CDP

SEC source: 0001179110-22-001930 · edgar.xml · derivative · entry 1

BUDORICK STEPHEN E · CIK 0001169452 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 238,365

Underlying: Common Shares · 48,419 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to the Corporate Office Properties Trust 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

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

SEC source: 0001179110-22-001928 · edgar.xml · derivative · entry 1

Hartman Todd W. · CIK 0001834053 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,474

Underlying: Common Shares · 13,459 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to Corporate Office Properties Trust 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F3 · derivative.exercise_date: The Profit Interest Units will vest over three (3) years.

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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F3 · derivative.expiration_date: The Profit Interest Units will vest over three (3) years.

SEC source: 0001179110-22-001926 · edgar.xml · derivative · entry 1

Mifsud Anthony · CIK 0001349211 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,266

Underlying: Common Shares · 14,760 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to the Corporate Office Properties Trust 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

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

SEC source: 0001415889-22-003516 · form4a-03312022_020303.xml · derivative · entry 1

BUDORICK STEPHEN E · CIK 0001169452 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: Not disclosed

Underlying: Common Shares · Not disclosed 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F2 · reported_value: Represents Profit Interest Units issued pursuant to the Corporate Office Properties Trust 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

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

F4 · valueOwnedAfter: This form amends the report to update the amount of PIU's beneficially owned following the reported transaction.

SEC source: 0001179110-22-001707 · edgar.xml · nonDerivative · entry 1

PICKETT C TAYLOR · CIK 0001143567 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 20,000

F2 · price: The sales price $24.9661 represents a weighted average.

F1 · ownership.nature: Shares owned by family trust over which the reporting person has investment control.

SEC source: 0001179110-22-001469 · edgar.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 238,514

Underlying: Common Shares · 2,000 shares

Expires not disclosed

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office 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 Corporate Office 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: 0001179110-22-000765 · edgar.xml · derivative · entry 1

Mifsud Anthony · CIK 0001349211 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 76,506

Underlying: Common Shares · 37,578 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to the Corporate Office Properties Trust 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

SEC source: 0001179110-22-000764 · edgar.xml · derivative · entry 1

BUDORICK STEPHEN E · CIK 0001169452 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 238,365

Underlying: Common Shares · 118,526 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to the Corporate Office Properties Trust 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

SEC source: 0001179110-21-009872 · edgar.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 240,514

Underlying: Common Shares · 1,500 shares

Expires not disclosed

F1 · kind: The reporting person redeemed 1,500 common units of limited partnership interest ("Common Units") of Corporate Office 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 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing price of the issuer's common shares on the New York Stock Exchnage. 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 Corporate Office 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 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing price of the issuer's common shares on the New York Stock Exchnage. Common Units have no expiration date.

SEC source: 0001179110-21-008557 · edgar.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 242,014

Underlying: Common Shares · 2,000 shares

Expires not disclosed

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office 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 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing price of the issuer's common shares on the New York Stock Exchnage. 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 Corporate Office 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 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing price of the issuer's common shares on the New York Stock Exchnage. Common Units have no expiration date.

SEC source: 0001179110-21-006803 · edgar.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 244,014

Underlying: Common Shares · 2,000 shares

Expires not disclosed

F1 · kind: The reporting person redeemed 2,000 common units of limited partnership interest ("Common Units") of Corporate Office 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 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing price of the issuer's common shares on the New York Stock Exchnage. 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 Corporate Office 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 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing price of the issuer's common shares on the New York Stock Exchnage. Common Units have no expiration date.

