BXP

SEC source: 0001246991-24-000121 · wk-form4_1707242199.xml · derivative · entry 1

Kevorkian Eric G · CIK 0001931048 · SVP, CLO and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,050.91

Underlying: Common Stock, par value $.01 · 7,253 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 7,253 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000118 · wk-form4_1707242168.xml · derivative · entry 1

LINDE DOUGLAS T · CIK 0001217102 · Director · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 527,895

Underlying: Common Stock, par value $.01 · 49,458 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 49,458 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000117 · wk-form4_1707242156.xml · derivative · entry 1

KOOP BRYAN J · CIK 0001217098 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 130,056

Underlying: Common Stock, par value $.01 · 12,560 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 12,560 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000115 · wk-form4_1707242134.xml · derivative · entry 1

Stroman John J · CIK 0001862860 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,668

Underlying: Common Stock, par value $.01 · 8,635 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 8,635 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000114 · wk-form4_1707242123.xml · derivative · entry 1

DIEHL RODNEY · CIK 0001255086 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,451

Underlying: Common Stock, par value $.01 · 6,280 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 6,280 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000111 · wk-form4_1707242085.xml · derivative · entry 1

Spann Hilary J. · CIK 0001900835 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,766

Underlying: Common Stock, par value $.01 · 10,990 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 10,990 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000110 · wk-form4_1707242073.xml · derivative · entry 2

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 195,520

Underlying: Common Stock, par value $.01 · 9,813 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 9,813 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000110 · wk-form4_1707242073.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,894

SEC source: 0001246991-24-000108 · wk-form4_1707242049.xml · derivative · entry 1

Walsh Michael R. · CIK 0001637104 · SVP & Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,460

Underlying: Common Stock, par value $.01 · 4,474 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 4,474 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000106 · wk-form4_1707242027.xml · derivative · entry 1

THOMAS OWEN D · CIK 0001339081 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 702,217

Underlying: Common Stock, par value $.01 · 70,654 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 70,654 LTIP Units were fully vested upon issuance as a result of the Reporting Person's attainment of age 62 and the completion of 10 years of service.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000105 · wk-form4_1707242016.xml · derivative · entry 1

Garesche Donna D · CIK 0001965932 · EVP, Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,848

Underlying: Common Stock, par value $.01 · 6,390 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 6,390 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000104 · wk-form4_1707242005.xml · derivative · entry 1

PESTER ROBERT E · CIK 0001217108 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 96,270

Underlying: Common Stock, par value $.01 · 5,495 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 5,495 LTIP Units were fully vested upon issuance as a result of the Reporting Person's attainment of age 65.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000101 · wk-form4_1707241972.xml · derivative · entry 1

Otteni Peter V · CIK 0001862920 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,544

Underlying: Common Stock, par value $.01 · 7,850 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 7,850 LTIP Units vest in four equal annual installments beginning on January 15, 2025.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued pursuant to the Issuer's 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 BPLP or the holder, into a common unit of limited partnership interest in BPLP ("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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000022 · wk-form4_1705517376.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,081

F1 · shares: Shares withheld to satisfy the Reporting Person's tax obligation in connection with the vesting of restricted common stock.

SEC source: 0001246991-24-000021 · wk-form4_1705517364.xml · nonDerivative · entry 1

Kevorkian Eric G · CIK 0001931048 · SVP, CLO and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 906

F1 · shares: Shares withheld to satisfy the Reporting Person's tax obligation in connection with the vesting of restricted common stock.

SEC source: 0001246991-24-000020 · wk-form4_1705517352.xml · nonDerivative · entry 1

Spann Hilary J. · CIK 0001900835 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,717

F1 · shares: Shares withheld to satisfy the Reporting Person's tax obligation in connection with the vesting of restricted common stock.

SEC source: 0001246991-24-000015 · wk-form4_1704225000.xml · derivative · entry 1

WALTON WILLIAM H III · CIK 0001058795 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,634.46

Underlying: Common Stock, par value $0.01 · 338.46 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 95.14 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on October 31, 2023.

SEC source: 0001246991-24-000016 · wk-form4_1704225011.xml · derivative · entry 1

Einiger Carol B. · CIK 0001289668 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,381.63

Underlying: Common Stock, par value $0.01 · 391.91 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 502.84 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on October 31, 2023.

SEC source: 0001246991-24-000014 · wk-form4_1704224987.xml · derivative · entry 1

Ayotte Kelly · CIK 0001702559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,370.08

Underlying: Common Stock, par value $0.01 · 338.46 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 126.32 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on October 31, 2023.

SEC source: 0001246991-24-000013 · wk-form4_1704224974.xml · derivative · entry 1

West Tony · CIK 0001626201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 927.06

Underlying: Common Stock, par value $0.01 · 338.46 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 10.57 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on October 31, 2023.

