BXP

SEC source: 0001246991-22-000011 · wf-form4_164130859204355.xml · derivative · entry 1

Ayotte Kelly · CIK 0001702559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,296.93

Underlying: Common Stock, par value $0.01 · 260.46 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 25.96 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on October 29, 2021.

SEC source: 0001246991-21-000264 · wf-form4_164079225508394.xml · nonDerivative · entry 1

KIPP MARY E · CIK 0001478538 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 542

SEC source: 0001246991-21-000255 · wf-form4_163778004332410.xml · derivative · entry 6

LINDE DOUGLAS T · CIK 0001217102 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $0.01 · 34,476 shares

Expires 2022-02-03

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

F3 · derivative.exercise_price: In (1) January 2014, the Issuer paid a special dividend of $2.25 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2013, (2) January 2015, the Issuer paid a special dividend of $4.50 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2014 and (3) January 2016, the Issuer paid a special dividend of $1.25 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2015. In connection with these special dividends, the Issuer's Board of Directors adjusted all options that were awarded, but not exercised, prior to the ex-dividend date for each special dividend to account for the effect of each special dividend. The number of shares subject to each such option was increased and the exercise price correspondingly decreased such that each option had the same fair value to the holder before and after giving effect to the payment of each special dividend.

F4 · derivative.exercise_price: Pursuant to the adjustments described in Footnote 3, the number of shares underlying Mr. Linde's options increased by (1) 714 from 32,295 to 33,009 in January 2014, (2) 1,135 from 33,009 to 34,144 in January 2015 and (3) 332 from 34,144 to 34,476 in January 2016 and the per share exercise price was correspondingly decreased.

F5 · derivative.exercise_date: The option vested in four equal annual installments beginning on January 15, 2013.

F3 · derivative.underlying_shares: In (1) January 2014, the Issuer paid a special dividend of $2.25 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2013, (2) January 2015, the Issuer paid a special dividend of $4.50 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2014 and (3) January 2016, the Issuer paid a special dividend of $1.25 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2015. In connection with these special dividends, the Issuer's Board of Directors adjusted all options that were awarded, but not exercised, prior to the ex-dividend date for each special dividend to account for the effect of each special dividend. The number of shares subject to each such option was increased and the exercise price correspondingly decreased such that each option had the same fair value to the holder before and after giving effect to the payment of each special dividend.

F4 · derivative.underlying_shares: Pursuant to the adjustments described in Footnote 3, the number of shares underlying Mr. Linde's options increased by (1) 714 from 32,295 to 33,009 in January 2014, (2) 1,135 from 33,009 to 34,144 in January 2015 and (3) 332 from 34,144 to 34,476 in January 2016 and the per share exercise price was correspondingly decreased.

SEC source: 0001246991-21-000255 · wf-form4_163778004332410.xml · nonDerivative · entry 3

LINDE DOUGLAS T · CIK 0001217102 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 180,762.7471

F2 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $118.690 to $119.615, 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: 0001246991-21-000255 · wf-form4_163778004332410.xml · nonDerivative · entry 2

LINDE DOUGLAS T · CIK 0001217102 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 191,802.7471

F1 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $117.690 to $118.685, 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: 0001246991-21-000255 · wf-form4_163778004332410.xml · nonDerivative · entry 1

LINDE DOUGLAS T · CIK 0001217102 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 215,238.7471

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.

SEC source: 0001246991-21-000252 · wf-form4_163701319246936.xml · nonDerivative · entry 4

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Burt Family Trust - 1993

Disclosed balance after: 0

SEC source: 0001246991-21-000252 · wf-form4_163701319246936.xml · nonDerivative · entry 3

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Burt Family Trust - 1993

Disclosed balance after: 2,116

SEC source: 0001246991-21-000252 · wf-form4_163701319246936.xml · nonDerivative · entry 2

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

SEC source: 0001246991-21-000252 · wf-form4_163701319246936.xml · derivative · entry 7

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $0.01 · 2,116 shares

Expires not disclosed

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

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

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

F1 · kind: 2,116 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 2,116 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the Reporting Person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

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

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

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

SEC source: 0001246991-21-000252 · wf-form4_163701319246936.xml · derivative · entry 6

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,116

Underlying: Common Stock, par value $0.01 · 2,116 shares

Expires not disclosed

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

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

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

F1 · kind: 2,116 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 2,116 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the Reporting Person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

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

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

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

SEC source: 0001246991-21-000252 · wf-form4_163701319246936.xml · derivative · entry 5

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,011

Underlying: Common Stock, par value $0.01 · 2,116 shares

Expires not disclosed

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

F2 · security: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued as long term incentive compensation ("LTIP Units") pursuant to the Issuer's equity based incentive programs. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of BPLP or the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of Common Stock. LTIP Units have no expiration date.