SEC source: 0001179110-21-006506 · edgar.xml · nonDerivative · entry 1

KESLER STEVEN D · CIK 0001073344 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,568

F1 · price: Represents the weighted average of a range of sale prices per share from $30.06 to $30.08. 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: 0001179110-21-006482 · edgar.xml · nonDerivative · entry 1

KESLER STEVEN D · CIK 0001073344 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,568

F1 · price: Represents the weighted average of a range of sale prices per share from $29.52 to $29.705. 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: 0001179110-21-006438 · edgar.xml · nonDerivative · entry 1

JACOBSTEIN DAVID M · CIK 0001191856 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,567

F1 · price: Represents the weighted average of a range of sale prices per share from $28.0600 to $28.0900. 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: 0001179110-21-005997 · edgar.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,416

SEC source: 0001179110-21-005431 · edgar.xml · derivative · entry 1

PICKETT C TAYLOR · CIK 0001143567 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,834

Underlying: Common Shares · 3,416 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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: 0001179110-21-005445 · edgar.xml · derivative · entry 1

Long Letitia A · CIK 0001637178 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,416

Underlying: Common Shares · 3,416 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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: 0001179110-21-005429 · edgar.xml · nonDerivative · entry 1

JACOBSTEIN DAVID M · CIK 0001191856 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,567

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: 0001179110-21-005427 · edgar.xml · derivative · entry 1

HAWKINS PHILIP L · CIK 0001234375 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,834

Underlying: Common Shares · 3,416 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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: 0001179110-21-005424 · edgar.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,402

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: 0001179110-21-005421 · edgar.xml · nonDerivative · entry 1

BRADY THOMAS F · CIK 0001050747 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,412

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

SEC source: 0001179110-21-005419 · edgar.xml · nonDerivative · entry 1

KESLER STEVEN D · CIK 0001073344 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,568

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: 0001179110-21-005416 · edgar.xml · nonDerivative · entry 1

Trimberger Lisa G · CIK 0001718603 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,756

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: 0001179110-21-005414 · edgar.xml · derivative · entry 1

Owens Raymond Lee · CIK 0001397459 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,416

Underlying: Common Shares · 3,416 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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: 0001179110-21-005178 · edgar.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 246,014

Underlying: Common Shares · 3,000 shares

Expires not disclosed

F1 · kind: The reporting person redeemed 3,000 common units of limited partnership interest ("Common Units") of Corporate Office 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 3,000 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing prices 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 3,000 common units of limited partnership interest ("Common Units") of Corporate Office 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 3,000 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing prices of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001179110-21-005173 · edgar.xml · nonDerivative · entry 1

Thor Greg J · CIK 0001370086 · SVP--CAO & Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,859

SEC source: 0001179110-21-004829 · edgar.xml · derivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 249,014

Underlying: Common Shares · 3,500 shares

Expires not disclosed

F1 · kind: The reporting person redeemed 3,500 common units of limited partnership interest ("Common Units") of Corporate Office 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 3,500 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing prices 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 3,500 common units of limited partnership interest ("Common Units") of Corporate Office 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 3,500 shares, the issuer elected to pay cash upon the conversion of the reporting person's Common Units, based on the 10-day trailing average of the closing prices of the issuer's common shares on the New York Stock Exchange. Common Units have no expiration date.

SEC source: 0001179110-21-004827 · edgar.xml · nonDerivative · entry 1

Thor Greg J · CIK 0001370086 · SVP--CAO & Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,739

SEC source: 0001179110-21-004881 · edgar.xml · nonDerivative · entry 1

Trimberger Lisa G · CIK 0001718603 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

F3 · price: Represents the weighted average of a range of sale prices per share from $28.04 to $28.055. 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.

F1 · ownership.nature: Shares owned by a trust of which the reporting person is the sole beneficiary and the reporting person's spouse is the trustee.

SEC source: 0001179110-21-003564 · edgar.xml · nonDerivative · entry 1

Thor Greg J · CIK 0001370086 · SVP--CAO & Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,739

SEC source: 0001179110-21-003400 · edgar.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,986

SEC source: 0001179110-21-003304 · edgar.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,986

SEC source: 0001179110-21-003266 · edgar.xml · derivative · entry 2

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 252,514

Underlying: Common Shares · 3,500 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 · derivative.exercise_price: The reporting person redeemed 3,500 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

F1 · kind: The reporting person redeemed 3,500 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

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

F1 · derivative.expiration_date: The reporting person redeemed 3,500 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

SEC source: 0001179110-21-003266 · edgar.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,486

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 3,500 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

F1 · price: The reporting person redeemed 3,500 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

SEC source: 0001179110-21-003059 · edgar.xml · nonDerivative · entry 1

Owens Raymond Lee · CIK 0001397459 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 906

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

SEC source: 0001179110-21-002661 · edgar.xml · derivative · entry 2

BUDORICK STEPHEN E · CIK 0001169452 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 119,839

Underlying: Common Shares · 46,154 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

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

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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

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

SEC source: 0001179110-21-002661 · edgar.xml · nonDerivative · entry 1

BUDORICK STEPHEN E · CIK 0001169452 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 189,736

F1 · price: These shares were forfeited in a net share settlement in connection with restrictions laspsing on restricted shares.

