LABELLE MICHAEL E

SEC source: 0001419045-26-000018 · wk-form4_1781101544.xml · nonDerivative · entry 2

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,839

F2 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $66.815 to $67.11, 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: 0001419045-26-000018 · wk-form4_1781101544.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,872

F1 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $65.81 to $66.79, 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: 0001419045-26-000015 · wk-form4_1780586661.xml · derivative · entry 3

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,395

Underlying: Common OP Units · 23,981 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 LTIP Units in the Issuer issued pursuant to BXP'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 the Issuer 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 BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F3 · derivative.exercise_price: Represents LTIP Units in the Issuer issued pursuant to BXP'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 the Issuer 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 BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F2 · kind: 23,981 of the reporting person's units of limited partnership interest ("LTIP Units") in the Issuer were converted into Common OP Units in the Issuer by the reporting person and the Common OP Units were redeemed for an equal number of shares of BXP's common stock, in accordance with the terms of the Issuer's Partnership Agreement.

F3 · derivative.exercise_date: Represents LTIP Units in the Issuer issued pursuant to BXP'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 the Issuer 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 BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F3 · derivative.expiration_date: Represents LTIP Units in the Issuer issued pursuant to BXP'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 the Issuer 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 BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

SEC source: 0001419045-26-000015 · wk-form4_1780586661.xml · nonDerivative · entry 2

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

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 · security: Represents common units of limited partnership interest ("Common OP Units") in the Issuer. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP, Inc. ("BXP"), the Issuer's sole general partner, except that BXP may at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock.

F2 · kind: 23,981 of the reporting person's units of limited partnership interest ("LTIP Units") in the Issuer were converted into Common OP Units in the Issuer by the reporting person and the Common OP Units were redeemed for an equal number of shares of BXP's common stock, in accordance with the terms of the Issuer's Partnership Agreement.

F1 · price: Represents common units of limited partnership interest ("Common OP Units") in the Issuer. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP, Inc. ("BXP"), the Issuer's sole general partner, except that BXP may at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock.

F2 · price: 23,981 of the reporting person's units of limited partnership interest ("LTIP Units") in the Issuer were converted into Common OP Units in the Issuer by the reporting person and the Common OP Units were redeemed for an equal number of shares of BXP's common stock, in accordance with the terms of the Issuer's Partnership Agreement.

SEC source: 0001419045-26-000015 · wk-form4_1780586661.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,981

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 · security: Represents common units of limited partnership interest ("Common OP Units") in the Issuer. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP, Inc. ("BXP"), the Issuer's sole general partner, except that BXP may at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock.

F2 · kind: 23,981 of the reporting person's units of limited partnership interest ("LTIP Units") in the Issuer were converted into Common OP Units in the Issuer by the reporting person and the Common OP Units were redeemed for an equal number of shares of BXP's common stock, in accordance with the terms of the Issuer's Partnership Agreement.

F1 · price: Represents common units of limited partnership interest ("Common OP Units") in the Issuer. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP, Inc. ("BXP"), the Issuer's sole general partner, except that BXP may at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock.

F2 · price: 23,981 of the reporting person's units of limited partnership interest ("LTIP Units") in the Issuer were converted into Common OP Units in the Issuer by the reporting person and the Common OP Units were redeemed for an equal number of shares of BXP's common stock, in accordance with the terms of the Issuer's Partnership Agreement.

SEC source: 0001419045-26-000016 · wk-form4_1780586666.xml · derivative · entry 4

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $0.01 · 23,981 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 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 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 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 redemption for one share of the Issuer's common stock. Common OP Units have no expiration date.

F1 · price: 23,981 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 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 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 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 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 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 redemption for one share of the Issuer's common stock. Common OP Units have no expiration date.

SEC source: 0001419045-26-000016 · wk-form4_1780586666.xml · derivative · entry 3

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,981

Underlying: Common Stock, par value $0.01 · 23,981 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 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 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 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 redemption for one share of the Issuer's common stock. Common OP Units have no expiration date.

