CDP

SEC source: 0001628280-26-054686 · wk-form4_1786119537.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 139,264

Underlying: Common Shares · 1,000 shares

Expires not disclosed

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

F1 · kind: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000017 · wk-form4_1785419166.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,264

Underlying: Common Shares · 1,500 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.

F1 · kind: The reporting person redeemed 1500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000015 · wk-form4_1782488196.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 141,764

Underlying: Common Shares · 1,000 shares

Expires not disclosed

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

F1 · kind: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001143567-26-000018 · wk-form4_1780418874.xml · nonDerivative · entry 1

PICKETT C TAYLOR · CIK 0001143567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,188

F1 · price: Represents the weighted average of a range of sale prices from $31.975 to $32.350. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any shareholder of the Company, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001250536-26-000013 · wk-form4_1779999827.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,803

F1 · price: Represents the weighted average of a range of sale prices from $32.25 to $32.50. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any shareholder of the Company, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001718603-26-000004 · wk-form4_1779138998.xml · nonDerivative · entry 1

Trimberger Lisa G · CIK 0001718603 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,090

F1 · price: These restricted shares were granted as part of annual trustee compensation and will vest in one year from the grant.

SEC source: 0001947703-26-000003 · wk-form4_1779139580.xml · derivative · entry 1

Miller Essye B. · CIK 0001947703 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,803

Underlying: Common Shares · 3,803 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F4 · price: Issued as compensation for service on the Board of Trustees.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · derivative.exercise_date: The Profit Interest Units will vest on the first anniversary of the grant date, provided that the reporting person remains a trustee on such date.

F3 · derivative.expiration_date: The Profit Interest Units do not expire once vested.

SEC source: 0001637178-26-000003 · wk-form4_1779138966.xml · derivative · entry 1

Long Letitia A · CIK 0001637178 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,003

Underlying: Common Shares · 3,803 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F4 · price: Issued as compensation for service on the Board of Trustees.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · derivative.exercise_date: The Profit Interest Units will vest on the first anniversary of the grant date, provided that the reporting person remains a trustee on such date.

F3 · derivative.expiration_date: The Profit Interest Units do not expire once vested.

SEC source: 0001397459-26-000002 · wk-form4_1779138924.xml · derivative · entry 1

Owens Raymond Lee · CIK 0001397459 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,003

Underlying: Common Shares · 3,803 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties Trust, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F4 · price: Issued as compensation for service on the Board of Trustees

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties Trust, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · derivative.exercise_date: The Profit Interest Units will vest on the first anniversary of the grant date, provided that the reporting person remains a trustee on such date.

F3 · derivative.expiration_date: The Profit Interest Units do not expire once vested.

SEC source: 0001143567-26-000015 · wk-form4_1779138786.xml · derivative · entry 1

PICKETT C TAYLOR · CIK 0001143567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,126

Underlying: Common Shares · 7,511 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties , exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · shares: Consists of 3,803 shares received as the equity portion of compensation for his Board service and 3,708 shares received upon the election by the reporting person to receive common shares in lieu of cash for all or part of his annual retainer for Board service, consistent with a policy adopted by the Board with respect to the cash portion of compensation for Board service. By making such election, the reporting person received shares equal to the amount of cash compensation designated by the reporting person divided by the 15-day trailing average price of the common shares as of the grant date.

F5 · price: Received as compensation for Board service.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties , exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F3 · derivative.exercise_date: The Profit Interest Units will vest on the first anniversary of the grant date, provided that the reporting person remains a trustee on such date.

F4 · derivative.expiration_date: The Profit Interest Units do not expire once vested.

SEC source: 0001250536-26-000011 · wk-form4_1779138726.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,725

F1 · price: These restricted shares were granted as part of annual trustee compensation and will vest in one year from the grant date.

SEC source: 0001234375-26-000004 · wk-form4_1779138598.xml · derivative · entry 1

HAWKINS PHILIP L · CIK 0001234375 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,988

Underlying: Common Shares · 7,448 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · shares: Consists of 3,803 shares received as the equity portion of compensation for his Board service and 3,645 shares received upon the election by the reporting person to receive common shares in lieu of cash for all or part of his annual retainer for Board service, consistent with a policy adopted by the Board with respect to the cash portion of compensation for Board service. By making such election, the reporting person received shares equal to the amount of cash compensation designated by the reporting person divided by the 15-day trailing average price of the common shares as of the grant date.

