DHC

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Includes 666.634 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Ms. Hollis.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Includes 560.894 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Mr. Bilotto.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Includes 392.041 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Ms. Harris Jones.

The reported price is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $4.88 to $4.89 per share. Mr. Bilotto undertakes to provide to Diversified Healthcare Trust (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 purchased at each separate price within the range set forth in this footnote.

Includes 385.018 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Mr. Bilotto.

Payment of tax liability by withholding securities incident to the vesting of the security issued in accordance with Rule 16b-3.

Payment of tax liability by withholding securities incident to the vesting of the security issued in accordance with Rule 16b-3.

Payment of tax liability by withholding securities incident to the vesting of the security issued in accordance with Rule 16b-3.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Includes 394.05 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Mr. Bilotto.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Includes 1,411.792 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Mr. Bilotto.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Includes 818.397 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Ms. Hollis.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Includes 721.68 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Ms. Harris Jones.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Payment of tax liability by withholding securities incident to the vesting of the security issued in accordance with Rule 16b-3.

Payment of tax liability by withholding securities incident to the vesting of the security issued in accordance with Rule 16b-3.

Payment of tax liability by withholding securities incident to the vesting of the security issued in accordance with Rule 16b-3.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is award of shares pursuant to the Issuer's equity compensation plan.

Includes 273.111 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Mr. Bilotto.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Includes 83.672 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Ms. Hollis.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

This transaction is being reported to reflect the transfer of these shares to the John L. Harrington Revocable Trust dated February 23, 2000, of which the Reporting Person is a trustee and beneficiary.

This transaction is being reported to reflect the transfer of these shares to the John L. Harrington Revocable Trust dated February 23, 2000, of which the Reporting Person is a trustee and beneficiary.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Includes 793.794 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Ms. Harris Jones.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Includes 365.873 shares acquired under a dividend reinvestment plan since the last Section 16 filing by Mr. Bilotto.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

Payment of tax liability by withholding securities incident to the vesting of the security issued in accordance with Rule 16b-3.

Payment of tax liability by withholding securities incident to the vesting of the security issued in accordance with Rule 16b-3.

Transaction reported is grant of shares pursuant to the Issuer's equity compensation plan.

The reported price is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $2.92 to $3.29 per share. Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

These shares are held by ABP Trust; Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, may be deemed to be a beneficial owner of these shares, but Mr. Portnoy disclaims such beneficial ownership except to the extent of his pecuniary interest therein.

The reported price is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $2.90 to $3.135 per share. Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

These shares are held by ABP Trust; Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, may be deemed to be a beneficial owner of these shares, but Mr. Portnoy disclaims such beneficial ownership except to the extent of his pecuniary interest therein.

The reported price is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $2.725 to $3.005 per share. Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, undertakes to provide to Diversified Healthcare Trust (the "Issuer"), any security holder of the Issuer, or the staff of the Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

These shares are held by ABP Trust; Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, may be deemed to be a beneficial owner of these shares, but Mr. Portnoy disclaims such beneficial ownership except to the extent of his pecuniary interest therein.

The reported price is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $2.38 to $2.755 per share. Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

These shares are held by ABP Trust; Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, may be deemed to be a beneficial owner of these shares, but Mr. Portnoy disclaims such beneficial ownership except to the extent of his pecuniary interest therein.

The reported price is a weighted average purchase price. These shares were purchased in multiple transactions at prices ranging from $2.03 to $2.645 per share. Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

These shares are held by ABP Trust; Mr. Portnoy, as the sole trustee, an officer and the controlling shareholder of ABP Trust, may be deemed to be a beneficial owner of these shares, but Mr. Portnoy disclaims such beneficial ownership except to the extent of his pecuniary interest therein.