BXP

SEC source: 0001246991-24-000285 · wk-form4_1719862702.xml · derivative · entry 1

KLEIN JOEL · CIK 0001166832 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,915.05

Underlying: Common Stock, par value $0.01 · 581.36 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to BXP, Inc. ("BXP") common stock on a 1-for-1 basis.

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

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

F3 · balance_after: Includes 270.19 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2024.

SEC source: 0001246991-24-000284 · wk-form4_1719862692.xml · derivative · entry 1

KIPP MARY E · CIK 0001478538 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,593.36

Underlying: Common Stock, par value $0.01 · 481.62 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to BXP, Inc. ("BXP") common stock on a 1-for-1 basis.

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

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

F3 · balance_after: Includes 64.09 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2024.

SEC source: 0001246991-24-000283 · wk-form4_1719862681.xml · derivative · entry 1

Einiger Carol B. · CIK 0001289668 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,097.62

Underlying: Common Stock, par value $0.01 · 435.21 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to BXP, Inc. ("BXP") common stock on a 1-for-1 basis.

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

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

F3 · balance_after: Includes 462.37 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2024.

SEC source: 0001246991-24-000282 · wk-form4_1719862671.xml · derivative · entry 1

DUNCAN BRUCE W · CIK 0001105577 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,727.28

Underlying: Common Stock, par value $0.01 · 546.33 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to BXP, Inc. ("BXP") common stock on a 1-for-1 basis.

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

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

F3 · balance_after: Includes 127.52 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2024.

SEC source: 0001246991-24-000256 · wk-form4_1717176296.xml · derivative · entry 1

WALTON WILLIAM H III · CIK 0001058795 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,863

Underlying: Common Stock, par value $0.01 · 2,835 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 2,835 LTIP Units will vest on the earlier of (i) May 30, 2025 and (ii) the date of the BXP's 2025 annual meeting of stockholders.

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: 0001246991-24-000266 · wk-form4_1717176432.xml · derivative · entry 1

LUSTIG MATTHEW J · CIK 0001203367 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,931

Underlying: Common Stock, par value $0.01 · 2,835 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 2,835 LTIP Units will vest on the earlier of (i) May 30, 2025 and (ii) the date of the BXP's 2025 annual meeting of stockholders.

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: 0001246991-24-000264 · wk-form4_1717176405.xml · derivative · entry 1

KIPP MARY E · CIK 0001478538 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,729

Underlying: Common Stock, par value $0.01 · 2,835 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 2,835 LTIP Units will vest on the earlier of (i) May 30, 2025 and (ii) the date of the BXP's 2025 annual meeting of stockholders.

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: 0001246991-24-000263 · wk-form4_1717176391.xml · derivative · entry 1

Einiger Carol B. · CIK 0001289668 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,983

Underlying: Common Stock, par value $0.01 · 2,835 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 2,835 LTIP Units will vest on the earlier of (i) May 30, 2025 and (ii) the date of the BXP's 2025 annual meeting of stockholders.

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: 0001246991-24-000261 · wk-form4_1717176364.xml · nonDerivative · entry 1

Hoskins Diane J · CIK 0001522588 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,163

SEC source: 0001246991-24-000260 · wk-form4_1717176349.xml · derivative · entry 1

KLEIN JOEL · CIK 0001166832 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,073

Underlying: Common Stock, par value $0.01 · 2,835 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 2,835 LTIP Units will vest on the earlier of (i) May 30, 2025 and (ii) the date of the BXP's 2025 annual meeting of stockholders.

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: 0001246991-24-000259 · wk-form4_1717176336.xml · derivative · entry 2

West Tony · CIK 0001626201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,417

Underlying: Common Stock, par value $0.01 · 1,417 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 1,417 LTIP Units will vest on the earlier of (i) May 30, 2025 and (ii) the date of the BXP's 2025 annual meeting of stockholders.

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: 0001246991-24-000259 · wk-form4_1717176336.xml · nonDerivative · entry 1

West Tony · CIK 0001626201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,808

SEC source: 0001246991-24-000255 · wk-form4_1717176282.xml · derivative · entry 1

DUNCAN BRUCE W · CIK 0001105577 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,973

Underlying: Common Stock, par value $0.01 · 2,835 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 2,835 LTIP Units will vest on the earlier of (i) May 30, 2025 and (ii) the date of the BXP's 2025 annual meeting of stockholders.

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: 0001246991-24-000252 · wk-form4_1717176235.xml · nonDerivative · entry 1

NAUGHTON TIMOTHY J · CIK 0001219700 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,835

SEC source: 0001246991-24-000220 · wk-form4_1711999441.xml · derivative · entry 1

WALTON WILLIAM H III · CIK 0001058795 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,076.99

Underlying: Common Stock, par value $0.01 · 363.65 shares

Expires not disclosed

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

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

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

F3 · balance_after: Includes 78.88 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on January 30, 2024.