F5 · price: Received as compensation for Board service.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F3 · derivative.exercise_date: The Profit Interest Units will vest on the first anniversary of the grant date, provided that the reporting person remains a trustee on such date.

F4 · derivative.expiration_date: The Profit Interest Units do not expire once vested.

SEC source: 0001250536-26-000009 · wk-form4_1778772036.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 142,764

Underlying: Common Shares · 500 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.

F1 · kind: The reporting person redeemed 500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000007 · wk-form4_1777576217.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,264

Underlying: Common Shares · 1,000 shares

Expires not disclosed

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

F1 · kind: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-26-000004 · form4-03042026_070328.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 144,264

Underlying: Common Shares · 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.

F1 · kind: The reporting person redeemed 2000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0002002965-26-000002 · form4-03032026_100305.xml · derivative · entry 2

Snider Britt A. · CIK 0002002965 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,529

Underlying: Common Shares · 3,734 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F3 · shares: Represents Profit Interest Units issued pursuant to the COPT Defense Properties 2017 Omnibus Equity and Incentive Plan.

F1 · price: Received as employment compensation.

F2 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F4 · derivative.exercise_date: The Profit Interest Units will vest in three equal installments over a three-year period.

F2 · derivative.expiration_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

SEC source: 0002002965-26-000002 · form4-03032026_100305.xml · nonDerivative · entry 1

Snider Britt A. · CIK 0002002965 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,203

F1 · price: Received as employment compensation.

SEC source: 0001169452-26-000004 · form4-03032026_100335.xml · derivative · entry 1

BUDORICK STEPHEN E · CIK 0001169452 · Director · PRESIDENT/CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,124,411

Underlying: Common Shares · 61,114 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to the COPT Defense Properties 2017 Omnibus Equity and Incentive Plan.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F3 · derivative.exercise_date: The Profit Interest Units will vest in three equal installments over a three-year period.

F1 · derivative.expiration_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

SEC source: 0001349211-26-000004 · form4-03032026_100324.xml · derivative · entry 2

Mifsud Anthony · CIK 0001349211 · EVP AND CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 322,600

Underlying: Common Shares · 8,149 shares

Expires not disclosed

F2 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F3 · shares: Represents Profit Interest Units issued pursuant to the COPT Defense Properties 2017 Omnibus Equity and Incentive Plan.

F1 · price: Received as employment compensation.

F2 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F4 · derivative.exercise_date: The Profit Interest Units will vest in three equal installments over a three-year period.

F2 · derivative.expiration_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

SEC source: 0001349211-26-000004 · form4-03032026_100324.xml · nonDerivative · entry 1

Mifsud Anthony · CIK 0001349211 · EVP AND CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,834

F1 · price: Received as employment compensation.

SEC source: 0001965764-26-000002 · form4-03032026_090317.xml · nonDerivative · entry 4

Myers Matthew T · CIK 0001965764 · SVP-CAO & CONTROLLER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,000

F1 · price: Received as employment compensation.

SEC source: 0001965764-26-000002 · form4-03032026_090317.xml · nonDerivative · entry 3

Myers Matthew T · CIK 0001965764 · SVP-CAO & CONTROLLER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,610

SEC source: 0001965764-26-000002 · form4-03032026_090317.xml · nonDerivative · entry 2

Myers Matthew T · CIK 0001965764 · SVP-CAO & CONTROLLER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,910

SEC source: 0001965764-26-000002 · form4-03032026_090317.xml · nonDerivative · entry 1

Myers Matthew T · CIK 0001965764 · SVP-CAO & CONTROLLER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,261

SEC source: 0001234375-26-000002 · form4-02242026_030205.xml · nonDerivative · entry 1

HAWKINS PHILIP L · CIK 0001234375 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,188

F1 · price: Represents the weighted average of a range of sale prices from $32.58 to $32.76. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any shareholder of the Company, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001250536-26-000002 · form4-02112026_070207.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,264

Underlying: Common Shares · 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.