F1 · kind: 23,981 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: 23,981 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 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 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 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 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 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 redemption for one share of the Issuer's common stock. Common OP Units have no expiration date.

SEC source: 0001419045-26-000016 · wk-form4_1780586666.xml · derivative · entry 2

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,395

Underlying: Common Stock, par value $.01 · 23,981 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 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 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: 23,981 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 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 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: 0001419045-26-000016 · wk-form4_1780586666.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,952

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 · price: 23,981 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: 0001419045-26-000011 · wk-form4_1771360391.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 324,376

Underlying: Common OP Units · 7,736 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in the Issuer earned (i.e., for which the performance-based hurdles have been met) pursuant to BXP, Inc.'s ("BXP's"), the Issuer's sole general partner's, 2023 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The LTIP Units earned pursuant to the Program vested in full upon being earned. Each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit is subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F2 · derivative.expiration_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F4 · balance_after: Reflects the forfeiture of 7,343 LTIP Units originally issued on February 7, 2023 pursuant to the Program that were previously reported as beneficially owned by the Reporting Person, but remained subject to certain performance-based vesting hurdles based on the Issuer's total shareholder return for the period from February 7, 2023 to February 6, 2026.

SEC source: 0001419045-26-000012 · wk-form4_1771360405.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 324,376

Underlying: Common Stock, par value $.01 · 7,736 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, earned (i.e., for which the performance-based hurdles have been met) pursuant to the Issuer's 2023 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: 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 the Issuer's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: 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 the Issuer's common stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The LTIP Units earned pursuant to the Program vested in full upon being earned. Each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit is subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F2 · derivative.expiration_date: 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 the Issuer's common stock. LTIP Units have no expiration date.

F4 · balance_after: Reflects the forfeiture of 7,343 LTIP Units originally issued on February 7, 2023 pursuant to the Program that were previously reported as beneficially owned by the Reporting Person, but remained subject to certain performance-based vesting hurdles based on the Issuer's total shareholder return for the period from February 7, 2023 to February 6, 2026.

SEC source: 0001419045-26-000007 · wk-form4_1770065719.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 323,983

Underlying: Common OP Units · 23,194 shares

Expires not disclosed

F1 · security: Represents units of limited partnership in the Issuer issued pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership in the Issuer issued pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership in the Issuer issued pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 23,194 LTIP Units vest in four equal annual installments beginning on January 15, 2027.

F1 · derivative.expiration_date: Represents units of limited partnership in the Issuer issued pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

SEC source: 0001419045-26-000008 · wk-form4_1770065767.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 323,983

Underlying: Common Stock, par value $0.01 · 23,194 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 23,194 LTIP Units vest in four equal annual installments beginning on January 15, 2027.

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: 0001419045-26-000002 · wk-form4_1768940527.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,565

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

SEC source: 0001419045-26-000004 · wk-form4a_1769542015.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,971

F1 · shares: This amendment is being filed to correct the number of shares withheld to satisfy the Reporting Person's tax obligation in connection with the vesting of restricted common stock reported on the Form 4 filed on January 20, 2026. Due to an administrative error, the original filing incorrectly reported that 1,658 shares were withheld. The correct number of shares withheld, as reported in this amendment, was 1,252 shares. This amendment also corrects the number of shares beneficially owned by the Reporting Person following the withholding transaction.

F1 · balance_after: This amendment is being filed to correct the number of shares withheld to satisfy the Reporting Person's tax obligation in connection with the vesting of restricted common stock reported on the Form 4 filed on January 20, 2026. Due to an administrative error, the original filing incorrectly reported that 1,658 shares were withheld. The correct number of shares withheld, as reported in this amendment, was 1,252 shares. This amendment also corrects the number of shares beneficially owned by the Reporting Person following the withholding transaction.

