BRYAN J. KOOP - 30 Jan 2026 Form 4 Insider Report for BOSTON PROPERTIES LTD PARTNERSHIP

Role: Executive Vice President of GP
Signature: /s/ Kelli A. DiLuglio, as Attorney-in-Fact
Issuer symbol: N/A
Transactions as of: 30 Jan 2026
Net transactions value: +$3,286
Form type: 4
Filing time: 02 Feb 2026, 15:56:15 UTC
Previous filing: 22 Dec 2025
Next filing: 17 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
KOOP BRYAN J	Executive Vice President of GP	C/O BXP, 800 BOYLSTON STREET, BOSTON	/s/ Kelli A. DiLuglio, as Attorney-in-Fact	02 Feb 2026	0001217098

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	$3,286	+13,143	+6.3%	$0.2500	221,791	30 Jan 2026	Common OP Units	13,143		Direct	F1, F2

* 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 in the Issuer issued pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon 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"). 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 BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.
F2	The 13,143 LTIP Units vest in four equal annual installments beginning on January 15, 2027.

Content

Represents units of limited partnership in the Issuer issued pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon 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"). 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 BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

The 13,143 LTIP Units vest in four equal annual installments beginning on January 15, 2027.