SEC source: 0001179110-21-002625 · edgar.xml · derivative · entry 2

Mifsud Anthony · CIK 0001349211 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,928

Underlying: Common Shares · 14,752 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

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

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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

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

SEC source: 0001179110-21-002625 · edgar.xml · nonDerivative · entry 1

Mifsud Anthony · CIK 0001349211 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,685

F1 · price: These shares were forfeited in a net share settlement in connection with restrictions lapsing on restricted shares.

SEC source: 0001179110-21-002623 · edgar.xml · nonDerivative · entry 4

Thor Greg J · CIK 0001370086 · SVP--CAO & Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,619

F2 · price: These restricted common shares, shall lapse equally over a 3 year period.

SEC source: 0001179110-21-002623 · edgar.xml · nonDerivative · entry 3

Thor Greg J · CIK 0001370086 · SVP--CAO & Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,811

F1 · price: These shares were forfeited in a net share settlement in connection with restrictions lapsing on restricted shares.

SEC source: 0001179110-21-002623 · edgar.xml · nonDerivative · entry 2

Thor Greg J · CIK 0001370086 · SVP--CAO & Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,565

F1 · price: These shares were forfeited in a net share settlement in connection with restrictions lapsing on restricted shares.

SEC source: 0001179110-21-002623 · edgar.xml · nonDerivative · entry 1

Thor Greg J · CIK 0001370086 · SVP--CAO & Controller

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,283

F1 · price: These shares were forfeited in a net share settlement in connection with restrictions lapsing on restricted shares.

SEC source: 0001179110-21-002621 · edgar.xml · derivative · entry 1

Hartman Todd W. · CIK 0001834053 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,015

Underlying: Common Shares · 12,750 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F2 · shares: Represents Profit Interest Units issued pursuant to Corporate Office Properties Trust 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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F3 · derivative.exercise_date: The Profit Interest Units will vest over three (3) years.

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 Corporate Office 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 Corporate Office Properties Trust, exchangeable for common shares of Corporate Office Properties Trust, currently on a one-for-one basis.

F3 · derivative.expiration_date: The Profit Interest Units will vest over three (3) years.

SEC source: 0001179110-21-001599 · edgar.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,986

SEC source: 0001179110-21-001513 · edgar.xml · derivative · entry 2

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 256,014

Underlying: Common Shares · 4,554 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 · derivative.exercise_price: The reporting person redeemed 4,554 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

F1 · kind: The reporting person redeemed 4,554 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

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

F1 · derivative.expiration_date: The reporting person redeemed 4,554 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

SEC source: 0001179110-21-001513 · edgar.xml · nonDerivative · entry 1

DENTON ROBERT L · CIK 0001250536 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,540

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 4,554 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

F1 · price: The reporting person redeemed 4,554 common units of limited partnership interest ("Common Units") of Corporate Office 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. The issuer elected to issue common shares upon the conversion of the reporting person's Common Units. Common Units have no expiration date.

SEC source: 0001179110-21-001344 · edgar.xml · nonDerivative · entry 2

Mifsud Anthony · CIK 0001349211 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,092

SEC source: 0001179110-21-001344 · edgar.xml · nonDerivative · entry 1

Mifsud Anthony · CIK 0001349211 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 71,983

F1 · price: Received as employment compensation upon satisfaction of the performance criteria for performance-based share units awarded on January 1, 2018.

SEC source: 0001179110-21-001343 · edgar.xml · nonDerivative · entry 2

BUDORICK STEPHEN E · CIK 0001169452 · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 194,281