SEC source: 0001419045-25-000006 · wk-form4_1766442059.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,789

Underlying: Common OP Units · 72,034 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in the Issuer, granted pursuant to BXP, Inc.'s ("BXP") 2025 Outperformance Plan (the "2025 OPP"). Conditioned on the minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit") only if the performance-based and time-based vesting conditions described below are met. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of common stock of BXP. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in the Issuer, granted pursuant to BXP, Inc.'s ("BXP") 2025 Outperformance Plan (the "2025 OPP"). Conditioned on the minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit") only if the performance-based and time-based vesting conditions described below are met. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of common stock of BXP. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in the Issuer, granted pursuant to BXP, Inc.'s ("BXP") 2025 Outperformance Plan (the "2025 OPP"). Conditioned on the minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit") only if the performance-based and time-based vesting conditions described below are met. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of common stock of BXP. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The LTIP Units granted pursuant to the 2025 OPP may be earned based on the appreciation of BXP's common stock price during the four-year performance period ending December 22, 2029. The number of LTIP Units earned, if any, will be determined based on the highest level of achievement of eight performance tiers ranging from $90.00 to $118.00, with 12.5% of the LTIP Units earned at $90.00 and 100% of the LTIP Units earned at $118.00. Linear interpolation does not apply for performance between tiers; however, each $4.00 increase in performance will increase the percentage of the maximum award earned by 12.5%. A performance tier will be achieved if the dividend-adjusted closing price of BXP's common stock equals or exceeds the applicable performance tier over any period of twenty (20) consecutive trading days during the performance period.

F3 · derivative.exercise_date: The LTIP Units are also subject to time-based vesting conditions, with one-third vesting on the second anniversary of the grant date and the remaining two-thirds vesting ratably over the third and fourth years, subject to continued service and the achievement of the performance-based vesting conditions described above.

F1 · derivative.expiration_date: Represents units of limited partnership interest in the Issuer, granted pursuant to BXP, Inc.'s ("BXP") 2025 Outperformance Plan (the "2025 OPP"). Conditioned on the minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit") only if the performance-based and time-based vesting conditions described below are met. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of common stock of BXP. LTIP Units have no expiration date.

SEC source: 0001419045-25-000007 · wk-form4_1766442077.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,789

Underlying: Common Stock, par value $0.01 · 72,034 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, granted pursuant to the Issuer's 2025 Outperformance Plan (the "2025 OPP"). Conditioned on the minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted at the election of BPLP or the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit") only if the performance-based and time-based vesting conditions described below are met. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of its 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, granted pursuant to the Issuer's 2025 Outperformance Plan (the "2025 OPP"). Conditioned on the minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted at the election of BPLP or the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit") only if the performance-based and time-based vesting conditions described below are met. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of its 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, granted pursuant to the Issuer's 2025 Outperformance Plan (the "2025 OPP"). Conditioned on the minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted at the election of BPLP or the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit") only if the performance-based and time-based vesting conditions described below are met. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of its common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The LTIP Units granted pursuant to the 2025 OPP may be earned based on the appreciation of the Issuer's common stock price during the four-year performance period ending December 22, 2029. The number of LTIP Units earned, if any, will be determined based on the highest level of achievement of eight performance tiers ranging from $90.00 to $118.00, with 12.5% of the LTIP Units earned at $90.00 and 100% of the LTIP Units earned at $118.00. Linear interpolation does not apply for performance between tiers; however, each $4.00 increase in performance will increase the percentage of the maximum award earned by 12.5%. A performance tier will be achieved if the dividend-adjusted closing price of the Issuer's common stock equals or exceeds the applicable performance tier over any period of twenty (20) consecutive trading days during the performance period.

F3 · derivative.exercise_date: The LTIP Units are also subject to time-based vesting conditions, with one-third vesting on the second anniversary of the grant date and the remaining two-thirds vesting ratably over the third and fourth years, subject to continued service and the achievement of the performance-based vesting conditions described above.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, granted pursuant to the Issuer's 2025 Outperformance Plan (the "2025 OPP"). Conditioned on the minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted at the election of BPLP or the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit") only if the performance-based and time-based vesting conditions described below are met. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of its common stock. LTIP Units have no expiration date.