F1 · kind: The reporting person redeemed 2000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001349211-26-000002 · form4-02062026_040253.xml · derivative · entry 1

Mifsud Anthony · CIK 0001349211 · EVP AND CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 314,451

Underlying: Common Shares · 55,217 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of it's capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to the COPT Defense Properties 2017 Omnibus Equity and Incentive Plan.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of it's capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F1 · derivative.expiration_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of it's capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

SEC source: 0001169452-26-000002 · form4-02062026_040231.xml · derivative · entry 1

BUDORICK STEPHEN E · CIK 0001169452 · Director · PRESIDENT/CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,063,297

Underlying: Common Shares · 179,704 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to the COPT Defense Properties 2017 Omnibus Equity and Incentive Plan.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F1 · derivative.expiration_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

SEC source: 0001250536-25-000009 · form4-12292025_021230.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 148,264

Underlying: Common Shares · 500 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.

F1 · kind: The reporting person redeemed 500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-25-000007 · form4-12042025_021232.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 148,764

Underlying: Common Shares · 1,500 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.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001965764-25-000003 · form4-12022025_101231.xml · nonDerivative · entry 1

Myers Matthew T · CIK 0001965764 · SVP-CAO & CONTROLLER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,560

SEC source: 0001349211-25-000005 · form4-11132025_081159.xml · derivative · entry 1

Mifsud Anthony · CIK 0001349211 · EVP AND CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 223,008

Underlying: Common Shares · 17,400 shares

Expires not disclosed

F1 · derivative.exercise_price: Common Units of COPT Defense Properties, L.P. the Issuer's operating partnership, are convertible upon issuance into an equal number of the common shares of beneficial interest of the Issuer or, at the election of the issuer, cash equal to the fair market value of such shares.

F1 · derivative.exercise_date: Common Units of COPT Defense Properties, L.P. the Issuer's operating partnership, are convertible upon issuance into an equal number of the common shares of beneficial interest of the Issuer or, at the election of the issuer, cash equal to the fair market value of such shares.

F2 · derivative.expiration_date: Common Units do not have an expiration date.

F3 · balance_after: Reflects Common Units received by the reporting person upon the conversion, in accordance with terms of the applicable grants, of previously reported Profit Interest Units received as employment compensation.

SEC source: 0001250536-25-000005 · form4-11042025_021115.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 150,264

Underlying: Common Shares · 2,500 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.

F1 · kind: The reporting person redeemed 2,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001250536-25-000003 · form4-09252025_080952.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,764

Underlying: Common Shares · 1,000 shares

Expires not disclosed

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

F1 · kind: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001718603-25-000007 · form4-09182025_090941.xml · nonDerivative · entry 2

Trimberger Lisa G · CIK 0001718603 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

F1 · balance_after: Shares disposed of were owned by limited liability company controlled by the reporting person and her spouse.

SEC source: 0001718603-25-000007 · form4-09182025_090941.xml · nonDerivative · entry 1

Trimberger Lisa G · CIK 0001718603 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,287

SEC source: 0001415889-25-023850 · form4-09082025_040930.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 153,764

Underlying: Common Shares · 1,500 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.

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,500 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-020963 · form4-08042025_080837.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 155,264

Underlying: Common Shares · 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.

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 2,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-016212 · form4-06092025_080609.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 157,264

Underlying: Common Shares · 1,000 shares

Expires not disclosed

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

F1 · kind: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 1,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 1,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-014118 · form4-05222025_080556.xml · derivative · entry 1

Long Letitia A · CIK 0001637178 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,200

Underlying: Common Shares · 3,922 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F4 · price: Issued as compensation for service on the Board of Trustees.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · derivative.exercise_date: The Profit Interest Units will vest on the first anniversary of the grant date, provided that the reporting person remains a trustee on such date.

F3 · derivative.expiration_date: The Profit Interest Units do not expire once vested.

SEC source: 0001415889-25-014122 · form4-05222025_080539.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,922

F1 · price: These restricted shares were granted as part of annual trustee compensation and will vest in one year from the grant date.

SEC source: 0001415889-25-014116 · form4-05222025_070511.xml · derivative · entry 1

Owens Raymond Lee · CIK 0001397459 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,200

Underlying: Common Shares · 3,922 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties Trust, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F4 · price: Issued as compensation for service on the Board of Trustees

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties Trust, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · derivative.exercise_date: The Profit Interest Units will vest on the first anniversary of the grant date, provided that the reporting person remains a trustee on such date.

F3 · derivative.expiration_date: The Profit Interest Units do not expire once vested.

