X0306 4 2018-05-22 0 0001075415 SENIOR HOUSING PROPERTIES TRUST NASDAQ:SNH 0001243972 HARRINGTON JOHN L. C/O THE RMR GROUP LLC TWO NEWTON PL., 255 WASH. ST., STE. 300 NEWTON MA 02458 1 0 0 0 Common Shares of Beneficial Interest 2018-05-22 4 A 0 3000 A 3000 D Common Shares of Beneficial Interest 2018-05-22 5 G 0 E 3000 0 D 0 D Common Shares of Beneficial Interest 2018-05-22 5 G 0 E 3000 0 A 33000 I By Trust 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 (the "Trust"), of which the Reporting Person is a trustee and beneficiary. /s/ John L. Harrington 2018-05-22