Sec Form 4 Filing - PORTNOY ADAM D. @ AlerisLife Inc. - 2023-03-18

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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person PORTNOY ADAM D. 2. Issuer Name and Ticker or Trading Symbol AlerisLife Inc. [ ALR] 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 ALERISLIFE INC.,, 400 CENTRE STREET 3. Date of Earliest Transaction (MM/DD/YY) 03/18/2023 (Street) NEWTON, MA02458 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction 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 Stock 03/18/2023 U 57,332 D $ 1.31 0 D Common Stock 03/18/2023 P 22,375,687 ( 1 ) A $ 1.31 22,375,687 ( 2 ) I See Footnote ( 2 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other PORTNOY ADAM D. C/O ALERISLIFE INC., 400 CENTRE STREET NEWTON, MA02458 X Signatures /s/ Adam D. Portnoy 03/20/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to an Agreement and Plan of Merger dated February 2, 2023, ABP Acquisition 2 LLC ("Purchaser"), a wholly owned subsidiary of ABP Acquisition LLC ("Parent"), a wholly owned subsidiary ABP Trust, commenced atender offer (the "Offer") to purchase all of the outstanding shares of common stock of AlerisLife Inc. ("ALR") at a purchase price of $1.31 per share. As of the expiration of the Offer at one minute after 11:59 p.m., Eastern Time, onMarch 17, 2023, 22,375,687 shares had been tendered and not validly withdrawn pursuant to the Offer. Purchaser accepted for purchase all shares tendered and not validly withdrawn pursuant to the Offer. ( 2 )This number reflects 1,799,999 shares owned directly by Parent, 172,784 shares owned directly by ABP Trust and 22,375,687 shares that were tendered in the Offer and accepted for purchase on March 18, 2023, and thereupon owned by Purchaser. Following Purchaser's acceptance for purchase of shares tendered in the Offer, on March 20, 2023, Purchaser was merged with and into ALR, with ALR surviving the merger as a wholly owned subsidiary of Parent. Mr. Portnoy, as president, sole trustee and a beneficial owner 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 pecuniaryinterest therein.

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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.