F2 · derivative.exercise_price: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued as long term incentive compensation ("LTIP Units") pursuant to the Issuer's equity based incentive programs. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of BPLP or the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of Common Stock. LTIP Units have no expiration date.

F1 · kind: 2,116 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the Reporting Person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F2 · derivative.exercise_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued as long term incentive compensation ("LTIP Units") pursuant to the Issuer's equity based incentive programs. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of BPLP or the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of Common Stock. LTIP Units have no expiration date.

F2 · derivative.expiration_date: Represents units of limited partnership interest in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the general partner, issued as long term incentive compensation ("LTIP Units") pursuant to the Issuer's equity based incentive programs. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of BPLP or the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's Common Stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of Common Stock. LTIP Units have no expiration date.

SEC source: 0001246991-21-000252 · wf-form4_163701319246936.xml · nonDerivative · entry 1

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,116

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

F1 · price: 2,116 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 0001246991-21-000249 · wf-form4_163672929830614.xml · derivative · entry 2

KOOP BRYAN J · CIK 0001217098 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $0.01 · 7,067 shares

Expires 2022-02-03

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 · derivative.exercise_price: In (1) January 2014, the Issuer paid a special dividend of $2.25 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2013, (2) January 2015, the Issuer paid a special dividend of $4.50 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2014 and (3) January 2016, the Issuer paid a special dividend of $1.25 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2015. In connection with these special dividends, the Issuer's Board of Directors adjusted all options that were awarded, but not exercised, prior to the ex-dividend date for each special dividend to account for the effect of each special dividend. The number of shares subject to each such option was increased and the exercise price correspondingly decreased such that each option had the same fair value to the holder before and after giving effect to the payment of each special dividend.

F3 · derivative.exercise_price: Pursuant to the adjustments described in Footnote 2, the number of shares underlying the Reporting Person's options increased by (1) 146 from 6,621 to 6,767 in January 2014, (2) 232 from 6,767 to 6,999 in January 2015 and (3) 68 from 6,999 to 7,067 in January 2016 and the per share exercise price was correspondingly decreased.

F4 · derivative.exercise_date: The option vested in four equal annual installments beginning on January 15, 2013.

F2 · derivative.underlying_shares: In (1) January 2014, the Issuer paid a special dividend of $2.25 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2013, (2) January 2015, the Issuer paid a special dividend of $4.50 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2014 and (3) January 2016, the Issuer paid a special dividend of $1.25 per share of Common Stock to all stockholders of record as of the close of business on December 31, 2015. In connection with these special dividends, the Issuer's Board of Directors adjusted all options that were awarded, but not exercised, prior to the ex-dividend date for each special dividend to account for the effect of each special dividend. The number of shares subject to each such option was increased and the exercise price correspondingly decreased such that each option had the same fair value to the holder before and after giving effect to the payment of each special dividend.

F3 · derivative.underlying_shares: Pursuant to the adjustments described in Footnote 2, the number of shares underlying the Reporting Person's options increased by (1) 146 from 6,621 to 6,767 in January 2014, (2) 232 from 6,767 to 6,999 in January 2015 and (3) 68 from 6,999 to 7,067 in January 2016 and the per share exercise price was correspondingly decreased.

SEC source: 0001246991-21-000249 · wf-form4_163672929830614.xml · nonDerivative · entry 1

KOOP BRYAN J · CIK 0001217098 · Executive Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,751.7551

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 · balance_after: Includes 99.9847 shares of Common Stock which the Reporting Person acquired in July 2021 pursuant to the Boston Properties, Inc. 1999 Non-Qualified Employee Stock Purchase Plan, as amended.