SEC source: 0001419045-25-000003 · wk-form4_1762806601.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,223

SEC source: 0001246991-25-000097 · wk-form4_1739218463.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 228,755

Underlying: Common OP Units · 3,843 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in the Issuer earned (i.e., for which the performance-based hurdles have been met) pursuant to BXP, Inc.'s ("BXP's"), the Issuer's sole general partner's, 2022 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The 3,843 LTIP Units earned pursuant to the Program vested in full upon being earned. Each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit is subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F2 · derivative.expiration_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F4 · balance_after: Reflects the forfeiture of 6,646 LTIP Units originally issued on February 1, 2022 pursuant to the Program that were previously reported as beneficially owned by the Reporting Person, but remained subject to certain performance-based vesting hurdles based on the Issuer's total shareholder return for the period from February 1, 2022 to January 31, 2025.

SEC source: 0001246991-25-000108 · wk-form4_1739218575.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 228,755

Underlying: Common Stock, par value $.01 · 3,843 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, earned (i.e., for which the performance-based hurdles have been met) pursuant to the Issuer's 2022 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: 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 the Issuer's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: 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 the Issuer's common stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The 3,843 LTIP Units earned pursuant to the Program vested in full upon being earned. Each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit is subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F2 · derivative.expiration_date: 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 the Issuer's common stock. LTIP Units have no expiration date.

F4 · balance_after: Reflects the forfeiture of 6,646 LTIP Units originally issued on February 1, 2022 pursuant to the Program that were previously reported as beneficially owned by the Reporting Person, but remained subject to certain performance-based vesting hurdles based on the Issuer's total shareholder return for the period from February 1, 2022 to January 31, 2025.

SEC source: 0001246991-25-000048 · wk-form4_1738616937.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 231,558

Underlying: Common OP Units · 20,508 shares

Expires not disclosed

F1 · security: Represents units of limited partnership in the Issuer issued as long term incentive compensation pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership in the Issuer issued as long term incentive compensation pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership in the Issuer issued as long term incentive compensation pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 20,508 LTIP Units vest in four equal annual installments beginning on January 15, 2026.

F1 · derivative.expiration_date: Represents units of limited partnership in the Issuer issued as long term incentive compensation pursuant to BXP, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

SEC source: 0001246991-25-000049 · wk-form4_1738616948.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 231,558

Underlying: Common Stock, par value $0.01 · 20,508 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 20,508 LTIP Units vest in four equal annual installments beginning on January 15, 2026.

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: 0001246991-25-000019 · wk-form4_1737146937.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,645

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

SEC source: 0001246991-24-000193 · wk-form4_1707924681.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 211,050

Underlying: Common OP Units · 10,390 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in the Issuer earned (i.e., for which the performance-based hurdles have been met) pursuant to Boston Properties, Inc.'s ("BXP's"), the Issuer's sole general partner's, 2021 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The 10,390 LTIP Units earned pursuant to the Program vested in full upon being earned. Each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit is subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F2 · derivative.expiration_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F4 · balance_after: Reflects the forfeiture of 8,689 LTIP Units originally issued on February 2, 2021 pursuant to the Program that were previously reported as beneficially owned by the Reporting Person, but remained subject to certain performance-based vesting hurdles based on the Issuer's total shareholder return for the period from February 2, 2021 to February 1, 2024.

SEC source: 0001246991-24-000180 · wk-form4_1707924518.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 211,050

Underlying: Common Stock, par value $.01 · 10,390 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, earned (i.e., for which the performance-based hurdles have been met) pursuant to the Issuer's 2021 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: 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 the Issuer's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: 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 the Issuer's common stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The 10,390 LTIP Units earned pursuant to the Program vested in full upon being earned. Each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit is subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F2 · derivative.expiration_date: 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 the Issuer's common stock. LTIP Units have no expiration date.

