#1 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.23 to $19.30, inclusive. The Reporting Person will provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

#2 These shares/units, as applicable, are held by the Orrin S. Shifrin Revocable Trust, of which the Reporting Person is the trustee and a beneficiary.

#1 Each Common Share of Beneficial Interest of Equity Commonwealth ("Common Share") was received in exchange for one Restricted Share Unit ("RSU"), subject to the terms and conditions set forth in the applicable Equity Commonwealth equity compensation plan and the applicable RSU agreement for the Reporting Person. Reflects Common Shares that were issued to the Reporting Person as a result of certain performance criteria being met with respect to previously granted RSUs and a portion of such RSUs vesting on the Transaction Date.

#2 These shares/units, as applicable, are held by the Orrin S. Shifrin Revocable Trust, of which the Reporting Person is the trustee and a beneficiary.

#3 Reflects Common Shares surrendered to the Issuer to satisfy tax withholding obligations in connection with the vesting of restricted Common Shares and RSUs.

#1 Each Common Share of Beneficial Interest of Equity Commonwealth ("Common Share") was received in exchange for one Restricted Share Unit ("RSU"), subject to the terms and conditions set forth in the applicable Equity Commonwealth equity compensation plan and the applicable RSU agreement for the Reporting Person. Reflects Common Shares that were issued to the Reporting Person as a result of certain performance criteria being met with respect to previously granted RSUs and a portion of such RSUs vesting on the Transaction Date.

#2 These shares/units, as applicable, are held by the Orrin S. Shifrin Revocable Trust, of which the Reporting Person is the trustee and a beneficiary.

#3 Reflects Common Shares surrendered to the Issuer to satisfy tax withholding obligations in connection with the vesting of restricted Common Shares and RSUs.

#1 Each Common Share of Beneficial Interest of Equity Commonwealth ("Common Share") was received in exchange for one Restricted Share Unit ("RSU"), subject to the terms and conditions set forth in the applicable Equity Commonwealth equity compensation plan and the applicable RSU agreement for the Reporting Person. Reflects Common Shares that were issued to the Reporting Person as a result of certain performance criteria being met with respect to previously granted RSUs and a portion of such RSUs vesting on the Transaction Date.

#2 These shares/units, as applicable, are held by the Orrin S. Shifrin Revocable Trust, of which the Reporting Person is the trustee and a beneficiary.

#3 Reflects Common Shares surrendered to the Issuer to satisfy tax withholding obligations in connection with the vesting of restricted Common Shares and RSUs.