SEC source: 0001246991-24-000223 · wk-form4_1711999496.xml · derivative · entry 1

Einiger Carol B. · CIK 0001289668 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,200.04

Underlying: Common Stock, par value $0.01 · 421.07 shares

Expires not disclosed

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

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

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

F3 · balance_after: Includes 397.34 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on January 30, 2024.

SEC source: 0001246991-24-000222 · wk-form4_1711999478.xml · derivative · entry 1

Ayotte Kelly · CIK 0001702559 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,028.31

Underlying: Common Stock, par value $0.01 · 555.05 shares

Expires not disclosed

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

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

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

F3 · balance_after: Includes 103.18 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on January 30, 2024.

SEC source: 0001246991-24-000221 · wk-form4_1711999457.xml · derivative · entry 1

KLEIN JOEL · CIK 0001166832 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,063.5

Underlying: Common Stock, par value $0.01 · 516.77 shares

Expires not disclosed

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

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

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

F3 · balance_after: Includes 228.46 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on January 30, 2024.

SEC source: 0001246991-24-000219 · wk-form4_1711999426.xml · derivative · entry 1

KIPP MARY E · CIK 0001478538 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,047.65

Underlying: Common Stock, par value $0.01 · 497.63 shares

Expires not disclosed

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

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

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

F3 · balance_after: Includes 49.01 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on January 30, 2024.

SEC source: 0001246991-24-000218 · wk-form4_1711999415.xml · derivative · entry 1

DUNCAN BRUCE W · CIK 0001105577 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,053.43

Underlying: Common Stock, par value $0.01 · 516.77 shares

Expires not disclosed

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

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

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

F3 · balance_after: Includes 104.06 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on January 30, 2024.

SEC source: 0001246991-24-000217 · wk-form4_1711999403.xml · derivative · entry 1

West Tony · CIK 0001626201 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,303.69

Underlying: Common Stock, par value $0.01 · 363.65 shares

Expires not disclosed

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

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

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

F3 · balance_after: Includes 12.98 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on January 30, 2024.

SEC source: 0001246991-24-000216 · wk-form4_1711999389.xml · derivative · entry 1

LUSTIG MATTHEW J · CIK 0001203367 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,399.37

Underlying: Common Stock, par value $0.01 · 459.35 shares

Expires not disclosed

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

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

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

F3 · balance_after: Includes 206.27 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on January 30, 2024.

SEC source: 0001246991-24-000205 · wk-form4_1709753778.xml · derivative · entry 6

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Raymond A. Ritchey 2008 Family Trust

Disclosed balance after: 17,115

Underlying: Common Stock, par value $0.01 · 14,150 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.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F2 · kind: The Raymond A. Ritchey 2008 Family Trust redeemed 14,150 Common OP Units in BPLP for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

F2 · price: The Raymond A. Ritchey 2008 Family Trust redeemed 14,150 Common OP Units in BPLP for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

SEC source: 0001246991-24-000205 · wk-form4_1709753778.xml · nonDerivative · entry 2

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Indirect · By The Raymond A. Ritchey 2008 Family Trust

Disclosed balance after: 14,150

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 · kind: The Raymond A. Ritchey 2008 Family Trust redeemed 14,150 Common OP Units in BPLP for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

F2 · price: The Raymond A. Ritchey 2008 Family Trust redeemed 14,150 Common OP Units in BPLP for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

SEC source: 0001246991-24-000207 · wk-form4_1709849330.xml · nonDerivative · entry 2

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F2 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $63.08 to $63.73, inclusive. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0001246991-24-000207 · wk-form4_1709849330.xml · nonDerivative · entry 1

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,059

F1 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $62.08 to $63.06, inclusive. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate price.

SEC source: 0001246991-24-000205 · wk-form4_1709753778.xml · derivative · entry 5

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,805

Underlying: Common Stock, par value $0.01 · 14,150 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.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F1 · kind: 14,150 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: 14,150 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.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

SEC source: 0001246991-24-000205 · wk-form4_1709753778.xml · derivative · entry 4

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 102,955

Underlying: Common Stock, par value $0.01 · 14,150 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.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F1 · kind: 14,150 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: 14,150 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.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

F4 · 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 fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at it's election, acquire each Common OP Unit so presented for redemption for one share of Common Stock. Common OP Units have no expiration date.

SEC source: 0001246991-24-000205 · wk-form4_1709753778.xml · derivative · entry 3

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 156,813

Underlying: Common Stock, par value $0.01 · 14,150 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 BPLP issued as long term incentive compensation pursuant to the Issuer's equity based incentive programs. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of BPLP or the holder, into a Common OP Unit. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of the Issuer's Common Stock. LTIP Units have no expiration date.

F3 · derivative.exercise_price: Represents LTIP Units in BPLP issued as long term incentive compensation pursuant to the Issuer's equity based incentive programs. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of BPLP or the holder, into a Common OP Unit. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of the Issuer's Common Stock. LTIP Units have no expiration date.