SEC source: 0001415889-25-014114 · form4-05222025_070555.xml · nonDerivative · entry 1

Miller Essye B. · CIK 0001947703 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,673

F1 · price: These restricted shares were granted as part of annual trustee compensation and will vest upon Mrs. Miller's cessation of being a trustee.

SEC source: 0001415889-25-014112 · form4-05222025_070546.xml · derivative · entry 1

HAWKINS PHILIP L · CIK 0001234375 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,540

Underlying: Common Shares · 7,844 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · shares: Consists of 3,922 shares received as the equity portion of compensation for his Board service and 3,922 shares received upon the election by the reporting person to receive common shares in lieu of cash for all or part of his annual retainer for Board service, consistent with a policy adopted by the Board with respect to the cash portion of compensation for Board service. By making such election, the reporting person received shares equal to the amount of cash compensation designated by the reporting person divided by the 15-day trailing average price of the common shares as of the grant date.

F5 · price: Received as compensation for Board service.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F3 · derivative.exercise_date: The Profit Interest Units will vest on the first anniversary of the grant date, provided that the reporting person remains a trustee on such date.

F4 · derivative.expiration_date: The Profit Interest Units do not expire once vested.

SEC source: 0001415889-25-014109 · form4-05222025_070511.xml · derivative · entry 1

PICKETT C TAYLOR · CIK 0001143567 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,615

Underlying: Common Shares · 7,919 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties , exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · shares: Consists of 3,922 shares received as the equity portion of compensation for his Board service and 3,997 shares received upon the election by the reporting person to receive common shares in lieu of cash for all or part of his annual retainer for Board service, consistent with a policy adopted by the Board with respect to the cash portion of compensation for Board service. By making such election, the reporting person received shares equal to the amount of cash compensation designated by the reporting person divided by the 15-day trailing average price of the common shares as of the grant date.

F5 · price: Received as compensation for Board service.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties , exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F3 · derivative.exercise_date: The Profit Interest Units will vest on the first anniversary of the grant date, provided that the reporting person remains a trustee on such date.

F4 · derivative.expiration_date: The Profit Interest Units do not expire once vested.

SEC source: 0001415889-25-014106 · form4-05222025_070502.xml · nonDerivative · entry 1

Trimberger Lisa G · CIK 0001718603 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,183

F1 · price: These restricted shares were granted as part of annual trustee compensation and will vest in one year from the grant.

SEC source: 0001415889-25-013534 · form4-05192025_010525.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

SEC source: 0001415889-25-007475 · form4-03102025_020314.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 158,264

Underlying: Common Shares · 4,000 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.

F1 · kind: The reporting person redeemed 4,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 4,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

F2 · derivative.exercise_date: Common Units are convertible upon issuance.

F1 · derivative.expiration_date: The reporting person redeemed 4,000 common units of limited partnership interest ("Common Units") of COPT Defense Properties, L.P., of which the issuer is the general partner. Common Units are convertible into an equal number of the issuer's common shares of beneficial interest or, at the election of the issuer, cash equal to the fair market value of such shares. In the case of these 4,000 Common Units, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day average closing price of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001415889-25-006600 · form4-03042025_100355.xml · derivative · entry 1

BUDORICK STEPHEN E · CIK 0001169452 · Director · PRESIDENT/CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 883,593

Underlying: Common Shares · 61,561 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to the COPT Defense Properties 2017 Omnibus Equity and Incentive Plan.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F3 · derivative.exercise_date: The Profit Interest Units will vest in three equal installments over a three-year period.

F1 · derivative.expiration_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

SEC source: 0001415889-25-006596 · form4-03042025_100330.xml · derivative · entry 1

Snider Britt A. · CIK 0002002965 · EVP & COO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,795

Underlying: Common Shares · 15,823 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to the COPT Defense Properties 2017 Omnibus Equity and Incentive Plan.

F1 · derivative.exercise_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.

F3 · derivative.exercise_date: The Profit Interest Units will vest in three equal installments over a three-year period.

F1 · derivative.expiration_date: Each Profit Interest Unit will convert automatically into one share of beneficial interest, designated as a unit (an "OP Unit"), in COPT Defense Properties, L.P. when such Profit Interest Unit becomes vested and upon equalization of its capital account balance. OP Units are redeemable for cash, or, at the option of COPT Defense Properties, exchangeable for common shares of COPT Defense Properties, currently on a one-for-one basis.