SEC source: 0001246991-24-000012 · wk-form4_1704224958.xml · derivative · entry 1

DUNCAN BRUCE W · CIK 0001105577 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,432.6

Underlying: Common Stock, par value $0.01 · 480.97 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 124.89 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on October 31, 2023.

SEC source: 0001246991-24-000011 · wk-form4_1704224944.xml · derivative · entry 1

LUSTIG MATTHEW J · CIK 0001203367 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,733.75

Underlying: Common Stock, par value $0.01 · 427.53 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 257.01 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on October 31, 2023.

SEC source: 0001246991-24-000010 · wk-form4_1704224934.xml · derivative · entry 1

KIPP MARY E · CIK 0001478538 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,501.01

Underlying: Common Stock, par value $0.01 · 463.16 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 54.58 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on October 31, 2023.

SEC source: 0001246991-24-000009 · wk-form4_1704224923.xml · derivative · entry 1

KLEIN JOEL · CIK 0001166832 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,318.27

Underlying: Common Stock, par value $0.01 · 480.97 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 284.52 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on October 31, 2023.

SEC source: 0001246991-23-000254 · wf-form4_169627744364310.xml · derivative · entry 1

WALTON WILLIAM H III · CIK 0001058795 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,200.86

Underlying: Common Stock, par value $0.01 · 399.29 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 69.60 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 31, 2023.

SEC source: 0001246991-23-000257 · wf-form4_169627749828273.xml · derivative · entry 1

West Tony · CIK 0001626201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 578.03

Underlying: Common Stock, par value $0.01 · 413.62 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 2.38 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 31, 2023.

SEC source: 0001246991-23-000256 · wf-form4_169627747829820.xml · derivative · entry 1

DUNCAN BRUCE W · CIK 0001105577 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,826.74

Underlying: Common Stock, par value $0.01 · 536.58 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 91.18 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 31, 2023.

SEC source: 0001246991-23-000253 · wf-form4_169627742570143.xml · derivative · entry 1

Ayotte Kelly · CIK 0001702559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,905.3

Underlying: Common Stock, par value $0.01 · 450.92 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 93.56 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 31, 2023.

SEC source: 0001246991-23-000255 · wf-form4_169627745991727.xml · derivative · entry 1

KIPP MARY E · CIK 0001478538 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,983.27

Underlying: Common Stock, par value $0.01 · 546.4 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 35.32 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 31, 2023.

SEC source: 0001246991-23-000252 · wf-form4_169627739831050.xml · derivative · entry 1

Einiger Carol B. · CIK 0001289668 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,486.88

Underlying: Common Stock, par value $0.01 · 462.34 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 391.72 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 31, 2023.

SEC source: 0001246991-23-000251 · wf-form4_169627738003466.xml · derivative · entry 1

LUSTIG MATTHEW J · CIK 0001203367 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,049.21

Underlying: Common Stock, par value $0.01 · 504.37 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 196.33 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 31, 2023.

SEC source: 0001246991-23-000250 · wf-form4_169627735959873.xml · derivative · entry 1

KLEIN JOEL · CIK 0001166832 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,552.78

Underlying: Common Stock, par value $0.01 · 569.7 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 217.18 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 31, 2023.

SEC source: 0001246991-23-000240 · wf-form4_169454787191451.xml · derivative · entry 3

Kevorkian Eric G · CIK 0001931048 · SVP, CLO and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,757.43

Underlying: Common Stock, par value $0.01 · 1,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F3 · derivative.exercise_price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F1 · kind: 1,000 of the reporting person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP") were redeemed by the reporting person for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F1 · price: 1,000 of the reporting person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP") were redeemed by the reporting person for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F3 · price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F3 · derivative.exercise_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F3 · derivative.expiration_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

SEC source: 0001246991-23-000240 · wf-form4_169454787191451.xml · nonDerivative · entry 2

Kevorkian Eric G · CIK 0001931048 · SVP, CLO and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 994

F2 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $66.40 to $66.44, inclusive. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0001246991-23-000240 · wf-form4_169454787191451.xml · nonDerivative · entry 1

Kevorkian Eric G · CIK 0001931048 · SVP, CLO and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,994

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 1,000 of the reporting person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP") were redeemed by the reporting person for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F1 · price: 1,000 of the reporting person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP") were redeemed by the reporting person for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

SEC source: 0001246991-23-000233 · wf-form4_169444326491047.xml · nonDerivative · entry 1

Spann Hilary J. · CIK 0001900835 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,718

F1 · shares: Shares withheld to satisfy the Reporting Person's tax obligation in connection with the vesting of restricted common stock.