F1 · kind: 14,150 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 · derivative.exercise_date: Represents LTIP Units in BPLP issued as long term incentive compensation pursuant to the Issuer's equity based incentive programs. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of BPLP or the holder, into a Common OP Unit. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of the Issuer's Common Stock. LTIP Units have no expiration date.

F3 · derivative.expiration_date: Represents LTIP Units in BPLP issued as long term incentive compensation pursuant to the Issuer's equity based incentive programs. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of BPLP or the holder, into a Common OP Unit. Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of the Issuer's Common Stock. LTIP Units have no expiration date.

SEC source: 0001246991-24-000205 · wk-form4_1709753778.xml · nonDerivative · entry 1

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,150

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

F1 · kind: 14,150 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: 14,150 of the reporting person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the reporting person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

SEC source: 0001246991-24-000201 · wk-form4_1709325435.xml · nonDerivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 806

F1 · kind: Represents a bona fide gift of common stock by the reporting person to an unaffiliated non-profit organization.

SEC source: 0001246991-24-000197 · wk-form4_1707924737.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 770,806

Underlying: Common Stock, par value $.01 · 47,253 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, 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 47,253 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 39,513 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: 0001246991-24-000196 · wk-form4_1707924721.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,976

Underlying: Common Stock, par value $.01 · 724 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 724 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 596 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: 0001246991-24-000194 · wk-form4_1707924694.xml · derivative · entry 1

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 170,963

Underlying: Common Stock, par value $.01 · 21,292 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 21,292 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 17,504 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: 0001246991-24-000190 · wk-form4_1707924642.xml · derivative · entry 1

LINDE DOUGLAS T · CIK 0001217102 · Director · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 567,142

Underlying: Common Stock, par value $.01 · 26,842 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 26,842 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 22,445 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: 0001246991-24-000186 · wk-form4_1707924595.xml · derivative · entry 1

PESTER ROBERT E · CIK 0001217108 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 101,361

Underlying: Common Stock, par value $.01 · 6,851 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 6,851 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 5,632 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: 0001246991-24-000183 · wk-form4_1707924555.xml · derivative · entry 1

KOOP BRYAN J · CIK 0001217098 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,443

Underlying: Common Stock, par value $.01 · 8,633 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 8,633 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 7,097 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: 0001246991-24-000184 · wk-form4_1707924569.xml · derivative · entry 1

DIEHL RODNEY · CIK 0001255086 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,070

Underlying: Common Stock, par value $.01 · 1,690 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 1,690 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 1,389 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: 0001246991-24-000182 · wk-form4_1707924543.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,128.91

Underlying: Common Stock, par value $.01 · 475 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 475 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 397 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: 0001246991-24-000178 · wk-form4_1707924493.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,563

Underlying: Common Stock, par value $.01 · 579 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 579 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 476 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: 0001246991-24-000157 · wk-form4_1707425195.xml · derivative · entry 1

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 763,066

Underlying: Common Stock, par value $.01 · 60,849 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 60,849 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: 0001246991-24-000154 · wk-form4_1707425159.xml · derivative · entry 1

KOOP BRYAN J · CIK 0001217098 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 138,907

Underlying: Common Stock, par value $.01 · 8,851 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 8,851 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: 0001246991-24-000153 · wk-form4_1707425148.xml · derivative · entry 1

Stroman John J · CIK 0001862860 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,355

Underlying: Common Stock, par value $.01 · 8,687 shares

Expires not disclosed

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

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

F2 · derivative.exercise_date: The 8,687 LTIP Units vest 100% on January 15, 2028.

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: 0001246991-24-000152 · wk-form4_1707425137.xml · derivative · entry 1

LINDE DOUGLAS T · CIK 0001217102 · Director · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 562,745

Underlying: Common Stock, par value $.01 · 34,850 shares

Expires not disclosed

F1 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, 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 34,850 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: 0001246991-24-000150 · 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: 0001246991-24-000149 · wk-form4_1707425105.xml · derivative · entry 1

PESTER ROBERT E · CIK 0001217108 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,142

Underlying: Common Stock, par value $.01 · 3,872 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 3,872 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: 0001246991-24-000147 · wk-form4_1707425078.xml · derivative · entry 1

Otteni Peter V · CIK 0001862920 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,441

Underlying: Common Stock, par value $.01 · 7,897 shares

Expires not disclosed

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

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

F2 · derivative.exercise_date: The 7,897 LTIP Units vest 100% on January 15, 2028.

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: 0001246991-24-000143 · wk-form4_1707425031.xml · derivative · entry 1

DIEHL RODNEY · CIK 0001255086 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,769

Underlying: Common Stock, par value $.01 · 6,318 shares

Expires not disclosed

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

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

F2 · derivative.exercise_date: The 6,318 LTIP Units vest 100% on January 15, 2028.

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: 0001246991-24-000142 · wk-form4_1707425020.xml · derivative · entry 1

Spann Hilary J. · CIK 0001900835 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,822

Underlying: Common Stock, par value $.01 · 11,056 shares

Expires not disclosed

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 11,056 LTIP Units vest 100% on January 15, 2028.

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.