SEC source: 0001246991-21-000247 · wf-form4_163655458452994.xml · nonDerivative · entry 1

Stroman John J · CIK 0001862860 · Senior Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $118.235 to $118.30, 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: 0001246991-21-000245 · wf-form4_163337031225897.xml · derivative · entry 1

WALTON WILLIAM H III · CIK 0001058795 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,302.24

Underlying: Common Stock, par value $0.01 · 219.2 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 17.25 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 30, 2021.

SEC source: 0001246991-21-000244 · wf-form4_163337029903624.xml · derivative · entry 1

TWARDOCK DAVID A · CIK 0001229891 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,333.73

Underlying: Common Stock, par value $0.01 · 299.95 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 240.39 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 30, 2021.

SEC source: 0001246991-21-000243 · wf-form4_163337028127571.xml · derivative · entry 1

LUSTIG MATTHEW J · CIK 0001203367 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,720.91

Underlying: Common Stock, par value $0.01 · 253.81 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 78.39 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 30, 2021.

SEC source: 0001246991-21-000242 · wf-form4_163337026769757.xml · derivative · entry 1

KLEIN JOEL · CIK 0001166832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,535.08

Underlying: Common Stock, par value $0.01 · 426.86 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 83.69 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 30, 2021.

SEC source: 0001246991-21-000241 · wf-form4_163337025252366.xml · derivative · entry 1

Einiger Carol B. · CIK 0001289668 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,265.99

Underlying: Common Stock, par value $0.01 · 242.27 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 182.35 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 30, 2021.

SEC source: 0001246991-21-000239 · wf-form4_163337022144311.xml · derivative · entry 1

Ayotte Kelly · CIK 0001702559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,010.51

Underlying: Common Stock, par value $0.01 · 276.88 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 22.63 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 30, 2021.

SEC source: 0001246991-21-000240 · wf-form4_163337023653962.xml · derivative · entry 1

DUNCAN BRUCE W · CIK 0001105577 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,326.62

Underlying: Common Stock, par value $0.01 · 253.81 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 Plan") to non-employee directors who elected to receive Phantom Stock Units in lieu of directorcash compensation fees. The Phantom Stock Units are to be settled in shares of 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 25.44 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on July 30, 2021.

SEC source: 0001246991-21-000231 · wf-form4_163104950685198.xml · nonDerivative · entry 2

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: Not disclosed

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 $113.28 to $114.16, 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: 0001246991-21-000231 · wf-form4_163104950685198.xml · nonDerivative · entry 1

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,410

F1 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $112.26 to $113.26, 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: 0001246991-21-000229 · wf-form4_163042517285537.xml · nonDerivative · entry 1

Otteni Peter V · CIK 0001862920 · Senior Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · price: Represents the weighted average sale price. These shares were sold in multiple transactions at sale prices ranging from $113.31 to $113.43, 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: 0001246991-21-000226 · wf-form4_162870236292932.xml · derivative · entry 2

Otteni Peter V · CIK 0001862920 · Senior Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $0.01 · 5,027 shares

Expires not disclosed

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

F2 · security: Represents 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 · 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: 5,027 of the Reporting Person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were redeemed for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

F1 · price: 5,027 of the Reporting Person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were redeemed for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

F2 · 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 · 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.

F2 · 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: 0001246991-21-000226 · wf-form4_162870236292932.xml · nonDerivative · entry 1

Otteni Peter V · CIK 0001862920 · Senior Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,027

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: 5,027 of the Reporting Person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were redeemed for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

F1 · price: 5,027 of the Reporting Person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were redeemed for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

SEC source: 0001246991-21-000223 · wf-form4_162517147790667.xml · derivative · entry 1

WALTON WILLIAM H III · CIK 0001058795 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,065.79

Underlying: Common Stock, par value $0.01 · 204.46 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 16.53 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2021.

SEC source: 0001246991-21-000222 · wf-form4_162517144544221.xml · derivative · entry 1

TWARDOCK DAVID A · CIK 0001229891 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,793.39

Underlying: Common Stock, par value $0.01 · 283.51 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 253.24 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2021.