F4 · balance_after: Reflects the forfeiture of 8,689 LTIP Units originally issued on February 2, 2021 pursuant to the Program that were previously reported as beneficially owned by the Reporting Person, but remained subject to certain performance-based vesting hurdles based on the Issuer's total shareholder return for the period from February 2, 2021 to February 1, 2024.

SEC source: 0001246991-24-000148 · wk-form4_1707425089.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 209,349

Underlying: Common OP Units · 13,829 shares

Expires not disclosed

F1 · security: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2024 Multi-Year Long-Term Incentive Program (the "2024 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2024 Multi-Year Long-Term Incentive Program (the "2024 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2024 Multi-Year Long-Term Incentive Program (the "2024 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F1 · derivative.expiration_date: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2024 Multi-Year Long-Term Incentive Program (the "2024 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F2 · derivative.expiration_date: The 13,829 LTIP Units may be earned based on the achievement of certain performance criteria based on BXP's total shareholder return over a three-year performance period ending on February 5, 2027. Any LTIP Units earned pursuant to the 2024 Program will vest in full on February 5, 2027, with each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

SEC source: 0001246991-24-000150 · wk-form4_1707425116.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 209,349

Underlying: Common Stock, par value $.01 · 13,829 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, granted pursuant to the Issuer's 2024 Multi-Year Long-Term Incentive Program (the "2024 Program"). 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, granted pursuant to the Issuer's 2024 Multi-Year Long-Term Incentive Program (the "2024 Program"). 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, granted pursuant to the Issuer's 2024 Multi-Year Long-Term Incentive Program (the "2024 Program"). 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 13,829 LTIP Units may be earned based on the achievement of certain performance criteria based on the Issuer's total shareholder return over a three-year performance period ending on February 5, 2027. Any LTIP Units earned pursuant to the 2024 Program will vest in full on February 5, 2027, with each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, granted pursuant to the Issuer's 2024 Multi-Year Long-Term Incentive Program (the "2024 Program"). 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: 0001246991-24-000120 · wk-form4_1707242188.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 195,520

Underlying: Common OP Units · 9,813 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in the Issuer issued pursuant to Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in the Issuer issued pursuant to Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in the Issuer issued pursuant to Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's 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 the Issuer issued pursuant to Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's 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: 0001246991-24-000022 · 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: 0001246991-23-000122 · wf-form4_167649406662856.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 185,707

Underlying: Common OP Units · 3,596 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in the Issuer earned (i.e., for which the performance-based hurdles have been met) pursuant to Boston Properties, Inc.'s ("BXP's"), the Issuer's sole general partner's, 2020 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The 3,596 LTIP Units earned pursuant to the Program vested 50% upon being earned and 50% will vest on February 3, 2024.

F2 · derivative.expiration_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock, except that BXP may, at its election, acquire each Common OP Unit so presented for one share of BXP's common stock. LTIP Units have no expiration date.

SEC source: 0001246991-23-000121 · wf-form4_167649403805369.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 185,707

Underlying: Common Stock, par value $0.01 · 3,596 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, earned (i.e., for which the performance-based hurdles have been met) pursuant to the Issuer's 2020 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: 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 the Issuer's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: 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 the Issuer's common stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The 3,596 LTIP Units earned pursuant to the Program vested 50% upon being earned and 50% will vest on February 3, 2024.

F2 · derivative.expiration_date: 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 the Issuer's common stock. LTIP Units have no expiration date.

