL E EVP and CFO of GP C/O BXP, 800 BOYLSTON STREET, BOSTON /s/ Kelli A. DiLuglio, as Attorney-in-Fact 22 Dec 2025 0001419045

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction LTIP Units Award $18,008 +72,034 +31% $0.2500 300,789 22 Dec 2025 Common OP Units 72,034 Direct F1, F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents units of limited partnership interest in the Issuer, granted pursuant to BXP, Inc.'s ("BXP") 2025 Outperformance Plan (the "2025 OPP"). Conditioned on the minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit") only if the performance-based and time-based vesting conditions described below are met. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of common stock of BXP. LTIP Units have no expiration date.
F2 The LTIP Units granted pursuant to the 2025 OPP may be earned based on the appreciation of BXP's common stock price during the four-year performance period ending December 22, 2029. The number of LTIP Units earned, if any, will be determined based on the highest level of achievement of eight performance tiers ranging from $90.00 to $118.00, with 12.5% of the LTIP Units earned at $90.00 and 100% of the LTIP Units earned at $118.00. Linear interpolation does not apply for performance between tiers; however, each $4.00 increase in performance will increase the percentage of the maximum award earned by 12.5%. A performance tier will be achieved if the dividend-adjusted closing price of BXP's common stock equals or exceeds the applicable performance tier over any period of twenty (20) consecutive trading days during the performance period.
F3 The LTIP Units are also subject to time-based vesting conditions, with one-third vesting on the second anniversary of the grant date and the remaining two-thirds vesting ratably over the third and fourth years, subject to continued service and the achievement of the performance-based vesting conditions described above.