SEC source: 0001246991-21-000220 · wf-form4_162517136925634.xml · derivative · entry 1

KLEIN JOEL · CIK 0001166832 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,024.53

Underlying: Common Stock, par value $0.01 · 400.81 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 85.48 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2021.

SEC source: 0001246991-21-000221 · wf-form4_162517141363708.xml · derivative · entry 1

LUSTIG MATTHEW J · CIK 0001203367 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,388.71

Underlying: Common Stock, par value $0.01 · 237.18 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 81.29 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2021.

SEC source: 0001246991-21-000217 · wf-form4_162517114481923.xml · derivative · entry 1

Ayotte Kelly · CIK 0001702559 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,711

Underlying: Common Stock, par value $0.01 · 259 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 21.78 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2021.

SEC source: 0001246991-21-000219 · wf-form4_162517129956220.xml · derivative · entry 1

Einiger Carol B. · CIK 0001289668 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,841.37

Underlying: Common Stock, par value $0.01 · 226.27 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 191.99 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2021.

SEC source: 0001246991-21-000218 · wf-form4_162517121883631.xml · derivative · entry 1

DUNCAN BRUCE W · CIK 0001105577 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,047.37

Underlying: Common Stock, par value $0.01 · 237.18 shares

Expires not disclosed

F1 · derivative.exercise_price: The Phantom Stock Units convert to Common Stock on a 1-for-1 basis.

F2 · derivative.exercise_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F2 · derivative.expiration_date: The Phantom Stock Units are awarded under the Boston Properties, Inc. 2021 Stock Incentive Plan (the "2021 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 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 Boston Properties, Inc. Board of Directors. In addition, non-employee directors who elect a deferred payout following their retirement may elect to convert not less than 100% of their notional investment from Common Stock to a deemed investment in one or more measurement funds. This election may only be made after the director's service on the Board of Directors ends. A director's account that has been converted to measurement funds will be settled in cash instead of Common Stock.

F3 · balance_after: Includes 24.96 Phantom Stock Units received pursuant to dividend equivalent rights which were credited to the Reporting Person on April 30, 2021.

SEC source: 0001246991-21-000211 · wf-form4_162516442167241.xml · derivative · entry 2

Stroman John J · CIK 0001862860 · Senior Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $0.01 · 4,109 shares

Expires not disclosed

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

F2 · security: Represents 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 · 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: 4,109 of the Reporting Person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were redeemed for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

F1 · price: 4,109 of the Reporting Person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were redeemed for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

F2 · 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 · 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.

F2 · 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: 0001246991-21-000211 · wf-form4_162516442167241.xml · nonDerivative · entry 1

Stroman John J · CIK 0001862860 · Senior Vice President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,109

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: 4,109 of the Reporting Person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were redeemed for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

F1 · price: 4,109 of the Reporting Person's common units of limited partnership interest ("Common OP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were redeemed for an equal number of shares of the Issuer's Common Stock in accordance with BPLP's Partnership Agreement.

SEC source: 0001246991-21-000206 · wf-form4_162335447672200.xml · nonDerivative · entry 4

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Burt Family Trust - 1993

Disclosed balance after: 0

SEC source: 0001246991-21-000206 · wf-form4_162335447672200.xml · derivative · entry 7

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock, par value $0.01 · 2,000 shares

Expires not disclosed

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

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

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

F1 · kind: 2,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 2,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the Reporting Person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

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

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

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

SEC source: 0001246991-21-000206 · wf-form4_162335447672200.xml · derivative · entry 6

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,000

Underlying: Common Stock, par value $0.01 · 2,000 shares

Expires not disclosed

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

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

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

F1 · kind: 2,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 2,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the Reporting Person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

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

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

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

SEC source: 0001246991-21-000206 · wf-form4_162335447672200.xml · derivative · entry 5

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,127

Underlying: Common Stock, par value $0.01 · 2,000 shares

Expires not disclosed

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

F2 · security: Represents LTIP Units in BPLP, of which the Issuer is the general partner, 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 common stock. LTIP Units have no expiration date.

F2 · derivative.exercise_price: Represents LTIP Units in BPLP, of which the Issuer is the general partner, 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 common stock. LTIP Units have no expiration date.