SEC source: 0001246991-23-000095 · wf-form4_167597204126184.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 182,111

Underlying: Common OP Units · 12,770 shares

Expires not disclosed

F1 · security: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2023 Multi-Year Long-Term Incentive Program (the "2023 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2023 Multi-Year Long-Term Incentive Program (the "2023 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2023 Multi-Year Long-Term Incentive Program (the "2023 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 12,770 LTIP Units may be earned based on the achievement of certain performance criteria based on BXP's total shareholder return over a three-year performance period ending on February 6, 2026. Any LTIP Units earned pursuant to the 2023 Program will vest in full on February 6, 2026, with each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F1 · derivative.expiration_date: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2023 Multi-Year Long-Term Incentive Program (the "2023 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

SEC source: 0001246991-23-000094 · wf-form4_167597202211176.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 182,111

Underlying: Common Stock, par value $0.01 · 12,770 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, granted pursuant to the Issuer's 2023 Multi-Year Long-Term Incentive Program (the "2023 Program"). 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, granted pursuant to the Issuer's 2023 Multi-Year Long-Term Incentive Program (the "2023 Program"). 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, granted pursuant to the Issuer's 2023 Multi-Year Long-Term Incentive Program (the "2023 Program"). 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 12,770 LTIP Units may be earned based on the achievement of certain performance criteria based on the Issuer's total shareholder return over a three-year performance period ending on February 6, 2026. Any LTIP Units earned pursuant to the 2023 Program will vest in full on February 6, 2026, with each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, granted pursuant to the Issuer's 2023 Multi-Year Long-Term Incentive Program (the "2023 Program"). 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: 0001246991-23-000043 · wf-form4_167579962427997.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 169,341

Underlying: Common OP Units · 11,178 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in the Issuer issued as long term incentive compensation pursuant to Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents units of limited partnership interest in the Issuer issued as long term incentive compensation pursuant to Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents units of limited partnership interest in the Issuer issued as long term incentive compensation pursuant to Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 11,178 LTIP Units vest in four equal annual installments beginning on January 15, 2024.

F1 · derivative.expiration_date: Represents units of limited partnership interest in the Issuer issued as long term incentive compensation pursuant to Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, equity based incentive programs ("LTIP Units"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of BXP's common stock except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of BXP's common stock. LTIP Units have no expiration date.

SEC source: 0001246991-23-000054 · wf-form4_167579985629172.xml · derivative · entry 2

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 169,341

Underlying: Common Stock, par value $0.01 · 11,178 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 as long term incentive compensation ("LTIP Units") 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 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 as long term incentive compensation ("LTIP Units") 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 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 as long term incentive compensation ("LTIP Units") 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 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 11,178 LTIP Units vest in four equal annual installments beginning on January 15, 2024.

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 as long term incentive compensation ("LTIP Units") 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 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: 0001246991-23-000054 · wf-form4_167579985629172.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,408

SEC source: 0001246991-23-000019 · wf-form4_167399233624960.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,682

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

SEC source: 0001246991-22-000131 · wf-form4_164513822024448.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 158,163

Underlying: Common OP Units · 5,503 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in the Issuer earned (i.e., for which the performance-based hurdles have been met) pursuant to Boston Properties, Inc.'s ("BXP's"), the Issuer's sole general partner's, 2019 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of Common Stock of BPI, except that BPI may, at its election, acquire each Common OP Unit so presented for one share of BPI's Common Stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of Common Stock of BPI, except that BPI may, at its election, acquire each Common OP Unit so presented for one share of BPI's Common Stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The 5,503 LTIP Units earned pursuant to the Program vested 50% upon being earned and 50% will vest on February 4, 2023.

F2 · derivative.expiration_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of Common Stock of BPI, except that BPI may, at its election, acquire each Common OP Unit so presented for one share of BPI's Common Stock. LTIP Units have no expiration date.

SEC source: 0001246991-22-000124 · wf-form4_164513803493714.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 158,163

Underlying: Common Stock, par value $0.01 · 5,503 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, earned (i.e., for which the performance-based hurdles have been met) pursuant to the Issuer's 2019 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: 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: 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.

F3 · derivative.exercise_date: The 5,503 LTIP Units earned pursuant to the Program vested 50% upon being earned and 50% will vest on February 4, 2023.

