Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * PORTNOY BARRY M	2. Issuer Name and Ticker or Trading Symbol SENIOR HOUSING PROPERTIES TRUST [ NYSE: SNH ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __ X __ Director                      _____ 10% Owner _____ Officer (give title below)      _____ Other (specify below)
(Last)          (First)          (Middle) C/O REIT MANAGEMENT & RESEARCH LLC, TWO NEWTON PL., 255 WASH. ST., STE. 300	3. Date of Earliest Transaction (MM/DD/YYYY) 2/6/2015
(Street) NEWTON, MA 02458 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _ X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Shares of Beneficial Interest	2/6/2015		A		6978.95	A	$23.12   (1)	81798.75	I	See Footnote   (2)
Common Shares of Beneficial Interest								274111.544	D

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:
( 1)	Pursuant to the terms of a business management agreement (the "Management Agreement") between the Issuer and Reit Management & Research LLC ("RMR"), the per share price amount listed above is the average of the closing prices of the Common Shares on the New York Stock Exchange for each trading day during the month of January 2015.
( 2)	Represents the pecuniary interest of Mr. Portnoy in Common Shares owned by RMR, of which Reit Management & Research Trust ("RMR Trust") is the sole member. Mr. Portnoy is the Chairman and a director of RMR, and the Chairman, majority beneficial owner and a trustee of RMR Trust. These Common Shares were issued as a portion of the management fee paid by the Issuer to RMR pursuant to the Management Agreement.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PORTNOY BARRY M C/O REIT MANAGEMENT & RESEARCH LLC TWO NEWTON PL., 255 WASH. ST., STE. 300 NEWTON, MA 02458	X

Signatures
/s/ Barry M. Portnoy		2/9/2015
** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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