F1 · kind: 2,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the Reporting Person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F2 · derivative.exercise_date: Represents LTIP Units in BPLP, of which the Issuer is the general partner, 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 common stock. LTIP Units have no expiration date.

F2 · derivative.expiration_date: Represents LTIP Units in BPLP, of which the Issuer is the general partner, 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 common stock. LTIP Units have no expiration date.

SEC source: 0001246991-21-000206 · wf-form4_162335447672200.xml · nonDerivative · entry 3

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Burt Family Trust - 1993

Disclosed balance after: 2,000

SEC source: 0001246991-21-000206 · wf-form4_162335447672200.xml · nonDerivative · entry 2

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

SEC source: 0001246991-21-000206 · wf-form4_162335447672200.xml · nonDerivative · entry 1

BURT FRANK D · CIK 0001217093 · SVP, CLO and Secretary

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,000

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

F1 · kind: 2,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 2,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 0001246991-21-000202 · wf-form4_162275004772046.xml · derivative · entry 4

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 88,805

Underlying: Common Stock, par value $0.01 · 40,000 shares

Expires not disclosed

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

F3 · derivative.exercise_price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at 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: 40,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 40,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the Reporting Person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F3 · price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at 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.

F3 · derivative.exercise_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at 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.

F3 · derivative.expiration_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at 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: 0001246991-21-000202 · wf-form4_162275004772046.xml · derivative · entry 3

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 128,805

Underlying: Common Stock, par value $0.01 · 40,000 shares

Expires not disclosed

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

F3 · derivative.exercise_price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at 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: 40,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 40,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the Reporting Person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

F3 · price: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at 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.

F3 · derivative.exercise_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at 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.

F3 · derivative.expiration_date: Represents Common OP Units in BPLP. Each Common OP Unit may be presented for redemption, at the election of the holder, for cash equal to fair market value of a share of the Issuer's common stock, except that the Issuer may, at 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: 0001246991-21-000202 · wf-form4_162275004772046.xml · derivative · entry 2

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 164,926

Underlying: Common Stock, par value $0.01 · 40,000 shares

Expires not disclosed

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

F2 · security: Represents LTIP Units in BPLP issued as long term incentive compensation pursuant to the Issuer's equity based incentive programs. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of BPLP or the holder, into a common unit of limited partnership interest ("Common OP Unit") in BPLP. 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_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 unit of limited partnership interest ("Common OP Unit") in BPLP. 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 · kind: 40,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole general partner, were converted into common units of limited partnership interest ("Common OP Units") in BPLP by the Reporting Person and the Common OP Units were redeemed for an equal number of shares of the Issuer's common stock in accordance with BPLP's Partnership Agreement.

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

SEC source: 0001246991-21-000202 · wf-form4_162275004772046.xml · nonDerivative · entry 1

RITCHEY RAYMOND A · CIK 0001219153 · Senior EVP

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,000

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

F1 · kind: 40,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 40,000 of the Reporting Person's units of limited partnership interest ("LTIP Units") in Boston Properties Limited Partnership ("BPLP"), of which the Issuer is the sole 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: 0001246991-21-000190 · wf-form4_162258261800542.xml · derivative · entry 1

WALTON WILLIAM H III · CIK 0001058795 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,134

Underlying: Common Stock, par value $0.01 · 1,285 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. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

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

F2 · derivative.exercise_date: The 1,285 LTIP Units will vest on the earlier of (i) May 27, 2022 and (ii) the date of the Issuer's 2022 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. Conditioned upon minimum allocations to the capital accounts of the LTIP Units for federal income tax purposes, each LTIP Unit may be converted, at the election of the holder, into a common unit of limited partnership interest in BPLP ("Common OP Unit"). Each Common OP Unit acquired upon conversion of an LTIP Unit may be presented for redemption, at the election of the holder, for cash equal to the then fair market value of a share of the Issuer's common stock, except that the Issuer may, at its election, acquire each Common OP Unit so presented for one share of common stock. LTIP Units have no expiration date.

SEC source: 0001246991-21-000199 · wf-form4_162258288288008.xml · nonDerivative · entry 1

TWARDOCK DAVID A · CIK 0001229891 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,895