Sec Form 4 Filing - Enceladus Holding Ltd @ Mallinckrodt plc - 2013-06-28

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

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1. Name and Address of Reporting Person Enceladus Holding Ltd 2. Issuer Name and Ticker or Trading Symbol Mallinckrodt plc [ MNK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) See remarks. (Last) (First) (Middle) ARTHUR COX BUILDING, EARLSFORT TERRACE 3. Date of Earliest Transaction (MM/DD/YY) 06/28/2013 (Street) DUBLIN, L2DUBLIN 2 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 Ordinary Shares 06/28/2013 J( 1 ) 7 D $ 0 0 D Ordinary A Shares 06/28/2013 J( 1 ) 40,000 D $ 0 0 D

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 Enceladus Holding Ltd ARTHUR COX BUILDING EARLSFORT TERRACE DUBLIN, L2DUBLIN 2 See remarks. Signatures /s/ Fintan Clancy 07/02/2013 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Effective as of June 28, 2013 (the "Distribution Date"), Covidien plc ("Covidien") completed the separation of the pharmaceuticals business of Covidien (the "Business") from the rest of Covidien by means of the declaration of a dividend in specie of the Business, effected by the transfer of the Business from Covidien to Mallinckrodt plc and the issuance by Mallinckrodt plc of ordinary shares in its share capital, par value $0.20 per share, credited as fully paid directly to Covidien's shareholders (the "Transaction"). Immediately following completion of the Transaction, Mallinckrodt plc acquired the seven ordinary shares [and 40,000 ordinary A shares] held beneficially by Enceladus Holding Limited for no consideration in accordance with the Irish Companies Acts and cancelled such shares.

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).

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