F2 · derivative.expiration_date: 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: 0001246991-22-000098 · wf-form4_164391352133950.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 152,660

Underlying: Common OP Units · 7,865 shares

Expires not disclosed

F1 · security: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2022 Multi-Year Long-Term Incentive Program (the "2022 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2022 Multi-Year Long-Term Incentive Program (the "2022 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2022 Multi-Year Long-Term Incentive Program (the "2022 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 7,865 LTIP Units may be earned based on the achievement of certain performance criteria based on BXP's total shareholder return over a three-year performance period ending on January 31, 2025. Any LTIP Units earned pursuant to the 2022 Program will vest in full on January 31, 2025, with each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F1 · derivative.expiration_date: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BXP"), the Issuer's general partner, 2022 Multi-Year Long-Term Incentive Program (the "2022 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BXP except that BXP may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BXP. LTIP Units have no expiration date.

SEC source: 0001246991-22-000097 · wf-form4_164391350473764.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 152,660

Underlying: Common Stock, par value $0.01 · 7,865 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, granted pursuant to the Issuer's 2022 Multi-Year Long-Term Incentive Program (the "2022 Program"). 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, granted pursuant to the Issuer's 2022 Multi-Year Long-Term Incentive Program (the "2022 Program"). 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, granted pursuant to the Issuer's 2022 Multi-Year Long-Term Incentive Program (the "2022 Program"). 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 7,865 LTIP Units may be earned based on the achievement of certain performance criteria based on the Issuer's total shareholder return over a three-year performance period ending on January 31, 2025. Any LTIP Units earned pursuant to the 2022 Program will vest in full on January 31, 2025, with each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, granted pursuant to the Issuer's 2022 Multi-Year Long-Term Incentive Program (the "2022 Program"). 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: 0001246991-22-000049 · wf-form4_164374893373387.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 144,795

Underlying: Common OP Units · 8,781 shares

Expires not disclosed

F1 · security: Issued as long term incentive compensation pursuant to Boston Properties, Inc.'s ("BPI"), the Issuer's general partner, 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 the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BPI except that BPI may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BPI. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Issued as long term incentive compensation pursuant to Boston Properties, Inc.'s ("BPI"), the Issuer's general partner, 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 the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BPI except that BPI may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BPI. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Issued as long term incentive compensation pursuant to Boston Properties, Inc.'s ("BPI"), the Issuer's general partner, 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 the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BPI except that BPI may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BPI. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 8,781 LTIP Units vest in four equal annual installments beginning on January 15, 2023.

F1 · derivative.expiration_date: Issued as long term incentive compensation pursuant to Boston Properties, Inc.'s ("BPI"), the Issuer's general partner, 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 the Issuer or the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BPI except that BPI may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BPI. LTIP Units have no expiration date.

SEC source: 0001246991-22-000048 · wf-form4_164374891302536.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 144,795

Underlying: Common Stock, par value $0.01 · 8,781 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 as long term incentive compensation ("LTIP Units") 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 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 as long term incentive compensation ("LTIP Units") 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 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 as long term incentive compensation ("LTIP Units") 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 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 8,781 LTIP Units vest in four equal annual installments beginning on January 15, 2023.

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 as long term incentive compensation ("LTIP Units") 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 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: 0001246991-22-000022 · wf-form4_164260455848355.xml · nonDerivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,007

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

SEC source: 0001246991-21-000126 · wf-form4_161359346969368.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 136,014

Underlying: Common OP Units · 3,533 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in the Issuer earned (i.e., for which the performance-based hurdles have been met) pursuant to Boston Properties, Inc.'s ("BPI's"), the Issuer's sole general partner's, 2018 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of Common Stock of BPI, except that BPI may, at its election, acquire each Common OP Unit so presented for one share of BPI's Common Stock. LTIP Units have no expiration date.

F2 · derivative.exercise_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of Common Stock of BPI, except that BPI may, at its election, acquire each Common OP Unit so presented for one share of BPI's Common Stock. LTIP Units have no expiration date.