SEC source: 0001246991-23-000229 · wf-form4_169401696646629.xml · nonDerivative · entry 2

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F2 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $67.38 to $67.61, inclusive. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0001246991-23-000229 · wf-form4_169401696646629.xml · nonDerivative · entry 1

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,848

F1 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $66.38 to $67.37, inclusive. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0001246991-23-000227 · wf-form4_169394093464379.xml · derivative · entry 4

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,805

Underlying: Common Stock, par value $0.01 · 65,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F1 · kind: 65,000 of the reporting person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the reporting person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F1 · price: 65,000 of the reporting person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the reporting person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F3 · price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F3 · derivative.exercise_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F3 · derivative.expiration_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

SEC source: 0001246991-23-000227 · wf-form4_169394093464379.xml · derivative · entry 3

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 153,805

Underlying: Common Stock, par value $0.01 · 65,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F1 · kind: 65,000 of the reporting person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the reporting person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F1 · price: 65,000 of the reporting person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the reporting person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F3 · price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F3 · derivative.exercise_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

F3 · derivative.expiration_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for redemption for one share of the Issuer's Common Stock. Common OP Units have no expiration date.

SEC source: 0001246991-23-000227 · wf-form4_169394093464379.xml · derivative · entry 2

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 167,175

Underlying: Common Stock, par value $0.01 · 65,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · security: Represents LTIP Units in BPLP issued as long term incentive compensation pursuant to the Issuer's equity based incentive programs. 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 BPLP or the holder, into a 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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of the Issuer's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_price: Represents LTIP Units in BPLP issued as long term incentive compensation pursuant to the Issuer's equity based incentive programs. 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 BPLP or the holder, into a 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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of the Issuer's common stock. LTIP Units have no expiration date.

F1 · kind: 65,000 of the reporting person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the reporting person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F2 · derivative.exercise_date: Represents LTIP Units in BPLP issued as long term incentive compensation pursuant to the Issuer's equity based incentive programs. 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 BPLP or the holder, into a 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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of the Issuer's common stock. LTIP Units have no expiration date.

F2 · derivative.expiration_date: Represents LTIP Units in BPLP issued as long term incentive compensation pursuant to the Issuer's equity based incentive programs. 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 BPLP or the holder, into a 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 the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of the Issuer's common stock. LTIP Units have no expiration date.

SEC source: 0001246991-23-000227 · wf-form4_169394093464379.xml · nonDerivative · entry 1

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: 65,000 of the reporting person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the reporting person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F1 · price: 65,000 of the reporting person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the reporting person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

SEC source: 0001246991-23-000216 · wf-form4_168856876008769.xml · derivative · entry 1

WALTON WILLIAM H III · CIK 0001058795 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,731.97

Underlying: Common Stock, par value $0.01 · 397.68 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 78.17 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on April 28, 2023.

SEC source: 0001246991-23-000223 · wf-form4_168856886823121.xml · derivative · entry 1

Einiger Carol B. · CIK 0001289668 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,632.82

Underlying: Common Stock, par value $0.01 · 450.87 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 472.18 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on April 28, 2023.

SEC source: 0001246991-23-000222 · wf-form4_168856885398516.xml · derivative · entry 1

West Tony · CIK 0001626201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 162.03

Underlying: Common Stock, par value $0.01 · 162.03 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

SEC source: 0001246991-23-000221 · wf-form4_168856883814582.xml · derivative · entry 1

KIPP MARY E · CIK 0001478538 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,401.55

Underlying: Common Stock, par value $0.01 · 500.01 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 34.29 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on April 28, 2023.

SEC source: 0001246991-23-000220 · wf-form4_168856882440547.xml · derivative · entry 1

DUNCAN BRUCE W · CIK 0001105577 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,198.98

Underlying: Common Stock, par value $0.01 · 462.8 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 103.45 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on April 28, 2023.

SEC source: 0001246991-23-000219 · wf-form4_168856880862198.xml · derivative · entry 1

Ayotte Kelly · CIK 0001702559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,360.82

Underlying: Common Stock, par value $0.01 · 571.32 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 104.41 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on April 28, 2023.

SEC source: 0001246991-23-000218 · wf-form4_168856879370771.xml · derivative · entry 1

KLEIN JOEL · CIK 0001166832 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,765.9

Underlying: Common Stock, par value $0.01 · 534.11 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 256.66 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on April 28, 2023.

SEC source: 0001246991-23-000217 · wf-form4_168856877579957.xml · derivative · entry 1

LUSTIG MATTHEW J · CIK 0001203367 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,348.51

Underlying: Common Stock, par value $0.01 · 506.21 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Boston Properties, Inc. common stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. ("BXP") 2021 Stock Incentive Plan to non-employee directors who elected to receive Phantom Stock Units in lieu of director cash compensation fees. The Phantom Stock Units are to be settled in shares of BXP common stock (except that fractional units, if any, will be settled in cash) in a lump sum or in ten annual installments, at the reporting person's election, following the reporting person's retirement from the BXP Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may make one or more elections to convert a portion (but only in 25% increments) of their notional investment from BXP common stock to a deemed investment in one or more measurement funds. These elections may only be made after the director's service on the BXP Board of Directors ends. Amounts notionally invested in measurement funds will be settled in cash instead of BXP common stock.

F3 · balance_after: Includes 231.61 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the reporting person on April 28, 2023.