F3 · derivative.exercise_date: The 3,533 LTIP Units earned pursuant to the Program vested 50% upon being earned and 50% will vest on February 5, 2022.

F2 · derivative.expiration_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of Common Stock of BPI, except that BPI may, at its election, acquire each Common OP Unit so presented for one share of BPI's Common Stock. LTIP Units have no expiration date.

SEC source: 0001246991-21-000117 · wf-form4_161359326766626.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 136,014

Underlying: Common Stock, par value $0.01 · 3,533 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, earned (i.e., for which the performance-based hurdles have been met) pursuant to the Issuer's 2017 Multi-Year Long-Term Incentive Program (the "Program").

F2 · derivative.exercise_price: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the 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: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the 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.

F3 · derivative.exercise_date: The 3,533 LTIP Units earned pursuant to the Program vested 50% upon being earned and 50% will vest on February 5, 2022.

F2 · derivative.expiration_date: Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the 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: 0001246991-21-000086 · wf-form4_161247224419045.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO of GP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 132,481

Underlying: Common OP Units · 12,152 shares

Expires not disclosed

F1 · security: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BPI"), the Issuer's general partner, 2021 Multi-Year Long-Term Incentive Program (the "2021 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit").Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BPI except that BPI may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BPI. LTIP Units have no expiration date.

F1 · derivative.exercise_price: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BPI"), the Issuer's general partner, 2021 Multi-Year Long-Term Incentive Program (the "2021 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit").Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BPI except that BPI may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BPI. LTIP Units have no expiration date.

F1 · derivative.exercise_date: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BPI"), the Issuer's general partner, 2021 Multi-Year Long-Term Incentive Program (the "2021 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit").Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BPI except that BPI may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BPI. LTIP Units have no expiration date.

F2 · derivative.exercise_date: The 12,152 LTIP Units may be earned based on the achievement of certain performance criteria based on BPI's total shareholder return over a three-year performance period ending on February 1, 2024. Any LTIP Units earned pursuant to the 2021 Program will vest in full on February 1, 2024, with each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F1 · derivative.expiration_date: Represents LTIP Units granted pursuant to the Boston Properties, Inc.'s ("BPI"), the Issuer's general partner, 2021 Multi-Year Long-Term Incentive Program (the "2021 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in the Issuer ("Common OP Unit").Each Common OP Unit acquired upon conversion of an LTIP Unit may be redeemed, at the election of the holder, for cash equal to the then fair market value of a share of common stock of BPI except that BPI may, at its election, acquire each Common OP Unit so presented for redemption for one share of common stock of BPI. LTIP Units have no expiration date.

SEC source: 0001246991-21-000085 · wf-form4_161247222614262.xml · derivative · entry 1

LABELLE MICHAEL E · CIK 0001419045 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 132,481

Underlying: Common Stock, par value $0.01 · 12,152 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, granted pursuant to the Issuer's 2021 Multi-Year Long-Term Incentive Program (the "2021 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the 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, granted pursuant to the Issuer's 2021 Multi-Year Long-Term Incentive Program (the "2021 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the 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, granted pursuant to the Issuer's 2021 Multi-Year Long-Term Incentive Program (the "2021 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the 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 12,152 LTIP Units may be earned based on the achievement of certain performance criteria based on the Issuer's total shareholder return over a three-year performance period ending on February 1, 2024. Any LTIP Units earned pursuant to the 2021 Program will vest in full on February 1, 2024, with each earned LTIP Unit and Common OP Unit acquired upon conversion of such LTIP Unit subject to an additional post-vesting holding period pursuant to which such LTIP Unit and Common OP Unit generally may not be transferred, and the redemption right associated with the Common OP Unit may not be exercised, until one year after the vesting date.

F1 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, granted pursuant to the Issuer's 2021 Multi-Year Long-Term Incentive Program (the "2021 Program"). Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the 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.